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vmware-svga/lib/vmware/svga_reg.h
José Fonseca 329dd53745 Update headers & examples.
2011-09-19 13:21:29 +00:00

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/**********************************************************
* Copyright 1998-2009 VMware, Inc. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
**********************************************************/
/*
* svga_reg.h --
*
* Virtual hardware definitions for the VMware SVGA II device.
*/
#ifndef _SVGA_REG_H_
#define _SVGA_REG_H_
/*
* PCI device IDs.
*/
#define PCI_VENDOR_ID_VMWARE 0x15AD
#define PCI_DEVICE_ID_VMWARE_SVGA2 0x0405
/*
* SVGA_REG_ENABLE bit definitions.
*/
#define SVGA_REG_ENABLE_DISABLE 0
#define SVGA_REG_ENABLE_ENABLE 1
#define SVGA_REG_ENABLE_HIDE 2
#define SVGA_REG_ENABLE_ENABLE_HIDE (SVGA_REG_ENABLE_ENABLE |\
SVGA_REG_ENABLE_HIDE)
/*
* Legal values for the SVGA_REG_CURSOR_ON register in old-fashioned
* cursor bypass mode. This is still supported, but no new guest
* drivers should use it.
*/
#define SVGA_CURSOR_ON_HIDE 0x0 /* Must be 0 to maintain backward compatibility */
#define SVGA_CURSOR_ON_SHOW 0x1 /* Must be 1 to maintain backward compatibility */
#define SVGA_CURSOR_ON_REMOVE_FROM_FB 0x2 /* Remove the cursor from the framebuffer because we need to see what's under it */
#define SVGA_CURSOR_ON_RESTORE_TO_FB 0x3 /* Put the cursor back in the framebuffer so the user can see it */
/*
* The maximum framebuffer size that can traced for e.g. guests in VESA mode.
* The changeMap in the monitor is proportional to this number. Therefore, we'd
* like to keep it as small as possible to reduce monitor overhead (using
* SVGA_VRAM_MAX_SIZE for this increases the size of the shared area by over
* 4k!).
*
* NB: For compatibility reasons, this value must be greater than 0xff0000.
* See bug 335072.
*/
#define SVGA_FB_MAX_TRACEABLE_SIZE 0x1000000
#define SVGA_MAX_PSEUDOCOLOR_DEPTH 8
#define SVGA_MAX_PSEUDOCOLORS (1 << SVGA_MAX_PSEUDOCOLOR_DEPTH)
#define SVGA_NUM_PALETTE_REGS (3 * SVGA_MAX_PSEUDOCOLORS)
#define SVGA_MAGIC 0x900000UL
#define SVGA_MAKE_ID(ver) (SVGA_MAGIC << 8 | (ver))
/* Version 2 let the address of the frame buffer be unsigned on Win32 */
#define SVGA_VERSION_2 2
#define SVGA_ID_2 SVGA_MAKE_ID(SVGA_VERSION_2)
/* Version 1 has new registers starting with SVGA_REG_CAPABILITIES so
PALETTE_BASE has moved */
#define SVGA_VERSION_1 1
#define SVGA_ID_1 SVGA_MAKE_ID(SVGA_VERSION_1)
/* Version 0 is the initial version */
#define SVGA_VERSION_0 0
#define SVGA_ID_0 SVGA_MAKE_ID(SVGA_VERSION_0)
/* "Invalid" value for all SVGA IDs. (Version ID, screen object ID, surface ID...) */
#define SVGA_ID_INVALID 0xFFFFFFFF
/* Port offsets, relative to BAR0 */
#define SVGA_INDEX_PORT 0x0
#define SVGA_VALUE_PORT 0x1
#define SVGA_BIOS_PORT 0x2
#define SVGA_IRQSTATUS_PORT 0x8
/*
* Interrupt source flags for IRQSTATUS_PORT and IRQMASK.
*
* Interrupts are only supported when the
* SVGA_CAP_IRQMASK capability is present.
*/
#define SVGA_IRQFLAG_ANY_FENCE 0x1 /* Any fence was passed */
#define SVGA_IRQFLAG_FIFO_PROGRESS 0x2 /* Made forward progress in the FIFO */
#define SVGA_IRQFLAG_FENCE_GOAL 0x4 /* SVGA_FIFO_FENCE_GOAL reached */
/*
* Registers
*/
enum {
SVGA_REG_ID = 0,
SVGA_REG_ENABLE = 1,
SVGA_REG_WIDTH = 2,
SVGA_REG_HEIGHT = 3,
SVGA_REG_MAX_WIDTH = 4,
SVGA_REG_MAX_HEIGHT = 5,
SVGA_REG_DEPTH = 6,
SVGA_REG_BITS_PER_PIXEL = 7, /* Current bpp in the guest */
SVGA_REG_PSEUDOCOLOR = 8,
SVGA_REG_RED_MASK = 9,
SVGA_REG_GREEN_MASK = 10,
SVGA_REG_BLUE_MASK = 11,
SVGA_REG_BYTES_PER_LINE = 12,
SVGA_REG_FB_START = 13, /* (Deprecated) */
SVGA_REG_FB_OFFSET = 14,
SVGA_REG_VRAM_SIZE = 15,
SVGA_REG_FB_SIZE = 16,
/* ID 0 implementation only had the above registers, then the palette */
SVGA_REG_CAPABILITIES = 17,
SVGA_REG_MEM_START = 18, /* (Deprecated) */
SVGA_REG_MEM_SIZE = 19,
SVGA_REG_CONFIG_DONE = 20, /* Set when memory area configured */
SVGA_REG_SYNC = 21, /* See "FIFO Synchronization Registers" */
SVGA_REG_BUSY = 22, /* See "FIFO Synchronization Registers" */
SVGA_REG_GUEST_ID = 23, /* Set guest OS identifier */
SVGA_REG_CURSOR_ID = 24, /* (Deprecated) */
SVGA_REG_CURSOR_X = 25, /* (Deprecated) */
SVGA_REG_CURSOR_Y = 26, /* (Deprecated) */
SVGA_REG_CURSOR_ON = 27, /* (Deprecated) */
SVGA_REG_HOST_BITS_PER_PIXEL = 28, /* (Deprecated) */
SVGA_REG_SCRATCH_SIZE = 29, /* Number of scratch registers */
SVGA_REG_MEM_REGS = 30, /* Number of FIFO registers */
SVGA_REG_NUM_DISPLAYS = 31, /* (Deprecated) */
SVGA_REG_PITCHLOCK = 32, /* Fixed pitch for all modes */
SVGA_REG_IRQMASK = 33, /* Interrupt mask */
/* Legacy multi-monitor support */
SVGA_REG_NUM_GUEST_DISPLAYS = 34,/* Number of guest displays in X/Y direction */
SVGA_REG_DISPLAY_ID = 35, /* Display ID for the following display attributes */
SVGA_REG_DISPLAY_IS_PRIMARY = 36,/* Whether this is a primary display */
SVGA_REG_DISPLAY_POSITION_X = 37,/* The display position x */
SVGA_REG_DISPLAY_POSITION_Y = 38,/* The display position y */
SVGA_REG_DISPLAY_WIDTH = 39, /* The display's width */
SVGA_REG_DISPLAY_HEIGHT = 40, /* The display's height */
/* See "Guest memory regions" below. */
SVGA_REG_GMR_ID = 41,
SVGA_REG_GMR_DESCRIPTOR = 42,
SVGA_REG_GMR_MAX_IDS = 43,
SVGA_REG_GMR_MAX_DESCRIPTOR_LENGTH = 44,
SVGA_REG_TRACES = 45, /* Enable trace-based updates even when FIFO is on */
SVGA_REG_GMRS_MAX_PAGES = 46, /* Maximum number of 4KB pages for all GMRs */
SVGA_REG_MEMORY_SIZE = 47, /* Total dedicated device memory excluding FIFO */
SVGA_REG_TOP = 48, /* Must be 1 more than the last register */
SVGA_PALETTE_BASE = 1024, /* Base of SVGA color map */
/* Next 768 (== 256*3) registers exist for colormap */
SVGA_SCRATCH_BASE = SVGA_PALETTE_BASE + SVGA_NUM_PALETTE_REGS
/* Base of scratch registers */
/* Next reg[SVGA_REG_SCRATCH_SIZE] registers exist for scratch usage:
First 4 are reserved for VESA BIOS Extension; any remaining are for
the use of the current SVGA driver. */
};
/*
* Guest memory regions (GMRs):
*
* This is a new memory mapping feature available in SVGA devices
* which have the SVGA_CAP_GMR bit set. Previously, there were two
* fixed memory regions available with which to share data between the
* device and the driver: the FIFO ('MEM') and the framebuffer. GMRs
* are our name for an extensible way of providing arbitrary DMA
* buffers for use between the driver and the SVGA device. They are a
* new alternative to framebuffer memory, usable for both 2D and 3D
* graphics operations.
*
* Since GMR mapping must be done synchronously with guest CPU
* execution, we use a new pair of SVGA registers:
*
* SVGA_REG_GMR_ID --
*
* Read/write.
* This register holds the 32-bit ID (a small positive integer)
* of a GMR to create, delete, or redefine. Writing this register
* has no side-effects.
*
* SVGA_REG_GMR_DESCRIPTOR --
*
* Write-only.
* Writing this register will create, delete, or redefine the GMR
* specified by the above ID register. If this register is zero,
* the GMR is deleted. Any pointers into this GMR (including those
* currently being processed by FIFO commands) will be
* synchronously invalidated.
*
* If this register is nonzero, it must be the physical page
* number (PPN) of a data structure which describes the physical
* layout of the memory region this GMR should describe. The
* descriptor structure will be read synchronously by the SVGA
* device when this register is written. The descriptor need not
* remain allocated for the lifetime of the GMR.
*
* The guest driver should write SVGA_REG_GMR_ID first, then
* SVGA_REG_GMR_DESCRIPTOR.
*
* SVGA_REG_GMR_MAX_IDS --
*
* Read-only.
* The SVGA device may choose to support a maximum number of
* user-defined GMR IDs. This register holds the number of supported
* IDs. (The maximum supported ID plus 1)
*
* SVGA_REG_GMR_MAX_DESCRIPTOR_LENGTH --
*
* Read-only.
* The SVGA device may choose to put a limit on the total number
* of SVGAGuestMemDescriptor structures it will read when defining
* a single GMR.
*
* The descriptor structure is an array of SVGAGuestMemDescriptor
* structures. Each structure may do one of three things:
*
* - Terminate the GMR descriptor list.
* (ppn==0, numPages==0)
*
* - Add a PPN or range of PPNs to the GMR's virtual address space.
* (ppn != 0, numPages != 0)
*
* - Provide the PPN of the next SVGAGuestMemDescriptor, in order to
* support multi-page GMR descriptor tables without forcing the
* driver to allocate physically contiguous memory.
* (ppn != 0, numPages == 0)
*
* Note that each physical page of SVGAGuestMemDescriptor structures
* can describe at least 2MB of guest memory. If the driver needs to
* use more than one page of descriptor structures, it must use one of
* its SVGAGuestMemDescriptors to point to an additional page. The
* device will never automatically cross a page boundary.
*
* Once the driver has described a GMR, it is immediately available
* for use via any FIFO command that uses an SVGAGuestPtr structure.
* These pointers include a GMR identifier plus an offset into that
* GMR.
*
* The driver must check the SVGA_CAP_GMR bit before using the GMR
* registers.
*/
/*
* Special GMR IDs, allowing SVGAGuestPtrs to point to framebuffer
* memory as well. In the future, these IDs could even be used to
* allow legacy memory regions to be redefined by the guest as GMRs.
*
* Using the guest framebuffer (GFB) at BAR1 for general purpose DMA
* is being phased out. Please try to use user-defined GMRs whenever
* possible.
*/
#define SVGA_GMR_NULL ((uint32) -1)
#define SVGA_GMR_FRAMEBUFFER ((uint32) -2) // Guest Framebuffer (GFB)
typedef
struct SVGAGuestMemDescriptor {
uint32 ppn;
uint32 numPages;
} SVGAGuestMemDescriptor;
typedef
struct SVGAGuestPtr {
uint32 gmrId;
uint32 offset;
} SVGAGuestPtr;
/*
* SVGAGMRImageFormat --
*
* This is a packed representation of the source 2D image format
* for a GMR-to-screen blit. Currently it is defined as an encoding
* of the screen's color depth and bits-per-pixel, however, 16 bits
* are reserved for future use to identify other encodings (such as
* RGBA or higher-precision images).
*
* Currently supported formats:
*
* bpp depth Format Name
* --- ----- -----------
* 32 24 32-bit BGRX
* 24 24 24-bit BGR
* 16 16 RGB 5-6-5
* 16 15 RGB 5-5-5
*
*/
typedef
struct SVGAGMRImageFormat {
union {
struct {
uint32 bitsPerPixel : 8;
uint32 colorDepth : 8;
uint32 reserved : 16; // Must be zero
};
uint32 value;
};
} SVGAGMRImageFormat;
typedef
struct SVGAGuestImage {
SVGAGuestPtr ptr;
/*
* A note on interpretation of pitch: This value of pitch is the
* number of bytes between vertically adjacent image
* blocks. Normally this is the number of bytes between the first
* pixel of two adjacent scanlines. With compressed textures,
* however, this may represent the number of bytes between
* compression blocks rather than between rows of pixels.
*
* XXX: Compressed textures currently must be tightly packed in guest memory.
*
* If the image is 1-dimensional, pitch is ignored.
*
* If 'pitch' is zero, the SVGA3D device calculates a pitch value
* assuming each row of blocks is tightly packed.
*/
uint32 pitch;
} SVGAGuestImage;
/*
* SVGAColorBGRX --
*
* A 24-bit color format (BGRX), which does not depend on the
* format of the legacy guest framebuffer (GFB) or the current
* GMRFB state.
*/
typedef
struct SVGAColorBGRX {
union {
struct {
uint32 b : 8;
uint32 g : 8;
uint32 r : 8;
uint32 x : 8; // Unused
};
uint32 value;
};
} SVGAColorBGRX;
/*
* SVGASignedRect --
* SVGASignedPoint --
*
* Signed rectangle and point primitives. These are used by the new
* 2D primitives for drawing to Screen Objects, which can occupy a
* signed virtual coordinate space.
*
* SVGASignedRect specifies a half-open interval: the (left, top)
* pixel is part of the rectangle, but the (right, bottom) pixel is
* not.
*/
typedef
struct SVGASignedRect {
int32 left;
int32 top;
int32 right;
int32 bottom;
} SVGASignedRect;
typedef
struct SVGASignedPoint {
int32 x;
int32 y;
} SVGASignedPoint;
/*
* Capabilities
*
* Note the holes in the bitfield. Missing bits have been deprecated,
* and must not be reused. Those capabilities will never be reported
* by new versions of the SVGA device.
*
* SVGA_CAP_GMR2 --
* Provides asynchronous commands to define and remap guest memory
* regions. Adds device registers SVGA_REG_GMRS_MAX_PAGES and
* SVGA_REG_MEMORY_SIZE.
*
* SVGA_CAP_SCREEN_OBJECT_2 --
* Allow screen object support, and require backing stores from the
* guest for each screen object.
*/
#define SVGA_CAP_NONE 0x00000000
#define SVGA_CAP_RECT_COPY 0x00000002
#define SVGA_CAP_CURSOR 0x00000020
#define SVGA_CAP_CURSOR_BYPASS 0x00000040 // Legacy (Use Cursor Bypass 3 instead)
#define SVGA_CAP_CURSOR_BYPASS_2 0x00000080 // Legacy (Use Cursor Bypass 3 instead)
#define SVGA_CAP_8BIT_EMULATION 0x00000100
#define SVGA_CAP_ALPHA_CURSOR 0x00000200
#define SVGA_CAP_3D 0x00004000
#define SVGA_CAP_EXTENDED_FIFO 0x00008000
#define SVGA_CAP_MULTIMON 0x00010000 // Legacy multi-monitor support
#define SVGA_CAP_PITCHLOCK 0x00020000
#define SVGA_CAP_IRQMASK 0x00040000
#define SVGA_CAP_DISPLAY_TOPOLOGY 0x00080000 // Legacy multi-monitor support
#define SVGA_CAP_GMR 0x00100000
#define SVGA_CAP_TRACES 0x00200000
#define SVGA_CAP_GMR2 0x00400000
#define SVGA_CAP_SCREEN_OBJECT_2 0x00800000
/*
* FIFO register indices.
*
* The FIFO is a chunk of device memory mapped into guest physmem. It
* is always treated as 32-bit words.
*
* The guest driver gets to decide how to partition it between
* - FIFO registers (there are always at least 4, specifying where the
* following data area is and how much data it contains; there may be
* more registers following these, depending on the FIFO protocol
* version in use)
* - FIFO data, written by the guest and slurped out by the VMX.
* These indices are 32-bit word offsets into the FIFO.
*/
enum {
/*
* Block 1 (basic registers): The originally defined FIFO registers.
* These exist and are valid for all versions of the FIFO protocol.
*/
SVGA_FIFO_MIN = 0,
SVGA_FIFO_MAX, /* The distance from MIN to MAX must be at least 10K */
SVGA_FIFO_NEXT_CMD,
SVGA_FIFO_STOP,
/*
* Block 2 (extended registers): Mandatory registers for the extended
* FIFO. These exist if the SVGA caps register includes
* SVGA_CAP_EXTENDED_FIFO; some of them are valid only if their
* associated capability bit is enabled.
*
* Note that when originally defined, SVGA_CAP_EXTENDED_FIFO implied
* support only for (FIFO registers) CAPABILITIES, FLAGS, and FENCE.
* This means that the guest has to test individually (in most cases
* using FIFO caps) for the presence of registers after this; the VMX
* can define "extended FIFO" to mean whatever it wants, and currently
* won't enable it unless there's room for that set and much more.
*/
SVGA_FIFO_CAPABILITIES = 4,
SVGA_FIFO_FLAGS,
// Valid with SVGA_FIFO_CAP_FENCE:
SVGA_FIFO_FENCE,
/*
* Block 3a (optional extended registers): Additional registers for the
* extended FIFO, whose presence isn't actually implied by
* SVGA_CAP_EXTENDED_FIFO; these exist if SVGA_FIFO_MIN is high enough to
* leave room for them.
*
* These in block 3a, the VMX currently considers mandatory for the
* extended FIFO.
*/
// Valid if exists (i.e. if extended FIFO enabled):
SVGA_FIFO_3D_HWVERSION, /* See SVGA3dHardwareVersion in svga3d_reg.h */
// Valid with SVGA_FIFO_CAP_PITCHLOCK:
SVGA_FIFO_PITCHLOCK,
// Valid with SVGA_FIFO_CAP_CURSOR_BYPASS_3:
SVGA_FIFO_CURSOR_ON, /* Cursor bypass 3 show/hide register */
SVGA_FIFO_CURSOR_X, /* Cursor bypass 3 x register */
SVGA_FIFO_CURSOR_Y, /* Cursor bypass 3 y register */
SVGA_FIFO_CURSOR_COUNT, /* Incremented when any of the other 3 change */
SVGA_FIFO_CURSOR_LAST_UPDATED,/* Last time the host updated the cursor */
// Valid with SVGA_FIFO_CAP_RESERVE:
SVGA_FIFO_RESERVED, /* Bytes past NEXT_CMD with real contents */
/*
* Valid with SVGA_FIFO_CAP_SCREEN_OBJECT or SVGA_FIFO_CAP_SCREEN_OBJECT_2:
*
* By default this is SVGA_ID_INVALID, to indicate that the cursor
* coordinates are specified relative to the virtual root. If this
* is set to a specific screen ID, cursor position is reinterpreted
* as a signed offset relative to that screen's origin.
*/
SVGA_FIFO_CURSOR_SCREEN_ID,
/*
* Valid with SVGA_FIFO_CAP_DEAD
*
* An arbitrary value written by the host, drivers should not use it.
*/
SVGA_FIFO_DEAD,
/*
* Valid with SVGA_FIFO_CAP_3D_HWVERSION_REVISED:
*
* Contains 3D HWVERSION (see SVGA3dHardwareVersion in svga3d_reg.h)
* on platforms that can enforce graphics resource limits.
*/
SVGA_FIFO_3D_HWVERSION_REVISED,
/*
* XXX: The gap here, up until SVGA_FIFO_3D_CAPS, can be used for new
* registers, but this must be done carefully and with judicious use of
* capability bits, since comparisons based on SVGA_FIFO_MIN aren't
* enough to tell you whether the register exists: we've shipped drivers
* and products that used SVGA_FIFO_3D_CAPS but didn't know about some of
* the earlier ones. The actual order of introduction was:
* - PITCHLOCK
* - 3D_CAPS
* - CURSOR_* (cursor bypass 3)
* - RESERVED
* So, code that wants to know whether it can use any of the
* aforementioned registers, or anything else added after PITCHLOCK and
* before 3D_CAPS, needs to reason about something other than
* SVGA_FIFO_MIN.
*/
/*
* 3D caps block space; valid with 3D hardware version >=
* SVGA3D_HWVERSION_WS6_B1.
*/
SVGA_FIFO_3D_CAPS = 32,
SVGA_FIFO_3D_CAPS_LAST = 32 + 255,
/*
* End of VMX's current definition of "extended-FIFO registers".
* Registers before here are always enabled/disabled as a block; either
* the extended FIFO is enabled and includes all preceding registers, or
* it's disabled entirely.
*
* Block 3b (truly optional extended registers): Additional registers for
* the extended FIFO, which the VMX already knows how to enable and
* disable with correct granularity.
*
* Registers after here exist if and only if the guest SVGA driver
* sets SVGA_FIFO_MIN high enough to leave room for them.
*/
// Valid if register exists:
SVGA_FIFO_GUEST_3D_HWVERSION, /* Guest driver's 3D version */
SVGA_FIFO_FENCE_GOAL, /* Matching target for SVGA_IRQFLAG_FENCE_GOAL */
SVGA_FIFO_BUSY, /* See "FIFO Synchronization Registers" */
/*
* Always keep this last. This defines the maximum number of
* registers we know about. At power-on, this value is placed in
* the SVGA_REG_MEM_REGS register, and we expect the guest driver
* to allocate this much space in FIFO memory for registers.
*/
SVGA_FIFO_NUM_REGS
};
/*
* Definition of registers included in extended FIFO support.
*
* The guest SVGA driver gets to allocate the FIFO between registers
* and data. It must always allocate at least 4 registers, but old
* drivers stopped there.
*
* The VMX will enable extended FIFO support if and only if the guest
* left enough room for all registers defined as part of the mandatory
* set for the extended FIFO.
*
* Note that the guest drivers typically allocate the FIFO only at
* initialization time, not at mode switches, so it's likely that the
* number of FIFO registers won't change without a reboot.
*
* All registers less than this value are guaranteed to be present if
* svgaUser->fifo.extended is set. Any later registers must be tested
* individually for compatibility at each use (in the VMX).
*
* This value is used only by the VMX, so it can change without
* affecting driver compatibility; keep it that way?
*/
#define SVGA_FIFO_EXTENDED_MANDATORY_REGS (SVGA_FIFO_3D_CAPS_LAST + 1)
/*
* FIFO Synchronization Registers
*
* This explains the relationship between the various FIFO
* sync-related registers in IOSpace and in FIFO space.
*
* SVGA_REG_SYNC --
*
* The SYNC register can be used in two different ways by the guest:
*
* 1. If the guest wishes to fully sync (drain) the FIFO,
* it will write once to SYNC then poll on the BUSY
* register. The FIFO is sync'ed once BUSY is zero.
*
* 2. If the guest wants to asynchronously wake up the host,
* it will write once to SYNC without polling on BUSY.
* Ideally it will do this after some new commands have
* been placed in the FIFO, and after reading a zero
* from SVGA_FIFO_BUSY.
*
* (1) is the original behaviour that SYNC was designed to
* support. Originally, a write to SYNC would implicitly
* trigger a read from BUSY. This causes us to synchronously
* process the FIFO.
*
* This behaviour has since been changed so that writing SYNC
* will *not* implicitly cause a read from BUSY. Instead, it
* makes a channel call which asynchronously wakes up the MKS
* thread.
*
* New guests can use this new behaviour to implement (2)
* efficiently. This lets guests get the host's attention
* without waiting for the MKS to poll, which gives us much
* better CPU utilization on SMP hosts and on UP hosts while
* we're blocked on the host GPU.
*
* Old guests shouldn't notice the behaviour change. SYNC was
* never guaranteed to process the entire FIFO, since it was
* bounded to a particular number of CPU cycles. Old guests will
* still loop on the BUSY register until the FIFO is empty.
*
* Writing to SYNC currently has the following side-effects:
*
* - Sets SVGA_REG_BUSY to TRUE (in the monitor)
* - Asynchronously wakes up the MKS thread for FIFO processing
* - The value written to SYNC is recorded as a "reason", for
* stats purposes.
*
* If SVGA_FIFO_BUSY is available, drivers are advised to only
* write to SYNC if SVGA_FIFO_BUSY is FALSE. Drivers should set
* SVGA_FIFO_BUSY to TRUE after writing to SYNC. The MKS will
* eventually set SVGA_FIFO_BUSY on its own, but this approach
* lets the driver avoid sending multiple asynchronous wakeup
* messages to the MKS thread.
*
* SVGA_REG_BUSY --
*
* This register is set to TRUE when SVGA_REG_SYNC is written,
* and it reads as FALSE when the FIFO has been completely
* drained.
*
* Every read from this register causes us to synchronously
* process FIFO commands. There is no guarantee as to how many
* commands each read will process.
*
* CPU time spent processing FIFO commands will be billed to
* the guest.
*
* New drivers should avoid using this register unless they
* need to guarantee that the FIFO is completely drained. It
* is overkill for performing a sync-to-fence. Older drivers
* will use this register for any type of synchronization.
*
* SVGA_FIFO_BUSY --
*
* This register is a fast way for the guest driver to check
* whether the FIFO is already being processed. It reads and
* writes at normal RAM speeds, with no monitor intervention.
*
* If this register reads as TRUE, the host is guaranteeing that
* any new commands written into the FIFO will be noticed before
* the MKS goes back to sleep.
*
* If this register reads as FALSE, no such guarantee can be
* made.
*
* The guest should use this register to quickly determine
* whether or not it needs to wake up the host. If the guest
* just wrote a command or group of commands that it would like
* the host to begin processing, it should:
*
* 1. Read SVGA_FIFO_BUSY. If it reads as TRUE, no further
* action is necessary.
*
* 2. Write TRUE to SVGA_FIFO_BUSY. This informs future guest
* code that we've already sent a SYNC to the host and we
* don't need to send a duplicate.
*
* 3. Write a reason to SVGA_REG_SYNC. This will send an
* asynchronous wakeup to the MKS thread.
*/
/*
* FIFO Capabilities
*
* Fence -- Fence register and command are supported
* Accel Front -- Front buffer only commands are supported
* Pitch Lock -- Pitch lock register is supported
* Video -- SVGA Video overlay units are supported
* Escape -- Escape command is supported
*
* XXX: Add longer descriptions for each capability, including a list
* of the new features that each capability provides.
*
* SVGA_FIFO_CAP_SCREEN_OBJECT --
*
* Provides dynamic multi-screen rendering, for improved Unity and
* multi-monitor modes. With Screen Object, the guest can
* dynamically create and destroy 'screens', which can represent
* Unity windows or virtual monitors. Screen Object also provides
* strong guarantees that DMA operations happen only when
* guest-initiated. Screen Object deprecates the BAR1 guest
* framebuffer (GFB) and all commands that work only with the GFB.
*
* New registers:
* FIFO_CURSOR_SCREEN_ID, VIDEO_DATA_GMRID, VIDEO_DST_SCREEN_ID
*
* New 2D commands:
* DEFINE_SCREEN, DESTROY_SCREEN, DEFINE_GMRFB, BLIT_GMRFB_TO_SCREEN,
* BLIT_SCREEN_TO_GMRFB, ANNOTATION_FILL, ANNOTATION_COPY
*
* New 3D commands:
* BLIT_SURFACE_TO_SCREEN
*
* New guarantees:
*
* - The host will not read or write guest memory, including the GFB,
* except when explicitly initiated by a DMA command.
*
* - All DMA, including legacy DMA like UPDATE and PRESENT_READBACK,
* is guaranteed to complete before any subsequent FENCEs.
*
* - All legacy commands which affect a Screen (UPDATE, PRESENT,
* PRESENT_READBACK) as well as new Screen blit commands will
* all behave consistently as blits, and memory will be read
* or written in FIFO order.
*
* For example, if you PRESENT from one SVGA3D surface to multiple
* places on the screen, the data copied will always be from the
* SVGA3D surface at the time the PRESENT was issued in the FIFO.
* This was not necessarily true on devices without Screen Object.
*
* This means that on devices that support Screen Object, the
* PRESENT_READBACK command should not be necessary unless you
* actually want to read back the results of 3D rendering into
* system memory. (And for that, the BLIT_SCREEN_TO_GMRFB
* command provides a strict superset of functionality.)
*
* - When a screen is resized, either using Screen Object commands or
* legacy multimon registers, its contents are preserved.
*
* SVGA_FIFO_CAP_GMR2 --
*
* Provides new commands to define and remap guest memory regions (GMR).
*
* New 2D commands:
* DEFINE_GMR2, REMAP_GMR2.
*
* SVGA_FIFO_CAP_3D_HWVERSION_REVISED --
*
* Indicates new register SVGA_FIFO_3D_HWVERSION_REVISED exists.
* This register may replace SVGA_FIFO_3D_HWVERSION on platforms
* that enforce graphics resource limits. This allows the platform
* to clear SVGA_FIFO_3D_HWVERSION and disable 3D in legacy guest
* drivers that do not limit their resources.
*
* Note this is an alias to SVGA_FIFO_CAP_GMR2 because these indicators
* are codependent (and thus we use a single capability bit).
*
* SVGA_FIFO_CAP_SCREEN_OBJECT_2 --
*
* Modifies the DEFINE_SCREEN command to include a guest provided
* backing store in GMR memory and the bytesPerLine for the backing
* store. This capability requires the use of a backing store when
* creating screen objects. However if SVGA_FIFO_CAP_SCREEN_OBJECT
* is present then backing stores are optional.
*
* SVGA_FIFO_CAP_DEAD --
*
* Drivers should not use this cap bit. This cap bit can not be
* reused since some hosts already expose it.
*/
#define SVGA_FIFO_CAP_NONE 0
#define SVGA_FIFO_CAP_FENCE (1<<0)
#define SVGA_FIFO_CAP_ACCELFRONT (1<<1)
#define SVGA_FIFO_CAP_PITCHLOCK (1<<2)
#define SVGA_FIFO_CAP_VIDEO (1<<3)
#define SVGA_FIFO_CAP_CURSOR_BYPASS_3 (1<<4)
#define SVGA_FIFO_CAP_ESCAPE (1<<5)
#define SVGA_FIFO_CAP_RESERVE (1<<6)
#define SVGA_FIFO_CAP_SCREEN_OBJECT (1<<7)
#define SVGA_FIFO_CAP_GMR2 (1<<8)
#define SVGA_FIFO_CAP_3D_HWVERSION_REVISED SVGA_FIFO_CAP_GMR2
#define SVGA_FIFO_CAP_SCREEN_OBJECT_2 (1<<9)
#define SVGA_FIFO_CAP_DEAD (1<<10)
/*
* FIFO Flags
*
* Accel Front -- Driver should use front buffer only commands
*/
#define SVGA_FIFO_FLAG_NONE 0
#define SVGA_FIFO_FLAG_ACCELFRONT (1<<0)
#define SVGA_FIFO_FLAG_RESERVED (1<<31) // Internal use only
/*
* FIFO reservation sentinel value
*/
#define SVGA_FIFO_RESERVED_UNKNOWN 0xffffffff
/*
* Video overlay support
*/
#define SVGA_NUM_OVERLAY_UNITS 32
/*
* Video capabilities that the guest is currently using
*/
#define SVGA_VIDEO_FLAG_COLORKEY 0x0001
/*
* Offsets for the video overlay registers
*/
enum {
SVGA_VIDEO_ENABLED = 0,
SVGA_VIDEO_FLAGS,
SVGA_VIDEO_DATA_OFFSET,
SVGA_VIDEO_FORMAT,
SVGA_VIDEO_COLORKEY,
SVGA_VIDEO_SIZE, // Deprecated
SVGA_VIDEO_WIDTH,
SVGA_VIDEO_HEIGHT,
SVGA_VIDEO_SRC_X,
SVGA_VIDEO_SRC_Y,
SVGA_VIDEO_SRC_WIDTH,
SVGA_VIDEO_SRC_HEIGHT,
SVGA_VIDEO_DST_X, // Signed int32
SVGA_VIDEO_DST_Y, // Signed int32
SVGA_VIDEO_DST_WIDTH,
SVGA_VIDEO_DST_HEIGHT,
SVGA_VIDEO_PITCH_1,
SVGA_VIDEO_PITCH_2,
SVGA_VIDEO_PITCH_3,
SVGA_VIDEO_DATA_GMRID, // Optional, defaults to SVGA_GMR_FRAMEBUFFER
SVGA_VIDEO_DST_SCREEN_ID, // Optional, defaults to virtual coords (SVGA_ID_INVALID)
SVGA_VIDEO_NUM_REGS
};
/*
* SVGA Overlay Units
*
* width and height relate to the entire source video frame.
* srcX, srcY, srcWidth and srcHeight represent subset of the source
* video frame to be displayed.
*/
typedef struct SVGAOverlayUnit {
uint32 enabled;
uint32 flags;
uint32 dataOffset;
uint32 format;
uint32 colorKey;
uint32 size;
uint32 width;
uint32 height;
uint32 srcX;
uint32 srcY;
uint32 srcWidth;
uint32 srcHeight;
int32 dstX;
int32 dstY;
uint32 dstWidth;
uint32 dstHeight;
uint32 pitches[3];
uint32 dataGMRId;
uint32 dstScreenId;
} SVGAOverlayUnit;
/*
* SVGAScreenObject --
*
* This is a new way to represent a guest's multi-monitor screen or
* Unity window. Screen objects are only supported if the
* SVGA_FIFO_CAP_SCREEN_OBJECT capability bit is set.
*
* If Screen Objects are supported, they can be used to fully
* replace the functionality provided by the framebuffer registers
* (SVGA_REG_WIDTH, HEIGHT, etc.) and by SVGA_CAP_DISPLAY_TOPOLOGY.
*
* The screen object is a struct with guaranteed binary
* compatibility. New flags can be added, and the struct may grow,
* but existing fields must retain their meaning.
*
* Added with SVGA_FIFO_CAP_SCREEN_OBJECT_2 are required fields of
* a SVGAGuestPtr that is used to back the screen contents. This
* memory must come from the GFB. The guest is not allowed to
* access the memory and doing so will have undefined results. The
* backing store is required to be page aligned and the size is
* padded to the next page boundry. The number of pages is:
* (bytesPerLine * size.width * 4 + PAGE_SIZE - 1) / PAGE_SIZE
*
* The pitch in the backingStore is required to be at least large
* enough to hold a 32bbp scanline. It is recommended that the
* driver pad bytesPerLine for a potential performance win.
*
* The cloneCount field is treated as a hint from the guest that
* the user wants this display to be cloned, countCount times. A
* value of zero means no cloning should happen.
*/
#define SVGA_SCREEN_MUST_BE_SET (1 << 0) // Must be set or results undefined
#define SVGA_SCREEN_HAS_ROOT SVGA_SCREEN_MUST_BE_SET // Deprecated
#define SVGA_SCREEN_IS_PRIMARY (1 << 1) // Guest considers this screen to be 'primary'
#define SVGA_SCREEN_FULLSCREEN_HINT (1 << 2) // Guest is running a fullscreen app here
/*
* Added with SVGA_FIFO_CAP_SCREEN_OBJECT_2. When the screen is
* deactivated the base layer is defined to lose all contents and
* become black. When a screen is deactivated the backing store is
* optional. When set backingPtr and bytesPerLine will be ignored.
*/
#define SVGA_SCREEN_DEACTIVATE (1 << 3)
/*
* Added with SVGA_FIFO_CAP_SCREEN_OBJECT_2. When this flag is set
* the screen contents will be outputted as all black to the user
* though the base layer contents is preserved. The screen base layer
* can still be read and written to like normal though the no visible
* effect will be seen by the user. When the flag is changed the
* screen will be blanked or redrawn to the current contents as needed
* without any extra commands from the driver. This flag only has an
* effect when the screen is not deactivated.
*/
#define SVGA_SCREEN_BLANKING (1 << 4)
typedef
struct SVGAScreenObject {
uint32 structSize; // sizeof(SVGAScreenObject)
uint32 id;
uint32 flags;
struct {
uint32 width;
uint32 height;
} size;
struct {
int32 x;
int32 y;
} root;
/*
* Added and required by SVGA_FIFO_CAP_SCREEN_OBJECT_2, optional
* with SVGA_FIFO_CAP_SCREEN_OBJECT.
*/
SVGAGuestImage backingStore;
uint32 cloneCount;
} SVGAScreenObject;
/*
* Commands in the command FIFO:
*
* Command IDs defined below are used for the traditional 2D FIFO
* communication (not all commands are available for all versions of the
* SVGA FIFO protocol).
*
* Note the holes in the command ID numbers: These commands have been
* deprecated, and the old IDs must not be reused.
*
* Command IDs from 1000 to 1999 are reserved for use by the SVGA3D
* protocol.
*
* Each command's parameters are described by the comments and
* structs below.
*/
typedef enum {
SVGA_CMD_INVALID_CMD = 0,
SVGA_CMD_UPDATE = 1,
SVGA_CMD_RECT_COPY = 3,
SVGA_CMD_DEFINE_CURSOR = 19,
SVGA_CMD_DEFINE_ALPHA_CURSOR = 22,
SVGA_CMD_UPDATE_VERBOSE = 25,
SVGA_CMD_FRONT_ROP_FILL = 29,
SVGA_CMD_FENCE = 30,
SVGA_CMD_ESCAPE = 33,
SVGA_CMD_DEFINE_SCREEN = 34,
SVGA_CMD_DESTROY_SCREEN = 35,
SVGA_CMD_DEFINE_GMRFB = 36,
SVGA_CMD_BLIT_GMRFB_TO_SCREEN = 37,
SVGA_CMD_BLIT_SCREEN_TO_GMRFB = 38,
SVGA_CMD_ANNOTATION_FILL = 39,
SVGA_CMD_ANNOTATION_COPY = 40,
SVGA_CMD_DEFINE_GMR2 = 41,
SVGA_CMD_REMAP_GMR2 = 42,
SVGA_CMD_MAX
} SVGAFifoCmdId;
#define SVGA_CMD_MAX_DATASIZE (256 * 1024)
#define SVGA_CMD_MAX_ARGS 64
/*
* SVGA_CMD_UPDATE --
*
* This is a DMA transfer which copies from the Guest Framebuffer
* (GFB) at BAR1 + SVGA_REG_FB_OFFSET to any screens which
* intersect with the provided virtual rectangle.
*
* This command does not support using arbitrary guest memory as a
* data source- it only works with the pre-defined GFB memory.
* This command also does not support signed virtual coordinates.
* If you have defined screens (using SVGA_CMD_DEFINE_SCREEN) with
* negative root x/y coordinates, the negative portion of those
* screens will not be reachable by this command.
*
* This command is not necessary when using framebuffer
* traces. Traces are automatically enabled if the SVGA FIFO is
* disabled, and you may explicitly enable/disable traces using
* SVGA_REG_TRACES. With traces enabled, any write to the GFB will
* automatically act as if a subsequent SVGA_CMD_UPDATE was issued.
*
* Traces and SVGA_CMD_UPDATE are the only supported ways to render
* pseudocolor screen updates. The newer Screen Object commands
* only support true color formats.
*
* Availability:
* Always available.
*/
typedef
struct {
uint32 x;
uint32 y;
uint32 width;
uint32 height;
} SVGAFifoCmdUpdate;
/*
* SVGA_CMD_RECT_COPY --
*
* Perform a rectangular DMA transfer from one area of the GFB to
* another, and copy the result to any screens which intersect it.
*
* Availability:
* SVGA_CAP_RECT_COPY
*/
typedef
struct {
uint32 srcX;
uint32 srcY;
uint32 destX;
uint32 destY;
uint32 width;
uint32 height;
} SVGAFifoCmdRectCopy;
/*
* SVGA_CMD_DEFINE_CURSOR --
*
* Provide a new cursor image, as an AND/XOR mask.
*
* The recommended way to position the cursor overlay is by using
* the SVGA_FIFO_CURSOR_* registers, supported by the
* SVGA_FIFO_CAP_CURSOR_BYPASS_3 capability.
*
* Availability:
* SVGA_CAP_CURSOR
*/
typedef
struct {
uint32 id; // Reserved, must be zero.
uint32 hotspotX;
uint32 hotspotY;
uint32 width;
uint32 height;
uint32 andMaskDepth; // Value must be 1 or equal to BITS_PER_PIXEL
uint32 xorMaskDepth; // Value must be 1 or equal to BITS_PER_PIXEL
/*
* Followed by scanline data for AND mask, then XOR mask.
* Each scanline is padded to a 32-bit boundary.
*/
} SVGAFifoCmdDefineCursor;
/*
* SVGA_CMD_DEFINE_ALPHA_CURSOR --
*
* Provide a new cursor image, in 32-bit BGRA format.
*
* The recommended way to position the cursor overlay is by using
* the SVGA_FIFO_CURSOR_* registers, supported by the
* SVGA_FIFO_CAP_CURSOR_BYPASS_3 capability.
*
* Availability:
* SVGA_CAP_ALPHA_CURSOR
*/
typedef
struct {
uint32 id; // Reserved, must be zero.
uint32 hotspotX;
uint32 hotspotY;
uint32 width;
uint32 height;
/* Followed by scanline data */
} SVGAFifoCmdDefineAlphaCursor;
/*
* SVGA_CMD_UPDATE_VERBOSE --
*
* Just like SVGA_CMD_UPDATE, but also provide a per-rectangle
* 'reason' value, an opaque cookie which is used by internal
* debugging tools. Third party drivers should not use this
* command.
*
* Availability:
* SVGA_CAP_EXTENDED_FIFO
*/
typedef
struct {
uint32 x;
uint32 y;
uint32 width;
uint32 height;
uint32 reason;
} SVGAFifoCmdUpdateVerbose;
/*
* SVGA_CMD_FRONT_ROP_FILL --
*
* This is a hint which tells the SVGA device that the driver has
* just filled a rectangular region of the GFB with a solid
* color. Instead of reading these pixels from the GFB, the device
* can assume that they all equal 'color'. This is primarily used
* for remote desktop protocols.
*
* Availability:
* SVGA_FIFO_CAP_ACCELFRONT
*/
#define SVGA_ROP_COPY 0x03
typedef
struct {
uint32 color; // In the same format as the GFB
uint32 x;
uint32 y;
uint32 width;
uint32 height;
uint32 rop; // Must be SVGA_ROP_COPY
} SVGAFifoCmdFrontRopFill;
/*
* SVGA_CMD_FENCE --
*
* Insert a synchronization fence. When the SVGA device reaches
* this command, it will copy the 'fence' value into the
* SVGA_FIFO_FENCE register. It will also compare the fence against
* SVGA_FIFO_FENCE_GOAL. If the fence matches the goal and the
* SVGA_IRQFLAG_FENCE_GOAL interrupt is enabled, the device will
* raise this interrupt.
*
* Availability:
* SVGA_FIFO_FENCE for this command,
* SVGA_CAP_IRQMASK for SVGA_FIFO_FENCE_GOAL.
*/
typedef
struct {
uint32 fence;
} SVGAFifoCmdFence;
/*
* SVGA_CMD_ESCAPE --
*
* Send an extended or vendor-specific variable length command.
* This is used for video overlay, third party plugins, and
* internal debugging tools. See svga_escape.h
*
* Availability:
* SVGA_FIFO_CAP_ESCAPE
*/
typedef
struct {
uint32 nsid;
uint32 size;
/* followed by 'size' bytes of data */
} SVGAFifoCmdEscape;
/*
* SVGA_CMD_DEFINE_SCREEN --
*
* Define or redefine an SVGAScreenObject. See the description of
* SVGAScreenObject above. The video driver is responsible for
* generating new screen IDs. They should be small positive
* integers. The virtual device will have an implementation
* specific upper limit on the number of screen IDs
* supported. Drivers are responsible for recycling IDs. The first
* valid ID is zero.
*
* - Interaction with other registers:
*
* For backwards compatibility, when the GFB mode registers (WIDTH,
* HEIGHT, PITCHLOCK, BITS_PER_PIXEL) are modified, the SVGA device
* deletes all screens other than screen #0, and redefines screen
* #0 according to the specified mode. Drivers that use
* SVGA_CMD_DEFINE_SCREEN should destroy or redefine screen #0.
*
* If you use screen objects, do not use the legacy multi-mon
* registers (SVGA_REG_NUM_GUEST_DISPLAYS, SVGA_REG_DISPLAY_*).
*
* Availability:
* SVGA_FIFO_CAP_SCREEN_OBJECT or SVGA_FIFO_CAP_SCREEN_OBJECT_2
*/
typedef
struct {
SVGAScreenObject screen; // Variable-length according to version
} SVGAFifoCmdDefineScreen;
/*
* SVGA_CMD_DESTROY_SCREEN --
*
* Destroy an SVGAScreenObject. Its ID is immediately available for
* re-use.
*
* Availability:
* SVGA_FIFO_CAP_SCREEN_OBJECT or SVGA_FIFO_CAP_SCREEN_OBJECT_2
*/
typedef
struct {
uint32 screenId;
} SVGAFifoCmdDestroyScreen;
/*
* SVGA_CMD_DEFINE_GMRFB --
*
* This command sets a piece of SVGA device state called the
* Guest Memory Region Framebuffer, or GMRFB. The GMRFB is a
* piece of light-weight state which identifies the location and
* format of an image in guest memory or in BAR1. The GMRFB has
* an arbitrary size, and it doesn't need to match the geometry
* of the GFB or any screen object.
*
* The GMRFB can be redefined as often as you like. You could
* always use the same GMRFB, you could redefine it before
* rendering from a different guest screen, or you could even
* redefine it before every blit.
*
* There are multiple ways to use this command. The simplest way is
* to use it to move the framebuffer either to elsewhere in the GFB
* (BAR1) memory region, or to a user-defined GMR. This lets a
* driver use a framebuffer allocated entirely out of normal system
* memory, which we encourage.
*
* Another way to use this command is to set up a ring buffer of
* updates in GFB memory. If a driver wants to ensure that no
* frames are skipped by the SVGA device, it is important that the
* driver not modify the source data for a blit until the device is
* done processing the command. One efficient way to accomplish
* this is to use a ring of small DMA buffers. Each buffer is used
* for one blit, then we move on to the next buffer in the
* ring. The FENCE mechanism is used to protect each buffer from
* re-use until the device is finished with that buffer's
* corresponding blit.
*
* This command does not affect the meaning of SVGA_CMD_UPDATE.
* UPDATEs always occur from the legacy GFB memory area. This
* command has no support for pseudocolor GMRFBs. Currently only
* true-color 15, 16, and 24-bit depths are supported. Future
* devices may expose capabilities for additional framebuffer
* formats.
*
* The default GMRFB value is undefined. Drivers must always send
* this command at least once before performing any blit from the
* GMRFB.
*
* Availability:
* SVGA_FIFO_CAP_SCREEN_OBJECT or SVGA_FIFO_CAP_SCREEN_OBJECT_2
*/
typedef
struct {
SVGAGuestPtr ptr;
uint32 bytesPerLine;
SVGAGMRImageFormat format;
} SVGAFifoCmdDefineGMRFB;
/*
* SVGA_CMD_BLIT_GMRFB_TO_SCREEN --
*
* This is a guest-to-host blit. It performs a DMA operation to
* copy a rectangular region of pixels from the current GMRFB to
* one or more Screen Objects.
*
* The destination coordinate may be specified relative to a
* screen's origin (if a screen ID is specified) or relative to the
* virtual coordinate system's origin (if the screen ID is
* SVGA_ID_INVALID). The actual destination may span zero or more
* screens, in the case of a virtual destination rect or a rect
* which extends off the edge of the specified screen.
*
* This command writes to the screen's "base layer": the underlying
* framebuffer which exists below any cursor or video overlays. No
* action is necessary to explicitly hide or update any overlays
* which exist on top of the updated region.
*
* The SVGA device is guaranteed to finish reading from the GMRFB
* by the time any subsequent FENCE commands are reached.
*
* This command consumes an annotation. See the
* SVGA_CMD_ANNOTATION_* commands for details.
*
* Availability:
* SVGA_FIFO_CAP_SCREEN_OBJECT or SVGA_FIFO_CAP_SCREEN_OBJECT_2
*/
typedef
struct {
SVGASignedPoint srcOrigin;
SVGASignedRect destRect;
uint32 destScreenId;
} SVGAFifoCmdBlitGMRFBToScreen;
/*
* SVGA_CMD_BLIT_SCREEN_TO_GMRFB --
*
* This is a host-to-guest blit. It performs a DMA operation to
* copy a rectangular region of pixels from a single Screen Object
* back to the current GMRFB.
*
* Usage note: This command should be used rarely. It will
* typically be inefficient, but it is necessary for some types of
* synchronization between 3D (GPU) and 2D (CPU) rendering into
* overlapping areas of a screen.
*
* The source coordinate is specified relative to a screen's
* origin. The provided screen ID must be valid. If any parameters
* are invalid, the resulting pixel values are undefined.
*
* This command reads the screen's "base layer". Overlays like
* video and cursor are not included, but any data which was sent
* using a blit-to-screen primitive will be available, no matter
* whether the data's original source was the GMRFB or the 3D
* acceleration hardware.
*
* Note that our guest-to-host blits and host-to-guest blits aren't
* symmetric in their current implementation. While the parameters
* are identical, host-to-guest blits are a lot less featureful.
* They do not support clipping: If the source parameters don't
* fully fit within a screen, the blit fails. They must originate
* from exactly one screen. Virtual coordinates are not directly
* supported.
*
* Host-to-guest blits do support the same set of GMRFB formats
* offered by guest-to-host blits.
*
* The SVGA device is guaranteed to finish writing to the GMRFB by
* the time any subsequent FENCE commands are reached.
*
* Availability:
* SVGA_FIFO_CAP_SCREEN_OBJECT or SVGA_FIFO_CAP_SCREEN_OBJECT_2
*/
typedef
struct {
SVGASignedPoint destOrigin;
SVGASignedRect srcRect;
uint32 srcScreenId;
} SVGAFifoCmdBlitScreenToGMRFB;
/*
* SVGA_CMD_ANNOTATION_FILL --
*
* This is a blit annotation. This command stores a small piece of
* device state which is consumed by the next blit-to-screen
* command. The state is only cleared by commands which are
* specifically documented as consuming an annotation. Other
* commands (such as ESCAPEs for debugging) may intervene between
* the annotation and its associated blit.
*
* This annotation is a promise about the contents of the next
* blit: The video driver is guaranteeing that all pixels in that
* blit will have the same value, specified here as a color in
* SVGAColorBGRX format.
*
* The SVGA device can still render the blit correctly even if it
* ignores this annotation, but the annotation may allow it to
* perform the blit more efficiently, for example by ignoring the
* source data and performing a fill in hardware.
*
* This annotation is most important for performance when the
* user's display is being remoted over a network connection.
*
* Availability:
* SVGA_FIFO_CAP_SCREEN_OBJECT or SVGA_FIFO_CAP_SCREEN_OBJECT_2
*/
typedef
struct {
SVGAColorBGRX color;
} SVGAFifoCmdAnnotationFill;
/*
* SVGA_CMD_ANNOTATION_COPY --
*
* This is a blit annotation. See SVGA_CMD_ANNOTATION_FILL for more
* information about annotations.
*
* This annotation is a promise about the contents of the next
* blit: The video driver is guaranteeing that all pixels in that
* blit will have the same value as those which already exist at an
* identically-sized region on the same or a different screen.
*
* Note that the source pixels for the COPY in this annotation are
* sampled before applying the anqnotation's associated blit. They
* are allowed to overlap with the blit's destination pixels.
*
* The copy source rectangle is specified the same way as the blit
* destination: it can be a rectangle which spans zero or more
* screens, specified relative to either a screen or to the virtual
* coordinate system's origin. If the source rectangle includes
* pixels which are not from exactly one screen, the results are
* undefined.
*
* Availability:
* SVGA_FIFO_CAP_SCREEN_OBJECT or SVGA_FIFO_CAP_SCREEN_OBJECT_2
*/
typedef
struct {
SVGASignedPoint srcOrigin;
uint32 srcScreenId;
} SVGAFifoCmdAnnotationCopy;
/*
* SVGA_CMD_DEFINE_GMR2 --
*
* Define guest memory region v2. See the description of GMRs above.
*
* Availability:
* SVGA_CAP_GMR2
*/
typedef
struct {
uint32 gmrId;
uint32 numPages;
}
SVGAFifoCmdDefineGMR2;
/*
* SVGA_CMD_REMAP_GMR2 --
*
* Remap guest memory region v2. See the description of GMRs above.
*
* This command allows guest to modify a portion of an existing GMR by
* invalidating it or reassigning it to different guest physical pages.
* The pages are identified by physical page number (PPN). The pages
* are assumed to be pinned and valid for DMA operations.
*
* Description of command flags:
*
* SVGA_REMAP_GMR2_VIA_GMR: If enabled, references a PPN list in a GMR.
* The PPN list must not overlap with the remap region (this can be
* handled trivially by referencing a separate GMR). If flag is
* disabled, PPN list is appended to SVGARemapGMR command.
*
* SVGA_REMAP_GMR2_PPN64: If set, PPN list is in PPN64 format, otherwise
* it is in PPN32 format.
*
* SVGA_REMAP_GMR2_SINGLE_PPN: If set, PPN list contains a single entry.
* A single PPN can be used to invalidate a portion of a GMR or
* map it to to a single guest scratch page.
*
* Availability:
* SVGA_CAP_GMR2
*/
typedef enum {
SVGA_REMAP_GMR2_PPN32 = 0,
SVGA_REMAP_GMR2_VIA_GMR = (1 << 0),
SVGA_REMAP_GMR2_PPN64 = (1 << 1),
SVGA_REMAP_GMR2_SINGLE_PPN = (1 << 2),
} SVGARemapGMR2Flags;
typedef
struct {
uint32 gmrId;
SVGARemapGMR2Flags flags;
uint32 offsetPages; // offset in pages to begin remap
uint32 numPages; // number of pages to remap
/*
* Followed by additional data depending on SVGARemapGMR2Flags.
*
* If flag SVGA_REMAP_GMR2_VIA_GMR is set, single SVGAGuestPtr follows.
* Otherwise an array of page descriptors in PPN32 or PPN64 format
* (according to flag SVGA_REMAP_GMR2_PPN64) follows. If flag
* SVGA_REMAP_GMR2_SINGLE_PPN is set, array contains a single entry.
*/
}
SVGAFifoCmdRemapGMR2;
#endif
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