[PATCH 04/28] vmwgfx: Update device headers for command buffers.
Thomas Hellstrom
thellstrom at vmware.com
Wed Aug 12 22:42:53 PDT 2015
Signed-off-by: Thomas Hellstrom <thellstrom at vmware.com>
Reviewed-by: Sinclair Yeh <syeh at vmware.com>
---
drivers/gpu/drm/vmwgfx/svga3d_reg.h | 2 -
drivers/gpu/drm/vmwgfx/svga_reg.h | 187 ++++++++++++++++++++++++++++++++++++
drivers/gpu/drm/vmwgfx/svga_types.h | 3 +
3 files changed, 190 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/vmwgfx/svga3d_reg.h b/drivers/gpu/drm/vmwgfx/svga3d_reg.h
index f58dc7d..e50d20c 100644
--- a/drivers/gpu/drm/vmwgfx/svga3d_reg.h
+++ b/drivers/gpu/drm/vmwgfx/svga3d_reg.h
@@ -1928,8 +1928,6 @@ struct {
* Guest-backed surface definitions.
*/
-typedef uint32 SVGAMobId;
-
typedef enum SVGAMobFormat {
SVGA3D_MOBFMT_INVALID = SVGA3D_INVALID_ID,
SVGA3D_MOBFMT_PTDEPTH_0 = 0,
diff --git a/drivers/gpu/drm/vmwgfx/svga_reg.h b/drivers/gpu/drm/vmwgfx/svga_reg.h
index e4259c2..3763d5b 100644
--- a/drivers/gpu/drm/vmwgfx/svga_reg.h
+++ b/drivers/gpu/drm/vmwgfx/svga_reg.h
@@ -106,6 +106,8 @@
#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 */
+#define SVGA_IRQFLAG_COMMAND_BUFFER 0x8 /* Command buffer completed */
+#define SVGA_IRQFLAG_ERROR 0x10 /* Error while processing commands */
/*
* Registers
@@ -299,6 +301,190 @@ struct SVGAGuestPtr {
uint32 offset;
} SVGAGuestPtr;
+/*
+ * Register based command buffers --
+ *
+ * Provide an SVGA device interface that allows the guest to submit
+ * command buffers to the SVGA device through an SVGA device register.
+ * The metadata for each command buffer is contained in the
+ * SVGACBHeader structure along with the return status codes.
+ *
+ * The SVGA device supports command buffers if
+ * SVGA_CAP_COMMAND_BUFFERS is set in the device caps register. The
+ * fifo must be enabled for command buffers to be submitted.
+ *
+ * Command buffers are submitted when the guest writing the 64 byte
+ * aligned physical address into the SVGA_REG_COMMAND_LOW and
+ * SVGA_REG_COMMAND_HIGH. SVGA_REG_COMMAND_HIGH contains the upper 32
+ * bits of the physical address. SVGA_REG_COMMAND_LOW contains the
+ * lower 32 bits of the physical address, since the command buffer
+ * headers are required to be 64 byte aligned the lower 6 bits are
+ * used for the SVGACBContext value. Writing to SVGA_REG_COMMAND_LOW
+ * submits the command buffer to the device and queues it for
+ * execution. The SVGA device supports at least
+ * SVGA_CB_MAX_QUEUED_PER_CONTEXT command buffers that can be queued
+ * per context and if that limit is reached the device will write the
+ * status SVGA_CB_STATUS_QUEUE_FULL to the status value of the command
+ * buffer header synchronously and not raise any IRQs.
+ *
+ * It is invalid to submit a command buffer without a valid physical
+ * address and results are undefined.
+ *
+ * The device guarantees that command buffers of size SVGA_CB_MAX_SIZE
+ * will be supported. If a larger command buffer is submitted results
+ * are unspecified and the device will either complete the command
+ * buffer or return an error.
+ *
+ * The device guarantees that any individual command in a command
+ * buffer can be up to SVGA_CB_MAX_COMMAND_SIZE in size which is
+ * enough to fit a 64x64 color-cursor definition. If the command is
+ * too large the device is allowed to process the command or return an
+ * error.
+ *
+ * The device context is a special SVGACBContext that allows for
+ * synchronous register like accesses with the flexibility of
+ * commands. There is a different command set defined by
+ * SVGADeviceContextCmdId. The commands in each command buffer is not
+ * allowed to straddle physical pages.
+ *
+ * The offset field which is available starting with the
+ * SVGA_CAP_CMD_BUFFERS_2 cap bit can be set by the guest to bias the
+ * start of command processing into the buffer. If an error is
+ * encountered the errorOffset will still be relative to the specific
+ * PA, not biased by the offset. When the command buffer is finished
+ * the guest should not read the offset field as there is no guarantee
+ * what it will set to.
+ */
+
+#define SVGA_CB_MAX_SIZE (512 * 1024) // 512 KB
+#define SVGA_CB_MAX_QUEUED_PER_CONTEXT 32
+#define SVGA_CB_MAX_COMMAND_SIZE (32 * 1024) // 32 KB
+
+#define SVGA_CB_CONTEXT_MASK 0x3f
+typedef enum {
+ SVGA_CB_CONTEXT_DEVICE = 0x3f,
+ SVGA_CB_CONTEXT_0 = 0x0,
+ SVGA_CB_CONTEXT_MAX = 0x1,
+} SVGACBContext;
+
+
+typedef enum {
+ /*
+ * The guest is supposed to write SVGA_CB_STATUS_NONE to the status
+ * field before submitting the command buffer header, the host will
+ * change the value when it is done with the command buffer.
+ */
+ SVGA_CB_STATUS_NONE = 0,
+
+ /*
+ * Written by the host when a command buffer completes successfully.
+ * The device raises an IRQ with SVGA_IRQFLAG_COMMAND_BUFFER unless
+ * the SVGA_CB_FLAG_NO_IRQ flag is set.
+ */
+ SVGA_CB_STATUS_COMPLETED = 1,
+
+ /*
+ * Written by the host synchronously with the command buffer
+ * submission to indicate the command buffer was not submitted. No
+ * IRQ is raised.
+ */
+ SVGA_CB_STATUS_QUEUE_FULL = 2,
+
+ /*
+ * Written by the host when an error was detected parsing a command
+ * in the command buffer, errorOffset is written to contain the
+ * offset to the first byte of the failing command. The device
+ * raises the IRQ with both SVGA_IRQFLAG_ERROR and
+ * SVGA_IRQFLAG_COMMAND_BUFFER. Some of the commands may have been
+ * processed.
+ */
+ SVGA_CB_STATUS_COMMAND_ERROR = 3,
+
+ /*
+ * Written by the host if there is an error parsing the command
+ * buffer header. The device raises the IRQ with both
+ * SVGA_IRQFLAG_ERROR and SVGA_IRQFLAG_COMMAND_BUFFER. The device
+ * did not processes any of the command buffer.
+ */
+ SVGA_CB_STATUS_CB_HEADER_ERROR = 4,
+
+ /*
+ * Written by the host if the guest requested the host to preempt
+ * the command buffer. The device will not raise any IRQs and the
+ * command buffer was not processed.
+ */
+ SVGA_CB_STATUS_PREEMPTED = 5,
+
+ /*
+ * Written by the host synchronously with the command buffer
+ * submission to indicate the the command buffer was not submitted
+ * due to an error. No IRQ is raised.
+ */
+ SVGA_CB_STATUS_SUBMISSION_ERROR = 6,
+} SVGACBStatus;
+
+typedef enum {
+ SVGA_CB_FLAG_NONE = 0,
+ SVGA_CB_FLAG_NO_IRQ = 1 << 0,
+ SVGA_CB_FLAG_DX_CONTEXT = 1 << 1,
+ SVGA_CB_FLAG_MOB = 1 << 2,
+} SVGACBFlags;
+
+typedef
+struct {
+ volatile SVGACBStatus status; /* Modified by device. */
+ volatile uint32 errorOffset; /* Modified by device. */
+ uint64 id;
+ SVGACBFlags flags;
+ uint32 length;
+ union {
+ PA pa;
+ struct {
+ SVGAMobId mobid;
+ uint32 mobOffset;
+ } mob;
+ } ptr;
+ uint32 offset; /* Valid if CMD_BUFFERS_2 cap set, must be zero otherwise,
+ * modified by device.
+ */
+ uint32 dxContext; /* Valid if DX_CONTEXT flag set, must be zero otherwise */
+ uint32 mustBeZero[6];
+}
+__attribute__((__packed__))
+SVGACBHeader;
+
+typedef enum {
+ SVGA_DC_CMD_NOP = 0,
+ SVGA_DC_CMD_START_STOP_CONTEXT = 1,
+ SVGA_DC_CMD_PREEMPT = 2,
+ SVGA_DC_CMD_MAX = 3,
+} SVGADeviceContextCmdId;
+
+
+typedef struct {
+ uint32 enable;
+ SVGACBContext context;
+} SVGADCCmdStartStop;
+
+/*
+ * SVGADCCmdPreempt --
+ *
+ * This command allows the guest to request that all command buffers
+ * on the specified context be preempted that can be. After execution
+ * of this command all command buffers that were preempted will
+ * already have SVGA_CB_STATUS_PREEMPTED written into the status
+ * field. The device might still be processing a command buffer,
+ * assuming execution of it started before the preemption request was
+ * received. Specifying the ignoreIDZero flag to TRUE will cause the
+ * device to not preempt command buffers with the id field in the
+ * command buffer header set to zero.
+ */
+
+typedef struct {
+ SVGACBContext context;
+ uint32 ignoreIDZero;
+} SVGADCCmdPreempt;
+
/*
* SVGAGMRImageFormat --
@@ -444,6 +630,7 @@ struct SVGASignedPoint {
#define SVGA_CAP_DEAD1 0x02000000
#define SVGA_CAP_CMD_BUFFERS_2 0x04000000
#define SVGA_CAP_GBOBJECTS 0x08000000
+#define SVGA_CAP_CMD_BUFFERS_3 0x10000000
/*
* FIFO register indices.
diff --git a/drivers/gpu/drm/vmwgfx/svga_types.h b/drivers/gpu/drm/vmwgfx/svga_types.h
index 55836de..1186898 100644
--- a/drivers/gpu/drm/vmwgfx/svga_types.h
+++ b/drivers/gpu/drm/vmwgfx/svga_types.h
@@ -40,6 +40,9 @@ typedef uint16_t uint16;
typedef uint32_t uint32;
typedef uint8_t uint8;
typedef int32_t int32;
+typedef uint64_t uint64;
typedef bool Bool;
+typedef uint64 PA;
+typedef uint32 SVGAMobId;
#endif
--
2.1.0
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