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Date: Mon, 05 Mar 2012 10:00:49 +0000
From: Tadeusz Struk <tadeusz.struk@...el.com>
To: bhelgaas@...gle.com, jbarnes@...tuousgeek.org
Cc: linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
linux-pci@...r.kernel.org, tadeusz.struk@...el.com
Subject: [PATCH 1/1 v3] PCI: Device specific reset function
---
drivers/pci/pci.h | 1 +
drivers/pci/quirks.c | 33 +++++++++++++++++++++++++++------
include/linux/pci.h | 1 +
3 files changed, 29 insertions(+), 6 deletions(-)
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 1009a5e..4d10479 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -315,6 +315,7 @@ struct pci_dev_reset_methods {
u16 vendor;
u16 device;
int (*reset)(struct pci_dev *dev, int probe);
+ struct list_head list;
};
#ifdef CONFIG_PCI_QUIRKS
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 6476547..f423d2f 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3070,26 +3070,47 @@ static int reset_intel_82599_sfp_virtfn(struct pci_dev *dev, int probe)
}
#define PCI_DEVICE_ID_INTEL_82599_SFP_VF 0x10ed
-
-static const struct pci_dev_reset_methods pci_dev_reset_methods[] = {
+static struct pci_dev_reset_methods pci_dev_reset_methods[] = {
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82599_SFP_VF,
- reset_intel_82599_sfp_virtfn },
+ reset_intel_82599_sfp_virtfn },
{ PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
reset_intel_generic_dev },
- { 0 }
};
+static LIST_HEAD(reset_list);
+
+void pci_dev_specific_reset_add(struct pci_dev_reset_methods *reset_method)
+{
+ INIT_LIST_HEAD(&reset_method->list);
+ list_add(&reset_method->list, &reset_list);
+}
+
+static int __init pci_dev_specific_reset_init(void)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(pci_dev_reset_methods); i++) {
+ pci_dev_specific_reset_add(&pci_dev_reset_methods[i]);
+ }
+ return 0;
+}
+
+late_initcall(pci_dev_specific_reset_init);
+
int pci_dev_specific_reset(struct pci_dev *dev, int probe)
{
const struct pci_dev_reset_methods *i;
+ struct pci_driver *drv = dev->driver;
+
+ if (drv && drv->reset)
+ return drv->reset(dev, probe);
- for (i = pci_dev_reset_methods; i->reset; i++) {
+ list_for_each_entry(i, &reset_list, list) {
if ((i->vendor == dev->vendor ||
i->vendor == (u16)PCI_ANY_ID) &&
(i->device == dev->device ||
i->device == (u16)PCI_ANY_ID))
return i->reset(dev, probe);
}
-
return -ENOTTY;
}
diff --git a/include/linux/pci.h b/include/linux/pci.h
index a16b1df..a3a0bc5 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -560,6 +560,7 @@ struct pci_driver {
int (*resume_early) (struct pci_dev *dev);
int (*resume) (struct pci_dev *dev); /* Device woken up */
void (*shutdown) (struct pci_dev *dev);
+ int (*reset) (struct pci_dev *dev, int probe); /* Device specific reset */
struct pci_error_handlers *err_handler;
struct device_driver driver;
struct pci_dynids dynids;
--
1.7.7.6
--------------------------------------------------------------
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