1. Add pci_enable_sriov_with_override to allow
enabling sriov with a driver override
on the VFs.
2. Expose pci_iov_set_numvfs and pci_iov_resource_size
to make them available for other modules
Signed-off-by: Ilya Lesokhin <ilyal@xxxxxxxxxxxx>
Signed-off-by: Noa Osherovich <noaos@xxxxxxxxxxxx>
Signed-off-by: Haggai Eran <haggaie@xxxxxxxxxxxx>
---
drivers/pci/iov.c | 41 +++++++++++++++++++++++++++++++++--------
include/linux/pci.h | 13 ++++++++++++-
2 files changed, 45 insertions(+), 9 deletions(-)
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index 2194b44..5ffd926 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -41,7 +41,7 @@ int pci_iov_virtfn_devfn(struct pci_dev *dev, int vf_id)
*
* Update iov->offset and iov->stride when NumVFs is written.
*/
-static inline void pci_iov_set_numvfs(struct pci_dev *dev, int nr_virtfn)
+void pci_iov_set_numvfs(struct pci_dev *dev, int nr_virtfn)
{
struct pci_sriov *iov = dev->sriov;
@@ -49,6 +49,7 @@ static inline void pci_iov_set_numvfs(struct pci_dev *dev, int nr_virtfn)
pci_read_config_word(dev, iov->pos + PCI_SRIOV_VF_OFFSET, &iov->offset);
pci_read_config_word(dev, iov->pos + PCI_SRIOV_VF_STRIDE, &iov->stride);
}
+EXPORT_SYMBOL(pci_iov_set_numvfs);
/*
* The PF consumes one bus number. NumVFs, First VF Offset, and VF Stride
@@ -112,8 +113,10 @@ resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno)
return dev->sriov->barsz[resno - PCI_IOV_RESOURCES];
}
+EXPORT_SYMBOL(pci_iov_resource_size);
-int pci_iov_add_virtfn(struct pci_dev *dev, int id, int reset)
+int pci_iov_add_virtfn(struct pci_dev *dev, int id, int reset,
+ char *driver_override)
{
int i;
int rc = -ENOMEM;
@@ -154,14 +157,20 @@ int pci_iov_add_virtfn(struct pci_dev *dev, int id, int reset)
rc = request_resource(res, &virtfn->resource[i]);
BUG_ON(rc);
}
-
if (reset)
__pci_reset_function(virtfn);
pci_device_add(virtfn, virtfn->bus);
mutex_unlock(&iov->dev->sriov->lock);
+ if (driver_override) {
+ virtfn->driver_override = kstrdup(driver_override, GFP_KERNEL);
+ if (!virtfn->driver_override)
+ goto failed1;
+ }
+
pci_bus_add_device(virtfn);
+
sprintf(buf, "virtfn%u", id);
rc = sysfs_create_link(&dev->dev.kobj, &virtfn->dev.kobj, buf);
if (rc)
@@ -235,7 +244,8 @@ int __weak pcibios_sriov_disable(struct pci_dev *pdev)
return 0;
}
-static int sriov_enable(struct pci_dev *dev, int nr_virtfn)
+static int sriov_enable(struct pci_dev *dev, int nr_virtfn,
+ char *driver_override)
{
int rc;
int i;
@@ -321,7 +331,7 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn)
}
for (i = 0; i < initial; i++) {
- rc = pci_iov_add_virtfn(dev, i, 0);
+ rc = pci_iov_add_virtfn(dev, i, 0, driver_override);
if (rc)
goto failed;
}
@@ -622,20 +632,35 @@ int pci_iov_bus_range(struct pci_bus *bus)
}
/**
- * pci_enable_sriov - enable the SR-IOV capability
+ * pci_enable_sriov_with_override - enable the SR-IOV capability
* @dev: the PCI device
* @nr_virtfn: number of virtual functions to enable
+ * driver_override: driver override for VFs
*
* Returns 0 on success, or negative on failure.
*/
-int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
+int pci_enable_sriov_with_override(struct pci_dev *dev, int nr_virtfn,
+ char *driver_override)
{
might_sleep();
if (!dev->is_physfn)
return -ENOSYS;
- return sriov_enable(dev, nr_virtfn);
+ return sriov_enable(dev, nr_virtfn, driver_override);
+}
+EXPORT_SYMBOL_GPL(pci_enable_sriov_with_override);
+
+/**
+ * pci_enable_sriov - enable the SR-IOV capability
+ * @dev: the PCI device
+ * @nr_virtfn: number of virtual functions to enable
+ *
+ * Returns 0 on success, or negative on failure.
+ */
+int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
+{
+ return pci_enable_sriov_with_override(dev, nr_virtfn, NULL);
}
EXPORT_SYMBOL_GPL(pci_enable_sriov);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index b67e4df..54b3059 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1739,15 +1739,20 @@ void __iomem *pci_ioremap_wc_bar(struct pci_dev *pdev, int bar);
int pci_iov_virtfn_bus(struct pci_dev *dev, int id);
int pci_iov_virtfn_devfn(struct pci_dev *dev, int id);
+int pci_enable_sriov_with_override(struct pci_dev *dev, int nr_virtfn,
+ char *driver_override);
int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
void pci_disable_sriov(struct pci_dev *dev);
-int pci_iov_add_virtfn(struct pci_dev *dev, int id, int reset);
+int pci_iov_add_virtfn(struct pci_dev *dev, int id, int reset,
+ char *driver_override);
void pci_iov_remove_virtfn(struct pci_dev *dev, int id, int reset);
int pci_num_vf(struct pci_dev *dev);
int pci_vfs_assigned(struct pci_dev *dev);
int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs);
int pci_sriov_get_totalvfs(struct pci_dev *dev);
resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno);
+
+void pci_iov_set_numvfs(struct pci_dev *dev, int nr_virtfn);
#else
static inline int pci_iov_virtfn_bus(struct pci_dev *dev, int id)
{
@@ -1757,6 +1762,11 @@ static inline int pci_iov_virtfn_devfn(struct pci_dev *dev, int id)
{
return -ENOSYS;
}
+
+static inline int pci_enable_sriov_with_override(struct pci_dev *dev,
+ int nr_virtfn,
+ char *driver_override)
+{ return -ENODEV; }
static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
{ return -ENODEV; }
static inline int pci_iov_add_virtfn(struct pci_dev *dev, int id, int reset)
@@ -1775,6 +1785,7 @@ static inline int pci_sriov_get_totalvfs(struct pci_dev *dev)
{ return 0; }
static inline resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno)
{ return 0; }
+static inline void pci_iov_set_numvfs(struct pci_dev *dev, int nr_virtfn) { }
#endif
#if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
--
1.8.3.1
--
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