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use ebase instead of CAC_BASE, some cosmetic fixes
[openwrt.git] / target / linux / ixp4xx / patches / 100-npe_driver.patch
1 diff --git a/Documentation/networking/ixp4xx/IxNpeMicrocode.h b/Documentation/networking/ixp4xx/IxNpeMicrocode.h
2 new file mode 100644
3 index 0000000..e5a4bd3
4 Index: linux-2.6.21-rc1-arm/Documentation/networking/ixp4xx/IxNpeMicrocode.h
5 ===================================================================
6 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
7 +++ linux-2.6.21-rc1-arm/Documentation/networking/ixp4xx/IxNpeMicrocode.h 2007-02-21 02:24:35.000000000 -0800
8 @@ -0,0 +1,143 @@
9 +/*
10 + * IxNpeMicrocode.h - Headerfile for compiling the Intel microcode C file
11 + *
12 + * Copyright (C) 2006 Christian Hohnstaedt <chohnstaedt@innominate.com>
13 + *
14 + * This file is released under the GPLv2
15 + *
16 + *
17 + * compile with
18 + *
19 + * gcc -Wall IxNpeMicrocode.c -o IxNpeMicrocode
20 + *
21 + * Executing the resulting binary on your build-host creates the
22 + * "NPE-[ABC].xxxxxxxx" files containing the selected microcode
23 + *
24 + * fetch the IxNpeMicrocode.c from the Intel Access Library.
25 + * It will include this header.
26 + *
27 + * select Images for every NPE from the following
28 + * (used C++ comments for easy uncommenting ....)
29 + */
30 +
31 +// #define IX_NPEDL_NPEIMAGE_NPEA_ETH_SPAN_MASK_FIREWALL_VLAN_QOS_HDR_CONV_EXTMIB
32 +// #define IX_NPEDL_NPEIMAGE_NPEA_ETH_SPAN_VLAN_QOS_HDR_CONV_EXTMIB
33 +// #define IX_NPEDL_NPEIMAGE_NPEA_ETH_LEARN_FILTER_SPAN_MASK_FIREWALL_VLAN_QOS_EXTMIB
34 +// #define IX_NPEDL_NPEIMAGE_NPEA_HSS_TSLOT_SWITCH
35 +// #define IX_NPEDL_NPEIMAGE_NPEA_ETH_SPAN_FIREWALL_VLAN_QOS_HDR_CONV
36 +// #define IX_NPEDL_NPEIMAGE_NPEA_ETH_LEARN_FILTER_SPAN_FIREWALL_VLAN_QOS
37 +// #define IX_NPEDL_NPEIMAGE_NPEA_ETH_LEARN_FILTER_SPAN_FIREWALL
38 +// #define IX_NPEDL_NPEIMAGE_NPEA_HSS_2_PORT
39 +// #define IX_NPEDL_NPEIMAGE_NPEA_DMA
40 +// #define IX_NPEDL_NPEIMAGE_NPEA_ATM_MPHY_12_PORT
41 +// #define IX_NPEDL_NPEIMAGE_NPEA_HSS0_ATM_MPHY_1_PORT
42 +// #define IX_NPEDL_NPEIMAGE_NPEA_HSS0_ATM_SPHY_1_PORT
43 +// #define IX_NPEDL_NPEIMAGE_NPEA_HSS0
44 +// #define IX_NPEDL_NPEIMAGE_NPEA_WEP
45 +
46 +
47 +// #define IX_NPEDL_NPEIMAGE_NPEB_ETH_SPAN_MASK_FIREWALL_VLAN_QOS_HDR_CONV_EXTMIB
48 +//#define IX_NPEDL_NPEIMAGE_NPEB_ETH_SPAN_VLAN_QOS_HDR_CONV_EXTMIB
49 +// #define IX_NPEDL_NPEIMAGE_NPEB_ETH_LEARN_FILTER_SPAN_MASK_FIREWALL_VLAN_QOS_EXTMIB
50 +// #define IX_NPEDL_NPEIMAGE_NPEB_DMA
51 +// #define IX_NPEDL_NPEIMAGE_NPEB_ETH_SPAN_FIREWALL_VLAN_QOS_HDR_CONV
52 +// #define IX_NPEDL_NPEIMAGE_NPEB_ETH_LEARN_FILTER_SPAN_FIREWALL_VLAN_QOS
53 + #define IX_NPEDL_NPEIMAGE_NPEB_ETH_LEARN_FILTER_SPAN_FIREWALL
54 +
55 +
56 +// #define IX_NPEDL_NPEIMAGE_NPEC_ETH_SPAN_MASK_FIREWALL_VLAN_QOS_HDR_CONV_EXTMIB
57 +// #define IX_NPEDL_NPEIMAGE_NPEC_ETH_SPAN_VLAN_QOS_HDR_CONV_EXTMIB
58 +// #define IX_NPEDL_NPEIMAGE_NPEC_ETH_LEARN_FILTER_SPAN_MASK_FIREWALL_VLAN_QOS_EXTMIB
59 +// #define IX_NPEDL_NPEIMAGE_NPEC_DMA
60 +// #define IX_NPEDL_NPEIMAGE_NPEC_CRYPTO_AES_ETH_LEARN_FILTER_SPAN
61 +// #define IX_NPEDL_NPEIMAGE_NPEC_CRYPTO_AES_ETH_LEARN_FILTER_FIREWALL
62 + #define IX_NPEDL_NPEIMAGE_NPEC_CRYPTO_AES_CCM_ETH
63 +// #define IX_NPEDL_NPEIMAGE_NPEC_CRYPTO_ETH_LEARN_FILTER_SPAN_FIREWALL
64 +// #define IX_NPEDL_NPEIMAGE_NPEC_ETH_SPAN_FIREWALL_VLAN_QOS_HDR_CONV
65 +// #define IX_NPEDL_NPEIMAGE_NPEC_ETH_LEARN_FILTER_SPAN_FIREWALL_VLAN_QOS
66 +// #define IX_NPEDL_NPEIMAGE_NPEC_ETH_LEARN_FILTER_SPAN_FIREWALL
67 +
68 +
69 +#include <stdio.h>
70 +#include <unistd.h>
71 +#include <stdlib.h>
72 +#include <netinet/in.h>
73 +#include <sys/types.h>
74 +#include <sys/stat.h>
75 +#include <fcntl.h>
76 +#include <errno.h>
77 +#include <endian.h>
78 +#include <byteswap.h>
79 +#include <string.h>
80 +
81 +#if __BYTE_ORDER == __LITTLE_ENDIAN
82 +#define to_le32(x) (x)
83 +#define to_be32(x) bswap_32(x)
84 +#else
85 +#define to_be32(x) (x)
86 +#define to_le32(x) bswap_32(x)
87 +#endif
88 +
89 +struct dl_image {
90 + unsigned magic;
91 + unsigned id;
92 + unsigned size;
93 + unsigned data[0];
94 +};
95 +
96 +const unsigned IxNpeMicrocode_array[];
97 +
98 +int main(int argc, char *argv[])
99 +{
100 + struct dl_image *image = (struct dl_image *)IxNpeMicrocode_array;
101 + int imgsiz, i, fd, cnt;
102 + const unsigned *arrayptr = IxNpeMicrocode_array;
103 + const char *names[] = { "IXP425", "IXP465", "unknown" };
104 + int bigendian = 1;
105 +
106 + if (argc > 1) {
107 + if (!strcmp(argv[1], "-le"))
108 + bigendian = 0;
109 + else if (!strcmp(argv[1], "-be"))
110 + bigendian = 1;
111 + else {
112 + printf("Usage: %s <-le|-be>\n", argv[0]);
113 + return EXIT_FAILURE;
114 + }
115 + }
116 +
117 + for (image = (struct dl_image *)arrayptr, cnt=0;
118 + (image->id != 0xfeedf00d) && (image->magic == 0xfeedf00d);
119 + image = (struct dl_image *)(arrayptr), cnt++)
120 + {
121 + unsigned char field[4];
122 + imgsiz = image->size + 3;
123 + *(unsigned*)field = to_be32(image->id);
124 + char filename[40], slnk[10];
125 +
126 + sprintf(filename, "NPE-%c.%08x", (field[0] & 0xf) + 'A',
127 + image->id);
128 + sprintf(slnk, "NPE-%c", (field[0] & 0xf) + 'A');
129 + printf("Writing image: %s.NPE_%c Func: %2x Rev: %02x.%02x "
130 + "Size: %5d to: '%s'\n",
131 + names[field[0] >> 4], (field[0] & 0xf) + 'A',
132 + field[1], field[2], field[3], imgsiz*4, filename);
133 + fd = open(filename, O_CREAT | O_RDWR | O_TRUNC, 0644);
134 + if (fd >= 0) {
135 + for (i=0; i<imgsiz; i++) {
136 + *(unsigned*)field = bigendian ?
137 + to_be32(arrayptr[i]) :
138 + to_le32(arrayptr[i]);
139 + write(fd, field, sizeof(field));
140 + }
141 + close(fd);
142 + unlink(slnk);
143 + symlink(filename, slnk);
144 + } else {
145 + perror(filename);
146 + }
147 + arrayptr += imgsiz;
148 + }
149 + close(fd);
150 + return 0;
151 +}
152 Index: linux-2.6.21-rc1-arm/Documentation/networking/ixp4xx/README
153 ===================================================================
154 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
155 +++ linux-2.6.21-rc1-arm/Documentation/networking/ixp4xx/README 2007-02-21 02:24:35.000000000 -0800
156 @@ -0,0 +1,62 @@
157 +Informations about the Networking Driver using the IXP4XX CPU internal NPEs
158 +and Queue manager.
159 +
160 +If this driver is used, the IAL (Intel Access Library) must not be loaded.
161 +However, the IAL may be loaded, if this Modules are unloaded:
162 + ixp4xx_npe.ko, ixp4xx_qmgr.ko ixp4xx_mac.ko
163 +
164 +This also means that HW crypto accelleration does NOT work when using this
165 +driver, unless I have finished my crypto driver for NPE-C
166 +
167 +
168 +Adoption to your custom board:
169 +------------------------------
170 +use "arch/arm/mach-ixp4xx/ixdp425-setup.c" as template:
171 +
172 +in "static struct mac_plat_info" adopt the entry "phy_id" to your needs
173 +(Ask your hardware designer about the PHY id)
174 +
175 +The order of "&mac0" and "&mac1" in the "struct platform_device"
176 +determines which of them becomes eth0 and eth1
177 +
178 +
179 +The Microcode:
180 +---------------
181 +Solution 1)
182 + Configure "CONFIG_HOTPLUG" and "CONFIG_FW_LOADER" and configure
183 + IXP4XX_NPE as module.
184 + The default hotplug script will load the Firmware from
185 + /usr/lib/hotplug/firmware/NPE-[ABC]
186 + see Documentation/firmware_class/hotplug-script
187 +
188 + You should take care, that $ACTION is "add" and $SUBSYSTEM is "firmware"
189 + to avoid unnessecary calls:
190 + test $ACTION = "remove" -o $SUBSYSTEM != "firmware" && exit
191 +
192 +Solution 2)
193 + create a char-dev: "mknod /dev/misc/npe c 10 184"
194 + cat the Microcode into it:
195 + cat /usr/lib/hotplug/firmware/NPE-* > /dev/misc/npe
196 + This also works if the driver is linked to the kernel
197 +
198 + Having a mix of both (e.g. solution 1 for NPE-B and solution 2 for NPE-C)
199 + is perfectly ok and works.
200 +
201 + The state of the NPEs can be seen and changed at:
202 + /sys/bus/platform/devices/ixp4xx_npe.X/state
203 +
204 +
205 +Obtaining the Microcode:
206 +------------------------
207 +1) IxNpeMicrocode.h in this directory:
208 + Download IPL_IXP400NPELIBRARYWITHCRYPTO-2_1.ZIP from Intel
209 + It unpacks the Microcode IxNpeMicrocode.c
210 + Read the Licence !
211 + Compile it with "gcc -Wall IxNpeMicrocode.c -o IxNpeMicrocode" on your host.
212 + The resulting images can be moved to "/usr/lib/hotplug/firmware"
213 +
214 +2) mc_grab.c in this directory:
215 + Compile and execute it either on the host or on the target
216 + to grab the microcode from a binary image like the RedBoot bootloader.
217 +
218 +
219 Index: linux-2.6.21-rc1-arm/Documentation/networking/ixp4xx/mc_grab.c
220 ===================================================================
221 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
222 +++ linux-2.6.21-rc1-arm/Documentation/networking/ixp4xx/mc_grab.c 2007-02-21 02:24:35.000000000 -0800
223 @@ -0,0 +1,97 @@
224 +/*
225 + * mc_grab.c - grabs IXP4XX microcode from a binary datastream
226 + * e.g. The redboot bootloader....
227 + *
228 + * usage: mc_grab 1010200 2010200 < /dev/mtd/0 > /dev/misc/npe
229 + *
230 + * Copyright (C) 2006 Christian Hohnstaedt <chohnstaedt@innominate.com>
231 + *
232 + * This file is released under the GPLv2
233 + */
234 +
235 +
236 +#include <stdlib.h>
237 +#include <stdio.h>
238 +#include <unistd.h>
239 +#include <netinet/in.h>
240 +#include <sys/types.h>
241 +#include <sys/stat.h>
242 +#include <fcntl.h>
243 +#include <errno.h>
244 +#include <string.h>
245 +
246 +#define MAX_IMG 6
247 +
248 +static void print_mc_info(unsigned id, int siz)
249 +{
250 + unsigned char buf[sizeof(unsigned)];
251 + *(unsigned*)buf = id;
252 + unsigned idx;
253 + const char *names[] = { "IXP425", "IXP465", "unknown" };
254 +
255 + idx = (buf[0] >> 4) < 2 ? (buf[0] >> 4) : 2;
256 +
257 + fprintf(stderr, "Device: %s:NPE_%c Func: %2x Rev: %02x.%02x "
258 + "Size: %5d bytes ID:%08x\n", names[idx], (buf[0] & 0xf)+'A',
259 + buf[1], buf[2], buf[3], siz*4, ntohl(id));
260 +}
261 +
262 +int main(int argc, char *argv[])
263 +{
264 + int i,j;
265 + unsigned char buf[sizeof(unsigned)];
266 + unsigned magic = htonl(0xfeedf00d);
267 + unsigned id, my_ids[MAX_IMG+1], siz, sizbe;
268 + int ret=1, verbose=0;
269 +
270 + for (i=0, j=0; i<argc-1 && j<MAX_IMG; i++) {
271 + if (!strcmp(argv[i+1], "-v"))
272 + verbose = 1;
273 + else
274 + my_ids[j++] = htonl(strtoul(argv[i+1], NULL, 16));
275 + }
276 + my_ids[j] = 0;
277 + if (my_ids[0] == 0 && !verbose) {
278 + fprintf(stderr, "Usage: %s <-v> [ID1] [ID2] [IDn]\n", argv[0]);
279 + return 1;
280 + }
281 +
282 + while ((ret=read(0, buf, sizeof(unsigned))) == sizeof(unsigned)) {
283 + if (*(unsigned*)buf != magic)
284 + continue;
285 + if ((ret=read(0, buf, sizeof(unsigned))) != sizeof(unsigned) )
286 + break;
287 + id = *(unsigned*)buf;
288 +
289 + if (read(0, buf, sizeof(siz)) != sizeof(siz) )
290 + break;
291 + sizbe = *(unsigned*)buf;
292 + siz = ntohl(sizbe);
293 +
294 + if (verbose)
295 + print_mc_info(id, siz);
296 +
297 + for(i=0; my_ids[i]; i++)
298 + if (id == my_ids[i])
299 + break;
300 + if (!my_ids[i])
301 + continue;
302 +
303 + if (!verbose)
304 + print_mc_info(id, siz);
305 +
306 + write(1, &magic, sizeof(magic));
307 + write(1, &id, sizeof(id));
308 + write(1, &sizbe, sizeof(sizbe));
309 + for (i=0; i<siz; i++) {
310 + if (read(0, buf, sizeof(unsigned)) != sizeof(unsigned))
311 + break;
312 + write(1, buf, sizeof(unsigned));
313 + }
314 + if (i != siz)
315 + break;
316 + }
317 + if (ret)
318 + fprintf(stderr, "Error reading Microcode\n");
319 + return ret;
320 +}
321 Index: linux-2.6.21-rc1-arm/arch/arm/mach-ixp4xx/common.c
322 ===================================================================
323 --- linux-2.6.21-rc1-arm.orig/arch/arm/mach-ixp4xx/common.c 2007-02-21 02:24:18.000000000 -0800
324 +++ linux-2.6.21-rc1-arm/arch/arm/mach-ixp4xx/common.c 2007-02-21 02:24:35.000000000 -0800
325 @@ -357,6 +357,90 @@
326 &ixp46x_i2c_controller
327 };
328
329 +static struct npe_plat_data npea = {
330 + .name = "NPE-A",
331 + .data_size = 0x800,
332 + .inst_size = 0x1000,
333 + .id = 0,
334 +};
335 +
336 +static struct npe_plat_data npeb = {
337 + .name = "NPE-B",
338 + .data_size = 0x800,
339 + .inst_size = 0x800,
340 + .id = 1,
341 +};
342 +
343 +static struct npe_plat_data npec = {
344 + .name = "NPE-C",
345 + .data_size = 0x800,
346 + .inst_size = 0x800,
347 + .id = 2,
348 +};
349 +
350 +static struct resource res_npea = {
351 + .start = IXP4XX_NPEA_BASE_PHYS,
352 + .end = IXP4XX_NPEA_BASE_PHYS + 0xfff,
353 + .flags = IORESOURCE_MEM,
354 +};
355 +
356 +static struct resource res_npeb = {
357 + .start = IXP4XX_NPEB_BASE_PHYS,
358 + .end = IXP4XX_NPEB_BASE_PHYS + 0xfff,
359 + .flags = IORESOURCE_MEM,
360 +};
361 +
362 +static struct resource res_npec = {
363 + .start = IXP4XX_NPEC_BASE_PHYS,
364 + .end = IXP4XX_NPEC_BASE_PHYS + 0xfff,
365 + .flags = IORESOURCE_MEM,
366 +};
367 +
368 +static struct platform_device dev_npea = {
369 + .name = "ixp4xx_npe",
370 + .id = 0,
371 + .dev.platform_data = &npea,
372 + .num_resources = 1,
373 + .resource = &res_npea,
374 +};
375 +
376 +static struct platform_device dev_npeb = {
377 + .name = "ixp4xx_npe",
378 + .id = 1,
379 + .dev.platform_data = &npeb,
380 + .num_resources = 1,
381 + .resource = &res_npeb,
382 +};
383 +
384 +static struct platform_device dev_npec = {
385 + .name = "ixp4xx_npe",
386 + .id = 2,
387 + .dev.platform_data = &npec,
388 + .num_resources = 1,
389 + .resource = &res_npec,
390 +};
391 +
392 +/* QMGR */
393 +static struct resource res_qmgr[] = {
394 +{
395 + .start = IXP4XX_QMGR_BASE_PHYS,
396 + .end = IXP4XX_QMGR_BASE_PHYS + IXP4XX_QMGR_REGION_SIZE -1,
397 + .flags = IORESOURCE_MEM,
398 +}, {
399 + .start = IRQ_IXP4XX_QM1,
400 + .flags = IORESOURCE_IRQ,
401 +} };
402 +
403 +static struct platform_device qmgr = {
404 + .name = "ixp4xx_qmgr",
405 + .id = 0,
406 + .dev = {
407 + .coherent_dma_mask = DMA_32BIT_MASK,
408 + },
409 + .num_resources = ARRAY_SIZE(res_qmgr),
410 + .resource = res_qmgr,
411 +};
412 +
413 unsigned long ixp4xx_exp_bus_size;
414 EXPORT_SYMBOL(ixp4xx_exp_bus_size);
415
416 @@ -378,8 +462,19 @@
417 break;
418 }
419 }
420 + npeb.inst_size = 0x1000;
421 + npec.inst_size = 0x1000;
422 }
423
424 + platform_device_register(&qmgr);
425 +
426 + if (ix_fuse() & IX_FUSE_NPEA)
427 + platform_device_register(&dev_npea);
428 + if (ix_fuse() & IX_FUSE_NPEB)
429 + platform_device_register(&dev_npeb);
430 + if (ix_fuse() & IX_FUSE_NPEC)
431 + platform_device_register(&dev_npec);
432 +
433 printk("IXP4xx: Using %luMiB expansion bus window size\n",
434 ixp4xx_exp_bus_size >> 20);
435 }
436 Index: linux-2.6.21-rc1-arm/arch/arm/mach-ixp4xx/ixdp425-setup.c
437 ===================================================================
438 --- linux-2.6.21-rc1-arm.orig/arch/arm/mach-ixp4xx/ixdp425-setup.c 2007-02-21 02:24:18.000000000 -0800
439 +++ linux-2.6.21-rc1-arm/arch/arm/mach-ixp4xx/ixdp425-setup.c 2007-02-21 02:24:35.000000000 -0800
440 @@ -101,10 +101,59 @@
441 .resource = ixdp425_uart_resources
442 };
443
444 +/* MACs */
445 +static struct resource res_mac0 = {
446 + .start = IXP4XX_EthB_BASE_PHYS,
447 + .end = IXP4XX_EthB_BASE_PHYS + 0x1ff,
448 + .flags = IORESOURCE_MEM,
449 +};
450 +
451 +static struct resource res_mac1 = {
452 + .start = IXP4XX_EthC_BASE_PHYS,
453 + .end = IXP4XX_EthC_BASE_PHYS + 0x1ff,
454 + .flags = IORESOURCE_MEM,
455 +};
456 +
457 +static struct mac_plat_info plat_mac0 = {
458 + .npe_id = 1,
459 + .phy_id = 0,
460 + .eth_id = 0,
461 + .rxq_id = 27,
462 + .txq_id = 24,
463 + .rxdoneq_id = 4,
464 +};
465 +
466 +static struct mac_plat_info plat_mac1 = {
467 + .npe_id = 2,
468 + .phy_id = 1,
469 + .eth_id = 1,
470 + .rxq_id = 28,
471 + .txq_id = 25,
472 + .rxdoneq_id = 5,
473 +};
474 +
475 +static struct platform_device mac0 = {
476 + .name = "ixp4xx_mac",
477 + .id = 0,
478 + .dev.platform_data = &plat_mac0,
479 + .num_resources = 1,
480 + .resource = &res_mac0,
481 +};
482 +
483 +static struct platform_device mac1 = {
484 + .name = "ixp4xx_mac",
485 + .id = 1,
486 + .dev.platform_data = &plat_mac1,
487 + .num_resources = 1,
488 + .resource = &res_mac1,
489 +};
490 +
491 static struct platform_device *ixdp425_devices[] __initdata = {
492 &ixdp425_i2c_controller,
493 &ixdp425_flash,
494 - &ixdp425_uart
495 + &ixdp425_uart,
496 + &mac0,
497 + &mac1,
498 };
499
500 static void __init ixdp425_init(void)
501 Index: linux-2.6.21-rc1-arm/drivers/net/Kconfig
502 ===================================================================
503 --- linux-2.6.21-rc1-arm.orig/drivers/net/Kconfig 2007-02-21 02:24:18.000000000 -0800
504 +++ linux-2.6.21-rc1-arm/drivers/net/Kconfig 2007-02-21 02:24:35.000000000 -0800
505 @@ -201,6 +201,8 @@
506
507 source "drivers/net/arm/Kconfig"
508
509 +source "drivers/net/ixp4xx/Kconfig"
510 +
511 config MACE
512 tristate "MACE (Power Mac ethernet) support"
513 depends on NET_ETHERNET && PPC_PMAC && PPC32
514 Index: linux-2.6.21-rc1-arm/drivers/net/Makefile
515 ===================================================================
516 --- linux-2.6.21-rc1-arm.orig/drivers/net/Makefile 2007-02-21 02:24:18.000000000 -0800
517 +++ linux-2.6.21-rc1-arm/drivers/net/Makefile 2007-02-21 02:24:35.000000000 -0800
518 @@ -212,6 +212,7 @@
519 obj-$(CONFIG_IRDA) += irda/
520 obj-$(CONFIG_ETRAX_ETHERNET) += cris/
521 obj-$(CONFIG_ENP2611_MSF_NET) += ixp2000/
522 +obj-$(CONFIG_IXP4XX_NPE) += ixp4xx/
523
524 obj-$(CONFIG_NETCONSOLE) += netconsole.o
525
526 Index: linux-2.6.21-rc1-arm/drivers/net/ixp4xx/Kconfig
527 ===================================================================
528 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
529 +++ linux-2.6.21-rc1-arm/drivers/net/ixp4xx/Kconfig 2007-02-21 02:24:35.000000000 -0800
530 @@ -0,0 +1,48 @@
531 +config IXP4XX_QMGR
532 + tristate "IXP4xx Queue Manager support"
533 + depends on ARCH_IXP4XX
534 + depends on NET_ETHERNET
535 + help
536 + The IXP4XX Queue manager is a configurable hardware ringbuffer.
537 + It is used by the NPEs to exchange data from and to the CPU.
538 + You can either use this OR the Intel Access Library (IAL)
539 +
540 +config IXP4XX_NPE
541 + tristate "IXP4xx NPE support"
542 + depends on ARCH_IXP4XX
543 + depends on NET_ETHERNET
544 + help
545 + The IXP4XX NPE driver supports the 3 CPU co-processors called
546 + "Network Processing Engines" (NPE). It adds support fo downloading
547 + the Microcode (firmware) via Hotplug or character-special-device.
548 + More about this at: Documentation/networking/ixp4xx/README.
549 + You can either use this OR the Intel Access Library (IAL)
550 +
551 +config IXP4XX_FW_LOAD
552 + bool "Use Firmware hotplug for Microcode download"
553 + depends on IXP4XX_NPE
554 + select HOTPLUG
555 + select FW_LOADER
556 + help
557 + The default hotplug script will load the Firmware from
558 + /usr/lib/hotplug/firmware/NPE-[ABC]
559 + see Documentation/firmware_class/hotplug-script
560 +
561 +config IXP4XX_MAC
562 + tristate "IXP4xx MAC support"
563 + depends on IXP4XX_NPE
564 + depends on IXP4XX_QMGR
565 + depends on NET_ETHERNET
566 + select MII
567 + help
568 + The IXP4XX MAC driver supports the MACs on the IXP4XX CPUs.
569 + There are 2 on ixp425 and up to 5 on ixdp465.
570 + You can either use this OR the Intel Access Library (IAL)
571 +
572 +config IXP4XX_CRYPTO
573 + tristate "IXP4xx crypto support"
574 + depends on IXP4XX_NPE
575 + depends on IXP4XX_QMGR
576 + help
577 + This driver is a generic NPE-crypto access layer.
578 + You need additional code in OCF for example.
579 Index: linux-2.6.21-rc1-arm/drivers/net/ixp4xx/Makefile
580 ===================================================================
581 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
582 +++ linux-2.6.21-rc1-arm/drivers/net/ixp4xx/Makefile 2007-02-21 02:24:35.000000000 -0800
583 @@ -0,0 +1,7 @@
584 +obj-$(CONFIG_IXP4XX_QMGR) += ixp4xx_qmgr.o
585 +obj-$(CONFIG_IXP4XX_NPE) += ixp4xx_npe.o
586 +obj-$(CONFIG_IXP4XX_MAC) += ixp4xx_mac.o
587 +obj-$(CONFIG_IXP4XX_CRYPTO) += ixp4xx_crypto.o
588 +
589 +ixp4xx_npe-objs := ucode_dl.o npe_mh.o npe.o
590 +ixp4xx_mac-objs := mac_driver.o phy.o
591 Index: linux-2.6.21-rc1-arm/drivers/net/ixp4xx/ixp4xx_crypto.c
592 ===================================================================
593 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
594 +++ linux-2.6.21-rc1-arm/drivers/net/ixp4xx/ixp4xx_crypto.c 2007-02-21 02:24:35.000000000 -0800
595 @@ -0,0 +1,851 @@
596 +/*
597 + * ixp4xx_crypto.c - interface to the HW crypto
598 + *
599 + * Copyright (C) 2006 Christian Hohnstaedt <chohnstaedt@innominate.com>
600 + *
601 + * This file is released under the GPLv2
602 + */
603 +
604 +#include <linux/ixp_qmgr.h>
605 +#include <linux/ixp_npe.h>
606 +#include <linux/dma-mapping.h>
607 +#include <linux/dmapool.h>
608 +#include <linux/device.h>
609 +#include <linux/delay.h>
610 +#include <linux/slab.h>
611 +#include <linux/kernel.h>
612 +#include <linux/ixp_crypto.h>
613 +
614 +#define SEND_QID 29
615 +#define RECV_QID 30
616 +
617 +#define NPE_ID 2 /* NPE C */
618 +
619 +#define QUEUE_SIZE 64
620 +#define MY_VERSION "0.0.1"
621 +
622 +/* local head for all sa_ctx */
623 +static struct ix_sa_master sa_master;
624 +
625 +static const struct ix_hash_algo _hash_algos[] = {
626 +{
627 + .name = "MD5",
628 + .cfgword = 0xAA010004,
629 + .digest_len = 16,
630 + .icv = "\x01\x23\x45\x67\x89\xAB\xCD\xEF"
631 + "\xFE\xDC\xBA\x98\x76\x54\x32\x10",
632 + .type = HASH_TYPE_MD5,
633 +},{
634 + .name = "SHA1",
635 + .cfgword = 0x00000005,
636 + .digest_len = 20,
637 + .icv = "\x67\x45\x23\x01\xEF\xCD\xAB\x89\x98\xBA"
638 + "\xDC\xFE\x10\x32\x54\x76\xC3\xD2\xE1\xF0",
639 + .type = HASH_TYPE_SHA1,
640 +#if 0
641 +},{
642 + .name = "CBC MAC",
643 + .digest_len = 64,
644 + .aad_len = 48,
645 + .type = HASH_TYPE_CBCMAC,
646 +#endif
647 +} };
648 +
649 +static const struct ix_cipher_algo _cipher_algos[] = {
650 +{
651 + .name = "DES ECB",
652 + .cfgword_enc = CIPH_ENCR | MOD_DES | MOD_ECB | KEYLEN_192,
653 + .cfgword_dec = CIPH_DECR | MOD_DES | MOD_ECB | KEYLEN_192,
654 + .block_len = 8,
655 + .type = CIPHER_TYPE_DES,
656 + .mode = CIPHER_MODE_ECB,
657 +},{
658 + .name = "DES CBC",
659 + .cfgword_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192,
660 + .cfgword_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192,
661 + .iv_len = 8,
662 + .block_len = 8,
663 + .type = CIPHER_TYPE_DES,
664 + .mode = CIPHER_MODE_CBC,
665 +},{
666 + .name = "3DES ECB",
667 + .cfgword_enc = CIPH_ENCR | MOD_TDEA3 | MOD_ECB | KEYLEN_192,
668 + .cfgword_dec = CIPH_DECR | MOD_TDEA3 | MOD_ECB | KEYLEN_192,
669 + .block_len = 8,
670 + .type = CIPHER_TYPE_3DES,
671 + .mode = CIPHER_MODE_ECB,
672 +},{
673 + .name = "3DES CBC",
674 + .cfgword_enc = CIPH_ENCR | MOD_TDEA3 | MOD_CBC_ENC | KEYLEN_192,
675 + .cfgword_dec = CIPH_DECR | MOD_TDEA3 | MOD_CBC_DEC | KEYLEN_192,
676 + .iv_len = 8,
677 + .block_len = 8,
678 + .type = CIPHER_TYPE_3DES,
679 + .mode = CIPHER_MODE_CBC,
680 +},{
681 + .name = "AES ECB",
682 + .cfgword_enc = CIPH_ENCR | ALGO_AES | MOD_ECB,
683 + .cfgword_dec = CIPH_DECR | ALGO_AES | MOD_ECB,
684 + .block_len = 16,
685 + .type = CIPHER_TYPE_AES,
686 + .mode = CIPHER_MODE_ECB,
687 +},{
688 + .name = "AES CBC",
689 + .cfgword_enc = CIPH_ENCR | ALGO_AES | MOD_CBC_ENC,
690 + .cfgword_dec = CIPH_DECR | ALGO_AES | MOD_CBC_DEC,
691 + .block_len = 16,
692 + .iv_len = 16,
693 + .type = CIPHER_TYPE_AES,
694 + .mode = CIPHER_MODE_CBC,
695 +},{
696 + .name = "AES CTR",
697 + .cfgword_enc = CIPH_ENCR | ALGO_AES | MOD_CTR,
698 + .cfgword_dec = CIPH_ENCR | ALGO_AES | MOD_CTR,
699 + .block_len = 16,
700 + .iv_len = 16,
701 + .type = CIPHER_TYPE_AES,
702 + .mode = CIPHER_MODE_CTR,
703 +#if 0
704 +},{
705 + .name = "AES CCM",
706 + .cfgword_enc = CIPH_ENCR | ALGO_AES | MOD_CCM_ENC,
707 + .cfgword_dec = CIPH_ENCR | ALGO_AES | MOD_CCM_DEC,
708 + .block_len = 16,
709 + .iv_len = 16,
710 + .type = CIPHER_TYPE_AES,
711 + .mode = CIPHER_MODE_CCM,
712 +#endif
713 +} };
714 +
715 +const struct ix_hash_algo *ix_hash_by_id(int type)
716 +{
717 + int i;
718 +
719 + for(i=0; i<ARRAY_SIZE(_hash_algos); i++) {
720 + if (_hash_algos[i].type == type)
721 + return _hash_algos + i;
722 + }
723 + return NULL;
724 +}
725 +
726 +const struct ix_cipher_algo *ix_cipher_by_id(int type, int mode)
727 +{
728 + int i;
729 +
730 + for(i=0; i<ARRAY_SIZE(_cipher_algos); i++) {
731 + if (_cipher_algos[i].type==type && _cipher_algos[i].mode==mode)
732 + return _cipher_algos + i;
733 + }
734 + return NULL;
735 +}
736 +
737 +static void irqcb_recv(struct qm_queue *queue);
738 +
739 +static int init_sa_master(struct ix_sa_master *master)
740 +{
741 + struct npe_info *npe;
742 + int ret = -ENODEV;
743 +
744 + if (! (ix_fuse() & (IX_FUSE_HASH | IX_FUSE_AES | IX_FUSE_DES))) {
745 + printk(KERN_ERR "ixp_crypto: No HW crypto available\n");
746 + return ret;
747 + }
748 + memset(master, 0, sizeof(struct ix_sa_master));
749 + master->npe_dev = get_npe_by_id(NPE_ID);
750 + if (! master->npe_dev)
751 + goto err;
752 +
753 + npe = dev_get_drvdata(master->npe_dev);
754 +
755 + if (npe_status(npe) & IX_NPEDL_EXCTL_STATUS_RUN) {
756 + switch (npe->img_info[1]) {
757 + case 4:
758 + printk(KERN_INFO "Crypto AES avaialable\n");
759 + break;
760 + case 5:
761 + printk(KERN_INFO "Crypto AES and CCM avaialable\n");
762 + break;
763 + default:
764 + printk(KERN_WARNING "Current microcode for %s has no"
765 + " crypto capabilities\n", npe->plat->name);
766 + break;
767 + }
768 + }
769 + rwlock_init(&master->lock);
770 + master->dmapool = dma_pool_create("ixp4xx_crypto", master->npe_dev,
771 + sizeof(struct npe_crypt_cont), 32, 0);
772 + if (!master->dmapool) {
773 + ret = -ENOMEM;
774 + goto err;
775 + }
776 + master->sendq = request_queue(SEND_QID, QUEUE_SIZE);
777 + if (IS_ERR(master->sendq)) {
778 + printk(KERN_ERR "ixp4xx_crypto: Error requesting Q: %d\n",
779 + SEND_QID);
780 + ret = PTR_ERR(master->sendq);
781 + goto err;
782 + }
783 + master->recvq = request_queue(RECV_QID, QUEUE_SIZE);
784 + if (IS_ERR(master->recvq)) {
785 + printk(KERN_ERR "ixp4xx_crypto: Error requesting Q: %d\n",
786 + RECV_QID);
787 + ret = PTR_ERR(master->recvq);
788 + release_queue(master->sendq);
789 + goto err;
790 + }
791 +
792 + master->recvq->irq_cb = irqcb_recv;
793 + queue_set_watermarks(master->recvq, 0, 0);
794 + queue_set_irq_src(master->recvq, Q_IRQ_ID_NOT_E);
795 + queue_enable_irq(master->recvq);
796 + printk(KERN_INFO "ixp4xx_crypto " MY_VERSION " registered successfully\n");
797 +
798 + return 0;
799 +err:
800 + if (master->dmapool)
801 + dma_pool_destroy(master->dmapool);
802 + if (! master->npe_dev)
803 + put_device(master->npe_dev);
804 + return ret;
805 +
806 +}
807 +
808 +static void release_sa_master(struct ix_sa_master *master)
809 +{
810 + struct npe_crypt_cont *cont;
811 + unsigned long flags;
812 +
813 + write_lock_irqsave(&master->lock, flags);
814 + while (master->pool) {
815 + cont = master->pool;
816 + master->pool = cont->next;
817 + dma_pool_free(master->dmapool, cont, cont->phys);
818 + master->pool_size--;
819 + }
820 + write_unlock_irqrestore(&master->lock, flags);
821 + if (master->pool_size) {
822 + printk(KERN_ERR "ixp4xx_crypto: %d items lost from DMA pool\n",
823 + master->pool_size);
824 + }
825 +
826 + dma_pool_destroy(master->dmapool);
827 + release_queue(master->sendq);
828 + release_queue(master->recvq);
829 + return_npe_dev(master->npe_dev);
830 +}
831 +
832 +static struct npe_crypt_cont *ix_sa_get_cont(struct ix_sa_master *master)
833 +{
834 + unsigned long flags;
835 + struct npe_crypt_cont *cont;
836 + dma_addr_t handle;
837 +
838 + write_lock_irqsave(&master->lock, flags);
839 + if (!master->pool) {
840 + cont = dma_pool_alloc(master->dmapool, GFP_ATOMIC, &handle);
841 + if (cont) {
842 + master->pool_size++;
843 + cont->phys = handle;
844 + cont->virt = cont;
845 + }
846 + } else {
847 + cont = master->pool;
848 + master->pool = cont->next;
849 + }
850 + write_unlock_irqrestore(&master->lock, flags);
851 + return cont;
852 +}
853 +
854 +static void
855 +ix_sa_return_cont(struct ix_sa_master *master,struct npe_crypt_cont *cont)
856 +{
857 + unsigned long flags;
858 +
859 + write_lock_irqsave(&master->lock, flags);
860 + cont->next = master->pool;
861 + master->pool = cont;
862 + write_unlock_irqrestore(&master->lock, flags);
863 +}
864 +
865 +static void free_sa_dir(struct ix_sa_ctx *sa_ctx, struct ix_sa_dir *dir)
866 +{
867 + memset(dir->npe_ctx, 0, NPE_CTX_LEN);
868 + dma_pool_free(sa_ctx->master->dmapool, dir->npe_ctx,
869 + dir->npe_ctx_phys);
870 +}
871 +
872 +static void ix_sa_ctx_destroy(struct ix_sa_ctx *sa_ctx)
873 +{
874 + BUG_ON(sa_ctx->state != STATE_UNLOADING);
875 + free_sa_dir(sa_ctx, &sa_ctx->encrypt);
876 + free_sa_dir(sa_ctx, &sa_ctx->decrypt);
877 + kfree(sa_ctx);
878 + module_put(THIS_MODULE);
879 +}
880 +
881 +static void recv_pack(struct qm_queue *queue, u32 phys)
882 +{
883 + struct ix_sa_ctx *sa_ctx;
884 + struct npe_crypt_cont *cr_cont;
885 + struct npe_cont *cont;
886 + int failed;
887 +
888 + failed = phys & 0x1;
889 + phys &= ~0x3;
890 +
891 + cr_cont = dma_to_virt(queue->dev, phys);
892 + cr_cont = cr_cont->virt;
893 + sa_ctx = cr_cont->ctl.crypt.sa_ctx;
894 +
895 + phys = npe_to_cpu32(cr_cont->ctl.crypt.src_buf);
896 + if (phys) {
897 + cont = dma_to_virt(queue->dev, phys);
898 + cont = cont->virt;
899 + } else {
900 + cont = NULL;
901 + }
902 + if (cr_cont->ctl.crypt.oper_type == OP_PERFORM) {
903 + dma_unmap_single(sa_ctx->master->npe_dev,
904 + cont->eth.phys_addr,
905 + cont->eth.buf_len,
906 + DMA_BIDIRECTIONAL);
907 + if (sa_ctx->perf_cb)
908 + sa_ctx->perf_cb(sa_ctx, cont->data, failed);
909 + qmgr_return_cont(dev_get_drvdata(queue->dev), cont);
910 + ix_sa_return_cont(sa_ctx->master, cr_cont);
911 + if (atomic_dec_and_test(&sa_ctx->use_cnt))
912 + ix_sa_ctx_destroy(sa_ctx);
913 + return;
914 + }
915 +
916 + /* We are registering */
917 + switch (cr_cont->ctl.crypt.mode) {
918 + case NPE_OP_HASH_GEN_ICV:
919 + /* 1 out of 2 HMAC preparation operations completed */
920 + dma_unmap_single(sa_ctx->master->npe_dev,
921 + cont->eth.phys_addr,
922 + cont->eth.buf_len,
923 + DMA_TO_DEVICE);
924 + kfree(cont->data);
925 + qmgr_return_cont(dev_get_drvdata(queue->dev), cont);
926 + break;
927 + case NPE_OP_ENC_GEN_KEY:
928 + memcpy(sa_ctx->decrypt.npe_ctx + sizeof(u32),
929 + sa_ctx->rev_aes->ctl.rev_aes_key + sizeof(u32),
930 + sa_ctx->c_key.len);
931 + /* REV AES data not needed anymore, free it */
932 + ix_sa_return_cont(sa_ctx->master, sa_ctx->rev_aes);
933 + sa_ctx->rev_aes = NULL;
934 + break;
935 + default:
936 + printk(KERN_ERR "Unknown crypt-register mode: %x\n",
937 + cr_cont->ctl.crypt.mode);
938 +
939 + }
940 + if (cr_cont->ctl.crypt.oper_type == OP_REG_DONE) {
941 + if (sa_ctx->state == STATE_UNREGISTERED)
942 + sa_ctx->state = STATE_REGISTERED;
943 + if (sa_ctx->reg_cb)
944 + sa_ctx->reg_cb(sa_ctx, failed);
945 + }
946 + ix_sa_return_cont(sa_ctx->master, cr_cont);
947 + if (atomic_dec_and_test(&sa_ctx->use_cnt))
948 + ix_sa_ctx_destroy(sa_ctx);
949 +}
950 +
951 +static void irqcb_recv(struct qm_queue *queue)
952 +{
953 + u32 phys;
954 +
955 + queue_ack_irq(queue);
956 + while ((phys = queue_get_entry(queue)))
957 + recv_pack(queue, phys);
958 +}
959 +
960 +static int init_sa_dir(struct ix_sa_ctx *sa_ctx, struct ix_sa_dir *dir)
961 +{
962 + dir->npe_ctx = dma_pool_alloc(sa_ctx->master->dmapool,
963 + sa_ctx->gfp_flags, &dir->npe_ctx_phys);
964 + if (!dir->npe_ctx) {
965 + return 1;
966 + }
967 + memset(dir->npe_ctx, 0, NPE_CTX_LEN);
968 + return 0;
969 +}
970 +
971 +struct ix_sa_ctx *ix_sa_ctx_new(int priv_len, gfp_t flags)
972 +{
973 + struct ix_sa_ctx *sa_ctx;
974 + struct ix_sa_master *master = &sa_master;
975 + struct npe_info *npe = dev_get_drvdata(master->npe_dev);
976 +
977 + /* first check if Microcode was downloaded into this NPE */
978 + if (!( npe_status(npe) & IX_NPEDL_EXCTL_STATUS_RUN)) {
979 + printk(KERN_ERR "%s not running\n", npe->plat->name);
980 + return NULL;
981 + }
982 + switch (npe->img_info[1]) {
983 + case 4:
984 + case 5:
985 + break;
986 + default:
987 + /* No crypto Microcode */
988 + return NULL;
989 + }
990 + if (!try_module_get(THIS_MODULE)) {
991 + return NULL;
992 + }
993 +
994 + sa_ctx = kzalloc(sizeof(struct ix_sa_ctx) + priv_len, flags);
995 + if (!sa_ctx) {
996 + goto err_put;
997 + }
998 +
999 + sa_ctx->master = master;
1000 + sa_ctx->gfp_flags = flags;
1001 +
1002 + if (init_sa_dir(sa_ctx, &sa_ctx->encrypt))
1003 + goto err_free;
1004 + if (init_sa_dir(sa_ctx, &sa_ctx->decrypt)) {
1005 + free_sa_dir(sa_ctx, &sa_ctx->encrypt);
1006 + goto err_free;
1007 + }
1008 + if (priv_len)
1009 + sa_ctx->priv = sa_ctx + 1;
1010 +
1011 + atomic_set(&sa_ctx->use_cnt, 1);
1012 + return sa_ctx;
1013 +
1014 +err_free:
1015 + kfree(sa_ctx);
1016 +err_put:
1017 + module_put(THIS_MODULE);
1018 + return NULL;
1019 +}
1020 +
1021 +void ix_sa_ctx_free(struct ix_sa_ctx *sa_ctx)
1022 +{
1023 + sa_ctx->state = STATE_UNLOADING;
1024 + if (atomic_dec_and_test(&sa_ctx->use_cnt))
1025 + ix_sa_ctx_destroy(sa_ctx);
1026 + else
1027 + printk("ix_sa_ctx_free -> delayed: %p %d\n",
1028 + sa_ctx, atomic_read(&sa_ctx->use_cnt));
1029 +}
1030 +
1031 +/* http://www.ietf.org/rfc/rfc2104.txt */
1032 +#define HMAC_IPAD_VALUE 0x36
1033 +#define HMAC_OPAD_VALUE 0x5C
1034 +#define PAD_BLOCKLEN 64
1035 +
1036 +static int register_chain_var(struct ix_sa_ctx *sa_ctx,
1037 + unsigned char *pad, u32 target, int init_len, u32 ctx_addr, int oper)
1038 +{
1039 + struct npe_crypt_cont *cr_cont;
1040 + struct npe_cont *cont;
1041 +
1042 + cr_cont = ix_sa_get_cont(sa_ctx->master);
1043 + if (!cr_cont)
1044 + return -ENOMEM;
1045 +
1046 + cr_cont->ctl.crypt.sa_ctx = sa_ctx;
1047 + cr_cont->ctl.crypt.auth_offs = 0;
1048 + cr_cont->ctl.crypt.auth_len =cpu_to_npe16(PAD_BLOCKLEN);
1049 + cr_cont->ctl.crypt.crypto_ctx = cpu_to_npe32(ctx_addr);
1050 +
1051 + cont = qmgr_get_cont(dev_get_drvdata(sa_ctx->master->sendq->dev));
1052 + if (!cont) {
1053 + ix_sa_return_cont(sa_ctx->master, cr_cont);
1054 + return -ENOMEM;
1055 + }
1056 +
1057 + cont->data = pad;
1058 + cont->eth.next = 0;
1059 + cont->eth.buf_len = cpu_to_npe16(PAD_BLOCKLEN);
1060 + cont->eth.pkt_len = 0;
1061 +
1062 + cont->eth.phys_addr = cpu_to_npe32(dma_map_single(
1063 + sa_ctx->master->npe_dev, pad, PAD_BLOCKLEN, DMA_TO_DEVICE));
1064 +
1065 + cr_cont->ctl.crypt.src_buf = cpu_to_npe32(cont->phys);
1066 + cr_cont->ctl.crypt.oper_type = oper;
1067 +
1068 + cr_cont->ctl.crypt.addr.icv = cpu_to_npe32(target);
1069 + cr_cont->ctl.crypt.mode = NPE_OP_HASH_GEN_ICV;
1070 + cr_cont->ctl.crypt.init_len = init_len;
1071 +
1072 + atomic_inc(&sa_ctx->use_cnt);
1073 + queue_put_entry(sa_ctx->master->sendq, cr_cont->phys);
1074 + if (queue_stat(sa_ctx->master->sendq) == 2) { /* overflow */
1075 + atomic_dec(&sa_ctx->use_cnt);
1076 + qmgr_return_cont(dev_get_drvdata(sa_ctx->master->sendq->dev),
1077 + cont);
1078 + ix_sa_return_cont(sa_ctx->master, cr_cont);
1079 + return -ENOMEM;
1080 + }
1081 + return 0;
1082 +}
1083 +
1084 +/* Return value
1085 + * 0 if nothing registered,
1086 + * 1 if something registered and
1087 + * < 0 on error
1088 + */
1089 +static int ix_sa_ctx_setup_auth(struct ix_sa_ctx *sa_ctx,
1090 + const struct ix_hash_algo *algo, int len, int oper, int encrypt)
1091 +{
1092 + unsigned char *ipad, *opad;
1093 + u32 itarget, otarget, ctx_addr;
1094 + unsigned char *cinfo;
1095 + int init_len, i, ret = 0;
1096 + struct qm_qmgr *qmgr;
1097 + struct ix_sa_dir *dir;
1098 + u32 cfgword;
1099 +
1100 + dir = encrypt ? &sa_ctx->encrypt : &sa_ctx->decrypt;
1101 + cinfo = dir->npe_ctx + dir->npe_ctx_idx;
1102 +
1103 + qmgr = dev_get_drvdata(sa_ctx->master->sendq->dev);
1104 +
1105 + cinfo = dir->npe_ctx + dir->npe_ctx_idx;
1106 + sa_ctx->h_algo = algo;
1107 +
1108 + if (!algo) {
1109 + dir->npe_mode |= NPE_OP_HMAC_DISABLE;
1110 + return 0;
1111 + }
1112 + if (algo->type == HASH_TYPE_CBCMAC) {
1113 + dir->npe_mode |= NPE_OP_CCM_ENABLE | NPE_OP_HMAC_DISABLE;
1114 + return 0;
1115 + }
1116 + if (sa_ctx->h_key.len > 64 || sa_ctx->h_key.len < algo->digest_len)
1117 + return -EINVAL;
1118 + if (len > algo->digest_len || (len % 4))
1119 + return -EINVAL;
1120 + if (!len)
1121 + len = algo->digest_len;
1122 +
1123 + sa_ctx->digest_len = len;
1124 +
1125 + /* write cfg word to cryptinfo */
1126 + cfgword = algo->cfgword | ((len/4) << 8);
1127 + *(u32*)cinfo = cpu_to_be32(cfgword);
1128 + cinfo += sizeof(cfgword);
1129 +
1130 + /* write ICV to cryptinfo */
1131 + memcpy(cinfo, algo->icv, algo->digest_len);
1132 + cinfo += algo->digest_len;
1133 +
1134 + itarget = dir->npe_ctx_phys + dir->npe_ctx_idx
1135 + + sizeof(algo->cfgword);
1136 + otarget = itarget + algo->digest_len;
1137 +
1138 + opad = kzalloc(PAD_BLOCKLEN, sa_ctx->gfp_flags | GFP_DMA);
1139 + if (!opad) {
1140 + return -ENOMEM;
1141 + }
1142 + ipad = kzalloc(PAD_BLOCKLEN, sa_ctx->gfp_flags | GFP_DMA);
1143 + if (!ipad) {
1144 + kfree(opad);
1145 + return -ENOMEM;
1146 + }
1147 + memcpy(ipad, sa_ctx->h_key.key, sa_ctx->h_key.len);
1148 + memcpy(opad, sa_ctx->h_key.key, sa_ctx->h_key.len);
1149 + for (i = 0; i < PAD_BLOCKLEN; i++) {
1150 + ipad[i] ^= HMAC_IPAD_VALUE;
1151 + opad[i] ^= HMAC_OPAD_VALUE;
1152 + }
1153 + init_len = cinfo - (dir->npe_ctx + dir->npe_ctx_idx);
1154 + ctx_addr = dir->npe_ctx_phys + dir->npe_ctx_idx;
1155 +
1156 + dir->npe_ctx_idx += init_len;
1157 + dir->npe_mode |= NPE_OP_HASH_ENABLE;
1158 +
1159 + if (!encrypt)
1160 + dir->npe_mode |= NPE_OP_HASH_VERIFY;
1161 +
1162 + /* register first chainvar */
1163 + ret = register_chain_var(sa_ctx, opad, otarget,
1164 + init_len, ctx_addr, OP_REGISTER);
1165 + if (ret) {
1166 + kfree(ipad);
1167 + kfree(opad);
1168 + return ret;
1169 + }
1170 +
1171 + /* register second chainvar */
1172 + ret = register_chain_var(sa_ctx, ipad, itarget,
1173 + init_len, ctx_addr, oper);
1174 + if (ret) {
1175 + kfree(ipad);
1176 + return ret;
1177 + }
1178 +
1179 + return 1;
1180 +}
1181 +
1182 +static int gen_rev_aes_key(struct ix_sa_ctx *sa_ctx,
1183 + u32 keylen_cfg, int cipher_op)
1184 +{
1185 + unsigned char *cinfo;
1186 + struct npe_crypt_cont *cr_cont;
1187 +
1188 + keylen_cfg |= CIPH_ENCR | ALGO_AES | MOD_ECB;
1189 + sa_ctx->rev_aes = ix_sa_get_cont(sa_ctx->master);
1190 + if (!sa_ctx->rev_aes)
1191 + return -ENOMEM;
1192 +
1193 + cinfo = sa_ctx->rev_aes->ctl.rev_aes_key;
1194 + *(u32*)cinfo = cpu_to_be32(keylen_cfg);
1195 + cinfo += sizeof(keylen_cfg);
1196 +
1197 + memcpy(cinfo, sa_ctx->c_key.key, sa_ctx->c_key.len);
1198 +
1199 + cr_cont = ix_sa_get_cont(sa_ctx->master);
1200 + if (!cr_cont) {
1201 + ix_sa_return_cont(sa_ctx->master, sa_ctx->rev_aes);
1202 + sa_ctx->rev_aes = NULL;
1203 + return -ENOMEM;
1204 + }
1205 + cr_cont->ctl.crypt.sa_ctx = sa_ctx;
1206 + cr_cont->ctl.crypt.oper_type = cipher_op;
1207 +
1208 + cr_cont->ctl.crypt.crypt_offs = 0;
1209 + cr_cont->ctl.crypt.crypt_len = cpu_to_npe16(AES_BLOCK128);
1210 + cr_cont->ctl.crypt.addr.rev_aes = cpu_to_npe32(
1211 + sa_ctx->rev_aes->phys + sizeof(keylen_cfg));
1212 +
1213 + cr_cont->ctl.crypt.src_buf = 0;
1214 + cr_cont->ctl.crypt.crypto_ctx = cpu_to_npe32(sa_ctx->rev_aes->phys);
1215 + cr_cont->ctl.crypt.mode = NPE_OP_ENC_GEN_KEY;
1216 + cr_cont->ctl.crypt.init_len = sa_ctx->decrypt.npe_ctx_idx;
1217 +
1218 + atomic_inc(&sa_ctx->use_cnt);
1219 + queue_put_entry(sa_ctx->master->sendq, cr_cont->phys);
1220 + if (queue_stat(sa_ctx->master->sendq) == 2) { /* overflow */
1221 + atomic_dec(&sa_ctx->use_cnt);
1222 + ix_sa_return_cont(sa_ctx->master, cr_cont);
1223 + ix_sa_return_cont(sa_ctx->master, sa_ctx->rev_aes);
1224 + sa_ctx->rev_aes = NULL;
1225 + return -ENOMEM;
1226 + }
1227 +
1228 + return 1;
1229 +}
1230 +
1231 +/* Return value
1232 + * 0 if nothing registered,
1233 + * 1 if something registered and
1234 + * < 0 on error
1235 + */
1236 +static int ix_sa_ctx_setup_cipher(struct ix_sa_ctx *sa_ctx,
1237 + const struct ix_cipher_algo *algo, int cipher_op, int encrypt)
1238 +{
1239 + unsigned char *cinfo;
1240 + int keylen, init_len;
1241 + u32 cipher_cfg;
1242 + u32 keylen_cfg = 0;
1243 + struct ix_sa_dir *dir;
1244 +
1245 + dir = encrypt ? &sa_ctx->encrypt : &sa_ctx->decrypt;
1246 + cinfo = dir->npe_ctx + dir->npe_ctx_idx;
1247 +
1248 + sa_ctx->c_algo = algo;
1249 +
1250 + if (!algo)
1251 + return 0;
1252 +
1253 + if (algo->type == CIPHER_TYPE_DES && sa_ctx->c_key.len != 8)
1254 + return -EINVAL;
1255 +
1256 + if (algo->type == CIPHER_TYPE_3DES && sa_ctx->c_key.len != 24)
1257 + return -EINVAL;
1258 +
1259 + keylen = 24;
1260 +
1261 + if (encrypt) {
1262 + cipher_cfg = algo->cfgword_enc;
1263 + dir->npe_mode |= NPE_OP_CRYPT_ENCRYPT;
1264 + } else {
1265 + cipher_cfg = algo->cfgword_dec;
1266 + }
1267 + if (algo->type == CIPHER_TYPE_AES) {
1268 + switch (sa_ctx->c_key.len) {
1269 + case 16: keylen_cfg = MOD_AES128 | KEYLEN_128; break;
1270 + case 24: keylen_cfg = MOD_AES192 | KEYLEN_192; break;
1271 + case 32: keylen_cfg = MOD_AES256 | KEYLEN_256; break;
1272 + default: return -EINVAL;
1273 + }
1274 + keylen = sa_ctx->c_key.len;
1275 + cipher_cfg |= keylen_cfg;
1276 + }
1277 +
1278 + /* write cfg word to cryptinfo */
1279 + *(u32*)cinfo = cpu_to_be32(cipher_cfg);
1280 + cinfo += sizeof(cipher_cfg);
1281 +
1282 + /* write cipher key to cryptinfo */
1283 + memcpy(cinfo, sa_ctx->c_key.key, sa_ctx->c_key.len);
1284 + cinfo += keylen;
1285 +
1286 + init_len = cinfo - (dir->npe_ctx + dir->npe_ctx_idx);
1287 + dir->npe_ctx_idx += init_len;
1288 +
1289 + dir->npe_mode |= NPE_OP_CRYPT_ENABLE;
1290 +
1291 + if (algo->type == CIPHER_TYPE_AES && !encrypt) {
1292 + return gen_rev_aes_key(sa_ctx, keylen_cfg, cipher_op);
1293 + }
1294 +
1295 + return 0;
1296 +}
1297 +
1298 +/* returns 0 on OK, <0 on error and 1 on overflow */
1299 +int ix_sa_crypto_perform(struct ix_sa_ctx *sa_ctx, u8 *data, void *ptr,
1300 + int datalen, int c_offs, int c_len, int a_offs, int a_len,
1301 + int hmac, char *iv, int encrypt)
1302 +{
1303 + struct npe_crypt_cont *cr_cont;
1304 + struct npe_cont *cont;
1305 + u32 data_phys;
1306 + int ret = -ENOMEM;
1307 + struct ix_sa_dir *dir;
1308 +
1309 + dir = encrypt ? &sa_ctx->encrypt : &sa_ctx->decrypt;
1310 +
1311 + if (sa_ctx->state != STATE_REGISTERED)
1312 + return -ENOENT;
1313 +
1314 + cr_cont = ix_sa_get_cont(sa_ctx->master);
1315 + if (!cr_cont)
1316 + return ret;
1317 +
1318 + cr_cont->ctl.crypt.sa_ctx = sa_ctx;
1319 + cr_cont->ctl.crypt.crypto_ctx = cpu_to_npe32(dir->npe_ctx_phys);
1320 + cr_cont->ctl.crypt.oper_type = OP_PERFORM;
1321 + cr_cont->ctl.crypt.mode = dir->npe_mode;
1322 + cr_cont->ctl.crypt.init_len = dir->npe_ctx_idx;
1323 +
1324 + if (sa_ctx->c_algo) {
1325 + cr_cont->ctl.crypt.crypt_offs = cpu_to_npe16(c_offs);
1326 + cr_cont->ctl.crypt.crypt_len = cpu_to_npe16(c_len);
1327 + if (sa_ctx->c_algo->iv_len) {
1328 + if (!iv) {
1329 + ret = -EINVAL;
1330 + goto err_cr;
1331 + }
1332 + memcpy(cr_cont->ctl.crypt.iv, iv,
1333 + sa_ctx->c_algo->iv_len);
1334 + }
1335 + }
1336 +
1337 + if (sa_ctx->h_algo) {
1338 + /* prepare hashing */
1339 + cr_cont->ctl.crypt.auth_offs = cpu_to_npe16(a_offs);
1340 + cr_cont->ctl.crypt.auth_len = cpu_to_npe16(a_len);
1341 + }
1342 +
1343 + data_phys = dma_map_single(sa_ctx->master->npe_dev,
1344 + data, datalen, DMA_BIDIRECTIONAL);
1345 + if (hmac)
1346 + cr_cont->ctl.crypt.addr.icv = cpu_to_npe32(data_phys + hmac);
1347 +
1348 + /* Prepare the data ptr */
1349 + cont = qmgr_get_cont(dev_get_drvdata(sa_ctx->master->sendq->dev));
1350 + if (!cont) {
1351 + goto err_unmap;
1352 + }
1353 +
1354 + cont->data = ptr;
1355 + cont->eth.next = 0;
1356 + cont->eth.buf_len = cpu_to_npe16(datalen);
1357 + cont->eth.pkt_len = 0;
1358 +
1359 + cont->eth.phys_addr = cpu_to_npe32(data_phys);
1360 + cr_cont->ctl.crypt.src_buf = cpu_to_npe32(cont->phys);
1361 +
1362 + atomic_inc(&sa_ctx->use_cnt);
1363 + queue_put_entry(sa_ctx->master->sendq, cr_cont->phys);
1364 + if (queue_stat(sa_ctx->master->sendq) != 2) {
1365 + return 0;
1366 + }
1367 +
1368 + /* overflow */
1369 + printk("%s: Overflow\n", __FUNCTION__);
1370 + ret = -EAGAIN;
1371 + atomic_dec(&sa_ctx->use_cnt);
1372 + qmgr_return_cont(dev_get_drvdata(sa_ctx->master->sendq->dev), cont);
1373 +
1374 +err_unmap:
1375 + dma_unmap_single(sa_ctx->master->npe_dev, data_phys, datalen,
1376 + DMA_BIDIRECTIONAL);
1377 +err_cr:
1378 + ix_sa_return_cont(sa_ctx->master, cr_cont);
1379 +
1380 + return ret;
1381 +}
1382 +
1383 +int ix_sa_ctx_setup_cipher_auth(struct ix_sa_ctx *sa_ctx,
1384 + const struct ix_cipher_algo *cipher,
1385 + const struct ix_hash_algo *auth, int len)
1386 +{
1387 + int ret = 0, sum = 0;
1388 + int cipher_op;
1389 +
1390 + if (sa_ctx->state != STATE_UNREGISTERED)
1391 + return -ENOENT;
1392 +
1393 + atomic_inc(&sa_ctx->use_cnt);
1394 +
1395 + cipher_op = auth ? OP_REGISTER : OP_REG_DONE;
1396 + if ((ret = ix_sa_ctx_setup_cipher(sa_ctx, cipher, OP_REGISTER, 1)) < 0)
1397 + goto out;
1398 + sum += ret;
1399 + if ((ret = ix_sa_ctx_setup_cipher(sa_ctx, cipher, cipher_op, 0)) < 0)
1400 + goto out;
1401 + sum += ret;
1402 + if ((ret = ix_sa_ctx_setup_auth(sa_ctx, auth, len, OP_REGISTER, 1)) < 0)
1403 + goto out;
1404 + sum += ret;
1405 + if ((ret = ix_sa_ctx_setup_auth(sa_ctx, auth, len, OP_REG_DONE, 0)) < 0)
1406 + goto out;
1407 + sum += ret;
1408 +
1409 + /* Nothing registered ?
1410 + * Ok, then we are done and call the callback here.
1411 + */
1412 + if (!sum) {
1413 + if (sa_ctx->state == STATE_UNREGISTERED)
1414 + sa_ctx->state = STATE_REGISTERED;
1415 + if (sa_ctx->reg_cb)
1416 + sa_ctx->reg_cb(sa_ctx, 0);
1417 + }
1418 +out:
1419 + atomic_dec(&sa_ctx->use_cnt);
1420 + return ret;
1421 +}
1422 +
1423 +static int __init init_crypto(void)
1424 +{
1425 + return init_sa_master(&sa_master);
1426 +}
1427 +
1428 +static void __exit finish_crypto(void)
1429 +{
1430 + release_sa_master(&sa_master);
1431 +}
1432 +
1433 +MODULE_LICENSE("GPL");
1434 +MODULE_AUTHOR("Christian Hohnstaedt <chohnstaedt@innominate.com>");
1435 +
1436 +EXPORT_SYMBOL(ix_hash_by_id);
1437 +EXPORT_SYMBOL(ix_cipher_by_id);
1438 +
1439 +EXPORT_SYMBOL(ix_sa_ctx_new);
1440 +EXPORT_SYMBOL(ix_sa_ctx_free);
1441 +EXPORT_SYMBOL(ix_sa_ctx_setup_cipher_auth);
1442 +EXPORT_SYMBOL(ix_sa_crypto_perform);
1443 +
1444 +module_init(init_crypto);
1445 +module_exit(finish_crypto);
1446 +
1447 Index: linux-2.6.21-rc1-arm/drivers/net/ixp4xx/ixp4xx_qmgr.c
1448 ===================================================================
1449 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
1450 +++ linux-2.6.21-rc1-arm/drivers/net/ixp4xx/ixp4xx_qmgr.c 2007-02-21 02:24:35.000000000 -0800
1451 @@ -0,0 +1,474 @@
1452 +/*
1453 + * qmgr.c - reimplementation of the queue configuration interface.
1454 + *
1455 + * Copyright (C) 2006 Christian Hohnstaedt <chohnstaedt@innominate.com>
1456 + *
1457 + * This file is released under the GPLv2
1458 + */
1459 +
1460 +#include <linux/kernel.h>
1461 +#include <linux/module.h>
1462 +#include <linux/platform_device.h>
1463 +#include <linux/fs.h>
1464 +#include <linux/init.h>
1465 +#include <linux/slab.h>
1466 +#include <linux/dmapool.h>
1467 +#include <linux/interrupt.h>
1468 +#include <linux/err.h>
1469 +#include <linux/delay.h>
1470 +#include <asm/uaccess.h>
1471 +#include <asm/io.h>
1472 +
1473 +#include <linux/ixp_qmgr.h>
1474 +#include <linux/ixp_npe.h>
1475 +
1476 +#define IXQMGR_VERSION "IXP4XX Q Manager 0.2.1"
1477 +
1478 +static struct device *qmgr_dev = NULL;
1479 +
1480 +static int poll_freq = 4000;
1481 +static int poll_enable = 0;
1482 +static u32 timer_countup_ticks;
1483 +
1484 +module_param(poll_freq, int, 0644);
1485 +module_param(poll_enable, int, 0644);
1486 +
1487 +int queue_len(struct qm_queue *queue)
1488 +{
1489 + struct qm_qmgr *qmgr = dev_get_drvdata(queue->dev);
1490 + int diff, offs;
1491 + u32 val;
1492 +
1493 + offs = queue->id/8 + QUE_LOW_STAT0;
1494 + val = *(qmgr->addr + IX_QMGR_QCFG_BASE + queue->id);
1495 +
1496 + diff = (val - (val >> 7)) & 0x7f;
1497 + if (!diff) {
1498 + /* diff == 0 means either empty or full, must look at STAT0 */
1499 + if ((*(qmgr->addr + offs) >> ((queue->id % 8)*4)) & 0x04)
1500 + diff = queue->len;
1501 + }
1502 + return diff;
1503 +}
1504 +
1505 +static int request_pool(struct device *dev, int count)
1506 +{
1507 + int i;
1508 + struct npe_cont *cont;
1509 + struct qm_qmgr *qmgr = dev_get_drvdata(dev);
1510 + dma_addr_t handle;
1511 +
1512 + for (i=0; i<count; i++) {
1513 + cont = dma_pool_alloc(qmgr->dmapool, GFP_KERNEL, &handle);
1514 + if (!cont) {
1515 + return -ENOMEM;
1516 + }
1517 + cont->phys = handle;
1518 + cont->virt = cont;
1519 + write_lock(&qmgr->lock);
1520 + cont->next = qmgr->pool;
1521 + qmgr->pool = cont;
1522 + write_unlock(&qmgr->lock);
1523 + }
1524 + return 0;
1525 +}
1526 +
1527 +static int free_pool(struct device *dev, int count)
1528 +{
1529 + int i;
1530 + struct npe_cont *cont;
1531 + struct qm_qmgr *qmgr = dev_get_drvdata(dev);
1532 +
1533 + for (i=0; i<count; i++) {
1534 + write_lock(&qmgr->lock);
1535 + cont = qmgr->pool;
1536 + if (!cont) {
1537 + write_unlock(&qmgr->lock);
1538 + return -1;
1539 + }
1540 + qmgr->pool = cont->next;
1541 + write_unlock(&qmgr->lock);
1542 + dma_pool_free(qmgr->dmapool, cont, cont->phys);
1543 + }
1544 + return 0;
1545 +}
1546 +
1547 +static int get_free_qspace(struct qm_qmgr *qmgr, int len)
1548 +{
1549 + int words = (qmgr->res->end - qmgr->res->start + 1) / 4 -
1550 + IX_QMGR_SRAM_SPACE;
1551 + int i,q;
1552 +
1553 + for (i=0; i<words; i+=len) {
1554 + for (q=0; q<MAX_QUEUES; q++) {
1555 + struct qm_queue *qu = qmgr->queues[q];
1556 + if (!qu)
1557 + continue;
1558 + if ((qu->addr + qu->len > i) && (qu->addr < i + len))
1559 + break;
1560 + }
1561 + if (q == MAX_QUEUES) {
1562 + /* we have a free address */
1563 + return i;
1564 + }
1565 + }
1566 + return -1;
1567 +}
1568 +
1569 +static inline int _log2(int x)
1570 +{
1571 + int r=0;
1572 + while(x>>=1)
1573 + r++;
1574 + return r;
1575 +}
1576 +
1577 +/*
1578 + * 32bit Config registers at IX_QMGR_QUECONFIG_BASE_OFFSET[Qid]
1579 + * 0 - 6 WRPTR Word offset to baseaddr (index 0 .. BSIZE-1)
1580 + * 7 -13 RDPTR ''
1581 + * 14 -21 BADDR baseaddr = (offset to IX_QMGR_QUEBUFFER_SPACE_OFFSET) >> 6
1582 + * 22 -23 ESIZE entrySizeInWords (always 00 because entrySizeInWords==1)
1583 + * 24 -25 BSIZE qSizeInWords 00=16,01=32,10=64,11=128
1584 + * 26 -28 NE nearly empty
1585 + * 29 -31 NF nearly full
1586 + */
1587 +static int conf_q_regs(struct qm_queue *queue)
1588 +{
1589 + int bsize = _log2(queue->len/16);
1590 + int baddr = queue->addr + IX_QMGR_QCFG_SIZE;
1591 +
1592 + /* +2, because baddr is in words and not in bytes */
1593 + queue_write_cfg_reg(queue, (bsize << 24) | (baddr<<(14-6+2)) );
1594 +
1595 + return 0;
1596 +}
1597 +
1598 +static void pmu_timer_restart(void)
1599 +{
1600 + unsigned long flags;
1601 +
1602 + local_irq_save(flags);
1603 +
1604 + __asm__(" mcr p14,0,%0,c1,c1,0\n" /* write current counter */
1605 + : : "r" (timer_countup_ticks));
1606 +
1607 + __asm__(" mrc p14,0,r1,c4,c1,0; " /* get int enable register */
1608 + " orr r1,r1,#1; "
1609 + " mcr p14,0,r1,c5,c1,0; " /* clear overflow */
1610 + " mcr p14,0,r1,c4,c1,0\n" /* enable interrupts */
1611 + : : : "r1");
1612 +
1613 + local_irq_restore(flags);
1614 +}
1615 +
1616 +static void pmu_timer_init(void)
1617 +{
1618 + u32 controlRegisterMask =
1619 + BIT(0) | /* enable counters */
1620 + BIT(2); /* reset clock counter; */
1621 +
1622 + /*
1623 + * Compute the number of xscale cycles needed between each
1624 + * PMU IRQ. This is done from the result of an OS calibration loop.
1625 + *
1626 + * For 533MHz CPU, 533000000 tick/s / 4000 times/sec = 138250
1627 + * 4000 times/sec = 37 mbufs/interrupt at line rate
1628 + * The pmu timer is reset to -138250 = 0xfffde3f6, to trigger an IRQ
1629 + * when this up counter overflows.
1630 + *
1631 + * The multiplication gives a number of instructions per second.
1632 + * which is close to the processor frequency, and then close to the
1633 + * PMU clock rate.
1634 + *
1635 + * 2 is the number of instructions per loop
1636 + *
1637 + */
1638 +
1639 + timer_countup_ticks = - ((loops_per_jiffy * HZ * 2) / poll_freq);
1640 +
1641 + /* enable the CCNT (clock count) timer from the PMU */
1642 + __asm__(" mcr p14,0,%0,c0,c1,0\n"
1643 + : : "r" (controlRegisterMask));
1644 +}
1645 +
1646 +static void pmu_timer_disable(void)
1647 +{
1648 + unsigned long flags;
1649 +
1650 + local_irq_save(flags);
1651 +
1652 + __asm__(" mrc p14,0,r1,c4,c1,0; " /* get int enable register */
1653 + " and r1,r1,#0x1e; "
1654 + " mcr p14,0,r1,c4,c1,0\n" /* disable interrupts */
1655 + : : : "r1");
1656 + local_irq_restore(flags);
1657 +}
1658 +
1659 +void queue_set_watermarks(struct qm_queue *queue, unsigned ne, unsigned nf)
1660 +{
1661 + u32 val;
1662 + /* calculate the register values
1663 + * 0->0, 1->1, 2->2, 4->3, 8->4 16->5...*/
1664 + ne = _log2(ne<<1) & 0x7;
1665 + nf = _log2(nf<<1) & 0x7;
1666 +
1667 + /* Mask out old watermarks */
1668 + val = queue_read_cfg_reg(queue) & ~0xfc000000;
1669 + queue_write_cfg_reg(queue, val | (ne << 26) | (nf << 29));
1670 +}
1671 +
1672 +int queue_set_irq_src(struct qm_queue *queue, int flag)
1673 +{
1674 + struct qm_qmgr *qmgr = dev_get_drvdata(queue->dev);
1675 + u32 reg;
1676 + int offs, bitoffs;
1677 +
1678 + /* Q 0-7 are in REG0, 8-15 are in REG1, etc. They occupy 4 bits/Q */
1679 + offs = queue->id/8 + INT0_SRC_SELREG0;
1680 + bitoffs = (queue->id % 8)*4;
1681 +
1682 + reg = *(qmgr->addr + offs) & ~(0xf << bitoffs);
1683 + *(qmgr->addr + offs) = reg | (flag << bitoffs);
1684 +
1685 + return 0;
1686 +}
1687 +
1688 +static irqreturn_t irq_qm1(int irq, void *dev_id)
1689 +{
1690 + struct qm_qmgr *qmgr = dev_id;
1691 + int offs, reg;
1692 + struct qm_queue *queue;
1693 +
1694 + if (poll_enable)
1695 + pmu_timer_restart();
1696 +
1697 + reg = *(qmgr->addr + QUE_INT_REG0);
1698 + while(reg) {
1699 + /*
1700 + * count leading zeros. "offs" gets
1701 + * the amount of leading 0 in "reg"
1702 + */
1703 + asm ("clz %0, %1;" : "=r"(offs) : "r"(reg));
1704 + offs = 31 - offs;
1705 + reg &= ~(1 << offs);
1706 + queue = qmgr->queues[offs];
1707 + if (likely(queue)) {
1708 + if (likely(queue->irq_cb)) {
1709 + queue->irq_cb(queue);
1710 + } else {
1711 + printk(KERN_ERR "Missing callback for Q %d\n",
1712 + offs);
1713 + }
1714 + } else {
1715 + printk(KERN_ERR "IRQ for unregistered Q %d\n", offs);
1716 + }
1717 + }
1718 + return IRQ_HANDLED;
1719 +}
1720 +
1721 +struct qm_queue *request_queue(int qid, int len)
1722 +{
1723 + int ram;
1724 + struct qm_qmgr *qmgr;
1725 + struct qm_queue *queue;
1726 +
1727 + if (!qmgr_dev)
1728 + return ERR_PTR(-ENODEV);
1729 +
1730 + if ((qid < 0) || (qid > MAX_QUEUES))
1731 + return ERR_PTR(-ERANGE);
1732 +
1733 + switch (len) {
1734 + case 16:
1735 + case 32:
1736 + case 64:
1737 + case 128: break;
1738 + default : return ERR_PTR(-EINVAL);
1739 + }
1740 +
1741 + qmgr = dev_get_drvdata(qmgr_dev);
1742 +
1743 + if (qmgr->queues[qid]) {
1744 + /* not an error, just in use already */
1745 + return NULL;
1746 + }
1747 + if ((ram = get_free_qspace(qmgr, len)) < 0) {
1748 + printk(KERN_ERR "No free SRAM space for this queue\n");
1749 + return ERR_PTR(-ENOMEM);
1750 + }
1751 + if (!(queue = kzalloc(sizeof(struct qm_queue), GFP_KERNEL)))
1752 + return ERR_PTR(-ENOMEM);
1753 +
1754 + if (!try_module_get(THIS_MODULE)) {
1755 + kfree(queue);
1756 + return ERR_PTR(-ENODEV);
1757 + }
1758 +
1759 + queue->addr = ram;
1760 + queue->len = len;
1761 + queue->id = qid;
1762 + queue->dev = get_device(qmgr_dev);
1763 + queue->acc_reg = qmgr->addr + (4 * qid);
1764 + qmgr->queues[qid] = queue;
1765 + if (request_pool(qmgr_dev, len)) {
1766 + printk(KERN_ERR "Failed to request DMA pool of Q %d\n", qid);
1767 + }
1768 +
1769 + conf_q_regs(queue);
1770 + return queue;
1771 +}
1772 +
1773 +void release_queue(struct qm_queue *queue)
1774 +{
1775 + struct qm_qmgr *qmgr = dev_get_drvdata(queue->dev);
1776 +
1777 + BUG_ON(qmgr->queues[queue->id] != queue);
1778 + qmgr->queues[queue->id] = NULL;
1779 +
1780 + if (free_pool(queue->dev, queue->len)) {
1781 + printk(KERN_ERR "Failed to release DMA pool of Q %d\n",
1782 + queue->id);
1783 + }
1784 + queue_disable_irq(queue);
1785 + queue_write_cfg_reg(queue, 0);
1786 +
1787 + module_put(THIS_MODULE);
1788 + put_device(queue->dev);
1789 + kfree(queue);
1790 +}
1791 +
1792 +
1793 +
1794 +
1795 +static int qmgr_probe(struct platform_device *pdev)
1796 +{
1797 + struct resource *res;
1798 + struct qm_qmgr *qmgr;
1799 + int size, ret=0, i;
1800 +
1801 + if (!(res = platform_get_resource(pdev, IORESOURCE_MEM, 0)))
1802 + return -EIO;
1803 +
1804 + if ((i = platform_get_irq(pdev, 0)) < 0)
1805 + return -EIO;
1806 +
1807 + if (!(qmgr = kzalloc(sizeof(struct qm_qmgr), GFP_KERNEL)))
1808 + return -ENOMEM;
1809 +
1810 + qmgr->irq = i;
1811 + size = res->end - res->start +1;
1812 + qmgr->res = request_mem_region(res->start, size, "ixp_qmgr");
1813 + if (!qmgr->res) {
1814 + ret = -EBUSY;
1815 + goto out_free;
1816 + }
1817 +
1818 + qmgr->addr = ioremap(res->start, size);
1819 + if (!qmgr->addr) {
1820 + ret = -ENOMEM;
1821 + goto out_rel;
1822 + }
1823 +
1824 + /* Reset Q registers */
1825 + for (i=0; i<4; i++)
1826 + *(qmgr->addr + QUE_LOW_STAT0 +i) = 0x33333333;
1827 + for (i=0; i<10; i++)
1828 + *(qmgr->addr + QUE_UO_STAT0 +i) = 0x0;
1829 + for (i=0; i<4; i++)
1830 + *(qmgr->addr + INT0_SRC_SELREG0 +i) = 0x0;
1831 + for (i=0; i<2; i++) {
1832 + *(qmgr->addr + QUE_IE_REG0 +i) = 0x00;
1833 + *(qmgr->addr + QUE_INT_REG0 +i) = 0xffffffff;
1834 + }
1835 + for (i=0; i<64; i++) {
1836 + *(qmgr->addr + IX_QMGR_QCFG_BASE + i) = 0x0;
1837 + }
1838 +
1839 + if (poll_enable) {
1840 + pmu_timer_init();
1841 + qmgr->irq = IRQ_IXP4XX_XSCALE_PMU;
1842 + }
1843 + ret = request_irq(qmgr->irq, irq_qm1, SA_SHIRQ | SA_INTERRUPT,
1844 + "qmgr", qmgr);
1845 + if (ret) {
1846 + printk(KERN_ERR "Failed to request IRQ(%d)\n", qmgr->irq);
1847 + ret = -EIO;
1848 + goto out_rel;
1849 + }
1850 + if (poll_enable)
1851 + pmu_timer_restart();
1852 +
1853 + rwlock_init(&qmgr->lock);
1854 + qmgr->dmapool = dma_pool_create("qmgr", &pdev->dev,
1855 + sizeof(struct npe_cont), 32, 0);
1856 + platform_set_drvdata(pdev, qmgr);
1857 +
1858 + qmgr_dev = &pdev->dev;
1859 +
1860 + printk(KERN_INFO IXQMGR_VERSION " initialized.\n");
1861 +
1862 + return 0;
1863 +
1864 +out_rel:
1865 + release_resource(qmgr->res);
1866 +out_free:
1867 + kfree(qmgr);
1868 + return ret;
1869 +}
1870 +
1871 +static int qmgr_remove(struct platform_device *pdev)
1872 +{
1873 + struct qm_qmgr *qmgr = platform_get_drvdata(pdev);
1874 + int i;
1875 +
1876 + for (i=0; i<MAX_QUEUES; i++) {
1877 + if (qmgr->queues[i]) {
1878 + printk(KERN_ERR "WARNING Unreleased Q: %d\n", i);
1879 + release_queue(qmgr->queues[i]);
1880 + }
1881 + }
1882 +
1883 + if (poll_enable)
1884 + pmu_timer_disable();
1885 +
1886 + synchronize_irq (qmgr->irq);
1887 + free_irq(qmgr->irq, qmgr);
1888 +
1889 + dma_pool_destroy(qmgr->dmapool);
1890 + iounmap(qmgr->addr);
1891 + release_resource(qmgr->res);
1892 + platform_set_drvdata(pdev, NULL);
1893 + qmgr_dev = NULL;
1894 + kfree(qmgr);
1895 + return 0;
1896 +}
1897 +
1898 +static struct platform_driver ixp4xx_qmgr = {
1899 + .driver.name = "ixp4xx_qmgr",
1900 + .probe = qmgr_probe,
1901 + .remove = qmgr_remove,
1902 +};
1903 +
1904 +
1905 +static int __init init_qmgr(void)
1906 +{
1907 + return platform_driver_register(&ixp4xx_qmgr);
1908 +}
1909 +
1910 +static void __exit finish_qmgr(void)
1911 +{
1912 + platform_driver_unregister(&ixp4xx_qmgr);
1913 +}
1914 +
1915 +module_init(init_qmgr);
1916 +module_exit(finish_qmgr);
1917 +
1918 +MODULE_LICENSE("GPL");
1919 +MODULE_AUTHOR("Christian Hohnstaedt <chohnstaedt@innominate.com>");
1920 +
1921 +EXPORT_SYMBOL(request_queue);
1922 +EXPORT_SYMBOL(release_queue);
1923 +EXPORT_SYMBOL(queue_set_irq_src);
1924 +EXPORT_SYMBOL(queue_set_watermarks);
1925 +EXPORT_SYMBOL(queue_len);
1926 Index: linux-2.6.21-rc1-arm/drivers/net/ixp4xx/mac.h
1927 ===================================================================
1928 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
1929 +++ linux-2.6.21-rc1-arm/drivers/net/ixp4xx/mac.h 2007-02-21 02:24:35.000000000 -0800
1930 @@ -0,0 +1,275 @@
1931 +/*
1932 + * Copyright (C) 2002-2006 Christian Hohnstaedt <chohnstaedt@innominate.com>
1933 + *
1934 + * This file is released under the GPLv2
1935 + */
1936 +
1937 +#include <linux/resource.h>
1938 +#include <linux/netdevice.h>
1939 +#include <linux/io.h>
1940 +#include <linux/mii.h>
1941 +#include <linux/workqueue.h>
1942 +#include <asm/hardware.h>
1943 +#include <linux/ixp_qmgr.h>
1944 +
1945 +/* 32 bit offsets to be added to u32 *pointers */
1946 +#define MAC_TX_CNTRL1 0x00 // 0x000
1947 +#define MAC_TX_CNTRL2 0x01 // 0x004
1948 +#define MAC_RX_CNTRL1 0x04 // 0x010
1949 +#define MAC_RX_CNTRL2 0x05 // 0x014
1950 +#define MAC_RANDOM_SEED 0x08 // 0x020
1951 +#define MAC_THRESH_P_EMPTY 0x0c // 0x030
1952 +#define MAC_THRESH_P_FULL 0x0e // 0x038
1953 +#define MAC_BUF_SIZE_TX 0x10 // 0x040
1954 +#define MAC_TX_DEFER 0x14 // 0x050
1955 +#define MAC_RX_DEFER 0x15 // 0x054
1956 +#define MAC_TX_TWO_DEFER_1 0x18 // 0x060
1957 +#define MAC_TX_TWO_DEFER_2 0x19 // 0x064
1958 +#define MAC_SLOT_TIME 0x1c // 0x070
1959 +#define MAC_MDIO_CMD 0x20 // 0x080 4 registers 0x20 - 0x23
1960 +#define MAC_MDIO_STS 0x24 // 0x090 4 registers 0x24 - 0x27
1961 +#define MAC_ADDR_MASK 0x28 // 0x0A0 6 registers 0x28 - 0x2d
1962 +#define MAC_ADDR 0x30 // 0x0C0 6 registers 0x30 - 0x35
1963 +#define MAC_INT_CLK_THRESH 0x38 // 0x0E0 1 register
1964 +#define MAC_UNI_ADDR 0x3c // 0x0F0 6 registers 0x3c - 0x41
1965 +#define MAC_CORE_CNTRL 0x7f // 0x1fC
1966 +
1967 +/* TX Control Register 1*/
1968 +
1969 +#define TX_CNTRL1_TX_EN BIT(0)
1970 +#define TX_CNTRL1_DUPLEX BIT(1)
1971 +#define TX_CNTRL1_RETRY BIT(2)
1972 +#define TX_CNTRL1_PAD_EN BIT(3)
1973 +#define TX_CNTRL1_FCS_EN BIT(4)
1974 +#define TX_CNTRL1_2DEFER BIT(5)
1975 +#define TX_CNTRL1_RMII BIT(6)
1976 +
1977 +/* TX Control Register 2 */
1978 +#define TX_CNTRL2_RETRIES_MASK 0xf
1979 +
1980 +/* RX Control Register 1 */
1981 +#define RX_CNTRL1_RX_EN BIT(0)
1982 +#define RX_CNTRL1_PADSTRIP_EN BIT(1)
1983 +#define RX_CNTRL1_CRC_EN BIT(2)
1984 +#define RX_CNTRL1_PAUSE_EN BIT(3)
1985 +#define RX_CNTRL1_LOOP_EN BIT(4)
1986 +#define RX_CNTRL1_ADDR_FLTR_EN BIT(5)
1987 +#define RX_CNTRL1_RX_RUNT_EN BIT(6)
1988 +#define RX_CNTRL1_BCAST_DIS BIT(7)
1989 +
1990 +/* RX Control Register 2 */
1991 +#define RX_CNTRL2_DEFER_EN BIT(0)
1992 +
1993 +/* Core Control Register */
1994 +#define CORE_RESET BIT(0)
1995 +#define CORE_RX_FIFO_FLUSH BIT(1)
1996 +#define CORE_TX_FIFO_FLUSH BIT(2)
1997 +#define CORE_SEND_JAM BIT(3)
1998 +#define CORE_MDC_EN BIT(4)
1999 +
2000 +/* Definitions for MII access routines*/
2001 +
2002 +#define MII_REG_SHL 16
2003 +#define MII_ADDR_SHL 21
2004 +
2005 +#define MII_GO BIT(31)
2006 +#define MII_WRITE BIT(26)
2007 +#define MII_READ_FAIL BIT(31)
2008 +
2009 +#define MII_TIMEOUT_10TH_SECS 5
2010 +#define MII_10TH_SEC_IN_MILLIS 100
2011 +
2012 +/*
2013 + *
2014 + * Default values
2015 + *
2016 + */
2017 +
2018 +#define MAC_DEF_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK)
2019 +
2020 +#define MAC_TX_CNTRL1_DEFAULT (\
2021 + TX_CNTRL1_TX_EN | \
2022 + TX_CNTRL1_RETRY | \
2023 + TX_CNTRL1_FCS_EN | \
2024 + TX_CNTRL1_2DEFER | \
2025 + TX_CNTRL1_PAD_EN )
2026 +
2027 +#define MAC_TX_MAX_RETRIES_DEFAULT 0x0f
2028 +
2029 +#define MAC_RX_CNTRL1_DEFAULT ( \
2030 + RX_CNTRL1_PADSTRIP_EN | \
2031 + RX_CNTRL1_CRC_EN | \
2032 + RX_CNTRL1_RX_EN )
2033 +
2034 +#define MAC_RX_CNTRL2_DEFAULT 0x0
2035 +#define MAC_TX_CNTRL2_DEFAULT TX_CNTRL2_RETRIES_MASK
2036 +
2037 +/* Thresholds determined by NPE firmware FS */
2038 +#define MAC_THRESH_P_EMPTY_DEFAULT 0x12
2039 +#define MAC_THRESH_P_FULL_DEFAULT 0x30
2040 +
2041 +/* Number of bytes that must be in the tx fifo before
2042 + * transmission commences */
2043 +#define MAC_BUF_SIZE_TX_DEFAULT 0x8
2044 +
2045 +/* One-part deferral values */
2046 +#define MAC_TX_DEFER_DEFAULT 0x15
2047 +#define MAC_RX_DEFER_DEFAULT 0x16
2048 +
2049 +/* Two-part deferral values... */
2050 +#define MAC_TX_TWO_DEFER_1_DEFAULT 0x08
2051 +#define MAC_TX_TWO_DEFER_2_DEFAULT 0x07
2052 +
2053 +/* This value applies to MII */
2054 +#define MAC_SLOT_TIME_DEFAULT 0x80
2055 +
2056 +/* This value applies to RMII */
2057 +#define MAC_SLOT_TIME_RMII_DEFAULT 0xFF
2058 +
2059 +#define MAC_ADDR_MASK_DEFAULT 0xFF
2060 +
2061 +#define MAC_INT_CLK_THRESH_DEFAULT 0x1
2062 +/* The following is a value chosen at random */
2063 +#define MAC_RANDOM_SEED_DEFAULT 0x8
2064 +
2065 +/* By default we must configure the MAC to generate the MDC clock*/
2066 +#define CORE_DEFAULT (CORE_MDC_EN)
2067 +
2068 +/* End of Intel provided register information */
2069 +
2070 +extern int
2071 +mdio_read_register(struct net_device *dev, int phy_addr, int phy_reg);
2072 +extern void
2073 +mdio_write_register(struct net_device *dev, int phy_addr, int phy_reg, int val);
2074 +extern void init_mdio(struct net_device *dev, int phy_id);
2075 +
2076 +struct mac_info {
2077 + u32 __iomem *addr;
2078 + struct resource *res;
2079 + struct device *npe_dev;
2080 + struct net_device *netdev;
2081 + struct qm_qmgr *qmgr;
2082 + struct qm_queue *rxq;
2083 + struct qm_queue *txq;
2084 + struct qm_queue *rxdoneq;
2085 + u32 irqflags;
2086 + struct net_device_stats stat;
2087 + struct mii_if_info mii;
2088 + struct delayed_work mdio_thread;
2089 + int rxq_pkt;
2090 + int txq_pkt;
2091 + int unloading;
2092 + struct mac_plat_info *plat;
2093 + int npe_stat_num;
2094 + spinlock_t rx_lock;
2095 + u32 msg_enable;
2096 +};
2097 +
2098 +static inline void mac_write_reg(struct mac_info *mac, int offset, u32 val)
2099 +{
2100 + *(mac->addr + offset) = val;
2101 +}
2102 +static inline u32 mac_read_reg(struct mac_info *mac, int offset)
2103 +{
2104 + return *(mac->addr + offset);
2105 +}
2106 +static inline void mac_set_regbit(struct mac_info *mac, int offset, u32 bit)
2107 +{
2108 + mac_write_reg(mac, offset, mac_read_reg(mac, offset) | bit);
2109 +}
2110 +static inline void mac_reset_regbit(struct mac_info *mac, int offset, u32 bit)
2111 +{
2112 + mac_write_reg(mac, offset, mac_read_reg(mac, offset) & ~bit);
2113 +}
2114 +
2115 +static inline void mac_mdio_cmd_write(struct mac_info *mac, u32 cmd)
2116 +{
2117 + int i;
2118 + for(i=0; i<4; i++) {
2119 + mac_write_reg(mac, MAC_MDIO_CMD + i, cmd & 0xff);
2120 + cmd >>=8;
2121 + }
2122 +}
2123 +
2124 +#define mac_mdio_cmd_read(mac) mac_mdio_read((mac), MAC_MDIO_CMD)
2125 +#define mac_mdio_status_read(mac) mac_mdio_read((mac), MAC_MDIO_STS)
2126 +static inline u32 mac_mdio_read(struct mac_info *mac, int offset)
2127 +{
2128 + int i;
2129 + u32 data = 0;
2130 + for(i=0; i<4; i++) {
2131 + data |= (mac_read_reg(mac, offset + i) & 0xff) << (i*8);
2132 + }
2133 + return data;
2134 +}
2135 +
2136 +static inline u32 mdio_cmd(int phy_addr, int phy_reg)
2137 +{
2138 + return phy_addr << MII_ADDR_SHL |
2139 + phy_reg << MII_REG_SHL |
2140 + MII_GO;
2141 +}
2142 +
2143 +#define MAC_REG_LIST { \
2144 + MAC_TX_CNTRL1, MAC_TX_CNTRL2, \
2145 + MAC_RX_CNTRL1, MAC_RX_CNTRL2, \
2146 + MAC_RANDOM_SEED, MAC_THRESH_P_EMPTY, MAC_THRESH_P_FULL, \
2147 + MAC_BUF_SIZE_TX, MAC_TX_DEFER, MAC_RX_DEFER, \
2148 + MAC_TX_TWO_DEFER_1, MAC_TX_TWO_DEFER_2, MAC_SLOT_TIME, \
2149 + MAC_ADDR_MASK +0, MAC_ADDR_MASK +1, MAC_ADDR_MASK +2, \
2150 + MAC_ADDR_MASK +3, MAC_ADDR_MASK +4, MAC_ADDR_MASK +5, \
2151 + MAC_ADDR +0, MAC_ADDR +1, MAC_ADDR +2, \
2152 + MAC_ADDR +3, MAC_ADDR +4, MAC_ADDR +5, \
2153 + MAC_INT_CLK_THRESH, \
2154 + MAC_UNI_ADDR +0, MAC_UNI_ADDR +1, MAC_UNI_ADDR +2, \
2155 + MAC_UNI_ADDR +3, MAC_UNI_ADDR +4, MAC_UNI_ADDR +5, \
2156 + MAC_CORE_CNTRL \
2157 +}
2158 +
2159 +#define NPE_STAT_NUM 34
2160 +#define NPE_STAT_NUM_BASE 22
2161 +#define NPE_Q_STAT_NUM 4
2162 +
2163 +#define NPE_Q_STAT_STRINGS \
2164 + {"RX ready to use queue len "}, \
2165 + {"RX received queue len "}, \
2166 + {"TX to be send queue len "}, \
2167 + {"TX done queue len "},
2168 +
2169 +#define NPE_STAT_STRINGS \
2170 + {"StatsAlignmentErrors "}, \
2171 + {"StatsFCSErrors "}, \
2172 + {"StatsInternalMacReceiveErrors "}, \
2173 + {"RxOverrunDiscards "}, \
2174 + {"RxLearnedEntryDiscards "}, \
2175 + {"RxLargeFramesDiscards "}, \
2176 + {"RxSTPBlockedDiscards "}, \
2177 + {"RxVLANTypeFilterDiscards "}, \
2178 + {"RxVLANIdFilterDiscards "}, \
2179 + {"RxInvalidSourceDiscards "}, \
2180 + {"RxBlackListDiscards "}, \
2181 + {"RxWhiteListDiscards "}, \
2182 + {"RxUnderflowEntryDiscards "}, \
2183 + {"StatsSingleCollisionFrames "}, \
2184 + {"StatsMultipleCollisionFrames "}, \
2185 + {"StatsDeferredTransmissions "}, \
2186 + {"StatsLateCollisions "}, \
2187 + {"StatsExcessiveCollsions "}, \
2188 + {"StatsInternalMacTransmitErrors"}, \
2189 + {"StatsCarrierSenseErrors "}, \
2190 + {"TxLargeFrameDiscards "}, \
2191 + {"TxVLANIdFilterDiscards "}, \
2192 +\
2193 + {"RxValidFramesTotalOctets "}, \
2194 + {"RxUcastPkts "}, \
2195 + {"RxBcastPkts "}, \
2196 + {"RxMcastPkts "}, \
2197 + {"RxPkts64Octets "}, \
2198 + {"RxPkts65to127Octets "}, \
2199 + {"RxPkts128to255Octets "}, \
2200 + {"RxPkts256to511Octets "}, \
2201 + {"RxPkts512to1023Octets "}, \
2202 + {"RxPkts1024to1518Octets "}, \
2203 + {"RxInternalNPEReceiveErrors "}, \
2204 + {"TxInternalNPETransmitErrors "}
2205 +
2206 Index: linux-2.6.21-rc1-arm/drivers/net/ixp4xx/mac_driver.c
2207 ===================================================================
2208 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
2209 +++ linux-2.6.21-rc1-arm/drivers/net/ixp4xx/mac_driver.c 2007-02-21 02:24:46.000000000 -0800
2210 @@ -0,0 +1,850 @@
2211 +/*
2212 + * mac_driver.c - provide a network interface for each MAC
2213 + *
2214 + * Copyright (C) 2006 Christian Hohnstaedt <chohnstaedt@innominate.com>
2215 + *
2216 + * This file is released under the GPLv2
2217 + */
2218 +
2219 +#include <linux/kernel.h>
2220 +#include <linux/module.h>
2221 +#include <linux/platform_device.h>
2222 +#include <linux/netdevice.h>
2223 +#include <linux/etherdevice.h>
2224 +#include <linux/ethtool.h>
2225 +#include <linux/slab.h>
2226 +#include <linux/delay.h>
2227 +#include <linux/err.h>
2228 +#include <linux/dma-mapping.h>
2229 +#include <linux/workqueue.h>
2230 +#include <asm/io.h>
2231 +#include <asm/irq.h>
2232 +
2233 +
2234 +#include <linux/ixp_qmgr.h>
2235 +#include <linux/ixp_npe.h>
2236 +#include "mac.h"
2237 +
2238 +#define MDIO_INTERVAL (3*HZ)
2239 +#define RX_QUEUE_PREFILL 64
2240 +#define TX_QUEUE_PREFILL 16
2241 +
2242 +#define IXMAC_NAME "ixp4xx_mac"
2243 +#define IXMAC_VERSION "0.3.1"
2244 +
2245 +#define MAC_DEFAULT_REG(mac, name) \
2246 + mac_write_reg(mac, MAC_ ## name, MAC_ ## name ## _DEFAULT)
2247 +
2248 +#define TX_DONE_QID 31
2249 +
2250 +#define DMA_ALLOC_SIZE 2048
2251 +#define DMA_HDR_SIZE (sizeof(struct npe_cont))
2252 +#define DMA_BUF_SIZE (DMA_ALLOC_SIZE - DMA_HDR_SIZE)
2253 +
2254 +/* Since the NPEs use 1 Return Q for sent frames, we need a device
2255 + * independent return Q. We call it tx_doneq.
2256 + * It will be initialized during module load and uninitialized
2257 + * during module unload. Evil hack, but there is no choice :-(
2258 + */
2259 +
2260 +static struct qm_queue *tx_doneq = NULL;
2261 +static int debug = -1;
2262 +module_param(debug, int, 0);
2263 +
2264 +static int init_buffer(struct qm_queue *queue, int count)
2265 +{
2266 + int i;
2267 + struct npe_cont *cont;
2268 +
2269 + for (i=0; i<count; i++) {
2270 + cont = kmalloc(DMA_ALLOC_SIZE, GFP_KERNEL | GFP_DMA);
2271 + if (!cont)
2272 + goto err;
2273 +
2274 + cont->phys = dma_map_single(queue->dev, cont, DMA_ALLOC_SIZE,
2275 + DMA_BIDIRECTIONAL);
2276 + if (dma_mapping_error(cont->phys))
2277 + goto err;
2278 +
2279 + cont->data = cont+1;
2280 + /* now the buffer is on a 32 bit boundary.
2281 + * we add 2 bytes for good alignment to SKB */
2282 + cont->data+=2;
2283 + cont->eth.next = 0;
2284 + cont->eth.buf_len = cpu_to_npe16(DMA_BUF_SIZE);
2285 + cont->eth.pkt_len = 0;
2286 + /* also add 2 alignment bytes from cont->data*/
2287 + cont->eth.phys_addr = cpu_to_npe32(cont->phys+ DMA_HDR_SIZE+ 2);
2288 +
2289 + dma_sync_single(queue->dev, cont->phys, DMA_HDR_SIZE,
2290 + DMA_TO_DEVICE);
2291 +
2292 + queue_put_entry(queue, cont->phys);
2293 + if (queue_stat(queue) == 2) { /* overflow */
2294 + dma_unmap_single(queue->dev, cont->phys, DMA_ALLOC_SIZE,
2295 + DMA_BIDIRECTIONAL);
2296 + goto err;
2297 + }
2298 + }
2299 + return i;
2300 +err:
2301 + if (cont)
2302 + kfree(cont);
2303 + return i;
2304 +}
2305 +
2306 +static int destroy_buffer(struct qm_queue *queue, int count)
2307 +{
2308 + u32 phys;
2309 + int i;
2310 + struct npe_cont *cont;
2311 +
2312 + for (i=0; i<count; i++) {
2313 + phys = queue_get_entry(queue) & ~0xf;
2314 + if (!phys)
2315 + break;
2316 + dma_unmap_single(queue->dev, phys, DMA_ALLOC_SIZE,
2317 + DMA_BIDIRECTIONAL);
2318 + cont = dma_to_virt(queue->dev, phys);
2319 + kfree(cont);
2320 + }
2321 + return i;
2322 +}
2323 +
2324 +static void mac_init(struct mac_info *mac)
2325 +{
2326 + MAC_DEFAULT_REG(mac, TX_CNTRL2);
2327 + MAC_DEFAULT_REG(mac, RANDOM_SEED);
2328 + MAC_DEFAULT_REG(mac, THRESH_P_EMPTY);
2329 + MAC_DEFAULT_REG(mac, THRESH_P_FULL);
2330 + MAC_DEFAULT_REG(mac, TX_DEFER);
2331 + MAC_DEFAULT_REG(mac, TX_TWO_DEFER_1);
2332 + MAC_DEFAULT_REG(mac, TX_TWO_DEFER_2);
2333 + MAC_DEFAULT_REG(mac, SLOT_TIME);
2334 + MAC_DEFAULT_REG(mac, INT_CLK_THRESH);
2335 + MAC_DEFAULT_REG(mac, BUF_SIZE_TX);
2336 + MAC_DEFAULT_REG(mac, TX_CNTRL1);
2337 + MAC_DEFAULT_REG(mac, RX_CNTRL1);
2338 +}
2339 +
2340 +static void mac_set_uniaddr(struct net_device *dev)
2341 +{
2342 + int i;
2343 + struct mac_info *mac = netdev_priv(dev);
2344 + struct npe_info *npe = dev_get_drvdata(mac->npe_dev);
2345 +
2346 + /* check for multicast */
2347 + if (dev->dev_addr[0] & 1)
2348 + return;
2349 +
2350 + npe_mh_setportaddr(npe, mac->plat, dev->dev_addr);
2351 + npe_mh_disable_firewall(npe, mac->plat);
2352 + for (i=0; i<dev->addr_len; i++)
2353 + mac_write_reg(mac, MAC_UNI_ADDR + i, dev->dev_addr[i]);
2354 +}
2355 +
2356 +static void update_duplex_mode(struct net_device *dev)
2357 +{
2358 + struct mac_info *mac = netdev_priv(dev);
2359 + if (netif_msg_link(mac)) {
2360 + printk(KERN_DEBUG "Link of %s is %s-duplex\n", dev->name,
2361 + mac->mii.full_duplex ? "full" : "half");
2362 + }
2363 + if (mac->mii.full_duplex) {
2364 + mac_reset_regbit(mac, MAC_TX_CNTRL1, TX_CNTRL1_DUPLEX);
2365 + } else {
2366 + mac_set_regbit(mac, MAC_TX_CNTRL1, TX_CNTRL1_DUPLEX);
2367 + }
2368 +}
2369 +
2370 +static int media_check(struct net_device *dev, int init)
2371 +{
2372 + struct mac_info *mac = netdev_priv(dev);
2373 +
2374 + if (mii_check_media(&mac->mii, netif_msg_link(mac), init)) {
2375 + update_duplex_mode(dev);
2376 + return 1;
2377 + }
2378 + return 0;
2379 +}
2380 +
2381 +static void get_npe_stats(struct mac_info *mac, u32 *buf, int len, int reset)
2382 +{
2383 + struct npe_info *npe = dev_get_drvdata(mac->npe_dev);
2384 + u32 phys;
2385 +
2386 + memset(buf, len, 0);
2387 + phys = dma_map_single(mac->npe_dev, buf, len, DMA_BIDIRECTIONAL);
2388 + npe_mh_get_stats(npe, mac->plat, phys, reset);
2389 + dma_unmap_single(mac->npe_dev, phys, len, DMA_BIDIRECTIONAL);
2390 +}
2391 +
2392 +static void irqcb_recv(struct qm_queue *queue)
2393 +{
2394 + struct net_device *dev = queue->cb_data;
2395 +
2396 + queue_ack_irq(queue);
2397 + queue_disable_irq(queue);
2398 + if (netif_running(dev))
2399 + netif_rx_schedule(dev);
2400 +}
2401 +
2402 +int ix_recv(struct net_device *dev, int *budget, struct qm_queue *queue)
2403 +{
2404 + struct mac_info *mac = netdev_priv(dev);
2405 + struct sk_buff *skb;
2406 + u32 phys;
2407 + struct npe_cont *cont;
2408 +
2409 + while (*budget > 0 && netif_running(dev) ) {
2410 + int len;
2411 + phys = queue_get_entry(queue) & ~0xf;
2412 + if (!phys)
2413 + break;
2414 + dma_sync_single(queue->dev, phys, DMA_HDR_SIZE,
2415 + DMA_FROM_DEVICE);
2416 + cont = dma_to_virt(queue->dev, phys);
2417 + len = npe_to_cpu16(cont->eth.pkt_len) -4; /* strip FCS */
2418 +
2419 + if (unlikely(netif_msg_rx_status(mac))) {
2420 + printk(KERN_DEBUG "%s: RX packet size: %u\n",
2421 + dev->name, len);
2422 + queue_state(mac->rxq);
2423 + queue_state(mac->rxdoneq);
2424 + }
2425 + skb = dev_alloc_skb(len + 2);
2426 + if (likely(skb)) {
2427 + skb->dev = dev;
2428 + skb_reserve(skb, 2);
2429 + dma_sync_single(queue->dev, cont->eth.phys_addr, len,
2430 + DMA_FROM_DEVICE);
2431 +#ifdef CONFIG_NPE_ADDRESS_COHERENT
2432 + /* swap the payload of the SKB */
2433 + {
2434 + u32 *t = (u32*)(skb->data-2);
2435 + u32 *s = (u32*)(cont->data-2);
2436 + int i, j = (len+5)/4;
2437 + for (i=0; i<j; i++)
2438 + t[i] = cpu_to_be32(s[i]);
2439 + }
2440 +#else
2441 + eth_copy_and_sum(skb, cont->data, len, 0);
2442 +#endif
2443 + skb_put(skb, len);
2444 + skb->protocol = eth_type_trans(skb, dev);
2445 + dev->last_rx = jiffies;
2446 + netif_receive_skb(skb);
2447 + mac->stat.rx_packets++;
2448 + mac->stat.rx_bytes += skb->len;
2449 + } else {
2450 + mac->stat.rx_dropped++;
2451 + }
2452 + cont->eth.buf_len = cpu_to_npe16(DMA_BUF_SIZE);
2453 + cont->eth.pkt_len = 0;
2454 + dma_sync_single(queue->dev, phys, DMA_HDR_SIZE, DMA_TO_DEVICE);
2455 + queue_put_entry(mac->rxq, phys);
2456 + dev->quota--;
2457 + (*budget)--;
2458 + }
2459 +
2460 + return !budget;
2461 +}
2462 +
2463 +static int ix_poll(struct net_device *dev, int *budget)
2464 +{
2465 + struct mac_info *mac = netdev_priv(dev);
2466 + struct qm_queue *queue = mac->rxdoneq;
2467 +
2468 + for (;;) {
2469 + if (ix_recv(dev, budget, queue))
2470 + return 1;
2471 + netif_rx_complete(dev);
2472 + queue_enable_irq(queue);
2473 + if (!queue_len(queue))
2474 + break;
2475 + queue_disable_irq(queue);
2476 + if (netif_rx_reschedule(dev, 0))
2477 + break;
2478 + }
2479 + return 0;
2480 +}
2481 +
2482 +static void ixmac_set_rx_mode (struct net_device *dev)
2483 +{
2484 + struct mac_info *mac = netdev_priv(dev);
2485 + struct dev_mc_list *mclist;
2486 + u8 aset[dev->addr_len], aclear[dev->addr_len];
2487 + int i,j;
2488 +
2489 + if (dev->flags & IFF_PROMISC) {
2490 + mac_reset_regbit(mac, MAC_RX_CNTRL1, RX_CNTRL1_ADDR_FLTR_EN);
2491 + } else {
2492 + mac_set_regbit(mac, MAC_RX_CNTRL1, RX_CNTRL1_ADDR_FLTR_EN);
2493 +
2494 + mclist = dev->mc_list;
2495 + memset(aset, 0xff, dev->addr_len);
2496 + memset(aclear, 0x00, dev->addr_len);
2497 + for (i = 0; mclist && i < dev->mc_count; i++) {
2498 + for (j=0; j< dev->addr_len; j++) {
2499 + aset[j] &= mclist->dmi_addr[j];
2500 + aclear[j] |= mclist->dmi_addr[j];
2501 + }
2502 + mclist = mclist->next;
2503 + }
2504 + for (j=0; j< dev->addr_len; j++) {
2505 + aclear[j] = aset[j] | ~aclear[j];
2506 + }
2507 + for (i=0; i<dev->addr_len; i++) {
2508 + mac_write_reg(mac, MAC_ADDR + i, aset[i]);
2509 + mac_write_reg(mac, MAC_ADDR_MASK + i, aclear[i]);
2510 + }
2511 + }
2512 +}
2513 +
2514 +static int ixmac_open (struct net_device *dev)
2515 +{
2516 + struct mac_info *mac = netdev_priv(dev);
2517 + struct npe_info *npe = dev_get_drvdata(mac->npe_dev);
2518 + u32 buf[NPE_STAT_NUM];
2519 + int i;
2520 + u32 phys;
2521 +
2522 + /* first check if the NPE is up and running */
2523 + if (!( npe_status(npe) & IX_NPEDL_EXCTL_STATUS_RUN)) {
2524 + printk(KERN_ERR "%s: %s not running\n", dev->name,
2525 + npe->plat->name);
2526 + return -EIO;
2527 + }
2528 + if (npe_mh_status(npe)) {
2529 + printk(KERN_ERR "%s: %s not responding\n", dev->name,
2530 + npe->plat->name);
2531 + return -EIO;
2532 + }
2533 + mac->txq_pkt += init_buffer(mac->txq, TX_QUEUE_PREFILL - mac->txq_pkt);
2534 + mac->rxq_pkt += init_buffer(mac->rxq, RX_QUEUE_PREFILL - mac->rxq_pkt);
2535 +
2536 + queue_enable_irq(mac->rxdoneq);
2537 +
2538 + /* drain all buffers from then RX-done-q to make the IRQ happen */
2539 + while ((phys = queue_get_entry(mac->rxdoneq) & ~0xf)) {
2540 + struct npe_cont *cont;
2541 + cont = dma_to_virt(mac->rxdoneq->dev, phys);
2542 + cont->eth.buf_len = cpu_to_npe16(DMA_BUF_SIZE);
2543 + cont->eth.pkt_len = 0;
2544 + dma_sync_single(mac->rxdoneq->dev, phys, DMA_HDR_SIZE,
2545 + DMA_TO_DEVICE);
2546 + queue_put_entry(mac->rxq, phys);
2547 + }
2548 + mac_init(mac);
2549 + npe_mh_set_rxqid(npe, mac->plat, mac->plat->rxdoneq_id);
2550 + get_npe_stats(mac, buf, sizeof(buf), 1); /* reset stats */
2551 + get_npe_stats(mac, buf, sizeof(buf), 0);
2552 + /*
2553 + * if the extended stats contain random values
2554 + * the NPE image lacks extendet statistic counters
2555 + */
2556 + for (i=NPE_STAT_NUM_BASE; i<NPE_STAT_NUM; i++) {
2557 + if (buf[i] >10000)
2558 + break;
2559 + }
2560 + mac->npe_stat_num = i<NPE_STAT_NUM ? NPE_STAT_NUM_BASE : NPE_STAT_NUM;
2561 + mac->npe_stat_num += NPE_Q_STAT_NUM;
2562 +
2563 + mac_set_uniaddr(dev);
2564 + media_check(dev, 1);
2565 + ixmac_set_rx_mode(dev);
2566 + netif_start_queue(dev);
2567 + schedule_delayed_work(&mac->mdio_thread, MDIO_INTERVAL);
2568 + if (netif_msg_ifup(mac)) {
2569 + printk(KERN_DEBUG "%s: open " IXMAC_NAME
2570 + " RX queue %d bufs, TX queue %d bufs\n",
2571 + dev->name, mac->rxq_pkt, mac->txq_pkt);
2572 + }
2573 + return 0;
2574 +}
2575 +
2576 +static int ixmac_start_xmit (struct sk_buff *skb, struct net_device *dev)
2577 +{
2578 + struct mac_info *mac = netdev_priv(dev);
2579 + struct npe_cont *cont;
2580 + u32 phys;
2581 + struct qm_queue *queue = mac->txq;
2582 +
2583 + if (unlikely(skb->len > DMA_BUF_SIZE)) {
2584 + dev_kfree_skb(skb);
2585 + mac->stat.tx_errors++;
2586 + return NETDEV_TX_OK;
2587 + }
2588 + phys = queue_get_entry(tx_doneq) & ~0xf;
2589 + if (!phys)
2590 + goto busy;
2591 + cont = dma_to_virt(queue->dev, phys);
2592 +#ifdef CONFIG_NPE_ADDRESS_COHERENT
2593 + /* swap the payload of the SKB */
2594 + {
2595 + u32 *s = (u32*)(skb->data-2);
2596 + u32 *t = (u32*)(cont->data-2);
2597 + int i,j = (skb->len+5) / 4;
2598 + for (i=0; i<j; i++)
2599 + t[i] = cpu_to_be32(s[i]);
2600 + }
2601 +#else
2602 + //skb_copy_and_csum_dev(skb, cont->data);
2603 + memcpy(cont->data, skb->data, skb->len);
2604 +#endif
2605 + cont->eth.buf_len = cpu_to_npe16(DMA_BUF_SIZE);
2606 + cont->eth.pkt_len = cpu_to_npe16(skb->len);
2607 + /* disable VLAN functions in NPE image for now */
2608 + cont->eth.flags = 0;
2609 + dma_sync_single(queue->dev, phys, skb->len + DMA_HDR_SIZE,
2610 + DMA_TO_DEVICE);
2611 + queue_put_entry(queue, phys);
2612 + if (queue_stat(queue) == 2) { /* overflow */
2613 + queue_put_entry(tx_doneq, phys);
2614 + goto busy;
2615 + }
2616 + dev_kfree_skb(skb);
2617 +
2618 + mac->stat.tx_packets++;
2619 + mac->stat.tx_bytes += skb->len;
2620 + dev->trans_start = jiffies;
2621 + if (netif_msg_tx_queued(mac)) {
2622 + printk(KERN_DEBUG "%s: TX packet size %u\n",
2623 + dev->name, skb->len);
2624 + queue_state(mac->txq);
2625 + queue_state(tx_doneq);
2626 + }
2627 + return NETDEV_TX_OK;
2628 +busy:
2629 + return NETDEV_TX_BUSY;
2630 +}
2631 +
2632 +static int ixmac_close (struct net_device *dev)
2633 +{
2634 + struct mac_info *mac = netdev_priv(dev);
2635 +
2636 + netif_stop_queue (dev);
2637 + queue_disable_irq(mac->rxdoneq);
2638 +
2639 + mac->txq_pkt -= destroy_buffer(tx_doneq, mac->txq_pkt);
2640 + mac->rxq_pkt -= destroy_buffer(mac->rxq, mac->rxq_pkt);
2641 +
2642 + cancel_rearming_delayed_work(&(mac->mdio_thread));
2643 +
2644 + if (netif_msg_ifdown(mac)) {
2645 + printk(KERN_DEBUG "%s: close " IXMAC_NAME
2646 + " RX queue %d bufs, TX queue %d bufs\n",
2647 + dev->name, mac->rxq_pkt, mac->txq_pkt);
2648 + }
2649 + return 0;
2650 +}
2651 +
2652 +static int ixmac_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2653 +{
2654 + struct mac_info *mac = netdev_priv(dev);
2655 + int rc, duplex_changed;
2656 +
2657 + if (!netif_running(dev))
2658 + return -EINVAL;
2659 + if (!try_module_get(THIS_MODULE))
2660 + return -ENODEV;
2661 + rc = generic_mii_ioctl(&mac->mii, if_mii(rq), cmd, &duplex_changed);
2662 + module_put(THIS_MODULE);
2663 + if (duplex_changed)
2664 + update_duplex_mode(dev);
2665 + return rc;
2666 +}
2667 +
2668 +static struct net_device_stats *ixmac_stats (struct net_device *dev)
2669 +{
2670 + struct mac_info *mac = netdev_priv(dev);
2671 + return &mac->stat;
2672 +}
2673 +
2674 +static void ixmac_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
2675 +{
2676 + struct mac_info *mac = netdev_priv(dev);
2677 + struct npe_info *npe = dev_get_drvdata(mac->npe_dev);
2678 +
2679 + strcpy(info->driver, IXMAC_NAME);
2680 + strcpy(info->version, IXMAC_VERSION);
2681 + if (npe_status(npe) & IX_NPEDL_EXCTL_STATUS_RUN) {
2682 + snprintf(info->fw_version, 32, "%d.%d func [%d]",
2683 + npe->img_info[2], npe->img_info[3], npe->img_info[1]);
2684 + }
2685 + strncpy(info->bus_info, npe->plat->name, ETHTOOL_BUSINFO_LEN);
2686 +}
2687 +
2688 +static int ixmac_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2689 +{
2690 + struct mac_info *mac = netdev_priv(dev);
2691 + mii_ethtool_gset(&mac->mii, cmd);
2692 + return 0;
2693 +}
2694 +
2695 +static int ixmac_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2696 +{
2697 + struct mac_info *mac = netdev_priv(dev);
2698 + int rc;
2699 + rc = mii_ethtool_sset(&mac->mii, cmd);
2700 + return rc;
2701 +}
2702 +
2703 +static int ixmac_nway_reset(struct net_device *dev)
2704 +{
2705 + struct mac_info *mac = netdev_priv(dev);
2706 + return mii_nway_restart(&mac->mii);
2707 +}
2708 +
2709 +static u32 ixmac_get_link(struct net_device *dev)
2710 +{
2711 + struct mac_info *mac = netdev_priv(dev);
2712 + return mii_link_ok(&mac->mii);
2713 +}
2714 +
2715 +static const int mac_reg_list[] = MAC_REG_LIST;
2716 +
2717 +static int ixmac_get_regs_len(struct net_device *dev)
2718 +{
2719 + return ARRAY_SIZE(mac_reg_list);
2720 +}
2721 +
2722 +static void
2723 +ixmac_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *regbuf)
2724 +{
2725 + int i;
2726 + struct mac_info *mac = netdev_priv(dev);
2727 + u8 *buf = regbuf;
2728 +
2729 + for (i=0; i<regs->len; i++) {
2730 + buf[i] = mac_read_reg(mac, mac_reg_list[i]);
2731 + }
2732 +}
2733 +
2734 +static struct {
2735 + const char str[ETH_GSTRING_LEN];
2736 +} ethtool_stats_keys[NPE_STAT_NUM + NPE_Q_STAT_NUM] = {
2737 + NPE_Q_STAT_STRINGS
2738 + NPE_STAT_STRINGS
2739 +};
2740 +
2741 +static void ixmac_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2742 +{
2743 + struct mac_info *mac = netdev_priv(dev);
2744 + memcpy(data, ethtool_stats_keys, mac->npe_stat_num * ETH_GSTRING_LEN);
2745 +}
2746 +
2747 +static int ixmac_get_stats_count(struct net_device *dev)
2748 +{
2749 + struct mac_info *mac = netdev_priv(dev);
2750 + return mac->npe_stat_num;
2751 +}
2752 +
2753 +static u32 ixmac_get_msglevel(struct net_device *dev)
2754 +{
2755 + struct mac_info *mac = netdev_priv(dev);
2756 + return mac->msg_enable;
2757 +}
2758 +
2759 +static void ixmac_set_msglevel(struct net_device *dev, u32 datum)
2760 +{
2761 + struct mac_info *mac = netdev_priv(dev);
2762 + mac->msg_enable = datum;
2763 +}
2764 +
2765 +static void ixmac_get_ethtool_stats(struct net_device *dev,
2766 + struct ethtool_stats *stats, u64 *data)
2767 +{
2768 + int i;
2769 + struct mac_info *mac = netdev_priv(dev);
2770 + u32 buf[NPE_STAT_NUM];
2771 +
2772 + data[0] = queue_len(mac->rxq);
2773 + data[1] = queue_len(mac->rxdoneq);
2774 + data[2] = queue_len(mac->txq);
2775 + data[3] = queue_len(tx_doneq);
2776 +
2777 + get_npe_stats(mac, buf, sizeof(buf), 0);
2778 +
2779 + for (i=0; i<stats->n_stats-4; i++) {
2780 + data[i+4] = npe_to_cpu32(buf[i]);
2781 + }
2782 +}
2783 +
2784 +static struct ethtool_ops ixmac_ethtool_ops = {
2785 + .get_drvinfo = ixmac_get_drvinfo,
2786 + .get_settings = ixmac_get_settings,
2787 + .set_settings = ixmac_set_settings,
2788 + .nway_reset = ixmac_nway_reset,
2789 + .get_link = ixmac_get_link,
2790 + .get_msglevel = ixmac_get_msglevel,
2791 + .set_msglevel = ixmac_set_msglevel,
2792 + .get_regs_len = ixmac_get_regs_len,
2793 + .get_regs = ixmac_get_regs,
2794 + .get_perm_addr = ethtool_op_get_perm_addr,
2795 + .get_strings = ixmac_get_strings,
2796 + .get_stats_count = ixmac_get_stats_count,
2797 + .get_ethtool_stats = ixmac_get_ethtool_stats,
2798 +};
2799 +
2800 +static void mac_mdio_thread(struct work_struct *work)
2801 +{
2802 + struct mac_info *mac = container_of(work, struct mac_info,
2803 + mdio_thread.work);
2804 + struct net_device *dev = mac->netdev;
2805 +
2806 + media_check(dev, 0);
2807 + schedule_delayed_work(&mac->mdio_thread, MDIO_INTERVAL);
2808 +}
2809 +
2810 +static int mac_probe(struct platform_device *pdev)
2811 +{
2812 + struct resource *res;
2813 + struct mac_info *mac;
2814 + struct net_device *dev;
2815 + struct npe_info *npe;
2816 + struct mac_plat_info *plat = pdev->dev.platform_data;
2817 + int size, ret;
2818 +
2819 + if (!(res = platform_get_resource(pdev, IORESOURCE_MEM, 0))) {
2820 + return -EIO;
2821 + }
2822 + if (!(dev = alloc_etherdev (sizeof(struct mac_info)))) {
2823 + return -ENOMEM;
2824 + }
2825 + SET_MODULE_OWNER(dev);
2826 + SET_NETDEV_DEV(dev, &pdev->dev);
2827 + mac = netdev_priv(dev);
2828 + mac->netdev = dev;
2829 +
2830 + size = res->end - res->start +1;
2831 + mac->res = request_mem_region(res->start, size, IXMAC_NAME);
2832 + if (!mac->res) {
2833 + ret = -EBUSY;
2834 + goto out_free;
2835 + }
2836 +
2837 + mac->addr = ioremap(res->start, size);
2838 + if (!mac->addr) {
2839 + ret = -ENOMEM;
2840 + goto out_rel;
2841 + }
2842 +
2843 + dev->open = ixmac_open;
2844 + dev->hard_start_xmit = ixmac_start_xmit;
2845 + dev->poll = ix_poll;
2846 + dev->stop = ixmac_close;
2847 + dev->get_stats = ixmac_stats;
2848 + dev->do_ioctl = ixmac_ioctl;
2849 + dev->set_multicast_list = ixmac_set_rx_mode;
2850 + dev->ethtool_ops = &ixmac_ethtool_ops;
2851 +
2852 + dev->weight = 16;
2853 + dev->tx_queue_len = 100;
2854 +
2855 + mac->npe_dev = get_npe_by_id(plat->npe_id);
2856 + if (!mac->npe_dev) {
2857 + ret = -EIO;
2858 + goto out_unmap;
2859 + }
2860 + npe = dev_get_drvdata(mac->npe_dev);
2861 +
2862 + mac->rxq = request_queue(plat->rxq_id, 128);
2863 + if (IS_ERR(mac->rxq)) {
2864 + printk(KERN_ERR "Error requesting Q: %d\n", plat->rxq_id);
2865 + ret = -EBUSY;
2866 + goto out_putmod;
2867 + }
2868 + mac->txq = request_queue(plat->txq_id, 128);
2869 + if (IS_ERR(mac->txq)) {
2870 + printk(KERN_ERR "Error requesting Q: %d\n", plat->txq_id);
2871 + ret = -EBUSY;
2872 + goto out_putmod;
2873 + }
2874 + mac->rxdoneq = request_queue(plat->rxdoneq_id, 128);
2875 + if (IS_ERR(mac->rxdoneq)) {
2876 + printk(KERN_ERR "Error requesting Q: %d\n", plat->rxdoneq_id);
2877 + ret = -EBUSY;
2878 + goto out_putmod;
2879 + }
2880 + mac->rxdoneq->irq_cb = irqcb_recv;
2881 + mac->rxdoneq->cb_data = dev;
2882 + queue_set_watermarks(mac->rxdoneq, 0, 0);
2883 + queue_set_irq_src(mac->rxdoneq, Q_IRQ_ID_NOT_E);
2884 +
2885 + mac->qmgr = dev_get_drvdata(mac->rxq->dev);
2886 + if (register_netdev (dev)) {
2887 + ret = -EIO;
2888 + goto out_putmod;
2889 + }
2890 +
2891 + mac->plat = plat;
2892 + mac->npe_stat_num = NPE_STAT_NUM_BASE;
2893 + mac->msg_enable = netif_msg_init(debug, MAC_DEF_MSG_ENABLE);
2894 +
2895 + platform_set_drvdata(pdev, dev);
2896 +
2897 + mac_write_reg(mac, MAC_CORE_CNTRL, CORE_RESET);
2898 + udelay(500);
2899 + mac_write_reg(mac, MAC_CORE_CNTRL, CORE_MDC_EN);
2900 +
2901 + init_mdio(dev, plat->phy_id);
2902 +
2903 + INIT_DELAYED_WORK(&mac->mdio_thread, mac_mdio_thread);
2904 +
2905 + /* The place of the MAC address is very system dependent.
2906 + * Here we use a random one to be replaced by one of the
2907 + * following commands:
2908 + * "ip link set address 02:03:04:04:04:01 dev eth0"
2909 + * "ifconfig eth0 hw ether 02:03:04:04:04:07"
2910 + */
2911 +
2912 + if (is_zero_ether_addr(plat->hwaddr)) {
2913 + random_ether_addr(dev->dev_addr);
2914 + dev->dev_addr[5] = plat->phy_id;
2915 + }
2916 + else
2917 + memcpy(dev->dev_addr, plat->hwaddr, 6);
2918 +
2919 + printk(KERN_INFO IXMAC_NAME " driver " IXMAC_VERSION
2920 + ": %s on %s with PHY[%d] initialized\n",
2921 + dev->name, npe->plat->name, plat->phy_id);
2922 +
2923 + return 0;
2924 +
2925 +out_putmod:
2926 + if (mac->rxq)
2927 + release_queue(mac->rxq);
2928 + if (mac->txq)
2929 + release_queue(mac->txq);
2930 + if (mac->rxdoneq)
2931 + release_queue(mac->rxdoneq);
2932 + module_put(mac->npe_dev->driver->owner);
2933 +out_unmap:
2934 + iounmap(mac->addr);
2935 +out_rel:
2936 + release_resource(mac->res);
2937 +out_free:
2938 + kfree(mac);
2939 + return ret;
2940 +}
2941 +
2942 +static void drain_npe(struct mac_info *mac)
2943 +{
2944 + struct npe_info *npe = dev_get_drvdata(mac->npe_dev);
2945 + struct npe_cont *cont;
2946 + u32 phys;
2947 + int loop = 0;
2948 +
2949 + /* Now there are some skb hold by the NPE.
2950 + * We switch the MAC in loopback mode and send a pseudo packet
2951 + * that will be returned by the NPE in its last SKB.
2952 + * We will also try to isolate the PHY to keep the packets internal.
2953 + */
2954 +
2955 + if (mac->txq_pkt <2)
2956 + mac->txq_pkt += init_buffer(tx_doneq, 5);
2957 +
2958 + if (npe_status(npe) & IX_NPEDL_EXCTL_STATUS_RUN) {
2959 + mac_reset_regbit(mac, MAC_CORE_CNTRL, CORE_MDC_EN);
2960 + mac_set_regbit(mac, MAC_RX_CNTRL1, RX_CNTRL1_LOOP_EN);
2961 +
2962 + npe_mh_npe_loopback_mode(npe, mac->plat, 1);
2963 + mdelay(200);
2964 +
2965 + while (mac->rxq_pkt && loop++ < 2000 ) {
2966 + phys = queue_get_entry(tx_doneq) & ~0xf;
2967 + if (!phys)
2968 + break;
2969 + cont = dma_to_virt(queue->dev, phys);
2970 + /* actually the packets should never leave the system,
2971 + * but if they do, they shall contain 0s instead of
2972 + * intresting random data....
2973 + */
2974 + memset(cont->data, 0, 64);
2975 + cont->eth.pkt_len = 64;
2976 + dma_sync_single(mac->txq->dev, phys, 64 + DMA_HDR_SIZE,
2977 + DMA_TO_DEVICE);
2978 + queue_put_entry(mac->txq, phys);
2979 + if (queue_stat(mac->txq) == 2) { /* overflow */
2980 + queue_put_entry(tx_doneq, phys);
2981 + break;
2982 + }
2983 + mdelay(1);
2984 + mac->rxq_pkt -= destroy_buffer(mac->rxdoneq,
2985 + mac->rxq_pkt);
2986 + }
2987 + npe_mh_npe_loopback_mode(npe, mac->plat, 0);
2988 + }
2989 + /* Flush MAC TX fifo to drain the bogus packages */
2990 + mac_set_regbit(mac, MAC_CORE_CNTRL, CORE_TX_FIFO_FLUSH);
2991 + mac_reset_regbit(mac, MAC_RX_CNTRL1, RX_CNTRL1_RX_EN);
2992 + mac_reset_regbit(mac, MAC_TX_CNTRL1, TX_CNTRL1_TX_EN);
2993 + mac_reset_regbit(mac, MAC_RX_CNTRL1, RX_CNTRL1_LOOP_EN);
2994 + mac_reset_regbit(mac, MAC_CORE_CNTRL, CORE_TX_FIFO_FLUSH);
2995 + mac_reset_regbit(mac, MAC_CORE_CNTRL, CORE_TX_FIFO_FLUSH);
2996 +}
2997 +
2998 +static int mac_remove(struct platform_device *pdev)
2999 +{
3000 + struct net_device* dev = platform_get_drvdata(pdev);
3001 + struct mac_info *mac = netdev_priv(dev);
3002 +
3003 + unregister_netdev(dev);
3004 +
3005 + mac->rxq_pkt -= destroy_buffer(mac->rxq, mac->rxq_pkt);
3006 + if (mac->rxq_pkt)
3007 + drain_npe(mac);
3008 +
3009 + mac->txq_pkt -= destroy_buffer(mac->txq, mac->txq_pkt);
3010 + mac->txq_pkt -= destroy_buffer(tx_doneq, mac->txq_pkt);
3011 +
3012 + if (mac->rxq_pkt || mac->txq_pkt)
3013 + printk("Buffers lost in NPE: RX:%d, TX:%d\n",
3014 + mac->rxq_pkt, mac->txq_pkt);
3015 +
3016 + release_queue(mac->txq);
3017 + release_queue(mac->rxq);
3018 + release_queue(mac->rxdoneq);
3019 +
3020 + flush_scheduled_work();
3021 + return_npe_dev(mac->npe_dev);
3022 +
3023 + iounmap(mac->addr);
3024 + release_resource(mac->res);
3025 + platform_set_drvdata(pdev, NULL);
3026 + free_netdev(dev);
3027 + return 0;
3028 +}
3029 +
3030 +static struct platform_driver ixp4xx_mac = {
3031 + .driver.name = IXMAC_NAME,
3032 + .probe = mac_probe,
3033 + .remove = mac_remove,
3034 +};
3035 +
3036 +static int __init init_mac(void)
3037 +{
3038 + /* The TX done Queue handles skbs sent out by the NPE */
3039 + tx_doneq = request_queue(TX_DONE_QID, 128);
3040 + if (IS_ERR(tx_doneq)) {
3041 + printk(KERN_ERR "Error requesting Q: %d\n", TX_DONE_QID);
3042 + return -EBUSY;
3043 + }
3044 + return platform_driver_register(&ixp4xx_mac);
3045 +}
3046 +
3047 +static void __exit finish_mac(void)
3048 +{
3049 + platform_driver_unregister(&ixp4xx_mac);
3050 + if (tx_doneq) {
3051 + release_queue(tx_doneq);
3052 + }
3053 +}
3054 +
3055 +module_init(init_mac);
3056 +module_exit(finish_mac);
3057 +
3058 +MODULE_LICENSE("GPL");
3059 +MODULE_AUTHOR("Christian Hohnstaedt <chohnstaedt@innominate.com>");
3060 +
3061 Index: linux-2.6.21-rc1-arm/drivers/net/ixp4xx/npe.c
3062 ===================================================================
3063 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
3064 +++ linux-2.6.21-rc1-arm/drivers/net/ixp4xx/npe.c 2007-02-21 02:24:35.000000000 -0800
3065 @@ -0,0 +1,291 @@
3066 +
3067 +#include <linux/ixp_npe.h>
3068 +#include <asm/hardware.h>
3069 +
3070 +#define RESET_NPE_PARITY 0x0800
3071 +#define PARITY_BIT_MASK 0x3F00FFFF
3072 +#define CONFIG_CTRL_REG_MASK 0x3F3FFFFF
3073 +#define MAX_RETRIES 1000000
3074 +#define NPE_PHYS_REG 32
3075 +#define RESET_MBST_VAL 0x0000F0F0
3076 +#define NPE_REGMAP 0x0000001E
3077 +#define INSTR_WR_REG_SHORT 0x0000C000
3078 +#define INSTR_WR_REG_BYTE 0x00004000
3079 +#define MASK_ECS_REG_0_NEXTPC 0x1FFF0000
3080 +
3081 +#define INSTR_RD_FIFO 0x0F888220
3082 +#define INSTR_RESET_MBOX 0x0FAC8210
3083 +
3084 +#define ECS_REG_0_LDUR 8
3085 +#define ECS_REG_1_CCTXT 16
3086 +#define ECS_REG_1_SELCTXT 0
3087 +
3088 +#define ECS_BG_CTXT_REG_0 0x00
3089 +#define ECS_BG_CTXT_REG_1 0x01
3090 +#define ECS_BG_CTXT_REG_2 0x02
3091 +#define ECS_PRI_1_CTXT_REG_0 0x04
3092 +#define ECS_PRI_1_CTXT_REG_1 0x05
3093 +#define ECS_PRI_1_CTXT_REG_2 0x06
3094 +#define ECS_PRI_2_CTXT_REG_0 0x08
3095 +#define ECS_PRI_2_CTXT_REG_1 0x09
3096 +#define ECS_PRI_2_CTXT_REG_2 0x0A
3097 +#define ECS_DBG_CTXT_REG_0 0x0C
3098 +#define ECS_DBG_CTXT_REG_1 0x0D
3099 +#define ECS_DBG_CTXT_REG_2 0x0E
3100 +#define ECS_INSTRUCT_REG 0x11
3101 +
3102 +#define ECS_BG_CTXT_REG_0_RESET 0xA0000000
3103 +#define ECS_BG_CTXT_REG_1_RESET 0x01000000
3104 +#define ECS_BG_CTXT_REG_2_RESET 0x00008000
3105 +#define ECS_PRI_1_CTXT_REG_0_RESET 0x20000080
3106 +#define ECS_PRI_1_CTXT_REG_1_RESET 0x01000000
3107 +#define ECS_PRI_1_CTXT_REG_2_RESET 0x00008000
3108 +#define ECS_PRI_2_CTXT_REG_0_RESET 0x20000080
3109 +#define ECS_PRI_2_CTXT_REG_1_RESET 0x01000000
3110 +#define ECS_PRI_2_CTXT_REG_2_RESET 0x00008000
3111 +#define ECS_DBG_CTXT_REG_0_RESET 0x20000000
3112 +#define ECS_DBG_CTXT_REG_1_RESET 0x00000000
3113 +#define ECS_DBG_CTXT_REG_2_RESET 0x001E0000
3114 +#define ECS_INSTRUCT_REG_RESET 0x1003C00F
3115 +
3116 +static struct { u32 reg; u32 val; } ecs_reset[] =
3117 +{
3118 + { ECS_BG_CTXT_REG_0, ECS_BG_CTXT_REG_0_RESET },
3119 + { ECS_BG_CTXT_REG_1, ECS_BG_CTXT_REG_1_RESET },
3120 + { ECS_BG_CTXT_REG_2, ECS_BG_CTXT_REG_2_RESET },
3121 + { ECS_PRI_1_CTXT_REG_0, ECS_PRI_1_CTXT_REG_0_RESET },
3122 + { ECS_PRI_1_CTXT_REG_1, ECS_PRI_1_CTXT_REG_1_RESET },
3123 + { ECS_PRI_1_CTXT_REG_2, ECS_PRI_1_CTXT_REG_2_RESET },
3124 + { ECS_PRI_2_CTXT_REG_0, ECS_PRI_2_CTXT_REG_0_RESET },
3125 + { ECS_PRI_2_CTXT_REG_1, ECS_PRI_2_CTXT_REG_1_RESET },
3126 + { ECS_PRI_2_CTXT_REG_2, ECS_PRI_2_CTXT_REG_2_RESET },
3127 + { ECS_DBG_CTXT_REG_0, ECS_DBG_CTXT_REG_0_RESET },
3128 + { ECS_DBG_CTXT_REG_1, ECS_DBG_CTXT_REG_1_RESET },
3129 + { ECS_DBG_CTXT_REG_2, ECS_DBG_CTXT_REG_2_RESET },
3130 + { ECS_INSTRUCT_REG, ECS_INSTRUCT_REG_RESET }
3131 +};
3132 +
3133 +/* actually I have no idea what I'm doing here !!
3134 + * I only rewrite the "reset" sequence the way Intel does it.
3135 + */
3136 +
3137 +static void npe_debg_preexec(struct npe_info *npe)
3138 +{
3139 + u32 r = IX_NPEDL_MASK_ECS_DBG_REG_2_IF | IX_NPEDL_MASK_ECS_DBG_REG_2_IE;
3140 +
3141 + npe->exec_count = npe_reg_read(npe, IX_NPEDL_REG_OFFSET_EXCT);
3142 + npe_reg_write(npe, IX_NPEDL_REG_OFFSET_EXCT, 0);
3143 + npe->ctx_reg2 = npe_read_ecs_reg(npe, ECS_DBG_CTXT_REG_2);
3144 + npe_write_ecs_reg(npe, ECS_DBG_CTXT_REG_2, npe->ctx_reg2 | r);
3145 +}
3146 +
3147 +static void npe_debg_postexec(struct npe_info *npe)
3148 +{
3149 + npe_write_ecs_reg(npe, ECS_DBG_CTXT_REG_0, 0);
3150 + npe_write_exctl(npe, IX_NPEDL_EXCTL_CMD_NPE_CLR_PIPE);
3151 + npe_reg_write(npe, IX_NPEDL_REG_OFFSET_EXCT, npe->exec_count);
3152 + npe_write_ecs_reg(npe, ECS_DBG_CTXT_REG_2, npe->ctx_reg2);
3153 +}
3154 +
3155 +static int
3156 +npe_debg_inst_exec(struct npe_info *npe, u32 instr, u32 ctx, u32 ldur)
3157 +{
3158 + u32 regval, wc;
3159 + int c = 0;
3160 +
3161 + regval = IX_NPEDL_MASK_ECS_REG_0_ACTIVE |
3162 + (ldur << ECS_REG_0_LDUR);
3163 + npe_write_ecs_reg(npe, ECS_DBG_CTXT_REG_0 , regval);
3164 + /* set CCTXT at ECS DEBUG L3 to specify in which context
3165 + * to execute the instruction
3166 + */
3167 + regval = (ctx << ECS_REG_1_CCTXT) |
3168 + (ctx << ECS_REG_1_SELCTXT);
3169 + npe_write_ecs_reg(npe, ECS_DBG_CTXT_REG_1, regval);
3170 +
3171 + /* clear the pipeline */
3172 + npe_write_exctl(npe, IX_NPEDL_EXCTL_CMD_NPE_CLR_PIPE);
3173 +
3174 + /* load NPE instruction into the instruction register */
3175 + npe_write_ecs_reg(npe, ECS_INSTRUCT_REG, instr);
3176 + /* we need this value later to wait for
3177 + * completion of NPE execution step
3178 + */
3179 + wc = npe_reg_read(npe, IX_NPEDL_REG_OFFSET_WC);
3180 + npe_write_exctl(npe, IX_NPEDL_EXCTL_CMD_NPE_STEP);
3181 +
3182 + /* Watch Count register increments when NPE completes an instruction */
3183 + while (wc == npe_reg_read(npe, IX_NPEDL_REG_OFFSET_WC) &&
3184 + ++c < MAX_RETRIES);
3185 +
3186 + if (c >= MAX_RETRIES) {
3187 + printk(KERN_ERR "%s reset:npe_debg_inst_exec(): Timeout\n",
3188 + npe->plat->name);
3189 + return 1;
3190 + }
3191 + return 0;
3192 +}
3193 +
3194 +static int npe_logical_reg_write8(struct npe_info *npe, u32 addr, u32 val)
3195 +{
3196 + u32 instr;
3197 + val &= 0xff;
3198 + /* here we build the NPE assembler instruction:
3199 + * mov8 d0, #0 */
3200 + instr = INSTR_WR_REG_BYTE | /* OpCode */
3201 + addr << 9 | /* base Operand */
3202 + (val & 0x1f) << 4 | /* lower 5 bits to immediate data */
3203 + (val & ~0x1f) << (18-5);/* higher 3 bits to CoProc instr. */
3204 + /* and execute it */
3205 + return npe_debg_inst_exec(npe, instr, 0, 1);
3206 +}
3207 +
3208 +static int npe_logical_reg_write16(struct npe_info *npe, u32 addr, u32 val)
3209 +{
3210 + u32 instr;
3211 + /* here we build the NPE assembler instruction:
3212 + * mov16 d0, #0 */
3213 + val &= 0xffff;
3214 + instr = INSTR_WR_REG_SHORT | /* OpCode */
3215 + addr << 9 | /* base Operand */
3216 + (val & 0x1f) << 4 | /* lower 5 bits to immediate data */
3217 + (val & ~0x1f) << (18-5);/* higher 11 bits to CoProc instr. */
3218 + /* and execute it */
3219 + return npe_debg_inst_exec(npe, instr, 0, 1);
3220 +}
3221 +
3222 +static int npe_logical_reg_write32(struct npe_info *npe, u32 addr, u32 val)
3223 +{
3224 + /* write in 16 bit steps first the high and then the low value */
3225 + npe_logical_reg_write16(npe, addr, val >> 16);
3226 + return npe_logical_reg_write16(npe, addr+2, val & 0xffff);
3227 +}
3228 +
3229 +void npe_reset(struct npe_info *npe)
3230 +{
3231 + u32 reg, cfg_ctrl;
3232 + int i;
3233 + struct { u32 reset; int addr; int size; } ctx_reg[] = {
3234 + { 0x80, 0x1b, 8 },
3235 + { 0, 0x1c, 16 },
3236 + { 0x820, 0x1e, 16 },
3237 + { 0, 0x1f, 8 }
3238 + }, *cr;
3239 +
3240 + cfg_ctrl = npe_reg_read(npe, IX_NPEDL_REG_OFFSET_CTL);
3241 + cfg_ctrl |= 0x3F000000;
3242 + /* disable the parity interrupt */
3243 + npe_reg_write(npe, IX_NPEDL_REG_OFFSET_CTL, cfg_ctrl & PARITY_BIT_MASK);
3244 +
3245 + npe_debg_preexec(npe);
3246 +
3247 + /* clear the FIFOs */
3248 + while (npe_reg_read(npe, IX_NPEDL_REG_OFFSET_WFIFO) ==
3249 + IX_NPEDL_MASK_WFIFO_VALID);
3250 + while (npe_reg_read(npe, IX_NPEDL_REG_OFFSET_STAT) ==
3251 + IX_NPEDL_MASK_STAT_OFNE)
3252 + {
3253 + u32 reg;
3254 + reg = npe_reg_read(npe, IX_NPEDL_REG_OFFSET_FIFO);
3255 + printk("%s reset: Read FIFO:=%x\n", npe->plat->name, reg);
3256 + }
3257 + while (npe_reg_read(npe, IX_NPEDL_REG_OFFSET_STAT) ==
3258 + IX_NPEDL_MASK_STAT_IFNE) {
3259 + npe_debg_inst_exec(npe, INSTR_RD_FIFO, 0, 0);
3260 + }
3261 +
3262 + /* Reset the mailbox reg */
3263 + npe_reg_write(npe, IX_NPEDL_REG_OFFSET_MBST, RESET_MBST_VAL);
3264 + npe_debg_inst_exec(npe, INSTR_RESET_MBOX, 0, 0);
3265 +
3266 + /* Reset the physical registers in the NPE register file */
3267 + for (i=0; i<NPE_PHYS_REG; i++) {
3268 + npe_logical_reg_write16(npe, NPE_REGMAP, i >> 1);
3269 + npe_logical_reg_write32(npe, (i&1) *4, 0);
3270 + }
3271 +
3272 + /* Reset the context store. Iterate over the 16 ctx s */
3273 + for(i=0; i<16; i++) {
3274 + for (reg=0; reg<4; reg++) {
3275 + /* There is no (STEVT) register for Context 0.
3276 + * ignore if register=0 and ctx=0 */
3277 + if (!(reg || i))
3278 + continue;
3279 + /* Context 0 has no STARTPC. Instead, this value is
3280 + * used to set NextPC for Background ECS,
3281 + * to set where NPE starts executing code
3282 + */
3283 + if (!i && reg==1) {
3284 + u32 r;
3285 + r = npe_read_ecs_reg(npe, ECS_BG_CTXT_REG_0);
3286 + r &= ~MASK_ECS_REG_0_NEXTPC;
3287 + r |= (cr->reset << 16) & MASK_ECS_REG_0_NEXTPC;
3288 + continue;
3289 + }
3290 + cr = ctx_reg + reg;
3291 + switch (cr->size) {
3292 + case 8:
3293 + npe_logical_reg_write8(npe, cr->addr,
3294 + cr->reset);
3295 + break;
3296 + case 16:
3297 + npe_logical_reg_write16(npe, cr->addr,
3298 + cr->reset);
3299 + }
3300 + }
3301 + }
3302 + npe_debg_postexec(npe);
3303 +
3304 + for (i=0; i< ARRAY_SIZE(ecs_reset); i++) {
3305 + npe_write_ecs_reg(npe, ecs_reset[i].reg, ecs_reset[i].val);
3306 + }
3307 + npe_write_exctl(npe, IX_NPEDL_EXCTL_CMD_CLR_PROFILE_CNT);
3308 +
3309 + for (i=IX_NPEDL_REG_OFFSET_EXCT; i<=IX_NPEDL_REG_OFFSET_AP3; i+=4) {
3310 + npe_reg_write(npe, i, 0);
3311 + }
3312 +
3313 + npe_reg_write(npe, IX_NPEDL_REG_OFFSET_WC, 0);
3314 +
3315 + reg = *IXP4XX_EXP_CFG2;
3316 + reg |= 0x800 << npe->plat->id; /* IX_FUSE_NPE[ABC] */
3317 + *IXP4XX_EXP_CFG2 = reg;
3318 + reg &= ~(0x800 << npe->plat->id); /* IX_FUSE_NPE[ABC] */
3319 + *IXP4XX_EXP_CFG2 = reg;
3320 +
3321 + npe_stop(npe);
3322 +
3323 + npe_reg_write(npe, IX_NPEDL_REG_OFFSET_CTL,
3324 + cfg_ctrl & CONFIG_CTRL_REG_MASK);
3325 + npe->loaded = 0;
3326 +}
3327 +
3328 +
3329 +void npe_stop(struct npe_info *npe)
3330 +{
3331 + npe_write_exctl(npe, IX_NPEDL_EXCTL_CMD_NPE_STOP);
3332 + npe_write_exctl(npe, IX_NPEDL_EXCTL_CMD_NPE_CLR_PIPE);
3333 +}
3334 +
3335 +static void npe_reset_active(struct npe_info *npe, u32 reg)
3336 +{
3337 + u32 regval;
3338 +
3339 + regval = npe_read_ecs_reg(npe, reg);
3340 + regval &= ~IX_NPEDL_MASK_ECS_REG_0_ACTIVE;
3341 + npe_write_ecs_reg(npe, reg, regval);
3342 +}
3343 +
3344 +void npe_start(struct npe_info *npe)
3345 +{
3346 + npe_reset_active(npe, IX_NPEDL_ECS_PRI_1_CTXT_REG_0);
3347 + npe_reset_active(npe, IX_NPEDL_ECS_PRI_2_CTXT_REG_0);
3348 + npe_reset_active(npe, IX_NPEDL_ECS_DBG_CTXT_REG_0);
3349 +
3350 + npe_write_exctl(npe, IX_NPEDL_EXCTL_CMD_NPE_CLR_PIPE);
3351 + npe_write_exctl(npe, IX_NPEDL_EXCTL_CMD_NPE_START);
3352 +}
3353 +
3354 +EXPORT_SYMBOL(npe_stop);
3355 +EXPORT_SYMBOL(npe_start);
3356 +EXPORT_SYMBOL(npe_reset);
3357 Index: linux-2.6.21-rc1-arm/drivers/net/ixp4xx/npe_mh.c
3358 ===================================================================
3359 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
3360 +++ linux-2.6.21-rc1-arm/drivers/net/ixp4xx/npe_mh.c 2007-02-21 02:24:35.000000000 -0800
3361 @@ -0,0 +1,170 @@
3362 +/*
3363 + * npe_mh.c - NPE message handler.
3364 + *
3365 + * Copyright (C) 2006 Christian Hohnstaedt <chohnstaedt@innominate.com>
3366 + *
3367 + * This file is released under the GPLv2
3368 + */
3369 +
3370 +#include <linux/ixp_npe.h>
3371 +#include <linux/slab.h>
3372 +
3373 +#define MAX_RETRY 200
3374 +
3375 +struct npe_mh_msg {
3376 + union {
3377 + u8 byte[8]; /* Very desciptive name, I know ... */
3378 + u32 data[2];
3379 + } u;
3380 +};
3381 +
3382 +/*
3383 + * The whole code in this function must be reworked.
3384 + * It is in a state that works but is not rock solid
3385 + */
3386 +static int send_message(struct npe_info *npe, struct npe_mh_msg *msg)
3387 +{
3388 + int i,j;
3389 + u32 send[2], recv[2];
3390 +
3391 + for (i=0; i<2; i++)
3392 + send[i] = be32_to_cpu(msg->u.data[i]);
3393 +
3394 + if ((npe_reg_read(npe, IX_NPEDL_REG_OFFSET_STAT) &
3395 + IX_NPEMH_NPE_STAT_IFNE))
3396 + return -1;
3397 +
3398 + npe_reg_write(npe, IX_NPEDL_REG_OFFSET_FIFO, send[0]);
3399 + for(i=0; i<MAX_RETRY; i++) {
3400 + /* if the IFNF status bit is unset then the inFIFO is full */
3401 + if (npe_reg_read(npe, IX_NPEDL_REG_OFFSET_STAT) &
3402 + IX_NPEMH_NPE_STAT_IFNF)
3403 + break;
3404 + }
3405 + if (i>=MAX_RETRY)
3406 + return -1;
3407 + npe_reg_write(npe, IX_NPEDL_REG_OFFSET_FIFO, send[1]);
3408 + i=0;
3409 + while (!(npe_reg_read(npe, IX_NPEDL_REG_OFFSET_STAT) &
3410 + IX_NPEMH_NPE_STAT_OFNE)) {
3411 + if (i++>MAX_RETRY) {
3412 + printk("Waiting for Output FIFO NotEmpty failed\n");
3413 + return -1;
3414 + }
3415 + }
3416 + //printk("Output FIFO Not Empty. Loops: %d\n", i);
3417 + j=0;
3418 + while (npe_reg_read(npe, IX_NPEDL_REG_OFFSET_STAT) &
3419 + IX_NPEMH_NPE_STAT_OFNE) {
3420 + recv[j&1] = npe_reg_read(npe,IX_NPEDL_REG_OFFSET_FIFO);
3421 + j++;
3422 + }
3423 + if ((recv[0] != send[0]) || (recv[1] != send[1])) {
3424 + if (send[0] || send[1]) {
3425 + /* all CMDs return the complete message as answer,
3426 + * only GETSTATUS returns the ImageID of the NPE
3427 + */
3428 + printk("Unexpected answer: "
3429 + "Send %08x:%08x Ret %08x:%08x\n",
3430 + send[0], send[1], recv[0], recv[1]);
3431 + }
3432 + }
3433 + return 0;
3434 +}
3435 +
3436 +#define CMD 0
3437 +#define PORT 1
3438 +#define MAC 2
3439 +
3440 +#define IX_ETHNPE_NPE_GETSTATUS 0x00
3441 +#define IX_ETHNPE_EDB_SETPORTADDRESS 0x01
3442 +#define IX_ETHNPE_GETSTATS 0x04
3443 +#define IX_ETHNPE_RESETSTATS 0x05
3444 +#define IX_ETHNPE_FW_SETFIREWALLMODE 0x0E
3445 +#define IX_ETHNPE_VLAN_SETRXQOSENTRY 0x0B
3446 +#define IX_ETHNPE_SETLOOPBACK_MODE 0x12
3447 +
3448 +#define logical_id(mp) (((mp)->npe_id << 4) | ((mp)->port_id & 0xf))
3449 +
3450 +int npe_mh_status(struct npe_info *npe)
3451 +{
3452 + struct npe_mh_msg msg;
3453 +
3454 + memset(&msg, 0, sizeof(msg));
3455 + msg.u.byte[CMD] = IX_ETHNPE_NPE_GETSTATUS;
3456 + return send_message(npe, &msg);
3457 +}
3458 +
3459 +int npe_mh_setportaddr(struct npe_info *npe, struct mac_plat_info *mp,
3460 + u8 *macaddr)
3461 +{
3462 + struct npe_mh_msg msg;
3463 +
3464 + msg.u.byte[CMD] = IX_ETHNPE_EDB_SETPORTADDRESS;
3465 + msg.u.byte[PORT] = mp->eth_id;
3466 + memcpy(msg.u.byte + MAC, macaddr, 6);
3467 +
3468 + return send_message(npe, &msg);
3469 +}
3470 +
3471 +int npe_mh_disable_firewall(struct npe_info *npe, struct mac_plat_info *mp)
3472 +{
3473 + struct npe_mh_msg msg;
3474 +
3475 + memset(&msg, 0, sizeof(msg));
3476 + msg.u.byte[CMD] = IX_ETHNPE_FW_SETFIREWALLMODE;
3477 + msg.u.byte[PORT] = logical_id(mp);
3478 +
3479 + return send_message(npe, &msg);
3480 +}
3481 +
3482 +int npe_mh_npe_loopback_mode(struct npe_info *npe, struct mac_plat_info *mp,
3483 + int enable)
3484 +{
3485 + struct npe_mh_msg msg;
3486 +
3487 + memset(&msg, 0, sizeof(msg));
3488 + msg.u.byte[CMD] = IX_ETHNPE_SETLOOPBACK_MODE;
3489 + msg.u.byte[PORT] = logical_id(mp);
3490 + msg.u.byte[3] = enable ? 1 : 0;
3491 +
3492 + return send_message(npe, &msg);
3493 +}
3494 +
3495 +int npe_mh_set_rxqid(struct npe_info *npe, struct mac_plat_info *mp, int qid)
3496 +{
3497 + struct npe_mh_msg msg;
3498 + int i, ret;
3499 +
3500 + memset(&msg, 0, sizeof(msg));
3501 + msg.u.byte[CMD] = IX_ETHNPE_VLAN_SETRXQOSENTRY;
3502 + msg.u.byte[PORT] = logical_id(mp);
3503 + msg.u.byte[5] = qid | 0x80;
3504 + msg.u.byte[7] = qid<<4;
3505 + for(i=0; i<8; i++) {
3506 + msg.u.byte[3] = i;
3507 + if ((ret = send_message(npe, &msg)))
3508 + return ret;
3509 + }
3510 + return 0;
3511 +}
3512 +
3513 +int npe_mh_get_stats(struct npe_info *npe, struct mac_plat_info *mp, u32 phys,
3514 + int reset)
3515 +{
3516 + struct npe_mh_msg msg;
3517 + memset(&msg, 0, sizeof(msg));
3518 + msg.u.byte[CMD] = reset ? IX_ETHNPE_RESETSTATS : IX_ETHNPE_GETSTATS;
3519 + msg.u.byte[PORT] = logical_id(mp);
3520 + msg.u.data[1] = cpu_to_npe32(cpu_to_be32(phys));
3521 +
3522 + return send_message(npe, &msg);
3523 +}
3524 +
3525 +
3526 +EXPORT_SYMBOL(npe_mh_status);
3527 +EXPORT_SYMBOL(npe_mh_setportaddr);
3528 +EXPORT_SYMBOL(npe_mh_disable_firewall);
3529 +EXPORT_SYMBOL(npe_mh_set_rxqid);
3530 +EXPORT_SYMBOL(npe_mh_npe_loopback_mode);
3531 +EXPORT_SYMBOL(npe_mh_get_stats);
3532 Index: linux-2.6.21-rc1-arm/drivers/net/ixp4xx/phy.c
3533 ===================================================================
3534 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
3535 +++ linux-2.6.21-rc1-arm/drivers/net/ixp4xx/phy.c 2007-02-21 02:24:35.000000000 -0800
3536 @@ -0,0 +1,113 @@
3537 +/*
3538 + * phy.c - MDIO functions and mii initialisation
3539 + *
3540 + * Copyright (C) 2006 Christian Hohnstaedt <chohnstaedt@innominate.com>
3541 + *
3542 + * This file is released under the GPLv2
3543 + */
3544 +
3545 +
3546 +#include <linux/mutex.h>
3547 +#include "mac.h"
3548 +
3549 +#define MAX_PHYS (1<<5)
3550 +
3551 +/*
3552 + * We must always use the same MAC for acessing the MDIO
3553 + * We may not use each MAC for its PHY :-(
3554 + */
3555 +
3556 +static struct net_device *phy_dev = NULL;
3557 +static struct mutex mtx;
3558 +
3559 +/* here we remember if the PHY is alive, to avoid log dumping */
3560 +static int phy_works[MAX_PHYS];
3561 +
3562 +int mdio_read_register(struct net_device *dev, int phy_addr, int phy_reg)
3563 +{
3564 + struct mac_info *mac;
3565 + u32 cmd, reg;
3566 + int cnt = 0;
3567 +
3568 + if (!phy_dev)
3569 + return 0;
3570 +
3571 + mac = netdev_priv(phy_dev);
3572 + cmd = mdio_cmd(phy_addr, phy_reg);
3573 + mutex_lock_interruptible(&mtx);
3574 + mac_mdio_cmd_write(mac, cmd);
3575 + while((cmd = mac_mdio_cmd_read(mac)) & MII_GO) {
3576 + if (++cnt >= 100) {
3577 + printk("%s: PHY[%d] access failed\n",
3578 + dev->name, phy_addr);
3579 + break;
3580 + }
3581 + schedule();
3582 + }
3583 + reg = mac_mdio_status_read(mac);
3584 + mutex_unlock(&mtx);
3585 + if (reg & MII_READ_FAIL) {
3586 + if (phy_works[phy_addr]) {
3587 + printk("%s: PHY[%d] unresponsive\n",
3588 + dev->name, phy_addr);
3589 + }
3590 + reg = 0;
3591 + phy_works[phy_addr] = 0;
3592 + } else {
3593 + if ( !phy_works[phy_addr]) {
3594 + printk("%s: PHY[%d] responsive again\n",
3595 + dev->name, phy_addr);
3596 + }
3597 + phy_works[phy_addr] = 1;
3598 + }
3599 + return reg & 0xffff;
3600 +}
3601 +
3602 +void
3603 +mdio_write_register(struct net_device *dev, int phy_addr, int phy_reg, int val)
3604 +{
3605 + struct mac_info *mac;
3606 + u32 cmd;
3607 + int cnt=0;
3608 +
3609 + if (!phy_dev)
3610 + return;
3611 +
3612 + mac = netdev_priv(phy_dev);
3613 + cmd = mdio_cmd(phy_addr, phy_reg) | MII_WRITE | val;
3614 +
3615 + mutex_lock_interruptible(&mtx);
3616 + mac_mdio_cmd_write(mac, cmd);
3617 + while((cmd = mac_mdio_cmd_read(mac)) & MII_GO) {
3618 + if (++cnt >= 100) {
3619 + printk("%s: PHY[%d] access failed\n",
3620 + dev->name, phy_addr);
3621 + break;
3622 + }
3623 + schedule();
3624 + }
3625 + mutex_unlock(&mtx);
3626 +}
3627 +
3628 +void init_mdio(struct net_device *dev, int phy_id)
3629 +{
3630 + struct mac_info *mac = netdev_priv(dev);
3631 + int i;
3632 +
3633 + /* All phy operations should use the same MAC
3634 + * (my experience)
3635 + */
3636 + if (mac->plat->eth_id == 0) {
3637 + mutex_init(&mtx);
3638 + phy_dev = dev;
3639 + for (i=0; i<MAX_PHYS; i++)
3640 + phy_works[i] = 1;
3641 + }
3642 + mac->mii.dev = dev;
3643 + mac->mii.phy_id = phy_id;
3644 + mac->mii.phy_id_mask = MAX_PHYS - 1;
3645 + mac->mii.reg_num_mask = 0x1f;
3646 + mac->mii.mdio_read = mdio_read_register;
3647 + mac->mii.mdio_write = mdio_write_register;
3648 +}
3649 +
3650 Index: linux-2.6.21-rc1-arm/drivers/net/ixp4xx/ucode_dl.c
3651 ===================================================================
3652 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
3653 +++ linux-2.6.21-rc1-arm/drivers/net/ixp4xx/ucode_dl.c 2007-02-21 02:24:35.000000000 -0800
3654 @@ -0,0 +1,479 @@
3655 +/*
3656 + * ucode_dl.c - provide an NPE device and a char-dev for microcode download
3657 + *
3658 + * Copyright (C) 2006 Christian Hohnstaedt <chohnstaedt@innominate.com>
3659 + *
3660 + * This file is released under the GPLv2
3661 + */
3662 +
3663 +#include <linux/kernel.h>
3664 +#include <linux/module.h>
3665 +#include <linux/miscdevice.h>
3666 +#include <linux/platform_device.h>
3667 +#include <linux/fs.h>
3668 +#include <linux/init.h>
3669 +#include <linux/slab.h>
3670 +#include <linux/firmware.h>
3671 +#include <linux/dma-mapping.h>
3672 +#include <linux/byteorder/swab.h>
3673 +#include <asm/uaccess.h>
3674 +#include <asm/io.h>
3675 +
3676 +#include <linux/ixp_npe.h>
3677 +
3678 +#define IXNPE_VERSION "IXP4XX NPE driver Version 0.3.0"
3679 +
3680 +#define DL_MAGIC 0xfeedf00d
3681 +#define DL_MAGIC_SWAP 0x0df0edfe
3682 +
3683 +#define EOF_BLOCK 0xf
3684 +#define IMG_SIZE(image) (((image)->size * sizeof(u32)) + \
3685 + sizeof(struct dl_image))
3686 +
3687 +#define BT_INSTR 0
3688 +#define BT_DATA 1
3689 +
3690 +enum blk_type {
3691 + instruction,
3692 + data,
3693 +};
3694 +
3695 +struct dl_block {
3696 + u32 type;
3697 + u32 offset;
3698 +};
3699 +
3700 +struct dl_image {
3701 + u32 magic;
3702 + u32 id;
3703 + u32 size;
3704 + union {
3705 + u32 data[0];
3706 + struct dl_block block[0];
3707 + } u;
3708 +};
3709 +
3710 +struct dl_codeblock {
3711 + u32 npe_addr;
3712 + u32 size;
3713 + u32 data[0];
3714 +};
3715 +
3716 +static struct platform_driver ixp4xx_npe_driver;
3717 +
3718 +static int match_by_npeid(struct device *dev, void *id)
3719 +{
3720 + struct npe_info *npe = dev_get_drvdata(dev);
3721 + if (!npe->plat)
3722 + return 0;
3723 + return (npe->plat->id == *(int*)id);
3724 +}
3725 +
3726 +struct device *get_npe_by_id(int id)
3727 +{
3728 + struct device *dev = driver_find_device(&ixp4xx_npe_driver.driver,
3729 + NULL, &id, match_by_npeid);
3730 + if (dev) {
3731 + struct npe_info *npe = dev_get_drvdata(dev);
3732 + if (!try_module_get(THIS_MODULE)) {
3733 + put_device(dev);
3734 + return NULL;
3735 + }
3736 + npe->usage++;
3737 + }
3738 + return dev;
3739 +}
3740 +
3741 +void return_npe_dev(struct device *dev)
3742 +{
3743 + struct npe_info *npe = dev_get_drvdata(dev);
3744 + put_device(dev);
3745 + module_put(THIS_MODULE);
3746 + npe->usage--;
3747 +}
3748 +
3749 +static int
3750 +download_block(struct npe_info *npe, struct dl_codeblock *cb, unsigned type)
3751 +{
3752 + int i;
3753 + int cmd;
3754 +
3755 + switch (type) {
3756 + case BT_DATA:
3757 + cmd = IX_NPEDL_EXCTL_CMD_WR_DATA_MEM;
3758 + if (cb->npe_addr + cb->size > npe->plat->data_size) {
3759 + printk(KERN_INFO "Data size too large: %d+%d > %d\n",
3760 + cb->npe_addr, cb->size, npe->plat->data_size);
3761 + return -EIO;
3762 + }
3763 + break;
3764 + case BT_INSTR:
3765 + cmd = IX_NPEDL_EXCTL_CMD_WR_INS_MEM;
3766 + if (cb->npe_addr + cb->size > npe->plat->inst_size) {
3767 + printk(KERN_INFO "Instr size too large: %d+%d > %d\n",
3768 + cb->npe_addr, cb->size, npe->plat->inst_size);
3769 + return -EIO;
3770 + }
3771 + break;
3772 + default:
3773 + printk(KERN_INFO "Unknown CMD: %d\n", type);
3774 + return -EIO;
3775 + }
3776 +
3777 + for (i=0; i < cb->size; i++) {
3778 + npe_write_cmd(npe, cb->npe_addr + i, cb->data[i], cmd);
3779 + }
3780 +
3781 + return 0;
3782 +}
3783 +
3784 +static int store_npe_image(struct dl_image *image, struct device *dev)
3785 +{
3786 + struct dl_block *blk;
3787 + struct dl_codeblock *cb;
3788 + struct npe_info *npe;
3789 + int ret=0;
3790 +
3791 + if (!dev) {
3792 + dev = get_npe_by_id( (image->id >> 24) & 0xf);
3793 + return_npe_dev(dev);
3794 + }
3795 + if (!dev)
3796 + return -ENODEV;
3797 +
3798 + npe = dev_get_drvdata(dev);
3799 + if (npe->loaded && (npe->usage > 0)) {
3800 + printk(KERN_INFO "Cowardly refusing to reload an Image "
3801 + "into the used and running %s\n", npe->plat->name);
3802 + return 0; /* indicate success anyway... */
3803 + }
3804 + if (!cpu_is_ixp46x() && ((image->id >> 28) & 0xf)) {
3805 + printk(KERN_INFO "IXP46x NPE image ignored on IXP42x\n");
3806 + return -EIO;
3807 + }
3808 +
3809 + npe_stop(npe);
3810 + npe_reset(npe);
3811 +
3812 + for (blk = image->u.block; blk->type != EOF_BLOCK; blk++) {
3813 + if (blk->offset > image->size) {
3814 + printk(KERN_INFO "Block offset out of range\n");
3815 + return -EIO;
3816 + }
3817 + cb = (struct dl_codeblock*)&image->u.data[blk->offset];
3818 + if (blk->offset + cb->size + 2 > image->size) {
3819 + printk(KERN_INFO "Codeblock size out of range\n");
3820 + return -EIO;
3821 + }
3822 + if ((ret = download_block(npe, cb, blk->type)))
3823 + return ret;
3824 + }
3825 + *(u32*)npe->img_info = cpu_to_be32(image->id);
3826 + npe_start(npe);
3827 +
3828 + printk(KERN_INFO "Image loaded to %s Func:%x, Rel: %x:%x, Status: %x\n",
3829 + npe->plat->name, npe->img_info[1], npe->img_info[2],
3830 + npe->img_info[3], npe_status(npe));
3831 + if (npe_mh_status(npe)) {
3832 + printk(KERN_ERR "%s not responding\n", npe->plat->name);
3833 + }
3834 + npe->loaded = 1;
3835 + return 0;
3836 +}
3837 +
3838 +static int ucode_open(struct inode *inode, struct file *file)
3839 +{
3840 + file->private_data = kmalloc(sizeof(struct dl_image), GFP_KERNEL);
3841 + if (!file->private_data)
3842 + return -ENOMEM;
3843 + return 0;
3844 +}
3845 +
3846 +static int ucode_close(struct inode *inode, struct file *file)
3847 +{
3848 + kfree(file->private_data);
3849 + return 0;
3850 +}
3851 +
3852 +static ssize_t ucode_write(struct file *file, const char __user *buf,
3853 + size_t count, loff_t *ppos)
3854 +{
3855 + union {
3856 + char *data;
3857 + struct dl_image *image;
3858 + } u;
3859 + const char __user *cbuf = buf;
3860 +
3861 + u.data = file->private_data;
3862 +
3863 + while (count) {
3864 + int len;
3865 + if (*ppos < sizeof(struct dl_image)) {
3866 + len = sizeof(struct dl_image) - *ppos;
3867 + len = len > count ? count : len;
3868 + if (copy_from_user(u.data + *ppos, cbuf, len))
3869 + return -EFAULT;
3870 + count -= len;
3871 + *ppos += len;
3872 + cbuf += len;
3873 + continue;
3874 + } else if (*ppos == sizeof(struct dl_image)) {
3875 + void *data;
3876 + if (u.image->magic == DL_MAGIC_SWAP) {
3877 + printk(KERN_INFO "swapped image found\n");
3878 + u.image->id = swab32(u.image->id);
3879 + u.image->size = swab32(u.image->size);
3880 + } else if (u.image->magic != DL_MAGIC) {
3881 + printk(KERN_INFO "Bad magic:%x\n",
3882 + u.image->magic);
3883 + return -EFAULT;
3884 + }
3885 + len = IMG_SIZE(u.image);
3886 + data = kmalloc(len, GFP_KERNEL);
3887 + if (!data)
3888 + return -ENOMEM;
3889 + memcpy(data, u.data, *ppos);
3890 + kfree(u.data);
3891 + u.data = (char*)data;
3892 + file->private_data = data;
3893 + }
3894 + len = IMG_SIZE(u.image) - *ppos;
3895 + len = len > count ? count : len;
3896 + if (copy_from_user(u.data + *ppos, cbuf, len))
3897 + return -EFAULT;
3898 + count -= len;
3899 + *ppos += len;
3900 + cbuf += len;
3901 + if (*ppos == IMG_SIZE(u.image)) {
3902 + int ret, i;
3903 + *ppos = 0;
3904 + if (u.image->magic == DL_MAGIC_SWAP) {
3905 + for (i=0; i<u.image->size; i++) {
3906 + u.image->u.data[i] =
3907 + swab32(u.image->u.data[i]);
3908 + }
3909 + u.image->magic = swab32(u.image->magic);
3910 + }
3911 + ret = store_npe_image(u.image, NULL);
3912 + if (ret) {
3913 + printk(KERN_INFO "Error in NPE image: %x\n",
3914 + u.image->id);
3915 + return ret;
3916 + }
3917 + }
3918 + }
3919 + return (cbuf-buf);
3920 +}
3921 +
3922 +static void npe_firmware_probe(struct device *dev)
3923 +{
3924 +#if (defined(CONFIG_FW_LOADER) || defined(CONFIG_FW_LOADER_MODULE)) \
3925 + && defined(MODULE)
3926 + const struct firmware *fw_entry;
3927 + struct npe_info *npe = dev_get_drvdata(dev);
3928 + struct dl_image *image;
3929 + int ret = -1, i;
3930 +
3931 + if (request_firmware(&fw_entry, npe->plat->name, dev) != 0) {
3932 + return;
3933 + }
3934 + image = (struct dl_image*)fw_entry->data;
3935 + /* Sanity checks */
3936 + if (fw_entry->size < sizeof(struct dl_image)) {
3937 + printk(KERN_ERR "Firmware error: too small\n");
3938 + goto out;
3939 + }
3940 + if (image->magic == DL_MAGIC_SWAP) {
3941 + printk(KERN_INFO "swapped image found\n");
3942 + image->id = swab32(image->id);
3943 + image->size = swab32(image->size);
3944 + } else if (image->magic != DL_MAGIC) {
3945 + printk(KERN_ERR "Bad magic:%x\n", image->magic);
3946 + goto out;
3947 + }
3948 + if (IMG_SIZE(image) != fw_entry->size) {
3949 + printk(KERN_ERR "Firmware error: bad size\n");
3950 + goto out;
3951 + }
3952 + if (((image->id >> 24) & 0xf) != npe->plat->id) {
3953 + printk(KERN_ERR "NPE id missmatch\n");
3954 + goto out;
3955 + }
3956 + if (image->magic == DL_MAGIC_SWAP) {
3957 + for (i=0; i<image->size; i++) {
3958 + image->u.data[i] = swab32(image->u.data[i]);
3959 + }
3960 + image->magic = swab32(image->magic);
3961 + }
3962 +
3963 + ret = store_npe_image(image, dev);
3964 +out:
3965 + if (ret) {
3966 + printk(KERN_ERR "Error downloading Firmware for %s\n",
3967 + npe->plat->name);
3968 + }
3969 + release_firmware(fw_entry);
3970 +#endif
3971 +}
3972 +
3973 +static void disable_npe_irq(struct npe_info *npe)
3974 +{
3975 + u32 reg;
3976 + reg = npe_reg_read(npe, IX_NPEDL_REG_OFFSET_CTL);
3977 + reg &= ~(IX_NPEMH_NPE_CTL_OFE | IX_NPEMH_NPE_CTL_IFE);
3978 + reg |= IX_NPEMH_NPE_CTL_OFEWE | IX_NPEMH_NPE_CTL_IFEWE;
3979 + npe_reg_write(npe, IX_NPEDL_REG_OFFSET_CTL, reg);
3980 +}
3981 +
3982 +static ssize_t show_npe_state(struct device *dev, struct device_attribute *attr,
3983 + char *buf)
3984 +{
3985 + struct npe_info *npe = dev_get_drvdata(dev);
3986 +
3987 + strcpy(buf, npe_status(npe) & IX_NPEDL_EXCTL_STATUS_RUN ?
3988 + "start\n" : "stop\n");
3989 + return strlen(buf);
3990 +}
3991 +
3992 +static ssize_t set_npe_state(struct device *dev, struct device_attribute *attr,
3993 + const char *buf, size_t count)
3994 +{
3995 + struct npe_info *npe = dev_get_drvdata(dev);
3996 +
3997 + if (npe->usage) {
3998 + printk("%s in use: read-only\n", npe->plat->name);
3999 + return count;
4000 + }
4001 + if (!strncmp(buf, "start", 5)) {
4002 + npe_start(npe);
4003 + }
4004 + if (!strncmp(buf, "stop", 4)) {
4005 + npe_stop(npe);
4006 + }
4007 + if (!strncmp(buf, "reset", 5)) {
4008 + npe_stop(npe);
4009 + npe_reset(npe);
4010 + }
4011 + return count;
4012 +}
4013 +
4014 +static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_npe_state, set_npe_state);
4015 +
4016 +static int npe_probe(struct platform_device *pdev)
4017 +{
4018 + struct resource *res;
4019 + struct npe_info *npe;
4020 + struct npe_plat_data *plat = pdev->dev.platform_data;
4021 + int err, size, ret=0;
4022 +
4023 + if (!(res = platform_get_resource(pdev, IORESOURCE_MEM, 0)))
4024 + return -EIO;
4025 +
4026 + if (!(npe = kzalloc(sizeof(struct npe_info), GFP_KERNEL)))
4027 + return -ENOMEM;
4028 +
4029 + size = res->end - res->start +1;
4030 + npe->res = request_mem_region(res->start, size, plat->name);
4031 + if (!npe->res) {
4032 + ret = -EBUSY;
4033 + printk(KERN_ERR "Failed to get memregion(%x, %x)\n",
4034 + res->start, size);
4035 + goto out_free;
4036 + }
4037 +
4038 + npe->addr = ioremap(res->start, size);
4039 + if (!npe->addr) {
4040 + ret = -ENOMEM;
4041 + printk(KERN_ERR "Failed to ioremap(%x, %x)\n",
4042 + res->start, size);
4043 + goto out_rel;
4044 + }
4045 +
4046 + pdev->dev.coherent_dma_mask = DMA_32BIT_MASK;
4047 +
4048 + platform_set_drvdata(pdev, npe);
4049 +
4050 + err = device_create_file(&pdev->dev, &dev_attr_state);
4051 + if (err)
4052 + goto out_rel;
4053 +
4054 + npe->plat = plat;
4055 + disable_npe_irq(npe);
4056 + npe->usage = 0;
4057 + npe_reset(npe);
4058 + npe_firmware_probe(&pdev->dev);
4059 +
4060 + return 0;
4061 +
4062 +out_rel:
4063 + release_resource(npe->res);
4064 +out_free:
4065 + kfree(npe);
4066 + return ret;
4067 +}
4068 +
4069 +static struct file_operations ucode_dl_fops = {
4070 + .owner = THIS_MODULE,
4071 + .write = ucode_write,
4072 + .open = ucode_open,
4073 + .release = ucode_close,
4074 +};
4075 +
4076 +static struct miscdevice ucode_dl_dev = {
4077 + .minor = MICROCODE_MINOR,
4078 + .name = "ixp4xx_ucode",
4079 + .fops = &ucode_dl_fops,
4080 +};
4081 +
4082 +static int npe_remove(struct platform_device *pdev)
4083 +{
4084 + struct npe_info *npe = platform_get_drvdata(pdev);
4085 +
4086 + device_remove_file(&pdev->dev, &dev_attr_state);
4087 +
4088 + iounmap(npe->addr);
4089 + release_resource(npe->res);
4090 + kfree(npe);
4091 + return 0;
4092 +}
4093 +
4094 +static struct platform_driver ixp4xx_npe_driver = {
4095 + .driver = {
4096 + .name = "ixp4xx_npe",
4097 + .owner = THIS_MODULE,
4098 + },
4099 + .probe = npe_probe,
4100 + .remove = npe_remove,
4101 +};
4102 +
4103 +static int __init init_npedriver(void)
4104 +{
4105 + int ret;
4106 + if ((ret = misc_register(&ucode_dl_dev))){
4107 + printk(KERN_ERR "Failed to register misc device %d\n",
4108 + MICROCODE_MINOR);
4109 + return ret;
4110 + }
4111 + if ((ret = platform_driver_register(&ixp4xx_npe_driver)))
4112 + misc_deregister(&ucode_dl_dev);
4113 + else
4114 + printk(KERN_INFO IXNPE_VERSION " initialized\n");
4115 +
4116 + return ret;
4117 +
4118 +}
4119 +
4120 +static void __exit finish_npedriver(void)
4121 +{
4122 + misc_deregister(&ucode_dl_dev);
4123 + platform_driver_unregister(&ixp4xx_npe_driver);
4124 +}
4125 +
4126 +module_init(init_npedriver);
4127 +module_exit(finish_npedriver);
4128 +
4129 +MODULE_LICENSE("GPL");
4130 +MODULE_AUTHOR("Christian Hohnstaedt <chohnstaedt@innominate.com>");
4131 +
4132 +EXPORT_SYMBOL(get_npe_by_id);
4133 +EXPORT_SYMBOL(return_npe_dev);
4134 Index: linux-2.6.21-rc1-arm/include/asm-arm/arch-ixp4xx/ixp4xx-regs.h
4135 ===================================================================
4136 --- linux-2.6.21-rc1-arm.orig/include/asm-arm/arch-ixp4xx/ixp4xx-regs.h 2007-02-21 02:24:18.000000000 -0800
4137 +++ linux-2.6.21-rc1-arm/include/asm-arm/arch-ixp4xx/ixp4xx-regs.h 2007-02-21 02:24:35.000000000 -0800
4138 @@ -22,6 +22,8 @@
4139 #ifndef _ASM_ARM_IXP4XX_H_
4140 #define _ASM_ARM_IXP4XX_H_
4141
4142 +#include "npe_regs.h"
4143 +
4144 /*
4145 * IXP4xx Linux Memory Map:
4146 *
4147 @@ -44,6 +46,12 @@
4148 */
4149
4150 /*
4151 + * PCI Memory Space
4152 + */
4153 +#define IXP4XX_PCIMEM_BASE_PHYS (0x48000000)
4154 +#define IXP4XX_PCIMEM_REGION_SIZE (0x04000000)
4155 +#define IXP4XX_PCIMEM_BAR_SIZE (0x01000000)
4156 +/*
4157 * Queue Manager
4158 */
4159 #define IXP4XX_QMGR_BASE_PHYS (0x60000000)
4160 @@ -322,7 +330,13 @@
4161 #define PCI_ATPDMA0_LENADDR_OFFSET 0x48
4162 #define PCI_ATPDMA1_AHBADDR_OFFSET 0x4C
4163 #define PCI_ATPDMA1_PCIADDR_OFFSET 0x50
4164 -#define PCI_ATPDMA1_LENADDR_OFFSET 0x54
4165 +#define PCI_ATPDMA1_LENADDR_OFFSET 0x54
4166 +#define PCI_PTADMA0_AHBADDR_OFFSET 0x58
4167 +#define PCI_PTADMA0_PCIADDR_OFFSET 0x5c
4168 +#define PCI_PTADMA0_LENADDR_OFFSET 0x60
4169 +#define PCI_PTADMA1_AHBADDR_OFFSET 0x64
4170 +#define PCI_PTADMA1_PCIADDR_OFFSET 0x68
4171 +#define PCI_PTADMA1_LENADDR_OFFSET 0x6c
4172
4173 /*
4174 * PCI Control/Status Registers
4175 @@ -351,6 +365,12 @@
4176 #define PCI_ATPDMA1_AHBADDR IXP4XX_PCI_CSR(PCI_ATPDMA1_AHBADDR_OFFSET)
4177 #define PCI_ATPDMA1_PCIADDR IXP4XX_PCI_CSR(PCI_ATPDMA1_PCIADDR_OFFSET)
4178 #define PCI_ATPDMA1_LENADDR IXP4XX_PCI_CSR(PCI_ATPDMA1_LENADDR_OFFSET)
4179 +#define PCI_PTADMA0_AHBADDR IXP4XX_PCI_CSR(PCI_PTADMA0_AHBADDR_OFFSET)
4180 +#define PCI_PTADMA0_PCIADDR IXP4XX_PCI_CSR(PCI_PTADMA0_PCIADDR_OFFSET)
4181 +#define PCI_PTADMA0_LENADDR IXP4XX_PCI_CSR(PCI_PTADMA0_LENADDR_OFFSET)
4182 +#define PCI_PTADMA1_AHBADDR IXP4XX_PCI_CSR(PCI_PTADMA1_AHBADDR_OFFSET)
4183 +#define PCI_PTADMA1_PCIADDR IXP4XX_PCI_CSR(PCI_PTADMA1_PCIADDR_OFFSET)
4184 +#define PCI_PTADMA1_LENADDR IXP4XX_PCI_CSR(PCI_PTADMA1_LENADDR_OFFSET)
4185
4186 /*
4187 * PCI register values and bit definitions
4188 @@ -607,6 +627,34 @@
4189
4190 #define DCMD_LENGTH 0x01fff /* length mask (max = 8K - 1) */
4191
4192 +
4193 +/* Fuse Bits of IXP_EXP_CFG2 */
4194 +#define IX_FUSE_RCOMP (1 << 0)
4195 +#define IX_FUSE_USB (1 << 1)
4196 +#define IX_FUSE_HASH (1 << 2)
4197 +#define IX_FUSE_AES (1 << 3)
4198 +#define IX_FUSE_DES (1 << 4)
4199 +#define IX_FUSE_HDLC (1 << 5)
4200 +#define IX_FUSE_AAL (1 << 6)
4201 +#define IX_FUSE_HSS (1 << 7)
4202 +#define IX_FUSE_UTOPIA (1 << 8)
4203 +#define IX_FUSE_ETH0 (1 << 9)
4204 +#define IX_FUSE_ETH1 (1 << 10)
4205 +#define IX_FUSE_NPEA (1 << 11)
4206 +#define IX_FUSE_NPEB (1 << 12)
4207 +#define IX_FUSE_NPEC (1 << 13)
4208 +#define IX_FUSE_PCI (1 << 14)
4209 +#define IX_FUSE_ECC (1 << 15)
4210 +#define IX_FUSE_UTOPIA_PHY_LIMIT (3 << 16)
4211 +#define IX_FUSE_USB_HOST (1 << 18)
4212 +#define IX_FUSE_NPEA_ETH (1 << 19)
4213 +#define IX_FUSE_NPEB_ETH (1 << 20)
4214 +#define IX_FUSE_RSA (1 << 21)
4215 +#define IX_FUSE_XSCALE_MAX_FREQ (3 << 22)
4216 +
4217 +#define IX_FUSE_IXP46X_ONLY IX_FUSE_XSCALE_MAX_FREQ | IX_FUSE_RSA | \
4218 + IX_FUSE_NPEB_ETH | IX_FUSE_NPEA_ETH | IX_FUSE_USB_HOST | IX_FUSE_ECC
4219 +
4220 #ifndef __ASSEMBLY__
4221 static inline int cpu_is_ixp46x(void)
4222 {
4223 @@ -620,6 +668,15 @@
4224 #endif
4225 return 0;
4226 }
4227 +
4228 +static inline u32 ix_fuse(void)
4229 +{
4230 + unsigned int fuses = ~(*IXP4XX_EXP_CFG2);
4231 + if (!cpu_is_ixp46x())
4232 + fuses &= ~IX_FUSE_IXP46X_ONLY;
4233 +
4234 + return fuses;
4235 +}
4236 #endif
4237
4238 #endif
4239 Index: linux-2.6.21-rc1-arm/include/asm-arm/arch-ixp4xx/npe_regs.h
4240 ===================================================================
4241 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
4242 +++ linux-2.6.21-rc1-arm/include/asm-arm/arch-ixp4xx/npe_regs.h 2007-02-21 02:24:35.000000000 -0800
4243 @@ -0,0 +1,82 @@
4244 +#ifndef NPE_REGS_H
4245 +#define NPE_REGS_H
4246 +
4247 +/* Execution Address */
4248 +#define IX_NPEDL_REG_OFFSET_EXAD 0x00
4249 +/* Execution Data */
4250 +#define IX_NPEDL_REG_OFFSET_EXDATA 0x04
4251 +/* Execution Control */
4252 +#define IX_NPEDL_REG_OFFSET_EXCTL 0x08
4253 +/* Execution Count */
4254 +#define IX_NPEDL_REG_OFFSET_EXCT 0x0C
4255 +/* Action Point 0 */
4256 +#define IX_NPEDL_REG_OFFSET_AP0 0x10
4257 +/* Action Point 1 */
4258 +#define IX_NPEDL_REG_OFFSET_AP1 0x14
4259 +/* Action Point 2 */
4260 +#define IX_NPEDL_REG_OFFSET_AP2 0x18
4261 +/* Action Point 3 */
4262 +#define IX_NPEDL_REG_OFFSET_AP3 0x1C
4263 +/* Watchpoint FIFO */
4264 +#define IX_NPEDL_REG_OFFSET_WFIFO 0x20
4265 +/* Watch Count */
4266 +#define IX_NPEDL_REG_OFFSET_WC 0x24
4267 +/* Profile Count */
4268 +#define IX_NPEDL_REG_OFFSET_PROFCT 0x28
4269 +
4270 +/* Messaging Status */
4271 +#define IX_NPEDL_REG_OFFSET_STAT 0x2C
4272 +/* Messaging Control */
4273 +#define IX_NPEDL_REG_OFFSET_CTL 0x30
4274 +/* Mailbox Status */
4275 +#define IX_NPEDL_REG_OFFSET_MBST 0x34
4276 +/* messaging in/out FIFO */
4277 +#define IX_NPEDL_REG_OFFSET_FIFO 0x38
4278 +
4279 +
4280 +#define IX_NPEDL_MASK_ECS_DBG_REG_2_IF 0x00100000
4281 +#define IX_NPEDL_MASK_ECS_DBG_REG_2_IE 0x00080000
4282 +#define IX_NPEDL_MASK_ECS_REG_0_ACTIVE 0x80000000
4283 +
4284 +#define IX_NPEDL_EXCTL_CMD_NPE_STEP 0x01
4285 +#define IX_NPEDL_EXCTL_CMD_NPE_START 0x02
4286 +#define IX_NPEDL_EXCTL_CMD_NPE_STOP 0x03
4287 +#define IX_NPEDL_EXCTL_CMD_NPE_CLR_PIPE 0x04
4288 +#define IX_NPEDL_EXCTL_CMD_CLR_PROFILE_CNT 0x0C
4289 +#define IX_NPEDL_EXCTL_CMD_RD_INS_MEM 0x10
4290 +#define IX_NPEDL_EXCTL_CMD_WR_INS_MEM 0x11
4291 +#define IX_NPEDL_EXCTL_CMD_RD_DATA_MEM 0x12
4292 +#define IX_NPEDL_EXCTL_CMD_WR_DATA_MEM 0x13
4293 +#define IX_NPEDL_EXCTL_CMD_RD_ECS_REG 0x14
4294 +#define IX_NPEDL_EXCTL_CMD_WR_ECS_REG 0x15
4295 +
4296 +#define IX_NPEDL_EXCTL_STATUS_RUN 0x80000000
4297 +#define IX_NPEDL_EXCTL_STATUS_STOP 0x40000000
4298 +#define IX_NPEDL_EXCTL_STATUS_CLEAR 0x20000000
4299 +
4300 +#define IX_NPEDL_MASK_WFIFO_VALID 0x80000000
4301 +#define IX_NPEDL_MASK_STAT_OFNE 0x00010000
4302 +#define IX_NPEDL_MASK_STAT_IFNE 0x00080000
4303 +
4304 +#define IX_NPEDL_ECS_DBG_CTXT_REG_0 0x0C
4305 +#define IX_NPEDL_ECS_PRI_1_CTXT_REG_0 0x04
4306 +#define IX_NPEDL_ECS_PRI_2_CTXT_REG_0 0x08
4307 +
4308 +/* NPE control register bit definitions */
4309 +#define IX_NPEMH_NPE_CTL_OFE (1 << 16) /**< OutFifoEnable */
4310 +#define IX_NPEMH_NPE_CTL_IFE (1 << 17) /**< InFifoEnable */
4311 +#define IX_NPEMH_NPE_CTL_OFEWE (1 << 24) /**< OutFifoEnableWriteEnable */
4312 +#define IX_NPEMH_NPE_CTL_IFEWE (1 << 25) /**< InFifoEnableWriteEnable */
4313 +
4314 +/* NPE status register bit definitions */
4315 +#define IX_NPEMH_NPE_STAT_OFNE (1 << 16) /**< OutFifoNotEmpty */
4316 +#define IX_NPEMH_NPE_STAT_IFNF (1 << 17) /**< InFifoNotFull */
4317 +#define IX_NPEMH_NPE_STAT_OFNF (1 << 18) /**< OutFifoNotFull */
4318 +#define IX_NPEMH_NPE_STAT_IFNE (1 << 19) /**< InFifoNotEmpty */
4319 +#define IX_NPEMH_NPE_STAT_MBINT (1 << 20) /**< Mailbox interrupt */
4320 +#define IX_NPEMH_NPE_STAT_IFINT (1 << 21) /**< InFifo interrupt */
4321 +#define IX_NPEMH_NPE_STAT_OFINT (1 << 22) /**< OutFifo interrupt */
4322 +#define IX_NPEMH_NPE_STAT_WFINT (1 << 23) /**< WatchFifo interrupt */
4323 +
4324 +#endif
4325 +
4326 Index: linux-2.6.21-rc1-arm/include/asm-arm/arch-ixp4xx/platform.h
4327 ===================================================================
4328 --- linux-2.6.21-rc1-arm.orig/include/asm-arm/arch-ixp4xx/platform.h 2007-02-21 02:24:18.000000000 -0800
4329 +++ linux-2.6.21-rc1-arm/include/asm-arm/arch-ixp4xx/platform.h 2007-02-21 02:24:35.000000000 -0800
4330 @@ -86,6 +86,25 @@
4331 unsigned long scl_pin;
4332 };
4333
4334 +struct npe_plat_data {
4335 + const char *name;
4336 + int data_size;
4337 + int inst_size;
4338 + int id; /* Node ID */
4339 +};
4340 +
4341 +struct mac_plat_info {
4342 + int npe_id; /* Node ID of the NPE for this port */
4343 + int port_id; /* Port ID for NPE-B @ ixp465 */
4344 + int eth_id; /* Physical ID */
4345 + int phy_id; /* ID of the connected PHY (PCB/platform dependent) */
4346 + int rxq_id; /* Queue ID of the RX-free q */
4347 + int rxdoneq_id; /* where incoming packets are returned */
4348 + int txq_id; /* Where to push the outgoing packets */
4349 + unsigned char hwaddr[6]; /* Desired hardware address */
4350 +
4351 +};
4352 +
4353 /*
4354 * This structure provide a means for the board setup code
4355 * to give information to th pata_ixp4xx driver. It is
4356 Index: linux-2.6.21-rc1-arm/include/linux/ixp_crypto.h
4357 ===================================================================
4358 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
4359 +++ linux-2.6.21-rc1-arm/include/linux/ixp_crypto.h 2007-02-21 02:24:35.000000000 -0800
4360 @@ -0,0 +1,192 @@
4361 +
4362 +#ifndef IX_CRYPTO_H
4363 +#define IX_CRYPTO_H
4364 +
4365 +#define MAX_KEYLEN 64
4366 +#define NPE_CTX_LEN 80
4367 +#define AES_BLOCK128 16
4368 +
4369 +#define NPE_OP_HASH_GEN_ICV 0x50
4370 +#define NPE_OP_ENC_GEN_KEY 0xc9
4371 +
4372 +
4373 +#define NPE_OP_HASH_VERIFY 0x01
4374 +#define NPE_OP_CCM_ENABLE 0x04
4375 +#define NPE_OP_CRYPT_ENABLE 0x08
4376 +#define NPE_OP_HASH_ENABLE 0x10
4377 +#define NPE_OP_NOT_IN_PLACE 0x20
4378 +#define NPE_OP_HMAC_DISABLE 0x40
4379 +#define NPE_OP_CRYPT_ENCRYPT 0x80
4380 +
4381 +#define MOD_ECB 0x0000
4382 +#define MOD_CTR 0x1000
4383 +#define MOD_CBC_ENC 0x2000
4384 +#define MOD_CBC_DEC 0x3000
4385 +#define MOD_CCM_ENC 0x4000
4386 +#define MOD_CCM_DEC 0x5000
4387 +
4388 +#define ALGO_AES 0x0800
4389 +#define CIPH_DECR 0x0000
4390 +#define CIPH_ENCR 0x0400
4391 +
4392 +#define MOD_DES 0x0000
4393 +#define MOD_TDEA2 0x0100
4394 +#define MOD_TDEA3 0x0200
4395 +#define MOD_AES128 0x0000
4396 +#define MOD_AES192 0x0100
4397 +#define MOD_AES256 0x0200
4398 +
4399 +#define KEYLEN_128 4
4400 +#define KEYLEN_192 6
4401 +#define KEYLEN_256 8
4402 +
4403 +#define CIPHER_TYPE_NULL 0
4404 +#define CIPHER_TYPE_DES 1
4405 +#define CIPHER_TYPE_3DES 2
4406 +#define CIPHER_TYPE_AES 3
4407 +
4408 +#define CIPHER_MODE_ECB 1
4409 +#define CIPHER_MODE_CTR 2
4410 +#define CIPHER_MODE_CBC 3
4411 +#define CIPHER_MODE_CCM 4
4412 +
4413 +#define HASH_TYPE_NULL 0
4414 +#define HASH_TYPE_MD5 1
4415 +#define HASH_TYPE_SHA1 2
4416 +#define HASH_TYPE_CBCMAC 3
4417 +
4418 +#define OP_REG_DONE 1
4419 +#define OP_REGISTER 2
4420 +#define OP_PERFORM 3
4421 +
4422 +#define STATE_UNREGISTERED 0
4423 +#define STATE_REGISTERED 1
4424 +#define STATE_UNLOADING 2
4425 +
4426 +struct crypt_ctl {
4427 +#ifndef CONFIG_NPE_ADDRESS_COHERENT
4428 + u8 mode; /* NPE operation */
4429 + u8 init_len;
4430 + u16 reserved;
4431 +#else
4432 + u16 reserved;
4433 + u8 init_len;
4434 + u8 mode; /* NPE operation */
4435 +#endif
4436 + u8 iv[16]; /* IV for CBC mode or CTR IV for CTR mode */
4437 + union {
4438 + u32 icv;
4439 + u32 rev_aes;
4440 + } addr;
4441 + u32 src_buf;
4442 + u32 dest_buf;
4443 +#ifndef CONFIG_NPE_ADDRESS_COHERENT
4444 + u16 auth_offs; /* Authentication start offset */
4445 + u16 auth_len; /* Authentication data length */
4446 + u16 crypt_offs; /* Cryption start offset */
4447 + u16 crypt_len; /* Cryption data length */
4448 +#else
4449 + u16 auth_len; /* Authentication data length */
4450 + u16 auth_offs; /* Authentication start offset */
4451 + u16 crypt_len; /* Cryption data length */
4452 + u16 crypt_offs; /* Cryption start offset */
4453 +#endif
4454 + u32 aadAddr; /* Additional Auth Data Addr for CCM mode */
4455 + u32 crypto_ctx; /* NPE Crypto Param structure address */
4456 +
4457 + /* Used by Host */
4458 + struct ix_sa_ctx *sa_ctx;
4459 + int oper_type;
4460 +};
4461 +
4462 +struct npe_crypt_cont {
4463 + union {
4464 + struct crypt_ctl crypt;
4465 + u8 rev_aes_key[NPE_CTX_LEN];
4466 + } ctl;
4467 + struct npe_crypt_cont *next;
4468 + struct npe_crypt_cont *virt;
4469 + dma_addr_t phys;
4470 +};
4471 +
4472 +struct ix_hash_algo {
4473 + char *name;
4474 + u32 cfgword;
4475 + int digest_len;
4476 + int aad_len;
4477 + unsigned char *icv;
4478 + int type;
4479 +};
4480 +
4481 +struct ix_cipher_algo {
4482 + char *name;
4483 + u32 cfgword_enc;
4484 + u32 cfgword_dec;
4485 + int block_len;
4486 + int iv_len;
4487 + int type;
4488 + int mode;
4489 +};
4490 +
4491 +struct ix_key {
4492 + u8 key[MAX_KEYLEN];
4493 + int len;
4494 +};
4495 +
4496 +struct ix_sa_master {
4497 + struct device *npe_dev;
4498 + struct qm_queue *sendq;
4499 + struct qm_queue *recvq;
4500 + struct dma_pool *dmapool;
4501 + struct npe_crypt_cont *pool;
4502 + int pool_size;
4503 + rwlock_t lock;
4504 +};
4505 +
4506 +struct ix_sa_dir {
4507 + unsigned char *npe_ctx;
4508 + dma_addr_t npe_ctx_phys;
4509 + int npe_ctx_idx;
4510 + u8 npe_mode;
4511 +};
4512 +
4513 +struct ix_sa_ctx {
4514 + struct list_head list;
4515 + struct ix_sa_master *master;
4516 +
4517 + const struct ix_hash_algo *h_algo;
4518 + const struct ix_cipher_algo *c_algo;
4519 + struct ix_key c_key;
4520 + struct ix_key h_key;
4521 +
4522 + int digest_len;
4523 +
4524 + struct ix_sa_dir encrypt;
4525 + struct ix_sa_dir decrypt;
4526 +
4527 + struct npe_crypt_cont *rev_aes;
4528 + gfp_t gfp_flags;
4529 +
4530 + int state;
4531 + void *priv;
4532 +
4533 + void(*reg_cb)(struct ix_sa_ctx*, int);
4534 + void(*perf_cb)(struct ix_sa_ctx*, void*, int);
4535 + atomic_t use_cnt;
4536 +};
4537 +
4538 +const struct ix_hash_algo *ix_hash_by_id(int type);
4539 +const struct ix_cipher_algo *ix_cipher_by_id(int type, int mode);
4540 +
4541 +struct ix_sa_ctx *ix_sa_ctx_new(int priv_len, gfp_t flags);
4542 +void ix_sa_ctx_free(struct ix_sa_ctx *sa_ctx);
4543 +
4544 +int ix_sa_crypto_perform(struct ix_sa_ctx *sa_ctx, u8 *data, void *ptr,
4545 + int datalen, int c_offs, int c_len, int a_offs, int a_len,
4546 + int hmac, char *iv, int encrypt);
4547 +
4548 +int ix_sa_ctx_setup_cipher_auth(struct ix_sa_ctx *sa_ctx,
4549 + const struct ix_cipher_algo *cipher,
4550 + const struct ix_hash_algo *auth, int len);
4551 +
4552 +#endif
4553 Index: linux-2.6.21-rc1-arm/include/linux/ixp_npe.h
4554 ===================================================================
4555 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
4556 +++ linux-2.6.21-rc1-arm/include/linux/ixp_npe.h 2007-02-21 02:24:35.000000000 -0800
4557 @@ -0,0 +1,117 @@
4558 +/*
4559 + * Copyright (C) 2006 Christian Hohnstaedt <chohnstaedt@innominate.com>
4560 + *
4561 + * This file is released under the GPLv2
4562 + */
4563 +
4564 +#ifndef NPE_DEVICE_H
4565 +#define NPE_DEVICE_H
4566 +
4567 +#include <linux/miscdevice.h>
4568 +#include <asm/hardware.h>
4569 +
4570 +#ifdef __ARMEB__
4571 +#undef CONFIG_NPE_ADDRESS_COHERENT
4572 +#else
4573 +#define CONFIG_NPE_ADDRESS_COHERENT
4574 +#endif
4575 +
4576 +#if defined(__ARMEB__) || defined (CONFIG_NPE_ADDRESS_COHERENT)
4577 +#define npe_to_cpu32(x) (x)
4578 +#define npe_to_cpu16(x) (x)
4579 +#define cpu_to_npe32(x) (x)
4580 +#define cpu_to_npe16(x) (x)
4581 +#else
4582 +#error NPE_DATA_COHERENT
4583 +#define NPE_DATA_COHERENT
4584 +#define npe_to_cpu32(x) be32_to_cpu(x)
4585 +#define npe_to_cpu16(x) be16_to_cpu(x)
4586 +#define cpu_to_npe32(x) cpu_to_be32(x)
4587 +#define cpu_to_npe16(x) cpu_to_be16(x)
4588 +#endif
4589 +
4590 +
4591 +struct npe_info {
4592 + struct resource *res;
4593 + void __iomem *addr;
4594 + struct npe_plat_data *plat;
4595 + u8 img_info[4];
4596 + int usage;
4597 + int loaded;
4598 + u32 exec_count;
4599 + u32 ctx_reg2;
4600 +};
4601 +
4602 +
4603 +static inline void npe_reg_write(struct npe_info *npe, u32 reg, u32 val)
4604 +{
4605 + *(volatile u32*)((u8*)(npe->addr) + reg) = val;
4606 +}
4607 +
4608 +static inline u32 npe_reg_read(struct npe_info *npe, u32 reg)
4609 +{
4610 + return *(volatile u32*)((u8*)(npe->addr) + reg);
4611 +}
4612 +
4613 +static inline u32 npe_status(struct npe_info *npe)
4614 +{
4615 + return npe_reg_read(npe, IX_NPEDL_REG_OFFSET_EXCTL);
4616 +}
4617 +
4618 +/* ixNpeDlNpeMgrCommandIssue */
4619 +static inline void npe_write_exctl(struct npe_info *npe, u32 cmd)
4620 +{
4621 + npe_reg_write(npe, IX_NPEDL_REG_OFFSET_EXCTL, cmd);
4622 +}
4623 +/* ixNpeDlNpeMgrWriteCommandIssue */
4624 +static inline void
4625 +npe_write_cmd(struct npe_info *npe, u32 addr, u32 data, int cmd)
4626 +{
4627 + npe_reg_write(npe, IX_NPEDL_REG_OFFSET_EXDATA, data);
4628 + npe_reg_write(npe, IX_NPEDL_REG_OFFSET_EXAD, addr);
4629 + npe_reg_write(npe, IX_NPEDL_REG_OFFSET_EXCTL, cmd);
4630 +}
4631 +/* ixNpeDlNpeMgrReadCommandIssue */
4632 +static inline u32
4633 +npe_read_cmd(struct npe_info *npe, u32 addr, int cmd)
4634 +{
4635 + npe_reg_write(npe, IX_NPEDL_REG_OFFSET_EXAD, addr);
4636 + npe_reg_write(npe, IX_NPEDL_REG_OFFSET_EXCTL, cmd);
4637 + /* Intel reads the data twice - so do we... */
4638 + npe_reg_read(npe, IX_NPEDL_REG_OFFSET_EXDATA);
4639 + return npe_reg_read(npe, IX_NPEDL_REG_OFFSET_EXDATA);
4640 +}
4641 +
4642 +/* ixNpeDlNpeMgrExecAccRegWrite */
4643 +static inline void npe_write_ecs_reg(struct npe_info *npe, u32 addr, u32 data)
4644 +{
4645 + npe_write_cmd(npe, addr, data, IX_NPEDL_EXCTL_CMD_WR_ECS_REG);
4646 +}
4647 +/* ixNpeDlNpeMgrExecAccRegRead */
4648 +static inline u32 npe_read_ecs_reg(struct npe_info *npe, u32 addr)
4649 +{
4650 + return npe_read_cmd(npe, addr, IX_NPEDL_EXCTL_CMD_RD_ECS_REG);
4651 +}
4652 +
4653 +extern void npe_stop(struct npe_info *npe);
4654 +extern void npe_start(struct npe_info *npe);
4655 +extern void npe_reset(struct npe_info *npe);
4656 +
4657 +extern struct device *get_npe_by_id(int id);
4658 +extern void return_npe_dev(struct device *dev);
4659 +
4660 +/* NPE Messages */
4661 +extern int
4662 +npe_mh_status(struct npe_info *npe);
4663 +extern int
4664 +npe_mh_setportaddr(struct npe_info *npe, struct mac_plat_info *mp, u8 *macaddr);
4665 +extern int
4666 +npe_mh_disable_firewall(struct npe_info *npe, struct mac_plat_info *mp);
4667 +extern int
4668 +npe_mh_set_rxqid(struct npe_info *npe, struct mac_plat_info *mp, int qid);
4669 +extern int
4670 +npe_mh_npe_loopback_mode(struct npe_info *npe, struct mac_plat_info *mp, int enable);
4671 +extern int
4672 +npe_mh_get_stats(struct npe_info *npe, struct mac_plat_info *mp, u32 phys, int reset);
4673 +
4674 +#endif
4675 Index: linux-2.6.21-rc1-arm/include/linux/ixp_qmgr.h
4676 ===================================================================
4677 --- /dev/null 1970-01-01 00:00:00.000000000 +0000
4678 +++ linux-2.6.21-rc1-arm/include/linux/ixp_qmgr.h 2007-02-21 02:24:35.000000000 -0800
4679 @@ -0,0 +1,202 @@
4680 +/*
4681 + * Copyright (C) 2006 Christian Hohnstaedt <chohnstaedt@innominate.com>
4682 + *
4683 + * This file is released under the GPLv2
4684 + */
4685 +
4686 +#ifndef IX_QMGR_H
4687 +#define IX_QMGR_H
4688 +
4689 +#include <linux/skbuff.h>
4690 +#include <linux/list.h>
4691 +#include <linux/if_ether.h>
4692 +#include <linux/spinlock.h>
4693 +#include <linux/platform_device.h>
4694 +#include <linux/ixp_npe.h>
4695 +#include <asm/atomic.h>
4696 +
4697 +/* All offsets are in 32bit words */
4698 +#define QUE_LOW_STAT0 0x100 /* 4x Status of the 32 lower queues 0-31 */
4699 +#define QUE_UO_STAT0 0x104 /* 2x Underflow/Overflow status bits*/
4700 +#define QUE_UPP_STAT0 0x106 /* 2x Status of thew 32 upper queues 32-63 */
4701 +#define INT0_SRC_SELREG0 0x108 /* 4x */
4702 +#define QUE_IE_REG0 0x10c /* 2x */
4703 +#define QUE_INT_REG0 0x10e /* 2x IRQ reg, write 1 to reset IRQ */
4704 +
4705 +#define IX_QMGR_QCFG_BASE 0x800
4706 +#define IX_QMGR_QCFG_SIZE 0x40
4707 +#define IX_QMGR_SRAM_SPACE (IX_QMGR_QCFG_BASE + IX_QMGR_QCFG_SIZE)
4708 +
4709 +#define MAX_QUEUES 32 /* first, we only support the lower 32 queues */
4710 +#define MAX_NPES 3
4711 +
4712 +enum {
4713 + Q_IRQ_ID_E = 0, /* Queue Empty due to last read */
4714 + Q_IRQ_ID_NE, /* Queue Nearly Empty due to last read */
4715 + Q_IRQ_ID_NF, /* Queue Nearly Full due to last write */
4716 + Q_IRQ_ID_F, /* Queue Full due to last write */
4717 + Q_IRQ_ID_NOT_E, /* Queue Not Empty due to last write */
4718 + Q_IRQ_ID_NOT_NE, /* Queue Not Nearly Empty due to last write */
4719 + Q_IRQ_ID_NOT_NF, /* Queue Not Nearly Full due to last read */
4720 + Q_IRQ_ID_NOT_F /* Queue Not Full due to last read */
4721 +};
4722 +
4723 +extern struct qm_queue *request_queue(int qid, int len);
4724 +extern void release_queue(struct qm_queue *queue);
4725 +extern int queue_set_irq_src(struct qm_queue *queue, int flag);
4726 +extern void queue_set_watermarks(struct qm_queue *, unsigned ne, unsigned nf);
4727 +extern int queue_len(struct qm_queue *queue);
4728 +
4729 +struct qm_qmgr;
4730 +struct qm_queue;
4731 +
4732 +typedef void(*queue_cb)(struct qm_queue *);
4733 +
4734 +struct qm_queue {
4735 + int addr; /* word offset from IX_QMGR_SRAM_SPACE */
4736 + int len; /* size in words */
4737 + int id; /* Q Id */
4738 + u32 __iomem *acc_reg;
4739 + struct device *dev;
4740 + atomic_t use;
4741 + queue_cb irq_cb;
4742 + void *cb_data;
4743 +};
4744 +
4745 +#ifndef CONFIG_NPE_ADDRESS_COHERENT
4746 +struct eth_ctl {
4747 + u32 next;
4748 + u16 buf_len;
4749 + u16 pkt_len;
4750 + u32 phys_addr;
4751 + u8 dest_id;
4752 + u8 src_id;
4753 + u16 flags;
4754 + u8 qos;
4755 + u8 padlen;
4756 + u16 vlan_tci;
4757 + u8 dest_mac[ETH_ALEN];
4758 + u8 src_mac[ETH_ALEN];
4759 +};
4760 +
4761 +#else
4762 +struct eth_ctl {
4763 + u32 next;
4764 + u16 pkt_len;
4765 + u16 buf_len;
4766 + u32 phys_addr;
4767 + u16 flags;
4768 + u8 src_id;
4769 + u8 dest_id;
4770 + u16 vlan_tci;
4771 + u8 padlen;
4772 + u8 qos;
4773 + u8 dest_mac[ETH_ALEN];
4774 + u8 src_mac[ETH_ALEN];
4775 +};
4776 +#endif
4777 +
4778 +struct npe_cont {
4779 + struct eth_ctl eth;
4780 + void *data;
4781 + struct npe_cont *next;
4782 + struct npe_cont *virt;
4783 + dma_addr_t phys;
4784 +};
4785 +
4786 +struct qm_qmgr {
4787 + u32 __iomem *addr;
4788 + struct resource *res;
4789 + struct qm_queue *queues[MAX_QUEUES];
4790 + rwlock_t lock;
4791 + struct npe_cont *pool;
4792 + struct dma_pool *dmapool;
4793 + int irq;
4794 +};
4795 +
4796 +static inline void queue_write_cfg_reg(struct qm_queue *queue, u32 val)
4797 +{
4798 + struct qm_qmgr *qmgr = dev_get_drvdata(queue->dev);
4799 + *(qmgr->addr + IX_QMGR_QCFG_BASE + queue->id) = val;
4800 +}
4801 +static inline u32 queue_read_cfg_reg(struct qm_queue *queue)
4802 +{
4803 + struct qm_qmgr *qmgr = dev_get_drvdata(queue->dev);
4804 + return *(qmgr->addr + IX_QMGR_QCFG_BASE + queue->id);
4805 +}
4806 +
4807 +static inline void queue_ack_irq(struct qm_queue *queue)
4808 +{
4809 + struct qm_qmgr *qmgr = dev_get_drvdata(queue->dev);
4810 + *(qmgr->addr + QUE_INT_REG0) = 1 << queue->id;
4811 +}
4812 +
4813 +static inline void queue_enable_irq(struct qm_queue *queue)
4814 +{
4815 + struct qm_qmgr *qmgr = dev_get_drvdata(queue->dev);
4816 + *(qmgr->addr + QUE_IE_REG0) |= 1 << queue->id;
4817 +}
4818 +
4819 +static inline void queue_disable_irq(struct qm_queue *queue)
4820 +{
4821 + struct qm_qmgr *qmgr = dev_get_drvdata(queue->dev);
4822 + *(qmgr->addr + QUE_IE_REG0) &= ~(1 << queue->id);
4823 +}
4824 +
4825 +static inline void queue_put_entry(struct qm_queue *queue, u32 entry)
4826 +{
4827 + *(queue->acc_reg) = npe_to_cpu32(entry);
4828 +}
4829 +
4830 +static inline u32 queue_get_entry(struct qm_queue *queue)
4831 +{
4832 + return cpu_to_npe32(*queue->acc_reg);
4833 +}
4834 +
4835 +static inline struct npe_cont *qmgr_get_cont(struct qm_qmgr *qmgr)
4836 +{
4837 + unsigned long flags;
4838 + struct npe_cont *cont;
4839 +
4840 + if (!qmgr->pool)
4841 + return NULL;
4842 + write_lock_irqsave(&qmgr->lock, flags);
4843 + cont = qmgr->pool;
4844 + qmgr->pool = cont->next;
4845 + write_unlock_irqrestore(&qmgr->lock, flags);
4846 + return cont;
4847 +}
4848 +
4849 +static inline void qmgr_return_cont(struct qm_qmgr *qmgr,struct npe_cont *cont)
4850 +{
4851 + unsigned long flags;
4852 +
4853 + write_lock_irqsave(&qmgr->lock, flags);
4854 + cont->next = qmgr->pool;
4855 + qmgr->pool = cont;
4856 + write_unlock_irqrestore(&qmgr->lock, flags);
4857 +}
4858 +
4859 +static inline int queue_stat(struct qm_queue *queue)
4860 +{
4861 + struct qm_qmgr *qmgr = dev_get_drvdata(queue->dev);
4862 + u32 reg = *(qmgr->addr + QUE_UO_STAT0 + (queue->id >> 4));
4863 + return (reg >> (queue->id & 0xf) << 1) & 3;
4864 +}
4865 +
4866 +/* Prints the queue state, which is very, very helpfull for debugging */
4867 +static inline void queue_state(struct qm_queue *queue)
4868 +{
4869 + u32 val=0, lstat=0;
4870 + int offs;
4871 + struct qm_qmgr *qmgr = dev_get_drvdata(queue->dev);
4872 +
4873 + offs = queue->id/8 + QUE_LOW_STAT0;
4874 + val = *(qmgr->addr + IX_QMGR_QCFG_BASE + queue->id);
4875 + lstat = (*(qmgr->addr + offs) >> ((queue->id % 8)*4)) & 0x0f;
4876 +
4877 + printk("Qid[%02d]: Wptr=%4x, Rptr=%4x, diff=%4x, Stat:%x\n", queue->id,
4878 + val&0x7f, (val>>7) &0x7f, (val - (val >> 7)) & 0x7f, lstat);
4879 +}
4880 +
4881 +#endif
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