[SCSI] pm8001: add SAS/SATA HBA driver
This driver supports PMC-Sierra PCIe SAS/SATA 8x6G SPC 8001 chip based
host adapters.
Signed-off-by: Jack Wang <jack_wang@usish.com>
Signed-off-by: Lindar Liu <lindar_liu@usish.com>
Signed-off-by: Tom Peng <tom_peng@usish.com>
Signed-off-by: Kevin Ao <aoqingyun@usish.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c
new file mode 100644
index 0000000..7bf30fa
--- /dev/null
+++ b/drivers/scsi/pm8001/pm8001_sas.c
@@ -0,0 +1,1104 @@
+/*
+ * 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;
+ 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;
+}
+/**
+ * pm8001_task_exec -execute the task which come from upper level, send the
+ * command or data to DMA area and then increase CI,for queuecommand(ssp),
+ * it is from upper layer and for smp command,it is from libsas,
+ * for ata command it is from libata.
+ * @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 sas_task *t = task;
+ struct pm8001_ccb_info *ccb;
+ u32 tag = 0xdeadbeef, rc, n_elem = 0;
+ u32 n = num;
+ unsigned long flags = 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;
+ }
+ 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;
+ }
+ }
+ } else {
+ n_elem = t->num_scatter;
+ }
+
+ t->lldd_task = NULL;
+ 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;
+ }
+ t->lldd_task = ccb;
+ /* 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 the empty pm8001_device structure, allocate and
+ * return it for use.
+ * @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 - when libsas find a sas domain device, it should
+ * tell the LLDD that device is found, and then LLDD register this device to
+ * HBA FW 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.
+ * @dev: the device structure which sas layer used.
+ */
+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);
+ pm8001_device->sas_device = dev;
+ if (!pm8001_device) {
+ res = -1;
+ goto found_out;
+ }
+ 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 - when errors or exception happened, we may
+ * want to do something, for example abort issued task which result in this
+ * execption, this is by calling this function, note it is also with the task
+ * execute interface.
+ * @dev: the wanted device.
+ * @tmf: which task management wanted to be take.
+ * @para_len: para_len.
+ * @parameter: ssp task parameter.
+ */
+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_IO_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 rc, 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);
+
+ rc = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
+ if (rc)
+ return rc;
+ 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_IO_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);
+ 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 device_id = %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);
+ rc = 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;
+}
+