--- /dev/null
+#ifndef B43_DMA_H_
+#define B43_DMA_H_
+
+#include <linux/err.h>
+
+#include "b43.h"
+
+
+/* DMA-Interrupt reasons. */
+#define B43_DMAIRQ_FATALMASK ((1 << 10) | (1 << 11) | (1 << 12) \
+ | (1 << 14) | (1 << 15))
+#define B43_DMAIRQ_RDESC_UFLOW (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_TXPARITYDISABLE 0x00000800
+#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_RXPARITYDISABLE 0x00000800
+#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;
+} __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_TXPARITYDISABLE 0x00000800
+#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_RXPARITYDISABLE 0x00000800
+#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;
+} __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;
+ } __packed;
+} __packed;
+
+/* Misc DMA constants */
+#define B43_DMA32_RINGMEMSIZE 4096
+#define B43_DMA64_RINGMEMSIZE 8192
+/* Offset of frame with actual data */
+#define B43_DMA0_RX_FW598_FO 38
+#define B43_DMA0_RX_FW351_FO 30
+
+/* DMA engine tuning knobs */
+#define B43_TXRING_SLOTS 256
+#define B43_RXRING_SLOTS 256
+#define B43_DMA0_RX_FW598_BUFSIZE (B43_DMA0_RX_FW598_FO + IEEE80211_MAX_FRAME_LEN)
+#define B43_DMA0_RX_FW351_BUFSIZE (B43_DMA0_RX_FW351_FO + IEEE80211_MAX_FRAME_LEN)
+
+/* Pointer poison */
+#define B43_DMA_PTR_POISON ((void *)ERR_PTR(-ENOMEM))
+#define b43_dma_ptr_is_poisoned(ptr) (unlikely((ptr) == B43_DMA_PTR_POISON))
+
+
+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,
+};
+
+enum b43_addrtype {
+ B43_DMA_ADDR_LOW,
+ B43_DMA_ADDR_HIGH,
+ B43_DMA_ADDR_EXT,
+};
+
+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 TX frame.
+ * 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;
+ /* 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;
+ 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);
+
+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_handle_rx_overflow(struct b43_dmaring *ring);
+
+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_ */
Code Review / kvmfornfv.git / blobdiff