#include <linux/kernel.h>
#include <linux/bsg-lib.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_transport_sas.h>
#include <linux/unaligned.h>
#include "smartpqi.h"
static struct pqi_sas_phy *pqi_alloc_sas_phy(struct pqi_sas_port *pqi_sas_port)
{
struct pqi_sas_phy *pqi_sas_phy;
struct sas_phy *phy;
pqi_sas_phy = kzalloc_obj(*pqi_sas_phy);
if (!pqi_sas_phy)
return NULL;
phy = sas_phy_alloc(pqi_sas_port->parent_node->parent_dev,
pqi_sas_port->next_phy_index);
if (!phy) {
kfree(pqi_sas_phy);
return NULL;
}
pqi_sas_port->next_phy_index++;
pqi_sas_phy->phy = phy;
pqi_sas_phy->parent_port = pqi_sas_port;
return pqi_sas_phy;
}
static void pqi_free_sas_phy(struct pqi_sas_phy *pqi_sas_phy)
{
struct sas_phy *phy = pqi_sas_phy->phy;
sas_port_delete_phy(pqi_sas_phy->parent_port->port, phy);
if (pqi_sas_phy->added_to_port)
list_del(&pqi_sas_phy->phy_list_entry);
sas_phy_delete(phy);
kfree(pqi_sas_phy);
}
static int pqi_sas_port_add_phy(struct pqi_sas_phy *pqi_sas_phy)
{
int rc;
struct pqi_sas_port *pqi_sas_port;
struct sas_phy *phy;
struct sas_identify *identify;
pqi_sas_port = pqi_sas_phy->parent_port;
phy = pqi_sas_phy->phy;
identify = &phy->identify;
memset(identify, 0, sizeof(*identify));
identify->sas_address = pqi_sas_port->sas_address;
identify->device_type = SAS_END_DEVICE;
identify->initiator_port_protocols = SAS_PROTOCOL_ALL;
identify->target_port_protocols = SAS_PROTOCOL_ALL;
phy->minimum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
phy->maximum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
phy->minimum_linkrate = SAS_LINK_RATE_UNKNOWN;
phy->maximum_linkrate = SAS_LINK_RATE_UNKNOWN;
phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
rc = sas_phy_add(pqi_sas_phy->phy);
if (rc)
return rc;
sas_port_add_phy(pqi_sas_port->port, pqi_sas_phy->phy);
list_add_tail(&pqi_sas_phy->phy_list_entry,
&pqi_sas_port->phy_list_head);
pqi_sas_phy->added_to_port = true;
return 0;
}
static int pqi_sas_port_add_rphy(struct pqi_sas_port *pqi_sas_port,
struct sas_rphy *rphy)
{
struct sas_identify *identify;
identify = &rphy->identify;
identify->sas_address = pqi_sas_port->sas_address;
identify->phy_identifier = pqi_sas_port->device->phy_id;
identify->initiator_port_protocols = SAS_PROTOCOL_ALL;
identify->target_port_protocols = SAS_PROTOCOL_STP;
switch (pqi_sas_port->device->device_type) {
case SA_DEVICE_TYPE_SAS:
case SA_DEVICE_TYPE_SES:
case SA_DEVICE_TYPE_NVME:
identify->target_port_protocols = SAS_PROTOCOL_SSP;
break;
case SA_DEVICE_TYPE_EXPANDER_SMP:
identify->target_port_protocols = SAS_PROTOCOL_SMP;
break;
case SA_DEVICE_TYPE_SATA:
default:
break;
}
return sas_rphy_add(rphy);
}
static struct sas_rphy *pqi_sas_rphy_alloc(struct pqi_sas_port *pqi_sas_port)
{
if (pqi_sas_port->device && pqi_sas_port->device->is_expander_smp_device)
return sas_expander_alloc(pqi_sas_port->port,
SAS_FANOUT_EXPANDER_DEVICE);
return sas_end_device_alloc(pqi_sas_port->port);
}
static struct pqi_sas_port *pqi_alloc_sas_port(
struct pqi_sas_node *pqi_sas_node, u64 sas_address,
struct pqi_scsi_dev *device)
{
int rc;
struct pqi_sas_port *pqi_sas_port;
struct sas_port *port;
pqi_sas_port = kzalloc_obj(*pqi_sas_port);
if (!pqi_sas_port)
return NULL;
INIT_LIST_HEAD(&pqi_sas_port->phy_list_head);
pqi_sas_port->parent_node = pqi_sas_node;
port = sas_port_alloc_num(pqi_sas_node->parent_dev);
if (!port)
goto free_pqi_port;
rc = sas_port_add(port);
if (rc)
goto free_sas_port;
pqi_sas_port->port = port;
pqi_sas_port->sas_address = sas_address;
pqi_sas_port->device = device;
list_add_tail(&pqi_sas_port->port_list_entry,
&pqi_sas_node->port_list_head);
return pqi_sas_port;
free_sas_port:
sas_port_free(port);
free_pqi_port:
kfree(pqi_sas_port);
return NULL;
}
static void pqi_free_sas_port(struct pqi_sas_port *pqi_sas_port)
{
struct pqi_sas_phy *pqi_sas_phy;
struct pqi_sas_phy *next;
list_for_each_entry_safe(pqi_sas_phy, next,
&pqi_sas_port->phy_list_head, phy_list_entry)
pqi_free_sas_phy(pqi_sas_phy);
sas_port_delete(pqi_sas_port->port);
list_del(&pqi_sas_port->port_list_entry);
kfree(pqi_sas_port);
}
static struct pqi_sas_node *pqi_alloc_sas_node(struct device *parent_dev)
{
struct pqi_sas_node *pqi_sas_node;
pqi_sas_node = kzalloc_obj(*pqi_sas_node);
if (pqi_sas_node) {
pqi_sas_node->parent_dev = parent_dev;
INIT_LIST_HEAD(&pqi_sas_node->port_list_head);
}
return pqi_sas_node;
}
static void pqi_free_sas_node(struct pqi_sas_node *pqi_sas_node)
{
struct pqi_sas_port *pqi_sas_port;
struct pqi_sas_port *next;
if (!pqi_sas_node)
return;
list_for_each_entry_safe(pqi_sas_port, next,
&pqi_sas_node->port_list_head, port_list_entry)
pqi_free_sas_port(pqi_sas_port);
kfree(pqi_sas_node);
}
struct pqi_scsi_dev *pqi_find_device_by_sas_rphy(
struct pqi_ctrl_info *ctrl_info, struct sas_rphy *rphy)
{
struct pqi_scsi_dev *device;
list_for_each_entry(device, &ctrl_info->scsi_device_list,
scsi_device_list_entry) {
if (!device->sas_port)
continue;
if (device->sas_port->rphy == rphy)
return device;
}
return NULL;
}
int pqi_add_sas_host(struct Scsi_Host *shost, struct pqi_ctrl_info *ctrl_info)
{
int rc;
struct device *parent_dev;
struct pqi_sas_node *pqi_sas_node;
struct pqi_sas_port *pqi_sas_port;
struct pqi_sas_phy *pqi_sas_phy;
parent_dev = &shost->shost_dev;
pqi_sas_node = pqi_alloc_sas_node(parent_dev);
if (!pqi_sas_node)
return -ENOMEM;
pqi_sas_port = pqi_alloc_sas_port(pqi_sas_node,
ctrl_info->sas_address, NULL);
if (!pqi_sas_port) {
rc = -ENODEV;
goto free_sas_node;
}
pqi_sas_phy = pqi_alloc_sas_phy(pqi_sas_port);
if (!pqi_sas_phy) {
rc = -ENODEV;
goto free_sas_port;
}
rc = pqi_sas_port_add_phy(pqi_sas_phy);
if (rc)
goto free_sas_phy;
ctrl_info->sas_host = pqi_sas_node;
return 0;
free_sas_phy:
pqi_free_sas_phy(pqi_sas_phy);
free_sas_port:
pqi_free_sas_port(pqi_sas_port);
free_sas_node:
pqi_free_sas_node(pqi_sas_node);
return rc;
}
void pqi_delete_sas_host(struct pqi_ctrl_info *ctrl_info)
{
pqi_free_sas_node(ctrl_info->sas_host);
}
int pqi_add_sas_device(struct pqi_sas_node *pqi_sas_node,
struct pqi_scsi_dev *device)
{
int rc;
struct pqi_sas_port *pqi_sas_port;
struct sas_rphy *rphy;
pqi_sas_port = pqi_alloc_sas_port(pqi_sas_node,
device->sas_address, device);
if (!pqi_sas_port)
return -ENOMEM;
rphy = pqi_sas_rphy_alloc(pqi_sas_port);
if (!rphy) {
rc = -ENODEV;
goto free_sas_port;
}
pqi_sas_port->rphy = rphy;
device->sas_port = pqi_sas_port;
rc = pqi_sas_port_add_rphy(pqi_sas_port, rphy);
if (rc)
goto free_sas_rphy;
return 0;
free_sas_rphy:
sas_rphy_free(rphy);
free_sas_port:
pqi_free_sas_port(pqi_sas_port);
device->sas_port = NULL;
return rc;
}
void pqi_remove_sas_device(struct pqi_scsi_dev *device)
{
if (device->sas_port) {
pqi_free_sas_port(device->sas_port);
device->sas_port = NULL;
}
}
static int pqi_sas_get_linkerrors(struct sas_phy *phy)
{
return 0;
}
static int pqi_sas_get_enclosure_identifier(struct sas_rphy *rphy,
u64 *identifier)
{
int rc;
unsigned long flags;
struct Scsi_Host *shost;
struct pqi_ctrl_info *ctrl_info;
struct pqi_scsi_dev *found_device;
struct pqi_scsi_dev *device;
if (!rphy)
return -ENODEV;
shost = rphy_to_shost(rphy);
ctrl_info = shost_to_hba(shost);
spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
found_device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
if (!found_device) {
rc = -ENODEV;
goto out;
}
if (found_device->devtype == TYPE_ENCLOSURE) {
*identifier = get_unaligned_be64(&found_device->wwid[8]);
rc = 0;
goto out;
}
if (found_device->box_index == 0xff ||
found_device->phys_box_on_bus == 0 ||
found_device->bay == 0xff) {
rc = -EINVAL;
goto out;
}
list_for_each_entry(device, &ctrl_info->scsi_device_list,
scsi_device_list_entry) {
if (device->devtype == TYPE_ENCLOSURE &&
device->box_index == found_device->box_index &&
device->phys_box_on_bus ==
found_device->phys_box_on_bus &&
memcmp(device->phys_connector,
found_device->phys_connector, 2) == 0) {
*identifier =
get_unaligned_be64(&device->wwid[8]);
rc = 0;
goto out;
}
}
if (found_device->phy_connected_dev_type != SA_DEVICE_TYPE_CONTROLLER) {
rc = -EINVAL;
goto out;
}
list_for_each_entry(device, &ctrl_info->scsi_device_list,
scsi_device_list_entry) {
if (device->devtype == TYPE_ENCLOSURE &&
CISS_GET_DRIVE_NUMBER(device->scsi3addr) ==
PQI_VSEP_CISS_BTL) {
*identifier = get_unaligned_be64(&device->wwid[8]);
rc = 0;
goto out;
}
}
rc = -EINVAL;
out:
spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
return rc;
}
static int pqi_sas_get_bay_identifier(struct sas_rphy *rphy)
{
int rc;
unsigned long flags;
struct pqi_ctrl_info *ctrl_info;
struct pqi_scsi_dev *device;
struct Scsi_Host *shost;
if (!rphy)
return -ENODEV;
shost = rphy_to_shost(rphy);
ctrl_info = shost_to_hba(shost);
spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
if (!device) {
rc = -ENODEV;
goto out;
}
if (device->bay == 0xff)
rc = -EINVAL;
else
rc = device->bay;
out:
spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
return rc;
}
static int pqi_sas_phy_reset(struct sas_phy *phy, int hard_reset)
{
return 0;
}
static int pqi_sas_phy_enable(struct sas_phy *phy, int enable)
{
return 0;
}
static int pqi_sas_phy_setup(struct sas_phy *phy)
{
return 0;
}
static void pqi_sas_phy_release(struct sas_phy *phy)
{
}
static int pqi_sas_phy_speed(struct sas_phy *phy,
struct sas_phy_linkrates *rates)
{
return -EINVAL;
}
#define CSMI_IOCTL_TIMEOUT 60
#define SMP_CRC_FIELD_LENGTH 4
static struct bmic_csmi_smp_passthru_buffer *
pqi_build_csmi_smp_passthru_buffer(struct sas_rphy *rphy,
struct bsg_job *job)
{
struct bmic_csmi_smp_passthru_buffer *smp_buf;
struct bmic_csmi_ioctl_header *ioctl_header;
struct bmic_csmi_smp_passthru *parameters;
u32 req_size;
u32 resp_size;
smp_buf = kzalloc_obj(*smp_buf);
if (!smp_buf)
return NULL;
req_size = job->request_payload.payload_len;
resp_size = job->reply_payload.payload_len;
ioctl_header = &smp_buf->ioctl_header;
put_unaligned_le32(sizeof(smp_buf->ioctl_header),
&ioctl_header->header_length);
put_unaligned_le32(CSMI_IOCTL_TIMEOUT, &ioctl_header->timeout);
put_unaligned_le32(CSMI_CC_SAS_SMP_PASSTHRU,
&ioctl_header->control_code);
put_unaligned_le32(sizeof(smp_buf->parameters), &ioctl_header->length);
parameters = &smp_buf->parameters;
parameters->phy_identifier = rphy->identify.phy_identifier;
parameters->port_identifier = 0;
parameters->connection_rate = 0;
put_unaligned_be64(rphy->identify.sas_address,
¶meters->destination_sas_address);
if (req_size > SMP_CRC_FIELD_LENGTH)
req_size -= SMP_CRC_FIELD_LENGTH;
put_unaligned_le32(req_size, ¶meters->request_length);
put_unaligned_le32(resp_size, ¶meters->response_length);
sg_copy_to_buffer(job->request_payload.sg_list,
job->reply_payload.sg_cnt, ¶meters->request,
req_size);
return smp_buf;
}
static unsigned int pqi_build_sas_smp_handler_reply(
struct bmic_csmi_smp_passthru_buffer *smp_buf, struct bsg_job *job,
struct pqi_raid_error_info *error_info)
{
sg_copy_from_buffer(job->reply_payload.sg_list,
job->reply_payload.sg_cnt, &smp_buf->parameters.response,
le32_to_cpu(smp_buf->parameters.response_length));
job->reply_len = le16_to_cpu(error_info->sense_data_length);
memcpy(job->reply, error_info->data,
le16_to_cpu(error_info->sense_data_length));
return job->reply_payload.payload_len -
get_unaligned_le32(&error_info->data_in_transferred);
}
void pqi_sas_smp_handler(struct bsg_job *job, struct Scsi_Host *shost,
struct sas_rphy *rphy)
{
int rc;
struct pqi_ctrl_info *ctrl_info;
struct bmic_csmi_smp_passthru_buffer *smp_buf;
struct pqi_raid_error_info error_info;
unsigned int reslen = 0;
ctrl_info = shost_to_hba(shost);
if (job->reply_payload.payload_len == 0) {
rc = -ENOMEM;
goto out;
}
if (!rphy) {
rc = -EINVAL;
goto out;
}
if (rphy->identify.device_type != SAS_FANOUT_EXPANDER_DEVICE) {
rc = -EINVAL;
goto out;
}
if (job->request_payload.sg_cnt > 1 || job->reply_payload.sg_cnt > 1) {
rc = -EINVAL;
goto out;
}
smp_buf = pqi_build_csmi_smp_passthru_buffer(rphy, job);
if (!smp_buf) {
rc = -ENOMEM;
goto out;
}
rc = pqi_csmi_smp_passthru(ctrl_info, smp_buf, sizeof(*smp_buf),
&error_info);
if (rc)
goto out;
reslen = pqi_build_sas_smp_handler_reply(smp_buf, job, &error_info);
out:
bsg_job_done(job, rc, reslen);
}
struct sas_function_template pqi_sas_transport_functions = {
.get_linkerrors = pqi_sas_get_linkerrors,
.get_enclosure_identifier = pqi_sas_get_enclosure_identifier,
.get_bay_identifier = pqi_sas_get_bay_identifier,
.phy_reset = pqi_sas_phy_reset,
.phy_enable = pqi_sas_phy_enable,
.phy_setup = pqi_sas_phy_setup,
.phy_release = pqi_sas_phy_release,
.set_phy_speed = pqi_sas_phy_speed,
.smp_handler = pqi_sas_smp_handler,
};
