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[POWERPC] Assorted janitorial EEH cleanups

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Assorted minor cleanups to EEH code; -- use literals, use
kerneldoc format.

Signed-off-by: Linas Vepstas <linas@austin.ibm.com>

----
 arch/powerpc/platforms/pseries/eeh.c        |   13 ++++++++++---
 arch/powerpc/platforms/pseries/eeh_driver.c |    7 ++++---
 include/asm-powerpc/ppc-pci.h               |   18 +++++++++++++++---
 3 files changed, 29 insertions(+), 9 deletions(-)
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Linas Vepstas 2007-05-10 02:38:11 +10:00 committed by Paul Mackerras
parent 979ee32f7f
commit 17213c3bf6
3 changed files with 29 additions and 9 deletions
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13
arch/powerpc/platforms/pseries/eeh.c
View file

@ -76,7 +76,7 @@
*/
#define EEH_MAX_FAILS 2100000
/* Time to wait for a PCI slot to retport status, in milliseconds */
/* Time to wait for a PCI slot to report status, in milliseconds */
#define PCI_BUS_RESET_WAIT_MSEC (60*1000)
/* RTAS tokens */
@ -95,11 +95,18 @@ EXPORT_SYMBOL(eeh_subsystem_enabled);
/* Lock to avoid races due to multiple reports of an error */
static DEFINE_SPINLOCK(confirm_error_lock);
/* Buffer for reporting slot-error-detail rtas calls */
/* Buffer for reporting slot-error-detail rtas calls. Its here
* in BSS, and not dynamically alloced, so that it ends up in
* RMO where RTAS can access it.
*/
static unsigned char slot_errbuf[RTAS_ERROR_LOG_MAX];
static DEFINE_SPINLOCK(slot_errbuf_lock);
static int eeh_error_buf_size;
/* Buffer for reporting pci register dumps. Its here in BSS, and
* not dynamically alloced, so that it ends up in RMO where RTAS
* can access it.
*/
#define EEH_PCI_REGS_LOG_LEN 4096
static unsigned char pci_regs_buf[EEH_PCI_REGS_LOG_LEN];
@ -218,7 +225,7 @@ static size_t gather_pci_data(struct pci_dn *pdn, char * buf, size_t len)
void eeh_slot_error_detail(struct pci_dn *pdn, int severity)
{
size_t loglen = 0;
memset(pci_regs_buf, 0, EEH_PCI_REGS_LOG_LEN);
pci_regs_buf[0] = 0;
rtas_pci_enable(pdn, EEH_THAW_MMIO);
loglen = gather_pci_data(pdn, pci_regs_buf, EEH_PCI_REGS_LOG_LEN);

7
arch/powerpc/platforms/pseries/eeh_driver.c
View file

@ -378,8 +378,9 @@ struct pci_dn * handle_eeh_events (struct eeh_event *event)
/* Since rtas may enable MMIO when posting the error log,
* don't post the error log until after all dev drivers
* have been informed. */
eeh_slot_error_detail(frozen_pdn, 1 /* Temporary Error */);
* have been informed.
*/
eeh_slot_error_detail(frozen_pdn, EEH_LOG_TEMP_FAILURE);
/* If all device drivers were EEH-unaware, then shut
* down all of the device drivers, and hope they
@ -470,7 +471,7 @@ struct pci_dn * handle_eeh_events (struct eeh_event *event)
location, drv_str, pci_str);
perm_error:
eeh_slot_error_detail(frozen_pdn, 2 /* Permanent Error */);
eeh_slot_error_detail(frozen_pdn, EEH_LOG_PERM_FAILURE);
/* Notify all devices that they're about to go down. */
pci_walk_bus(frozen_bus, eeh_report_failure, NULL);

18
include/asm-powerpc/ppc-pci.h
View file

@ -62,11 +62,14 @@ struct pci_dev *pci_get_device_by_addr(unsigned long addr);
/**
* eeh_slot_error_detail -- record and EEH error condition to the log
* @severity: 1 if temporary, 2 if permanent failure.
* @pdn: pci device node
* @severity: EEH_LOG_TEMP_FAILURE or EEH_LOG_PERM_FAILURE
*
* Obtains the EEH error details from the RTAS subsystem,
* and then logs these details with the RTAS error log system.
*/
#define EEH_LOG_TEMP_FAILURE 1
#define EEH_LOG_PERM_FAILURE 2
void eeh_slot_error_detail (struct pci_dn *pdn, int severity);
/**
@ -82,6 +85,7 @@ int rtas_pci_enable(struct pci_dn *pdn, int function);
/**
* rtas_set_slot_reset -- unfreeze a frozen slot
* @pdn: pci device node
*
* Clear the EEH-frozen condition on a slot. This routine
* does this by asserting the PCI #RST line for 1/8th of
@ -95,6 +99,7 @@ int eeh_wait_for_slot_status(struct pci_dn *pdn, int max_wait_msecs);
/**
* eeh_restore_bars - Restore device configuration info.
* @pdn: pci device node
*
* A reset of a PCI device will clear out its config space.
* This routines will restore the config space for this
@ -105,6 +110,7 @@ void eeh_restore_bars(struct pci_dn *);
/**
* rtas_configure_bridge -- firmware initialization of pci bridge
* @pdn: pci device node
*
* Ask the firmware to configure all PCI bridges devices
* located behind the indicated node. Required after a
@ -118,16 +124,22 @@ 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);
/**
* eeh_mark_slot -- set mode flags for pertition endpoint
* @pdn: pci device node
*
* mark and clear slots: find "partition endpoint" PE and set or
* clear the flags for each subnode of the PE.
*/
void eeh_mark_slot (struct device_node *dn, int mode_flag);
void eeh_clear_slot (struct device_node *dn, int mode_flag);
/* Find the associated "Partiationable Endpoint" PE */
/**
* find_device_pe -- Find the associated "Partiationable Endpoint" PE
* @pdn: pci device node
*/
struct device_node * find_device_pe(struct device_node *dn);
#endif
#endif /* CONFIG_EEH */
#else /* CONFIG_PCI */
static inline void find_and_init_phbs(void) { }