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Subject[PATCH v3 02/10] vfio_pci: refine user config reference in vfio-pci module
Date
This patch adds three fields in struct vfio_pci_device to pass the user
configs of vfio-pci module to some functions which could be common in
future usage.

Cc: Kevin Tian <kevin.tian@intel.com>
Cc: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Liu Yi L <yi.l.liu@intel.com>
---
drivers/vfio/pci/vfio_pci.c | 33 ++++++++++++++++++++++++---------
drivers/vfio/pci/vfio_pci_private.h | 12 ++++++++++--
2 files changed, 34 insertions(+), 11 deletions(-)

diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index 79460c3..b04e43a 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -69,7 +69,8 @@ static unsigned int vfio_pci_set_vga_decode(void *opaque, bool single_vga)
unsigned char max_busnr;
unsigned int decodes;

- if (single_vga || !vfio_vga_disabled() || pci_is_root_bus(pdev->bus))
+ if (single_vga || !vfio_vga_disabled(vdev) ||
+ pci_is_root_bus(pdev->bus))
return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM |
VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM;

@@ -273,7 +274,7 @@ static int vfio_pci_enable(struct vfio_pci_device *vdev)
if (!vdev->pci_saved_state)
pci_dbg(pdev, "%s: Couldn't store saved state\n", __func__);

- if (likely(!nointxmask)) {
+ if (likely(!vdev->nointxmask)) {
if (vfio_pci_nointx(pdev)) {
pci_info(pdev, "Masking broken INTx support\n");
vdev->nointx = true;
@@ -310,7 +311,7 @@ static int vfio_pci_enable(struct vfio_pci_device *vdev)
} else
vdev->msix_bar = 0xFF;

- if (!vfio_vga_disabled() && vfio_pci_is_vga(pdev))
+ if (!vfio_vga_disabled(vdev) && vfio_pci_is_vga(pdev))
vdev->has_vga = true;


@@ -445,10 +446,17 @@ static void vfio_pci_disable(struct vfio_pci_device *vdev)

vfio_pci_try_bus_reset(vdev);

- if (!disable_idle_d3)
+ if (!vdev->disable_idle_d3)
vfio_pci_set_power_state(vdev, PCI_D3hot);
}

+void vfio_pci_refresh_config(struct vfio_pci_device *vdev,
+ bool nointxmask, bool disable_idle_d3)
+{
+ vdev->nointxmask = nointxmask;
+ vdev->disable_idle_d3 = disable_idle_d3;
+}
+
static void vfio_pci_release(void *device_data)
{
struct vfio_pci_device *vdev = device_data;
@@ -473,6 +481,8 @@ static int vfio_pci_open(void *device_data)
if (!try_module_get(THIS_MODULE))
return -ENODEV;

+ vfio_pci_refresh_config(vdev, nointxmask, disable_idle_d3);
+
mutex_lock(&vdev->reflck->lock);

if (!vdev->refcnt) {
@@ -1313,6 +1323,11 @@ static int vfio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
spin_lock_init(&vdev->irqlock);
mutex_init(&vdev->ioeventfds_lock);
INIT_LIST_HEAD(&vdev->ioeventfds_list);
+ vdev->nointxmask = nointxmask;
+#ifdef CONFIG_VFIO_PCI_VGA
+ vdev->disable_vga = disable_vga;
+#endif
+ vdev->disable_idle_d3 = disable_idle_d3;

ret = vfio_add_group_dev(&pdev->dev, &vfio_pci_ops, vdev);
if (ret) {
@@ -1337,7 +1352,7 @@ static int vfio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)

vfio_pci_probe_power_state(vdev);

- if (!disable_idle_d3) {
+ if (!vdev->disable_idle_d3) {
/*
* pci-core sets the device power state to an unknown value at
* bootup and after being removed from a driver. The only
@@ -1368,7 +1383,7 @@ static void vfio_pci_remove(struct pci_dev *pdev)
kfree(vdev->region);
mutex_destroy(&vdev->ioeventfds_lock);

- if (!disable_idle_d3)
+ if (!vdev->disable_idle_d3)
vfio_pci_set_power_state(vdev, PCI_D0);

kfree(vdev->pm_save);
@@ -1603,7 +1618,7 @@ static void vfio_pci_try_bus_reset(struct vfio_pci_device *vdev)
if (!ret) {
tmp->needs_reset = false;

- if (tmp != vdev && !disable_idle_d3)
+ if (tmp != vdev && !tmp->disable_idle_d3)
vfio_pci_set_power_state(tmp, PCI_D3hot);
}

@@ -1619,7 +1634,7 @@ static void __exit vfio_pci_cleanup(void)
vfio_pci_uninit_perm_bits();
}

-static void __init vfio_pci_fill_ids(void)
+static void __init vfio_pci_fill_ids(char *ids)
{
char *p, *id;
int rc;
@@ -1674,7 +1689,7 @@ static int __init vfio_pci_init(void)
if (ret)
goto out_driver;

- vfio_pci_fill_ids();
+ vfio_pci_fill_ids(ids);

return 0;

diff --git a/drivers/vfio/pci/vfio_pci_private.h b/drivers/vfio/pci/vfio_pci_private.h
index f12d92c..eae8d94 100644
--- a/drivers/vfio/pci/vfio_pci_private.h
+++ b/drivers/vfio/pci/vfio_pci_private.h
@@ -122,6 +122,11 @@ struct vfio_pci_device {
struct list_head dummy_resources_list;
struct mutex ioeventfds_lock;
struct list_head ioeventfds_list;
+ bool nointxmask;
+#ifdef CONFIG_VFIO_PCI_VGA
+ bool disable_vga;
+#endif
+ bool disable_idle_d3;
};

#define is_intx(vdev) (vdev->irq_type == VFIO_PCI_INTX_IRQ_INDEX)
@@ -135,15 +140,18 @@ static inline bool vfio_pci_is_vga(struct pci_dev *pdev)
return (pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA;
}

-static inline bool vfio_vga_disabled(void)
+static inline bool vfio_vga_disabled(struct vfio_pci_device *vdev)
{
#ifdef CONFIG_VFIO_PCI_VGA
- return disable_vga;
+ return vdev->disable_vga;
#else
return true;
#endif
}

+extern void vfio_pci_refresh_config(struct vfio_pci_device *vdev,
+ bool nointxmask, bool disable_idle_d3);
+
extern void vfio_pci_intx_mask(struct vfio_pci_device *vdev);
extern void vfio_pci_intx_unmask(struct vfio_pci_device *vdev);

--
2.7.4
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