2 * PMC-Sierra PM8001/8081/8088/8089 SAS/SATA based host adapters driver
4 * Copyright (c) 2008-2009 USI Co., Ltd.
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8 * modification, are permitted provided that the following conditions
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16 * including a substantially similar Disclaimer requirement for further
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19 * of any contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
22 * Alternatively, this software may be distributed under the terms of the
23 * GNU General Public License ("GPL") version 2 as published by the Free
24 * Software Foundation.
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41 #include <linux/slab.h>
42 #include "pm8001_sas.h"
43 #include "pm80xx_tracepoints.h"
46 * pm8001_find_tag - from sas task to find out tag that belongs to this task
47 * @task: the task sent to the LLDD
48 * @tag: the found tag associated with the task
50 static int pm8001_find_tag(struct sas_task *task, u32 *tag)
52 if (task->lldd_task) {
53 struct pm8001_ccb_info *ccb;
54 ccb = task->lldd_task;
62 * pm8001_tag_free - free the no more needed tag
63 * @pm8001_ha: our hba struct
64 * @tag: the found tag associated with the task
66 void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag)
68 void *bitmap = pm8001_ha->tags;
69 clear_bit(tag, bitmap);
73 * pm8001_tag_alloc - allocate a empty tag for task used.
74 * @pm8001_ha: our hba struct
75 * @tag_out: the found empty tag .
77 inline int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out)
80 void *bitmap = pm8001_ha->tags;
83 spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags);
84 tag = find_first_zero_bit(bitmap, pm8001_ha->tags_num);
85 if (tag >= pm8001_ha->tags_num) {
86 spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
87 return -SAS_QUEUE_FULL;
90 spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
95 void pm8001_tag_init(struct pm8001_hba_info *pm8001_ha)
98 for (i = 0; i < pm8001_ha->tags_num; ++i)
99 pm8001_tag_free(pm8001_ha, i);
103 * pm8001_mem_alloc - allocate memory for pm8001.
105 * @virt_addr: the allocated virtual address
106 * @pphys_addr: DMA address for this device
107 * @pphys_addr_hi: the physical address high byte address.
108 * @pphys_addr_lo: the physical address low byte address.
109 * @mem_size: memory size.
110 * @align: requested byte alignment
112 int pm8001_mem_alloc(struct pci_dev *pdev, void **virt_addr,
113 dma_addr_t *pphys_addr, u32 *pphys_addr_hi,
114 u32 *pphys_addr_lo, u32 mem_size, u32 align)
116 caddr_t mem_virt_alloc;
117 dma_addr_t mem_dma_handle;
119 u64 align_offset = 0;
121 align_offset = (dma_addr_t)align - 1;
122 mem_virt_alloc = dma_alloc_coherent(&pdev->dev, mem_size + align,
123 &mem_dma_handle, GFP_KERNEL);
126 *pphys_addr = mem_dma_handle;
127 phys_align = (*pphys_addr + align_offset) & ~align_offset;
128 *virt_addr = (void *)mem_virt_alloc + phys_align - *pphys_addr;
129 *pphys_addr_hi = upper_32_bits(phys_align);
130 *pphys_addr_lo = lower_32_bits(phys_align);
135 * pm8001_find_ha_by_dev - from domain device which come from sas layer to
136 * find out our hba struct.
137 * @dev: the domain device which from sas layer.
140 struct pm8001_hba_info *pm8001_find_ha_by_dev(struct domain_device *dev)
142 struct sas_ha_struct *sha = dev->port->ha;
143 struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
148 * pm8001_phy_control - this function should be registered to
149 * sas_domain_function_template to provide libsas used, note: this is just
150 * control the HBA phy rather than other expander phy if you want control
151 * other phy, you should use SMP command.
152 * @sas_phy: which phy in HBA phys.
153 * @func: the operation.
154 * @funcdata: always NULL.
156 int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
159 int rc = 0, phy_id = sas_phy->id;
160 struct pm8001_hba_info *pm8001_ha = NULL;
161 struct sas_phy_linkrates *rates;
162 struct pm8001_phy *phy;
163 DECLARE_COMPLETION_ONSTACK(completion);
165 pm8001_ha = sas_phy->ha->lldd_ha;
166 phy = &pm8001_ha->phy[phy_id];
167 pm8001_ha->phy[phy_id].enable_completion = &completion;
169 case PHY_FUNC_SET_LINK_RATE:
171 if (rates->minimum_linkrate) {
172 pm8001_ha->phy[phy_id].minimum_linkrate =
173 rates->minimum_linkrate;
175 if (rates->maximum_linkrate) {
176 pm8001_ha->phy[phy_id].maximum_linkrate =
177 rates->maximum_linkrate;
179 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
180 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
181 wait_for_completion(&completion);
183 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
186 case PHY_FUNC_HARD_RESET:
187 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
188 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
189 wait_for_completion(&completion);
191 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
194 case PHY_FUNC_LINK_RESET:
195 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
196 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
197 wait_for_completion(&completion);
199 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
202 case PHY_FUNC_RELEASE_SPINUP_HOLD:
203 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
206 case PHY_FUNC_DISABLE:
207 if (pm8001_ha->chip_id != chip_8001) {
208 if (pm8001_ha->phy[phy_id].phy_state ==
209 PHY_STATE_LINK_UP_SPCV) {
210 sas_phy_disconnected(&phy->sas_phy);
211 sas_notify_phy_event(&phy->sas_phy,
212 PHYE_LOSS_OF_SIGNAL, GFP_KERNEL);
213 phy->phy_attached = 0;
216 if (pm8001_ha->phy[phy_id].phy_state ==
217 PHY_STATE_LINK_UP_SPC) {
218 sas_phy_disconnected(&phy->sas_phy);
219 sas_notify_phy_event(&phy->sas_phy,
220 PHYE_LOSS_OF_SIGNAL, GFP_KERNEL);
221 phy->phy_attached = 0;
224 PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id);
226 case PHY_FUNC_GET_EVENTS:
227 spin_lock_irqsave(&pm8001_ha->lock, flags);
228 if (pm8001_ha->chip_id == chip_8001) {
229 if (-1 == pm8001_bar4_shift(pm8001_ha,
230 (phy_id < 4) ? 0x30000 : 0x40000)) {
231 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
236 struct sas_phy *phy = sas_phy->phy;
237 uint32_t *qp = (uint32_t *)(((char *)
238 pm8001_ha->io_mem[2].memvirtaddr)
239 + 0x1034 + (0x4000 * (phy_id & 3)));
241 phy->invalid_dword_count = qp[0];
242 phy->running_disparity_error_count = qp[1];
243 phy->loss_of_dword_sync_count = qp[3];
244 phy->phy_reset_problem_count = qp[4];
246 if (pm8001_ha->chip_id == chip_8001)
247 pm8001_bar4_shift(pm8001_ha, 0);
248 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
251 pm8001_dbg(pm8001_ha, DEVIO, "func 0x%x\n", func);
259 * pm8001_scan_start - we should enable all HBA phys by sending the phy_start
261 * @shost: the scsi host data.
263 void pm8001_scan_start(struct Scsi_Host *shost)
266 struct pm8001_hba_info *pm8001_ha;
267 struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
268 DECLARE_COMPLETION_ONSTACK(completion);
269 pm8001_ha = sha->lldd_ha;
270 /* SAS_RE_INITIALIZATION not available in SPCv/ve */
271 if (pm8001_ha->chip_id == chip_8001)
272 PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha);
273 for (i = 0; i < pm8001_ha->chip->n_phy; ++i) {
274 pm8001_ha->phy[i].enable_completion = &completion;
275 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
276 wait_for_completion(&completion);
281 int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time)
283 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
285 /* give the phy enabling interrupt event time to come in (1s
286 * is empirically about all it takes) */
289 /* Wait for discovery to finish */
295 * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task
296 * @pm8001_ha: our hba card information
297 * @ccb: the ccb which attached to smp task
299 static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha,
300 struct pm8001_ccb_info *ccb)
302 return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb);
305 u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag)
307 struct ata_queued_cmd *qc = task->uldd_task;
309 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
310 qc->tf.command == ATA_CMD_FPDMA_READ ||
311 qc->tf.command == ATA_CMD_FPDMA_RECV ||
312 qc->tf.command == ATA_CMD_FPDMA_SEND ||
313 qc->tf.command == ATA_CMD_NCQ_NON_DATA) {
322 * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task
323 * @pm8001_ha: our hba card information
324 * @ccb: the ccb which attached to sata task
326 static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,
327 struct pm8001_ccb_info *ccb)
329 return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);
333 * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data
334 * @pm8001_ha: our hba card information
335 * @ccb: the ccb which attached to TM
336 * @tmf: the task management IU
338 static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,
339 struct pm8001_ccb_info *ccb, struct pm8001_tmf_task *tmf)
341 return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);
345 * pm8001_task_prep_ssp - the dispatcher function, prepare ssp data for ssp task
346 * @pm8001_ha: our hba card information
347 * @ccb: the ccb which attached to ssp task
349 static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,
350 struct pm8001_ccb_info *ccb)
352 return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);
355 /* Find the local port id that's attached to this device */
356 static int sas_find_local_port_id(struct domain_device *dev)
358 struct domain_device *pdev = dev->parent;
360 /* Directly attached device */
362 return dev->port->id;
364 struct domain_device *pdev_p = pdev->parent;
366 return pdev->port->id;
372 #define DEV_IS_GONE(pm8001_dev) \
373 ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)))
375 * pm8001_task_exec - queue the task(ssp, smp && ata) to the hardware.
376 * @task: the task to be execute.
377 * @gfp_flags: gfp_flags.
378 * @is_tmf: if it is task management task.
379 * @tmf: the task management IU
381 static int pm8001_task_exec(struct sas_task *task,
382 gfp_t gfp_flags, int is_tmf, struct pm8001_tmf_task *tmf)
384 struct domain_device *dev = task->dev;
385 struct pm8001_hba_info *pm8001_ha;
386 struct pm8001_device *pm8001_dev;
387 struct pm8001_port *port = NULL;
388 struct sas_task *t = task;
389 struct pm8001_ccb_info *ccb;
390 u32 tag = 0xdeadbeef, rc = 0, n_elem = 0;
391 unsigned long flags = 0;
392 enum sas_protocol task_proto = t->task_proto;
395 struct task_status_struct *tsm = &t->task_status;
396 tsm->resp = SAS_TASK_UNDELIVERED;
397 tsm->stat = SAS_PHY_DOWN;
398 if (dev->dev_type != SAS_SATA_DEV)
402 pm8001_ha = pm8001_find_ha_by_dev(task->dev);
403 if (pm8001_ha->controller_fatal_error) {
404 struct task_status_struct *ts = &t->task_status;
406 ts->resp = SAS_TASK_UNDELIVERED;
410 pm8001_dbg(pm8001_ha, IO, "pm8001_task_exec device\n");
411 spin_lock_irqsave(&pm8001_ha->lock, flags);
414 pm8001_dev = dev->lldd_dev;
415 port = &pm8001_ha->port[sas_find_local_port_id(dev)];
416 if (DEV_IS_GONE(pm8001_dev) || !port->port_attached) {
417 if (sas_protocol_ata(task_proto)) {
418 struct task_status_struct *ts = &t->task_status;
419 ts->resp = SAS_TASK_UNDELIVERED;
420 ts->stat = SAS_PHY_DOWN;
422 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
424 spin_lock_irqsave(&pm8001_ha->lock, flags);
427 struct task_status_struct *ts = &t->task_status;
428 ts->resp = SAS_TASK_UNDELIVERED;
429 ts->stat = SAS_PHY_DOWN;
434 rc = pm8001_tag_alloc(pm8001_ha, &tag);
437 ccb = &pm8001_ha->ccb_info[tag];
439 if (!sas_protocol_ata(task_proto)) {
440 if (t->num_scatter) {
441 n_elem = dma_map_sg(pm8001_ha->dev,
451 n_elem = t->num_scatter;
455 ccb->n_elem = n_elem;
458 ccb->device = pm8001_dev;
459 switch (task_proto) {
460 case SAS_PROTOCOL_SMP:
461 atomic_inc(&pm8001_dev->running_req);
462 rc = pm8001_task_prep_smp(pm8001_ha, ccb);
464 case SAS_PROTOCOL_SSP:
465 atomic_inc(&pm8001_dev->running_req);
467 rc = pm8001_task_prep_ssp_tm(pm8001_ha,
470 rc = pm8001_task_prep_ssp(pm8001_ha, ccb);
472 case SAS_PROTOCOL_SATA:
473 case SAS_PROTOCOL_STP:
474 atomic_inc(&pm8001_dev->running_req);
475 rc = pm8001_task_prep_ata(pm8001_ha, ccb);
478 dev_printk(KERN_ERR, pm8001_ha->dev,
479 "unknown sas_task proto: 0x%x\n", task_proto);
485 pm8001_dbg(pm8001_ha, IO, "rc is %x\n", rc);
486 atomic_dec(&pm8001_dev->running_req);
489 /* TODO: select normal or high priority */
490 spin_lock(&t->task_state_lock);
491 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
492 spin_unlock(&t->task_state_lock);
498 pm8001_tag_free(pm8001_ha, tag);
500 dev_printk(KERN_ERR, pm8001_ha->dev, "pm8001 exec failed[%d]!\n", rc);
501 if (!sas_protocol_ata(task_proto))
503 dma_unmap_sg(pm8001_ha->dev, t->scatter, t->num_scatter,
506 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
511 * pm8001_queue_command - register for upper layer used, all IO commands sent
512 * to HBA are from this interface.
513 * @task: the task to be execute.
514 * @gfp_flags: gfp_flags
516 int pm8001_queue_command(struct sas_task *task, gfp_t gfp_flags)
518 return pm8001_task_exec(task, gfp_flags, 0, NULL);
522 * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
523 * @pm8001_ha: our hba card information
524 * @ccb: the ccb which attached to ssp task
525 * @task: the task to be free.
526 * @ccb_idx: ccb index.
528 void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
529 struct sas_task *task, struct pm8001_ccb_info *ccb, u32 ccb_idx)
531 struct ata_queued_cmd *qc;
532 struct pm8001_device *pm8001_dev;
536 if (!sas_protocol_ata(task->task_proto))
538 dma_unmap_sg(pm8001_ha->dev, task->scatter,
539 task->num_scatter, task->data_dir);
541 switch (task->task_proto) {
542 case SAS_PROTOCOL_SMP:
543 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
545 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
549 case SAS_PROTOCOL_SATA:
550 case SAS_PROTOCOL_STP:
551 case SAS_PROTOCOL_SSP:
557 if (sas_protocol_ata(task->task_proto)) {
558 // For SCSI/ATA commands uldd_task points to ata_queued_cmd
559 qc = task->uldd_task;
560 pm8001_dev = ccb->device;
561 trace_pm80xx_request_complete(pm8001_ha->id,
562 pm8001_dev ? pm8001_dev->attached_phy : PM8001_MAX_PHYS,
563 ccb_idx, 0 /* ctlr_opcode not known */,
564 qc ? qc->tf.command : 0, // ata opcode
565 pm8001_dev ? atomic_read(&pm8001_dev->running_req) : -1);
568 task->lldd_task = NULL;
570 ccb->ccb_tag = 0xFFFFFFFF;
572 pm8001_tag_free(pm8001_ha, ccb_idx);
576 * pm8001_alloc_dev - find a empty pm8001_device
577 * @pm8001_ha: our hba card information
579 static struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
582 for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
583 if (pm8001_ha->devices[dev].dev_type == SAS_PHY_UNUSED) {
584 pm8001_ha->devices[dev].id = dev;
585 return &pm8001_ha->devices[dev];
588 if (dev == PM8001_MAX_DEVICES) {
589 pm8001_dbg(pm8001_ha, FAIL,
590 "max support %d devices, ignore ..\n",
596 * pm8001_find_dev - find a matching pm8001_device
597 * @pm8001_ha: our hba card information
598 * @device_id: device ID to match against
600 struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,
604 for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
605 if (pm8001_ha->devices[dev].device_id == device_id)
606 return &pm8001_ha->devices[dev];
608 if (dev == PM8001_MAX_DEVICES) {
609 pm8001_dbg(pm8001_ha, FAIL, "NO MATCHING DEVICE FOUND !!!\n");
614 void pm8001_free_dev(struct pm8001_device *pm8001_dev)
616 u32 id = pm8001_dev->id;
617 memset(pm8001_dev, 0, sizeof(*pm8001_dev));
619 pm8001_dev->dev_type = SAS_PHY_UNUSED;
620 pm8001_dev->device_id = PM8001_MAX_DEVICES;
621 pm8001_dev->sas_device = NULL;
625 * pm8001_dev_found_notify - libsas notify a device is found.
626 * @dev: the device structure which sas layer used.
628 * when libsas find a sas domain device, it should tell the LLDD that
629 * device is found, and then LLDD register this device to HBA firmware
630 * by the command "OPC_INB_REG_DEV", after that the HBA will assign a
631 * device ID(according to device's sas address) and returned it to LLDD. From
632 * now on, we communicate with HBA FW with the device ID which HBA assigned
633 * rather than sas address. it is the necessary step for our HBA but it is
634 * the optional for other HBA driver.
636 static int pm8001_dev_found_notify(struct domain_device *dev)
638 unsigned long flags = 0;
640 struct pm8001_hba_info *pm8001_ha = NULL;
641 struct domain_device *parent_dev = dev->parent;
642 struct pm8001_device *pm8001_device;
643 DECLARE_COMPLETION_ONSTACK(completion);
645 pm8001_ha = pm8001_find_ha_by_dev(dev);
646 spin_lock_irqsave(&pm8001_ha->lock, flags);
648 pm8001_device = pm8001_alloc_dev(pm8001_ha);
649 if (!pm8001_device) {
653 pm8001_device->sas_device = dev;
654 dev->lldd_dev = pm8001_device;
655 pm8001_device->dev_type = dev->dev_type;
656 pm8001_device->dcompletion = &completion;
657 if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
660 for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys;
662 phy = &parent_dev->ex_dev.ex_phy[phy_id];
663 if (SAS_ADDR(phy->attached_sas_addr)
664 == SAS_ADDR(dev->sas_addr)) {
665 pm8001_device->attached_phy = phy_id;
669 if (phy_id == parent_dev->ex_dev.num_phys) {
670 pm8001_dbg(pm8001_ha, FAIL,
671 "Error: no attached dev:%016llx at ex:%016llx.\n",
672 SAS_ADDR(dev->sas_addr),
673 SAS_ADDR(parent_dev->sas_addr));
677 if (dev->dev_type == SAS_SATA_DEV) {
678 pm8001_device->attached_phy =
679 dev->rphy->identify.phy_identifier;
680 flag = 1; /* directly sata */
682 } /*register this device to HBA*/
683 pm8001_dbg(pm8001_ha, DISC, "Found device\n");
684 PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
685 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
686 wait_for_completion(&completion);
687 if (dev->dev_type == SAS_END_DEVICE)
689 pm8001_ha->flags = PM8001F_RUN_TIME;
692 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
696 int pm8001_dev_found(struct domain_device *dev)
698 return pm8001_dev_found_notify(dev);
701 void pm8001_task_done(struct sas_task *task)
703 del_timer(&task->slow_task->timer);
704 complete(&task->slow_task->completion);
707 static void pm8001_tmf_timedout(struct timer_list *t)
709 struct sas_task_slow *slow = from_timer(slow, t, timer);
710 struct sas_task *task = slow->task;
713 spin_lock_irqsave(&task->task_state_lock, flags);
714 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
715 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
716 complete(&task->slow_task->completion);
718 spin_unlock_irqrestore(&task->task_state_lock, flags);
721 #define PM8001_TASK_TIMEOUT 20
723 * pm8001_exec_internal_tmf_task - execute some task management commands.
724 * @dev: the wanted device.
725 * @tmf: which task management wanted to be take.
726 * @para_len: para_len.
727 * @parameter: ssp task parameter.
729 * when errors or exception happened, we may want to do something, for example
730 * abort the issued task which result in this exception, it is done by calling
731 * this function, note it is also with the task execute interface.
733 static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
734 void *parameter, u32 para_len, struct pm8001_tmf_task *tmf)
737 struct sas_task *task = NULL;
738 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
739 struct pm8001_device *pm8001_dev = dev->lldd_dev;
740 DECLARE_COMPLETION_ONSTACK(completion_setstate);
742 for (retry = 0; retry < 3; retry++) {
743 task = sas_alloc_slow_task(GFP_KERNEL);
748 task->task_proto = dev->tproto;
749 memcpy(&task->ssp_task, parameter, para_len);
750 task->task_done = pm8001_task_done;
751 task->slow_task->timer.function = pm8001_tmf_timedout;
752 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
753 add_timer(&task->slow_task->timer);
755 res = pm8001_task_exec(task, GFP_KERNEL, 1, tmf);
758 del_timer(&task->slow_task->timer);
759 pm8001_dbg(pm8001_ha, FAIL, "Executing internal task failed\n");
762 wait_for_completion(&task->slow_task->completion);
763 if (pm8001_ha->chip_id != chip_8001) {
764 pm8001_dev->setds_completion = &completion_setstate;
765 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
766 pm8001_dev, DS_OPERATIONAL);
767 wait_for_completion(&completion_setstate);
769 res = -TMF_RESP_FUNC_FAILED;
770 /* Even TMF timed out, return direct. */
771 if (task->task_state_flags & SAS_TASK_STATE_ABORTED) {
772 struct pm8001_ccb_info *ccb = task->lldd_task;
774 pm8001_dbg(pm8001_ha, FAIL, "TMF task[%x]timeout.\n",
782 if (task->task_status.resp == SAS_TASK_COMPLETE &&
783 task->task_status.stat == SAS_SAM_STAT_GOOD) {
784 res = TMF_RESP_FUNC_COMPLETE;
788 if (task->task_status.resp == SAS_TASK_COMPLETE &&
789 task->task_status.stat == SAS_DATA_UNDERRUN) {
790 /* no error, but return the number of bytes of
792 res = task->task_status.residual;
796 if (task->task_status.resp == SAS_TASK_COMPLETE &&
797 task->task_status.stat == SAS_DATA_OVERRUN) {
798 pm8001_dbg(pm8001_ha, FAIL, "Blocked task error.\n");
802 pm8001_dbg(pm8001_ha, EH,
803 " Task to dev %016llx response:0x%x status 0x%x\n",
804 SAS_ADDR(dev->sas_addr),
805 task->task_status.resp,
806 task->task_status.stat);
812 BUG_ON(retry == 3 && task != NULL);
818 pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
819 struct pm8001_device *pm8001_dev, struct domain_device *dev, u32 flag,
824 struct pm8001_ccb_info *ccb;
825 struct sas_task *task = NULL;
827 for (retry = 0; retry < 3; retry++) {
828 task = sas_alloc_slow_task(GFP_KERNEL);
833 task->task_proto = dev->tproto;
834 task->task_done = pm8001_task_done;
835 task->slow_task->timer.function = pm8001_tmf_timedout;
836 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ;
837 add_timer(&task->slow_task->timer);
839 res = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
842 ccb = &pm8001_ha->ccb_info[ccb_tag];
843 ccb->device = pm8001_dev;
844 ccb->ccb_tag = ccb_tag;
848 res = PM8001_CHIP_DISP->task_abort(pm8001_ha,
849 pm8001_dev, flag, task_tag, ccb_tag);
852 del_timer(&task->slow_task->timer);
853 pm8001_dbg(pm8001_ha, FAIL, "Executing internal task failed\n");
856 wait_for_completion(&task->slow_task->completion);
857 res = TMF_RESP_FUNC_FAILED;
858 /* Even TMF timed out, return direct. */
859 if (task->task_state_flags & SAS_TASK_STATE_ABORTED) {
860 pm8001_dbg(pm8001_ha, FAIL, "TMF task timeout.\n");
864 if (task->task_status.resp == SAS_TASK_COMPLETE &&
865 task->task_status.stat == SAS_SAM_STAT_GOOD) {
866 res = TMF_RESP_FUNC_COMPLETE;
870 pm8001_dbg(pm8001_ha, EH,
871 " Task to dev %016llx response: 0x%x status 0x%x\n",
872 SAS_ADDR(dev->sas_addr),
873 task->task_status.resp,
874 task->task_status.stat);
880 BUG_ON(retry == 3 && task != NULL);
886 * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
887 * @dev: the device structure which sas layer used.
889 static void pm8001_dev_gone_notify(struct domain_device *dev)
891 unsigned long flags = 0;
892 struct pm8001_hba_info *pm8001_ha;
893 struct pm8001_device *pm8001_dev = dev->lldd_dev;
895 pm8001_ha = pm8001_find_ha_by_dev(dev);
896 spin_lock_irqsave(&pm8001_ha->lock, flags);
898 u32 device_id = pm8001_dev->device_id;
900 pm8001_dbg(pm8001_ha, DISC, "found dev[%d:%x] is gone.\n",
901 pm8001_dev->device_id, pm8001_dev->dev_type);
902 if (atomic_read(&pm8001_dev->running_req)) {
903 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
904 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
906 while (atomic_read(&pm8001_dev->running_req))
908 spin_lock_irqsave(&pm8001_ha->lock, flags);
910 PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
911 pm8001_free_dev(pm8001_dev);
913 pm8001_dbg(pm8001_ha, DISC, "Found dev has gone.\n");
915 dev->lldd_dev = NULL;
916 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
919 void pm8001_dev_gone(struct domain_device *dev)
921 pm8001_dev_gone_notify(dev);
924 static int pm8001_issue_ssp_tmf(struct domain_device *dev,
925 u8 *lun, struct pm8001_tmf_task *tmf)
927 struct sas_ssp_task ssp_task;
928 if (!(dev->tproto & SAS_PROTOCOL_SSP))
929 return TMF_RESP_FUNC_ESUPP;
931 memcpy((u8 *)&ssp_task.LUN, lun, 8);
932 return pm8001_exec_internal_tmf_task(dev, &ssp_task, sizeof(ssp_task),
936 /* retry commands by ha, by task and/or by device */
937 void pm8001_open_reject_retry(
938 struct pm8001_hba_info *pm8001_ha,
939 struct sas_task *task_to_close,
940 struct pm8001_device *device_to_close)
945 if (pm8001_ha == NULL)
948 spin_lock_irqsave(&pm8001_ha->lock, flags);
950 for (i = 0; i < PM8001_MAX_CCB; i++) {
951 struct sas_task *task;
952 struct task_status_struct *ts;
953 struct pm8001_device *pm8001_dev;
954 unsigned long flags1;
956 struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];
958 pm8001_dev = ccb->device;
959 if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))
961 if (!device_to_close) {
962 uintptr_t d = (uintptr_t)pm8001_dev
963 - (uintptr_t)&pm8001_ha->devices;
964 if (((d % sizeof(*pm8001_dev)) != 0)
965 || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES))
967 } else if (pm8001_dev != device_to_close)
970 if (!tag || (tag == 0xFFFFFFFF))
973 if (!task || !task->task_done)
975 if (task_to_close && (task != task_to_close))
977 ts = &task->task_status;
978 ts->resp = SAS_TASK_COMPLETE;
979 /* Force the midlayer to retry */
980 ts->stat = SAS_OPEN_REJECT;
981 ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
983 atomic_dec(&pm8001_dev->running_req);
984 spin_lock_irqsave(&task->task_state_lock, flags1);
985 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
986 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
987 task->task_state_flags |= SAS_TASK_STATE_DONE;
988 if (unlikely((task->task_state_flags
989 & SAS_TASK_STATE_ABORTED))) {
990 spin_unlock_irqrestore(&task->task_state_lock,
992 pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
994 spin_unlock_irqrestore(&task->task_state_lock,
996 pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
997 mb();/* in order to force CPU ordering */
998 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
999 task->task_done(task);
1000 spin_lock_irqsave(&pm8001_ha->lock, flags);
1004 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
1008 * pm8001_I_T_nexus_reset() - reset the initiator/target connection
1009 * @dev: the device structure for the device to reset.
1011 * Standard mandates link reset for ATA (type 0) and hard reset for
1012 * SSP (type 1), only for RECOVERY
1014 int pm8001_I_T_nexus_reset(struct domain_device *dev)
1016 int rc = TMF_RESP_FUNC_FAILED;
1017 struct pm8001_device *pm8001_dev;
1018 struct pm8001_hba_info *pm8001_ha;
1019 struct sas_phy *phy;
1021 if (!dev || !dev->lldd_dev)
1024 pm8001_dev = dev->lldd_dev;
1025 pm8001_ha = pm8001_find_ha_by_dev(dev);
1026 phy = sas_get_local_phy(dev);
1028 if (dev_is_sata(dev)) {
1029 if (scsi_is_sas_phy_local(phy)) {
1033 rc = sas_phy_reset(phy, 1);
1035 pm8001_dbg(pm8001_ha, EH,
1036 "phy reset failed for device %x\n"
1037 "with rc %d\n", pm8001_dev->device_id, rc);
1038 rc = TMF_RESP_FUNC_FAILED;
1042 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1045 pm8001_dbg(pm8001_ha, EH, "task abort failed %x\n"
1046 "with rc %d\n", pm8001_dev->device_id, rc);
1047 rc = TMF_RESP_FUNC_FAILED;
1050 rc = sas_phy_reset(phy, 1);
1053 pm8001_dbg(pm8001_ha, EH, " for device[%x]:rc=%d\n",
1054 pm8001_dev->device_id, rc);
1056 sas_put_local_phy(phy);
1061 * This function handle the IT_NEXUS_XXX event or completion
1062 * status code for SSP/SATA/SMP I/O request.
1064 int pm8001_I_T_nexus_event_handler(struct domain_device *dev)
1066 int rc = TMF_RESP_FUNC_FAILED;
1067 struct pm8001_device *pm8001_dev;
1068 struct pm8001_hba_info *pm8001_ha;
1069 struct sas_phy *phy;
1071 if (!dev || !dev->lldd_dev)
1074 pm8001_dev = dev->lldd_dev;
1075 pm8001_ha = pm8001_find_ha_by_dev(dev);
1077 pm8001_dbg(pm8001_ha, EH, "I_T_Nexus handler invoked !!\n");
1079 phy = sas_get_local_phy(dev);
1081 if (dev_is_sata(dev)) {
1082 DECLARE_COMPLETION_ONSTACK(completion_setstate);
1083 if (scsi_is_sas_phy_local(phy)) {
1087 /* send internal ssp/sata/smp abort command to FW */
1088 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1092 /* deregister the target device */
1093 pm8001_dev_gone_notify(dev);
1096 /*send phy reset to hard reset target */
1097 rc = sas_phy_reset(phy, 1);
1099 pm8001_dev->setds_completion = &completion_setstate;
1101 wait_for_completion(&completion_setstate);
1103 /* send internal ssp/sata/smp abort command to FW */
1104 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1108 /* deregister the target device */
1109 pm8001_dev_gone_notify(dev);
1112 /*send phy reset to hard reset target */
1113 rc = sas_phy_reset(phy, 1);
1116 pm8001_dbg(pm8001_ha, EH, " for device[%x]:rc=%d\n",
1117 pm8001_dev->device_id, rc);
1119 sas_put_local_phy(phy);
1123 /* mandatory SAM-3, the task reset the specified LUN*/
1124 int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
1126 int rc = TMF_RESP_FUNC_FAILED;
1127 struct pm8001_tmf_task tmf_task;
1128 struct pm8001_device *pm8001_dev = dev->lldd_dev;
1129 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1130 DECLARE_COMPLETION_ONSTACK(completion_setstate);
1131 if (dev_is_sata(dev)) {
1132 struct sas_phy *phy = sas_get_local_phy(dev);
1133 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1135 rc = sas_phy_reset(phy, 1);
1136 sas_put_local_phy(phy);
1137 pm8001_dev->setds_completion = &completion_setstate;
1138 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1139 pm8001_dev, DS_OPERATIONAL);
1140 wait_for_completion(&completion_setstate);
1142 tmf_task.tmf = TMF_LU_RESET;
1143 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1145 /* If failed, fall-through I_T_Nexus reset */
1146 pm8001_dbg(pm8001_ha, EH, "for device[%x]:rc=%d\n",
1147 pm8001_dev->device_id, rc);
1151 /* optional SAM-3 */
1152 int pm8001_query_task(struct sas_task *task)
1154 u32 tag = 0xdeadbeef;
1155 struct scsi_lun lun;
1156 struct pm8001_tmf_task tmf_task;
1157 int rc = TMF_RESP_FUNC_FAILED;
1158 if (unlikely(!task || !task->lldd_task || !task->dev))
1161 if (task->task_proto & SAS_PROTOCOL_SSP) {
1162 struct scsi_cmnd *cmnd = task->uldd_task;
1163 struct domain_device *dev = task->dev;
1164 struct pm8001_hba_info *pm8001_ha =
1165 pm8001_find_ha_by_dev(dev);
1167 int_to_scsilun(cmnd->device->lun, &lun);
1168 rc = pm8001_find_tag(task, &tag);
1170 rc = TMF_RESP_FUNC_FAILED;
1173 pm8001_dbg(pm8001_ha, EH, "Query:[%16ph]\n", cmnd->cmnd);
1174 tmf_task.tmf = TMF_QUERY_TASK;
1175 tmf_task.tag_of_task_to_be_managed = tag;
1177 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1179 /* The task is still in Lun, release it then */
1180 case TMF_RESP_FUNC_SUCC:
1181 pm8001_dbg(pm8001_ha, EH,
1182 "The task is still in Lun\n");
1184 /* The task is not in Lun or failed, reset the phy */
1185 case TMF_RESP_FUNC_FAILED:
1186 case TMF_RESP_FUNC_COMPLETE:
1187 pm8001_dbg(pm8001_ha, EH,
1188 "The task is not in Lun or failed, reset the phy\n");
1192 pr_err("pm80xx: rc= %d\n", rc);
1196 /* mandatory SAM-3, still need free task/ccb info, abort the specified task */
1197 int pm8001_abort_task(struct sas_task *task)
1199 unsigned long flags;
1201 struct domain_device *dev ;
1202 struct pm8001_hba_info *pm8001_ha;
1203 struct scsi_lun lun;
1204 struct pm8001_device *pm8001_dev;
1205 struct pm8001_tmf_task tmf_task;
1206 int rc = TMF_RESP_FUNC_FAILED, ret;
1207 u32 phy_id, port_id;
1208 struct sas_task_slow slow_task;
1210 if (unlikely(!task || !task->lldd_task || !task->dev))
1211 return TMF_RESP_FUNC_FAILED;
1214 pm8001_dev = dev->lldd_dev;
1215 pm8001_ha = pm8001_find_ha_by_dev(dev);
1216 phy_id = pm8001_dev->attached_phy;
1218 if (PM8001_CHIP_DISP->fatal_errors(pm8001_ha)) {
1219 // If the controller is seeing fatal errors
1220 // abort task will not get a response from the controller
1221 return TMF_RESP_FUNC_FAILED;
1224 ret = pm8001_find_tag(task, &tag);
1226 pm8001_info(pm8001_ha, "no tag for task:%p\n", task);
1227 return TMF_RESP_FUNC_FAILED;
1229 spin_lock_irqsave(&task->task_state_lock, flags);
1230 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1231 spin_unlock_irqrestore(&task->task_state_lock, flags);
1232 return TMF_RESP_FUNC_COMPLETE;
1234 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1235 if (task->slow_task == NULL) {
1236 init_completion(&slow_task.completion);
1237 task->slow_task = &slow_task;
1239 spin_unlock_irqrestore(&task->task_state_lock, flags);
1240 if (task->task_proto & SAS_PROTOCOL_SSP) {
1241 struct scsi_cmnd *cmnd = task->uldd_task;
1242 int_to_scsilun(cmnd->device->lun, &lun);
1243 tmf_task.tmf = TMF_ABORT_TASK;
1244 tmf_task.tag_of_task_to_be_managed = tag;
1245 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1246 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1247 pm8001_dev->sas_device, 0, tag);
1248 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1249 task->task_proto & SAS_PROTOCOL_STP) {
1250 if (pm8001_ha->chip_id == chip_8006) {
1251 DECLARE_COMPLETION_ONSTACK(completion_reset);
1252 DECLARE_COMPLETION_ONSTACK(completion);
1253 struct pm8001_phy *phy = pm8001_ha->phy + phy_id;
1254 port_id = phy->port->port_id;
1256 /* 1. Set Device state as Recovery */
1257 pm8001_dev->setds_completion = &completion;
1258 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1259 pm8001_dev, DS_IN_RECOVERY);
1260 wait_for_completion(&completion);
1262 /* 2. Send Phy Control Hard Reset */
1263 reinit_completion(&completion);
1264 phy->port_reset_status = PORT_RESET_TMO;
1265 phy->reset_success = false;
1266 phy->enable_completion = &completion;
1267 phy->reset_completion = &completion_reset;
1268 ret = PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
1271 phy->enable_completion = NULL;
1272 phy->reset_completion = NULL;
1276 /* In the case of the reset timeout/fail we still
1277 * abort the command at the firmware. The assumption
1278 * here is that the drive is off doing something so
1279 * that it's not processing requests, and we want to
1280 * avoid getting a completion for this and either
1281 * leaking the task in libsas or losing the race and
1282 * getting a double free.
1284 pm8001_dbg(pm8001_ha, MSG,
1285 "Waiting for local phy ctl\n");
1286 ret = wait_for_completion_timeout(&completion,
1287 PM8001_TASK_TIMEOUT * HZ);
1288 if (!ret || !phy->reset_success) {
1289 phy->enable_completion = NULL;
1290 phy->reset_completion = NULL;
1292 /* 3. Wait for Port Reset complete or
1295 pm8001_dbg(pm8001_ha, MSG,
1296 "Waiting for Port reset\n");
1297 ret = wait_for_completion_timeout(
1299 PM8001_TASK_TIMEOUT * HZ);
1301 phy->reset_completion = NULL;
1302 WARN_ON(phy->port_reset_status ==
1304 if (phy->port_reset_status == PORT_RESET_TMO) {
1305 pm8001_dev_gone_notify(dev);
1306 PM8001_CHIP_DISP->hw_event_ack_req(
1308 0x07, /*HW_EVENT_PHY_DOWN ack*/
1309 port_id, phy_id, 0, 0);
1316 * we wait for the task to be aborted so that the task
1317 * is removed from the ccb. on success the caller is
1318 * going to free the task.
1320 ret = pm8001_exec_internal_task_abort(pm8001_ha,
1321 pm8001_dev, pm8001_dev->sas_device, 1, tag);
1324 ret = wait_for_completion_timeout(
1325 &task->slow_task->completion,
1326 PM8001_TASK_TIMEOUT * HZ);
1330 /* 5. Set Device State as Operational */
1331 reinit_completion(&completion);
1332 pm8001_dev->setds_completion = &completion;
1333 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1334 pm8001_dev, DS_OPERATIONAL);
1335 wait_for_completion(&completion);
1337 rc = pm8001_exec_internal_task_abort(pm8001_ha,
1338 pm8001_dev, pm8001_dev->sas_device, 0, tag);
1340 rc = TMF_RESP_FUNC_COMPLETE;
1341 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1343 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1344 pm8001_dev->sas_device, 0, tag);
1348 spin_lock_irqsave(&task->task_state_lock, flags);
1349 if (task->slow_task == &slow_task)
1350 task->slow_task = NULL;
1351 spin_unlock_irqrestore(&task->task_state_lock, flags);
1352 if (rc != TMF_RESP_FUNC_COMPLETE)
1353 pm8001_info(pm8001_ha, "rc= %d\n", rc);
1357 int pm8001_abort_task_set(struct domain_device *dev, u8 *lun)
1359 struct pm8001_tmf_task tmf_task;
1361 tmf_task.tmf = TMF_ABORT_TASK_SET;
1362 return pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1365 int pm8001_clear_aca(struct domain_device *dev, u8 *lun)
1367 struct pm8001_tmf_task tmf_task;
1369 tmf_task.tmf = TMF_CLEAR_ACA;
1370 return pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1373 int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
1375 struct pm8001_tmf_task tmf_task;
1376 struct pm8001_device *pm8001_dev = dev->lldd_dev;
1377 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1379 pm8001_dbg(pm8001_ha, EH, "I_T_L_Q clear task set[%x]\n",
1380 pm8001_dev->device_id);
1381 tmf_task.tmf = TMF_CLEAR_TASK_SET;
1382 return pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1385 void pm8001_port_formed(struct asd_sas_phy *sas_phy)
1387 struct sas_ha_struct *sas_ha = sas_phy->ha;
1388 struct pm8001_hba_info *pm8001_ha = sas_ha->lldd_ha;
1389 struct pm8001_phy *phy = sas_phy->lldd_phy;
1390 struct asd_sas_port *sas_port = sas_phy->port;
1391 struct pm8001_port *port = phy->port;
1394 pm8001_dbg(pm8001_ha, FAIL, "Received null port\n");
1397 sas_port->lldd_port = port;