diff options
Diffstat (limited to 'drivers/scsi/pm8001/pm8001_sas.c')
| -rw-r--r-- | drivers/scsi/pm8001/pm8001_sas.c | 1152 |
1 files changed, 1152 insertions, 0 deletions
diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c new file mode 100644 index 000000000000..7f9c83a76390 --- /dev/null +++ b/drivers/scsi/pm8001/pm8001_sas.c @@ -0,0 +1,1152 @@ +/* + * PMC-Sierra SPC 8001 SAS/SATA based host adapters driver + * + * Copyright (c) 2008-2009 USI Co., Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + * + */ + +#include "pm8001_sas.h" + +/** + * pm8001_find_tag - from sas task to find out tag that belongs to this task + * @task: the task sent to the LLDD + * @tag: the found tag associated with the task + */ +static int pm8001_find_tag(struct sas_task *task, u32 *tag) +{ + if (task->lldd_task) { + struct pm8001_ccb_info *ccb; + ccb = task->lldd_task; + *tag = ccb->ccb_tag; + return 1; + } + return 0; +} + +/** + * pm8001_tag_clear - clear the tags bitmap + * @pm8001_ha: our hba struct + * @tag: the found tag associated with the task + */ +static void pm8001_tag_clear(struct pm8001_hba_info *pm8001_ha, u32 tag) +{ + void *bitmap = pm8001_ha->tags; + clear_bit(tag, bitmap); +} + +static void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag) +{ + pm8001_tag_clear(pm8001_ha, tag); +} + +static void pm8001_tag_set(struct pm8001_hba_info *pm8001_ha, u32 tag) +{ + void *bitmap = pm8001_ha->tags; + set_bit(tag, bitmap); +} + +/** + * pm8001_tag_alloc - allocate a empty tag for task used. + * @pm8001_ha: our hba struct + * @tag_out: the found empty tag . + */ +inline int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out) +{ + unsigned int index, tag; + void *bitmap = pm8001_ha->tags; + + index = find_first_zero_bit(bitmap, pm8001_ha->tags_num); + tag = index; + if (tag >= pm8001_ha->tags_num) + return -SAS_QUEUE_FULL; + pm8001_tag_set(pm8001_ha, tag); + *tag_out = tag; + return 0; +} + +void pm8001_tag_init(struct pm8001_hba_info *pm8001_ha) +{ + int i; + for (i = 0; i < pm8001_ha->tags_num; ++i) + pm8001_tag_clear(pm8001_ha, i); +} + + /** + * pm8001_mem_alloc - allocate memory for pm8001. + * @pdev: pci device. + * @virt_addr: the allocated virtual address + * @pphys_addr_hi: the physical address high byte address. + * @pphys_addr_lo: the physical address low byte address. + * @mem_size: memory size. + */ +int pm8001_mem_alloc(struct pci_dev *pdev, void **virt_addr, + dma_addr_t *pphys_addr, u32 *pphys_addr_hi, + u32 *pphys_addr_lo, u32 mem_size, u32 align) +{ + caddr_t mem_virt_alloc; + dma_addr_t mem_dma_handle; + u64 phys_align; + u64 align_offset = 0; + if (align) + align_offset = (dma_addr_t)align - 1; + mem_virt_alloc = + pci_alloc_consistent(pdev, mem_size + align, &mem_dma_handle); + if (!mem_virt_alloc) { + pm8001_printk("memory allocation error\n"); + return -1; + } + memset((void *)mem_virt_alloc, 0, mem_size+align); + *pphys_addr = mem_dma_handle; + phys_align = (*pphys_addr + align_offset) & ~align_offset; + *virt_addr = (void *)mem_virt_alloc + phys_align - *pphys_addr; + *pphys_addr_hi = upper_32_bits(phys_align); + *pphys_addr_lo = lower_32_bits(phys_align); + return 0; +} +/** + * pm8001_find_ha_by_dev - from domain device which come from sas layer to + * find out our hba struct. + * @dev: the domain device which from sas layer. + */ +static +struct pm8001_hba_info *pm8001_find_ha_by_dev(struct domain_device *dev) +{ + struct sas_ha_struct *sha = dev->port->ha; + struct pm8001_hba_info *pm8001_ha = sha->lldd_ha; + return pm8001_ha; +} + +/** + * pm8001_phy_control - this function should be registered to + * sas_domain_function_template to provide libsas used, note: this is just + * control the HBA phy rather than other expander phy if you want control + * other phy, you should use SMP command. + * @sas_phy: which phy in HBA phys. + * @func: the operation. + * @funcdata: always NULL. + */ +int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func, + void *funcdata) +{ + int rc = 0, phy_id = sas_phy->id; + struct pm8001_hba_info *pm8001_ha = NULL; + struct sas_phy_linkrates *rates; + DECLARE_COMPLETION_ONSTACK(completion); + pm8001_ha = sas_phy->ha->lldd_ha; + pm8001_ha->phy[phy_id].enable_completion = &completion; + switch (func) { + case PHY_FUNC_SET_LINK_RATE: + rates = funcdata; + if (rates->minimum_linkrate) { + pm8001_ha->phy[phy_id].minimum_linkrate = + rates->minimum_linkrate; + } + if (rates->maximum_linkrate) { + pm8001_ha->phy[phy_id].maximum_linkrate = + rates->maximum_linkrate; + } + if (pm8001_ha->phy[phy_id].phy_state == 0) { + PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id); + wait_for_completion(&completion); + } + PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id, + PHY_LINK_RESET); + break; + case PHY_FUNC_HARD_RESET: + if (pm8001_ha->phy[phy_id].phy_state == 0) { + PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id); + wait_for_completion(&completion); + } + PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id, + PHY_HARD_RESET); + break; + case PHY_FUNC_LINK_RESET: + if (pm8001_ha->phy[phy_id].phy_state == 0) { + PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id); + wait_for_completion(&completion); + } + PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id, + PHY_LINK_RESET); + break; + case PHY_FUNC_RELEASE_SPINUP_HOLD: + PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id, + PHY_LINK_RESET); + break; + case PHY_FUNC_DISABLE: + PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id); + break; + default: + rc = -EOPNOTSUPP; + } + msleep(300); + return rc; +} + +int pm8001_slave_alloc(struct scsi_device *scsi_dev) +{ + struct domain_device *dev = sdev_to_domain_dev(scsi_dev); + if (dev_is_sata(dev)) { + /* We don't need to rescan targets + * if REPORT_LUNS request is failed + */ + if (scsi_dev->lun > 0) + return -ENXIO; + scsi_dev->tagged_supported = 1; + } + return sas_slave_alloc(scsi_dev); +} + +/** + * pm8001_scan_start - we should enable all HBA phys by sending the phy_start + * command to HBA. + * @shost: the scsi host data. + */ +void pm8001_scan_start(struct Scsi_Host *shost) +{ + int i; + struct pm8001_hba_info *pm8001_ha; + struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost); + pm8001_ha = sha->lldd_ha; + PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha); + for (i = 0; i < pm8001_ha->chip->n_phy; ++i) + PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i); +} + +int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time) +{ + /* give the phy enabling interrupt event time to come in (1s + * is empirically about all it takes) */ + if (time < HZ) + return 0; + /* Wait for discovery to finish */ + scsi_flush_work(shost); + return 1; +} + +/** + * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task + * @pm8001_ha: our hba card information + * @ccb: the ccb which attached to smp task + */ +static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha, + struct pm8001_ccb_info *ccb) +{ + return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb); +} + +u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag) +{ + struct ata_queued_cmd *qc = task->uldd_task; + if (qc) { + if (qc->tf.command == ATA_CMD_FPDMA_WRITE || + qc->tf.command == ATA_CMD_FPDMA_READ) { + *tag = qc->tag; + return 1; + } + } + return 0; +} + +/** + * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task + * @pm8001_ha: our hba card information + * @ccb: the ccb which attached to sata task + */ +static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha, + struct pm8001_ccb_info *ccb) +{ + return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb); +} + +/** + * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data + * @pm8001_ha: our hba card information + * @ccb: the ccb which attached to TM + * @tmf: the task management IU + */ +static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha, + struct pm8001_ccb_info *ccb, struct pm8001_tmf_task *tmf) +{ + return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf); +} + +/** + * pm8001_task_prep_ssp - the dispatcher function,prepare ssp data for ssp task + * @pm8001_ha: our hba card information + * @ccb: the ccb which attached to ssp task + */ +static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha, + struct pm8001_ccb_info *ccb) +{ + return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb); +} +int pm8001_slave_configure(struct scsi_device *sdev) +{ + struct domain_device *dev = sdev_to_domain_dev(sdev); + int ret = sas_slave_configure(sdev); + if (ret) + return ret; + if (dev_is_sata(dev)) { + #ifdef PM8001_DISABLE_NCQ + struct ata_port *ap = dev->sata_dev.ap; + struct ata_device *adev = ap->link.device; + adev->flags |= ATA_DFLAG_NCQ_OFF; + scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, 1); + #endif + } + return 0; +} + /* Find the local port id that's attached to this device */ +static int sas_find_local_port_id(struct domain_device *dev) +{ + struct domain_device *pdev = dev->parent; + + /* Directly attached device */ + if (!pdev) + return dev->port->id; + while (pdev) { + struct domain_device *pdev_p = pdev->parent; + if (!pdev_p) + return pdev->port->id; + pdev = pdev->parent; + } + return 0; +} + +/** + * pm8001_task_exec - queue the task(ssp, smp && ata) to the hardware. + * @task: the task to be execute. + * @num: if can_queue great than 1, the task can be queued up. for SMP task, + * we always execute one one time. + * @gfp_flags: gfp_flags. + * @is_tmf: if it is task management task. + * @tmf: the task management IU + */ +#define DEV_IS_GONE(pm8001_dev) \ + ((!pm8001_dev || (pm8001_dev->dev_type == NO_DEVICE))) +static int pm8001_task_exec(struct sas_task *task, const int num, + gfp_t gfp_flags, int is_tmf, struct pm8001_tmf_task *tmf) +{ + struct domain_device *dev = task->dev; + struct pm8001_hba_info *pm8001_ha; + struct pm8001_device *pm8001_dev; + struct pm8001_port *port = NULL; + struct sas_task *t = task; + struct pm8001_ccb_info *ccb; + u32 tag = 0xdeadbeef, rc, n_elem = 0; + u32 n = num; + unsigned long flags = 0, flags_libsas = 0; + + if (!dev->port) { + struct task_status_struct *tsm = &t->task_status; + tsm->resp = SAS_TASK_UNDELIVERED; + tsm->stat = SAS_PHY_DOWN; + if (dev->dev_type != SATA_DEV) + t->task_done(t); + return 0; + } + pm8001_ha = pm8001_find_ha_by_dev(task->dev); + PM8001_IO_DBG(pm8001_ha, pm8001_printk("pm8001_task_exec device \n ")); + spin_lock_irqsave(&pm8001_ha->lock, flags); + do { + dev = t->dev; + pm8001_dev = dev->lldd_dev; + if (DEV_IS_GONE(pm8001_dev)) { + if (pm8001_dev) { + PM8001_IO_DBG(pm8001_ha, + pm8001_printk("device %d not ready.\n", + pm8001_dev->device_id)); + } else { + PM8001_IO_DBG(pm8001_ha, + pm8001_printk("device %016llx not " + "ready.\n", SAS_ADDR(dev->sas_addr))); + } + rc = SAS_PHY_DOWN; + goto out_done; + } + port = &pm8001_ha->port[sas_find_local_port_id(dev)]; + if (!port->port_attached) { + if (sas_protocol_ata(t->task_proto)) { + struct task_status_struct *ts = &t->task_status; + ts->resp = SAS_TASK_UNDELIVERED; + ts->stat = SAS_PHY_DOWN; + + spin_unlock_irqrestore(&pm8001_ha->lock, flags); + spin_unlock_irqrestore(dev->sata_dev.ap->lock, + flags_libsas); + t->task_done(t); + spin_lock_irqsave(dev->sata_dev.ap->lock, + flags_libsas); + spin_lock_irqsave(&pm8001_ha->lock, flags); + if (n > 1) + t = list_entry(t->list.next, + struct sas_task, list); + continue; + } else { + struct task_status_struct *ts = &t->task_status; + ts->resp = SAS_TASK_UNDELIVERED; + ts->stat = SAS_PHY_DOWN; + t->task_done(t); + if (n > 1) + t = list_entry(t->list.next, + struct sas_task, list); + continue; + } + } + rc = pm8001_tag_alloc(pm8001_ha, &tag); + if (rc) + goto err_out; + ccb = &pm8001_ha->ccb_info[tag]; + + if (!sas_protocol_ata(t->task_proto)) { + if (t->num_scatter) { + n_elem = dma_map_sg(pm8001_ha->dev, + t->scatter, + t->num_scatter, + t->data_dir); + if (!n_elem) { + rc = -ENOMEM; + goto err_out_tag; + } + } + } else { + n_elem = t->num_scatter; + } + + t->lldd_task = ccb; + ccb->n_elem = n_elem; + ccb->ccb_tag = tag; + ccb->task = t; + switch (t->task_proto) { + case SAS_PROTOCOL_SMP: + rc = pm8001_task_prep_smp(pm8001_ha, ccb); + break; + case SAS_PROTOCOL_SSP: + if (is_tmf) + rc = pm8001_task_prep_ssp_tm(pm8001_ha, + ccb, tmf); + else + rc = pm8001_task_prep_ssp(pm8001_ha, ccb); + break; + case SAS_PROTOCOL_SATA: + case SAS_PROTOCOL_STP: + case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP: + rc = pm8001_task_prep_ata(pm8001_ha, ccb); + break; + default: + dev_printk(KERN_ERR, pm8001_ha->dev, + "unknown sas_task proto: 0x%x\n", + t->task_proto); + rc = -EINVAL; + break; + } + + if (rc) { + PM8001_IO_DBG(pm8001_ha, + pm8001_printk("rc is %x\n", rc)); + goto err_out_tag; + } + /* TODO: select normal or high priority */ + spin_lock(&t->task_state_lock); + t->task_state_flags |= SAS_TASK_AT_INITIATOR; + spin_unlock(&t->task_state_lock); + pm8001_dev->running_req++; + if (n > 1) + t = list_entry(t->list.next, struct sas_task, list); + } while (--n); + rc = 0; + goto out_done; + +err_out_tag: + pm8001_tag_free(pm8001_ha, tag); +err_out: + dev_printk(KERN_ERR, pm8001_ha->dev, "pm8001 exec failed[%d]!\n", rc); + if (!sas_protocol_ata(t->task_proto)) + if (n_elem) + dma_unmap_sg(pm8001_ha->dev, t->scatter, n_elem, + t->data_dir); +out_done: + spin_unlock_irqrestore(&pm8001_ha->lock, flags); + return rc; +} + +/** + * pm8001_queue_command - register for upper layer used, all IO commands sent + * to HBA are from this interface. + * @task: the task to be execute. + * @num: if can_queue great than 1, the task can be queued up. for SMP task, + * we always execute one one time + * @gfp_flags: gfp_flags + */ +int pm8001_queue_command(struct sas_task *task, const int num, + gfp_t gfp_flags) +{ + return pm8001_task_exec(task, num, gfp_flags, 0, NULL); +} + +void pm8001_ccb_free(struct pm8001_hba_info *pm8001_ha, u32 ccb_idx) +{ + pm8001_tag_clear(pm8001_ha, ccb_idx); +} + +/** + * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb. + * @pm8001_ha: our hba card information + * @ccb: the ccb which attached to ssp task + * @task: the task to be free. + * @ccb_idx: ccb index. + */ +void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha, + struct sas_task *task, struct pm8001_ccb_info *ccb, u32 ccb_idx) +{ + if (!ccb->task) + return; + if (!sas_protocol_ata(task->task_proto)) + if (ccb->n_elem) + dma_unmap_sg(pm8001_ha->dev, task->scatter, + task->num_scatter, task->data_dir); + + switch (task->task_proto) { + case SAS_PROTOCOL_SMP: + dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1, + PCI_DMA_FROMDEVICE); + dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1, + PCI_DMA_TODEVICE); + break; + + case SAS_PROTOCOL_SATA: + case SAS_PROTOCOL_STP: + case SAS_PROTOCOL_SSP: + default: + /* do nothing */ + break; + } + task->lldd_task = NULL; + ccb->task = NULL; + ccb->ccb_tag = 0xFFFFFFFF; + pm8001_ccb_free(pm8001_ha, ccb_idx); +} + + /** + * pm8001_alloc_dev - find a empty pm8001_device + * @pm8001_ha: our hba card information + */ +struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha) +{ + u32 dev; + for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) { + if (pm8001_ha->devices[dev].dev_type == NO_DEVICE) { + pm8001_ha->devices[dev].id = dev; + return &pm8001_ha->devices[dev]; + } + } + if (dev == PM8001_MAX_DEVICES) { + PM8001_FAIL_DBG(pm8001_ha, + pm8001_printk("max support %d devices, ignore ..\n", + PM8001_MAX_DEVICES)); + } + return NULL; +} + +static void pm8001_free_dev(struct pm8001_device *pm8001_dev) +{ + u32 id = pm8001_dev->id; + memset(pm8001_dev, 0, sizeof(*pm8001_dev)); + pm8001_dev->id = id; + pm8001_dev->dev_type = NO_DEVICE; + pm8001_dev->device_id = PM8001_MAX_DEVICES; + pm8001_dev->sas_device = NULL; +} + +/** + * pm8001_dev_found_notify - libsas notify a device is found. + * @dev: the device structure which sas layer used. + * + * when libsas find a sas domain device, it should tell the LLDD that + * device is found, and then LLDD register this device to HBA firmware + * by the command "OPC_INB_REG_DEV", after that the HBA will assign a + * device ID(according to device's sas address) and returned it to LLDD. From + * now on, we communicate with HBA FW with the device ID which HBA assigned + * rather than sas address. it is the neccessary step for our HBA but it is + * the optional for other HBA driver. + */ +static int pm8001_dev_found_notify(struct domain_device *dev) +{ + unsigned long flags = 0; + int res = 0; + struct pm8001_hba_info *pm8001_ha = NULL; + struct domain_device *parent_dev = dev->parent; + struct pm8001_device *pm8001_device; + DECLARE_COMPLETION_ONSTACK(completion); + u32 flag = 0; + pm8001_ha = pm8001_find_ha_by_dev(dev); + spin_lock_irqsave(&pm8001_ha->lock, flags); + + pm8001_device = pm8001_alloc_dev(pm8001_ha); + if (!pm8001_device) { + res = -1; + goto found_out; + } + pm8001_device->sas_device = dev; + dev->lldd_dev = pm8001_device; + pm8001_device->dev_type = dev->dev_type; + pm8001_device->dcompletion = &completion; + if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) { + int phy_id; + struct ex_phy *phy; + for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys; + phy_id++) { + phy = &parent_dev->ex_dev.ex_phy[phy_id]; + if (SAS_ADDR(phy->attached_sas_addr) + == SAS_ADDR(dev->sas_addr)) { + pm8001_device->attached_phy = phy_id; + break; + } + } + if (phy_id == parent_dev->ex_dev.num_phys) { + PM8001_FAIL_DBG(pm8001_ha, + pm8001_printk("Error: no attached dev:%016llx" + " at ex:%016llx.\n", SAS_ADDR(dev->sas_addr), + SAS_ADDR(parent_dev->sas_addr))); + res = -1; + } + } else { + if (dev->dev_type == SATA_DEV) { + pm8001_device->attached_phy = + dev->rphy->identify.phy_identifier; + flag = 1; /* directly sata*/ + } + } /*register this device to HBA*/ + PM8001_DISC_DBG(pm8001_ha, pm8001_printk("Found device \n")); + PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag); + spin_unlock_irqrestore(&pm8001_ha->lock, flags); + wait_for_completion(&completion); + if (dev->dev_type == SAS_END_DEV) + msleep(50); + pm8001_ha->flags |= PM8001F_RUN_TIME ; + return 0; +found_out: + spin_unlock_irqrestore(&pm8001_ha->lock, flags); + return res; +} + +int pm8001_dev_found(struct domain_device *dev) +{ + return pm8001_dev_found_notify(dev); +} + +/** + * pm8001_alloc_task - allocate a task structure for TMF + */ +static struct sas_task *pm8001_alloc_task(void) +{ + struct sas_task *task = kzalloc(sizeof(*task), GFP_KERNEL); + if (task) { + INIT_LIST_HEAD(&task->list); + spin_lock_init(&task->task_state_lock); + task->task_state_flags = SAS_TASK_STATE_PENDING; + init_timer(&task->timer); + init_completion(&task->completion); + } + return task; +} + +static void pm8001_free_task(struct sas_task *task) +{ + if (task) { + BUG_ON(!list_empty(&task->list)); + kfree(task); + } +} + +static void pm8001_task_done(struct sas_task *task) +{ + if (!del_timer(&task->timer)) + return; + complete(&task->completion); +} + +static void pm8001_tmf_timedout(unsigned long data) +{ + struct sas_task *task = (struct sas_task *)data; + + task->task_state_flags |= SAS_TASK_STATE_ABORTED; + complete(&task->completion); +} + +#define PM8001_TASK_TIMEOUT 20 +/** + * pm8001_exec_internal_tmf_task - execute some task management commands. + * @dev: the wanted device. + * @tmf: which task management wanted to be take. + * @para_len: para_len. + * @parameter: ssp task parameter. + * + * when errors or exception happened, we may want to do something, for example + * abort the issued task which result in this execption, it is done by calling + * this function, note it is also with the task execute interface. + */ +static int pm8001_exec_internal_tmf_task(struct domain_device *dev, + void *parameter, u32 para_len, struct pm8001_tmf_task *tmf) +{ + int res, retry; + struct sas_task *task = NULL; + struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev); + + for (retry = 0; retry < 3; retry++) { + task = pm8001_alloc_task(); + if (!task) + return -ENOMEM; + + task->dev = dev; + task->task_proto = dev->tproto; + memcpy(&task->ssp_task, parameter, para_len); + task->task_done = pm8001_task_done; + task->timer.data = (unsigned long)task; + task->timer.function = pm8001_tmf_timedout; + task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ; + add_timer(&task->timer); + + res = pm8001_task_exec(task, 1, GFP_KERNEL, 1, tmf); + + if (res) { + del_timer(&task->timer); + PM8001_FAIL_DBG(pm8001_ha, + pm8001_printk("Executing internal task " + "failed\n")); + goto ex_err; + } + wait_for_completion(&task->completion); + res = -TMF_RESP_FUNC_FAILED; + /* Even TMF timed out, return direct. */ + if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { + if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { + PM8001_FAIL_DBG(pm8001_ha, + pm8001_printk("TMF task[%x]timeout.\n", + tmf->tmf)); + goto ex_err; + } + } + + if (task->task_status.resp == SAS_TASK_COMPLETE && + task->task_status.stat == SAM_GOOD) { + res = TMF_RESP_FUNC_COMPLETE; + break; + } + + if (task->task_status.resp == SAS_TASK_COMPLETE && + task->task_status.stat == SAS_DATA_UNDERRUN) { + /* no error, but return the number of bytes of + * underrun */ + res = task->task_status.residual; + break; + } + + if (task->task_status.resp == SAS_TASK_COMPLETE && + task->task_status.stat == SAS_DATA_OVERRUN) { + PM8001_FAIL_DBG(pm8001_ha, + pm8001_printk("Blocked task error.\n")); + res = -EMSGSIZE; + break; + } else { + PM8001_EH_DBG(pm8001_ha, + pm8001_printk(" Task to dev %016llx response:" + "0x%x status 0x%x\n", + SAS_ADDR(dev->sas_addr), + task->task_status.resp, + task->task_status.stat)); + pm8001_free_task(task); + task = NULL; + } + } +ex_err: + BUG_ON(retry == 3 && task != NULL); + if (task != NULL) + pm8001_free_task(task); + return res; +} + +static int +pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha, + struct pm8001_device *pm8001_dev, struct domain_device *dev, u32 flag, + u32 task_tag) +{ + int res, retry; + u32 ccb_tag; + struct pm8001_ccb_info *ccb; + struct sas_task *task = NULL; + + for (retry = 0; retry < 3; retry++) { + task = pm8001_alloc_task(); + if (!task) + return -ENOMEM; + + task->dev = dev; + task->task_proto = dev->tproto; + task->task_done = pm8001_task_done; + task->timer.data = (unsigned long)task; + task->timer.function = pm8001_tmf_timedout; + task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ; + add_timer(&task->timer); + + res = pm8001_tag_alloc(pm8001_ha, &ccb_tag); + if (res) + return res; + ccb = &pm8001_ha->ccb_info[ccb_tag]; + ccb->device = pm8001_dev; + ccb->ccb_tag = ccb_tag; + ccb->task = task; + + res = PM8001_CHIP_DISP->task_abort(pm8001_ha, + pm8001_dev, flag, task_tag, ccb_tag); + + if (res) { + del_timer(&task->timer); + PM8001_FAIL_DBG(pm8001_ha, + pm8001_printk("Executing internal task " + "failed\n")); + goto ex_err; + } + wait_for_completion(&task->completion); + res = TMF_RESP_FUNC_FAILED; + /* Even TMF timed out, return direct. */ + if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { + if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { + PM8001_FAIL_DBG(pm8001_ha, + pm8001_printk("TMF task timeout.\n")); + goto ex_err; + } + } + + if (task->task_status.resp == SAS_TASK_COMPLETE && + task->task_status.stat == SAM_GOOD) { + res = TMF_RESP_FUNC_COMPLETE; + break; + + } else { + PM8001_EH_DBG(pm8001_ha, + pm8001_printk(" Task to dev %016llx response: " + "0x%x status 0x%x\n", + SAS_ADDR(dev->sas_addr), + task->task_status.resp, + task->task_status.stat)); + pm8001_free_task(task); + task = NULL; + } + } +ex_err: + BUG_ON(retry == 3 && task != NULL); + if (task != NULL) + pm8001_free_task(task); + return res; +} + +/** + * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify" + * @dev: the device structure which sas layer used. + */ +static void pm8001_dev_gone_notify(struct domain_device *dev) +{ + unsigned long flags = 0; + u32 tag; + struct pm8001_hba_info *pm8001_ha; + struct pm8001_device *pm8001_dev = dev->lldd_dev; + u32 device_id = pm8001_dev->device_id; + pm8001_ha = pm8001_find_ha_by_dev(dev); + spin_lock_irqsave(&pm8001_ha->lock, flags); + pm8001_tag_alloc(pm8001_ha, &tag); + if (pm8001_dev) { + PM8001_DISC_DBG(pm8001_ha, + pm8001_printk("found dev[%d:%x] is gone.\n", + pm8001_dev->device_id, pm8001_dev->dev_type)); + if (pm8001_dev->running_req) { + spin_unlock_irqrestore(&pm8001_ha->lock, flags); + pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev , + dev, 1, 0); + spin_lock_irqsave(&pm8001_ha->lock, flags); + } + PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id); + pm8001_free_dev(pm8001_dev); + } else { + PM8001_DISC_DBG(pm8001_ha, + pm8001_printk("Found dev has gone.\n")); + } + dev->lldd_dev = NULL; + spin_unlock_irqrestore(&pm8001_ha->lock, flags); +} + +void pm8001_dev_gone(struct domain_device *dev) +{ + pm8001_dev_gone_notify(dev); +} + +static int pm8001_issue_ssp_tmf(struct domain_device *dev, + u8 *lun, struct pm8001_tmf_task *tmf) +{ + struct sas_ssp_task ssp_task; + if (!(dev->tproto & SAS_PROTOCOL_SSP)) + return TMF_RESP_FUNC_ESUPP; + + strncpy((u8 *)&ssp_task.LUN, lun, 8); + return pm8001_exec_internal_tmf_task(dev, &ssp_task, sizeof(ssp_task), + tmf); +} + +/** + * Standard mandates link reset for ATA (type 0) and hard reset for + * SSP (type 1) , only for RECOVERY + */ +int pm8001_I_T_nexus_reset(struct domain_device *dev) +{ + int rc = TMF_RESP_FUNC_FAILED; + struct pm8001_device *pm8001_dev; + struct pm8001_hba_info *pm8001_ha; + struct sas_phy *phy; + if (!dev || !dev->lldd_dev) + return -1; + + pm8001_dev = dev->lldd_dev; + pm8001_ha = pm8001_find_ha_by_dev(dev); + phy = sas_find_local_phy(dev); + + if (dev_is_sata(dev)) { + DECLARE_COMPLETION_ONSTACK(completion_setstate); + if (scsi_is_sas_phy_local(phy)) + return 0; + rc = sas_phy_reset(phy, 1); + msleep(2000); + rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev , + dev, 1, 0); + pm8001_dev->setds_completion = &completion_setstate; + rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha, + pm8001_dev, 0x01); + wait_for_completion(&completion_setstate); + } else{ + rc = sas_phy_reset(phy, 1); + msleep(2000); + } + PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n", + pm8001_dev->device_id, rc)); + return rc; +} + +/* mandatory SAM-3, the task reset the specified LUN*/ +int pm8001_lu_reset(struct domain_device *dev, u8 *lun) +{ + int rc = TMF_RESP_FUNC_FAILED; + struct pm8001_tmf_task tmf_task; + struct pm8001_device *pm8001_dev = dev->lldd_dev; + struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev); + if (dev_is_sata(dev)) { + struct sas_phy *phy = sas_find_local_phy(dev); + rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev , + dev, 1, 0); + rc = sas_phy_reset(phy, 1); + rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha, + pm8001_dev, 0x01); + msleep(2000); + } else { + tmf_task.tmf = TMF_LU_RESET; + rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task); + } + /* If failed, fall-through I_T_Nexus reset */ + PM8001_EH_DBG(pm8001_ha, pm8001_printk("for device[%x]:rc=%d\n", + pm8001_dev->device_id, rc)); + return rc; +} + +/* optional SAM-3 */ +int pm8001_query_task(struct sas_task *task) +{ + u32 tag = 0xdeadbeef; + int i = 0; + struct scsi_lun lun; + struct pm8001_tmf_task tmf_task; + int rc = TMF_RESP_FUNC_FAILED; + if (unlikely(!task || !task->lldd_task || !task->dev)) + return rc; + + if (task->task_proto & SAS_PROTOCOL_SSP) { + struct scsi_cmnd *cmnd = task->uldd_task; + struct domain_device *dev = task->dev; + struct pm8001_hba_info *pm8001_ha = + pm8001_find_ha_by_dev(dev); + + int_to_scsilun(cmnd->device->lun, &lun); + rc = pm8001_find_tag(task, &tag); + if (rc == 0) { + rc = TMF_RESP_FUNC_FAILED; + return rc; + } + PM8001_EH_DBG(pm8001_ha, pm8001_printk("Query:[")); + for (i = 0; i < 16; i++) + printk(KERN_INFO "%02x ", cmnd->cmnd[i]); + printk(KERN_INFO "]\n"); + tmf_task.tmf = TMF_QUERY_TASK; + tmf_task.tag_of_task_to_be_managed = tag; + + rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task); + switch (rc) { + /* The task is still in Lun, release it then */ + case TMF_RESP_FUNC_SUCC: + PM8001_EH_DBG(pm8001_ha, + pm8001_printk("The task is still in Lun \n")); + /* The task is not in Lun or failed, reset the phy */ + case TMF_RESP_FUNC_FAILED: + case TMF_RESP_FUNC_COMPLETE: + PM8001_EH_DBG(pm8001_ha, + pm8001_printk("The task is not in Lun or failed," + " reset the phy \n")); + break; + } + } + pm8001_printk(":rc= %d\n", rc); + return rc; +} + +/* mandatory SAM-3, still need free task/ccb info, abord the specified task */ +int pm8001_abort_task(struct sas_task *task) +{ + unsigned long flags; + u32 tag = 0xdeadbeef; + u32 device_id; + struct domain_device *dev ; + struct pm8001_hba_info *pm8001_ha = NULL; + struct pm8001_ccb_info *ccb; + struct scsi_lun lun; + struct pm8001_device *pm8001_dev; + struct pm8001_tmf_task tmf_task; + int rc = TMF_RESP_FUNC_FAILED; + if (unlikely(!task || !task->lldd_task || !task->dev)) + return rc; + spin_lock_irqsave(&task->task_state_lock, flags); + if (task->task_state_flags & SAS_TASK_STATE_DONE) { + spin_unlock_irqrestore(&task->task_state_lock, flags); + rc = TMF_RESP_FUNC_COMPLETE; + goto out; + } + spin_unlock_irqrestore(&task->task_state_lock, flags); + if (task->task_proto & SAS_PROTOCOL_SSP) { + struct scsi_cmnd *cmnd = task->uldd_task; + dev = task->dev; + ccb = task->lldd_task; + pm8001_dev = dev->lldd_dev; + pm8001_ha = pm8001_find_ha_by_dev(dev); + int_to_scsilun(cmnd->device->lun, &lun); + rc = pm8001_find_tag(task, &tag); + if (rc == 0) { + printk(KERN_INFO "No such tag in %s\n", __func__); + rc = TMF_RESP_FUNC_FAILED; + return rc; + } + device_id = pm8001_dev->device_id; + PM8001_EH_DBG(pm8001_ha, + pm8001_printk("abort io to deviceid= %d\n", device_id)); + tmf_task.tmf = TMF_ABORT_TASK; + tmf_task.tag_of_task_to_be_managed = tag; + rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task); + pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev, + pm8001_dev->sas_device, 0, tag); + } else if (task->task_proto & SAS_PROTOCOL_SATA || + task->task_proto & SAS_PROTOCOL_STP) { + dev = task->dev; + pm8001_dev = dev->lldd_dev; + pm8001_ha = pm8001_find_ha_by_dev(dev); + rc = pm8001_find_tag(task, &tag); + if (rc == 0) { + printk(KERN_INFO "No such tag in %s\n", __func__); + rc = TMF_RESP_FUNC_FAILED; + return rc; + } + rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev, + pm8001_dev->sas_device, 0, tag); + } else if (task->task_proto & SAS_PROTOCOL_SMP) { + /* SMP */ + dev = task->dev; + pm8001_dev = dev->lldd_dev; + pm8001_ha = pm8001_find_ha_by_dev(dev); + rc = pm8001_find_tag(task, &tag); + if (rc == 0) { + printk(KERN_INFO "No such tag in %s\n", __func__); + rc = TMF_RESP_FUNC_FAILED; + return rc; + } + rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev, + pm8001_dev->sas_device, 0, tag); + + } +out: + if (rc != TMF_RESP_FUNC_COMPLETE) + pm8001_printk("rc= %d\n", rc); + return rc; +} + +int pm8001_abort_task_set(struct domain_device *dev, u8 *lun) +{ + int rc = TMF_RESP_FUNC_FAILED; + struct pm8001_tmf_task tmf_task; + + tmf_task.tmf = TMF_ABORT_TASK_SET; + rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task); + return rc; +} + +int pm8001_clear_aca(struct domain_device *dev, u8 *lun) +{ + int rc = TMF_RESP_FUNC_FAILED; + struct pm8001_tmf_task tmf_task; + + tmf_task.tmf = TMF_CLEAR_ACA; + rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task); + + return rc; +} + +int pm8001_clear_task_set(struct domain_device *dev, u8 *lun) +{ + int rc = TMF_RESP_FUNC_FAILED; + struct pm8001_tmf_task tmf_task; + struct pm8001_device *pm8001_dev = dev->lldd_dev; + struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev); + + PM8001_EH_DBG(pm8001_ha, + pm8001_printk("I_T_L_Q clear task set[%x]\n", + pm8001_dev->device_id)); + tmf_task.tmf = TMF_CLEAR_TASK_SET; + rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task); + return rc; +} + |