-#ifndef B43_DMA_H_
-#define B43_DMA_H_
-
-#include <linux/list.h>
-#include <linux/spinlock.h>
-#include <linux/workqueue.h>
-#include <linux/linkage.h>
-#include <asm/atomic.h>
-
-#include "b43.h"
-
-/* DMA-Interrupt reasons. */
-#define B43_DMAIRQ_FATALMASK ((1 << 10) | (1 << 11) | (1 << 12) \
- | (1 << 14) | (1 << 15))
-#define B43_DMAIRQ_NONFATALMASK (1 << 13)
-#define B43_DMAIRQ_RX_DONE (1 << 16)
-
-/*** 32-bit DMA Engine. ***/
-
-/* 32-bit DMA controller registers. */
-#define B43_DMA32_TXCTL 0x00
-#define B43_DMA32_TXENABLE 0x00000001
-#define B43_DMA32_TXSUSPEND 0x00000002
-#define B43_DMA32_TXLOOPBACK 0x00000004
-#define B43_DMA32_TXFLUSH 0x00000010
-#define B43_DMA32_TXADDREXT_MASK 0x00030000
-#define B43_DMA32_TXADDREXT_SHIFT 16
-#define B43_DMA32_TXRING 0x04
-#define B43_DMA32_TXINDEX 0x08
-#define B43_DMA32_TXSTATUS 0x0C
-#define B43_DMA32_TXDPTR 0x00000FFF
-#define B43_DMA32_TXSTATE 0x0000F000
-#define B43_DMA32_TXSTAT_DISABLED 0x00000000
-#define B43_DMA32_TXSTAT_ACTIVE 0x00001000
-#define B43_DMA32_TXSTAT_IDLEWAIT 0x00002000
-#define B43_DMA32_TXSTAT_STOPPED 0x00003000
-#define B43_DMA32_TXSTAT_SUSP 0x00004000
-#define B43_DMA32_TXERROR 0x000F0000
-#define B43_DMA32_TXERR_NOERR 0x00000000
-#define B43_DMA32_TXERR_PROT 0x00010000
-#define B43_DMA32_TXERR_UNDERRUN 0x00020000
-#define B43_DMA32_TXERR_BUFREAD 0x00030000
-#define B43_DMA32_TXERR_DESCREAD 0x00040000
-#define B43_DMA32_TXACTIVE 0xFFF00000
-#define B43_DMA32_RXCTL 0x10
-#define B43_DMA32_RXENABLE 0x00000001
-#define B43_DMA32_RXFROFF_MASK 0x000000FE
-#define B43_DMA32_RXFROFF_SHIFT 1
-#define B43_DMA32_RXDIRECTFIFO 0x00000100
-#define B43_DMA32_RXADDREXT_MASK 0x00030000
-#define B43_DMA32_RXADDREXT_SHIFT 16
-#define B43_DMA32_RXRING 0x14
-#define B43_DMA32_RXINDEX 0x18
-#define B43_DMA32_RXSTATUS 0x1C
-#define B43_DMA32_RXDPTR 0x00000FFF
-#define B43_DMA32_RXSTATE 0x0000F000
-#define B43_DMA32_RXSTAT_DISABLED 0x00000000
-#define B43_DMA32_RXSTAT_ACTIVE 0x00001000
-#define B43_DMA32_RXSTAT_IDLEWAIT 0x00002000
-#define B43_DMA32_RXSTAT_STOPPED 0x00003000
-#define B43_DMA32_RXERROR 0x000F0000
-#define B43_DMA32_RXERR_NOERR 0x00000000
-#define B43_DMA32_RXERR_PROT 0x00010000
-#define B43_DMA32_RXERR_OVERFLOW 0x00020000
-#define B43_DMA32_RXERR_BUFWRITE 0x00030000
-#define B43_DMA32_RXERR_DESCREAD 0x00040000
-#define B43_DMA32_RXACTIVE 0xFFF00000
-
-/* 32-bit DMA descriptor. */
-struct b43_dmadesc32 {
- __le32 control;
- __le32 address;
-} __attribute__ ((__packed__));
-#define B43_DMA32_DCTL_BYTECNT 0x00001FFF
-#define B43_DMA32_DCTL_ADDREXT_MASK 0x00030000
-#define B43_DMA32_DCTL_ADDREXT_SHIFT 16
-#define B43_DMA32_DCTL_DTABLEEND 0x10000000
-#define B43_DMA32_DCTL_IRQ 0x20000000
-#define B43_DMA32_DCTL_FRAMEEND 0x40000000
-#define B43_DMA32_DCTL_FRAMESTART 0x80000000
-
-/*** 64-bit DMA Engine. ***/
-
-/* 64-bit DMA controller registers. */
-#define B43_DMA64_TXCTL 0x00
-#define B43_DMA64_TXENABLE 0x00000001
-#define B43_DMA64_TXSUSPEND 0x00000002
-#define B43_DMA64_TXLOOPBACK 0x00000004
-#define B43_DMA64_TXFLUSH 0x00000010
-#define B43_DMA64_TXADDREXT_MASK 0x00030000
-#define B43_DMA64_TXADDREXT_SHIFT 16
-#define B43_DMA64_TXINDEX 0x04
-#define B43_DMA64_TXRINGLO 0x08
-#define B43_DMA64_TXRINGHI 0x0C
-#define B43_DMA64_TXSTATUS 0x10
-#define B43_DMA64_TXSTATDPTR 0x00001FFF
-#define B43_DMA64_TXSTAT 0xF0000000
-#define B43_DMA64_TXSTAT_DISABLED 0x00000000
-#define B43_DMA64_TXSTAT_ACTIVE 0x10000000
-#define B43_DMA64_TXSTAT_IDLEWAIT 0x20000000
-#define B43_DMA64_TXSTAT_STOPPED 0x30000000
-#define B43_DMA64_TXSTAT_SUSP 0x40000000
-#define B43_DMA64_TXERROR 0x14
-#define B43_DMA64_TXERRDPTR 0x0001FFFF
-#define B43_DMA64_TXERR 0xF0000000
-#define B43_DMA64_TXERR_NOERR 0x00000000
-#define B43_DMA64_TXERR_PROT 0x10000000
-#define B43_DMA64_TXERR_UNDERRUN 0x20000000
-#define B43_DMA64_TXERR_TRANSFER 0x30000000
-#define B43_DMA64_TXERR_DESCREAD 0x40000000
-#define B43_DMA64_TXERR_CORE 0x50000000
-#define B43_DMA64_RXCTL 0x20
-#define B43_DMA64_RXENABLE 0x00000001
-#define B43_DMA64_RXFROFF_MASK 0x000000FE
-#define B43_DMA64_RXFROFF_SHIFT 1
-#define B43_DMA64_RXDIRECTFIFO 0x00000100
-#define B43_DMA64_RXADDREXT_MASK 0x00030000
-#define B43_DMA64_RXADDREXT_SHIFT 16
-#define B43_DMA64_RXINDEX 0x24
-#define B43_DMA64_RXRINGLO 0x28
-#define B43_DMA64_RXRINGHI 0x2C
-#define B43_DMA64_RXSTATUS 0x30
-#define B43_DMA64_RXSTATDPTR 0x00001FFF
-#define B43_DMA64_RXSTAT 0xF0000000
-#define B43_DMA64_RXSTAT_DISABLED 0x00000000
-#define B43_DMA64_RXSTAT_ACTIVE 0x10000000
-#define B43_DMA64_RXSTAT_IDLEWAIT 0x20000000
-#define B43_DMA64_RXSTAT_STOPPED 0x30000000
-#define B43_DMA64_RXSTAT_SUSP 0x40000000
-#define B43_DMA64_RXERROR 0x34
-#define B43_DMA64_RXERRDPTR 0x0001FFFF
-#define B43_DMA64_RXERR 0xF0000000
-#define B43_DMA64_RXERR_NOERR 0x00000000
-#define B43_DMA64_RXERR_PROT 0x10000000
-#define B43_DMA64_RXERR_UNDERRUN 0x20000000
-#define B43_DMA64_RXERR_TRANSFER 0x30000000
-#define B43_DMA64_RXERR_DESCREAD 0x40000000
-#define B43_DMA64_RXERR_CORE 0x50000000
-
-/* 64-bit DMA descriptor. */
-struct b43_dmadesc64 {
- __le32 control0;
- __le32 control1;
- __le32 address_low;
- __le32 address_high;
-} __attribute__ ((__packed__));
-#define B43_DMA64_DCTL0_DTABLEEND 0x10000000
-#define B43_DMA64_DCTL0_IRQ 0x20000000
-#define B43_DMA64_DCTL0_FRAMEEND 0x40000000
-#define B43_DMA64_DCTL0_FRAMESTART 0x80000000
-#define B43_DMA64_DCTL1_BYTECNT 0x00001FFF
-#define B43_DMA64_DCTL1_ADDREXT_MASK 0x00030000
-#define B43_DMA64_DCTL1_ADDREXT_SHIFT 16
-
-struct b43_dmadesc_generic {
- union {
- struct b43_dmadesc32 dma32;
- struct b43_dmadesc64 dma64;
- } __attribute__ ((__packed__));
-} __attribute__ ((__packed__));
-
-/* Misc DMA constants */
-#define B43_DMA_RINGMEMSIZE PAGE_SIZE
-#define B43_DMA0_RX_FRAMEOFFSET 30
-#define B43_DMA3_RX_FRAMEOFFSET 0
-
-/* DMA engine tuning knobs */
-#define B43_TXRING_SLOTS 128
-#define B43_RXRING_SLOTS 64
-#define B43_DMA0_RX_BUFFERSIZE (2304 + 100)
-#define B43_DMA3_RX_BUFFERSIZE 16
-
-struct sk_buff;
-struct b43_private;
-struct b43_txstatus;
-
-struct b43_dmadesc_meta {
- /* The kernel DMA-able buffer. */
- struct sk_buff *skb;
- /* DMA base bus-address of the descriptor buffer. */
- dma_addr_t dmaaddr;
- /* ieee80211 TX status. Only used once per 802.11 frag. */
- bool is_last_fragment;
-};
-
-struct b43_dmaring;
-
-/* Lowlevel DMA operations that differ between 32bit and 64bit DMA. */
-struct b43_dma_ops {
- struct b43_dmadesc_generic *(*idx2desc) (struct b43_dmaring * ring,
- int slot,
- struct b43_dmadesc_meta **
- meta);
- void (*fill_descriptor) (struct b43_dmaring * ring,
- struct b43_dmadesc_generic * desc,
- dma_addr_t dmaaddr, u16 bufsize, int start,
- int end, int irq);
- void (*poke_tx) (struct b43_dmaring * ring, int slot);
- void (*tx_suspend) (struct b43_dmaring * ring);
- void (*tx_resume) (struct b43_dmaring * ring);
- int (*get_current_rxslot) (struct b43_dmaring * ring);
- void (*set_current_rxslot) (struct b43_dmaring * ring, int slot);
-};
-
-enum b43_dmatype {
- B43_DMA_30BIT = 30,
- B43_DMA_32BIT = 32,
- B43_DMA_64BIT = 64,
-};
-
-struct b43_dmaring {
- /* Lowlevel DMA ops. */
- const struct b43_dma_ops *ops;
- /* Kernel virtual base address of the ring memory. */
- void *descbase;
- /* Meta data about all descriptors. */
- struct b43_dmadesc_meta *meta;
- /* Cache of TX headers for each slot.
- * This is to avoid an allocation on each TX.
- * This is NULL for an RX ring.
- */
- u8 *txhdr_cache;
- /* (Unadjusted) DMA base bus-address of the ring memory. */
- dma_addr_t dmabase;
- /* Number of descriptor slots in the ring. */
- int nr_slots;
- /* Number of used descriptor slots. */
- int used_slots;
- /* Currently used slot in the ring. */
- int current_slot;
- /* Total number of packets sent. Statistics only. */
- unsigned int nr_tx_packets;
- /* Frameoffset in octets. */
- u32 frameoffset;
- /* Descriptor buffer size. */
- u16 rx_buffersize;
- /* The MMIO base register of the DMA controller. */
- u16 mmio_base;
- /* DMA controller index number (0-5). */
- int index;
- /* Boolean. Is this a TX ring? */
- bool tx;
- /* The type of DMA engine used. */
- enum b43_dmatype type;
- /* Boolean. Is this ring stopped at ieee80211 level? */
- bool stopped;
- /* The QOS priority assigned to this ring. Only used for TX rings.
- * This is the mac80211 "queue" value. */
- u8 queue_prio;
- /* Lock, only used for TX. */
- spinlock_t lock;
- struct b43_wldev *dev;
-#ifdef CONFIG_B43_DEBUG
- /* Maximum number of used slots. */
- int max_used_slots;
- /* Last time we injected a ring overflow. */
- unsigned long last_injected_overflow;
- /* Statistics: Number of successfully transmitted packets */
- u64 nr_succeed_tx_packets;
- /* Statistics: Number of failed TX packets */
- u64 nr_failed_tx_packets;
- /* Statistics: Total number of TX plus all retries. */
- u64 nr_total_packet_tries;
-#endif /* CONFIG_B43_DEBUG */
-};
-
-static inline u32 b43_dma_read(struct b43_dmaring *ring, u16 offset)
-{
- return b43_read32(ring->dev, ring->mmio_base + offset);
-}
-
-static inline void b43_dma_write(struct b43_dmaring *ring, u16 offset, u32 value)
-{
- b43_write32(ring->dev, ring->mmio_base + offset, value);
-}
-
-int b43_dma_init(struct b43_wldev *dev);
-void b43_dma_free(struct b43_wldev *dev);
-
-void b43_dma_tx_suspend(struct b43_wldev *dev);
-void b43_dma_tx_resume(struct b43_wldev *dev);
-
-void b43_dma_get_tx_stats(struct b43_wldev *dev,
- struct ieee80211_tx_queue_stats *stats);
-
-int b43_dma_tx(struct b43_wldev *dev,
- struct sk_buff *skb);
-void b43_dma_handle_txstatus(struct b43_wldev *dev,
- const struct b43_txstatus *status);
-
-void b43_dma_rx(struct b43_dmaring *ring);
-
-void b43_dma_direct_fifo_rx(struct b43_wldev *dev,
- unsigned int engine_index, bool enable);
-
-#endif /* B43_DMA_H_ */
projects / openwrt.git / blobdiff