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powerpc/eeh: I/O chip PE log and bridge setup

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The patch adds backends to retrieve error log and configure p2p
bridges for the indicated PE.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Gavin Shan 2013-06-20 13:21:11 +08:00 committed by Benjamin Herrenschmidt
parent 9d5cab0010
commit bf90dfea23
1 changed files with 55 additions and 2 deletions
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57
arch/powerpc/platforms/powernv/eeh-ioda.c
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@ -445,12 +445,65 @@ static int ioda_eeh_reset(struct eeh_pe *pe, int option)
return ret;
}
/**
* ioda_eeh_get_log - Retrieve error log
* @pe: EEH PE
* @severity: Severity level of the log
* @drv_log: buffer to store the log
* @len: space of the log buffer
*
* The function is used to retrieve error log from P7IOC.
*/
static int ioda_eeh_get_log(struct eeh_pe *pe, int severity,
char *drv_log, unsigned long len)
{
s64 ret;
unsigned long flags;
struct pci_controller *hose = pe->phb;
struct pnv_phb *phb = hose->private_data;
spin_lock_irqsave(&phb->lock, flags);
ret = opal_pci_get_phb_diag_data2(phb->opal_id,
phb->diag.blob, PNV_PCI_DIAG_BUF_SIZE);
if (ret) {
spin_unlock_irqrestore(&phb->lock, flags);
pr_warning("%s: Failed to get log for PHB#%x-PE#%x\n",
__func__, hose->global_number, pe->addr);
return -EIO;
}
/*
* FIXME: We probably need log the error in somewhere.
* Lets make it up in future.
*/
/* pr_info("%s", phb->diag.blob); */
spin_unlock_irqrestore(&phb->lock, flags);
return 0;
}
/**
* ioda_eeh_configure_bridge - Configure the PCI bridges for the indicated PE
* @pe: EEH PE
*
* For particular PE, it might have included PCI bridges. In order
* to make the PE work properly, those PCI bridges should be configured
* correctly. However, we need do nothing on P7IOC since the reset
* function will do everything that should be covered by the function.
*/
static int ioda_eeh_configure_bridge(struct eeh_pe *pe)
{
return 0;
}
struct pnv_eeh_ops ioda_eeh_ops = {
.post_init = ioda_eeh_post_init,
.set_option = ioda_eeh_set_option,
.get_state = ioda_eeh_get_state,
.reset = ioda_eeh_reset,
.get_log = NULL,
.configure_bridge = NULL,
.get_log = ioda_eeh_get_log,
.configure_bridge = ioda_eeh_configure_bridge,
.next_error = NULL
};