[SCSI] mpt2sas: Added expander phy control support
Added support to send link resets, hard resets, enable/disable phys, and
changing link rates for for expanders. This will be exported to
attributes within the sas transport layer. A new wrapper function was
added for sending SMP passthru to expanders for phy control.
Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/scsi/mpt2sas/mpt2sas_transport.c b/drivers/scsi/mpt2sas/mpt2sas_transport.c
index a96501f..6c94dee 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_transport.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_transport.c
@@ -940,16 +940,6 @@
return shost_priv(shost);
}
-static struct _sas_phy *
-_transport_find_local_phy(struct MPT2SAS_ADAPTER *ioc, struct sas_phy *phy)
-{
- int i;
-
- for (i = 0; i < ioc->sas_hba.num_phys; i++)
- if (ioc->sas_hba.phy[i].phy == phy)
- return(&ioc->sas_hba.phy[i]);
- return NULL;
-}
/* report phy error log structure */
struct phy_error_log_request{
@@ -1270,32 +1260,260 @@
return sas_device->slot;
}
+/* phy control request structure */
+struct phy_control_request{
+ u8 smp_frame_type; /* 0x40 */
+ u8 function; /* 0x91 */
+ u8 allocated_response_length;
+ u8 request_length; /* 0x09 */
+ u16 expander_change_count;
+ u8 reserved_1[3];
+ u8 phy_identifier;
+ u8 phy_operation;
+ u8 reserved_2[13];
+ u64 attached_device_name;
+ u8 programmed_min_physical_link_rate;
+ u8 programmed_max_physical_link_rate;
+ u8 reserved_3[6];
+};
+
+/* phy control reply structure */
+struct phy_control_reply{
+ u8 smp_frame_type; /* 0x41 */
+ u8 function; /* 0x11 */
+ u8 function_result;
+ u8 response_length;
+};
+
+#define SMP_PHY_CONTROL_LINK_RESET (0x01)
+#define SMP_PHY_CONTROL_HARD_RESET (0x02)
+#define SMP_PHY_CONTROL_DISABLE (0x03)
+
+/**
+ * _transport_expander_phy_control - expander phy control
+ * @ioc: per adapter object
+ * @phy: The sas phy object
+ *
+ * Returns 0 for success, non-zero for failure.
+ *
+ */
+static int
+_transport_expander_phy_control(struct MPT2SAS_ADAPTER *ioc,
+ struct sas_phy *phy, u8 phy_operation)
+{
+ Mpi2SmpPassthroughRequest_t *mpi_request;
+ Mpi2SmpPassthroughReply_t *mpi_reply;
+ struct phy_control_request *phy_control_request;
+ struct phy_control_reply *phy_control_reply;
+ int rc;
+ u16 smid;
+ u32 ioc_state;
+ unsigned long timeleft;
+ void *psge;
+ u32 sgl_flags;
+ u8 issue_reset = 0;
+ void *data_out = NULL;
+ dma_addr_t data_out_dma;
+ u32 sz;
+ u64 *sas_address_le;
+ u16 wait_state_count;
+
+ if (ioc->shost_recovery) {
+ printk(MPT2SAS_INFO_FMT "%s: host reset in progress!\n",
+ __func__, ioc->name);
+ return -EFAULT;
+ }
+
+ mutex_lock(&ioc->transport_cmds.mutex);
+
+ if (ioc->transport_cmds.status != MPT2_CMD_NOT_USED) {
+ printk(MPT2SAS_ERR_FMT "%s: transport_cmds in use\n",
+ ioc->name, __func__);
+ rc = -EAGAIN;
+ goto out;
+ }
+ ioc->transport_cmds.status = MPT2_CMD_PENDING;
+
+ wait_state_count = 0;
+ ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
+ while (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
+ if (wait_state_count++ == 10) {
+ printk(MPT2SAS_ERR_FMT
+ "%s: failed due to ioc not operational\n",
+ ioc->name, __func__);
+ rc = -EFAULT;
+ goto out;
+ }
+ ssleep(1);
+ ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
+ printk(MPT2SAS_INFO_FMT "%s: waiting for "
+ "operational state(count=%d)\n", ioc->name,
+ __func__, wait_state_count);
+ }
+ if (wait_state_count)
+ printk(MPT2SAS_INFO_FMT "%s: ioc is operational\n",
+ ioc->name, __func__);
+
+ smid = mpt2sas_base_get_smid(ioc, ioc->transport_cb_idx);
+ if (!smid) {
+ printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
+ ioc->name, __func__);
+ rc = -EAGAIN;
+ goto out;
+ }
+
+ mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
+ ioc->transport_cmds.smid = smid;
+
+ sz = sizeof(struct phy_control_request) +
+ sizeof(struct phy_control_reply);
+ data_out = pci_alloc_consistent(ioc->pdev, sz, &data_out_dma);
+ if (!data_out) {
+ printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
+ __LINE__, __func__);
+ rc = -ENOMEM;
+ mpt2sas_base_free_smid(ioc, smid);
+ goto out;
+ }
+
+ rc = -EINVAL;
+ memset(data_out, 0, sz);
+ phy_control_request = data_out;
+ phy_control_request->smp_frame_type = 0x40;
+ phy_control_request->function = 0x91;
+ phy_control_request->request_length = 9;
+ phy_control_request->allocated_response_length = 0;
+ phy_control_request->phy_identifier = phy->number;
+ phy_control_request->phy_operation = phy_operation;
+ phy_control_request->programmed_min_physical_link_rate =
+ phy->minimum_linkrate << 4;
+ phy_control_request->programmed_max_physical_link_rate =
+ phy->maximum_linkrate << 4;
+
+ memset(mpi_request, 0, sizeof(Mpi2SmpPassthroughRequest_t));
+ mpi_request->Function = MPI2_FUNCTION_SMP_PASSTHROUGH;
+ mpi_request->PhysicalPort = 0xFF;
+ mpi_request->VF_ID = 0; /* TODO */
+ mpi_request->VP_ID = 0;
+ sas_address_le = (u64 *)&mpi_request->SASAddress;
+ *sas_address_le = cpu_to_le64(phy->identify.sas_address);
+ mpi_request->RequestDataLength =
+ cpu_to_le16(sizeof(struct phy_error_log_request));
+ psge = &mpi_request->SGL;
+
+ /* WRITE sgel first */
+ sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
+ MPI2_SGE_FLAGS_END_OF_BUFFER | MPI2_SGE_FLAGS_HOST_TO_IOC);
+ sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
+ ioc->base_add_sg_single(psge, sgl_flags |
+ sizeof(struct phy_control_request), data_out_dma);
+
+ /* incr sgel */
+ psge += ioc->sge_size;
+
+ /* READ sgel last */
+ sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
+ MPI2_SGE_FLAGS_LAST_ELEMENT | MPI2_SGE_FLAGS_END_OF_BUFFER |
+ MPI2_SGE_FLAGS_END_OF_LIST);
+ sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
+ ioc->base_add_sg_single(psge, sgl_flags |
+ sizeof(struct phy_control_reply), data_out_dma +
+ sizeof(struct phy_control_request));
+
+ dtransportprintk(ioc, printk(MPT2SAS_INFO_FMT "phy_control - "
+ "send to sas_addr(0x%016llx), phy(%d), opcode(%d)\n", ioc->name,
+ (unsigned long long)phy->identify.sas_address, phy->number,
+ phy_operation));
+ mpt2sas_base_put_smid_default(ioc, smid);
+ init_completion(&ioc->transport_cmds.done);
+ timeleft = wait_for_completion_timeout(&ioc->transport_cmds.done,
+ 10*HZ);
+
+ if (!(ioc->transport_cmds.status & MPT2_CMD_COMPLETE)) {
+ printk(MPT2SAS_ERR_FMT "%s: timeout\n",
+ ioc->name, __func__);
+ _debug_dump_mf(mpi_request,
+ sizeof(Mpi2SmpPassthroughRequest_t)/4);
+ if (!(ioc->transport_cmds.status & MPT2_CMD_RESET))
+ issue_reset = 1;
+ goto issue_host_reset;
+ }
+
+ dtransportprintk(ioc, printk(MPT2SAS_INFO_FMT "phy_control - "
+ "complete\n", ioc->name));
+
+ if (ioc->transport_cmds.status & MPT2_CMD_REPLY_VALID) {
+
+ mpi_reply = ioc->transport_cmds.reply;
+
+ dtransportprintk(ioc, printk(MPT2SAS_INFO_FMT
+ "phy_control - reply data transfer size(%d)\n",
+ ioc->name, le16_to_cpu(mpi_reply->ResponseDataLength)));
+
+ if (le16_to_cpu(mpi_reply->ResponseDataLength) !=
+ sizeof(struct phy_control_reply))
+ goto out;
+
+ phy_control_reply = data_out +
+ sizeof(struct phy_control_request);
+
+ dtransportprintk(ioc, printk(MPT2SAS_INFO_FMT
+ "phy_control - function_result(%d)\n",
+ ioc->name, phy_control_reply->function_result));
+
+ rc = 0;
+ } else
+ dtransportprintk(ioc, printk(MPT2SAS_INFO_FMT
+ "phy_control - no reply\n", ioc->name));
+
+ issue_host_reset:
+ if (issue_reset)
+ mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
+ FORCE_BIG_HAMMER);
+ out:
+ ioc->transport_cmds.status = MPT2_CMD_NOT_USED;
+ if (data_out)
+ pci_free_consistent(ioc->pdev, sz, data_out, data_out_dma);
+
+ mutex_unlock(&ioc->transport_cmds.mutex);
+ return rc;
+}
+
/**
* _transport_phy_reset -
* @phy: The sas phy object
* @hard_reset:
*
- * Only support sas_host direct attached phys.
* Returns 0 for success, non-zero for failure.
*/
static int
_transport_phy_reset(struct sas_phy *phy, int hard_reset)
{
struct MPT2SAS_ADAPTER *ioc = phy_to_ioc(phy);
- struct _sas_phy *mpt2sas_phy;
Mpi2SasIoUnitControlReply_t mpi_reply;
Mpi2SasIoUnitControlRequest_t mpi_request;
+ unsigned long flags;
- mpt2sas_phy = _transport_find_local_phy(ioc, phy);
-
- if (!mpt2sas_phy) /* this phy not on sas_host */
+ spin_lock_irqsave(&ioc->sas_node_lock, flags);
+ if (_transport_sas_node_find_by_sas_address(ioc,
+ phy->identify.sas_address) == NULL) {
+ spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
return -EINVAL;
+ }
+ spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
+ /* handle expander phys */
+ if (phy->identify.sas_address != ioc->sas_hba.sas_address)
+ return _transport_expander_phy_control(ioc, phy,
+ (hard_reset == 1) ? SMP_PHY_CONTROL_HARD_RESET :
+ SMP_PHY_CONTROL_LINK_RESET);
+
+ /* handle hba phys */
memset(&mpi_request, 0, sizeof(Mpi2SasIoUnitControlReply_t));
mpi_request.Function = MPI2_FUNCTION_SAS_IO_UNIT_CONTROL;
mpi_request.Operation = hard_reset ?
MPI2_SAS_OP_PHY_HARD_RESET : MPI2_SAS_OP_PHY_LINK_RESET;
- mpi_request.PhyNum = mpt2sas_phy->phy_id;
+ mpi_request.PhyNum = phy->number;
if ((mpt2sas_base_sas_iounit_control(ioc, &mpi_reply, &mpi_request))) {
printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
@@ -1306,8 +1524,7 @@
if (mpi_reply.IOCStatus || mpi_reply.IOCLogInfo)
printk(MPT2SAS_INFO_FMT "phy(%d), ioc_status"
"(0x%04x), loginfo(0x%08x)\n", ioc->name,
- mpt2sas_phy->phy_id,
- le16_to_cpu(mpi_reply.IOCStatus),
+ phy->number, le16_to_cpu(mpi_reply.IOCStatus),
le32_to_cpu(mpi_reply.IOCLogInfo));
return 0;
@@ -1325,17 +1542,28 @@
_transport_phy_enable(struct sas_phy *phy, int enable)
{
struct MPT2SAS_ADAPTER *ioc = phy_to_ioc(phy);
- struct _sas_phy *mpt2sas_phy;
Mpi2SasIOUnitPage1_t *sas_iounit_pg1 = NULL;
Mpi2ConfigReply_t mpi_reply;
u16 ioc_status;
u16 sz;
int rc = 0;
+ unsigned long flags;
- mpt2sas_phy = _transport_find_local_phy(ioc, phy);
-
- if (!mpt2sas_phy) /* this phy not on sas_host */
+ spin_lock_irqsave(&ioc->sas_node_lock, flags);
+ if (_transport_sas_node_find_by_sas_address(ioc,
+ phy->identify.sas_address) == NULL) {
+ spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
return -EINVAL;
+ }
+ spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
+
+ /* handle expander phys */
+ if (phy->identify.sas_address != ioc->sas_hba.sas_address)
+ return _transport_expander_phy_control(ioc, phy,
+ (enable == 1) ? SMP_PHY_CONTROL_LINK_RESET :
+ SMP_PHY_CONTROL_DISABLE);
+
+ /* handle hba phys */
/* sas_iounit page 1 */
sz = offsetof(Mpi2SasIOUnitPage1_t, PhyData) + (ioc->sas_hba.num_phys *
@@ -1364,14 +1592,18 @@
}
if (enable)
- sas_iounit_pg1->PhyData[mpt2sas_phy->phy_id].PhyFlags
+ sas_iounit_pg1->PhyData[phy->number].PhyFlags
&= ~MPI2_SASIOUNIT1_PHYFLAGS_PHY_DISABLE;
else
- sas_iounit_pg1->PhyData[mpt2sas_phy->phy_id].PhyFlags
+ sas_iounit_pg1->PhyData[phy->number].PhyFlags
|= MPI2_SASIOUNIT1_PHYFLAGS_PHY_DISABLE;
mpt2sas_config_set_sas_iounit_pg1(ioc, &mpi_reply, sas_iounit_pg1, sz);
+ /* link reset */
+ if (enable)
+ _transport_phy_reset(phy, 0);
+
out:
kfree(sas_iounit_pg1);
return rc;
@@ -1389,7 +1621,6 @@
_transport_phy_speed(struct sas_phy *phy, struct sas_phy_linkrates *rates)
{
struct MPT2SAS_ADAPTER *ioc = phy_to_ioc(phy);
- struct _sas_phy *mpt2sas_phy;
Mpi2SasIOUnitPage1_t *sas_iounit_pg1 = NULL;
Mpi2SasPhyPage0_t phy_pg0;
Mpi2ConfigReply_t mpi_reply;
@@ -1397,11 +1628,15 @@
u16 sz;
int i;
int rc = 0;
+ unsigned long flags;
- mpt2sas_phy = _transport_find_local_phy(ioc, phy);
-
- if (!mpt2sas_phy) /* this phy not on sas_host */
+ spin_lock_irqsave(&ioc->sas_node_lock, flags);
+ if (_transport_sas_node_find_by_sas_address(ioc,
+ phy->identify.sas_address) == NULL) {
+ spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
return -EINVAL;
+ }
+ spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
if (!rates->minimum_linkrate)
rates->minimum_linkrate = phy->minimum_linkrate;
@@ -1413,6 +1648,16 @@
else if (rates->maximum_linkrate > phy->maximum_linkrate_hw)
rates->maximum_linkrate = phy->maximum_linkrate_hw;
+ /* handle expander phys */
+ if (phy->identify.sas_address != ioc->sas_hba.sas_address) {
+ phy->minimum_linkrate = rates->minimum_linkrate;
+ phy->maximum_linkrate = rates->maximum_linkrate;
+ return _transport_expander_phy_control(ioc, phy,
+ SMP_PHY_CONTROL_LINK_RESET);
+ }
+
+ /* handle hba phys */
+
/* sas_iounit page 1 */
sz = offsetof(Mpi2SasIOUnitPage1_t, PhyData) + (ioc->sas_hba.num_phys *
sizeof(Mpi2SasIOUnit1PhyData_t));
@@ -1440,7 +1685,7 @@
}
for (i = 0; i < ioc->sas_hba.num_phys; i++) {
- if (mpt2sas_phy->phy_id != i) {
+ if (phy->number != i) {
sas_iounit_pg1->PhyData[i].MaxMinLinkRate =
(ioc->sas_hba.phy[i].phy->minimum_linkrate +
(ioc->sas_hba.phy[i].phy->maximum_linkrate << 4));
@@ -1464,7 +1709,7 @@
/* read phy page 0, then update the rates in the sas transport phy */
if (!mpt2sas_config_get_phy_pg0(ioc, &mpi_reply, &phy_pg0,
- mpt2sas_phy->phy_id)) {
+ phy->number)) {
phy->minimum_linkrate = _transport_convert_phy_link_rate(
phy_pg0.ProgrammedLinkRate & MPI2_SAS_PRATE_MIN_RATE_MASK);
phy->maximum_linkrate = _transport_convert_phy_link_rate(