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path: root/drivers/gpu/drm/vboxvideo/vboxvideo.h
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Diffstat (limited to 'drivers/gpu/drm/vboxvideo/vboxvideo.h')
-rw-r--r--drivers/gpu/drm/vboxvideo/vboxvideo.h442
1 files changed, 442 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vboxvideo/vboxvideo.h b/drivers/gpu/drm/vboxvideo/vboxvideo.h
new file mode 100644
index 000000000000..0592004f71aa
--- /dev/null
+++ b/drivers/gpu/drm/vboxvideo/vboxvideo.h
@@ -0,0 +1,442 @@
+/* SPDX-License-Identifier: MIT */
+/* Copyright (C) 2006-2016 Oracle Corporation */
+
+#ifndef __VBOXVIDEO_H__
+#define __VBOXVIDEO_H__
+
+#define VBOX_VIDEO_MAX_SCREENS 64
+
+/*
+ * The last 4096 bytes of the guest VRAM contains the generic info for all
+ * DualView chunks: sizes and offsets of chunks. This is filled by miniport.
+ *
+ * Last 4096 bytes of each chunk contain chunk specific data: framebuffer info,
+ * etc. This is used exclusively by the corresponding instance of a display
+ * driver.
+ *
+ * The VRAM layout:
+ * Last 4096 bytes - Adapter information area.
+ * 4096 bytes aligned miniport heap (value specified in the config rouded up).
+ * Slack - what left after dividing the VRAM.
+ * 4096 bytes aligned framebuffers:
+ * last 4096 bytes of each framebuffer is the display information area.
+ *
+ * The Virtual Graphics Adapter information in the guest VRAM is stored by the
+ * guest video driver using structures prepended by VBOXVIDEOINFOHDR.
+ *
+ * When the guest driver writes dword 0 to the VBE_DISPI_INDEX_VBOX_VIDEO
+ * the host starts to process the info. The first element at the start of
+ * the 4096 bytes region should be normally be a LINK that points to
+ * actual information chain. That way the guest driver can have some
+ * fixed layout of the information memory block and just rewrite
+ * the link to point to relevant memory chain.
+ *
+ * The processing stops at the END element.
+ *
+ * The host can access the memory only when the port IO is processed.
+ * All data that will be needed later must be copied from these 4096 bytes.
+ * But other VRAM can be used by host until the mode is disabled.
+ *
+ * The guest driver writes dword 0xffffffff to the VBE_DISPI_INDEX_VBOX_VIDEO
+ * to disable the mode.
+ *
+ * VBE_DISPI_INDEX_VBOX_VIDEO is used to read the configuration information
+ * from the host and issue commands to the host.
+ *
+ * The guest writes the VBE_DISPI_INDEX_VBOX_VIDEO index register, the the
+ * following operations with the VBE data register can be performed:
+ *
+ * Operation Result
+ * write 16 bit value NOP
+ * read 16 bit value count of monitors
+ * write 32 bit value set the vbox cmd value and the cmd processed by the host
+ * read 32 bit value result of the last vbox command is returned
+ */
+
+struct vbva_cmd_hdr {
+ s16 x;
+ s16 y;
+ u16 w;
+ u16 h;
+} __packed;
+
+/*
+ * The VBVA ring buffer is suitable for transferring large (< 2GB) amount of
+ * data. For example big bitmaps which do not fit to the buffer.
+ *
+ * Guest starts writing to the buffer by initializing a record entry in the
+ * records queue. VBVA_F_RECORD_PARTIAL indicates that the record is being
+ * written. As data is written to the ring buffer, the guest increases
+ * free_offset.
+ *
+ * The host reads the records on flushes and processes all completed records.
+ * When host encounters situation when only a partial record presents and
+ * len_and_flags & ~VBVA_F_RECORD_PARTIAL >= VBVA_RING_BUFFER_SIZE -
+ * VBVA_RING_BUFFER_THRESHOLD, the host fetched all record data and updates
+ * data_offset. After that on each flush the host continues fetching the data
+ * until the record is completed.
+ */
+
+#define VBVA_RING_BUFFER_SIZE (4194304 - 1024)
+#define VBVA_RING_BUFFER_THRESHOLD (4096)
+
+#define VBVA_MAX_RECORDS (64)
+
+#define VBVA_F_MODE_ENABLED 0x00000001u
+#define VBVA_F_MODE_VRDP 0x00000002u
+#define VBVA_F_MODE_VRDP_RESET 0x00000004u
+#define VBVA_F_MODE_VRDP_ORDER_MASK 0x00000008u
+
+#define VBVA_F_STATE_PROCESSING 0x00010000u
+
+#define VBVA_F_RECORD_PARTIAL 0x80000000u
+
+struct vbva_record {
+ u32 len_and_flags;
+} __packed;
+
+/*
+ * The minimum HGSMI heap size is PAGE_SIZE (4096 bytes) and is a restriction of
+ * the runtime heapsimple API. Use minimum 2 pages here, because the info area
+ * also may contain other data (for example hgsmi_host_flags structure).
+ */
+#define VBVA_ADAPTER_INFORMATION_SIZE 65536
+#define VBVA_MIN_BUFFER_SIZE 65536
+
+/* The value for port IO to let the adapter to interpret the adapter memory. */
+#define VBOX_VIDEO_DISABLE_ADAPTER_MEMORY 0xFFFFFFFF
+
+/* The value for port IO to let the adapter to interpret the adapter memory. */
+#define VBOX_VIDEO_INTERPRET_ADAPTER_MEMORY 0x00000000
+
+/*
+ * The value for port IO to let the adapter to interpret the display memory.
+ * The display number is encoded in low 16 bits.
+ */
+#define VBOX_VIDEO_INTERPRET_DISPLAY_MEMORY_BASE 0x00010000
+
+struct vbva_host_flags {
+ u32 host_events;
+ u32 supported_orders;
+} __packed;
+
+struct vbva_buffer {
+ struct vbva_host_flags host_flags;
+
+ /* The offset where the data start in the buffer. */
+ u32 data_offset;
+ /* The offset where next data must be placed in the buffer. */
+ u32 free_offset;
+
+ /* The queue of record descriptions. */
+ struct vbva_record records[VBVA_MAX_RECORDS];
+ u32 record_first_index;
+ u32 record_free_index;
+
+ /* Space to leave free when large partial records are transferred. */
+ u32 partial_write_tresh;
+
+ u32 data_len;
+ /* variable size for the rest of the vbva_buffer area in VRAM. */
+ u8 data[0];
+} __packed;
+
+#define VBVA_MAX_RECORD_SIZE (128 * 1024 * 1024)
+
+/* guest->host commands */
+#define VBVA_QUERY_CONF32 1
+#define VBVA_SET_CONF32 2
+#define VBVA_INFO_VIEW 3
+#define VBVA_INFO_HEAP 4
+#define VBVA_FLUSH 5
+#define VBVA_INFO_SCREEN 6
+#define VBVA_ENABLE 7
+#define VBVA_MOUSE_POINTER_SHAPE 8
+/* informs host about HGSMI caps. see vbva_caps below */
+#define VBVA_INFO_CAPS 12
+/* configures scanline, see VBVASCANLINECFG below */
+#define VBVA_SCANLINE_CFG 13
+/* requests scanline info, see VBVASCANLINEINFO below */
+#define VBVA_SCANLINE_INFO 14
+/* inform host about VBVA Command submission */
+#define VBVA_CMDVBVA_SUBMIT 16
+/* inform host about VBVA Command submission */
+#define VBVA_CMDVBVA_FLUSH 17
+/* G->H DMA command */
+#define VBVA_CMDVBVA_CTL 18
+/* Query most recent mode hints sent */
+#define VBVA_QUERY_MODE_HINTS 19
+/*
+ * Report the guest virtual desktop position and size for mapping host and
+ * guest pointer positions.
+ */
+#define VBVA_REPORT_INPUT_MAPPING 20
+/* Report the guest cursor position and query the host position. */
+#define VBVA_CURSOR_POSITION 21
+
+/* host->guest commands */
+#define VBVAHG_EVENT 1
+#define VBVAHG_DISPLAY_CUSTOM 2
+
+/* vbva_conf32::index */
+#define VBOX_VBVA_CONF32_MONITOR_COUNT 0
+#define VBOX_VBVA_CONF32_HOST_HEAP_SIZE 1
+/*
+ * Returns VINF_SUCCESS if the host can report mode hints via VBVA.
+ * Set value to VERR_NOT_SUPPORTED before calling.
+ */
+#define VBOX_VBVA_CONF32_MODE_HINT_REPORTING 2
+/*
+ * Returns VINF_SUCCESS if the host can report guest cursor enabled status via
+ * VBVA. Set value to VERR_NOT_SUPPORTED before calling.
+ */
+#define VBOX_VBVA_CONF32_GUEST_CURSOR_REPORTING 3
+/*
+ * Returns the currently available host cursor capabilities. Available if
+ * VBOX_VBVA_CONF32_GUEST_CURSOR_REPORTING returns success.
+ */
+#define VBOX_VBVA_CONF32_CURSOR_CAPABILITIES 4
+/* Returns the supported flags in vbva_infoscreen.flags. */
+#define VBOX_VBVA_CONF32_SCREEN_FLAGS 5
+/* Returns the max size of VBVA record. */
+#define VBOX_VBVA_CONF32_MAX_RECORD_SIZE 6
+
+struct vbva_conf32 {
+ u32 index;
+ u32 value;
+} __packed;
+
+/* Reserved for historical reasons. */
+#define VBOX_VBVA_CURSOR_CAPABILITY_RESERVED0 BIT(0)
+/*
+ * Guest cursor capability: can the host show a hardware cursor at the host
+ * pointer location?
+ */
+#define VBOX_VBVA_CURSOR_CAPABILITY_HARDWARE BIT(1)
+/* Reserved for historical reasons. */
+#define VBOX_VBVA_CURSOR_CAPABILITY_RESERVED2 BIT(2)
+/* Reserved for historical reasons. Must always be unset. */
+#define VBOX_VBVA_CURSOR_CAPABILITY_RESERVED3 BIT(3)
+/* Reserved for historical reasons. */
+#define VBOX_VBVA_CURSOR_CAPABILITY_RESERVED4 BIT(4)
+/* Reserved for historical reasons. */
+#define VBOX_VBVA_CURSOR_CAPABILITY_RESERVED5 BIT(5)
+
+struct vbva_infoview {
+ /* Index of the screen, assigned by the guest. */
+ u32 view_index;
+
+ /* The screen offset in VRAM, the framebuffer starts here. */
+ u32 view_offset;
+
+ /* The size of the VRAM memory that can be used for the view. */
+ u32 view_size;
+
+ /* The recommended maximum size of the VRAM memory for the screen. */
+ u32 max_screen_size;
+} __packed;
+
+struct vbva_flush {
+ u32 reserved;
+} __packed;
+
+/* vbva_infoscreen.flags */
+#define VBVA_SCREEN_F_NONE 0x0000
+#define VBVA_SCREEN_F_ACTIVE 0x0001
+/*
+ * The virtual monitor has been disabled by the guest and should be removed
+ * by the host and ignored for purposes of pointer position calculation.
+ */
+#define VBVA_SCREEN_F_DISABLED 0x0002
+/*
+ * The virtual monitor has been blanked by the guest and should be blacked
+ * out by the host using width, height, etc values from the vbva_infoscreen
+ * request.
+ */
+#define VBVA_SCREEN_F_BLANK 0x0004
+/*
+ * The virtual monitor has been blanked by the guest and should be blacked
+ * out by the host using the previous mode values for width. height, etc.
+ */
+#define VBVA_SCREEN_F_BLANK2 0x0008
+
+struct vbva_infoscreen {
+ /* Which view contains the screen. */
+ u32 view_index;
+
+ /* Physical X origin relative to the primary screen. */
+ s32 origin_x;
+
+ /* Physical Y origin relative to the primary screen. */
+ s32 origin_y;
+
+ /* Offset of visible framebuffer relative to the framebuffer start. */
+ u32 start_offset;
+
+ /* The scan line size in bytes. */
+ u32 line_size;
+
+ /* Width of the screen. */
+ u32 width;
+
+ /* Height of the screen. */
+ u32 height;
+
+ /* Color depth. */
+ u16 bits_per_pixel;
+
+ /* VBVA_SCREEN_F_* */
+ u16 flags;
+} __packed;
+
+/* vbva_enable.flags */
+#define VBVA_F_NONE 0x00000000
+#define VBVA_F_ENABLE 0x00000001
+#define VBVA_F_DISABLE 0x00000002
+/* extended VBVA to be used with WDDM */
+#define VBVA_F_EXTENDED 0x00000004
+/* vbva offset is absolute VRAM offset */
+#define VBVA_F_ABSOFFSET 0x00000008
+
+struct vbva_enable {
+ u32 flags;
+ u32 offset;
+ s32 result;
+} __packed;
+
+struct vbva_enable_ex {
+ struct vbva_enable base;
+ u32 screen_id;
+} __packed;
+
+struct vbva_mouse_pointer_shape {
+ /* The host result. */
+ s32 result;
+
+ /* VBOX_MOUSE_POINTER_* bit flags. */
+ u32 flags;
+
+ /* X coordinate of the hot spot. */
+ u32 hot_X;
+
+ /* Y coordinate of the hot spot. */
+ u32 hot_y;
+
+ /* Width of the pointer in pixels. */
+ u32 width;
+
+ /* Height of the pointer in scanlines. */
+ u32 height;
+
+ /* Pointer data.
+ *
+ * The data consists of 1 bpp AND mask followed by 32 bpp XOR (color)
+ * mask.
+ *
+ * For pointers without alpha channel the XOR mask pixels are 32 bit
+ * values: (lsb)BGR0(msb). For pointers with alpha channel the XOR mask
+ * consists of (lsb)BGRA(msb) 32 bit values.
+ *
+ * Guest driver must create the AND mask for pointers with alpha chan.,
+ * so if host does not support alpha, the pointer could be displayed as
+ * a normal color pointer. The AND mask can be constructed from alpha
+ * values. For example alpha value >= 0xf0 means bit 0 in the AND mask.
+ *
+ * The AND mask is 1 bpp bitmap with byte aligned scanlines. Size of AND
+ * mask, therefore, is and_len = (width + 7) / 8 * height. The padding
+ * bits at the end of any scanline are undefined.
+ *
+ * The XOR mask follows the AND mask on the next 4 bytes aligned offset:
+ * u8 *xor = and + (and_len + 3) & ~3
+ * Bytes in the gap between the AND and the XOR mask are undefined.
+ * XOR mask scanlines have no gap between them and size of XOR mask is:
+ * xor_len = width * 4 * height.
+ *
+ * Preallocate 4 bytes for accessing actual data as p->data.
+ */
+ u8 data[4];
+} __packed;
+
+/* pointer is visible */
+#define VBOX_MOUSE_POINTER_VISIBLE 0x0001
+/* pointer has alpha channel */
+#define VBOX_MOUSE_POINTER_ALPHA 0x0002
+/* pointerData contains new pointer shape */
+#define VBOX_MOUSE_POINTER_SHAPE 0x0004
+
+/*
+ * The guest driver can handle asynch guest cmd completion by reading the
+ * command offset from io port.
+ */
+#define VBVACAPS_COMPLETEGCMD_BY_IOREAD 0x00000001
+/* the guest driver can handle video adapter IRQs */
+#define VBVACAPS_IRQ 0x00000002
+/* The guest can read video mode hints sent via VBVA. */
+#define VBVACAPS_VIDEO_MODE_HINTS 0x00000004
+/* The guest can switch to a software cursor on demand. */
+#define VBVACAPS_DISABLE_CURSOR_INTEGRATION 0x00000008
+/* The guest does not depend on host handling the VBE registers. */
+#define VBVACAPS_USE_VBVA_ONLY 0x00000010
+
+struct vbva_caps {
+ s32 rc;
+ u32 caps;
+} __packed;
+
+/* Query the most recent mode hints received from the host. */
+struct vbva_query_mode_hints {
+ /* The maximum number of screens to return hints for. */
+ u16 hints_queried_count;
+ /* The size of the mode hint structures directly following this one. */
+ u16 hint_structure_guest_size;
+ /* Return code for the operation. Initialise to VERR_NOT_SUPPORTED. */
+ s32 rc;
+} __packed;
+
+/*
+ * Structure in which a mode hint is returned. The guest allocates an array
+ * of these immediately after the vbva_query_mode_hints structure.
+ * To accommodate future extensions, the vbva_query_mode_hints structure
+ * specifies the size of the vbva_modehint structures allocated by the guest,
+ * and the host only fills out structure elements which fit into that size. The
+ * host should fill any unused members (e.g. dx, dy) or structure space on the
+ * end with ~0. The whole structure can legally be set to ~0 to skip a screen.
+ */
+struct vbva_modehint {
+ u32 magic;
+ u32 cx;
+ u32 cy;
+ u32 bpp; /* Which has never been used... */
+ u32 display;
+ u32 dx; /* X offset into the virtual frame-buffer. */
+ u32 dy; /* Y offset into the virtual frame-buffer. */
+ u32 enabled; /* Not flags. Add new members for new flags. */
+} __packed;
+
+#define VBVAMODEHINT_MAGIC 0x0801add9u
+
+/*
+ * Report the rectangle relative to which absolute pointer events should be
+ * expressed. This information remains valid until the next VBVA resize event
+ * for any screen, at which time it is reset to the bounding rectangle of all
+ * virtual screens and must be re-set.
+ */
+struct vbva_report_input_mapping {
+ s32 x; /* Upper left X co-ordinate relative to the first screen. */
+ s32 y; /* Upper left Y co-ordinate relative to the first screen. */
+ u32 cx; /* Rectangle width. */
+ u32 cy; /* Rectangle height. */
+} __packed;
+
+/*
+ * Report the guest cursor position and query the host one. The host may wish
+ * to use the guest information to re-position its own cursor (though this is
+ * currently unlikely).
+ */
+struct vbva_cursor_position {
+ u32 report_position; /* Are we reporting a position? */
+ u32 x; /* Guest cursor X position */
+ u32 y; /* Guest cursor Y position */
+} __packed;
+
+#endif