[PATCH 12/21] ppc/eeh: trace error based on PE from beginning
There're 2 conditions to trigger EEH error detection: invalid value returned from reading I/O or config space. On each case, the function eeh_dn_check_failure will be called to initialize EEH event and put it into the poll for further processing. The patch changes the function for a little bit so that the EEH error will be traced based on PE instead of EEH device any more. Also, the function eeh_find_device_pe() has been removed since the eeh device is tracing the PE by struct eeh_dev::pe. Signed-off-by: Gavin Shan --- arch/powerpc/include/asm/ppc-pci.h |1 - arch/powerpc/platforms/pseries/eeh.c | 51 + arch/powerpc/platforms/pseries/msi.c |6 +++- 3 files changed, 25 insertions(+), 33 deletions(-) diff --git a/arch/powerpc/include/asm/ppc-pci.h b/arch/powerpc/include/asm/ppc-pci.h index c7e5bd6..3e301b1 100644 --- a/arch/powerpc/include/asm/ppc-pci.h +++ b/arch/powerpc/include/asm/ppc-pci.h @@ -59,7 +59,6 @@ int rtas_write_config(struct pci_dn *, int where, int size, u32 val); int rtas_read_config(struct pci_dn *, int where, int size, u32 *val); void eeh_pe_state_mark(struct eeh_pe *pe, int state); void eeh_pe_state_clear(struct eeh_pe *pe, int state); -struct device_node *eeh_find_device_pe(struct device_node *dn); void eeh_sysfs_add_device(struct pci_dev *pdev); void eeh_sysfs_remove_device(struct pci_dev *pdev); diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c index c527c46..341ba1a 100644 --- a/arch/powerpc/platforms/pseries/eeh.c +++ b/arch/powerpc/platforms/pseries/eeh.c @@ -264,21 +264,6 @@ static inline unsigned long eeh_token_to_phys(unsigned long token) } /** - * eeh_find_device_pe - Retrieve the PE for the given device - * @dn: device node - * - * Return the PE under which this device lies - */ -struct device_node *eeh_find_device_pe(struct device_node *dn) -{ - while (dn->parent && of_node_to_eeh_dev(dn->parent) && - (of_node_to_eeh_dev(dn->parent)->mode & EEH_MODE_SUPPORTED)) { - dn = dn->parent; - } - return dn; -} - -/** * eeh_dn_check_failure - Check if all 1's data is due to EEH slot freeze * @dn: device node * @dev: pci device, if known @@ -297,6 +282,7 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev) { int ret; unsigned long flags; + struct eeh_pe *pe; struct eeh_dev *edev; int rc = 0; const char *location; @@ -306,23 +292,26 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev) if (!eeh_subsystem_enabled) return 0; - if (!dn) { + if (dn) { + edev = of_node_to_eeh_dev(dn); + } else if (dev) { + edev = pci_dev_to_eeh_dev(dev); + dn = pci_device_to_OF_node(dev); + } else { eeh_stats.no_dn++; return 0; } - dn = eeh_find_device_pe(dn); - edev = of_node_to_eeh_dev(dn); + pe = edev->pe; /* Access to IO BARs might get this far and still not want checking. */ - if (!(edev->mode & EEH_MODE_SUPPORTED) || - edev->mode & EEH_MODE_NOCHECK) { + if (!pe) { eeh_stats.ignored_check++; - pr_debug("EEH: Ignored check (%x) for %s %s\n", - edev->mode, eeh_pci_name(dev), dn->full_name); + pr_debug("EEH: Ignored check for %s %s\n", + eeh_pci_name(dev), dn->full_name); return 0; } - if (!edev->config_addr && !edev->pe_config_addr) { + if (!pe->addr && !pe->config_addr) { eeh_stats.no_cfg_addr++; return 0; } @@ -335,13 +324,13 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev) */ raw_spin_lock_irqsave(&confirm_error_lock, flags); rc = 1; - if (edev->mode & EEH_MODE_ISOLATED) { - edev->check_count++; - if (edev->check_count % EEH_MAX_FAILS == 0) { + if (pe->state & EEH_PE_ISOLATED) { + pe->check_count++; + if (pe->check_count % EEH_MAX_FAILS == 0) { location = of_get_property(dn, "ibm,loc-code", NULL); printk(KERN_ERR "EEH: %d reads ignored for recovering device at " "location=%s driver=%s pci addr=%s\n", - edev->check_count, location, + pe->check_count, location, eeh_driver_name(dev), eeh_pci_name(dev)); printk(KERN_ERR "EEH: Might be infinite loop in %s driver\n", eeh_driver_name(dev)); @@ -357,7 +346,7 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev) * function zero of a multi-function device. * In any case they must share a common PHB.
[PATCH 12/21] ppc/eeh: trace error based on PE from beginning
There're 2 conditions to trigger EEH error detection: invalid value returned from reading I/O or config space. On each case, the function eeh_dn_check_failure will be called to initialize EEH event and put it into the poll for further processing. The patch changes the function for a little bit so that the EEH error will be traced based on PE instead of EEH device any more. Also, the function eeh_find_device_pe() has been removed since the eeh device is tracing the PE by struct eeh_dev::pe. Signed-off-by: Gavin Shan --- arch/powerpc/include/asm/ppc-pci.h |1 - arch/powerpc/platforms/pseries/eeh.c | 51 +- arch/powerpc/platforms/pseries/msi.c |6 +++- 3 files changed, 25 insertions(+), 33 deletions(-) diff --git a/arch/powerpc/include/asm/ppc-pci.h b/arch/powerpc/include/asm/ppc-pci.h index c7e5bd6..3e301b1 100644 --- a/arch/powerpc/include/asm/ppc-pci.h +++ b/arch/powerpc/include/asm/ppc-pci.h @@ -59,7 +59,6 @@ int rtas_write_config(struct pci_dn *, int where, int size, u32 val); int rtas_read_config(struct pci_dn *, int where, int size, u32 *val); void eeh_pe_state_mark(struct eeh_pe *pe, int state); void eeh_pe_state_clear(struct eeh_pe *pe, int state); -struct device_node *eeh_find_device_pe(struct device_node *dn); void eeh_sysfs_add_device(struct pci_dev *pdev); void eeh_sysfs_remove_device(struct pci_dev *pdev); diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c index c527c46..341ba1a 100644 --- a/arch/powerpc/platforms/pseries/eeh.c +++ b/arch/powerpc/platforms/pseries/eeh.c @@ -264,21 +264,6 @@ static inline unsigned long eeh_token_to_phys(unsigned long token) } /** - * eeh_find_device_pe - Retrieve the PE for the given device - * @dn: device node - * - * Return the PE under which this device lies - */ -struct device_node *eeh_find_device_pe(struct device_node *dn) -{ - while (dn->parent && of_node_to_eeh_dev(dn->parent) && - (of_node_to_eeh_dev(dn->parent)->mode & EEH_MODE_SUPPORTED)) { - dn = dn->parent; - } - return dn; -} - -/** * eeh_dn_check_failure - Check if all 1's data is due to EEH slot freeze * @dn: device node * @dev: pci device, if known @@ -297,6 +282,7 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev) { int ret; unsigned long flags; + struct eeh_pe *pe; struct eeh_dev *edev; int rc = 0; const char *location; @@ -306,23 +292,26 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev) if (!eeh_subsystem_enabled) return 0; - if (!dn) { + if (dn) { + edev = of_node_to_eeh_dev(dn); + } else if (dev) { + edev = pci_dev_to_eeh_dev(dev); + dn = pci_device_to_OF_node(dev); + } else { eeh_stats.no_dn++; return 0; } - dn = eeh_find_device_pe(dn); - edev = of_node_to_eeh_dev(dn); + pe = edev->pe; /* Access to IO BARs might get this far and still not want checking. */ - if (!(edev->mode & EEH_MODE_SUPPORTED) || - edev->mode & EEH_MODE_NOCHECK) { + if (!pe) { eeh_stats.ignored_check++; - pr_debug("EEH: Ignored check (%x) for %s %s\n", - edev->mode, eeh_pci_name(dev), dn->full_name); + pr_debug("EEH: Ignored check for %s %s\n", + eeh_pci_name(dev), dn->full_name); return 0; } - if (!edev->config_addr && !edev->pe_config_addr) { + if (!pe->addr && !pe->config_addr) { eeh_stats.no_cfg_addr++; return 0; } @@ -335,13 +324,13 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev) */ raw_spin_lock_irqsave(&confirm_error_lock, flags); rc = 1; - if (edev->mode & EEH_MODE_ISOLATED) { - edev->check_count++; - if (edev->check_count % EEH_MAX_FAILS == 0) { + if (pe->state & EEH_PE_ISOLATED) { + pe->check_count++; + if (pe->check_count % EEH_MAX_FAILS == 0) { location = of_get_property(dn, "ibm,loc-code", NULL); printk(KERN_ERR "EEH: %d reads ignored for recovering device at " "location=%s driver=%s pci addr=%s\n", - edev->check_count, location, + pe->check_count, location, eeh_driver_name(dev), eeh_pci_name(dev)); printk(KERN_ERR "EEH: Might be infinite loop in %s driver\n", eeh_driver_name(dev)); @@ -357,7 +346,7 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev) * function zero of a multi-function device. * In any case they must share a common PHB.