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Commit | Line | Data |
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fa90c54f AV |
1 | /* |
2 | * QLogic Fibre Channel HBA Driver | |
01e58d8e | 3 | * Copyright (c) 2003-2008 QLogic Corporation |
1da177e4 | 4 | * |
fa90c54f AV |
5 | * See LICENSE.qla2xxx for copyright and licensing details. |
6 | */ | |
1da177e4 LT |
7 | #include "qla_def.h" |
8 | ||
9 | #include <linux/blkdev.h> | |
10 | #include <linux/delay.h> | |
11 | ||
12 | #include <scsi/scsi_tcq.h> | |
13 | ||
73208dfd AC |
14 | static request_t *qla2x00_req_pkt(struct scsi_qla_host *, struct req_que *, |
15 | struct rsp_que *rsp); | |
16 | static void qla2x00_isp_cmd(struct scsi_qla_host *, struct req_que *); | |
1da177e4 | 17 | |
68ca949c | 18 | static void qla25xx_set_que(srb_t *, struct req_que **, struct rsp_que **); |
1da177e4 LT |
19 | /** |
20 | * qla2x00_get_cmd_direction() - Determine control_flag data direction. | |
21 | * @cmd: SCSI command | |
22 | * | |
23 | * Returns the proper CF_* direction based on CDB. | |
24 | */ | |
25 | static inline uint16_t | |
49fd462a | 26 | qla2x00_get_cmd_direction(srb_t *sp) |
1da177e4 LT |
27 | { |
28 | uint16_t cflags; | |
29 | ||
30 | cflags = 0; | |
31 | ||
32 | /* Set transfer direction */ | |
49fd462a | 33 | if (sp->cmd->sc_data_direction == DMA_TO_DEVICE) { |
1da177e4 | 34 | cflags = CF_WRITE; |
e315cd28 | 35 | sp->fcport->vha->hw->qla_stats.output_bytes += |
49fd462a HZ |
36 | scsi_bufflen(sp->cmd); |
37 | } else if (sp->cmd->sc_data_direction == DMA_FROM_DEVICE) { | |
1da177e4 | 38 | cflags = CF_READ; |
e315cd28 | 39 | sp->fcport->vha->hw->qla_stats.input_bytes += |
49fd462a HZ |
40 | scsi_bufflen(sp->cmd); |
41 | } | |
1da177e4 LT |
42 | return (cflags); |
43 | } | |
44 | ||
45 | /** | |
46 | * qla2x00_calc_iocbs_32() - Determine number of Command Type 2 and | |
47 | * Continuation Type 0 IOCBs to allocate. | |
48 | * | |
49 | * @dsds: number of data segment decriptors needed | |
50 | * | |
51 | * Returns the number of IOCB entries needed to store @dsds. | |
52 | */ | |
53 | uint16_t | |
54 | qla2x00_calc_iocbs_32(uint16_t dsds) | |
55 | { | |
56 | uint16_t iocbs; | |
57 | ||
58 | iocbs = 1; | |
59 | if (dsds > 3) { | |
60 | iocbs += (dsds - 3) / 7; | |
61 | if ((dsds - 3) % 7) | |
62 | iocbs++; | |
63 | } | |
64 | return (iocbs); | |
65 | } | |
66 | ||
67 | /** | |
68 | * qla2x00_calc_iocbs_64() - Determine number of Command Type 3 and | |
69 | * Continuation Type 1 IOCBs to allocate. | |
70 | * | |
71 | * @dsds: number of data segment decriptors needed | |
72 | * | |
73 | * Returns the number of IOCB entries needed to store @dsds. | |
74 | */ | |
75 | uint16_t | |
76 | qla2x00_calc_iocbs_64(uint16_t dsds) | |
77 | { | |
78 | uint16_t iocbs; | |
79 | ||
80 | iocbs = 1; | |
81 | if (dsds > 2) { | |
82 | iocbs += (dsds - 2) / 5; | |
83 | if ((dsds - 2) % 5) | |
84 | iocbs++; | |
85 | } | |
86 | return (iocbs); | |
87 | } | |
88 | ||
89 | /** | |
90 | * qla2x00_prep_cont_type0_iocb() - Initialize a Continuation Type 0 IOCB. | |
91 | * @ha: HA context | |
92 | * | |
93 | * Returns a pointer to the Continuation Type 0 IOCB packet. | |
94 | */ | |
95 | static inline cont_entry_t * | |
73208dfd | 96 | qla2x00_prep_cont_type0_iocb(struct req_que *req, struct scsi_qla_host *vha) |
1da177e4 LT |
97 | { |
98 | cont_entry_t *cont_pkt; | |
1da177e4 | 99 | /* Adjust ring index. */ |
e315cd28 AC |
100 | req->ring_index++; |
101 | if (req->ring_index == req->length) { | |
102 | req->ring_index = 0; | |
103 | req->ring_ptr = req->ring; | |
1da177e4 | 104 | } else { |
e315cd28 | 105 | req->ring_ptr++; |
1da177e4 LT |
106 | } |
107 | ||
e315cd28 | 108 | cont_pkt = (cont_entry_t *)req->ring_ptr; |
1da177e4 LT |
109 | |
110 | /* Load packet defaults. */ | |
111 | *((uint32_t *)(&cont_pkt->entry_type)) = | |
112 | __constant_cpu_to_le32(CONTINUE_TYPE); | |
113 | ||
114 | return (cont_pkt); | |
115 | } | |
116 | ||
117 | /** | |
118 | * qla2x00_prep_cont_type1_iocb() - Initialize a Continuation Type 1 IOCB. | |
119 | * @ha: HA context | |
120 | * | |
121 | * Returns a pointer to the continuation type 1 IOCB packet. | |
122 | */ | |
123 | static inline cont_a64_entry_t * | |
73208dfd | 124 | qla2x00_prep_cont_type1_iocb(struct req_que *req, scsi_qla_host_t *vha) |
1da177e4 LT |
125 | { |
126 | cont_a64_entry_t *cont_pkt; | |
127 | ||
128 | /* Adjust ring index. */ | |
e315cd28 AC |
129 | req->ring_index++; |
130 | if (req->ring_index == req->length) { | |
131 | req->ring_index = 0; | |
132 | req->ring_ptr = req->ring; | |
1da177e4 | 133 | } else { |
e315cd28 | 134 | req->ring_ptr++; |
1da177e4 LT |
135 | } |
136 | ||
e315cd28 | 137 | cont_pkt = (cont_a64_entry_t *)req->ring_ptr; |
1da177e4 LT |
138 | |
139 | /* Load packet defaults. */ | |
140 | *((uint32_t *)(&cont_pkt->entry_type)) = | |
141 | __constant_cpu_to_le32(CONTINUE_A64_TYPE); | |
142 | ||
143 | return (cont_pkt); | |
144 | } | |
145 | ||
146 | /** | |
147 | * qla2x00_build_scsi_iocbs_32() - Build IOCB command utilizing 32bit | |
148 | * capable IOCB types. | |
149 | * | |
150 | * @sp: SRB command to process | |
151 | * @cmd_pkt: Command type 2 IOCB | |
152 | * @tot_dsds: Total number of segments to transfer | |
153 | */ | |
154 | void qla2x00_build_scsi_iocbs_32(srb_t *sp, cmd_entry_t *cmd_pkt, | |
155 | uint16_t tot_dsds) | |
156 | { | |
157 | uint16_t avail_dsds; | |
158 | uint32_t *cur_dsd; | |
e315cd28 | 159 | scsi_qla_host_t *vha; |
1da177e4 | 160 | struct scsi_cmnd *cmd; |
385d70b4 FT |
161 | struct scatterlist *sg; |
162 | int i; | |
73208dfd | 163 | struct req_que *req; |
1da177e4 LT |
164 | |
165 | cmd = sp->cmd; | |
166 | ||
167 | /* Update entry type to indicate Command Type 2 IOCB */ | |
168 | *((uint32_t *)(&cmd_pkt->entry_type)) = | |
169 | __constant_cpu_to_le32(COMMAND_TYPE); | |
170 | ||
171 | /* No data transfer */ | |
385d70b4 | 172 | if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) { |
1da177e4 LT |
173 | cmd_pkt->byte_count = __constant_cpu_to_le32(0); |
174 | return; | |
175 | } | |
176 | ||
444786d7 | 177 | vha = sp->fcport->vha; |
17d98630 | 178 | req = sp->que; |
1da177e4 | 179 | |
49fd462a | 180 | cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(sp)); |
1da177e4 LT |
181 | |
182 | /* Three DSDs are available in the Command Type 2 IOCB */ | |
183 | avail_dsds = 3; | |
184 | cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address; | |
185 | ||
186 | /* Load data segments */ | |
385d70b4 FT |
187 | scsi_for_each_sg(cmd, sg, tot_dsds, i) { |
188 | cont_entry_t *cont_pkt; | |
189 | ||
190 | /* Allocate additional continuation packets? */ | |
191 | if (avail_dsds == 0) { | |
192 | /* | |
193 | * Seven DSDs are available in the Continuation | |
194 | * Type 0 IOCB. | |
195 | */ | |
73208dfd | 196 | cont_pkt = qla2x00_prep_cont_type0_iocb(req, vha); |
385d70b4 FT |
197 | cur_dsd = (uint32_t *)&cont_pkt->dseg_0_address; |
198 | avail_dsds = 7; | |
1da177e4 | 199 | } |
385d70b4 FT |
200 | |
201 | *cur_dsd++ = cpu_to_le32(sg_dma_address(sg)); | |
202 | *cur_dsd++ = cpu_to_le32(sg_dma_len(sg)); | |
203 | avail_dsds--; | |
1da177e4 LT |
204 | } |
205 | } | |
206 | ||
207 | /** | |
208 | * qla2x00_build_scsi_iocbs_64() - Build IOCB command utilizing 64bit | |
209 | * capable IOCB types. | |
210 | * | |
211 | * @sp: SRB command to process | |
212 | * @cmd_pkt: Command type 3 IOCB | |
213 | * @tot_dsds: Total number of segments to transfer | |
214 | */ | |
215 | void qla2x00_build_scsi_iocbs_64(srb_t *sp, cmd_entry_t *cmd_pkt, | |
216 | uint16_t tot_dsds) | |
217 | { | |
218 | uint16_t avail_dsds; | |
219 | uint32_t *cur_dsd; | |
e315cd28 | 220 | scsi_qla_host_t *vha; |
1da177e4 | 221 | struct scsi_cmnd *cmd; |
385d70b4 FT |
222 | struct scatterlist *sg; |
223 | int i; | |
73208dfd | 224 | struct req_que *req; |
1da177e4 LT |
225 | |
226 | cmd = sp->cmd; | |
227 | ||
228 | /* Update entry type to indicate Command Type 3 IOCB */ | |
229 | *((uint32_t *)(&cmd_pkt->entry_type)) = | |
230 | __constant_cpu_to_le32(COMMAND_A64_TYPE); | |
231 | ||
232 | /* No data transfer */ | |
385d70b4 | 233 | if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) { |
1da177e4 LT |
234 | cmd_pkt->byte_count = __constant_cpu_to_le32(0); |
235 | return; | |
236 | } | |
237 | ||
444786d7 | 238 | vha = sp->fcport->vha; |
17d98630 | 239 | req = sp->que; |
1da177e4 | 240 | |
49fd462a | 241 | cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(sp)); |
1da177e4 LT |
242 | |
243 | /* Two DSDs are available in the Command Type 3 IOCB */ | |
244 | avail_dsds = 2; | |
245 | cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address; | |
246 | ||
247 | /* Load data segments */ | |
385d70b4 FT |
248 | scsi_for_each_sg(cmd, sg, tot_dsds, i) { |
249 | dma_addr_t sle_dma; | |
250 | cont_a64_entry_t *cont_pkt; | |
251 | ||
252 | /* Allocate additional continuation packets? */ | |
253 | if (avail_dsds == 0) { | |
254 | /* | |
255 | * Five DSDs are available in the Continuation | |
256 | * Type 1 IOCB. | |
257 | */ | |
73208dfd | 258 | cont_pkt = qla2x00_prep_cont_type1_iocb(req, vha); |
385d70b4 FT |
259 | cur_dsd = (uint32_t *)cont_pkt->dseg_0_address; |
260 | avail_dsds = 5; | |
1da177e4 | 261 | } |
385d70b4 FT |
262 | |
263 | sle_dma = sg_dma_address(sg); | |
264 | *cur_dsd++ = cpu_to_le32(LSD(sle_dma)); | |
265 | *cur_dsd++ = cpu_to_le32(MSD(sle_dma)); | |
266 | *cur_dsd++ = cpu_to_le32(sg_dma_len(sg)); | |
267 | avail_dsds--; | |
1da177e4 LT |
268 | } |
269 | } | |
270 | ||
271 | /** | |
272 | * qla2x00_start_scsi() - Send a SCSI command to the ISP | |
273 | * @sp: command to send to the ISP | |
274 | * | |
cc3ef7bc | 275 | * Returns non-zero if a failure occurred, else zero. |
1da177e4 LT |
276 | */ |
277 | int | |
278 | qla2x00_start_scsi(srb_t *sp) | |
279 | { | |
385d70b4 | 280 | int ret, nseg; |
1da177e4 | 281 | unsigned long flags; |
e315cd28 | 282 | scsi_qla_host_t *vha; |
1da177e4 LT |
283 | struct scsi_cmnd *cmd; |
284 | uint32_t *clr_ptr; | |
285 | uint32_t index; | |
286 | uint32_t handle; | |
287 | cmd_entry_t *cmd_pkt; | |
1da177e4 LT |
288 | uint16_t cnt; |
289 | uint16_t req_cnt; | |
290 | uint16_t tot_dsds; | |
3d71644c | 291 | struct device_reg_2xxx __iomem *reg; |
e315cd28 AC |
292 | struct qla_hw_data *ha; |
293 | struct req_que *req; | |
73208dfd | 294 | struct rsp_que *rsp; |
1da177e4 LT |
295 | |
296 | /* Setup device pointers. */ | |
297 | ret = 0; | |
444786d7 | 298 | vha = sp->fcport->vha; |
e315cd28 | 299 | ha = vha->hw; |
3d71644c | 300 | reg = &ha->iobase->isp; |
1da177e4 | 301 | cmd = sp->cmd; |
73208dfd AC |
302 | req = ha->req_q_map[0]; |
303 | rsp = ha->rsp_q_map[0]; | |
83021920 AV |
304 | /* So we know we haven't pci_map'ed anything yet */ |
305 | tot_dsds = 0; | |
1da177e4 LT |
306 | |
307 | /* Send marker if required */ | |
e315cd28 | 308 | if (vha->marker_needed != 0) { |
73208dfd AC |
309 | if (qla2x00_marker(vha, req, rsp, 0, 0, MK_SYNC_ALL) |
310 | != QLA_SUCCESS) | |
1da177e4 | 311 | return (QLA_FUNCTION_FAILED); |
e315cd28 | 312 | vha->marker_needed = 0; |
1da177e4 LT |
313 | } |
314 | ||
315 | /* Acquire ring specific lock */ | |
c9c5ced9 | 316 | spin_lock_irqsave(&ha->hardware_lock, flags); |
1da177e4 LT |
317 | |
318 | /* Check for room in outstanding command list. */ | |
e315cd28 | 319 | handle = req->current_outstanding_cmd; |
1da177e4 LT |
320 | for (index = 1; index < MAX_OUTSTANDING_COMMANDS; index++) { |
321 | handle++; | |
322 | if (handle == MAX_OUTSTANDING_COMMANDS) | |
323 | handle = 1; | |
e315cd28 | 324 | if (!req->outstanding_cmds[handle]) |
1da177e4 LT |
325 | break; |
326 | } | |
327 | if (index == MAX_OUTSTANDING_COMMANDS) | |
328 | goto queuing_error; | |
329 | ||
83021920 | 330 | /* Map the sg table so we have an accurate count of sg entries needed */ |
2c3dfe3f SJ |
331 | if (scsi_sg_count(cmd)) { |
332 | nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd), | |
333 | scsi_sg_count(cmd), cmd->sc_data_direction); | |
334 | if (unlikely(!nseg)) | |
335 | goto queuing_error; | |
336 | } else | |
337 | nseg = 0; | |
338 | ||
385d70b4 | 339 | tot_dsds = nseg; |
83021920 | 340 | |
1da177e4 | 341 | /* Calculate the number of request entries needed. */ |
fd34f556 | 342 | req_cnt = ha->isp_ops->calc_req_entries(tot_dsds); |
e315cd28 | 343 | if (req->cnt < (req_cnt + 2)) { |
1da177e4 | 344 | cnt = RD_REG_WORD_RELAXED(ISP_REQ_Q_OUT(ha, reg)); |
e315cd28 AC |
345 | if (req->ring_index < cnt) |
346 | req->cnt = cnt - req->ring_index; | |
1da177e4 | 347 | else |
e315cd28 AC |
348 | req->cnt = req->length - |
349 | (req->ring_index - cnt); | |
1da177e4 | 350 | } |
e315cd28 | 351 | if (req->cnt < (req_cnt + 2)) |
1da177e4 LT |
352 | goto queuing_error; |
353 | ||
1da177e4 | 354 | /* Build command packet */ |
e315cd28 AC |
355 | req->current_outstanding_cmd = handle; |
356 | req->outstanding_cmds[handle] = sp; | |
17d98630 | 357 | sp->que = req; |
1da177e4 | 358 | sp->cmd->host_scribble = (unsigned char *)(unsigned long)handle; |
e315cd28 | 359 | req->cnt -= req_cnt; |
1da177e4 | 360 | |
e315cd28 | 361 | cmd_pkt = (cmd_entry_t *)req->ring_ptr; |
1da177e4 LT |
362 | cmd_pkt->handle = handle; |
363 | /* Zero out remaining portion of packet. */ | |
364 | clr_ptr = (uint32_t *)cmd_pkt + 2; | |
365 | memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8); | |
366 | cmd_pkt->dseg_count = cpu_to_le16(tot_dsds); | |
367 | ||
bdf79621 AV |
368 | /* Set target ID and LUN number*/ |
369 | SET_TARGET_ID(ha, cmd_pkt->target, sp->fcport->loop_id); | |
370 | cmd_pkt->lun = cpu_to_le16(sp->cmd->device->lun); | |
1da177e4 LT |
371 | |
372 | /* Update tagged queuing modifier */ | |
373 | cmd_pkt->control_flags = __constant_cpu_to_le16(CF_SIMPLE_TAG); | |
1da177e4 | 374 | |
1da177e4 LT |
375 | /* Load SCSI command packet. */ |
376 | memcpy(cmd_pkt->scsi_cdb, cmd->cmnd, cmd->cmd_len); | |
385d70b4 | 377 | cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd)); |
1da177e4 LT |
378 | |
379 | /* Build IOCB segments */ | |
fd34f556 | 380 | ha->isp_ops->build_iocbs(sp, cmd_pkt, tot_dsds); |
1da177e4 LT |
381 | |
382 | /* Set total data segment count. */ | |
383 | cmd_pkt->entry_count = (uint8_t)req_cnt; | |
384 | wmb(); | |
385 | ||
386 | /* Adjust ring index. */ | |
e315cd28 AC |
387 | req->ring_index++; |
388 | if (req->ring_index == req->length) { | |
389 | req->ring_index = 0; | |
390 | req->ring_ptr = req->ring; | |
1da177e4 | 391 | } else |
e315cd28 | 392 | req->ring_ptr++; |
1da177e4 | 393 | |
1da177e4 | 394 | sp->flags |= SRB_DMA_VALID; |
1da177e4 LT |
395 | |
396 | /* Set chip new ring index. */ | |
e315cd28 | 397 | WRT_REG_WORD(ISP_REQ_Q_IN(ha, reg), req->ring_index); |
1da177e4 LT |
398 | RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, reg)); /* PCI Posting. */ |
399 | ||
4fdfefe5 | 400 | /* Manage unprocessed RIO/ZIO commands in response queue. */ |
e315cd28 | 401 | if (vha->flags.process_response_queue && |
73208dfd AC |
402 | rsp->ring_ptr->signature != RESPONSE_PROCESSED) |
403 | qla2x00_process_response_queue(rsp); | |
4fdfefe5 | 404 | |
c9c5ced9 | 405 | spin_unlock_irqrestore(&ha->hardware_lock, flags); |
1da177e4 LT |
406 | return (QLA_SUCCESS); |
407 | ||
408 | queuing_error: | |
385d70b4 FT |
409 | if (tot_dsds) |
410 | scsi_dma_unmap(cmd); | |
411 | ||
c9c5ced9 | 412 | spin_unlock_irqrestore(&ha->hardware_lock, flags); |
1da177e4 LT |
413 | |
414 | return (QLA_FUNCTION_FAILED); | |
415 | } | |
416 | ||
417 | /** | |
418 | * qla2x00_marker() - Send a marker IOCB to the firmware. | |
419 | * @ha: HA context | |
420 | * @loop_id: loop ID | |
421 | * @lun: LUN | |
422 | * @type: marker modifier | |
423 | * | |
424 | * Can be called from both normal and interrupt context. | |
425 | * | |
cc3ef7bc | 426 | * Returns non-zero if a failure occurred, else zero. |
1da177e4 | 427 | */ |
fa2a1ce5 | 428 | int |
73208dfd AC |
429 | __qla2x00_marker(struct scsi_qla_host *vha, struct req_que *req, |
430 | struct rsp_que *rsp, uint16_t loop_id, | |
431 | uint16_t lun, uint8_t type) | |
1da177e4 | 432 | { |
2b6c0cee AV |
433 | mrk_entry_t *mrk; |
434 | struct mrk_entry_24xx *mrk24; | |
e315cd28 AC |
435 | struct qla_hw_data *ha = vha->hw; |
436 | scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev); | |
1da177e4 | 437 | |
2b6c0cee | 438 | mrk24 = NULL; |
73208dfd | 439 | mrk = (mrk_entry_t *)qla2x00_req_pkt(vha, req, rsp); |
2b6c0cee AV |
440 | if (mrk == NULL) { |
441 | DEBUG2_3(printk("%s(%ld): failed to allocate Marker IOCB.\n", | |
e315cd28 | 442 | __func__, base_vha->host_no)); |
1da177e4 LT |
443 | |
444 | return (QLA_FUNCTION_FAILED); | |
445 | } | |
446 | ||
2b6c0cee AV |
447 | mrk->entry_type = MARKER_TYPE; |
448 | mrk->modifier = type; | |
1da177e4 | 449 | if (type != MK_SYNC_ALL) { |
e428924c | 450 | if (IS_FWI2_CAPABLE(ha)) { |
2b6c0cee AV |
451 | mrk24 = (struct mrk_entry_24xx *) mrk; |
452 | mrk24->nport_handle = cpu_to_le16(loop_id); | |
453 | mrk24->lun[1] = LSB(lun); | |
454 | mrk24->lun[2] = MSB(lun); | |
b797b6de | 455 | host_to_fcp_swap(mrk24->lun, sizeof(mrk24->lun)); |
e315cd28 | 456 | mrk24->vp_index = vha->vp_idx; |
2afa19a9 | 457 | mrk24->handle = MAKE_HANDLE(req->id, mrk24->handle); |
2b6c0cee AV |
458 | } else { |
459 | SET_TARGET_ID(ha, mrk->target, loop_id); | |
460 | mrk->lun = cpu_to_le16(lun); | |
461 | } | |
1da177e4 LT |
462 | } |
463 | wmb(); | |
464 | ||
73208dfd | 465 | qla2x00_isp_cmd(vha, req); |
1da177e4 LT |
466 | |
467 | return (QLA_SUCCESS); | |
468 | } | |
469 | ||
fa2a1ce5 | 470 | int |
73208dfd AC |
471 | qla2x00_marker(struct scsi_qla_host *vha, struct req_que *req, |
472 | struct rsp_que *rsp, uint16_t loop_id, uint16_t lun, | |
473 | uint8_t type) | |
1da177e4 LT |
474 | { |
475 | int ret; | |
476 | unsigned long flags = 0; | |
477 | ||
73208dfd AC |
478 | spin_lock_irqsave(&vha->hw->hardware_lock, flags); |
479 | ret = __qla2x00_marker(vha, req, rsp, loop_id, lun, type); | |
480 | spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); | |
1da177e4 LT |
481 | |
482 | return (ret); | |
483 | } | |
484 | ||
485 | /** | |
486 | * qla2x00_req_pkt() - Retrieve a request packet from the request ring. | |
487 | * @ha: HA context | |
488 | * | |
489 | * Note: The caller must hold the hardware lock before calling this routine. | |
490 | * | |
491 | * Returns NULL if function failed, else, a pointer to the request packet. | |
492 | */ | |
493 | static request_t * | |
73208dfd AC |
494 | qla2x00_req_pkt(struct scsi_qla_host *vha, struct req_que *req, |
495 | struct rsp_que *rsp) | |
1da177e4 | 496 | { |
e315cd28 | 497 | struct qla_hw_data *ha = vha->hw; |
73208dfd | 498 | device_reg_t __iomem *reg = ISP_QUE_REG(ha, req->id); |
1da177e4 LT |
499 | request_t *pkt = NULL; |
500 | uint16_t cnt; | |
501 | uint32_t *dword_ptr; | |
502 | uint32_t timer; | |
503 | uint16_t req_cnt = 1; | |
504 | ||
505 | /* Wait 1 second for slot. */ | |
506 | for (timer = HZ; timer; timer--) { | |
e315cd28 | 507 | if ((req_cnt + 2) >= req->cnt) { |
1da177e4 | 508 | /* Calculate number of free request entries. */ |
73208dfd AC |
509 | if (ha->mqenable) |
510 | cnt = (uint16_t) | |
511 | RD_REG_DWORD(®->isp25mq.req_q_out); | |
512 | else { | |
513 | if (IS_FWI2_CAPABLE(ha)) | |
514 | cnt = (uint16_t)RD_REG_DWORD( | |
515 | ®->isp24.req_q_out); | |
516 | else | |
517 | cnt = qla2x00_debounce_register( | |
518 | ISP_REQ_Q_OUT(ha, ®->isp)); | |
519 | } | |
e315cd28 AC |
520 | if (req->ring_index < cnt) |
521 | req->cnt = cnt - req->ring_index; | |
1da177e4 | 522 | else |
e315cd28 AC |
523 | req->cnt = req->length - |
524 | (req->ring_index - cnt); | |
1da177e4 LT |
525 | } |
526 | /* If room for request in request ring. */ | |
e315cd28 AC |
527 | if ((req_cnt + 2) < req->cnt) { |
528 | req->cnt--; | |
529 | pkt = req->ring_ptr; | |
1da177e4 LT |
530 | |
531 | /* Zero out packet. */ | |
532 | dword_ptr = (uint32_t *)pkt; | |
533 | for (cnt = 0; cnt < REQUEST_ENTRY_SIZE / 4; cnt++) | |
534 | *dword_ptr++ = 0; | |
535 | ||
1da177e4 LT |
536 | /* Set entry count. */ |
537 | pkt->entry_count = 1; | |
538 | ||
539 | break; | |
540 | } | |
541 | ||
542 | /* Release ring specific lock */ | |
e315cd28 | 543 | spin_unlock_irq(&ha->hardware_lock); |
1da177e4 LT |
544 | |
545 | udelay(2); /* 2 us */ | |
546 | ||
547 | /* Check for pending interrupts. */ | |
548 | /* During init we issue marker directly */ | |
e315cd28 | 549 | if (!vha->marker_needed && !vha->flags.init_done) |
73208dfd | 550 | qla2x00_poll(rsp); |
1da177e4 LT |
551 | spin_lock_irq(&ha->hardware_lock); |
552 | } | |
553 | if (!pkt) { | |
554 | DEBUG2_3(printk("%s(): **** FAILED ****\n", __func__)); | |
555 | } | |
556 | ||
557 | return (pkt); | |
558 | } | |
559 | ||
560 | /** | |
561 | * qla2x00_isp_cmd() - Modify the request ring pointer. | |
562 | * @ha: HA context | |
563 | * | |
564 | * Note: The caller must hold the hardware lock before calling this routine. | |
565 | */ | |
413975a0 | 566 | static void |
73208dfd | 567 | qla2x00_isp_cmd(struct scsi_qla_host *vha, struct req_que *req) |
1da177e4 | 568 | { |
e315cd28 | 569 | struct qla_hw_data *ha = vha->hw; |
73208dfd | 570 | device_reg_t __iomem *reg = ISP_QUE_REG(ha, req->id); |
17d98630 | 571 | struct device_reg_2xxx __iomem *ioreg = &ha->iobase->isp; |
1da177e4 LT |
572 | |
573 | DEBUG5(printk("%s(): IOCB data:\n", __func__)); | |
574 | DEBUG5(qla2x00_dump_buffer( | |
e315cd28 | 575 | (uint8_t *)req->ring_ptr, REQUEST_ENTRY_SIZE)); |
1da177e4 LT |
576 | |
577 | /* Adjust ring index. */ | |
e315cd28 AC |
578 | req->ring_index++; |
579 | if (req->ring_index == req->length) { | |
580 | req->ring_index = 0; | |
581 | req->ring_ptr = req->ring; | |
1da177e4 | 582 | } else |
e315cd28 | 583 | req->ring_ptr++; |
1da177e4 LT |
584 | |
585 | /* Set chip new ring index. */ | |
17d98630 AC |
586 | if (ha->mqenable) { |
587 | WRT_REG_DWORD(®->isp25mq.req_q_in, req->ring_index); | |
588 | RD_REG_DWORD(&ioreg->hccr); | |
589 | } | |
73208dfd AC |
590 | else { |
591 | if (IS_FWI2_CAPABLE(ha)) { | |
592 | WRT_REG_DWORD(®->isp24.req_q_in, req->ring_index); | |
593 | RD_REG_DWORD_RELAXED(®->isp24.req_q_in); | |
594 | } else { | |
595 | WRT_REG_WORD(ISP_REQ_Q_IN(ha, ®->isp), | |
596 | req->ring_index); | |
597 | RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, ®->isp)); | |
598 | } | |
2b6c0cee AV |
599 | } |
600 | ||
601 | } | |
602 | ||
603 | /** | |
604 | * qla24xx_calc_iocbs() - Determine number of Command Type 3 and | |
605 | * Continuation Type 1 IOCBs to allocate. | |
606 | * | |
607 | * @dsds: number of data segment decriptors needed | |
608 | * | |
609 | * Returns the number of IOCB entries needed to store @dsds. | |
610 | */ | |
611 | static inline uint16_t | |
612 | qla24xx_calc_iocbs(uint16_t dsds) | |
613 | { | |
614 | uint16_t iocbs; | |
615 | ||
616 | iocbs = 1; | |
617 | if (dsds > 1) { | |
618 | iocbs += (dsds - 1) / 5; | |
619 | if ((dsds - 1) % 5) | |
620 | iocbs++; | |
621 | } | |
622 | return iocbs; | |
623 | } | |
624 | ||
625 | /** | |
626 | * qla24xx_build_scsi_iocbs() - Build IOCB command utilizing Command Type 7 | |
627 | * IOCB types. | |
628 | * | |
629 | * @sp: SRB command to process | |
630 | * @cmd_pkt: Command type 3 IOCB | |
631 | * @tot_dsds: Total number of segments to transfer | |
632 | */ | |
633 | static inline void | |
634 | qla24xx_build_scsi_iocbs(srb_t *sp, struct cmd_type_7 *cmd_pkt, | |
635 | uint16_t tot_dsds) | |
636 | { | |
637 | uint16_t avail_dsds; | |
638 | uint32_t *cur_dsd; | |
e315cd28 | 639 | scsi_qla_host_t *vha; |
2b6c0cee | 640 | struct scsi_cmnd *cmd; |
385d70b4 FT |
641 | struct scatterlist *sg; |
642 | int i; | |
73208dfd | 643 | struct req_que *req; |
2b6c0cee AV |
644 | |
645 | cmd = sp->cmd; | |
646 | ||
647 | /* Update entry type to indicate Command Type 3 IOCB */ | |
648 | *((uint32_t *)(&cmd_pkt->entry_type)) = | |
649 | __constant_cpu_to_le32(COMMAND_TYPE_7); | |
650 | ||
651 | /* No data transfer */ | |
385d70b4 | 652 | if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) { |
2b6c0cee AV |
653 | cmd_pkt->byte_count = __constant_cpu_to_le32(0); |
654 | return; | |
655 | } | |
656 | ||
444786d7 | 657 | vha = sp->fcport->vha; |
17d98630 | 658 | req = sp->que; |
2b6c0cee AV |
659 | |
660 | /* Set transfer direction */ | |
49fd462a | 661 | if (cmd->sc_data_direction == DMA_TO_DEVICE) { |
2b6c0cee AV |
662 | cmd_pkt->task_mgmt_flags = |
663 | __constant_cpu_to_le16(TMF_WRITE_DATA); | |
e315cd28 | 664 | sp->fcport->vha->hw->qla_stats.output_bytes += |
49fd462a HZ |
665 | scsi_bufflen(sp->cmd); |
666 | } else if (cmd->sc_data_direction == DMA_FROM_DEVICE) { | |
2b6c0cee AV |
667 | cmd_pkt->task_mgmt_flags = |
668 | __constant_cpu_to_le16(TMF_READ_DATA); | |
e315cd28 | 669 | sp->fcport->vha->hw->qla_stats.input_bytes += |
49fd462a HZ |
670 | scsi_bufflen(sp->cmd); |
671 | } | |
2b6c0cee AV |
672 | |
673 | /* One DSD is available in the Command Type 3 IOCB */ | |
674 | avail_dsds = 1; | |
675 | cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address; | |
676 | ||
677 | /* Load data segments */ | |
385d70b4 FT |
678 | |
679 | scsi_for_each_sg(cmd, sg, tot_dsds, i) { | |
680 | dma_addr_t sle_dma; | |
681 | cont_a64_entry_t *cont_pkt; | |
682 | ||
683 | /* Allocate additional continuation packets? */ | |
684 | if (avail_dsds == 0) { | |
685 | /* | |
686 | * Five DSDs are available in the Continuation | |
687 | * Type 1 IOCB. | |
688 | */ | |
73208dfd | 689 | cont_pkt = qla2x00_prep_cont_type1_iocb(req, vha); |
385d70b4 FT |
690 | cur_dsd = (uint32_t *)cont_pkt->dseg_0_address; |
691 | avail_dsds = 5; | |
2b6c0cee | 692 | } |
385d70b4 FT |
693 | |
694 | sle_dma = sg_dma_address(sg); | |
695 | *cur_dsd++ = cpu_to_le32(LSD(sle_dma)); | |
696 | *cur_dsd++ = cpu_to_le32(MSD(sle_dma)); | |
697 | *cur_dsd++ = cpu_to_le32(sg_dma_len(sg)); | |
698 | avail_dsds--; | |
2b6c0cee AV |
699 | } |
700 | } | |
701 | ||
702 | ||
703 | /** | |
704 | * qla24xx_start_scsi() - Send a SCSI command to the ISP | |
705 | * @sp: command to send to the ISP | |
706 | * | |
cc3ef7bc | 707 | * Returns non-zero if a failure occurred, else zero. |
2b6c0cee AV |
708 | */ |
709 | int | |
710 | qla24xx_start_scsi(srb_t *sp) | |
711 | { | |
385d70b4 | 712 | int ret, nseg; |
2b6c0cee | 713 | unsigned long flags; |
2b6c0cee AV |
714 | uint32_t *clr_ptr; |
715 | uint32_t index; | |
716 | uint32_t handle; | |
717 | struct cmd_type_7 *cmd_pkt; | |
2b6c0cee AV |
718 | uint16_t cnt; |
719 | uint16_t req_cnt; | |
720 | uint16_t tot_dsds; | |
73208dfd AC |
721 | struct req_que *req = NULL; |
722 | struct rsp_que *rsp = NULL; | |
723 | struct scsi_cmnd *cmd = sp->cmd; | |
444786d7 | 724 | struct scsi_qla_host *vha = sp->fcport->vha; |
73208dfd | 725 | struct qla_hw_data *ha = vha->hw; |
2b6c0cee AV |
726 | |
727 | /* Setup device pointers. */ | |
728 | ret = 0; | |
73208dfd | 729 | |
68ca949c | 730 | qla25xx_set_que(sp, &req, &rsp); |
17d98630 | 731 | sp->que = req; |
73208dfd | 732 | |
2b6c0cee AV |
733 | /* So we know we haven't pci_map'ed anything yet */ |
734 | tot_dsds = 0; | |
735 | ||
736 | /* Send marker if required */ | |
e315cd28 | 737 | if (vha->marker_needed != 0) { |
73208dfd AC |
738 | if (qla2x00_marker(vha, req, rsp, 0, 0, MK_SYNC_ALL) |
739 | != QLA_SUCCESS) | |
2b6c0cee | 740 | return QLA_FUNCTION_FAILED; |
e315cd28 | 741 | vha->marker_needed = 0; |
2b6c0cee AV |
742 | } |
743 | ||
744 | /* Acquire ring specific lock */ | |
e315cd28 | 745 | spin_lock_irqsave(&ha->hardware_lock, flags); |
2b6c0cee AV |
746 | |
747 | /* Check for room in outstanding command list. */ | |
e315cd28 | 748 | handle = req->current_outstanding_cmd; |
2b6c0cee AV |
749 | for (index = 1; index < MAX_OUTSTANDING_COMMANDS; index++) { |
750 | handle++; | |
751 | if (handle == MAX_OUTSTANDING_COMMANDS) | |
752 | handle = 1; | |
e315cd28 | 753 | if (!req->outstanding_cmds[handle]) |
2b6c0cee AV |
754 | break; |
755 | } | |
756 | if (index == MAX_OUTSTANDING_COMMANDS) | |
757 | goto queuing_error; | |
758 | ||
759 | /* Map the sg table so we have an accurate count of sg entries needed */ | |
2c3dfe3f SJ |
760 | if (scsi_sg_count(cmd)) { |
761 | nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd), | |
762 | scsi_sg_count(cmd), cmd->sc_data_direction); | |
763 | if (unlikely(!nseg)) | |
2b6c0cee | 764 | goto queuing_error; |
2c3dfe3f SJ |
765 | } else |
766 | nseg = 0; | |
767 | ||
385d70b4 | 768 | tot_dsds = nseg; |
2b6c0cee AV |
769 | |
770 | req_cnt = qla24xx_calc_iocbs(tot_dsds); | |
e315cd28 | 771 | if (req->cnt < (req_cnt + 2)) { |
08029990 | 772 | cnt = RD_REG_DWORD_RELAXED(req->req_q_out); |
73208dfd | 773 | |
e315cd28 AC |
774 | if (req->ring_index < cnt) |
775 | req->cnt = cnt - req->ring_index; | |
2b6c0cee | 776 | else |
e315cd28 AC |
777 | req->cnt = req->length - |
778 | (req->ring_index - cnt); | |
2b6c0cee | 779 | } |
e315cd28 | 780 | if (req->cnt < (req_cnt + 2)) |
2b6c0cee | 781 | goto queuing_error; |
2b6c0cee AV |
782 | |
783 | /* Build command packet. */ | |
e315cd28 AC |
784 | req->current_outstanding_cmd = handle; |
785 | req->outstanding_cmds[handle] = sp; | |
2b6c0cee | 786 | sp->cmd->host_scribble = (unsigned char *)(unsigned long)handle; |
e315cd28 | 787 | req->cnt -= req_cnt; |
2b6c0cee | 788 | |
e315cd28 | 789 | cmd_pkt = (struct cmd_type_7 *)req->ring_ptr; |
2afa19a9 | 790 | cmd_pkt->handle = MAKE_HANDLE(req->id, handle); |
2b6c0cee AV |
791 | |
792 | /* Zero out remaining portion of packet. */ | |
72df8325 | 793 | /* tagged queuing modifier -- default is TSK_SIMPLE (0). */ |
2b6c0cee AV |
794 | clr_ptr = (uint32_t *)cmd_pkt + 2; |
795 | memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8); | |
796 | cmd_pkt->dseg_count = cpu_to_le16(tot_dsds); | |
797 | ||
798 | /* Set NPORT-ID and LUN number*/ | |
799 | cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id); | |
800 | cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa; | |
801 | cmd_pkt->port_id[1] = sp->fcport->d_id.b.area; | |
802 | cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain; | |
2c3dfe3f | 803 | cmd_pkt->vp_index = sp->fcport->vp_idx; |
2b6c0cee | 804 | |
661c3f6c | 805 | int_to_scsilun(sp->cmd->device->lun, &cmd_pkt->lun); |
0d4be124 | 806 | host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun)); |
2b6c0cee | 807 | |
2b6c0cee AV |
808 | /* Load SCSI command packet. */ |
809 | memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len); | |
810 | host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb)); | |
811 | ||
385d70b4 | 812 | cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd)); |
2b6c0cee AV |
813 | |
814 | /* Build IOCB segments */ | |
815 | qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds); | |
816 | ||
817 | /* Set total data segment count. */ | |
818 | cmd_pkt->entry_count = (uint8_t)req_cnt; | |
2afa19a9 AC |
819 | /* Specify response queue number where completion should happen */ |
820 | cmd_pkt->entry_status = (uint8_t) rsp->id; | |
2b6c0cee AV |
821 | wmb(); |
822 | ||
823 | /* Adjust ring index. */ | |
e315cd28 AC |
824 | req->ring_index++; |
825 | if (req->ring_index == req->length) { | |
826 | req->ring_index = 0; | |
827 | req->ring_ptr = req->ring; | |
2b6c0cee | 828 | } else |
e315cd28 | 829 | req->ring_ptr++; |
2b6c0cee AV |
830 | |
831 | sp->flags |= SRB_DMA_VALID; | |
2b6c0cee AV |
832 | |
833 | /* Set chip new ring index. */ | |
08029990 AV |
834 | WRT_REG_DWORD(req->req_q_in, req->ring_index); |
835 | RD_REG_DWORD_RELAXED(&ha->iobase->isp24.hccr); | |
2b6c0cee | 836 | |
4fdfefe5 | 837 | /* Manage unprocessed RIO/ZIO commands in response queue. */ |
e315cd28 | 838 | if (vha->flags.process_response_queue && |
73208dfd | 839 | rsp->ring_ptr->signature != RESPONSE_PROCESSED) |
2afa19a9 | 840 | qla24xx_process_response_queue(vha, rsp); |
4fdfefe5 | 841 | |
e315cd28 | 842 | spin_unlock_irqrestore(&ha->hardware_lock, flags); |
2b6c0cee AV |
843 | return QLA_SUCCESS; |
844 | ||
845 | queuing_error: | |
385d70b4 FT |
846 | if (tot_dsds) |
847 | scsi_dma_unmap(cmd); | |
848 | ||
e315cd28 | 849 | spin_unlock_irqrestore(&ha->hardware_lock, flags); |
2b6c0cee AV |
850 | |
851 | return QLA_FUNCTION_FAILED; | |
1da177e4 | 852 | } |
68ca949c AC |
853 | |
854 | static void qla25xx_set_que(srb_t *sp, struct req_que **req, | |
855 | struct rsp_que **rsp) | |
856 | { | |
857 | struct scsi_cmnd *cmd = sp->cmd; | |
858 | struct scsi_qla_host *vha = sp->fcport->vha; | |
859 | struct qla_hw_data *ha = sp->fcport->vha->hw; | |
860 | int affinity = cmd->request->cpu; | |
861 | ||
862 | if (ql2xmultique_tag && affinity >= 0 && | |
863 | affinity < ha->max_rsp_queues - 1) { | |
864 | *rsp = ha->rsp_q_map[affinity + 1]; | |
865 | *req = ha->req_q_map[1]; | |
866 | } else { | |
867 | *req = vha->req; | |
868 | *rsp = ha->rsp_q_map[0]; | |
869 | } | |
870 | } |