Commit | Line | Data |
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fa90c54f AV |
1 | /* |
2 | * QLogic Fibre Channel HBA Driver | |
3 | * Copyright (c) 2003-2005 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 | ||
14 | static inline uint16_t qla2x00_get_cmd_direction(struct scsi_cmnd *cmd); | |
15 | static inline cont_entry_t *qla2x00_prep_cont_type0_iocb(scsi_qla_host_t *); | |
16 | static inline cont_a64_entry_t *qla2x00_prep_cont_type1_iocb(scsi_qla_host_t *); | |
17 | static request_t *qla2x00_req_pkt(scsi_qla_host_t *ha); | |
413975a0 | 18 | static void qla2x00_isp_cmd(scsi_qla_host_t *ha); |
1da177e4 LT |
19 | |
20 | /** | |
21 | * qla2x00_get_cmd_direction() - Determine control_flag data direction. | |
22 | * @cmd: SCSI command | |
23 | * | |
24 | * Returns the proper CF_* direction based on CDB. | |
25 | */ | |
26 | static inline uint16_t | |
27 | qla2x00_get_cmd_direction(struct scsi_cmnd *cmd) | |
28 | { | |
29 | uint16_t cflags; | |
30 | ||
31 | cflags = 0; | |
32 | ||
33 | /* Set transfer direction */ | |
34 | if (cmd->sc_data_direction == DMA_TO_DEVICE) | |
35 | cflags = CF_WRITE; | |
36 | else if (cmd->sc_data_direction == DMA_FROM_DEVICE) | |
37 | cflags = CF_READ; | |
38 | return (cflags); | |
39 | } | |
40 | ||
41 | /** | |
42 | * qla2x00_calc_iocbs_32() - Determine number of Command Type 2 and | |
43 | * Continuation Type 0 IOCBs to allocate. | |
44 | * | |
45 | * @dsds: number of data segment decriptors needed | |
46 | * | |
47 | * Returns the number of IOCB entries needed to store @dsds. | |
48 | */ | |
49 | uint16_t | |
50 | qla2x00_calc_iocbs_32(uint16_t dsds) | |
51 | { | |
52 | uint16_t iocbs; | |
53 | ||
54 | iocbs = 1; | |
55 | if (dsds > 3) { | |
56 | iocbs += (dsds - 3) / 7; | |
57 | if ((dsds - 3) % 7) | |
58 | iocbs++; | |
59 | } | |
60 | return (iocbs); | |
61 | } | |
62 | ||
63 | /** | |
64 | * qla2x00_calc_iocbs_64() - Determine number of Command Type 3 and | |
65 | * Continuation Type 1 IOCBs to allocate. | |
66 | * | |
67 | * @dsds: number of data segment decriptors needed | |
68 | * | |
69 | * Returns the number of IOCB entries needed to store @dsds. | |
70 | */ | |
71 | uint16_t | |
72 | qla2x00_calc_iocbs_64(uint16_t dsds) | |
73 | { | |
74 | uint16_t iocbs; | |
75 | ||
76 | iocbs = 1; | |
77 | if (dsds > 2) { | |
78 | iocbs += (dsds - 2) / 5; | |
79 | if ((dsds - 2) % 5) | |
80 | iocbs++; | |
81 | } | |
82 | return (iocbs); | |
83 | } | |
84 | ||
85 | /** | |
86 | * qla2x00_prep_cont_type0_iocb() - Initialize a Continuation Type 0 IOCB. | |
87 | * @ha: HA context | |
88 | * | |
89 | * Returns a pointer to the Continuation Type 0 IOCB packet. | |
90 | */ | |
91 | static inline cont_entry_t * | |
92 | qla2x00_prep_cont_type0_iocb(scsi_qla_host_t *ha) | |
93 | { | |
94 | cont_entry_t *cont_pkt; | |
95 | ||
96 | /* Adjust ring index. */ | |
97 | ha->req_ring_index++; | |
98 | if (ha->req_ring_index == ha->request_q_length) { | |
99 | ha->req_ring_index = 0; | |
100 | ha->request_ring_ptr = ha->request_ring; | |
101 | } else { | |
102 | ha->request_ring_ptr++; | |
103 | } | |
104 | ||
105 | cont_pkt = (cont_entry_t *)ha->request_ring_ptr; | |
106 | ||
107 | /* Load packet defaults. */ | |
108 | *((uint32_t *)(&cont_pkt->entry_type)) = | |
109 | __constant_cpu_to_le32(CONTINUE_TYPE); | |
110 | ||
111 | return (cont_pkt); | |
112 | } | |
113 | ||
114 | /** | |
115 | * qla2x00_prep_cont_type1_iocb() - Initialize a Continuation Type 1 IOCB. | |
116 | * @ha: HA context | |
117 | * | |
118 | * Returns a pointer to the continuation type 1 IOCB packet. | |
119 | */ | |
120 | static inline cont_a64_entry_t * | |
121 | qla2x00_prep_cont_type1_iocb(scsi_qla_host_t *ha) | |
122 | { | |
123 | cont_a64_entry_t *cont_pkt; | |
124 | ||
125 | /* Adjust ring index. */ | |
126 | ha->req_ring_index++; | |
127 | if (ha->req_ring_index == ha->request_q_length) { | |
128 | ha->req_ring_index = 0; | |
129 | ha->request_ring_ptr = ha->request_ring; | |
130 | } else { | |
131 | ha->request_ring_ptr++; | |
132 | } | |
133 | ||
134 | cont_pkt = (cont_a64_entry_t *)ha->request_ring_ptr; | |
135 | ||
136 | /* Load packet defaults. */ | |
137 | *((uint32_t *)(&cont_pkt->entry_type)) = | |
138 | __constant_cpu_to_le32(CONTINUE_A64_TYPE); | |
139 | ||
140 | return (cont_pkt); | |
141 | } | |
142 | ||
143 | /** | |
144 | * qla2x00_build_scsi_iocbs_32() - Build IOCB command utilizing 32bit | |
145 | * capable IOCB types. | |
146 | * | |
147 | * @sp: SRB command to process | |
148 | * @cmd_pkt: Command type 2 IOCB | |
149 | * @tot_dsds: Total number of segments to transfer | |
150 | */ | |
151 | void qla2x00_build_scsi_iocbs_32(srb_t *sp, cmd_entry_t *cmd_pkt, | |
152 | uint16_t tot_dsds) | |
153 | { | |
154 | uint16_t avail_dsds; | |
155 | uint32_t *cur_dsd; | |
156 | scsi_qla_host_t *ha; | |
157 | struct scsi_cmnd *cmd; | |
385d70b4 FT |
158 | struct scatterlist *sg; |
159 | int i; | |
1da177e4 LT |
160 | |
161 | cmd = sp->cmd; | |
162 | ||
163 | /* Update entry type to indicate Command Type 2 IOCB */ | |
164 | *((uint32_t *)(&cmd_pkt->entry_type)) = | |
165 | __constant_cpu_to_le32(COMMAND_TYPE); | |
166 | ||
167 | /* No data transfer */ | |
385d70b4 | 168 | if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) { |
1da177e4 LT |
169 | cmd_pkt->byte_count = __constant_cpu_to_le32(0); |
170 | return; | |
171 | } | |
172 | ||
173 | ha = sp->ha; | |
174 | ||
175 | cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(cmd)); | |
176 | ||
177 | /* Three DSDs are available in the Command Type 2 IOCB */ | |
178 | avail_dsds = 3; | |
179 | cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address; | |
180 | ||
181 | /* Load data segments */ | |
385d70b4 FT |
182 | scsi_for_each_sg(cmd, sg, tot_dsds, i) { |
183 | cont_entry_t *cont_pkt; | |
184 | ||
185 | /* Allocate additional continuation packets? */ | |
186 | if (avail_dsds == 0) { | |
187 | /* | |
188 | * Seven DSDs are available in the Continuation | |
189 | * Type 0 IOCB. | |
190 | */ | |
191 | cont_pkt = qla2x00_prep_cont_type0_iocb(ha); | |
192 | cur_dsd = (uint32_t *)&cont_pkt->dseg_0_address; | |
193 | avail_dsds = 7; | |
1da177e4 | 194 | } |
385d70b4 FT |
195 | |
196 | *cur_dsd++ = cpu_to_le32(sg_dma_address(sg)); | |
197 | *cur_dsd++ = cpu_to_le32(sg_dma_len(sg)); | |
198 | avail_dsds--; | |
1da177e4 LT |
199 | } |
200 | } | |
201 | ||
202 | /** | |
203 | * qla2x00_build_scsi_iocbs_64() - Build IOCB command utilizing 64bit | |
204 | * capable IOCB types. | |
205 | * | |
206 | * @sp: SRB command to process | |
207 | * @cmd_pkt: Command type 3 IOCB | |
208 | * @tot_dsds: Total number of segments to transfer | |
209 | */ | |
210 | void qla2x00_build_scsi_iocbs_64(srb_t *sp, cmd_entry_t *cmd_pkt, | |
211 | uint16_t tot_dsds) | |
212 | { | |
213 | uint16_t avail_dsds; | |
214 | uint32_t *cur_dsd; | |
215 | scsi_qla_host_t *ha; | |
216 | struct scsi_cmnd *cmd; | |
385d70b4 FT |
217 | struct scatterlist *sg; |
218 | int i; | |
1da177e4 LT |
219 | |
220 | cmd = sp->cmd; | |
221 | ||
222 | /* Update entry type to indicate Command Type 3 IOCB */ | |
223 | *((uint32_t *)(&cmd_pkt->entry_type)) = | |
224 | __constant_cpu_to_le32(COMMAND_A64_TYPE); | |
225 | ||
226 | /* No data transfer */ | |
385d70b4 | 227 | if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) { |
1da177e4 LT |
228 | cmd_pkt->byte_count = __constant_cpu_to_le32(0); |
229 | return; | |
230 | } | |
231 | ||
232 | ha = sp->ha; | |
233 | ||
234 | cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(cmd)); | |
235 | ||
236 | /* Two DSDs are available in the Command Type 3 IOCB */ | |
237 | avail_dsds = 2; | |
238 | cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address; | |
239 | ||
240 | /* Load data segments */ | |
385d70b4 FT |
241 | scsi_for_each_sg(cmd, sg, tot_dsds, i) { |
242 | dma_addr_t sle_dma; | |
243 | cont_a64_entry_t *cont_pkt; | |
244 | ||
245 | /* Allocate additional continuation packets? */ | |
246 | if (avail_dsds == 0) { | |
247 | /* | |
248 | * Five DSDs are available in the Continuation | |
249 | * Type 1 IOCB. | |
250 | */ | |
251 | cont_pkt = qla2x00_prep_cont_type1_iocb(ha); | |
252 | cur_dsd = (uint32_t *)cont_pkt->dseg_0_address; | |
253 | avail_dsds = 5; | |
1da177e4 | 254 | } |
385d70b4 FT |
255 | |
256 | sle_dma = sg_dma_address(sg); | |
257 | *cur_dsd++ = cpu_to_le32(LSD(sle_dma)); | |
258 | *cur_dsd++ = cpu_to_le32(MSD(sle_dma)); | |
259 | *cur_dsd++ = cpu_to_le32(sg_dma_len(sg)); | |
260 | avail_dsds--; | |
1da177e4 LT |
261 | } |
262 | } | |
263 | ||
264 | /** | |
265 | * qla2x00_start_scsi() - Send a SCSI command to the ISP | |
266 | * @sp: command to send to the ISP | |
267 | * | |
268 | * Returns non-zero if a failure occured, else zero. | |
269 | */ | |
270 | int | |
271 | qla2x00_start_scsi(srb_t *sp) | |
272 | { | |
385d70b4 | 273 | int ret, nseg; |
1da177e4 LT |
274 | unsigned long flags; |
275 | scsi_qla_host_t *ha; | |
1da177e4 LT |
276 | struct scsi_cmnd *cmd; |
277 | uint32_t *clr_ptr; | |
278 | uint32_t index; | |
279 | uint32_t handle; | |
280 | cmd_entry_t *cmd_pkt; | |
1da177e4 LT |
281 | uint16_t cnt; |
282 | uint16_t req_cnt; | |
283 | uint16_t tot_dsds; | |
3d71644c | 284 | struct device_reg_2xxx __iomem *reg; |
1da177e4 LT |
285 | |
286 | /* Setup device pointers. */ | |
287 | ret = 0; | |
bdf79621 | 288 | ha = sp->ha; |
3d71644c | 289 | reg = &ha->iobase->isp; |
1da177e4 | 290 | cmd = sp->cmd; |
83021920 | 291 | /* So we know we haven't pci_map'ed anything yet */ |
292 | tot_dsds = 0; | |
1da177e4 LT |
293 | |
294 | /* Send marker if required */ | |
295 | if (ha->marker_needed != 0) { | |
296 | if (qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) != QLA_SUCCESS) { | |
297 | return (QLA_FUNCTION_FAILED); | |
298 | } | |
299 | ha->marker_needed = 0; | |
300 | } | |
301 | ||
302 | /* Acquire ring specific lock */ | |
303 | spin_lock_irqsave(&ha->hardware_lock, flags); | |
304 | ||
305 | /* Check for room in outstanding command list. */ | |
306 | handle = ha->current_outstanding_cmd; | |
307 | for (index = 1; index < MAX_OUTSTANDING_COMMANDS; index++) { | |
308 | handle++; | |
309 | if (handle == MAX_OUTSTANDING_COMMANDS) | |
310 | handle = 1; | |
700ca0e7 | 311 | if (!ha->outstanding_cmds[handle]) |
1da177e4 LT |
312 | break; |
313 | } | |
314 | if (index == MAX_OUTSTANDING_COMMANDS) | |
315 | goto queuing_error; | |
316 | ||
83021920 | 317 | /* Map the sg table so we have an accurate count of sg entries needed */ |
2c3dfe3f SJ |
318 | if (scsi_sg_count(cmd)) { |
319 | nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd), | |
320 | scsi_sg_count(cmd), cmd->sc_data_direction); | |
321 | if (unlikely(!nseg)) | |
322 | goto queuing_error; | |
323 | } else | |
324 | nseg = 0; | |
325 | ||
385d70b4 | 326 | tot_dsds = nseg; |
83021920 | 327 | |
1da177e4 | 328 | /* Calculate the number of request entries needed. */ |
fd34f556 | 329 | req_cnt = ha->isp_ops->calc_req_entries(tot_dsds); |
1da177e4 LT |
330 | if (ha->req_q_cnt < (req_cnt + 2)) { |
331 | cnt = RD_REG_WORD_RELAXED(ISP_REQ_Q_OUT(ha, reg)); | |
332 | if (ha->req_ring_index < cnt) | |
333 | ha->req_q_cnt = cnt - ha->req_ring_index; | |
334 | else | |
335 | ha->req_q_cnt = ha->request_q_length - | |
336 | (ha->req_ring_index - cnt); | |
337 | } | |
338 | if (ha->req_q_cnt < (req_cnt + 2)) | |
339 | goto queuing_error; | |
340 | ||
1da177e4 LT |
341 | /* Build command packet */ |
342 | ha->current_outstanding_cmd = handle; | |
343 | ha->outstanding_cmds[handle] = sp; | |
344 | sp->ha = ha; | |
345 | sp->cmd->host_scribble = (unsigned char *)(unsigned long)handle; | |
346 | ha->req_q_cnt -= req_cnt; | |
347 | ||
348 | cmd_pkt = (cmd_entry_t *)ha->request_ring_ptr; | |
349 | cmd_pkt->handle = handle; | |
350 | /* Zero out remaining portion of packet. */ | |
351 | clr_ptr = (uint32_t *)cmd_pkt + 2; | |
352 | memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8); | |
353 | cmd_pkt->dseg_count = cpu_to_le16(tot_dsds); | |
354 | ||
bdf79621 | 355 | /* Set target ID and LUN number*/ |
356 | SET_TARGET_ID(ha, cmd_pkt->target, sp->fcport->loop_id); | |
357 | cmd_pkt->lun = cpu_to_le16(sp->cmd->device->lun); | |
1da177e4 LT |
358 | |
359 | /* Update tagged queuing modifier */ | |
360 | cmd_pkt->control_flags = __constant_cpu_to_le16(CF_SIMPLE_TAG); | |
1da177e4 | 361 | |
1da177e4 LT |
362 | /* Load SCSI command packet. */ |
363 | memcpy(cmd_pkt->scsi_cdb, cmd->cmnd, cmd->cmd_len); | |
385d70b4 | 364 | cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd)); |
1da177e4 LT |
365 | |
366 | /* Build IOCB segments */ | |
fd34f556 | 367 | ha->isp_ops->build_iocbs(sp, cmd_pkt, tot_dsds); |
1da177e4 LT |
368 | |
369 | /* Set total data segment count. */ | |
370 | cmd_pkt->entry_count = (uint8_t)req_cnt; | |
371 | wmb(); | |
372 | ||
373 | /* Adjust ring index. */ | |
374 | ha->req_ring_index++; | |
375 | if (ha->req_ring_index == ha->request_q_length) { | |
376 | ha->req_ring_index = 0; | |
377 | ha->request_ring_ptr = ha->request_ring; | |
378 | } else | |
379 | ha->request_ring_ptr++; | |
380 | ||
1da177e4 | 381 | sp->flags |= SRB_DMA_VALID; |
1da177e4 LT |
382 | |
383 | /* Set chip new ring index. */ | |
384 | WRT_REG_WORD(ISP_REQ_Q_IN(ha, reg), ha->req_ring_index); | |
385 | RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, reg)); /* PCI Posting. */ | |
386 | ||
4fdfefe5 AV |
387 | /* Manage unprocessed RIO/ZIO commands in response queue. */ |
388 | if (ha->flags.process_response_queue && | |
389 | ha->response_ring_ptr->signature != RESPONSE_PROCESSED) | |
390 | qla2x00_process_response_queue(ha); | |
391 | ||
1da177e4 LT |
392 | spin_unlock_irqrestore(&ha->hardware_lock, flags); |
393 | return (QLA_SUCCESS); | |
394 | ||
395 | queuing_error: | |
385d70b4 FT |
396 | if (tot_dsds) |
397 | scsi_dma_unmap(cmd); | |
398 | ||
1da177e4 LT |
399 | spin_unlock_irqrestore(&ha->hardware_lock, flags); |
400 | ||
401 | return (QLA_FUNCTION_FAILED); | |
402 | } | |
403 | ||
404 | /** | |
405 | * qla2x00_marker() - Send a marker IOCB to the firmware. | |
406 | * @ha: HA context | |
407 | * @loop_id: loop ID | |
408 | * @lun: LUN | |
409 | * @type: marker modifier | |
410 | * | |
411 | * Can be called from both normal and interrupt context. | |
412 | * | |
413 | * Returns non-zero if a failure occured, else zero. | |
414 | */ | |
fa2a1ce5 | 415 | int |
1da177e4 LT |
416 | __qla2x00_marker(scsi_qla_host_t *ha, uint16_t loop_id, uint16_t lun, |
417 | uint8_t type) | |
418 | { | |
2b6c0cee AV |
419 | mrk_entry_t *mrk; |
420 | struct mrk_entry_24xx *mrk24; | |
2c3dfe3f | 421 | scsi_qla_host_t *pha = to_qla_parent(ha); |
1da177e4 | 422 | |
2b6c0cee | 423 | mrk24 = NULL; |
2c3dfe3f | 424 | mrk = (mrk_entry_t *)qla2x00_req_pkt(pha); |
2b6c0cee AV |
425 | if (mrk == NULL) { |
426 | DEBUG2_3(printk("%s(%ld): failed to allocate Marker IOCB.\n", | |
427 | __func__, ha->host_no)); | |
1da177e4 LT |
428 | |
429 | return (QLA_FUNCTION_FAILED); | |
430 | } | |
431 | ||
2b6c0cee AV |
432 | mrk->entry_type = MARKER_TYPE; |
433 | mrk->modifier = type; | |
1da177e4 | 434 | if (type != MK_SYNC_ALL) { |
e428924c | 435 | if (IS_FWI2_CAPABLE(ha)) { |
2b6c0cee AV |
436 | mrk24 = (struct mrk_entry_24xx *) mrk; |
437 | mrk24->nport_handle = cpu_to_le16(loop_id); | |
438 | mrk24->lun[1] = LSB(lun); | |
439 | mrk24->lun[2] = MSB(lun); | |
b797b6de | 440 | host_to_fcp_swap(mrk24->lun, sizeof(mrk24->lun)); |
2c3dfe3f | 441 | mrk24->vp_index = ha->vp_idx; |
2b6c0cee AV |
442 | } else { |
443 | SET_TARGET_ID(ha, mrk->target, loop_id); | |
444 | mrk->lun = cpu_to_le16(lun); | |
445 | } | |
1da177e4 LT |
446 | } |
447 | wmb(); | |
448 | ||
2c3dfe3f | 449 | qla2x00_isp_cmd(pha); |
1da177e4 LT |
450 | |
451 | return (QLA_SUCCESS); | |
452 | } | |
453 | ||
fa2a1ce5 | 454 | int |
1da177e4 LT |
455 | qla2x00_marker(scsi_qla_host_t *ha, uint16_t loop_id, uint16_t lun, |
456 | uint8_t type) | |
457 | { | |
458 | int ret; | |
459 | unsigned long flags = 0; | |
460 | ||
461 | spin_lock_irqsave(&ha->hardware_lock, flags); | |
462 | ret = __qla2x00_marker(ha, loop_id, lun, type); | |
463 | spin_unlock_irqrestore(&ha->hardware_lock, flags); | |
464 | ||
465 | return (ret); | |
466 | } | |
467 | ||
468 | /** | |
469 | * qla2x00_req_pkt() - Retrieve a request packet from the request ring. | |
470 | * @ha: HA context | |
471 | * | |
472 | * Note: The caller must hold the hardware lock before calling this routine. | |
473 | * | |
474 | * Returns NULL if function failed, else, a pointer to the request packet. | |
475 | */ | |
476 | static request_t * | |
477 | qla2x00_req_pkt(scsi_qla_host_t *ha) | |
478 | { | |
2b6c0cee | 479 | device_reg_t __iomem *reg = ha->iobase; |
1da177e4 LT |
480 | request_t *pkt = NULL; |
481 | uint16_t cnt; | |
482 | uint32_t *dword_ptr; | |
483 | uint32_t timer; | |
484 | uint16_t req_cnt = 1; | |
485 | ||
486 | /* Wait 1 second for slot. */ | |
487 | for (timer = HZ; timer; timer--) { | |
488 | if ((req_cnt + 2) >= ha->req_q_cnt) { | |
489 | /* Calculate number of free request entries. */ | |
e428924c | 490 | if (IS_FWI2_CAPABLE(ha)) |
2b6c0cee AV |
491 | cnt = (uint16_t)RD_REG_DWORD( |
492 | ®->isp24.req_q_out); | |
493 | else | |
494 | cnt = qla2x00_debounce_register( | |
495 | ISP_REQ_Q_OUT(ha, ®->isp)); | |
1da177e4 LT |
496 | if (ha->req_ring_index < cnt) |
497 | ha->req_q_cnt = cnt - ha->req_ring_index; | |
498 | else | |
499 | ha->req_q_cnt = ha->request_q_length - | |
500 | (ha->req_ring_index - cnt); | |
501 | } | |
502 | /* If room for request in request ring. */ | |
503 | if ((req_cnt + 2) < ha->req_q_cnt) { | |
504 | ha->req_q_cnt--; | |
505 | pkt = ha->request_ring_ptr; | |
506 | ||
507 | /* Zero out packet. */ | |
508 | dword_ptr = (uint32_t *)pkt; | |
509 | for (cnt = 0; cnt < REQUEST_ENTRY_SIZE / 4; cnt++) | |
510 | *dword_ptr++ = 0; | |
511 | ||
512 | /* Set system defined field. */ | |
513 | pkt->sys_define = (uint8_t)ha->req_ring_index; | |
514 | ||
515 | /* Set entry count. */ | |
516 | pkt->entry_count = 1; | |
517 | ||
518 | break; | |
519 | } | |
520 | ||
521 | /* Release ring specific lock */ | |
522 | spin_unlock(&ha->hardware_lock); | |
523 | ||
524 | udelay(2); /* 2 us */ | |
525 | ||
526 | /* Check for pending interrupts. */ | |
527 | /* During init we issue marker directly */ | |
a3a63d55 | 528 | if (!ha->marker_needed && !ha->flags.init_done) |
1da177e4 LT |
529 | qla2x00_poll(ha); |
530 | ||
531 | spin_lock_irq(&ha->hardware_lock); | |
532 | } | |
533 | if (!pkt) { | |
534 | DEBUG2_3(printk("%s(): **** FAILED ****\n", __func__)); | |
535 | } | |
536 | ||
537 | return (pkt); | |
538 | } | |
539 | ||
540 | /** | |
541 | * qla2x00_isp_cmd() - Modify the request ring pointer. | |
542 | * @ha: HA context | |
543 | * | |
544 | * Note: The caller must hold the hardware lock before calling this routine. | |
545 | */ | |
413975a0 | 546 | static void |
1da177e4 LT |
547 | qla2x00_isp_cmd(scsi_qla_host_t *ha) |
548 | { | |
2b6c0cee | 549 | device_reg_t __iomem *reg = ha->iobase; |
1da177e4 LT |
550 | |
551 | DEBUG5(printk("%s(): IOCB data:\n", __func__)); | |
552 | DEBUG5(qla2x00_dump_buffer( | |
553 | (uint8_t *)ha->request_ring_ptr, REQUEST_ENTRY_SIZE)); | |
554 | ||
555 | /* Adjust ring index. */ | |
556 | ha->req_ring_index++; | |
557 | if (ha->req_ring_index == ha->request_q_length) { | |
558 | ha->req_ring_index = 0; | |
559 | ha->request_ring_ptr = ha->request_ring; | |
560 | } else | |
561 | ha->request_ring_ptr++; | |
562 | ||
563 | /* Set chip new ring index. */ | |
e428924c | 564 | if (IS_FWI2_CAPABLE(ha)) { |
2b6c0cee AV |
565 | WRT_REG_DWORD(®->isp24.req_q_in, ha->req_ring_index); |
566 | RD_REG_DWORD_RELAXED(®->isp24.req_q_in); | |
567 | } else { | |
568 | WRT_REG_WORD(ISP_REQ_Q_IN(ha, ®->isp), ha->req_ring_index); | |
569 | RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, ®->isp)); | |
570 | } | |
571 | ||
572 | } | |
573 | ||
574 | /** | |
575 | * qla24xx_calc_iocbs() - Determine number of Command Type 3 and | |
576 | * Continuation Type 1 IOCBs to allocate. | |
577 | * | |
578 | * @dsds: number of data segment decriptors needed | |
579 | * | |
580 | * Returns the number of IOCB entries needed to store @dsds. | |
581 | */ | |
582 | static inline uint16_t | |
583 | qla24xx_calc_iocbs(uint16_t dsds) | |
584 | { | |
585 | uint16_t iocbs; | |
586 | ||
587 | iocbs = 1; | |
588 | if (dsds > 1) { | |
589 | iocbs += (dsds - 1) / 5; | |
590 | if ((dsds - 1) % 5) | |
591 | iocbs++; | |
592 | } | |
593 | return iocbs; | |
594 | } | |
595 | ||
596 | /** | |
597 | * qla24xx_build_scsi_iocbs() - Build IOCB command utilizing Command Type 7 | |
598 | * IOCB types. | |
599 | * | |
600 | * @sp: SRB command to process | |
601 | * @cmd_pkt: Command type 3 IOCB | |
602 | * @tot_dsds: Total number of segments to transfer | |
603 | */ | |
604 | static inline void | |
605 | qla24xx_build_scsi_iocbs(srb_t *sp, struct cmd_type_7 *cmd_pkt, | |
606 | uint16_t tot_dsds) | |
607 | { | |
608 | uint16_t avail_dsds; | |
609 | uint32_t *cur_dsd; | |
610 | scsi_qla_host_t *ha; | |
611 | struct scsi_cmnd *cmd; | |
385d70b4 FT |
612 | struct scatterlist *sg; |
613 | int i; | |
2b6c0cee AV |
614 | |
615 | cmd = sp->cmd; | |
616 | ||
617 | /* Update entry type to indicate Command Type 3 IOCB */ | |
618 | *((uint32_t *)(&cmd_pkt->entry_type)) = | |
619 | __constant_cpu_to_le32(COMMAND_TYPE_7); | |
620 | ||
621 | /* No data transfer */ | |
385d70b4 | 622 | if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) { |
2b6c0cee AV |
623 | cmd_pkt->byte_count = __constant_cpu_to_le32(0); |
624 | return; | |
625 | } | |
626 | ||
627 | ha = sp->ha; | |
628 | ||
629 | /* Set transfer direction */ | |
630 | if (cmd->sc_data_direction == DMA_TO_DEVICE) | |
631 | cmd_pkt->task_mgmt_flags = | |
632 | __constant_cpu_to_le16(TMF_WRITE_DATA); | |
633 | else if (cmd->sc_data_direction == DMA_FROM_DEVICE) | |
634 | cmd_pkt->task_mgmt_flags = | |
635 | __constant_cpu_to_le16(TMF_READ_DATA); | |
636 | ||
637 | /* One DSD is available in the Command Type 3 IOCB */ | |
638 | avail_dsds = 1; | |
639 | cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address; | |
640 | ||
641 | /* Load data segments */ | |
385d70b4 FT |
642 | |
643 | scsi_for_each_sg(cmd, sg, tot_dsds, i) { | |
644 | dma_addr_t sle_dma; | |
645 | cont_a64_entry_t *cont_pkt; | |
646 | ||
647 | /* Allocate additional continuation packets? */ | |
648 | if (avail_dsds == 0) { | |
649 | /* | |
650 | * Five DSDs are available in the Continuation | |
651 | * Type 1 IOCB. | |
652 | */ | |
653 | cont_pkt = qla2x00_prep_cont_type1_iocb(ha); | |
654 | cur_dsd = (uint32_t *)cont_pkt->dseg_0_address; | |
655 | avail_dsds = 5; | |
2b6c0cee | 656 | } |
385d70b4 FT |
657 | |
658 | sle_dma = sg_dma_address(sg); | |
659 | *cur_dsd++ = cpu_to_le32(LSD(sle_dma)); | |
660 | *cur_dsd++ = cpu_to_le32(MSD(sle_dma)); | |
661 | *cur_dsd++ = cpu_to_le32(sg_dma_len(sg)); | |
662 | avail_dsds--; | |
2b6c0cee AV |
663 | } |
664 | } | |
665 | ||
666 | ||
667 | /** | |
668 | * qla24xx_start_scsi() - Send a SCSI command to the ISP | |
669 | * @sp: command to send to the ISP | |
670 | * | |
671 | * Returns non-zero if a failure occured, else zero. | |
672 | */ | |
673 | int | |
674 | qla24xx_start_scsi(srb_t *sp) | |
675 | { | |
385d70b4 | 676 | int ret, nseg; |
2b6c0cee AV |
677 | unsigned long flags; |
678 | scsi_qla_host_t *ha; | |
679 | struct scsi_cmnd *cmd; | |
680 | uint32_t *clr_ptr; | |
681 | uint32_t index; | |
682 | uint32_t handle; | |
683 | struct cmd_type_7 *cmd_pkt; | |
2b6c0cee AV |
684 | uint16_t cnt; |
685 | uint16_t req_cnt; | |
686 | uint16_t tot_dsds; | |
db776a14 | 687 | struct device_reg_24xx __iomem *reg; |
2b6c0cee AV |
688 | |
689 | /* Setup device pointers. */ | |
690 | ret = 0; | |
691 | ha = sp->ha; | |
692 | reg = &ha->iobase->isp24; | |
693 | cmd = sp->cmd; | |
694 | /* So we know we haven't pci_map'ed anything yet */ | |
695 | tot_dsds = 0; | |
696 | ||
697 | /* Send marker if required */ | |
698 | if (ha->marker_needed != 0) { | |
699 | if (qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) != QLA_SUCCESS) { | |
700 | return QLA_FUNCTION_FAILED; | |
701 | } | |
702 | ha->marker_needed = 0; | |
703 | } | |
704 | ||
705 | /* Acquire ring specific lock */ | |
706 | spin_lock_irqsave(&ha->hardware_lock, flags); | |
707 | ||
708 | /* Check for room in outstanding command list. */ | |
709 | handle = ha->current_outstanding_cmd; | |
710 | for (index = 1; index < MAX_OUTSTANDING_COMMANDS; index++) { | |
711 | handle++; | |
712 | if (handle == MAX_OUTSTANDING_COMMANDS) | |
713 | handle = 1; | |
700ca0e7 | 714 | if (!ha->outstanding_cmds[handle]) |
2b6c0cee AV |
715 | break; |
716 | } | |
717 | if (index == MAX_OUTSTANDING_COMMANDS) | |
718 | goto queuing_error; | |
719 | ||
720 | /* Map the sg table so we have an accurate count of sg entries needed */ | |
2c3dfe3f SJ |
721 | if (scsi_sg_count(cmd)) { |
722 | nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd), | |
723 | scsi_sg_count(cmd), cmd->sc_data_direction); | |
724 | if (unlikely(!nseg)) | |
2b6c0cee | 725 | goto queuing_error; |
2c3dfe3f SJ |
726 | } else |
727 | nseg = 0; | |
728 | ||
385d70b4 | 729 | tot_dsds = nseg; |
2b6c0cee AV |
730 | |
731 | req_cnt = qla24xx_calc_iocbs(tot_dsds); | |
732 | if (ha->req_q_cnt < (req_cnt + 2)) { | |
733 | cnt = (uint16_t)RD_REG_DWORD_RELAXED(®->req_q_out); | |
734 | if (ha->req_ring_index < cnt) | |
735 | ha->req_q_cnt = cnt - ha->req_ring_index; | |
736 | else | |
737 | ha->req_q_cnt = ha->request_q_length - | |
738 | (ha->req_ring_index - cnt); | |
739 | } | |
131736d3 | 740 | if (ha->req_q_cnt < (req_cnt + 2)) |
2b6c0cee | 741 | goto queuing_error; |
2b6c0cee AV |
742 | |
743 | /* Build command packet. */ | |
744 | ha->current_outstanding_cmd = handle; | |
745 | ha->outstanding_cmds[handle] = sp; | |
746 | sp->ha = ha; | |
747 | sp->cmd->host_scribble = (unsigned char *)(unsigned long)handle; | |
748 | ha->req_q_cnt -= req_cnt; | |
749 | ||
750 | cmd_pkt = (struct cmd_type_7 *)ha->request_ring_ptr; | |
751 | cmd_pkt->handle = handle; | |
752 | ||
753 | /* Zero out remaining portion of packet. */ | |
72df8325 | 754 | /* tagged queuing modifier -- default is TSK_SIMPLE (0). */ |
2b6c0cee AV |
755 | clr_ptr = (uint32_t *)cmd_pkt + 2; |
756 | memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8); | |
757 | cmd_pkt->dseg_count = cpu_to_le16(tot_dsds); | |
758 | ||
759 | /* Set NPORT-ID and LUN number*/ | |
760 | cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id); | |
761 | cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa; | |
762 | cmd_pkt->port_id[1] = sp->fcport->d_id.b.area; | |
763 | cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain; | |
2c3dfe3f | 764 | cmd_pkt->vp_index = sp->fcport->vp_idx; |
2b6c0cee | 765 | |
661c3f6c | 766 | int_to_scsilun(sp->cmd->device->lun, &cmd_pkt->lun); |
0d4be124 | 767 | host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun)); |
2b6c0cee | 768 | |
2b6c0cee AV |
769 | /* Load SCSI command packet. */ |
770 | memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len); | |
771 | host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb)); | |
772 | ||
385d70b4 | 773 | cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd)); |
2b6c0cee AV |
774 | |
775 | /* Build IOCB segments */ | |
776 | qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds); | |
777 | ||
778 | /* Set total data segment count. */ | |
779 | cmd_pkt->entry_count = (uint8_t)req_cnt; | |
780 | wmb(); | |
781 | ||
782 | /* Adjust ring index. */ | |
783 | ha->req_ring_index++; | |
784 | if (ha->req_ring_index == ha->request_q_length) { | |
785 | ha->req_ring_index = 0; | |
786 | ha->request_ring_ptr = ha->request_ring; | |
787 | } else | |
788 | ha->request_ring_ptr++; | |
789 | ||
790 | sp->flags |= SRB_DMA_VALID; | |
2b6c0cee AV |
791 | |
792 | /* Set chip new ring index. */ | |
793 | WRT_REG_DWORD(®->req_q_in, ha->req_ring_index); | |
794 | RD_REG_DWORD_RELAXED(®->req_q_in); /* PCI Posting. */ | |
795 | ||
4fdfefe5 AV |
796 | /* Manage unprocessed RIO/ZIO commands in response queue. */ |
797 | if (ha->flags.process_response_queue && | |
798 | ha->response_ring_ptr->signature != RESPONSE_PROCESSED) | |
799 | qla24xx_process_response_queue(ha); | |
800 | ||
2b6c0cee AV |
801 | spin_unlock_irqrestore(&ha->hardware_lock, flags); |
802 | return QLA_SUCCESS; | |
803 | ||
804 | queuing_error: | |
385d70b4 FT |
805 | if (tot_dsds) |
806 | scsi_dma_unmap(cmd); | |
807 | ||
2b6c0cee AV |
808 | spin_unlock_irqrestore(&ha->hardware_lock, flags); |
809 | ||
810 | return QLA_FUNCTION_FAILED; | |
1da177e4 | 811 | } |