PCI: pcie, aer: refer mask state in mask register properly

ERR_{,UN}CORRECTABLE_ERROR_MASK are set of error bits which linux know,
set of PCI_ERR_COR_* and PCI_ERR_UNC_* defined in linux/pci_regs.h.
This masks make aerdrv not to report errors of unknown bit, while aerdrv
have ability to report such undefined errors as "Unknown Error Bit %2d".

OTOH aerdrv_errprint does not have any check of setting in mask register.
So it could report masked wrong error by finding bit in status without
knowing that the bit is masked in the mask register.

This patch changes aerdrv to use mask state in mask register propely
instead of defined/hardcoded ERR_{,UN}CORRECTABLE_ERROR_MASK.
This change prevents aerdrv from reporting masked error, and also enable
reporting unknown errors.

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Reviewed-by: Andrew Patterson <andrew.patterson@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

diff --git a/drivers/pci/pcie/aer/aerdrv.h b/drivers/pci/pcie/aer/aerdrv.h
index 820ea73d25f7c05f5b1a60742dfdb7aa3cbce716..0db530db943913bc8d38a34af17283e9f1e72983 100644 (file)
--- a/drivers/pci/pcie/aer/aerdrv.h
+++ b/drivers/pci/pcie/aer/aerdrv.h
@@ -47,9 +47,6 @@
 #define AER_TLP_HEADER_VALID_FLAG      0x00000001
 #define AER_MULTI_ERROR_VALID_FLAG     0x00000002
 
-#define ERR_CORRECTABLE_ERROR_MASK     0x000031c1
-#define ERR_UNCORRECTABLE_ERROR_MASK   0x001ff010
-
 struct header_log_regs {
        unsigned int dw0;
        unsigned int dw1;
@@ -65,6 +62,7 @@ struct aer_err_info {
        int severity;                   /* 0:NONFATAL | 1:FATAL | 2:COR */
        int flags;
        unsigned int status;            /* COR/UNCOR Error Status */
+       unsigned int mask;              /* COR/UNCOR Error Mask */
        struct header_log_regs tlp;     /* TLP Header */
 };
 

diff --git a/drivers/pci/pcie/aer/aerdrv_core.c b/drivers/pci/pcie/aer/aerdrv_core.c
index 4d67db8dd0d0db53fb59cecc085f84eeada5f4d7..38b3933200caa23fb751ab4ba534193c843fabe7 100644 (file)
--- a/drivers/pci/pcie/aer/aerdrv_core.c
+++ b/drivers/pci/pcie/aer/aerdrv_core.c
@@ -236,24 +236,16 @@ static int find_device_iter(struct pci_dev *dev, void *data)
        status = 0;
        mask = 0;
        if (e_info->severity == AER_CORRECTABLE) {
-               pci_read_config_dword(dev,
-                               pos + PCI_ERR_COR_STATUS,
-                               &status);
-               pci_read_config_dword(dev,
-                               pos + PCI_ERR_COR_MASK,
-                               &mask);
-               if (status & ERR_CORRECTABLE_ERROR_MASK & ~mask) {
+               pci_read_config_dword(dev, pos + PCI_ERR_COR_STATUS, &status);
+               pci_read_config_dword(dev, pos + PCI_ERR_COR_MASK, &mask);
+               if (status & ~mask) {
                        add_error_device(e_info, dev);
                        goto added;
                }
        } else {
-               pci_read_config_dword(dev,
-                               pos + PCI_ERR_UNCOR_STATUS,
-                               &status);
-               pci_read_config_dword(dev,
-                               pos + PCI_ERR_UNCOR_MASK,
-                               &mask);
-               if (status & ERR_UNCORRECTABLE_ERROR_MASK & ~mask) {
+               pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, &status);
+               pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_MASK, &mask);
+               if (status & ~mask) {
                        add_error_device(e_info, dev);
                        goto added;
                }
@@ -720,7 +712,9 @@ static int get_device_error_info(struct pci_dev *dev, struct aer_err_info *info)
        if (info->severity == AER_CORRECTABLE) {
                pci_read_config_dword(dev, pos + PCI_ERR_COR_STATUS,
                        &info->status);
-               if (!(info->status & ERR_CORRECTABLE_ERROR_MASK))
+               pci_read_config_dword(dev, pos + PCI_ERR_COR_MASK,
+                       &info->mask);
+               if (!(info->status & ~info->mask))
                        return AER_UNSUCCESS;
        } else if (dev->hdr_type & PCI_HEADER_TYPE_BRIDGE ||
                info->severity == AER_NONFATAL) {
@@ -728,7 +722,9 @@ static int get_device_error_info(struct pci_dev *dev, struct aer_err_info *info)
                /* Link is still healthy for IO reads */
                pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS,
                        &info->status);
-               if (!(info->status & ERR_UNCORRECTABLE_ERROR_MASK))
+               pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_MASK,
+                       &info->mask);
+               if (!(info->status & ~info->mask))
                        return AER_UNSUCCESS;
 
                if (info->status & AER_LOG_TLP_MASKS) {

diff --git a/drivers/pci/pcie/aer/aerdrv_errprint.c b/drivers/pci/pcie/aer/aerdrv_errprint.c
index 95c3f1ca80765605695af27ebd99b7a96e53a33c..41bd1c753ace6c0a99937b6843d6a56d484fef74 100644 (file)
--- a/drivers/pci/pcie/aer/aerdrv_errprint.c
+++ b/drivers/pci/pcie/aer/aerdrv_errprint.c
@@ -154,11 +154,13 @@ static char *aer_agent_string[] = {
 
 static void aer_print_error_source(struct aer_err_info *info)
 {
-       int i;
+       int i, status;
        char *errmsg = NULL;
 
+       status = (info->status & ~info->mask);
+
        for (i = 0; i < 32; i++) {
-               if (!(info->status & (1 << i)))
+               if (!(status & (1 << i)))
                        continue;
 
                if (info->severity == AER_CORRECTABLE)