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linuxdebug/drivers/scsi/pm8001/pm8001_sas.c

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null pointer error
2024-07-16 15:50:57 +02:00
/*
* 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->tags;
unsigned long flags;
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->tags;
unsigned long flags;
unsigned int tag;
spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags);
tag = find_first_zero_bit(bitmap, pm8001_ha->tags_num);
if (tag >= pm8001_ha->tags_num) {
spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
return -SAS_QUEUE_FULL;
}
__set_bit(tag, bitmap);
spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
*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_free(pm8001_ha, i);
}
/**
* 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;
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;
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_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 = -1;
}
} 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);
}
void pm8001_task_done(struct sas_task *task)
{
del_timer(&task->slow_task->timer);
complete(&task->slow_task->completion);
}
#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 (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)
{
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 (unlikely(!task || !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 {
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;
}