| /* |
| * 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 <linux/slab.h> |
| #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; |
| } |
| |
| /** |
| * 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); |
| } |
| |
| /* 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 necessary 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); |
| } |
| |
| 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 = sas_alloc_task(GFP_KERNEL); |
| 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_STAT_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)); |
| sas_free_task(task); |
| task = NULL; |
| } |
| } |
| ex_err: |
| BUG_ON(retry == 3 && task != NULL); |
| sas_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 = sas_alloc_task(GFP_KERNEL); |
| 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_STAT_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)); |
| sas_free_task(task); |
| task = NULL; |
| } |
| } |
| ex_err: |
| BUG_ON(retry == 3 && task != NULL); |
| sas_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; |
| |
| pm8001_ha = pm8001_find_ha_by_dev(dev); |
| spin_lock_irqsave(&pm8001_ha->lock, flags); |
| pm8001_tag_alloc(pm8001_ha, &tag); |
| if (pm8001_dev) { |
| u32 device_id = pm8001_dev->device_id; |
| |
| 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; |
| } |
| |