4 #include <linux/ieee80211.h>
5 #include <linux/spinlock.h>
10 /* DMA-Interrupt reasons. */
11 #define B43_DMAIRQ_FATALMASK ((1 << 10) | (1 << 11) | (1 << 12) \
12 | (1 << 14) | (1 << 15))
13 #define B43_DMAIRQ_NONFATALMASK (1 << 13)
14 #define B43_DMAIRQ_RX_DONE (1 << 16)
16 /*** 32-bit DMA Engine. ***/
18 /* 32-bit DMA controller registers. */
19 #define B43_DMA32_TXCTL 0x00
20 #define B43_DMA32_TXENABLE 0x00000001
21 #define B43_DMA32_TXSUSPEND 0x00000002
22 #define B43_DMA32_TXLOOPBACK 0x00000004
23 #define B43_DMA32_TXFLUSH 0x00000010
24 #define B43_DMA32_TXADDREXT_MASK 0x00030000
25 #define B43_DMA32_TXADDREXT_SHIFT 16
26 #define B43_DMA32_TXRING 0x04
27 #define B43_DMA32_TXINDEX 0x08
28 #define B43_DMA32_TXSTATUS 0x0C
29 #define B43_DMA32_TXDPTR 0x00000FFF
30 #define B43_DMA32_TXSTATE 0x0000F000
31 #define B43_DMA32_TXSTAT_DISABLED 0x00000000
32 #define B43_DMA32_TXSTAT_ACTIVE 0x00001000
33 #define B43_DMA32_TXSTAT_IDLEWAIT 0x00002000
34 #define B43_DMA32_TXSTAT_STOPPED 0x00003000
35 #define B43_DMA32_TXSTAT_SUSP 0x00004000
36 #define B43_DMA32_TXERROR 0x000F0000
37 #define B43_DMA32_TXERR_NOERR 0x00000000
38 #define B43_DMA32_TXERR_PROT 0x00010000
39 #define B43_DMA32_TXERR_UNDERRUN 0x00020000
40 #define B43_DMA32_TXERR_BUFREAD 0x00030000
41 #define B43_DMA32_TXERR_DESCREAD 0x00040000
42 #define B43_DMA32_TXACTIVE 0xFFF00000
43 #define B43_DMA32_RXCTL 0x10
44 #define B43_DMA32_RXENABLE 0x00000001
45 #define B43_DMA32_RXFROFF_MASK 0x000000FE
46 #define B43_DMA32_RXFROFF_SHIFT 1
47 #define B43_DMA32_RXDIRECTFIFO 0x00000100
48 #define B43_DMA32_RXADDREXT_MASK 0x00030000
49 #define B43_DMA32_RXADDREXT_SHIFT 16
50 #define B43_DMA32_RXRING 0x14
51 #define B43_DMA32_RXINDEX 0x18
52 #define B43_DMA32_RXSTATUS 0x1C
53 #define B43_DMA32_RXDPTR 0x00000FFF
54 #define B43_DMA32_RXSTATE 0x0000F000
55 #define B43_DMA32_RXSTAT_DISABLED 0x00000000
56 #define B43_DMA32_RXSTAT_ACTIVE 0x00001000
57 #define B43_DMA32_RXSTAT_IDLEWAIT 0x00002000
58 #define B43_DMA32_RXSTAT_STOPPED 0x00003000
59 #define B43_DMA32_RXERROR 0x000F0000
60 #define B43_DMA32_RXERR_NOERR 0x00000000
61 #define B43_DMA32_RXERR_PROT 0x00010000
62 #define B43_DMA32_RXERR_OVERFLOW 0x00020000
63 #define B43_DMA32_RXERR_BUFWRITE 0x00030000
64 #define B43_DMA32_RXERR_DESCREAD 0x00040000
65 #define B43_DMA32_RXACTIVE 0xFFF00000
67 /* 32-bit DMA descriptor. */
68 struct b43_dmadesc32 {
71 } __attribute__ ((__packed__));
72 #define B43_DMA32_DCTL_BYTECNT 0x00001FFF
73 #define B43_DMA32_DCTL_ADDREXT_MASK 0x00030000
74 #define B43_DMA32_DCTL_ADDREXT_SHIFT 16
75 #define B43_DMA32_DCTL_DTABLEEND 0x10000000
76 #define B43_DMA32_DCTL_IRQ 0x20000000
77 #define B43_DMA32_DCTL_FRAMEEND 0x40000000
78 #define B43_DMA32_DCTL_FRAMESTART 0x80000000
80 /*** 64-bit DMA Engine. ***/
82 /* 64-bit DMA controller registers. */
83 #define B43_DMA64_TXCTL 0x00
84 #define B43_DMA64_TXENABLE 0x00000001
85 #define B43_DMA64_TXSUSPEND 0x00000002
86 #define B43_DMA64_TXLOOPBACK 0x00000004
87 #define B43_DMA64_TXFLUSH 0x00000010
88 #define B43_DMA64_TXADDREXT_MASK 0x00030000
89 #define B43_DMA64_TXADDREXT_SHIFT 16
90 #define B43_DMA64_TXINDEX 0x04
91 #define B43_DMA64_TXRINGLO 0x08
92 #define B43_DMA64_TXRINGHI 0x0C
93 #define B43_DMA64_TXSTATUS 0x10
94 #define B43_DMA64_TXSTATDPTR 0x00001FFF
95 #define B43_DMA64_TXSTAT 0xF0000000
96 #define B43_DMA64_TXSTAT_DISABLED 0x00000000
97 #define B43_DMA64_TXSTAT_ACTIVE 0x10000000
98 #define B43_DMA64_TXSTAT_IDLEWAIT 0x20000000
99 #define B43_DMA64_TXSTAT_STOPPED 0x30000000
100 #define B43_DMA64_TXSTAT_SUSP 0x40000000
101 #define B43_DMA64_TXERROR 0x14
102 #define B43_DMA64_TXERRDPTR 0x0001FFFF
103 #define B43_DMA64_TXERR 0xF0000000
104 #define B43_DMA64_TXERR_NOERR 0x00000000
105 #define B43_DMA64_TXERR_PROT 0x10000000
106 #define B43_DMA64_TXERR_UNDERRUN 0x20000000
107 #define B43_DMA64_TXERR_TRANSFER 0x30000000
108 #define B43_DMA64_TXERR_DESCREAD 0x40000000
109 #define B43_DMA64_TXERR_CORE 0x50000000
110 #define B43_DMA64_RXCTL 0x20
111 #define B43_DMA64_RXENABLE 0x00000001
112 #define B43_DMA64_RXFROFF_MASK 0x000000FE
113 #define B43_DMA64_RXFROFF_SHIFT 1
114 #define B43_DMA64_RXDIRECTFIFO 0x00000100
115 #define B43_DMA64_RXADDREXT_MASK 0x00030000
116 #define B43_DMA64_RXADDREXT_SHIFT 16
117 #define B43_DMA64_RXINDEX 0x24
118 #define B43_DMA64_RXRINGLO 0x28
119 #define B43_DMA64_RXRINGHI 0x2C
120 #define B43_DMA64_RXSTATUS 0x30
121 #define B43_DMA64_RXSTATDPTR 0x00001FFF
122 #define B43_DMA64_RXSTAT 0xF0000000
123 #define B43_DMA64_RXSTAT_DISABLED 0x00000000
124 #define B43_DMA64_RXSTAT_ACTIVE 0x10000000
125 #define B43_DMA64_RXSTAT_IDLEWAIT 0x20000000
126 #define B43_DMA64_RXSTAT_STOPPED 0x30000000
127 #define B43_DMA64_RXSTAT_SUSP 0x40000000
128 #define B43_DMA64_RXERROR 0x34
129 #define B43_DMA64_RXERRDPTR 0x0001FFFF
130 #define B43_DMA64_RXERR 0xF0000000
131 #define B43_DMA64_RXERR_NOERR 0x00000000
132 #define B43_DMA64_RXERR_PROT 0x10000000
133 #define B43_DMA64_RXERR_UNDERRUN 0x20000000
134 #define B43_DMA64_RXERR_TRANSFER 0x30000000
135 #define B43_DMA64_RXERR_DESCREAD 0x40000000
136 #define B43_DMA64_RXERR_CORE 0x50000000
138 /* 64-bit DMA descriptor. */
139 struct b43_dmadesc64 {
144 } __attribute__ ((__packed__));
145 #define B43_DMA64_DCTL0_DTABLEEND 0x10000000
146 #define B43_DMA64_DCTL0_IRQ 0x20000000
147 #define B43_DMA64_DCTL0_FRAMEEND 0x40000000
148 #define B43_DMA64_DCTL0_FRAMESTART 0x80000000
149 #define B43_DMA64_DCTL1_BYTECNT 0x00001FFF
150 #define B43_DMA64_DCTL1_ADDREXT_MASK 0x00030000
151 #define B43_DMA64_DCTL1_ADDREXT_SHIFT 16
153 struct b43_dmadesc_generic {
155 struct b43_dmadesc32 dma32;
156 struct b43_dmadesc64 dma64;
157 } __attribute__ ((__packed__));
158 } __attribute__ ((__packed__));
160 /* Misc DMA constants */
161 #define B43_DMA_RINGMEMSIZE PAGE_SIZE
162 #define B43_DMA0_RX_FRAMEOFFSET 30
164 /* DMA engine tuning knobs */
165 #define B43_TXRING_SLOTS 256
166 #define B43_RXRING_SLOTS 64
167 #define B43_DMA0_RX_BUFFERSIZE IEEE80211_MAX_FRAME_LEN
174 struct b43_dmadesc_meta {
175 /* The kernel DMA-able buffer. */
177 /* DMA base bus-address of the descriptor buffer. */
179 /* ieee80211 TX status. Only used once per 802.11 frag. */
180 bool is_last_fragment;
185 /* Lowlevel DMA operations that differ between 32bit and 64bit DMA. */
187 struct b43_dmadesc_generic *(*idx2desc) (struct b43_dmaring * ring,
189 struct b43_dmadesc_meta **
191 void (*fill_descriptor) (struct b43_dmaring * ring,
192 struct b43_dmadesc_generic * desc,
193 dma_addr_t dmaaddr, u16 bufsize, int start,
195 void (*poke_tx) (struct b43_dmaring * ring, int slot);
196 void (*tx_suspend) (struct b43_dmaring * ring);
197 void (*tx_resume) (struct b43_dmaring * ring);
198 int (*get_current_rxslot) (struct b43_dmaring * ring);
199 void (*set_current_rxslot) (struct b43_dmaring * ring, int slot);
209 /* Lowlevel DMA ops. */
210 const struct b43_dma_ops *ops;
211 /* Kernel virtual base address of the ring memory. */
213 /* Meta data about all descriptors. */
214 struct b43_dmadesc_meta *meta;
215 /* Cache of TX headers for each TX frame.
216 * This is to avoid an allocation on each TX.
217 * This is NULL for an RX ring.
220 /* (Unadjusted) DMA base bus-address of the ring memory. */
222 /* Number of descriptor slots in the ring. */
224 /* Number of used descriptor slots. */
226 /* Currently used slot in the ring. */
228 /* Total number of packets sent. Statistics only. */
229 unsigned int nr_tx_packets;
230 /* Frameoffset in octets. */
232 /* Descriptor buffer size. */
234 /* The MMIO base register of the DMA controller. */
236 /* DMA controller index number (0-5). */
238 /* Boolean. Is this a TX ring? */
240 /* The type of DMA engine used. */
241 enum b43_dmatype type;
242 /* Boolean. Is this ring stopped at ieee80211 level? */
244 /* The QOS priority assigned to this ring. Only used for TX rings.
245 * This is the mac80211 "queue" value. */
247 /* Lock, only used for TX. */
249 struct b43_wldev *dev;
250 #ifdef CONFIG_B43_DEBUG
251 /* Maximum number of used slots. */
253 /* Last time we injected a ring overflow. */
254 unsigned long last_injected_overflow;
255 /* Statistics: Number of successfully transmitted packets */
256 u64 nr_succeed_tx_packets;
257 /* Statistics: Number of failed TX packets */
258 u64 nr_failed_tx_packets;
259 /* Statistics: Total number of TX plus all retries. */
260 u64 nr_total_packet_tries;
261 #endif /* CONFIG_B43_DEBUG */
264 static inline u32 b43_dma_read(struct b43_dmaring *ring, u16 offset)
266 return b43_read32(ring->dev, ring->mmio_base + offset);
269 static inline void b43_dma_write(struct b43_dmaring *ring, u16 offset, u32 value)
271 b43_write32(ring->dev, ring->mmio_base + offset, value);
274 int b43_dma_init(struct b43_wldev *dev);
275 void b43_dma_free(struct b43_wldev *dev);
277 void b43_dma_tx_suspend(struct b43_wldev *dev);
278 void b43_dma_tx_resume(struct b43_wldev *dev);
280 void b43_dma_get_tx_stats(struct b43_wldev *dev,
281 struct ieee80211_tx_queue_stats *stats);
283 int b43_dma_tx(struct b43_wldev *dev,
284 struct sk_buff *skb);
285 void b43_dma_handle_txstatus(struct b43_wldev *dev,
286 const struct b43_txstatus *status);
288 void b43_dma_rx(struct b43_dmaring *ring);
290 void b43_dma_direct_fifo_rx(struct b43_wldev *dev,
291 unsigned int engine_index, bool enable);
293 #endif /* B43_DMA_H_ */