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cfdda9d7 SW |
1 | /* |
2 | * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved. | |
3 | * | |
4 | * This software is available to you under a choice of one of two | |
5 | * licenses. You may choose to be licensed under the terms of the GNU | |
6 | * General Public License (GPL) Version 2, available from the file | |
7 | * COPYING in the main directory of this source tree, or the | |
8 | * OpenIB.org BSD license below: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or | |
11 | * without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistributions of source code must retain the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer. | |
17 | * - Redistributions in binary form must reproduce the above | |
18 | * copyright notice, this list of conditions and the following | |
19 | * disclaimer in the documentation and/or other materials | |
20 | * provided with the distribution. | |
21 | * | |
22 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
23 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
24 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
25 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
26 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
27 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
28 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
29 | * SOFTWARE. | |
30 | */ | |
31 | #ifndef __T4_H__ | |
32 | #define __T4_H__ | |
33 | ||
34 | #include "t4_hw.h" | |
35 | #include "t4_regs.h" | |
36 | #include "t4_msg.h" | |
37 | #include "t4fw_ri_api.h" | |
38 | ||
1cf24dce SW |
39 | #define T4_MAX_NUM_QP 65536 |
40 | #define T4_MAX_NUM_CQ 65536 | |
41 | #define T4_MAX_NUM_PD 65536 | |
f64b8843 SW |
42 | #define T4_EQ_STATUS_ENTRIES (L1_CACHE_BYTES > 64 ? 2 : 1) |
43 | #define T4_MAX_EQ_SIZE (65520 - T4_EQ_STATUS_ENTRIES) | |
44 | #define T4_MAX_IQ_SIZE (65520 - 1) | |
45 | #define T4_MAX_RQ_SIZE (8192 - T4_EQ_STATUS_ENTRIES) | |
46 | #define T4_MAX_SQ_SIZE (T4_MAX_EQ_SIZE - 1) | |
47 | #define T4_MAX_QP_DEPTH (T4_MAX_RQ_SIZE - 1) | |
48 | #define T4_MAX_CQ_DEPTH (T4_MAX_IQ_SIZE - 1) | |
cfdda9d7 | 49 | #define T4_MAX_NUM_STAG (1<<15) |
a2de1499 | 50 | #define T4_MAX_MR_SIZE (~0ULL) |
cfdda9d7 SW |
51 | #define T4_PAGESIZE_MASK 0xffff000 /* 4KB-128MB */ |
52 | #define T4_STAG_UNSET 0xffffffff | |
53 | #define T4_FW_MAJ 0 | |
54 | #define T4_EQ_STATUS_ENTRIES (L1_CACHE_BYTES > 64 ? 2 : 1) | |
c6d7b267 | 55 | #define A_PCIE_MA_SYNC 0x30b4 |
cfdda9d7 SW |
56 | |
57 | struct t4_status_page { | |
58 | __be32 rsvd1; /* flit 0 - hw owns */ | |
59 | __be16 rsvd2; | |
60 | __be16 qid; | |
61 | __be16 cidx; | |
62 | __be16 pidx; | |
63 | u8 qp_err; /* flit 1 - sw owns */ | |
64 | u8 db_off; | |
422eea0a VP |
65 | u8 pad; |
66 | u16 host_wq_pidx; | |
67 | u16 host_cidx; | |
68 | u16 host_pidx; | |
cfdda9d7 SW |
69 | }; |
70 | ||
d37ac31d | 71 | #define T4_EQ_ENTRY_SIZE 64 |
cfdda9d7 | 72 | |
40dbf6ee | 73 | #define T4_SQ_NUM_SLOTS 5 |
d37ac31d | 74 | #define T4_SQ_NUM_BYTES (T4_EQ_ENTRY_SIZE * T4_SQ_NUM_SLOTS) |
cfdda9d7 SW |
75 | #define T4_MAX_SEND_SGE ((T4_SQ_NUM_BYTES - sizeof(struct fw_ri_send_wr) - \ |
76 | sizeof(struct fw_ri_isgl)) / sizeof(struct fw_ri_sge)) | |
77 | #define T4_MAX_SEND_INLINE ((T4_SQ_NUM_BYTES - sizeof(struct fw_ri_send_wr) - \ | |
78 | sizeof(struct fw_ri_immd))) | |
79 | #define T4_MAX_WRITE_INLINE ((T4_SQ_NUM_BYTES - \ | |
80 | sizeof(struct fw_ri_rdma_write_wr) - \ | |
81 | sizeof(struct fw_ri_immd))) | |
82 | #define T4_MAX_WRITE_SGE ((T4_SQ_NUM_BYTES - \ | |
83 | sizeof(struct fw_ri_rdma_write_wr) - \ | |
84 | sizeof(struct fw_ri_isgl)) / sizeof(struct fw_ri_sge)) | |
85 | #define T4_MAX_FR_IMMD ((T4_SQ_NUM_BYTES - sizeof(struct fw_ri_fr_nsmr_wr) - \ | |
40dbf6ee | 86 | sizeof(struct fw_ri_immd)) & ~31UL) |
42b6a949 | 87 | #define T4_MAX_FR_DEPTH (1024 / sizeof(u64)) |
cfdda9d7 SW |
88 | |
89 | #define T4_RQ_NUM_SLOTS 2 | |
d37ac31d | 90 | #define T4_RQ_NUM_BYTES (T4_EQ_ENTRY_SIZE * T4_RQ_NUM_SLOTS) |
f64b8843 | 91 | #define T4_MAX_RECV_SGE 4 |
cfdda9d7 SW |
92 | |
93 | union t4_wr { | |
94 | struct fw_ri_res_wr res; | |
95 | struct fw_ri_wr ri; | |
96 | struct fw_ri_rdma_write_wr write; | |
97 | struct fw_ri_send_wr send; | |
98 | struct fw_ri_rdma_read_wr read; | |
99 | struct fw_ri_bind_mw_wr bind; | |
100 | struct fw_ri_fr_nsmr_wr fr; | |
101 | struct fw_ri_inv_lstag_wr inv; | |
102 | struct t4_status_page status; | |
d37ac31d | 103 | __be64 flits[T4_EQ_ENTRY_SIZE / sizeof(__be64) * T4_SQ_NUM_SLOTS]; |
cfdda9d7 SW |
104 | }; |
105 | ||
106 | union t4_recv_wr { | |
107 | struct fw_ri_recv_wr recv; | |
108 | struct t4_status_page status; | |
d37ac31d | 109 | __be64 flits[T4_EQ_ENTRY_SIZE / sizeof(__be64) * T4_RQ_NUM_SLOTS]; |
cfdda9d7 SW |
110 | }; |
111 | ||
112 | static inline void init_wr_hdr(union t4_wr *wqe, u16 wrid, | |
113 | enum fw_wr_opcodes opcode, u8 flags, u8 len16) | |
114 | { | |
cfdda9d7 SW |
115 | wqe->send.opcode = (u8)opcode; |
116 | wqe->send.flags = flags; | |
117 | wqe->send.wrid = wrid; | |
118 | wqe->send.r1[0] = 0; | |
119 | wqe->send.r1[1] = 0; | |
120 | wqe->send.r1[2] = 0; | |
121 | wqe->send.len16 = len16; | |
cfdda9d7 SW |
122 | } |
123 | ||
124 | /* CQE/AE status codes */ | |
125 | #define T4_ERR_SUCCESS 0x0 | |
126 | #define T4_ERR_STAG 0x1 /* STAG invalid: either the */ | |
127 | /* STAG is offlimt, being 0, */ | |
128 | /* or STAG_key mismatch */ | |
129 | #define T4_ERR_PDID 0x2 /* PDID mismatch */ | |
130 | #define T4_ERR_QPID 0x3 /* QPID mismatch */ | |
131 | #define T4_ERR_ACCESS 0x4 /* Invalid access right */ | |
132 | #define T4_ERR_WRAP 0x5 /* Wrap error */ | |
133 | #define T4_ERR_BOUND 0x6 /* base and bounds voilation */ | |
134 | #define T4_ERR_INVALIDATE_SHARED_MR 0x7 /* attempt to invalidate a */ | |
135 | /* shared memory region */ | |
136 | #define T4_ERR_INVALIDATE_MR_WITH_MW_BOUND 0x8 /* attempt to invalidate a */ | |
137 | /* shared memory region */ | |
138 | #define T4_ERR_ECC 0x9 /* ECC error detected */ | |
139 | #define T4_ERR_ECC_PSTAG 0xA /* ECC error detected when */ | |
140 | /* reading PSTAG for a MW */ | |
141 | /* Invalidate */ | |
142 | #define T4_ERR_PBL_ADDR_BOUND 0xB /* pbl addr out of bounds: */ | |
143 | /* software error */ | |
144 | #define T4_ERR_SWFLUSH 0xC /* SW FLUSHED */ | |
145 | #define T4_ERR_CRC 0x10 /* CRC error */ | |
146 | #define T4_ERR_MARKER 0x11 /* Marker error */ | |
147 | #define T4_ERR_PDU_LEN_ERR 0x12 /* invalid PDU length */ | |
148 | #define T4_ERR_OUT_OF_RQE 0x13 /* out of RQE */ | |
149 | #define T4_ERR_DDP_VERSION 0x14 /* wrong DDP version */ | |
150 | #define T4_ERR_RDMA_VERSION 0x15 /* wrong RDMA version */ | |
151 | #define T4_ERR_OPCODE 0x16 /* invalid rdma opcode */ | |
152 | #define T4_ERR_DDP_QUEUE_NUM 0x17 /* invalid ddp queue number */ | |
153 | #define T4_ERR_MSN 0x18 /* MSN error */ | |
154 | #define T4_ERR_TBIT 0x19 /* tag bit not set correctly */ | |
155 | #define T4_ERR_MO 0x1A /* MO not 0 for TERMINATE */ | |
156 | /* or READ_REQ */ | |
157 | #define T4_ERR_MSN_GAP 0x1B | |
158 | #define T4_ERR_MSN_RANGE 0x1C | |
159 | #define T4_ERR_IRD_OVERFLOW 0x1D | |
160 | #define T4_ERR_RQE_ADDR_BOUND 0x1E /* RQE addr out of bounds: */ | |
161 | /* software error */ | |
162 | #define T4_ERR_INTERNAL_ERR 0x1F /* internal error (opcode */ | |
163 | /* mismatch) */ | |
164 | /* | |
165 | * CQE defs | |
166 | */ | |
167 | struct t4_cqe { | |
168 | __be32 header; | |
169 | __be32 len; | |
170 | union { | |
171 | struct { | |
172 | __be32 stag; | |
173 | __be32 msn; | |
174 | } rcqe; | |
175 | struct { | |
176 | u32 nada1; | |
177 | u16 nada2; | |
178 | u16 cidx; | |
179 | } scqe; | |
180 | struct { | |
181 | __be32 wrid_hi; | |
182 | __be32 wrid_low; | |
183 | } gen; | |
184 | } u; | |
185 | __be64 reserved; | |
186 | __be64 bits_type_ts; | |
187 | }; | |
188 | ||
189 | /* macros for flit 0 of the cqe */ | |
190 | ||
191 | #define S_CQE_QPID 12 | |
192 | #define M_CQE_QPID 0xFFFFF | |
193 | #define G_CQE_QPID(x) ((((x) >> S_CQE_QPID)) & M_CQE_QPID) | |
194 | #define V_CQE_QPID(x) ((x)<<S_CQE_QPID) | |
195 | ||
196 | #define S_CQE_SWCQE 11 | |
197 | #define M_CQE_SWCQE 0x1 | |
198 | #define G_CQE_SWCQE(x) ((((x) >> S_CQE_SWCQE)) & M_CQE_SWCQE) | |
199 | #define V_CQE_SWCQE(x) ((x)<<S_CQE_SWCQE) | |
200 | ||
201 | #define S_CQE_STATUS 5 | |
202 | #define M_CQE_STATUS 0x1F | |
203 | #define G_CQE_STATUS(x) ((((x) >> S_CQE_STATUS)) & M_CQE_STATUS) | |
204 | #define V_CQE_STATUS(x) ((x)<<S_CQE_STATUS) | |
205 | ||
206 | #define S_CQE_TYPE 4 | |
207 | #define M_CQE_TYPE 0x1 | |
208 | #define G_CQE_TYPE(x) ((((x) >> S_CQE_TYPE)) & M_CQE_TYPE) | |
209 | #define V_CQE_TYPE(x) ((x)<<S_CQE_TYPE) | |
210 | ||
211 | #define S_CQE_OPCODE 0 | |
212 | #define M_CQE_OPCODE 0xF | |
213 | #define G_CQE_OPCODE(x) ((((x) >> S_CQE_OPCODE)) & M_CQE_OPCODE) | |
214 | #define V_CQE_OPCODE(x) ((x)<<S_CQE_OPCODE) | |
215 | ||
216 | #define SW_CQE(x) (G_CQE_SWCQE(be32_to_cpu((x)->header))) | |
217 | #define CQE_QPID(x) (G_CQE_QPID(be32_to_cpu((x)->header))) | |
218 | #define CQE_TYPE(x) (G_CQE_TYPE(be32_to_cpu((x)->header))) | |
219 | #define SQ_TYPE(x) (CQE_TYPE((x))) | |
220 | #define RQ_TYPE(x) (!CQE_TYPE((x))) | |
221 | #define CQE_STATUS(x) (G_CQE_STATUS(be32_to_cpu((x)->header))) | |
222 | #define CQE_OPCODE(x) (G_CQE_OPCODE(be32_to_cpu((x)->header))) | |
223 | ||
224 | #define CQE_SEND_OPCODE(x)( \ | |
225 | (G_CQE_OPCODE(be32_to_cpu((x)->header)) == FW_RI_SEND) || \ | |
226 | (G_CQE_OPCODE(be32_to_cpu((x)->header)) == FW_RI_SEND_WITH_SE) || \ | |
227 | (G_CQE_OPCODE(be32_to_cpu((x)->header)) == FW_RI_SEND_WITH_INV) || \ | |
228 | (G_CQE_OPCODE(be32_to_cpu((x)->header)) == FW_RI_SEND_WITH_SE_INV)) | |
229 | ||
230 | #define CQE_LEN(x) (be32_to_cpu((x)->len)) | |
231 | ||
232 | /* used for RQ completion processing */ | |
233 | #define CQE_WRID_STAG(x) (be32_to_cpu((x)->u.rcqe.stag)) | |
234 | #define CQE_WRID_MSN(x) (be32_to_cpu((x)->u.rcqe.msn)) | |
235 | ||
236 | /* used for SQ completion processing */ | |
237 | #define CQE_WRID_SQ_IDX(x) ((x)->u.scqe.cidx) | |
238 | ||
239 | /* generic accessor macros */ | |
240 | #define CQE_WRID_HI(x) ((x)->u.gen.wrid_hi) | |
241 | #define CQE_WRID_LOW(x) ((x)->u.gen.wrid_low) | |
242 | ||
243 | /* macros for flit 3 of the cqe */ | |
244 | #define S_CQE_GENBIT 63 | |
245 | #define M_CQE_GENBIT 0x1 | |
246 | #define G_CQE_GENBIT(x) (((x) >> S_CQE_GENBIT) & M_CQE_GENBIT) | |
247 | #define V_CQE_GENBIT(x) ((x)<<S_CQE_GENBIT) | |
248 | ||
249 | #define S_CQE_OVFBIT 62 | |
250 | #define M_CQE_OVFBIT 0x1 | |
251 | #define G_CQE_OVFBIT(x) ((((x) >> S_CQE_OVFBIT)) & M_CQE_OVFBIT) | |
252 | ||
253 | #define S_CQE_IQTYPE 60 | |
254 | #define M_CQE_IQTYPE 0x3 | |
255 | #define G_CQE_IQTYPE(x) ((((x) >> S_CQE_IQTYPE)) & M_CQE_IQTYPE) | |
256 | ||
257 | #define M_CQE_TS 0x0fffffffffffffffULL | |
258 | #define G_CQE_TS(x) ((x) & M_CQE_TS) | |
259 | ||
260 | #define CQE_OVFBIT(x) ((unsigned)G_CQE_OVFBIT(be64_to_cpu((x)->bits_type_ts))) | |
261 | #define CQE_GENBIT(x) ((unsigned)G_CQE_GENBIT(be64_to_cpu((x)->bits_type_ts))) | |
262 | #define CQE_TS(x) (G_CQE_TS(be64_to_cpu((x)->bits_type_ts))) | |
263 | ||
264 | struct t4_swsqe { | |
265 | u64 wr_id; | |
266 | struct t4_cqe cqe; | |
267 | int read_len; | |
268 | int opcode; | |
269 | int complete; | |
270 | int signaled; | |
271 | u16 idx; | |
1cf24dce | 272 | int flushed; |
cfdda9d7 SW |
273 | }; |
274 | ||
c6d7b267 SW |
275 | static inline pgprot_t t4_pgprot_wc(pgprot_t prot) |
276 | { | |
e297d9dd | 277 | #if defined(__i386__) || defined(__x86_64__) || defined(CONFIG_PPC64) |
c6d7b267 | 278 | return pgprot_writecombine(prot); |
c6d7b267 SW |
279 | #else |
280 | return pgprot_noncached(prot); | |
281 | #endif | |
282 | } | |
283 | ||
c6d7b267 SW |
284 | enum { |
285 | T4_SQ_ONCHIP = (1<<0), | |
286 | }; | |
287 | ||
cfdda9d7 SW |
288 | struct t4_sq { |
289 | union t4_wr *queue; | |
290 | dma_addr_t dma_addr; | |
f38926aa | 291 | DEFINE_DMA_UNMAP_ADDR(mapping); |
c6d7b267 | 292 | unsigned long phys_addr; |
cfdda9d7 SW |
293 | struct t4_swsqe *sw_sq; |
294 | struct t4_swsqe *oldest_read; | |
fa658a98 | 295 | u64 __iomem *udb; |
cfdda9d7 SW |
296 | size_t memsize; |
297 | u32 qid; | |
298 | u16 in_use; | |
299 | u16 size; | |
300 | u16 cidx; | |
301 | u16 pidx; | |
d37ac31d | 302 | u16 wq_pidx; |
05eb2389 | 303 | u16 wq_pidx_inc; |
c6d7b267 | 304 | u16 flags; |
1cf24dce | 305 | short flush_cidx; |
cfdda9d7 SW |
306 | }; |
307 | ||
308 | struct t4_swrqe { | |
309 | u64 wr_id; | |
310 | }; | |
311 | ||
312 | struct t4_rq { | |
313 | union t4_recv_wr *queue; | |
314 | dma_addr_t dma_addr; | |
f38926aa | 315 | DEFINE_DMA_UNMAP_ADDR(mapping); |
cfdda9d7 | 316 | struct t4_swrqe *sw_rq; |
fa658a98 | 317 | u64 __iomem *udb; |
cfdda9d7 SW |
318 | size_t memsize; |
319 | u32 qid; | |
320 | u32 msn; | |
321 | u32 rqt_hwaddr; | |
322 | u16 rqt_size; | |
323 | u16 in_use; | |
324 | u16 size; | |
325 | u16 cidx; | |
326 | u16 pidx; | |
d37ac31d | 327 | u16 wq_pidx; |
05eb2389 | 328 | u16 wq_pidx_inc; |
cfdda9d7 SW |
329 | }; |
330 | ||
331 | struct t4_wq { | |
332 | struct t4_sq sq; | |
333 | struct t4_rq rq; | |
334 | void __iomem *db; | |
335 | void __iomem *gts; | |
336 | struct c4iw_rdev *rdev; | |
1cf24dce | 337 | int flushed; |
cfdda9d7 SW |
338 | }; |
339 | ||
340 | static inline int t4_rqes_posted(struct t4_wq *wq) | |
341 | { | |
342 | return wq->rq.in_use; | |
343 | } | |
344 | ||
345 | static inline int t4_rq_empty(struct t4_wq *wq) | |
346 | { | |
347 | return wq->rq.in_use == 0; | |
348 | } | |
349 | ||
350 | static inline int t4_rq_full(struct t4_wq *wq) | |
351 | { | |
352 | return wq->rq.in_use == (wq->rq.size - 1); | |
353 | } | |
354 | ||
355 | static inline u32 t4_rq_avail(struct t4_wq *wq) | |
356 | { | |
357 | return wq->rq.size - 1 - wq->rq.in_use; | |
358 | } | |
359 | ||
d37ac31d | 360 | static inline void t4_rq_produce(struct t4_wq *wq, u8 len16) |
cfdda9d7 SW |
361 | { |
362 | wq->rq.in_use++; | |
363 | if (++wq->rq.pidx == wq->rq.size) | |
364 | wq->rq.pidx = 0; | |
d37ac31d SW |
365 | wq->rq.wq_pidx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE); |
366 | if (wq->rq.wq_pidx >= wq->rq.size * T4_RQ_NUM_SLOTS) | |
367 | wq->rq.wq_pidx %= wq->rq.size * T4_RQ_NUM_SLOTS; | |
cfdda9d7 SW |
368 | } |
369 | ||
370 | static inline void t4_rq_consume(struct t4_wq *wq) | |
371 | { | |
372 | wq->rq.in_use--; | |
373 | wq->rq.msn++; | |
374 | if (++wq->rq.cidx == wq->rq.size) | |
375 | wq->rq.cidx = 0; | |
376 | } | |
377 | ||
422eea0a VP |
378 | static inline u16 t4_rq_host_wq_pidx(struct t4_wq *wq) |
379 | { | |
380 | return wq->rq.queue[wq->rq.size].status.host_wq_pidx; | |
381 | } | |
382 | ||
383 | static inline u16 t4_rq_wq_size(struct t4_wq *wq) | |
384 | { | |
385 | return wq->rq.size * T4_RQ_NUM_SLOTS; | |
386 | } | |
387 | ||
c6d7b267 SW |
388 | static inline int t4_sq_onchip(struct t4_sq *sq) |
389 | { | |
390 | return sq->flags & T4_SQ_ONCHIP; | |
391 | } | |
392 | ||
cfdda9d7 SW |
393 | static inline int t4_sq_empty(struct t4_wq *wq) |
394 | { | |
395 | return wq->sq.in_use == 0; | |
396 | } | |
397 | ||
398 | static inline int t4_sq_full(struct t4_wq *wq) | |
399 | { | |
400 | return wq->sq.in_use == (wq->sq.size - 1); | |
401 | } | |
402 | ||
403 | static inline u32 t4_sq_avail(struct t4_wq *wq) | |
404 | { | |
405 | return wq->sq.size - 1 - wq->sq.in_use; | |
406 | } | |
407 | ||
d37ac31d | 408 | static inline void t4_sq_produce(struct t4_wq *wq, u8 len16) |
cfdda9d7 SW |
409 | { |
410 | wq->sq.in_use++; | |
411 | if (++wq->sq.pidx == wq->sq.size) | |
412 | wq->sq.pidx = 0; | |
d37ac31d SW |
413 | wq->sq.wq_pidx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE); |
414 | if (wq->sq.wq_pidx >= wq->sq.size * T4_SQ_NUM_SLOTS) | |
415 | wq->sq.wq_pidx %= wq->sq.size * T4_SQ_NUM_SLOTS; | |
cfdda9d7 SW |
416 | } |
417 | ||
418 | static inline void t4_sq_consume(struct t4_wq *wq) | |
419 | { | |
1cf24dce SW |
420 | BUG_ON(wq->sq.in_use < 1); |
421 | if (wq->sq.cidx == wq->sq.flush_cidx) | |
422 | wq->sq.flush_cidx = -1; | |
cfdda9d7 SW |
423 | wq->sq.in_use--; |
424 | if (++wq->sq.cidx == wq->sq.size) | |
425 | wq->sq.cidx = 0; | |
426 | } | |
427 | ||
422eea0a VP |
428 | static inline u16 t4_sq_host_wq_pidx(struct t4_wq *wq) |
429 | { | |
430 | return wq->sq.queue[wq->sq.size].status.host_wq_pidx; | |
431 | } | |
432 | ||
433 | static inline u16 t4_sq_wq_size(struct t4_wq *wq) | |
434 | { | |
435 | return wq->sq.size * T4_SQ_NUM_SLOTS; | |
436 | } | |
437 | ||
fa658a98 SW |
438 | /* This function copies 64 byte coalesced work request to memory |
439 | * mapped BAR2 space. For coalesced WRs, the SGE fetches data | |
440 | * from the FIFO instead of from Host. | |
441 | */ | |
442 | static inline void pio_copy(u64 __iomem *dst, u64 *src) | |
443 | { | |
444 | int count = 8; | |
445 | ||
446 | while (count) { | |
447 | writeq(*src, dst); | |
448 | src++; | |
449 | dst++; | |
450 | count--; | |
451 | } | |
452 | } | |
453 | ||
454 | static inline void t4_ring_sq_db(struct t4_wq *wq, u16 inc, u8 t5, | |
455 | union t4_wr *wqe) | |
cfdda9d7 | 456 | { |
fa658a98 SW |
457 | |
458 | /* Flush host queue memory writes. */ | |
cfdda9d7 | 459 | wmb(); |
fa658a98 SW |
460 | if (t5) { |
461 | if (inc == 1 && wqe) { | |
462 | PDBG("%s: WC wq->sq.pidx = %d\n", | |
463 | __func__, wq->sq.pidx); | |
464 | pio_copy(wq->sq.udb + 7, (void *)wqe); | |
465 | } else { | |
466 | PDBG("%s: DB wq->sq.pidx = %d\n", | |
467 | __func__, wq->sq.pidx); | |
468 | writel(PIDX_T5(inc), wq->sq.udb); | |
469 | } | |
470 | ||
471 | /* Flush user doorbell area writes. */ | |
472 | wmb(); | |
473 | return; | |
474 | } | |
cfdda9d7 SW |
475 | writel(QID(wq->sq.qid) | PIDX(inc), wq->db); |
476 | } | |
477 | ||
fa658a98 SW |
478 | static inline void t4_ring_rq_db(struct t4_wq *wq, u16 inc, u8 t5, |
479 | union t4_recv_wr *wqe) | |
cfdda9d7 | 480 | { |
fa658a98 SW |
481 | |
482 | /* Flush host queue memory writes. */ | |
cfdda9d7 | 483 | wmb(); |
fa658a98 SW |
484 | if (t5) { |
485 | if (inc == 1 && wqe) { | |
486 | PDBG("%s: WC wq->rq.pidx = %d\n", | |
487 | __func__, wq->rq.pidx); | |
488 | pio_copy(wq->rq.udb + 7, (void *)wqe); | |
489 | } else { | |
490 | PDBG("%s: DB wq->rq.pidx = %d\n", | |
491 | __func__, wq->rq.pidx); | |
492 | writel(PIDX_T5(inc), wq->rq.udb); | |
493 | } | |
494 | ||
495 | /* Flush user doorbell area writes. */ | |
496 | wmb(); | |
497 | return; | |
498 | } | |
cfdda9d7 SW |
499 | writel(QID(wq->rq.qid) | PIDX(inc), wq->db); |
500 | } | |
501 | ||
502 | static inline int t4_wq_in_error(struct t4_wq *wq) | |
503 | { | |
c6d7b267 | 504 | return wq->rq.queue[wq->rq.size].status.qp_err; |
cfdda9d7 SW |
505 | } |
506 | ||
507 | static inline void t4_set_wq_in_error(struct t4_wq *wq) | |
508 | { | |
cfdda9d7 SW |
509 | wq->rq.queue[wq->rq.size].status.qp_err = 1; |
510 | } | |
511 | ||
512 | static inline void t4_disable_wq_db(struct t4_wq *wq) | |
513 | { | |
cfdda9d7 SW |
514 | wq->rq.queue[wq->rq.size].status.db_off = 1; |
515 | } | |
516 | ||
517 | static inline void t4_enable_wq_db(struct t4_wq *wq) | |
518 | { | |
cfdda9d7 SW |
519 | wq->rq.queue[wq->rq.size].status.db_off = 0; |
520 | } | |
521 | ||
522 | static inline int t4_wq_db_enabled(struct t4_wq *wq) | |
523 | { | |
c6d7b267 | 524 | return !wq->rq.queue[wq->rq.size].status.db_off; |
cfdda9d7 SW |
525 | } |
526 | ||
527 | struct t4_cq { | |
528 | struct t4_cqe *queue; | |
529 | dma_addr_t dma_addr; | |
f38926aa | 530 | DEFINE_DMA_UNMAP_ADDR(mapping); |
cfdda9d7 SW |
531 | struct t4_cqe *sw_queue; |
532 | void __iomem *gts; | |
533 | struct c4iw_rdev *rdev; | |
534 | u64 ugts; | |
535 | size_t memsize; | |
84172dee | 536 | __be64 bits_type_ts; |
cfdda9d7 SW |
537 | u32 cqid; |
538 | u16 size; /* including status page */ | |
539 | u16 cidx; | |
540 | u16 sw_pidx; | |
541 | u16 sw_cidx; | |
542 | u16 sw_in_use; | |
543 | u16 cidx_inc; | |
544 | u8 gen; | |
545 | u8 error; | |
546 | }; | |
547 | ||
548 | static inline int t4_arm_cq(struct t4_cq *cq, int se) | |
549 | { | |
550 | u32 val; | |
7ec45b92 SW |
551 | |
552 | while (cq->cidx_inc > CIDXINC_MASK) { | |
553 | val = SEINTARM(0) | CIDXINC(CIDXINC_MASK) | TIMERREG(7) | | |
554 | INGRESSQID(cq->cqid); | |
be4c9bad | 555 | writel(val, cq->gts); |
7ec45b92 SW |
556 | cq->cidx_inc -= CIDXINC_MASK; |
557 | } | |
558 | val = SEINTARM(se) | CIDXINC(cq->cidx_inc) | TIMERREG(6) | | |
559 | INGRESSQID(cq->cqid); | |
560 | writel(val, cq->gts); | |
561 | cq->cidx_inc = 0; | |
cfdda9d7 SW |
562 | return 0; |
563 | } | |
564 | ||
565 | static inline void t4_swcq_produce(struct t4_cq *cq) | |
566 | { | |
567 | cq->sw_in_use++; | |
1cf24dce SW |
568 | if (cq->sw_in_use == cq->size) { |
569 | PDBG("%s cxgb4 sw cq overflow cqid %u\n", __func__, cq->cqid); | |
570 | cq->error = 1; | |
571 | BUG_ON(1); | |
572 | } | |
cfdda9d7 SW |
573 | if (++cq->sw_pidx == cq->size) |
574 | cq->sw_pidx = 0; | |
575 | } | |
576 | ||
577 | static inline void t4_swcq_consume(struct t4_cq *cq) | |
578 | { | |
1cf24dce | 579 | BUG_ON(cq->sw_in_use < 1); |
cfdda9d7 SW |
580 | cq->sw_in_use--; |
581 | if (++cq->sw_cidx == cq->size) | |
582 | cq->sw_cidx = 0; | |
583 | } | |
584 | ||
585 | static inline void t4_hwcq_consume(struct t4_cq *cq) | |
586 | { | |
84172dee | 587 | cq->bits_type_ts = cq->queue[cq->cidx].bits_type_ts; |
b298881f | 588 | if (++cq->cidx_inc == (cq->size >> 4) || cq->cidx_inc == CIDXINC_MASK) { |
ffc3f748 SW |
589 | u32 val; |
590 | ||
591 | val = SEINTARM(0) | CIDXINC(cq->cidx_inc) | TIMERREG(7) | | |
592 | INGRESSQID(cq->cqid); | |
593 | writel(val, cq->gts); | |
7ec45b92 | 594 | cq->cidx_inc = 0; |
ffc3f748 | 595 | } |
cfdda9d7 SW |
596 | if (++cq->cidx == cq->size) { |
597 | cq->cidx = 0; | |
598 | cq->gen ^= 1; | |
599 | } | |
600 | } | |
601 | ||
602 | static inline int t4_valid_cqe(struct t4_cq *cq, struct t4_cqe *cqe) | |
603 | { | |
604 | return (CQE_GENBIT(cqe) == cq->gen); | |
605 | } | |
606 | ||
607 | static inline int t4_next_hw_cqe(struct t4_cq *cq, struct t4_cqe **cqe) | |
608 | { | |
84172dee SW |
609 | int ret; |
610 | u16 prev_cidx; | |
cfdda9d7 | 611 | |
84172dee SW |
612 | if (cq->cidx == 0) |
613 | prev_cidx = cq->size - 1; | |
cfdda9d7 | 614 | else |
84172dee SW |
615 | prev_cidx = cq->cidx - 1; |
616 | ||
617 | if (cq->queue[prev_cidx].bits_type_ts != cq->bits_type_ts) { | |
618 | ret = -EOVERFLOW; | |
cfdda9d7 | 619 | cq->error = 1; |
84172dee | 620 | printk(KERN_ERR MOD "cq overflow cqid %u\n", cq->cqid); |
1cf24dce | 621 | BUG_ON(1); |
84172dee SW |
622 | } else if (t4_valid_cqe(cq, &cq->queue[cq->cidx])) { |
623 | *cqe = &cq->queue[cq->cidx]; | |
624 | ret = 0; | |
625 | } else | |
626 | ret = -ENODATA; | |
cfdda9d7 SW |
627 | return ret; |
628 | } | |
629 | ||
630 | static inline struct t4_cqe *t4_next_sw_cqe(struct t4_cq *cq) | |
631 | { | |
1cf24dce SW |
632 | if (cq->sw_in_use == cq->size) { |
633 | PDBG("%s cxgb4 sw cq overflow cqid %u\n", __func__, cq->cqid); | |
634 | cq->error = 1; | |
635 | BUG_ON(1); | |
636 | return NULL; | |
637 | } | |
cfdda9d7 SW |
638 | if (cq->sw_in_use) |
639 | return &cq->sw_queue[cq->sw_cidx]; | |
640 | return NULL; | |
641 | } | |
642 | ||
643 | static inline int t4_next_cqe(struct t4_cq *cq, struct t4_cqe **cqe) | |
644 | { | |
645 | int ret = 0; | |
646 | ||
647 | if (cq->error) | |
648 | ret = -ENODATA; | |
649 | else if (cq->sw_in_use) | |
650 | *cqe = &cq->sw_queue[cq->sw_cidx]; | |
651 | else | |
652 | ret = t4_next_hw_cqe(cq, cqe); | |
653 | return ret; | |
654 | } | |
655 | ||
656 | static inline int t4_cq_in_error(struct t4_cq *cq) | |
657 | { | |
658 | return ((struct t4_status_page *)&cq->queue[cq->size])->qp_err; | |
659 | } | |
660 | ||
661 | static inline void t4_set_cq_in_error(struct t4_cq *cq) | |
662 | { | |
663 | ((struct t4_status_page *)&cq->queue[cq->size])->qp_err = 1; | |
664 | } | |
665 | #endif | |
05eb2389 SW |
666 | |
667 | struct t4_dev_status_page { | |
668 | u8 db_off; | |
669 | }; |