* [PATCH v3 1/2] mpt3sas: Reload SBR without rebooting HBA
2023-12-28 11:48 [PATCH v3 0/2] mpt3sas: Update/reload SBR without rebooting HBA Ranjan Kumar
@ 2023-12-28 11:48 ` Ranjan Kumar
2023-12-28 11:48 ` [PATCH v3 2/2] mpt3sas: Update driver version to 48.100.00.00 Ranjan Kumar
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: Ranjan Kumar @ 2023-12-28 11:48 UTC (permalink / raw)
To: linux-scsi, martin.petersen
Cc: sathya.prakash, sreekanth.reddy, Ranjan Kumar, kernel test robot
[-- Attachment #1: Type: text/plain, Size: 11127 bytes --]
Added a new IOCTL command MPT3ENABLEDIAGSBRRELOAD.
As a part of firmware update operation, applications use this IOCTL
command to set the SBR reload bit in the Host Diagnostic register.
So that HBA firmware is updated without power-cycling the system.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202312280909.MZyhxwBL-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202312281141.jDyPezRn-lkp@intel.com/
Signed-off-by: Ranjan Kumar <ranjan.kumar@broadcom.com>
---
drivers/scsi/mpt3sas/mpt3sas_base.c | 99 +++++++++++++++++++---------
drivers/scsi/mpt3sas/mpt3sas_base.h | 4 ++
drivers/scsi/mpt3sas/mpt3sas_ctl.c | 54 +++++++++++++++
drivers/scsi/mpt3sas/mpt3sas_ctl.h | 10 +++
drivers/scsi/mpt3sas/mpt3sas_scsih.c | 1 +
5 files changed, 136 insertions(+), 32 deletions(-)
diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c
index 8761bc58d965..fc8c45e15235 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.c
@@ -5481,7 +5481,7 @@ mpt3sas_atto_validate_nvram(struct MPT3SAS_ADAPTER *ioc,
* mpt3sas_atto_get_sas_addr - get the ATTO SAS address from mfg page 1
*
* @ioc : per adapter object
- * @*sas_addr : return sas address
+ * @sas_addr : return sas address
* Return: 0 for success, non-zero for failure.
*/
static int
@@ -7914,26 +7914,22 @@ mpt3sas_base_validate_event_type(struct MPT3SAS_ADAPTER *ioc, u32 *event_type)
}
/**
- * _base_diag_reset - the "big hammer" start of day reset
- * @ioc: per adapter object
- *
- * Return: 0 for success, non-zero for failure.
- */
-static int
-_base_diag_reset(struct MPT3SAS_ADAPTER *ioc)
-{
- u32 host_diagnostic;
- u32 ioc_state;
- u32 count;
- u32 hcb_size;
-
- ioc_info(ioc, "sending diag reset !!\n");
-
- pci_cfg_access_lock(ioc->pdev);
+* mpt3sas_base_unlock_and_get_host_diagnostic- enable Host Diagnostic Register writes
+* @ioc: per adapter object
+* @host_diagnostic: host diagnostic register content
+*
+* Return: 0 for success, non-zero for failure.
+*/
- drsprintk(ioc, ioc_info(ioc, "clear interrupts\n"));
+int
+mpt3sas_base_unlock_and_get_host_diagnostic(struct MPT3SAS_ADAPTER *ioc,
+ u32 *host_diagnostic)
+{
+ u32 count;
+ *host_diagnostic = 0;
count = 0;
+
do {
/* Write magic sequence to WriteSequence register
* Loop until in diagnostic mode
@@ -7952,30 +7948,67 @@ _base_diag_reset(struct MPT3SAS_ADAPTER *ioc)
if (count++ > 20) {
ioc_info(ioc,
- "Stop writing magic sequence after 20 retries\n");
+ "Stop writing magic sequence after 20 retries\n");
_base_dump_reg_set(ioc);
- goto out;
+ return -EFAULT;
}
- host_diagnostic = ioc->base_readl_ext_retry(&ioc->chip->HostDiagnostic);
+ *host_diagnostic = ioc->base_readl_ext_retry(&ioc->chip->HostDiagnostic);
drsprintk(ioc,
- ioc_info(ioc, "wrote magic sequence: count(%d), host_diagnostic(0x%08x)\n",
- count, host_diagnostic));
+ ioc_info(ioc, "wrote magic sequence: count(%d), host_diagnostic(0x%08x)\n",
+ count, *host_diagnostic));
- } while ((host_diagnostic & MPI2_DIAG_DIAG_WRITE_ENABLE) == 0);
+ } while ((*host_diagnostic & MPI2_DIAG_DIAG_WRITE_ENABLE) == 0);
+ return 0;
+}
- hcb_size = ioc->base_readl(&ioc->chip->HCBSize);
+/**
+ * mpt3sas_base_lock_host_diagnostic: Disable Host Diagnostic Register writes
+ * @ioc: per adapter object
+ */
+void
+mpt3sas_base_lock_host_diagnostic(struct MPT3SAS_ADAPTER *ioc)
+{
+ drsprintk(ioc, ioc_info(ioc, "disable writes to the diagnostic register\n"));
+ writel(MPI2_WRSEQ_FLUSH_KEY_VALUE, &ioc->chip->WriteSequence);
+}
+
+/**
+ * _base_diag_reset - the "big hammer" start of day reset
+ * @ioc: per adapter object
+ *
+ * Return: 0 for success, non-zero for failure.
+ */
+static int
+_base_diag_reset(struct MPT3SAS_ADAPTER *ioc)
+{
+ u32 host_diagnostic;
+ u32 ioc_state;
+ u32 count;
+ u32 hcb_size;
+
+ ioc_info(ioc, "sending diag reset !!\n");
+
+ pci_cfg_access_lock(ioc->pdev);
+
+ drsprintk(ioc, ioc_info(ioc, "clear interrupts\n"));
+
+ mutex_lock(&ioc->hostdiag_unlock_mutex);
+ if (mpt3sas_base_unlock_and_get_host_diagnostic(ioc, &host_diagnostic))
+ goto out;
+
+ hcb_size = ioc->base_readl(&ioc->chip->HCBSize);
drsprintk(ioc, ioc_info(ioc, "diag reset: issued\n"));
writel(host_diagnostic | MPI2_DIAG_RESET_ADAPTER,
&ioc->chip->HostDiagnostic);
- /*This delay allows the chip PCIe hardware time to finish reset tasks*/
+ /* This delay allows the chip PCIe hardware time to finish reset tasks */
msleep(MPI2_HARD_RESET_PCIE_FIRST_READ_DELAY_MICRO_SEC/1000);
/* Approximately 300 second max wait */
for (count = 0; count < (300000000 /
- MPI2_HARD_RESET_PCIE_SECOND_READ_DELAY_MICRO_SEC); count++) {
+ MPI2_HARD_RESET_PCIE_SECOND_READ_DELAY_MICRO_SEC); count++) {
host_diagnostic = ioc->base_readl_ext_retry(&ioc->chip->HostDiagnostic);
@@ -7988,13 +8021,15 @@ _base_diag_reset(struct MPT3SAS_ADAPTER *ioc)
if (!(host_diagnostic & MPI2_DIAG_RESET_ADAPTER))
break;
- msleep(MPI2_HARD_RESET_PCIE_SECOND_READ_DELAY_MICRO_SEC / 1000);
+ /* Wait to pass the second read delay window */
+ msleep(MPI2_HARD_RESET_PCIE_SECOND_READ_DELAY_MICRO_SEC/1000);
}
if (host_diagnostic & MPI2_DIAG_HCB_MODE) {
drsprintk(ioc,
- ioc_info(ioc, "restart the adapter assuming the HCB Address points to good F/W\n"));
+ ioc_info(ioc, "restart the adapter assuming the\n"
+ "HCB Address points to good F/W\n"));
host_diagnostic &= ~MPI2_DIAG_BOOT_DEVICE_SELECT_MASK;
host_diagnostic |= MPI2_DIAG_BOOT_DEVICE_SELECT_HCDW;
writel(host_diagnostic, &ioc->chip->HostDiagnostic);
@@ -8008,9 +8043,8 @@ _base_diag_reset(struct MPT3SAS_ADAPTER *ioc)
writel(host_diagnostic & ~MPI2_DIAG_HOLD_IOC_RESET,
&ioc->chip->HostDiagnostic);
- drsprintk(ioc,
- ioc_info(ioc, "disable writes to the diagnostic register\n"));
- writel(MPI2_WRSEQ_FLUSH_KEY_VALUE, &ioc->chip->WriteSequence);
+ mpt3sas_base_lock_host_diagnostic(ioc);
+ mutex_unlock(&ioc->hostdiag_unlock_mutex);
drsprintk(ioc, ioc_info(ioc, "Wait for FW to go to the READY state\n"));
ioc_state = _base_wait_on_iocstate(ioc, MPI2_IOC_STATE_READY, 20);
@@ -8028,6 +8062,7 @@ _base_diag_reset(struct MPT3SAS_ADAPTER *ioc)
out:
pci_cfg_access_unlock(ioc->pdev);
ioc_err(ioc, "diag reset: FAILED\n");
+ mutex_unlock(&ioc->hostdiag_unlock_mutex);
return -EFAULT;
}
diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.h b/drivers/scsi/mpt3sas/mpt3sas_base.h
index 6d0bc8c66700..de60ef8a7908 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.h
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.h
@@ -1366,6 +1366,7 @@ struct MPT3SAS_ADAPTER {
u8 got_task_abort_from_ioctl;
struct mutex reset_in_progress_mutex;
+ struct mutex hostdiag_unlock_mutex;
spinlock_t ioc_reset_in_progress_lock;
u8 ioc_link_reset_in_progress;
@@ -1790,6 +1791,9 @@ void mpt3sas_base_disable_msix(struct MPT3SAS_ADAPTER *ioc);
int mpt3sas_blk_mq_poll(struct Scsi_Host *shost, unsigned int queue_num);
void mpt3sas_base_pause_mq_polling(struct MPT3SAS_ADAPTER *ioc);
void mpt3sas_base_resume_mq_polling(struct MPT3SAS_ADAPTER *ioc);
+int mpt3sas_base_unlock_and_get_host_diagnostic(struct MPT3SAS_ADAPTER *ioc,
+ u32 *host_diagnostic);
+void mpt3sas_base_lock_host_diagnostic(struct MPT3SAS_ADAPTER *ioc);
/* scsih shared API */
struct scsi_cmnd *mpt3sas_scsih_scsi_lookup_get(struct MPT3SAS_ADAPTER *ioc,
diff --git a/drivers/scsi/mpt3sas/mpt3sas_ctl.c b/drivers/scsi/mpt3sas/mpt3sas_ctl.c
index 147cb7088d55..1c9fd26195b8 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_ctl.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_ctl.c
@@ -2543,6 +2543,56 @@ _ctl_addnl_diag_query(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
return 0;
}
+/**
+ * _ctl_enable_diag_sbr_reload - enable sbr reload bit
+ * @ioc: per adapter object
+ * @arg: user space buffer containing ioctl content
+ *
+ * Enable the SBR reload bit
+ */
+static int
+_ctl_enable_diag_sbr_reload(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
+{
+ u32 ioc_state, host_diagnostic;
+
+ if (ioc->shost_recovery ||
+ ioc->pci_error_recovery || ioc->is_driver_loading ||
+ ioc->remove_host)
+ return -EAGAIN;
+
+ ioc_state = mpt3sas_base_get_iocstate(ioc, 1);
+
+ if (ioc_state != MPI2_IOC_STATE_OPERATIONAL)
+ return -EFAULT;
+
+ host_diagnostic = ioc->base_readl(&ioc->chip->HostDiagnostic);
+
+ if (host_diagnostic & MPI2_DIAG_SBR_RELOAD)
+ return 0;
+
+ if (mutex_trylock(&ioc->hostdiag_unlock_mutex)) {
+ if (mpt3sas_base_unlock_and_get_host_diagnostic(ioc, &host_diagnostic)) {
+ mutex_unlock(&ioc->hostdiag_unlock_mutex);
+ return -EFAULT;
+ }
+ } else
+ return -EAGAIN;
+
+ host_diagnostic |= MPI2_DIAG_SBR_RELOAD;
+ writel(host_diagnostic, &ioc->chip->HostDiagnostic);
+ host_diagnostic = ioc->base_readl(&ioc->chip->HostDiagnostic);
+ mpt3sas_base_lock_host_diagnostic(ioc);
+ mutex_unlock(&ioc->hostdiag_unlock_mutex);
+
+ if (!(host_diagnostic & MPI2_DIAG_SBR_RELOAD)) {
+ ioc_err(ioc, "%s: Failed to set Diag SBR Reload Bit\n", __func__);
+ return -EFAULT;
+ }
+
+ ioc_info(ioc, "%s: Successfully set the Diag SBR Reload Bit\n", __func__);
+ return 0;
+}
+
#ifdef CONFIG_COMPAT
/**
* _ctl_compat_mpt_command - convert 32bit pointers to 64bit.
@@ -2719,6 +2769,10 @@ _ctl_ioctl_main(struct file *file, unsigned int cmd, void __user *arg,
if (_IOC_SIZE(cmd) == sizeof(struct mpt3_addnl_diag_query))
ret = _ctl_addnl_diag_query(ioc, arg);
break;
+ case MPT3ENABLEDIAGSBRRELOAD:
+ if (_IOC_SIZE(cmd) == sizeof(struct mpt3_enable_diag_sbr_reload))
+ ret = _ctl_enable_diag_sbr_reload(ioc, arg);
+ break;
default:
dctlprintk(ioc,
ioc_info(ioc, "unsupported ioctl opcode(0x%08x)\n",
diff --git a/drivers/scsi/mpt3sas/mpt3sas_ctl.h b/drivers/scsi/mpt3sas/mpt3sas_ctl.h
index 8f6ffb40261c..171709e91006 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_ctl.h
+++ b/drivers/scsi/mpt3sas/mpt3sas_ctl.h
@@ -98,6 +98,8 @@
struct mpt3_diag_read_buffer)
#define MPT3ADDNLDIAGQUERY _IOWR(MPT3_MAGIC_NUMBER, 32, \
struct mpt3_addnl_diag_query)
+#define MPT3ENABLEDIAGSBRRELOAD _IOWR(MPT3_MAGIC_NUMBER, 33, \
+ struct mpt3_enable_diag_sbr_reload)
/* Trace Buffer default UniqueId */
#define MPT2DIAGBUFFUNIQUEID (0x07075900)
@@ -448,4 +450,12 @@ struct mpt3_addnl_diag_query {
uint32_t reserved2[2];
};
+/**
+ * struct mpt3_enable_diag_sbr_reload - enable sbr reload
+ * @hdr - generic header
+ */
+struct mpt3_enable_diag_sbr_reload {
+ struct mpt3_ioctl_header hdr;
+};
+
#endif /* MPT3SAS_CTL_H_INCLUDED */
diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
index 51b5788da040..ef8ee93005ea 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
@@ -12240,6 +12240,7 @@ _scsih_probe(struct pci_dev *pdev, const struct pci_device_id *id)
/* misc semaphores and spin locks */
mutex_init(&ioc->reset_in_progress_mutex);
+ mutex_init(&ioc->hostdiag_unlock_mutex);
/* initializing pci_access_mutex lock */
mutex_init(&ioc->pci_access_mutex);
spin_lock_init(&ioc->ioc_reset_in_progress_lock);
--
2.31.1
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