summaryrefslogtreecommitdiffstats
path: root/drivers/scsi/pm8001/pm8001_sas.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/scsi/pm8001/pm8001_sas.c')
-rw-r--r--drivers/scsi/pm8001/pm8001_sas.c1195
1 files changed, 1195 insertions, 0 deletions
diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c
new file mode 100644
index 0000000000..a5a31dfa45
--- /dev/null
+++ b/drivers/scsi/pm8001/pm8001_sas.c
@@ -0,0 +1,1195 @@
+/*
+ * PMC-Sierra PM8001/8081/8088/8089 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"
+#include "pm80xx_tracepoints.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_free - free the no more needed tag
+ * @pm8001_ha: our hba struct
+ * @tag: the found tag associated with the task
+ */
+void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag)
+{
+ void *bitmap = pm8001_ha->rsvd_tags;
+ unsigned long flags;
+
+ if (tag >= PM8001_RESERVE_SLOT)
+ return;
+
+ spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags);
+ __clear_bit(tag, bitmap);
+ spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
+}
+
+/**
+ * pm8001_tag_alloc - allocate a empty tag for task used.
+ * @pm8001_ha: our hba struct
+ * @tag_out: the found empty tag .
+ */
+int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out)
+{
+ void *bitmap = pm8001_ha->rsvd_tags;
+ unsigned long flags;
+ unsigned int tag;
+
+ spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags);
+ tag = find_first_zero_bit(bitmap, PM8001_RESERVE_SLOT);
+ if (tag >= PM8001_RESERVE_SLOT) {
+ spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
+ return -SAS_QUEUE_FULL;
+ }
+ __set_bit(tag, bitmap);
+ spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
+
+ /* reserved tags are in the lower region of the tagset */
+ *tag_out = tag;
+ return 0;
+}
+
+/**
+ * pm8001_mem_alloc - allocate memory for pm8001.
+ * @pdev: pci device.
+ * @virt_addr: the allocated virtual address
+ * @pphys_addr: DMA address for this device
+ * @pphys_addr_hi: the physical address high byte address.
+ * @pphys_addr_lo: the physical address low byte address.
+ * @mem_size: memory size.
+ * @align: requested byte alignment
+ */
+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 = dma_alloc_coherent(&pdev->dev, mem_size + align,
+ &mem_dma_handle, GFP_KERNEL);
+ if (!mem_virt_alloc)
+ return -ENOMEM;
+ *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;
+ struct pm8001_phy *phy;
+ DECLARE_COMPLETION_ONSTACK(completion);
+ unsigned long flags;
+ pm8001_ha = sas_phy->ha->lldd_ha;
+ phy = &pm8001_ha->phy[phy_id];
+ pm8001_ha->phy[phy_id].enable_completion = &completion;
+
+ if (PM8001_CHIP_DISP->fatal_errors(pm8001_ha)) {
+ /*
+ * If the controller is in fatal error state,
+ * we will not get a response from the controller
+ */
+ pm8001_dbg(pm8001_ha, FAIL,
+ "Phy control failed due to fatal errors\n");
+ return -EFAULT;
+ }
+
+ 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 == PHY_LINK_DISABLE) {
+ 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 == PHY_LINK_DISABLE) {
+ 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 == PHY_LINK_DISABLE) {
+ 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:
+ if (pm8001_ha->chip_id != chip_8001) {
+ if (pm8001_ha->phy[phy_id].phy_state ==
+ PHY_STATE_LINK_UP_SPCV) {
+ sas_phy_disconnected(&phy->sas_phy);
+ sas_notify_phy_event(&phy->sas_phy,
+ PHYE_LOSS_OF_SIGNAL, GFP_KERNEL);
+ phy->phy_attached = 0;
+ }
+ } else {
+ if (pm8001_ha->phy[phy_id].phy_state ==
+ PHY_STATE_LINK_UP_SPC) {
+ sas_phy_disconnected(&phy->sas_phy);
+ sas_notify_phy_event(&phy->sas_phy,
+ PHYE_LOSS_OF_SIGNAL, GFP_KERNEL);
+ phy->phy_attached = 0;
+ }
+ }
+ PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id);
+ break;
+ case PHY_FUNC_GET_EVENTS:
+ spin_lock_irqsave(&pm8001_ha->lock, flags);
+ if (pm8001_ha->chip_id == chip_8001) {
+ if (-1 == pm8001_bar4_shift(pm8001_ha,
+ (phy_id < 4) ? 0x30000 : 0x40000)) {
+ spin_unlock_irqrestore(&pm8001_ha->lock, flags);
+ return -EINVAL;
+ }
+ }
+ {
+ struct sas_phy *phy = sas_phy->phy;
+ u32 __iomem *qp = pm8001_ha->io_mem[2].memvirtaddr
+ + 0x1034 + (0x4000 * (phy_id & 3));
+
+ phy->invalid_dword_count = readl(qp);
+ phy->running_disparity_error_count = readl(&qp[1]);
+ phy->loss_of_dword_sync_count = readl(&qp[3]);
+ phy->phy_reset_problem_count = readl(&qp[4]);
+ }
+ if (pm8001_ha->chip_id == chip_8001)
+ pm8001_bar4_shift(pm8001_ha, 0);
+ spin_unlock_irqrestore(&pm8001_ha->lock, flags);
+ return 0;
+ default:
+ pm8001_dbg(pm8001_ha, DEVIO, "func 0x%x\n", func);
+ 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);
+ DECLARE_COMPLETION_ONSTACK(completion);
+ pm8001_ha = sha->lldd_ha;
+ /* SAS_RE_INITIALIZATION not available in SPCv/ve */
+ if (pm8001_ha->chip_id == chip_8001)
+ PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha);
+ for (i = 0; i < pm8001_ha->chip->n_phy; ++i) {
+ pm8001_ha->phy[i].enable_completion = &completion;
+ PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
+ wait_for_completion(&completion);
+ msleep(300);
+ }
+}
+
+int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time)
+{
+ struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
+
+ /* 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 */
+ sas_drain_work(ha);
+ 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 && ata_is_ncq(qc->tf.protocol)) {
+ *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_internal_abort - the dispatcher function, prepare data
+ * for internal abort task
+ * @pm8001_ha: our hba card information
+ * @ccb: the ccb which attached to sata task
+ */
+static int pm8001_task_prep_internal_abort(struct pm8001_hba_info *pm8001_ha,
+ struct pm8001_ccb_info *ccb)
+{
+ return PM8001_CHIP_DISP->task_abort(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 sas_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;
+}
+
+#define DEV_IS_GONE(pm8001_dev) \
+ ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)))
+
+
+static int pm8001_deliver_command(struct pm8001_hba_info *pm8001_ha,
+ struct pm8001_ccb_info *ccb)
+{
+ struct sas_task *task = ccb->task;
+ enum sas_protocol task_proto = task->task_proto;
+ struct sas_tmf_task *tmf = task->tmf;
+ int is_tmf = !!tmf;
+
+ switch (task_proto) {
+ case SAS_PROTOCOL_SMP:
+ return pm8001_task_prep_smp(pm8001_ha, ccb);
+ case SAS_PROTOCOL_SSP:
+ if (is_tmf)
+ return pm8001_task_prep_ssp_tm(pm8001_ha, ccb, tmf);
+ return pm8001_task_prep_ssp(pm8001_ha, ccb);
+ case SAS_PROTOCOL_SATA:
+ case SAS_PROTOCOL_STP:
+ return pm8001_task_prep_ata(pm8001_ha, ccb);
+ case SAS_PROTOCOL_INTERNAL_ABORT:
+ return pm8001_task_prep_internal_abort(pm8001_ha, ccb);
+ default:
+ dev_err(pm8001_ha->dev, "unknown sas_task proto: 0x%x\n",
+ task_proto);
+ }
+
+ return -EINVAL;
+}
+
+/**
+ * pm8001_queue_command - register for upper layer used, all IO commands sent
+ * to HBA are from this interface.
+ * @task: the task to be execute.
+ * @gfp_flags: gfp_flags
+ */
+int pm8001_queue_command(struct sas_task *task, gfp_t gfp_flags)
+{
+ struct task_status_struct *ts = &task->task_status;
+ enum sas_protocol task_proto = task->task_proto;
+ struct domain_device *dev = task->dev;
+ struct pm8001_device *pm8001_dev = dev->lldd_dev;
+ bool internal_abort = sas_is_internal_abort(task);
+ struct pm8001_hba_info *pm8001_ha;
+ struct pm8001_port *port = NULL;
+ struct pm8001_ccb_info *ccb;
+ unsigned long flags;
+ u32 n_elem = 0;
+ int rc = 0;
+
+ if (!internal_abort && !dev->port) {
+ ts->resp = SAS_TASK_UNDELIVERED;
+ ts->stat = SAS_PHY_DOWN;
+ if (dev->dev_type != SAS_SATA_DEV)
+ task->task_done(task);
+ return 0;
+ }
+
+ pm8001_ha = pm8001_find_ha_by_dev(dev);
+ if (pm8001_ha->controller_fatal_error) {
+ ts->resp = SAS_TASK_UNDELIVERED;
+ task->task_done(task);
+ return 0;
+ }
+
+ pm8001_dbg(pm8001_ha, IO, "pm8001_task_exec device\n");
+
+ spin_lock_irqsave(&pm8001_ha->lock, flags);
+
+ pm8001_dev = dev->lldd_dev;
+ port = &pm8001_ha->port[sas_find_local_port_id(dev)];
+
+ if (!internal_abort &&
+ (DEV_IS_GONE(pm8001_dev) || !port->port_attached)) {
+ ts->resp = SAS_TASK_UNDELIVERED;
+ ts->stat = SAS_PHY_DOWN;
+ if (sas_protocol_ata(task_proto)) {
+ spin_unlock_irqrestore(&pm8001_ha->lock, flags);
+ task->task_done(task);
+ spin_lock_irqsave(&pm8001_ha->lock, flags);
+ } else {
+ task->task_done(task);
+ }
+ rc = -ENODEV;
+ goto err_out;
+ }
+
+ ccb = pm8001_ccb_alloc(pm8001_ha, pm8001_dev, task);
+ if (!ccb) {
+ rc = -SAS_QUEUE_FULL;
+ goto err_out;
+ }
+
+ if (!sas_protocol_ata(task_proto)) {
+ if (task->num_scatter) {
+ n_elem = dma_map_sg(pm8001_ha->dev, task->scatter,
+ task->num_scatter, task->data_dir);
+ if (!n_elem) {
+ rc = -ENOMEM;
+ goto err_out_ccb;
+ }
+ }
+ } else {
+ n_elem = task->num_scatter;
+ }
+
+ task->lldd_task = ccb;
+ ccb->n_elem = n_elem;
+
+ atomic_inc(&pm8001_dev->running_req);
+
+ rc = pm8001_deliver_command(pm8001_ha, ccb);
+ if (rc) {
+ atomic_dec(&pm8001_dev->running_req);
+ if (!sas_protocol_ata(task_proto) && n_elem)
+ dma_unmap_sg(pm8001_ha->dev, task->scatter,
+ task->num_scatter, task->data_dir);
+err_out_ccb:
+ pm8001_ccb_free(pm8001_ha, ccb);
+
+err_out:
+ pm8001_dbg(pm8001_ha, IO, "pm8001_task_exec failed[%d]!\n", rc);
+ }
+
+ spin_unlock_irqrestore(&pm8001_ha->lock, flags);
+
+ return rc;
+}
+
+/**
+ * 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 to free
+ */
+void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
+ struct pm8001_ccb_info *ccb)
+{
+ struct sas_task *task = ccb->task;
+ struct ata_queued_cmd *qc;
+ struct pm8001_device *pm8001_dev;
+
+ if (!task)
+ return;
+
+ if (!sas_protocol_ata(task->task_proto) && 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,
+ DMA_FROM_DEVICE);
+ dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
+ DMA_TO_DEVICE);
+ break;
+
+ case SAS_PROTOCOL_SATA:
+ case SAS_PROTOCOL_STP:
+ case SAS_PROTOCOL_SSP:
+ default:
+ /* do nothing */
+ break;
+ }
+
+ if (sas_protocol_ata(task->task_proto)) {
+ /* For SCSI/ATA commands uldd_task points to ata_queued_cmd */
+ qc = task->uldd_task;
+ pm8001_dev = ccb->device;
+ trace_pm80xx_request_complete(pm8001_ha->id,
+ pm8001_dev ? pm8001_dev->attached_phy : PM8001_MAX_PHYS,
+ ccb->ccb_tag, 0 /* ctlr_opcode not known */,
+ qc ? qc->tf.command : 0, // ata opcode
+ pm8001_dev ? atomic_read(&pm8001_dev->running_req) : -1);
+ }
+
+ task->lldd_task = NULL;
+ pm8001_ccb_free(pm8001_ha, ccb);
+}
+
+/**
+ * pm8001_alloc_dev - find a empty pm8001_device
+ * @pm8001_ha: our hba card information
+ */
+static 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 == SAS_PHY_UNUSED) {
+ pm8001_ha->devices[dev].id = dev;
+ return &pm8001_ha->devices[dev];
+ }
+ }
+ if (dev == PM8001_MAX_DEVICES) {
+ pm8001_dbg(pm8001_ha, FAIL,
+ "max support %d devices, ignore ..\n",
+ PM8001_MAX_DEVICES);
+ }
+ return NULL;
+}
+/**
+ * pm8001_find_dev - find a matching pm8001_device
+ * @pm8001_ha: our hba card information
+ * @device_id: device ID to match against
+ */
+struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,
+ u32 device_id)
+{
+ u32 dev;
+ for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
+ if (pm8001_ha->devices[dev].device_id == device_id)
+ return &pm8001_ha->devices[dev];
+ }
+ if (dev == PM8001_MAX_DEVICES) {
+ pm8001_dbg(pm8001_ha, FAIL, "NO MATCHING DEVICE FOUND !!!\n");
+ }
+ return NULL;
+}
+
+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 = SAS_PHY_UNUSED;
+ 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;
+
+ phy_id = sas_find_attached_phy_id(&parent_dev->ex_dev, dev);
+ if (phy_id < 0) {
+ pm8001_dbg(pm8001_ha, FAIL,
+ "Error: no attached dev:%016llx at ex:%016llx.\n",
+ SAS_ADDR(dev->sas_addr),
+ SAS_ADDR(parent_dev->sas_addr));
+ res = phy_id;
+ } else {
+ pm8001_device->attached_phy = phy_id;
+ }
+ } else {
+ if (dev->dev_type == SAS_SATA_DEV) {
+ pm8001_device->attached_phy =
+ dev->rphy->identify.phy_identifier;
+ flag = 1; /* directly sata */
+ }
+ } /*register this device to HBA*/
+ pm8001_dbg(pm8001_ha, DISC, "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_DEVICE)
+ 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);
+}
+
+#define PM8001_TASK_TIMEOUT 20
+
+/**
+ * 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;
+ 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);
+ if (pm8001_dev) {
+ u32 device_id = pm8001_dev->device_id;
+
+ pm8001_dbg(pm8001_ha, DISC, "found dev[%d:%x] is gone.\n",
+ pm8001_dev->device_id, pm8001_dev->dev_type);
+ if (atomic_read(&pm8001_dev->running_req)) {
+ spin_unlock_irqrestore(&pm8001_ha->lock, flags);
+ sas_execute_internal_abort_dev(dev, 0, NULL);
+ while (atomic_read(&pm8001_dev->running_req))
+ msleep(20);
+ spin_lock_irqsave(&pm8001_ha->lock, flags);
+ }
+ PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
+ pm8001_free_dev(pm8001_dev);
+ } else {
+ pm8001_dbg(pm8001_ha, DISC, "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);
+}
+
+/* retry commands by ha, by task and/or by device */
+void pm8001_open_reject_retry(
+ struct pm8001_hba_info *pm8001_ha,
+ struct sas_task *task_to_close,
+ struct pm8001_device *device_to_close)
+{
+ int i;
+ unsigned long flags;
+
+ if (pm8001_ha == NULL)
+ return;
+
+ spin_lock_irqsave(&pm8001_ha->lock, flags);
+
+ for (i = 0; i < PM8001_MAX_CCB; i++) {
+ struct sas_task *task;
+ struct task_status_struct *ts;
+ struct pm8001_device *pm8001_dev;
+ unsigned long flags1;
+ struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];
+
+ if (ccb->ccb_tag == PM8001_INVALID_TAG)
+ continue;
+
+ pm8001_dev = ccb->device;
+ if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))
+ continue;
+ if (!device_to_close) {
+ uintptr_t d = (uintptr_t)pm8001_dev
+ - (uintptr_t)&pm8001_ha->devices;
+ if (((d % sizeof(*pm8001_dev)) != 0)
+ || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES))
+ continue;
+ } else if (pm8001_dev != device_to_close)
+ continue;
+ task = ccb->task;
+ if (!task || !task->task_done)
+ continue;
+ if (task_to_close && (task != task_to_close))
+ continue;
+ ts = &task->task_status;
+ ts->resp = SAS_TASK_COMPLETE;
+ /* Force the midlayer to retry */
+ ts->stat = SAS_OPEN_REJECT;
+ ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
+ if (pm8001_dev)
+ atomic_dec(&pm8001_dev->running_req);
+ spin_lock_irqsave(&task->task_state_lock, flags1);
+ task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
+ task->task_state_flags |= SAS_TASK_STATE_DONE;
+ if (unlikely((task->task_state_flags
+ & SAS_TASK_STATE_ABORTED))) {
+ spin_unlock_irqrestore(&task->task_state_lock,
+ flags1);
+ pm8001_ccb_task_free(pm8001_ha, ccb);
+ } else {
+ spin_unlock_irqrestore(&task->task_state_lock,
+ flags1);
+ pm8001_ccb_task_free(pm8001_ha, ccb);
+ mb();/* in order to force CPU ordering */
+ spin_unlock_irqrestore(&pm8001_ha->lock, flags);
+ task->task_done(task);
+ spin_lock_irqsave(&pm8001_ha->lock, flags);
+ }
+ }
+
+ spin_unlock_irqrestore(&pm8001_ha->lock, flags);
+}
+
+/**
+ * pm8001_I_T_nexus_reset() - reset the initiator/target connection
+ * @dev: the device structure for the device to reset.
+ *
+ * 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 -ENODEV;
+
+ pm8001_dev = dev->lldd_dev;
+ pm8001_ha = pm8001_find_ha_by_dev(dev);
+ phy = sas_get_local_phy(dev);
+
+ if (dev_is_sata(dev)) {
+ if (scsi_is_sas_phy_local(phy)) {
+ rc = 0;
+ goto out;
+ }
+ rc = sas_phy_reset(phy, 1);
+ if (rc) {
+ pm8001_dbg(pm8001_ha, EH,
+ "phy reset failed for device %x\n"
+ "with rc %d\n", pm8001_dev->device_id, rc);
+ rc = TMF_RESP_FUNC_FAILED;
+ goto out;
+ }
+ msleep(2000);
+ rc = sas_execute_internal_abort_dev(dev, 0, NULL);
+ if (rc) {
+ pm8001_dbg(pm8001_ha, EH, "task abort failed %x\n"
+ "with rc %d\n", pm8001_dev->device_id, rc);
+ rc = TMF_RESP_FUNC_FAILED;
+ }
+ } else {
+ rc = sas_phy_reset(phy, 1);
+ msleep(2000);
+ }
+ pm8001_dbg(pm8001_ha, EH, " for device[%x]:rc=%d\n",
+ pm8001_dev->device_id, rc);
+ out:
+ sas_put_local_phy(phy);
+ return rc;
+}
+
+/*
+* This function handle the IT_NEXUS_XXX event or completion
+* status code for SSP/SATA/SMP I/O request.
+*/
+int pm8001_I_T_nexus_event_handler(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);
+
+ pm8001_dbg(pm8001_ha, EH, "I_T_Nexus handler invoked !!\n");
+
+ phy = sas_get_local_phy(dev);
+
+ if (dev_is_sata(dev)) {
+ DECLARE_COMPLETION_ONSTACK(completion_setstate);
+ if (scsi_is_sas_phy_local(phy)) {
+ rc = 0;
+ goto out;
+ }
+ /* send internal ssp/sata/smp abort command to FW */
+ sas_execute_internal_abort_dev(dev, 0, NULL);
+ msleep(100);
+
+ /* deregister the target device */
+ pm8001_dev_gone_notify(dev);
+ msleep(200);
+
+ /*send phy reset to hard reset target */
+ rc = sas_phy_reset(phy, 1);
+ msleep(2000);
+ pm8001_dev->setds_completion = &completion_setstate;
+
+ wait_for_completion(&completion_setstate);
+ } else {
+ /* send internal ssp/sata/smp abort command to FW */
+ sas_execute_internal_abort_dev(dev, 0, NULL);
+ msleep(100);
+
+ /* deregister the target device */
+ pm8001_dev_gone_notify(dev);
+ msleep(200);
+
+ /*send phy reset to hard reset target */
+ rc = sas_phy_reset(phy, 1);
+ msleep(2000);
+ }
+ pm8001_dbg(pm8001_ha, EH, " for device[%x]:rc=%d\n",
+ pm8001_dev->device_id, rc);
+out:
+ sas_put_local_phy(phy);
+
+ 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_device *pm8001_dev = dev->lldd_dev;
+ struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
+ DECLARE_COMPLETION_ONSTACK(completion_setstate);
+
+ if (PM8001_CHIP_DISP->fatal_errors(pm8001_ha)) {
+ /*
+ * If the controller is in fatal error state,
+ * we will not get a response from the controller
+ */
+ pm8001_dbg(pm8001_ha, FAIL,
+ "LUN reset failed due to fatal errors\n");
+ return rc;
+ }
+
+ if (dev_is_sata(dev)) {
+ struct sas_phy *phy = sas_get_local_phy(dev);
+ sas_execute_internal_abort_dev(dev, 0, NULL);
+ rc = sas_phy_reset(phy, 1);
+ sas_put_local_phy(phy);
+ pm8001_dev->setds_completion = &completion_setstate;
+ rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
+ pm8001_dev, DS_OPERATIONAL);
+ wait_for_completion(&completion_setstate);
+ } else {
+ rc = sas_lu_reset(dev, lun);
+ }
+ /* If failed, fall-through I_T_Nexus reset */
+ pm8001_dbg(pm8001_ha, EH, "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 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);
+
+ rc = pm8001_find_tag(task, &tag);
+ if (rc == 0) {
+ rc = TMF_RESP_FUNC_FAILED;
+ return rc;
+ }
+ pm8001_dbg(pm8001_ha, EH, "Query:[%16ph]\n", cmnd->cmnd);
+
+ rc = sas_query_task(task, tag);
+ switch (rc) {
+ /* The task is still in Lun, release it then */
+ case TMF_RESP_FUNC_SUCC:
+ pm8001_dbg(pm8001_ha, EH,
+ "The task is still in Lun\n");
+ break;
+ /* The task is not in Lun or failed, reset the phy */
+ case TMF_RESP_FUNC_FAILED:
+ case TMF_RESP_FUNC_COMPLETE:
+ pm8001_dbg(pm8001_ha, EH,
+ "The task is not in Lun or failed, reset the phy\n");
+ break;
+ }
+ }
+ pr_err("pm80xx: rc= %d\n", rc);
+ return rc;
+}
+
+/* mandatory SAM-3, still need free task/ccb info, abort the specified task */
+int pm8001_abort_task(struct sas_task *task)
+{
+ struct pm8001_ccb_info *ccb = task->lldd_task;
+ unsigned long flags;
+ u32 tag;
+ struct domain_device *dev ;
+ struct pm8001_hba_info *pm8001_ha;
+ struct pm8001_device *pm8001_dev;
+ int rc = TMF_RESP_FUNC_FAILED, ret;
+ u32 phy_id, port_id;
+ struct sas_task_slow slow_task;
+
+ if (!task->lldd_task || !task->dev)
+ return TMF_RESP_FUNC_FAILED;
+
+ dev = task->dev;
+ pm8001_dev = dev->lldd_dev;
+ pm8001_ha = pm8001_find_ha_by_dev(dev);
+ phy_id = pm8001_dev->attached_phy;
+
+ if (PM8001_CHIP_DISP->fatal_errors(pm8001_ha)) {
+ // If the controller is seeing fatal errors
+ // abort task will not get a response from the controller
+ return TMF_RESP_FUNC_FAILED;
+ }
+
+ ret = pm8001_find_tag(task, &tag);
+ if (ret == 0) {
+ pm8001_info(pm8001_ha, "no tag for task:%p\n", task);
+ return TMF_RESP_FUNC_FAILED;
+ }
+ 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);
+ return TMF_RESP_FUNC_COMPLETE;
+ }
+ task->task_state_flags |= SAS_TASK_STATE_ABORTED;
+ if (task->slow_task == NULL) {
+ init_completion(&slow_task.completion);
+ task->slow_task = &slow_task;
+ }
+ spin_unlock_irqrestore(&task->task_state_lock, flags);
+ if (task->task_proto & SAS_PROTOCOL_SSP) {
+ rc = sas_abort_task(task, tag);
+ sas_execute_internal_abort_single(dev, tag, 0, NULL);
+ } else if (task->task_proto & SAS_PROTOCOL_SATA ||
+ task->task_proto & SAS_PROTOCOL_STP) {
+ if (pm8001_ha->chip_id == chip_8006) {
+ DECLARE_COMPLETION_ONSTACK(completion_reset);
+ DECLARE_COMPLETION_ONSTACK(completion);
+ struct pm8001_phy *phy = pm8001_ha->phy + phy_id;
+ port_id = phy->port->port_id;
+
+ /* 1. Set Device state as Recovery */
+ pm8001_dev->setds_completion = &completion;
+ PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
+ pm8001_dev, DS_IN_RECOVERY);
+ wait_for_completion(&completion);
+
+ /* 2. Send Phy Control Hard Reset */
+ reinit_completion(&completion);
+ phy->port_reset_status = PORT_RESET_TMO;
+ phy->reset_success = false;
+ phy->enable_completion = &completion;
+ phy->reset_completion = &completion_reset;
+ ret = PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
+ PHY_HARD_RESET);
+ if (ret) {
+ phy->enable_completion = NULL;
+ phy->reset_completion = NULL;
+ goto out;
+ }
+
+ /* In the case of the reset timeout/fail we still
+ * abort the command at the firmware. The assumption
+ * here is that the drive is off doing something so
+ * that it's not processing requests, and we want to
+ * avoid getting a completion for this and either
+ * leaking the task in libsas or losing the race and
+ * getting a double free.
+ */
+ pm8001_dbg(pm8001_ha, MSG,
+ "Waiting for local phy ctl\n");
+ ret = wait_for_completion_timeout(&completion,
+ PM8001_TASK_TIMEOUT * HZ);
+ if (!ret || !phy->reset_success) {
+ phy->enable_completion = NULL;
+ phy->reset_completion = NULL;
+ } else {
+ /* 3. Wait for Port Reset complete or
+ * Port reset TMO
+ */
+ pm8001_dbg(pm8001_ha, MSG,
+ "Waiting for Port reset\n");
+ ret = wait_for_completion_timeout(
+ &completion_reset,
+ PM8001_TASK_TIMEOUT * HZ);
+ if (!ret)
+ phy->reset_completion = NULL;
+ WARN_ON(phy->port_reset_status ==
+ PORT_RESET_TMO);
+ if (phy->port_reset_status == PORT_RESET_TMO) {
+ pm8001_dev_gone_notify(dev);
+ PM8001_CHIP_DISP->hw_event_ack_req(
+ pm8001_ha, 0,
+ 0x07, /*HW_EVENT_PHY_DOWN ack*/
+ port_id, phy_id, 0, 0);
+ goto out;
+ }
+ }
+
+ /*
+ * 4. SATA Abort ALL
+ * we wait for the task to be aborted so that the task
+ * is removed from the ccb. on success the caller is
+ * going to free the task.
+ */
+ ret = sas_execute_internal_abort_dev(dev, 0, NULL);
+ if (ret)
+ goto out;
+ ret = wait_for_completion_timeout(
+ &task->slow_task->completion,
+ PM8001_TASK_TIMEOUT * HZ);
+ if (!ret)
+ goto out;
+
+ /* 5. Set Device State as Operational */
+ reinit_completion(&completion);
+ pm8001_dev->setds_completion = &completion;
+ PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
+ pm8001_dev, DS_OPERATIONAL);
+ wait_for_completion(&completion);
+ } else {
+ /*
+ * Ensure that if we see a completion for the ccb
+ * associated with the task which we are trying to
+ * abort then we should not touch the sas_task as it
+ * may race with libsas freeing it when return here.
+ */
+ ccb->task = NULL;
+ ret = sas_execute_internal_abort_single(dev, tag, 0, NULL);
+ }
+ rc = TMF_RESP_FUNC_COMPLETE;
+ } else if (task->task_proto & SAS_PROTOCOL_SMP) {
+ /* SMP */
+ rc = sas_execute_internal_abort_single(dev, tag, 0, NULL);
+
+ }
+out:
+ spin_lock_irqsave(&task->task_state_lock, flags);
+ if (task->slow_task == &slow_task)
+ task->slow_task = NULL;
+ spin_unlock_irqrestore(&task->task_state_lock, flags);
+ if (rc != TMF_RESP_FUNC_COMPLETE)
+ pm8001_info(pm8001_ha, "rc= %d\n", rc);
+ return rc;
+}
+
+int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
+{
+ struct pm8001_device *pm8001_dev = dev->lldd_dev;
+ struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
+
+ pm8001_dbg(pm8001_ha, EH, "I_T_L_Q clear task set[%x]\n",
+ pm8001_dev->device_id);
+ return sas_clear_task_set(dev, lun);
+}
+
+void pm8001_port_formed(struct asd_sas_phy *sas_phy)
+{
+ struct sas_ha_struct *sas_ha = sas_phy->ha;
+ struct pm8001_hba_info *pm8001_ha = sas_ha->lldd_ha;
+ struct pm8001_phy *phy = sas_phy->lldd_phy;
+ struct asd_sas_port *sas_port = sas_phy->port;
+ struct pm8001_port *port = phy->port;
+
+ if (!sas_port) {
+ pm8001_dbg(pm8001_ha, FAIL, "Received null port\n");
+ return;
+ }
+ sas_port->lldd_port = port;
+}
+
+void pm8001_setds_completion(struct domain_device *dev)
+{
+ struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
+ struct pm8001_device *pm8001_dev = dev->lldd_dev;
+ DECLARE_COMPLETION_ONSTACK(completion_setstate);
+
+ if (pm8001_ha->chip_id != chip_8001) {
+ pm8001_dev->setds_completion = &completion_setstate;
+ PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
+ pm8001_dev, DS_OPERATIONAL);
+ wait_for_completion(&completion_setstate);
+ }
+}
+
+void pm8001_tmf_aborted(struct sas_task *task)
+{
+ struct pm8001_ccb_info *ccb = task->lldd_task;
+
+ if (ccb)
+ ccb->task = NULL;
+}