X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=blobdiff_plain;f=arch%2Fpowerpc%2Fplatforms%2Fpseries%2Feeh.c;h=da6e5362e7cd8f13f802729e957538cc491e41b3;hp=32eaddfa5470a635741228ada3365e4b9f20b5de;hb=b361735043e3001eadb1d40916fd1a4fca1a9363;hpb=9707b27100a48950f1e15e08a7c5028786e47f55 diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c index 32eaddfa5470..da6e5362e7cd 100644 --- a/arch/powerpc/platforms/pseries/eeh.c +++ b/arch/powerpc/platforms/pseries/eeh.c @@ -225,6 +225,7 @@ static void __eeh_mark_slot (struct device_node *dn, int mode_flag) void eeh_mark_slot (struct device_node *dn, int mode_flag) { + struct pci_dev *dev; dn = find_device_pe (dn); /* Back up one, since config addrs might be shared */ @@ -232,6 +233,12 @@ void eeh_mark_slot (struct device_node *dn, int mode_flag) dn = dn->parent; PCI_DN(dn)->eeh_mode |= mode_flag; + + /* Mark the pci device too */ + dev = PCI_DN(dn)->pcidev; + if (dev) + dev->error_state = pci_channel_io_frozen; + __eeh_mark_slot (dn->child, mode_flag); } @@ -330,6 +337,7 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev) printk (KERN_ERR "EEH: Device driver ignored %d bad reads, panicing\n", pdn->eeh_check_count); dump_stack(); + msleep(5000); /* re-read the slot reset state */ if (read_slot_reset_state(pdn, rets) != 0) @@ -449,7 +457,11 @@ EXPORT_SYMBOL(eeh_check_failure); /* ------------------------------------------------------------- */ /* The code below deals with error recovery */ -/** Return negative value if a permanent error, else return +/** + * eeh_slot_availability - returns error status of slot + * @pdn pci device node + * + * Return negative value if a permanent error, else return * a number of milliseconds to wait until the PCI slot is * ready to be used. */ @@ -474,11 +486,42 @@ eeh_slot_availability(struct pci_dn *pdn) printk (KERN_ERR "EEH: Slot unavailable: rc=%d, rets=%d %d %d\n", rc, rets[0], rets[1], rets[2]); - return -1; + return -2; } -/** rtas_pci_slot_reset raises/lowers the pci #RST line - * state: 1/0 to raise/lower the #RST +/** + * rtas_pci_enable - enable MMIO or DMA transfers for this slot + * @pdn pci device node + */ + +int +rtas_pci_enable(struct pci_dn *pdn, int function) +{ + int config_addr; + int rc; + + /* Use PE configuration address, if present */ + config_addr = pdn->eeh_config_addr; + if (pdn->eeh_pe_config_addr) + config_addr = pdn->eeh_pe_config_addr; + + rc = rtas_call(ibm_set_eeh_option, 4, 1, NULL, + config_addr, + BUID_HI(pdn->phb->buid), + BUID_LO(pdn->phb->buid), + function); + + if (rc) + printk(KERN_WARNING "EEH: Cannot enable function %d, err=%d dn=%s\n", + function, rc, pdn->node->full_name); + + return rc; +} + +/** + * rtas_pci_slot_reset - raises/lowers the pci #RST line + * @pdn pci device node + * @state: 1/0 to raise/lower the #RST * * Clear the EEH-frozen condition on a slot. This routine * asserts the PCI #RST line if the 'state' argument is '1', @@ -511,24 +554,21 @@ rtas_pci_slot_reset(struct pci_dn *pdn, int state) BUID_HI(pdn->phb->buid), BUID_LO(pdn->phb->buid), state); - if (rc) { - printk (KERN_WARNING "EEH: Unable to reset the failed slot, (%d) #RST=%d dn=%s\n", + if (rc) + printk (KERN_WARNING "EEH: Unable to reset the failed slot," + " (%d) #RST=%d dn=%s\n", rc, state, pdn->node->full_name); - return; - } } -/** rtas_set_slot_reset -- assert the pci #RST line for 1/4 second - * dn -- device node to be reset. +/** + * rtas_set_slot_reset -- assert the pci #RST line for 1/4 second + * @pdn: pci device node to be reset. * * Return 0 if success, else a non-zero value. */ -int -rtas_set_slot_reset(struct pci_dn *pdn) +static void __rtas_set_slot_reset(struct pci_dn *pdn) { - int i, rc; - rtas_pci_slot_reset (pdn, 1); /* The PCI bus requires that the reset be held high for at least @@ -549,17 +589,33 @@ rtas_set_slot_reset(struct pci_dn *pdn) * up traffic. */ #define PCI_BUS_SETTLE_TIME_MSEC 1800 msleep (PCI_BUS_SETTLE_TIME_MSEC); +} + +int rtas_set_slot_reset(struct pci_dn *pdn) +{ + int i, rc; + + __rtas_set_slot_reset(pdn); /* Now double check with the firmware to make sure the device is * ready to be used; if not, wait for recovery. */ for (i=0; i<10; i++) { rc = eeh_slot_availability (pdn); - if (rc < 0) - printk (KERN_ERR "EEH: failed (%d) to reset slot %s\n", rc, pdn->node->full_name); if (rc == 0) return 0; - if (rc < 0) + + if (rc == -2) { + printk (KERN_ERR "EEH: failed (%d) to reset slot %s\n", + i, pdn->node->full_name); + __rtas_set_slot_reset(pdn); + continue; + } + + if (rc < 0) { + printk (KERN_ERR "EEH: unrecoverable slot failure %s\n", + pdn->node->full_name); return -1; + } msleep (rc+100); } @@ -582,6 +638,8 @@ rtas_set_slot_reset(struct pci_dn *pdn) /** * __restore_bars - Restore the Base Address Registers + * @pdn: pci device node + * * Loads the PCI configuration space base address registers, * the expansion ROM base address, the latency timer, and etc. * from the saved values in the device node. @@ -691,11 +749,11 @@ static void *early_enable_eeh(struct device_node *dn, void *data) { struct eeh_early_enable_info *info = data; int ret; - char *status = get_property(dn, "status", NULL); - u32 *class_code = (u32 *)get_property(dn, "class-code", NULL); - u32 *vendor_id = (u32 *)get_property(dn, "vendor-id", NULL); - u32 *device_id = (u32 *)get_property(dn, "device-id", NULL); - u32 *regs; + const char *status = get_property(dn, "status", NULL); + const u32 *class_code = get_property(dn, "class-code", NULL); + const u32 *vendor_id = get_property(dn, "vendor-id", NULL); + const u32 *device_id = get_property(dn, "device-id", NULL); + const u32 *regs; int enable; struct pci_dn *pdn = PCI_DN(dn); @@ -737,7 +795,7 @@ static void *early_enable_eeh(struct device_node *dn, void *data) /* Ok... see if this device supports EEH. Some do, some don't, * and the only way to find out is to check each and every one. */ - regs = (u32 *)get_property(dn, "reg", NULL); + regs = get_property(dn, "reg", NULL); if (regs) { /* First register entry is addr (00BBSS00) */ /* Try to enable eeh */