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path: root/drivers/pci/iov.c
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Diffstat (limited to 'drivers/pci/iov.c')
-rw-r--r--drivers/pci/iov.c150
1 files changed, 8 insertions, 142 deletions
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index 42fae47..1969a3e 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -11,6 +11,7 @@
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/mutex.h>
+#include <linux/export.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/pci-ats.h>
@@ -282,6 +283,7 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn)
struct resource *res;
struct pci_dev *pdev;
struct pci_sriov *iov = dev->sriov;
+ int bars = 0;
if (!nr_virtfn)
return 0;
@@ -306,6 +308,7 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn)
nres = 0;
for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
+ bars |= (1 << (i + PCI_IOV_RESOURCES));
res = dev->resource + PCI_IOV_RESOURCES + i;
if (res->parent)
nres++;
@@ -323,6 +326,11 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn)
return -ENOMEM;
}
+ if (pci_enable_resources(dev, bars)) {
+ dev_err(&dev->dev, "SR-IOV: IOV BARS not allocated\n");
+ return -ENOMEM;
+ }
+
if (iov->link != dev->devfn) {
pdev = pci_get_slot(dev->bus, iov->link);
if (!pdev)
@@ -722,145 +730,3 @@ int pci_num_vf(struct pci_dev *dev)
return dev->sriov->nr_virtfn;
}
EXPORT_SYMBOL_GPL(pci_num_vf);
-
-static int ats_alloc_one(struct pci_dev *dev, int ps)
-{
- int pos;
- u16 cap;
- struct pci_ats *ats;
-
- pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ATS);
- if (!pos)
- return -ENODEV;
-
- ats = kzalloc(sizeof(*ats), GFP_KERNEL);
- if (!ats)
- return -ENOMEM;
-
- ats->pos = pos;
- ats->stu = ps;
- pci_read_config_word(dev, pos + PCI_ATS_CAP, &cap);
- ats->qdep = PCI_ATS_CAP_QDEP(cap) ? PCI_ATS_CAP_QDEP(cap) :
- PCI_ATS_MAX_QDEP;
- dev->ats = ats;
-
- return 0;
-}
-
-static void ats_free_one(struct pci_dev *dev)
-{
- kfree(dev->ats);
- dev->ats = NULL;
-}
-
-/**
- * pci_enable_ats - enable the ATS capability
- * @dev: the PCI device
- * @ps: the IOMMU page shift
- *
- * Returns 0 on success, or negative on failure.
- */
-int pci_enable_ats(struct pci_dev *dev, int ps)
-{
- int rc;
- u16 ctrl;
-
- BUG_ON(dev->ats && dev->ats->is_enabled);
-
- if (ps < PCI_ATS_MIN_STU)
- return -EINVAL;
-
- if (dev->is_physfn || dev->is_virtfn) {
- struct pci_dev *pdev = dev->is_physfn ? dev : dev->physfn;
-
- mutex_lock(&pdev->sriov->lock);
- if (pdev->ats)
- rc = pdev->ats->stu == ps ? 0 : -EINVAL;
- else
- rc = ats_alloc_one(pdev, ps);
-
- if (!rc)
- pdev->ats->ref_cnt++;
- mutex_unlock(&pdev->sriov->lock);
- if (rc)
- return rc;
- }
-
- if (!dev->is_physfn) {
- rc = ats_alloc_one(dev, ps);
- if (rc)
- return rc;
- }
-
- ctrl = PCI_ATS_CTRL_ENABLE;
- if (!dev->is_virtfn)
- ctrl |= PCI_ATS_CTRL_STU(ps - PCI_ATS_MIN_STU);
- pci_write_config_word(dev, dev->ats->pos + PCI_ATS_CTRL, ctrl);
-
- dev->ats->is_enabled = 1;
-
- return 0;
-}
-
-/**
- * pci_disable_ats - disable the ATS capability
- * @dev: the PCI device
- */
-void pci_disable_ats(struct pci_dev *dev)
-{
- u16 ctrl;
-
- BUG_ON(!dev->ats || !dev->ats->is_enabled);
-
- pci_read_config_word(dev, dev->ats->pos + PCI_ATS_CTRL, &ctrl);
- ctrl &= ~PCI_ATS_CTRL_ENABLE;
- pci_write_config_word(dev, dev->ats->pos + PCI_ATS_CTRL, ctrl);
-
- dev->ats->is_enabled = 0;
-
- if (dev->is_physfn || dev->is_virtfn) {
- struct pci_dev *pdev = dev->is_physfn ? dev : dev->physfn;
-
- mutex_lock(&pdev->sriov->lock);
- pdev->ats->ref_cnt--;
- if (!pdev->ats->ref_cnt)
- ats_free_one(pdev);
- mutex_unlock(&pdev->sriov->lock);
- }
-
- if (!dev->is_physfn)
- ats_free_one(dev);
-}
-
-/**
- * pci_ats_queue_depth - query the ATS Invalidate Queue Depth
- * @dev: the PCI device
- *
- * Returns the queue depth on success, or negative on failure.
- *
- * The ATS spec uses 0 in the Invalidate Queue Depth field to
- * indicate that the function can accept 32 Invalidate Request.
- * But here we use the `real' values (i.e. 1~32) for the Queue
- * Depth; and 0 indicates the function shares the Queue with
- * other functions (doesn't exclusively own a Queue).
- */
-int pci_ats_queue_depth(struct pci_dev *dev)
-{
- int pos;
- u16 cap;
-
- if (dev->is_virtfn)
- return 0;
-
- if (dev->ats)
- return dev->ats->qdep;
-
- pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ATS);
- if (!pos)
- return -ENODEV;
-
- pci_read_config_word(dev, pos + PCI_ATS_CAP, &cap);
-
- return PCI_ATS_CAP_QDEP(cap) ? PCI_ATS_CAP_QDEP(cap) :
- PCI_ATS_MAX_QDEP;
-}