From: Gavin Shan <shangw@linux.vnet.ibm.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: Gavin Shan <shangw@linux.vnet.ibm.com>
Subject: [PATCH 14/27] powerpc/eeh: I/O chip EEH enable option
Date: Sat, 15 Jun 2013 17:03:05 +0800 [thread overview]
Message-ID: <1371286998-2842-15-git-send-email-shangw@linux.vnet.ibm.com> (raw)
In-Reply-To: <1371286998-2842-1-git-send-email-shangw@linux.vnet.ibm.com>
The patch adds the backend to enable or disable EEH functionality
for the specified PE. The backend is also used to enable MMIO or
DMA path for the problematic PE. It's notable that all PEs on
PowerNV platform support EEH functionality by default, and we
disallow to disable EEH for the specific PE.
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
---
arch/powerpc/platforms/powernv/eeh-ioda.c | 65 ++++++++++++++++++++++++++++-
1 files changed, 64 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/eeh-ioda.c b/arch/powerpc/platforms/powernv/eeh-ioda.c
index 60ac8fe..b77e90e 100644
--- a/arch/powerpc/platforms/powernv/eeh-ioda.c
+++ b/arch/powerpc/platforms/powernv/eeh-ioda.c
@@ -53,9 +53,72 @@ static int ioda_eeh_post_init(struct pci_controller *hose)
return 0;
}
+/**
+ * ioda_eeh_set_option - Set EEH operation or I/O setting
+ * @pe: EEH PE
+ * @option: options
+ *
+ * Enable or disable EEH option for the indicated PE. The
+ * function also can be used to enable I/O or DMA for the
+ * PE.
+ */
+static int ioda_eeh_set_option(struct eeh_pe *pe, int option)
+{
+ s64 ret;
+ u32 pe_no;
+ struct pci_controller *hose = pe->phb;
+ struct pnv_phb *phb = hose->private_data;
+
+ /* Check on PE number */
+ if (pe->addr < 0 || pe->addr >= phb->ioda.total_pe) {
+ pr_err("%s: PE address %x out of range [0, %x] "
+ "on PHB#%x\n",
+ __func__, pe->addr, phb->ioda.total_pe,
+ hose->global_number);
+ return -EINVAL;
+ }
+
+ pe_no = pe->addr;
+ switch (option) {
+ case EEH_OPT_DISABLE:
+ ret = -EEXIST;
+ break;
+ case EEH_OPT_ENABLE:
+ ret = 0;
+ break;
+ case EEH_OPT_THAW_MMIO:
+ ret = opal_pci_eeh_freeze_clear(phb->opal_id, pe_no,
+ OPAL_EEH_ACTION_CLEAR_FREEZE_MMIO);
+ if (ret) {
+ pr_warning("%s: Failed to enable MMIO for "
+ "PHB#%x-PE#%x, err=%lld\n",
+ __func__, hose->global_number, pe_no, ret);
+ return -EIO;
+ }
+
+ break;
+ case EEH_OPT_THAW_DMA:
+ ret = opal_pci_eeh_freeze_clear(phb->opal_id, pe_no,
+ OPAL_EEH_ACTION_CLEAR_FREEZE_DMA);
+ if (ret) {
+ pr_warning("%s: Failed to enable DMA for "
+ "PHB#%x-PE#%x, err=%lld\n",
+ __func__, hose->global_number, pe_no, ret);
+ return -EIO;
+ }
+
+ break;
+ default:
+ pr_warning("%s: Invalid option %d\n", __func__, option);
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
struct pnv_eeh_ops ioda_eeh_ops = {
.post_init = ioda_eeh_post_init,
- .set_option = NULL,
+ .set_option = ioda_eeh_set_option,
.get_state = NULL,
.reset = NULL,
.get_log = NULL,
--
1.7.5.4
next prev parent reply other threads:[~2013-06-15 9:03 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-15 9:02 [PATCH v4 00/27] EEH Support for PowerNV platform Gavin Shan
2013-06-15 9:02 ` [PATCH 01/27] powerpc/eeh: Move common part to kernel directory Gavin Shan
2013-06-17 3:03 ` Mike Qiu
2013-06-18 0:55 ` Gavin Shan
2013-06-15 9:02 ` [PATCH 02/27] powerpc/eeh: Cleanup for EEH core Gavin Shan
2013-06-15 9:02 ` [PATCH 03/27] powerpc/eeh: Make eeh_phb_pe_get() public Gavin Shan
2013-06-15 9:02 ` [PATCH 04/27] powerpc/eeh: Make eeh_pe_get() public Gavin Shan
2013-06-15 9:02 ` [PATCH 05/27] powerpc/eeh: Trace PCI bus from PE Gavin Shan
2013-06-15 9:02 ` [PATCH 06/27] powerpc/eeh: Make eeh_init() public Gavin Shan
2013-06-15 9:02 ` [PATCH 07/27] powerpc/eeh: EEH post initialization operation Gavin Shan
2013-06-15 9:02 ` [PATCH 08/27] powerpc/eeh: Refactor eeh_reset_pe_once() Gavin Shan
2013-06-15 9:03 ` [PATCH 09/27] powerpc/eeh: Delay EEH probe during hotplug Gavin Shan
2013-06-15 9:03 ` [PATCH 10/27] powerpc/eeh: Export confirm_error_lock Gavin Shan
2013-06-15 9:03 ` [PATCH 11/27] powerpc/eeh: Sync OPAL API with firmware Gavin Shan
2013-06-15 9:03 ` [PATCH 12/27] powerpc/eeh: EEH backend for P7IOC Gavin Shan
2013-06-15 9:03 ` [PATCH 13/27] powerpc/eeh: I/O chip post initialization Gavin Shan
2013-06-15 9:03 ` Gavin Shan [this message]
2013-06-15 9:03 ` [PATCH 15/27] powerpc/eeh: I/O chip EEH state retrieval Gavin Shan
2013-06-15 9:03 ` [PATCH 16/27] powerpc/eeh: I/O chip PE reset Gavin Shan
2013-06-15 9:03 ` [PATCH 17/27] powerpc/eeh: I/O chip PE log and bridge setup Gavin Shan
2013-06-15 9:03 ` [PATCH 18/27] powerpc/eeh: PowerNV EEH backends Gavin Shan
2013-06-15 9:03 ` [PATCH 19/27] powerpc/eeh: Initialization for PowerNV Gavin Shan
2013-06-15 9:03 ` [PATCH 20/27] powerpc/eeh: Enable EEH check for config access Gavin Shan
2013-06-15 9:03 ` [PATCH 21/27] powerpc/eeh: Process interrupts caused by EEH Gavin Shan
2013-06-16 5:12 ` Benjamin Herrenschmidt
2013-06-16 7:27 ` Gavin Shan
2013-06-16 8:37 ` Benjamin Herrenschmidt
2013-06-15 9:03 ` [PATCH 22/27] powerpc/eeh: Allow to check fenced PHB proactively Gavin Shan
2013-06-15 9:03 ` [PATCH 23/27] powernv/opal: Notifier for OPAL events Gavin Shan
2013-06-15 9:03 ` [PATCH 24/27] powernv/opal: Disable OPAL notifier upon poweroff Gavin Shan
2013-06-15 9:03 ` [PATCH 25/27] powerpc/eeh: Register OPAL notifier for PCI error Gavin Shan
2013-06-15 9:03 ` [PATCH 26/27] powerpc/powernv: Debugfs directory for PHB Gavin Shan
2013-06-15 9:03 ` [PATCH 27/27] powerpc/eeh: Debugfs for error injection Gavin Shan
-- strict thread matches above, loose matches on Subject: below --
2013-06-05 7:34 [PATCH v3 00/27] EEH Support for PowerNV platform Gavin Shan
2013-06-05 7:34 ` [PATCH 14/27] powerpc/eeh: I/O chip EEH enable option Gavin Shan
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