target/linux/generic-2.6/files/crypto/ocf/hifn/hifnHIPP.c

   1 /*-
   2  * Driver for Hifn HIPP-I/II chipset
   3  * Copyright (c) 2006 Michael Richardson <mcr@xelerance.com>
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *   notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *   notice, this list of conditions and the following disclaimer in the
  13  *   documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *   derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * Effort sponsored by Hifn Inc.
  29  *
  30  */
  31
  32 /*
  33  * Driver for various Hifn encryption processors.
  34  */
  35 #ifndef AUTOCONF_INCLUDED
  36 #include <linux/config.h>
  37 #endif
  38 #include <linux/module.h>
  39 #include <linux/init.h>
  40 #include <linux/list.h>
  41 #include <linux/slab.h>
  42 #include <linux/wait.h>
  43 #include <linux/sched.h>
  44 #include <linux/pci.h>
  45 #include <linux/delay.h>
  46 #include <linux/interrupt.h>
  47 #include <linux/spinlock.h>
  48 #include <linux/random.h>
  49 #include <linux/version.h>
  50 #include <linux/skbuff.h>
  51 #include <linux/uio.h>
  52 #include <linux/sysfs.h>
  53 #include <linux/miscdevice.h>
  54 #include <asm/io.h>
  55
  56 #include <cryptodev.h>
  57
  58 #include "hifnHIPPreg.h"
  59 #include "hifnHIPPvar.h"
  60
  61 #if 1
  62 #define DPRINTF(a...)   if (hipp_debug) { \
  63                                                         printk("%s: ", sc ? \
  64                                                                 device_get_nameunit(sc->sc_dev) : "hifn"); \
  65                                                         printk(a); \
  66                                                 } else
  67 #else
  68 #define DPRINTF(a...)
  69 #endif
  70
  71 typedef int bus_size_t;
  72
  73 static inline int
  74 pci_get_revid(struct pci_dev *dev)
  75 {
  76         u8 rid = 0;
  77         pci_read_config_byte(dev, PCI_REVISION_ID, &rid);
  78         return rid;
  79 }
  80
  81 #define debug hipp_debug
  82 int hipp_debug = 0;
  83 module_param(hipp_debug, int, 0644);
  84 MODULE_PARM_DESC(hipp_debug, "Enable debug");
  85
  86 int hipp_maxbatch = 1;
  87 module_param(hipp_maxbatch, int, 0644);
  88 MODULE_PARM_DESC(hipp_maxbatch, "max ops to batch w/o interrupt");
  89
  90 static  int  hipp_probe(struct pci_dev *dev, const struct pci_device_id *ent);
  91 static  void hipp_remove(struct pci_dev *dev);
  92 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)
  93 static irqreturn_t hipp_intr(int irq, void *arg);
  94 #else
  95 static irqreturn_t hipp_intr(int irq, void *arg, struct pt_regs *regs);
  96 #endif
  97
  98 static int hipp_num_chips = 0;
  99 static struct hipp_softc *hipp_chip_idx[HIPP_MAX_CHIPS];
 100
 101 static  int hipp_newsession(device_t, u_int32_t *, struct cryptoini *);
 102 static  int hipp_freesession(device_t, u_int64_t);
 103 static  int hipp_process(device_t, struct cryptop *, int);
 104
 105 static device_method_t hipp_methods = {
 106         /* crypto device methods */
 107         DEVMETHOD(cryptodev_newsession, hipp_newsession),
 108         DEVMETHOD(cryptodev_freesession,hipp_freesession),
 109         DEVMETHOD(cryptodev_process,    hipp_process),
 110 };
 111
 112 static __inline u_int32_t
 113 READ_REG(struct hipp_softc *sc, unsigned int barno, bus_size_t reg)
 114 {
 115         u_int32_t v = readl(sc->sc_bar[barno] + reg);
 116         //sc->sc_bar0_lastreg = (bus_size_t) -1;
 117         return (v);
 118 }
 119 static __inline void
 120 WRITE_REG(struct hipp_softc *sc, unsigned int barno, bus_size_t reg, u_int32_t val)
 121 {
 122         writel(val, sc->sc_bar[barno] + reg);
 123 }
 124
 125 #define READ_REG_0(sc, reg)         READ_REG(sc, 0, reg)
 126 #define WRITE_REG_0(sc, reg, val)   WRITE_REG(sc,0, reg, val)
 127 #define READ_REG_1(sc, reg)         READ_REG(sc, 1, reg)
 128 #define WRITE_REG_1(sc, reg, val)   WRITE_REG(sc,1, reg, val)
 129
 130 static int
 131 hipp_newsession(device_t dev, u_int32_t *sidp, struct cryptoini *cri)
 132 {
 133         return EINVAL;
 134 }
 135
 136 static int
 137 hipp_freesession(device_t dev, u_int64_t tid)
 138 {
 139         return EINVAL;
 140 }
 141
 142 static int
 143 hipp_process(device_t dev, struct cryptop *crp, int hint)
 144 {
 145         return EINVAL;
 146 }
 147
 148 static const char*
 149 hipp_partname(struct hipp_softc *sc, char buf[128], size_t blen)
 150 {
 151         char *n = NULL;
 152
 153         switch (pci_get_vendor(sc->sc_pcidev)) {
 154         case PCI_VENDOR_HIFN:
 155                 switch (pci_get_device(sc->sc_pcidev)) {
 156                 case PCI_PRODUCT_HIFN_7855:     n = "Hifn 7855";
 157                 case PCI_PRODUCT_HIFN_8155:     n = "Hifn 8155";
 158                 case PCI_PRODUCT_HIFN_6500:     n = "Hifn 6500";
 159                 }
 160         }
 161
 162         if(n==NULL) {
 163                 snprintf(buf, blen, "VID=%02x,PID=%02x",
 164                          pci_get_vendor(sc->sc_pcidev),
 165                          pci_get_device(sc->sc_pcidev));
 166         } else {
 167                 buf[0]='\0';
 168                 strncat(buf, n, blen);
 169         }
 170         return buf;
 171 }
 172
 173 struct hipp_fs_entry {
 174         struct attribute attr;
 175         /* other stuff */
 176 };
 177
 178
 179 static ssize_t
 180 cryptoid_show(struct device *dev,
 181               struct device_attribute *attr,
 182               char *buf)
 183 {
 184         struct hipp_softc *sc;
 185
 186         sc = pci_get_drvdata(to_pci_dev (dev));
 187         return sprintf (buf, "%d\n", sc->sc_cid);
 188 }
 189
 190 struct device_attribute hipp_dev_cryptoid = __ATTR_RO(cryptoid);
 191
 192 /*
 193  * Attach an interface that successfully probed.
 194  */
 195 static int
 196 hipp_probe(struct pci_dev *dev, const struct pci_device_id *ent)
 197 {
 198         struct hipp_softc *sc = NULL;
 199         int i;
 200         //char rbase;
 201         //u_int16_t ena;
 202         int rev;
 203         //int rseg;
 204         int rc;
 205
 206         DPRINTF("%s()\n", __FUNCTION__);
 207
 208         if (pci_enable_device(dev) < 0)
 209                 return(-ENODEV);
 210
 211         if (pci_set_mwi(dev))
 212                 return(-ENODEV);
 213
 214         if (!dev->irq) {
 215                 printk("hifn: found device with no IRQ assigned. check BIOS settings!");
 216                 pci_disable_device(dev);
 217                 return(-ENODEV);
 218         }
 219
 220         sc = (struct hipp_softc *) kmalloc(sizeof(*sc), GFP_KERNEL);
 221         if (!sc)
 222                 return(-ENOMEM);
 223         memset(sc, 0, sizeof(*sc));
 224
 225         softc_device_init(sc, "hifn-hipp", hipp_num_chips, hipp_methods);
 226
 227         sc->sc_pcidev = dev;
 228         sc->sc_irq = -1;
 229         sc->sc_cid = -1;
 230         sc->sc_num = hipp_num_chips++;
 231
 232         if (sc->sc_num < HIPP_MAX_CHIPS)
 233                 hipp_chip_idx[sc->sc_num] = sc;
 234
 235         pci_set_drvdata(sc->sc_pcidev, sc);
 236
 237         spin_lock_init(&sc->sc_mtx);
 238
 239         /*
 240          * Setup PCI resources.
 241          * The READ_REG_0, WRITE_REG_0, READ_REG_1,
 242          * and WRITE_REG_1 macros throughout the driver are used
 243          * to permit better debugging.
 244          */
 245         for(i=0; i<4; i++) {
 246                 unsigned long mem_start, mem_len;
 247                 mem_start = pci_resource_start(sc->sc_pcidev, i);
 248                 mem_len   = pci_resource_len(sc->sc_pcidev, i);
 249                 sc->sc_barphy[i] = (caddr_t)mem_start;
 250                 sc->sc_bar[i] = (ocf_iomem_t) ioremap(mem_start, mem_len);
 251                 if (!sc->sc_bar[i]) {
 252                         device_printf(sc->sc_dev, "cannot map bar%d register space\n", i);
 253                         goto fail;
 254                 }
 255         }
 256
 257         //hipp_reset_board(sc, 0);
 258         pci_set_master(sc->sc_pcidev);
 259
 260         /*
 261          * Arrange the interrupt line.
 262          */
 263         rc = request_irq(dev->irq, hipp_intr, IRQF_SHARED, "hifn", sc);
 264         if (rc) {
 265                 device_printf(sc->sc_dev, "could not map interrupt: %d\n", rc);
 266                 goto fail;
 267         }
 268         sc->sc_irq = dev->irq;
 269
 270         rev = READ_REG_1(sc, HIPP_1_REVID) & 0xffff;
 271
 272         {
 273                 char b[32];
 274                 device_printf(sc->sc_dev, "%s, rev %u",
 275                               hipp_partname(sc, b, sizeof(b)), rev);
 276         }
 277
 278 #if 0
 279         if (sc->sc_flags & HIFN_IS_7956)
 280                 printf(", pll=0x%x<%s clk, %ux mult>",
 281                         sc->sc_pllconfig,
 282                         sc->sc_pllconfig & HIFN_PLL_REF_SEL ? "ext" : "pci",
 283                         2 + 2*((sc->sc_pllconfig & HIFN_PLL_ND) >> 11));
 284 #endif
 285         printf("\n");
 286
 287         sc->sc_cid = crypto_get_driverid(softc_get_device(sc),CRYPTOCAP_F_HARDWARE);
 288         if (sc->sc_cid < 0) {
 289                 device_printf(sc->sc_dev, "could not get crypto driver id\n");
 290                 goto fail;
 291         }
 292
 293 #if 0 /* cannot work with a non-GPL module */
 294         /* make a sysfs entry to let the world know what entry we got */
 295         sysfs_create_file(&sc->sc_pcidev->dev.kobj, &hipp_dev_cryptoid.attr);
 296 #endif
 297
 298 #if 0
 299         init_timer(&sc->sc_tickto);
 300         sc->sc_tickto.function = hifn_tick;
 301         sc->sc_tickto.data = (unsigned long) sc->sc_num;
 302         mod_timer(&sc->sc_tickto, jiffies + HZ);
 303 #endif
 304
 305 #if 0 /* no code here yet ?? */
 306         crypto_register(sc->sc_cid, CRYPTO_3DES_CBC, 0, 0);
 307 #endif
 308
 309         return (0);
 310
 311 fail:
 312         if (sc->sc_cid >= 0)
 313                 crypto_unregister_all(sc->sc_cid);
 314         if (sc->sc_irq != -1)
 315                 free_irq(sc->sc_irq, sc);
 316
 317 #if 0
 318         if (sc->sc_dma) {
 319                 /* Turn off DMA polling */
 320                 WRITE_REG_1(sc, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MSTRESET |
 321                             HIFN_DMACNFG_DMARESET | HIFN_DMACNFG_MODE);
 322
 323                 pci_free_consistent(sc->sc_pcidev,
 324                                     sizeof(*sc->sc_dma),
 325                                     sc->sc_dma, sc->sc_dma_physaddr);
 326         }
 327 #endif
 328         kfree(sc);
 329         return (-ENXIO);
 330 }
 331
 332 /*
 333  * Detach an interface that successfully probed.
 334  */
 335 static void
 336 hipp_remove(struct pci_dev *dev)
 337 {
 338         struct hipp_softc *sc = pci_get_drvdata(dev);
 339         unsigned long l_flags;
 340
 341         DPRINTF("%s()\n", __FUNCTION__);
 342
 343         /* disable interrupts */
 344         HIPP_LOCK(sc);
 345
 346 #if 0
 347         WRITE_REG_1(sc, HIFN_1_DMA_IER, 0);
 348         HIFN_UNLOCK(sc);
 349
 350         /*XXX other resources */
 351         del_timer_sync(&sc->sc_tickto);
 352
 353         /* Turn off DMA polling */
 354         WRITE_REG_1(sc, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MSTRESET |
 355             HIFN_DMACNFG_DMARESET | HIFN_DMACNFG_MODE);
 356 #endif
 357
 358         crypto_unregister_all(sc->sc_cid);
 359
 360         free_irq(sc->sc_irq, sc);
 361
 362 #if 0
 363         pci_free_consistent(sc->sc_pcidev, sizeof(*sc->sc_dma),
 364                 sc->sc_dma, sc->sc_dma_physaddr);
 365 #endif
 366 }
 367
 368 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)
 369 static irqreturn_t hipp_intr(int irq, void *arg)
 370 #else
 371 static irqreturn_t hipp_intr(int irq, void *arg, struct pt_regs *regs)
 372 #endif
 373 {
 374         struct hipp_softc *sc = arg;
 375
 376         sc = sc; /* shut up compiler */
 377
 378         return IRQ_HANDLED;
 379 }
 380
 381 static struct pci_device_id hipp_pci_tbl[] = {
 382         { PCI_VENDOR_HIFN, PCI_PRODUCT_HIFN_7855,
 383           PCI_ANY_ID, PCI_ANY_ID, 0, 0, },
 384         { PCI_VENDOR_HIFN, PCI_PRODUCT_HIFN_8155,
 385           PCI_ANY_ID, PCI_ANY_ID, 0, 0, },
 386         { 0 }
 387 };
 388 MODULE_DEVICE_TABLE(pci, hipp_pci_tbl);
 389
 390 static struct pci_driver hipp_driver = {
 391         .name         = "hipp",
 392         .id_table     = hipp_pci_tbl,
 393         .probe        = hipp_probe,
 394         .remove       = hipp_remove,
 395         /* add PM stuff here one day */
 396 };
 397
 398 static int __init hipp_init (void)
 399 {
 400         struct hipp_softc *sc = NULL;
 401         int rc;
 402
 403         DPRINTF("%s(%p)\n", __FUNCTION__, hipp_init);
 404
 405         rc = pci_register_driver(&hipp_driver);
 406         pci_register_driver_compat(&hipp_driver, rc);
 407
 408         return rc;
 409 }
 410
 411 static void __exit hipp_exit (void)
 412 {
 413         pci_unregister_driver(&hipp_driver);
 414 }
 415
 416 module_init(hipp_init);
 417 module_exit(hipp_exit);
 418
 419 MODULE_LICENSE("BSD");
 420 MODULE_AUTHOR("Michael Richardson <mcr@xelerance.com>");
 421 MODULE_DESCRIPTION("OCF driver for hifn HIPP-I/II PCI crypto devices");