[PATCH 3/3] ipr: Use PCI-E reset API for new ipr adapter
Brian King
brking at linux.vnet.ibm.com
Tue Feb 20 01:47:29 EST 2007
Use a newly added PCI API to issue a PCI Fundamental reset
(warm reset) to a new ipr PCI-E adapter. Typically, the
ipr adapter uses the start BIST bit in config space to reset
an adapter. Issuing start BIST on this particular adapter
results in the PCI-E logic on the card losing sync, which
causes PCI-E errors, making the card unusable. The only reset
mechanism that exists on this hardware that does not have this
problem is PCI Fundamental reset (warm reset).
Signed-off-by: Brian King <brking at linux.vnet.ibm.com>
---
linux-2.6-bjking1/drivers/scsi/ipr.c | 61 ++++++++++++++++++++++++++++++++---
linux-2.6-bjking1/drivers/scsi/ipr.h | 10 ++++-
2 files changed, 64 insertions(+), 7 deletions(-)
diff -puN drivers/scsi/ipr.h~ipr_pci_reset6 drivers/scsi/ipr.h
--- linux-2.6/drivers/scsi/ipr.h~ipr_pci_reset6 2007-02-16 10:16:07.000000000 -0600
+++ linux-2.6-bjking1/drivers/scsi/ipr.h 2007-02-16 10:18:40.000000000 -0600
@@ -37,8 +37,8 @@
/*
* Literals
*/
-#define IPR_DRIVER_VERSION "2.3.1"
-#define IPR_DRIVER_DATE "(January 23, 2007)"
+#define IPR_DRIVER_VERSION "2.3.2"
+#define IPR_DRIVER_DATE "(January 26, 2007)"
/*
* IPR_MAX_CMD_PER_LUN: This defines the maximum number of outstanding
@@ -104,6 +104,9 @@
#define IPR_IOASC_IOA_WAS_RESET 0x10000001
#define IPR_IOASC_PCI_ACCESS_ERROR 0x10000002
+/* Driver data flags */
+#define IPR_USE_PCI_WARM_RESET 0x00000001
+
#define IPR_DEFAULT_MAX_ERROR_DUMP 984
#define IPR_NUM_LOG_HCAMS 2
#define IPR_NUM_CFG_CHG_HCAMS 2
@@ -182,6 +185,7 @@
#define IPR_WAIT_FOR_RESET_TIMEOUT (2 * HZ)
#define IPR_CHECK_FOR_RESET_TIMEOUT (HZ / 10)
#define IPR_WAIT_FOR_BIST_TIMEOUT (2 * HZ)
+#define IPR_PCI_RESET_TIMEOUT (HZ / 2)
#define IPR_DUMP_TIMEOUT (15 * HZ)
/*
@@ -1058,6 +1062,7 @@ struct ipr_ioa_cfg {
u8 allow_cmds:1;
u8 allow_ml_add_del:1;
u8 needs_hard_reset:1;
+ u8 needs_warm_reset:1;
enum ipr_cache_state cache_state;
u16 type; /* CCIN of the card */
@@ -1150,6 +1155,7 @@ struct ipr_ioa_cfg {
struct pci_pool *ipr_cmd_pool;
struct ipr_cmnd *reset_cmd;
+ int (*reset) (struct ipr_cmnd *);
struct ata_host ata_host;
char ipr_cmd_label[8];
diff -puN drivers/scsi/ipr.c~ipr_pci_reset6 drivers/scsi/ipr.c
--- linux-2.6/drivers/scsi/ipr.c~ipr_pci_reset6 2007-02-16 10:16:07.000000000 -0600
+++ linux-2.6-bjking1/drivers/scsi/ipr.c 2007-02-16 10:18:29.000000000 -0600
@@ -6397,6 +6397,48 @@ static int ipr_reset_start_bist(struct i
}
/**
+ * ipr_reset_slot_reset_done - Clear PCI reset to the adapter
+ * @ipr_cmd: ipr command struct
+ *
+ * Description: This clears PCI reset to the adapter and delays two seconds.
+ *
+ * Return value:
+ * IPR_RC_JOB_RETURN
+ **/
+static int ipr_reset_slot_reset_done(struct ipr_cmnd *ipr_cmd)
+{
+ ENTER;
+ pci_set_pcie_reset_state(ipr_cmd->ioa_cfg->pdev, pci_reset_normal);
+ ipr_cmd->job_step = ipr_reset_bist_done;
+ ipr_reset_start_timer(ipr_cmd, IPR_WAIT_FOR_BIST_TIMEOUT);
+ LEAVE;
+ return IPR_RC_JOB_RETURN;
+}
+
+/**
+ * ipr_reset_slot_reset - Reset the PCI slot of the adapter.
+ * @ipr_cmd: ipr command struct
+ *
+ * Description: This asserts PCI reset to the adapter.
+ *
+ * Return value:
+ * IPR_RC_JOB_RETURN
+ **/
+static int ipr_reset_slot_reset(struct ipr_cmnd *ipr_cmd)
+{
+ struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
+ struct pci_dev *pdev = ioa_cfg->pdev;
+
+ ENTER;
+ pci_block_user_cfg_access(pdev);
+ pci_set_pcie_reset_state(pdev, pci_reset_pcie_warm_reset);
+ ipr_cmd->job_step = ipr_reset_slot_reset_done;
+ ipr_reset_start_timer(ipr_cmd, IPR_PCI_RESET_TIMEOUT);
+ LEAVE;
+ return IPR_RC_JOB_RETURN;
+}
+
+/**
* ipr_reset_allowed - Query whether or not IOA can be reset
* @ioa_cfg: ioa config struct
*
@@ -6435,7 +6477,7 @@ static int ipr_reset_wait_to_start_bist(
ipr_cmd->u.time_left -= IPR_CHECK_FOR_RESET_TIMEOUT;
ipr_reset_start_timer(ipr_cmd, IPR_CHECK_FOR_RESET_TIMEOUT);
} else {
- ipr_cmd->job_step = ipr_reset_start_bist;
+ ipr_cmd->job_step = ioa_cfg->reset;
rc = IPR_RC_JOB_CONTINUE;
}
@@ -6468,7 +6510,7 @@ static int ipr_reset_alert(struct ipr_cm
writel(IPR_UPROCI_RESET_ALERT, ioa_cfg->regs.set_uproc_interrupt_reg);
ipr_cmd->job_step = ipr_reset_wait_to_start_bist;
} else {
- ipr_cmd->job_step = ipr_reset_start_bist;
+ ipr_cmd->job_step = ioa_cfg->reset;
}
ipr_cmd->u.time_left = IPR_WAIT_FOR_RESET_TIMEOUT;
@@ -6748,8 +6790,11 @@ static pci_ers_result_t ipr_pci_slot_res
struct ipr_ioa_cfg *ioa_cfg = pci_get_drvdata(pdev);
spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
- _ipr_initiate_ioa_reset(ioa_cfg, ipr_reset_restore_cfg_space,
- IPR_SHUTDOWN_NONE);
+ if (ioa_cfg->needs_warm_reset)
+ ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
+ else
+ _ipr_initiate_ioa_reset(ioa_cfg, ipr_reset_restore_cfg_space,
+ IPR_SHUTDOWN_NONE);
spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
return PCI_ERS_RESULT_RECOVERED;
}
@@ -7313,6 +7358,12 @@ static int __devinit ipr_probe_ioa(struc
goto cleanup_nolog;
}
+ if (dev_id->driver_data & IPR_USE_PCI_WARM_RESET) {
+ ioa_cfg->needs_warm_reset = 1;
+ ioa_cfg->reset = ipr_reset_slot_reset;
+ } else
+ ioa_cfg->reset = ipr_reset_start_bist;
+
spin_lock(&ipr_driver_lock);
list_add_tail(&ioa_cfg->queue, &ipr_ioa_head);
spin_unlock(&ipr_driver_lock);
@@ -7553,7 +7604,7 @@ static struct pci_device_id ipr_pci_tabl
{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_OBSIDIAN,
PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_575C, 0, 0, 0 },
{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_OBSIDIAN_E,
- PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57B7, 0, 0, 0 },
+ PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57B7, 0, 0, IPR_USE_PCI_WARM_RESET},
{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_SNIPE,
PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_2780, 0, 0, 0 },
{ PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_SCAMP,
_
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