1 // SPDX-License-Identifier: GPL-2.0-only
3 * QLogic iSCSI HBA Driver
4 * Copyright (c) 2003-2013 QLogic Corporation
10 #include "ql4_inline.h"
12 #include <scsi/scsi_tcq.h>
15 qla4xxx_space_in_req_ring(struct scsi_qla_host *ha, uint16_t req_cnt)
19 /* Calculate number of free request entries. */
20 if ((req_cnt + 2) >= ha->req_q_count) {
21 cnt = (uint16_t) ha->isp_ops->rd_shdw_req_q_out(ha);
22 if (ha->request_in < cnt)
23 ha->req_q_count = cnt - ha->request_in;
25 ha->req_q_count = REQUEST_QUEUE_DEPTH -
26 (ha->request_in - cnt);
29 /* Check if room for request in request ring. */
30 if ((req_cnt + 2) < ha->req_q_count)
36 static void qla4xxx_advance_req_ring_ptr(struct scsi_qla_host *ha)
38 /* Advance request queue pointer */
39 if (ha->request_in == (REQUEST_QUEUE_DEPTH - 1)) {
41 ha->request_ptr = ha->request_ring;
49 * qla4xxx_get_req_pkt - returns a valid entry in request queue.
50 * @ha: Pointer to host adapter structure.
51 * @queue_entry: Pointer to pointer to queue entry structure
53 * This routine performs the following tasks:
54 * - returns the current request_in pointer (if queue not full)
55 * - advances the request_in pointer
56 * - checks for queue full
58 static int qla4xxx_get_req_pkt(struct scsi_qla_host *ha,
59 struct queue_entry **queue_entry)
63 if (qla4xxx_space_in_req_ring(ha, req_cnt)) {
64 *queue_entry = ha->request_ptr;
65 memset(*queue_entry, 0, sizeof(**queue_entry));
67 qla4xxx_advance_req_ring_ptr(ha);
68 ha->req_q_count -= req_cnt;
76 * qla4xxx_send_marker_iocb - issues marker iocb to HBA
77 * @ha: Pointer to host adapter structure.
78 * @ddb_entry: Pointer to device database entry
80 * @mrkr_mod: marker identifier
82 * This routine issues a marker IOCB.
84 int qla4xxx_send_marker_iocb(struct scsi_qla_host *ha,
85 struct ddb_entry *ddb_entry, uint64_t lun, uint16_t mrkr_mod)
87 struct qla4_marker_entry *marker_entry;
88 unsigned long flags = 0;
89 uint8_t status = QLA_SUCCESS;
91 /* Acquire hardware specific lock */
92 spin_lock_irqsave(&ha->hardware_lock, flags);
94 /* Get pointer to the queue entry for the marker */
95 if (qla4xxx_get_req_pkt(ha, (struct queue_entry **) &marker_entry) !=
98 goto exit_send_marker;
101 /* Put the marker in the request queue */
102 marker_entry->hdr.entryType = ET_MARKER;
103 marker_entry->hdr.entryCount = 1;
104 marker_entry->target = cpu_to_le16(ddb_entry->fw_ddb_index);
105 marker_entry->modifier = cpu_to_le16(mrkr_mod);
106 int_to_scsilun(lun, &marker_entry->lun);
109 /* Tell ISP it's got a new I/O request */
110 ha->isp_ops->queue_iocb(ha);
113 spin_unlock_irqrestore(&ha->hardware_lock, flags);
117 static struct continuation_t1_entry *
118 qla4xxx_alloc_cont_entry(struct scsi_qla_host *ha)
120 struct continuation_t1_entry *cont_entry;
122 cont_entry = (struct continuation_t1_entry *)ha->request_ptr;
124 qla4xxx_advance_req_ring_ptr(ha);
126 /* Load packet defaults */
127 cont_entry->hdr.entryType = ET_CONTINUE;
128 cont_entry->hdr.entryCount = 1;
129 cont_entry->hdr.systemDefined = (uint8_t) cpu_to_le16(ha->request_in);
134 static uint16_t qla4xxx_calc_request_entries(uint16_t dsds)
139 if (dsds > COMMAND_SEG) {
140 iocbs += (dsds - COMMAND_SEG) / CONTINUE_SEG;
141 if ((dsds - COMMAND_SEG) % CONTINUE_SEG)
147 static void qla4xxx_build_scsi_iocbs(struct srb *srb,
148 struct command_t3_entry *cmd_entry,
151 struct scsi_qla_host *ha;
153 struct data_seg_a64 *cur_dsd;
154 struct scsi_cmnd *cmd;
155 struct scatterlist *sg;
161 if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
162 /* No data being transferred */
163 cmd_entry->ttlByteCnt = cpu_to_le32(0);
167 avail_dsds = COMMAND_SEG;
168 cur_dsd = (struct data_seg_a64 *) & (cmd_entry->dataseg[0]);
170 scsi_for_each_sg(cmd, sg, tot_dsds, i) {
173 /* Allocate additional continuation packets? */
174 if (avail_dsds == 0) {
175 struct continuation_t1_entry *cont_entry;
177 cont_entry = qla4xxx_alloc_cont_entry(ha);
179 (struct data_seg_a64 *)
180 &cont_entry->dataseg[0];
181 avail_dsds = CONTINUE_SEG;
184 sle_dma = sg_dma_address(sg);
185 cur_dsd->base.addrLow = cpu_to_le32(LSDW(sle_dma));
186 cur_dsd->base.addrHigh = cpu_to_le32(MSDW(sle_dma));
187 cur_dsd->count = cpu_to_le32(sg_dma_len(sg));
194 void qla4_83xx_queue_iocb(struct scsi_qla_host *ha)
196 writel(ha->request_in, &ha->qla4_83xx_reg->req_q_in);
197 readl(&ha->qla4_83xx_reg->req_q_in);
200 void qla4_83xx_complete_iocb(struct scsi_qla_host *ha)
202 writel(ha->response_out, &ha->qla4_83xx_reg->rsp_q_out);
203 readl(&ha->qla4_83xx_reg->rsp_q_out);
207 * qla4_82xx_queue_iocb - Tell ISP it's got new request(s)
208 * @ha: pointer to host adapter structure.
210 * This routine notifies the ISP that one or more new request
211 * queue entries have been placed on the request queue.
213 void qla4_82xx_queue_iocb(struct scsi_qla_host *ha)
217 dbval = 0x14 | (ha->func_num << 5);
218 dbval = dbval | (0 << 8) | (ha->request_in << 16);
220 qla4_82xx_wr_32(ha, ha->nx_db_wr_ptr, ha->request_in);
224 * qla4_82xx_complete_iocb - Tell ISP we're done with response(s)
225 * @ha: pointer to host adapter structure.
227 * This routine notifies the ISP that one or more response/completion
228 * queue entries have been processed by the driver.
229 * This also clears the interrupt.
231 void qla4_82xx_complete_iocb(struct scsi_qla_host *ha)
233 writel(ha->response_out, &ha->qla4_82xx_reg->rsp_q_out);
234 readl(&ha->qla4_82xx_reg->rsp_q_out);
238 * qla4xxx_queue_iocb - Tell ISP it's got new request(s)
239 * @ha: pointer to host adapter structure.
241 * This routine is notifies the ISP that one or more new request
242 * queue entries have been placed on the request queue.
244 void qla4xxx_queue_iocb(struct scsi_qla_host *ha)
246 writel(ha->request_in, &ha->reg->req_q_in);
247 readl(&ha->reg->req_q_in);
251 * qla4xxx_complete_iocb - Tell ISP we're done with response(s)
252 * @ha: pointer to host adapter structure.
254 * This routine is notifies the ISP that one or more response/completion
255 * queue entries have been processed by the driver.
256 * This also clears the interrupt.
258 void qla4xxx_complete_iocb(struct scsi_qla_host *ha)
260 writel(ha->response_out, &ha->reg->rsp_q_out);
261 readl(&ha->reg->rsp_q_out);
265 * qla4xxx_send_command_to_isp - issues command to HBA
266 * @ha: pointer to host adapter structure.
267 * @srb: pointer to SCSI Request Block to be sent to ISP
269 * This routine is called by qla4xxx_queuecommand to build an ISP
270 * command and pass it to the ISP for execution.
272 int qla4xxx_send_command_to_isp(struct scsi_qla_host *ha, struct srb * srb)
274 struct scsi_cmnd *cmd = srb->cmd;
275 struct ddb_entry *ddb_entry;
276 struct command_t3_entry *cmd_entry;
283 /* Get real lun and adapter */
284 ddb_entry = srb->ddb;
288 /* Acquire hardware specific lock */
289 spin_lock_irqsave(&ha->hardware_lock, flags);
291 index = scsi_cmd_to_rq(cmd)->tag;
294 * Check to see if adapter is online before placing request on
295 * request queue. If a reset occurs and a request is in the queue,
296 * the firmware will still attempt to process the request, retrieving
297 * garbage for pointers.
299 if (!test_bit(AF_ONLINE, &ha->flags)) {
300 DEBUG2(printk("scsi%ld: %s: Adapter OFFLINE! "
301 "Do not issue command.\n",
302 ha->host_no, __func__));
306 /* Calculate the number of request entries needed. */
307 nseg = scsi_dma_map(cmd);
312 req_cnt = qla4xxx_calc_request_entries(tot_dsds);
313 if (!qla4xxx_space_in_req_ring(ha, req_cnt))
316 /* total iocbs active */
317 if ((ha->iocb_cnt + req_cnt) >= ha->iocb_hiwat)
320 /* Build command packet */
321 cmd_entry = (struct command_t3_entry *) ha->request_ptr;
322 memset(cmd_entry, 0, sizeof(struct command_t3_entry));
323 cmd_entry->hdr.entryType = ET_COMMAND;
324 cmd_entry->handle = cpu_to_le32(index);
325 cmd_entry->target = cpu_to_le16(ddb_entry->fw_ddb_index);
327 int_to_scsilun(cmd->device->lun, &cmd_entry->lun);
328 cmd_entry->ttlByteCnt = cpu_to_le32(scsi_bufflen(cmd));
329 memcpy(cmd_entry->cdb, cmd->cmnd, cmd->cmd_len);
330 cmd_entry->dataSegCnt = cpu_to_le16(tot_dsds);
331 cmd_entry->hdr.entryCount = req_cnt;
333 /* Set data transfer direction control flags
334 * NOTE: Look at data_direction bits iff there is data to be
335 * transferred, as the data direction bit is sometimed filled
336 * in when there is no data to be transferred */
337 cmd_entry->control_flags = CF_NO_DATA;
338 if (scsi_bufflen(cmd)) {
339 if (cmd->sc_data_direction == DMA_TO_DEVICE)
340 cmd_entry->control_flags = CF_WRITE;
341 else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
342 cmd_entry->control_flags = CF_READ;
344 ha->bytes_xfered += scsi_bufflen(cmd);
345 if (ha->bytes_xfered & ~0xFFFFF){
346 ha->total_mbytes_xferred += ha->bytes_xfered >> 20;
347 ha->bytes_xfered &= 0xFFFFF;
351 /* Set tagged queueing control flags */
352 cmd_entry->control_flags |= CF_SIMPLE_TAG;
354 qla4xxx_advance_req_ring_ptr(ha);
355 qla4xxx_build_scsi_iocbs(srb, cmd_entry, tot_dsds);
358 srb->cmd->host_scribble = (unsigned char *)(unsigned long)index;
360 /* update counters */
361 srb->state = SRB_ACTIVE_STATE;
362 srb->flags |= SRB_DMA_VALID;
364 /* Track IOCB used */
365 ha->iocb_cnt += req_cnt;
366 srb->iocb_cnt = req_cnt;
367 ha->req_q_count -= req_cnt;
369 ha->isp_ops->queue_iocb(ha);
370 spin_unlock_irqrestore(&ha->hardware_lock, flags);
378 spin_unlock_irqrestore(&ha->hardware_lock, flags);
383 int qla4xxx_send_passthru0(struct iscsi_task *task)
385 struct passthru0 *passthru_iocb;
386 struct iscsi_session *sess = task->conn->session;
387 struct ddb_entry *ddb_entry = sess->dd_data;
388 struct scsi_qla_host *ha = ddb_entry->ha;
389 struct ql4_task_data *task_data = task->dd_data;
390 uint16_t ctrl_flags = 0;
394 spin_lock_irqsave(&ha->hardware_lock, flags);
395 task_data->iocb_req_cnt = 1;
396 /* Put the IOCB on the request queue */
397 if (!qla4xxx_space_in_req_ring(ha, task_data->iocb_req_cnt))
400 passthru_iocb = (struct passthru0 *) ha->request_ptr;
402 memset(passthru_iocb, 0, sizeof(struct passthru0));
403 passthru_iocb->hdr.entryType = ET_PASSTHRU0;
404 passthru_iocb->hdr.systemDefined = SD_ISCSI_PDU;
405 passthru_iocb->hdr.entryCount = task_data->iocb_req_cnt;
406 passthru_iocb->handle = task->itt;
407 passthru_iocb->target = cpu_to_le16(ddb_entry->fw_ddb_index);
408 passthru_iocb->timeout = cpu_to_le16(PT_DEFAULT_TIMEOUT);
410 /* Setup the out & in DSDs */
411 if (task_data->req_len) {
412 memcpy((uint8_t *)task_data->req_buffer +
413 sizeof(struct iscsi_hdr), task->data, task->data_count);
414 ctrl_flags |= PT_FLAG_SEND_BUFFER;
415 passthru_iocb->out_dsd.base.addrLow =
416 cpu_to_le32(LSDW(task_data->req_dma));
417 passthru_iocb->out_dsd.base.addrHigh =
418 cpu_to_le32(MSDW(task_data->req_dma));
419 passthru_iocb->out_dsd.count =
420 cpu_to_le32(task->data_count +
421 sizeof(struct iscsi_hdr));
423 if (task_data->resp_len) {
424 passthru_iocb->in_dsd.base.addrLow =
425 cpu_to_le32(LSDW(task_data->resp_dma));
426 passthru_iocb->in_dsd.base.addrHigh =
427 cpu_to_le32(MSDW(task_data->resp_dma));
428 passthru_iocb->in_dsd.count =
429 cpu_to_le32(task_data->resp_len);
432 ctrl_flags |= (PT_FLAG_ISCSI_PDU | PT_FLAG_WAIT_4_RESPONSE);
433 passthru_iocb->control_flags = cpu_to_le16(ctrl_flags);
435 /* Update the request pointer */
436 qla4xxx_advance_req_ring_ptr(ha);
439 /* Track IOCB used */
440 ha->iocb_cnt += task_data->iocb_req_cnt;
441 ha->req_q_count -= task_data->iocb_req_cnt;
442 ha->isp_ops->queue_iocb(ha);
446 spin_unlock_irqrestore(&ha->hardware_lock, flags);
450 static struct mrb *qla4xxx_get_new_mrb(struct scsi_qla_host *ha)
454 mrb = kzalloc(sizeof(*mrb), GFP_KERNEL);
462 static int qla4xxx_send_mbox_iocb(struct scsi_qla_host *ha, struct mrb *mrb,
465 int rval = QLA_SUCCESS;
470 /* Acquire hardware specific lock */
471 spin_lock_irqsave(&ha->hardware_lock, flags);
473 /* Get pointer to the queue entry for the marker */
474 rval = qla4xxx_get_req_pkt(ha, (struct queue_entry **) &(mrb->mbox));
475 if (rval != QLA_SUCCESS)
478 index = ha->mrb_index;
479 /* get valid mrb index*/
480 for (i = 0; i < MAX_MRB; i++) {
482 if (index == MAX_MRB)
484 if (ha->active_mrb_array[index] == NULL) {
485 ha->mrb_index = index;
491 ha->active_mrb_array[index] = mrb;
492 mrb->mbox->handle = index;
493 mrb->mbox->hdr.entryType = ET_MBOX_CMD;
494 mrb->mbox->hdr.entryCount = mrb->iocb_cnt;
495 memcpy(mrb->mbox->in_mbox, in_mbox, 32);
496 mrb->mbox_cmd = in_mbox[0];
499 ha->iocb_cnt += mrb->iocb_cnt;
500 ha->isp_ops->queue_iocb(ha);
502 spin_unlock_irqrestore(&ha->hardware_lock, flags);
506 int qla4xxx_ping_iocb(struct scsi_qla_host *ha, uint32_t options,
507 uint32_t payload_size, uint32_t pid, uint8_t *ipaddr)
510 struct mrb *mrb = NULL;
511 int rval = QLA_SUCCESS;
513 memset(in_mbox, 0, sizeof(in_mbox));
515 mrb = qla4xxx_get_new_mrb(ha);
517 DEBUG2(ql4_printk(KERN_WARNING, ha, "%s: fail to get new mrb\n",
523 in_mbox[0] = MBOX_CMD_PING;
524 in_mbox[1] = options;
525 memcpy(&in_mbox[2], &ipaddr[0], 4);
526 memcpy(&in_mbox[3], &ipaddr[4], 4);
527 memcpy(&in_mbox[4], &ipaddr[8], 4);
528 memcpy(&in_mbox[5], &ipaddr[12], 4);
529 in_mbox[6] = payload_size;
532 rval = qla4xxx_send_mbox_iocb(ha, mrb, in_mbox);
534 if (rval != QLA_SUCCESS)