Merge tag 'vfio-v4.20-rc1.v2' of git://github.com/awilliam/linux-vfio

[sfrench/cifs-2.6.git] / include / uapi / linux / vfio.h

diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index 1aa7b82e81697579b148ff9be4ff775ab0f15c03..813102810f53eaf37552d13f512b5d54ccff7aad 100644 (file)
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -200,6 +200,7 @@ struct vfio_device_info {
 #define VFIO_DEVICE_FLAGS_PLATFORM (1 << 2)    /* vfio-platform device */
 #define VFIO_DEVICE_FLAGS_AMBA  (1 << 3)       /* vfio-amba device */
 #define VFIO_DEVICE_FLAGS_CCW  (1 << 4)        /* vfio-ccw device */
+#define VFIO_DEVICE_FLAGS_AP   (1 << 5)        /* vfio-ap device */
        __u32   num_regions;    /* Max region index + 1 */
        __u32   num_irqs;       /* Max IRQ index + 1 */
 };
@@ -215,6 +216,7 @@ struct vfio_device_info {
 #define VFIO_DEVICE_API_PLATFORM_STRING                "vfio-platform"
 #define VFIO_DEVICE_API_AMBA_STRING            "vfio-amba"
 #define VFIO_DEVICE_API_CCW_STRING             "vfio-ccw"
+#define VFIO_DEVICE_API_AP_STRING              "vfio-ap"
 
 /**
  * VFIO_DEVICE_GET_REGION_INFO - _IOWR(VFIO_TYPE, VFIO_BASE + 8,
@@ -301,6 +303,56 @@ struct vfio_region_info_cap_type {
 #define VFIO_REGION_SUBTYPE_INTEL_IGD_HOST_CFG (2)
 #define VFIO_REGION_SUBTYPE_INTEL_IGD_LPC_CFG  (3)
 
+#define VFIO_REGION_TYPE_GFX                    (1)
+#define VFIO_REGION_SUBTYPE_GFX_EDID            (1)
+
+/**
+ * struct vfio_region_gfx_edid - EDID region layout.
+ *
+ * Set display link state and EDID blob.
+ *
+ * The EDID blob has monitor information such as brand, name, serial
+ * number, physical size, supported video modes and more.
+ *
+ * This special region allows userspace (typically qemu) set a virtual
+ * EDID for the virtual monitor, which allows a flexible display
+ * configuration.
+ *
+ * For the edid blob spec look here:
+ *    https://en.wikipedia.org/wiki/Extended_Display_Identification_Data
+ *
+ * On linux systems you can find the EDID blob in sysfs:
+ *    /sys/class/drm/${card}/${connector}/edid
+ *
+ * You can use the edid-decode ulility (comes with xorg-x11-utils) to
+ * decode the EDID blob.
+ *
+ * @edid_offset: location of the edid blob, relative to the
+ *               start of the region (readonly).
+ * @edid_max_size: max size of the edid blob (readonly).
+ * @edid_size: actual edid size (read/write).
+ * @link_state: display link state (read/write).
+ * VFIO_DEVICE_GFX_LINK_STATE_UP: Monitor is turned on.
+ * VFIO_DEVICE_GFX_LINK_STATE_DOWN: Monitor is turned off.
+ * @max_xres: max display width (0 == no limitation, readonly).
+ * @max_yres: max display height (0 == no limitation, readonly).
+ *
+ * EDID update protocol:
+ *   (1) set link-state to down.
+ *   (2) update edid blob and size.
+ *   (3) set link-state to up.
+ */
+struct vfio_region_gfx_edid {
+       __u32 edid_offset;
+       __u32 edid_max_size;
+       __u32 edid_size;
+       __u32 max_xres;
+       __u32 max_yres;
+       __u32 link_state;
+#define VFIO_DEVICE_GFX_LINK_STATE_UP    1
+#define VFIO_DEVICE_GFX_LINK_STATE_DOWN  2
+};
+
 /*
  * The MSIX mappable capability informs that MSIX data of a BAR can be mmapped
  * which allows direct access to non-MSIX registers which happened to be within