#define VFIO_PCI_INDEX_TO_OFFSET(index) ((u64)(index) << VFIO_PCI_OFFSET_SHIFT)
#define VFIO_PCI_OFFSET_MASK (((u64)(1) << VFIO_PCI_OFFSET_SHIFT) - 1)
+#define EDID_BLOB_OFFSET (PAGE_SIZE/2)
+
#define OPREGION_SIGNATURE "IntelGraphicsMem"
struct vfio_region;
void *data;
};
+struct vfio_edid_region {
+ struct vfio_region_gfx_edid vfio_edid_regs;
+ void *edid_blob;
+};
+
struct kvmgt_pgfn {
gfn_t gfn;
struct hlist_node hnode;
.release = intel_vgpu_reg_release_opregion,
};
+static int handle_edid_regs(struct intel_vgpu *vgpu,
+ struct vfio_edid_region *region, char *buf,
+ size_t count, u16 offset, bool is_write)
+{
+ struct vfio_region_gfx_edid *regs = ®ion->vfio_edid_regs;
+ unsigned int data;
+
+ if (offset + count > sizeof(*regs))
+ return -EINVAL;
+
+ if (count != 4)
+ return -EINVAL;
+
+ if (is_write) {
+ data = *((unsigned int *)buf);
+ switch (offset) {
+ case offsetof(struct vfio_region_gfx_edid, link_state):
+ if (data == VFIO_DEVICE_GFX_LINK_STATE_UP) {
+ if (!drm_edid_block_valid(
+ (u8 *)region->edid_blob,
+ 0,
+ true,
+ NULL)) {
+ gvt_vgpu_err("invalid EDID blob\n");
+ return -EINVAL;
+ }
+ intel_gvt_ops->emulate_hotplug(vgpu, true);
+ } else if (data == VFIO_DEVICE_GFX_LINK_STATE_DOWN)
+ intel_gvt_ops->emulate_hotplug(vgpu, false);
+ else {
+ gvt_vgpu_err("invalid EDID link state %d\n",
+ regs->link_state);
+ return -EINVAL;
+ }
+ regs->link_state = data;
+ break;
+ case offsetof(struct vfio_region_gfx_edid, edid_size):
+ if (data > regs->edid_max_size) {
+ gvt_vgpu_err("EDID size is bigger than %d!\n",
+ regs->edid_max_size);
+ return -EINVAL;
+ }
+ regs->edid_size = data;
+ break;
+ default:
+ /* read-only regs */
+ gvt_vgpu_err("write read-only EDID region at offset %d\n",
+ offset);
+ return -EPERM;
+ }
+ } else {
+ memcpy(buf, (char *)regs + offset, count);
+ }
+
+ return count;
+}
+
+static int handle_edid_blob(struct vfio_edid_region *region, char *buf,
+ size_t count, u16 offset, bool is_write)
+{
+ if (offset + count > region->vfio_edid_regs.edid_size)
+ return -EINVAL;
+
+ if (is_write)
+ memcpy(region->edid_blob + offset, buf, count);
+ else
+ memcpy(buf, region->edid_blob + offset, count);
+
+ return count;
+}
+
+static size_t intel_vgpu_reg_rw_edid(struct intel_vgpu *vgpu, char *buf,
+ size_t count, loff_t *ppos, bool iswrite)
+{
+ int ret;
+ unsigned int i = VFIO_PCI_OFFSET_TO_INDEX(*ppos) -
+ VFIO_PCI_NUM_REGIONS;
+ struct vfio_edid_region *region =
+ (struct vfio_edid_region *)vgpu->vdev.region[i].data;
+ loff_t pos = *ppos & VFIO_PCI_OFFSET_MASK;
+
+ if (pos < region->vfio_edid_regs.edid_offset) {
+ ret = handle_edid_regs(vgpu, region, buf, count, pos, iswrite);
+ } else {
+ pos -= EDID_BLOB_OFFSET;
+ ret = handle_edid_blob(region, buf, count, pos, iswrite);
+ }
+
+ if (ret < 0)
+ gvt_vgpu_err("failed to access EDID region\n");
+
+ return ret;
+}
+
+static void intel_vgpu_reg_release_edid(struct intel_vgpu *vgpu,
+ struct vfio_region *region)
+{
+ kfree(region->data);
+}
+
+static const struct intel_vgpu_regops intel_vgpu_regops_edid = {
+ .rw = intel_vgpu_reg_rw_edid,
+ .release = intel_vgpu_reg_release_edid,
+};
+
static int intel_vgpu_register_reg(struct intel_vgpu *vgpu,
unsigned int type, unsigned int subtype,
const struct intel_vgpu_regops *ops,
return ret;
}
+static int kvmgt_set_edid(void *p_vgpu, int port_num)
+{
+ struct intel_vgpu *vgpu = (struct intel_vgpu *)p_vgpu;
+ struct intel_vgpu_port *port = intel_vgpu_port(vgpu, port_num);
+ struct vfio_edid_region *base;
+ int ret;
+
+ base = kzalloc(sizeof(*base), GFP_KERNEL);
+ if (!base)
+ return -ENOMEM;
+
+ /* TODO: Add multi-port and EDID extension block support */
+ base->vfio_edid_regs.edid_offset = EDID_BLOB_OFFSET;
+ base->vfio_edid_regs.edid_max_size = EDID_SIZE;
+ base->vfio_edid_regs.edid_size = EDID_SIZE;
+ base->vfio_edid_regs.max_xres = vgpu_edid_xres(port->id);
+ base->vfio_edid_regs.max_yres = vgpu_edid_yres(port->id);
+ base->edid_blob = port->edid->edid_block;
+
+ ret = intel_vgpu_register_reg(vgpu,
+ VFIO_REGION_TYPE_GFX,
+ VFIO_REGION_SUBTYPE_GFX_EDID,
+ &intel_vgpu_regops_edid, EDID_SIZE,
+ VFIO_REGION_INFO_FLAG_READ |
+ VFIO_REGION_INFO_FLAG_WRITE |
+ VFIO_REGION_INFO_FLAG_CAPS, base);
+
+ return ret;
+}
+
static void kvmgt_put_vfio_device(void *vgpu)
{
if (WARN_ON(!((struct intel_vgpu *)vgpu)->vdev.vfio_device))
goto undo_iommu;
}
+ /* Take a module reference as mdev core doesn't take
+ * a reference for vendor driver.
+ */
+ if (!try_module_get(THIS_MODULE))
+ goto undo_group;
+
ret = kvmgt_guest_init(mdev);
if (ret)
goto undo_group;
&vgpu->vdev.group_notifier);
WARN(ret, "vfio_unregister_notifier for group failed: %d\n", ret);
+ /* dereference module reference taken at open */
+ module_put(THIS_MODULE);
+
info = (struct kvmgt_guest_info *)vgpu->handle;
kvmgt_guest_exit(info);
__intel_vgpu_release(vgpu);
}
-static uint64_t intel_vgpu_get_bar_addr(struct intel_vgpu *vgpu, int bar)
+static u64 intel_vgpu_get_bar_addr(struct intel_vgpu *vgpu, int bar)
{
u32 start_lo, start_hi;
u32 mem_type;
return ((u64)start_hi << 32) | start_lo;
}
-static int intel_vgpu_bar_rw(struct intel_vgpu *vgpu, int bar, uint64_t off,
+static int intel_vgpu_bar_rw(struct intel_vgpu *vgpu, int bar, u64 off,
void *buf, unsigned int count, bool is_write)
{
- uint64_t bar_start = intel_vgpu_get_bar_addr(vgpu, bar);
+ u64 bar_start = intel_vgpu_get_bar_addr(vgpu, bar);
int ret;
if (is_write)
return ret;
}
-static inline bool intel_vgpu_in_aperture(struct intel_vgpu *vgpu, uint64_t off)
+static inline bool intel_vgpu_in_aperture(struct intel_vgpu *vgpu, u64 off)
{
return off >= vgpu_aperture_offset(vgpu) &&
off < vgpu_aperture_offset(vgpu) + vgpu_aperture_sz(vgpu);
}
-static int intel_vgpu_aperture_rw(struct intel_vgpu *vgpu, uint64_t off,
+static int intel_vgpu_aperture_rw(struct intel_vgpu *vgpu, u64 off,
void *buf, unsigned long count, bool is_write)
{
void *aperture_va;
{
struct intel_vgpu *vgpu = mdev_get_drvdata(mdev);
unsigned int index = VFIO_PCI_OFFSET_TO_INDEX(*ppos);
- uint64_t pos = *ppos & VFIO_PCI_OFFSET_MASK;
+ u64 pos = *ppos & VFIO_PCI_OFFSET_MASK;
int ret = -EINVAL;
static int intel_vgpu_set_intx_mask(struct intel_vgpu *vgpu,
unsigned int index, unsigned int start,
- unsigned int count, uint32_t flags,
+ unsigned int count, u32 flags,
void *data)
{
return 0;
static int intel_vgpu_set_intx_unmask(struct intel_vgpu *vgpu,
unsigned int index, unsigned int start,
- unsigned int count, uint32_t flags, void *data)
+ unsigned int count, u32 flags, void *data)
{
return 0;
}
static int intel_vgpu_set_intx_trigger(struct intel_vgpu *vgpu,
unsigned int index, unsigned int start, unsigned int count,
- uint32_t flags, void *data)
+ u32 flags, void *data)
{
return 0;
}
static int intel_vgpu_set_msi_trigger(struct intel_vgpu *vgpu,
unsigned int index, unsigned int start, unsigned int count,
- uint32_t flags, void *data)
+ u32 flags, void *data)
{
struct eventfd_ctx *trigger;
return 0;
}
-static int intel_vgpu_set_irqs(struct intel_vgpu *vgpu, uint32_t flags,
+static int intel_vgpu_set_irqs(struct intel_vgpu *vgpu, u32 flags,
unsigned int index, unsigned int start, unsigned int count,
void *data)
{
int (*func)(struct intel_vgpu *vgpu, unsigned int index,
- unsigned int start, unsigned int count, uint32_t flags,
+ unsigned int start, unsigned int count, u32 flags,
void *data) = NULL;
switch (index) {
return mdev_register_device(dev, &intel_vgpu_ops);
}
-static void kvmgt_host_exit(struct device *dev, void *gvt)
+static void kvmgt_host_exit(struct device *dev)
{
mdev_unregister_device(dev);
}
return ret;
}
-struct intel_gvt_mpt kvmgt_mpt = {
+static struct intel_gvt_mpt kvmgt_mpt = {
+ .type = INTEL_GVT_HYPERVISOR_KVM,
.host_init = kvmgt_host_init,
.host_exit = kvmgt_host_exit,
.attach_vgpu = kvmgt_attach_vgpu,
.dma_map_guest_page = kvmgt_dma_map_guest_page,
.dma_unmap_guest_page = kvmgt_dma_unmap_guest_page,
.set_opregion = kvmgt_set_opregion,
+ .set_edid = kvmgt_set_edid,
.get_vfio_device = kvmgt_get_vfio_device,
.put_vfio_device = kvmgt_put_vfio_device,
.is_valid_gfn = kvmgt_is_valid_gfn,
};
-EXPORT_SYMBOL_GPL(kvmgt_mpt);
static int __init kvmgt_init(void)
{
+ if (intel_gvt_register_hypervisor(&kvmgt_mpt) < 0)
+ return -ENODEV;
return 0;
}
static void __exit kvmgt_exit(void)
{
+ intel_gvt_unregister_hypervisor();
}
module_init(kvmgt_init);
git.samba.org / sfrench / cifs-2.6.git / blobdiff