winsys/radeon: add an interface for contexts

Same idea as in libdrm_amdgpu.

A command stream can only be created for a specific context and it's always
submitted to that context.

This will mainly be used by amdgpu and it's required by the GPU reset status
query too.
(radeon only has a basic version of the query and thus doesn't need this)

Reviewed-by: Christian König <christian.koenig@amd.com>

9 files changed, 39 insertions, 12 deletions

diff --git a/src/gallium/drivers/r300/r300_context.c b/src/gallium/drivers/r300/r300_context.c
index c35aa3b24aa..8c24ad6d98a 100644
--- a/src/gallium/drivers/r300/r300_context.c
+++ b/src/gallium/drivers/r300/r300_context.c
@@ -94,6 +94,8 @@ static void r300_destroy_context(struct pipe_context* context)
 
     if (r300->cs)
         r300->rws->cs_destroy(r300->cs);
+    if (r300->ctx)
+        r300->rws->ctx_destroy(r300->ctx);
 
     rc_destroy_regalloc_state(&r300->fs_regalloc_state);
 
@@ -382,7 +384,11 @@ struct pipe_context* r300_create_context(struct pipe_screen* screen,
                      sizeof(struct pipe_transfer), 64,
                      UTIL_SLAB_SINGLETHREADED);
 
-    r300->cs = rws->cs_create(rws, RING_GFX, r300_flush_callback, r300, NULL);
+    r300->ctx = rws->ctx_create(rws);
+    if (!r300->ctx)
+        goto fail;
+
+    r300->cs = rws->cs_create(r300->ctx, RING_GFX, r300_flush_callback, r300, NULL);
     if (r300->cs == NULL)
         goto fail;
 
diff --git a/src/gallium/drivers/r300/r300_context.h b/src/gallium/drivers/r300/r300_context.h
index 5a58500b074..18ae11a3a24 100644
--- a/src/gallium/drivers/r300/r300_context.h
+++ b/src/gallium/drivers/r300/r300_context.h
@@ -449,6 +449,8 @@ struct r300_context {
 
     /* The interface to the windowing system, etc. */
     struct radeon_winsys *rws;
+    /* The submission context. */
+    struct radeon_winsys_ctx *ctx;
     /* The command stream. */
     struct radeon_winsys_cs *cs;
     /* Screen. */
diff --git a/src/gallium/drivers/r600/r600_pipe.c b/src/gallium/drivers/r600/r600_pipe.c
index e755784209a..f02014e17f0 100644
--- a/src/gallium/drivers/r600/r600_pipe.c
+++ b/src/gallium/drivers/r600/r600_pipe.c
@@ -176,7 +176,7 @@ static struct pipe_context *r600_create_context(struct pipe_screen *screen, void
 		goto fail;
 	}
 
-	rctx->b.rings.gfx.cs = ws->cs_create(ws, RING_GFX,
+	rctx->b.rings.gfx.cs = ws->cs_create(rctx->b.ctx, RING_GFX,
 					     r600_context_gfx_flush, rctx,
 					     rscreen->b.trace_bo ?
 						     rscreen->b.trace_bo->cs_buf : NULL);
diff --git a/src/gallium/drivers/radeon/r600_pipe_common.c b/src/gallium/drivers/radeon/r600_pipe_common.c
index 4c29f5235e1..3f1c0f0eae9 100644
--- a/src/gallium/drivers/radeon/r600_pipe_common.c
+++ b/src/gallium/drivers/radeon/r600_pipe_common.c
@@ -262,8 +262,12 @@ bool r600_common_context_init(struct r600_common_context *rctx,
 	if (!rctx->uploader)
 		return false;
 
+	rctx->ctx = rctx->ws->ctx_create(rctx->ws);
+	if (!rctx->ctx)
+		return false;
+
 	if (rscreen->info.r600_has_dma && !(rscreen->debug_flags & DBG_NO_ASYNC_DMA)) {
-		rctx->rings.dma.cs = rctx->ws->cs_create(rctx->ws, RING_DMA,
+		rctx->rings.dma.cs = rctx->ws->cs_create(rctx->ctx, RING_DMA,
 							 r600_flush_dma_ring,
 							 rctx, NULL);
 		rctx->rings.dma.flush = r600_flush_dma_ring;
@@ -274,12 +278,12 @@ bool r600_common_context_init(struct r600_common_context *rctx,
 
 void r600_common_context_cleanup(struct r600_common_context *rctx)
 {
-	if (rctx->rings.gfx.cs) {
+	if (rctx->rings.gfx.cs)
 		rctx->ws->cs_destroy(rctx->rings.gfx.cs);
-	}
-	if (rctx->rings.dma.cs) {
+	if (rctx->rings.dma.cs)
 		rctx->ws->cs_destroy(rctx->rings.dma.cs);
-	}
+	if (rctx->ctx)
+		rctx->ws->ctx_destroy(rctx->ctx);
 
 	if (rctx->uploader) {
 		u_upload_destroy(rctx->uploader);
diff --git a/src/gallium/drivers/radeon/r600_pipe_common.h b/src/gallium/drivers/radeon/r600_pipe_common.h
index dbd82880583..ce3f396011f 100644
--- a/src/gallium/drivers/radeon/r600_pipe_common.h
+++ b/src/gallium/drivers/radeon/r600_pipe_common.h
@@ -372,6 +372,7 @@ struct r600_common_context {
 
 	struct r600_common_screen	*screen;
 	struct radeon_winsys		*ws;
+	struct radeon_winsys_ctx	*ctx;
 	enum radeon_family		family;
 	enum chip_class			chip_class;
 	struct r600_rings		rings;
diff --git a/src/gallium/drivers/radeon/radeon_uvd.c b/src/gallium/drivers/radeon/radeon_uvd.c
index be58d0b9ce3..79fc0c726c4 100644
--- a/src/gallium/drivers/radeon/radeon_uvd.c
+++ b/src/gallium/drivers/radeon/radeon_uvd.c
@@ -761,6 +761,7 @@ struct pipe_video_codec *ruvd_create_decoder(struct pipe_context *context,
 {
 	struct radeon_winsys* ws = ((struct r600_common_context *)context)->ws;
 	unsigned dpb_size = calc_dpb_size(templ);
+	struct r600_common_context *rctx = (struct r600_common_context*)context;
 	unsigned width = templ->width, height = templ->height;
 	unsigned bs_buf_size;
 	struct radeon_info info;
@@ -807,7 +808,7 @@ struct pipe_video_codec *ruvd_create_decoder(struct pipe_context *context,
 	dec->stream_handle = rvid_alloc_stream_handle();
 	dec->screen = context->screen;
 	dec->ws = ws;
-	dec->cs = ws->cs_create(ws, RING_UVD, NULL, NULL, NULL);
+	dec->cs = ws->cs_create(rctx->ctx, RING_UVD, NULL, NULL, NULL);
 	if (!dec->cs) {
 		RVID_ERR("Can't get command submission context.\n");
 		goto error;
diff --git a/src/gallium/drivers/radeon/radeon_vce.c b/src/gallium/drivers/radeon/radeon_vce.c
index a6567379fe3..4557ce55556 100644
--- a/src/gallium/drivers/radeon/radeon_vce.c
+++ b/src/gallium/drivers/radeon/radeon_vce.c
@@ -377,6 +377,7 @@ struct pipe_video_codec *rvce_create_encoder(struct pipe_context *context,
 					     rvce_get_buffer get_buffer)
 {
 	struct r600_common_screen *rscreen = (struct r600_common_screen *)context->screen;
+	struct r600_common_context *rctx = (struct r600_common_context*)context;
 	struct rvce_encoder *enc;
 	struct pipe_video_buffer *tmp_buf, templat = {};
 	struct radeon_surf *tmp_surf;
@@ -411,7 +412,7 @@ struct pipe_video_codec *rvce_create_encoder(struct pipe_context *context,
 
 	enc->screen = context->screen;
 	enc->ws = ws;
-	enc->cs = ws->cs_create(ws, RING_VCE, rvce_cs_flush, enc, NULL);
+	enc->cs = ws->cs_create(rctx->ctx, RING_VCE, rvce_cs_flush, enc, NULL);
 	if (!enc->cs) {
 		RVID_ERR("Can't get command submission context.\n");
 		goto error;
diff --git a/src/gallium/drivers/radeon/radeon_winsys.h b/src/gallium/drivers/radeon/radeon_winsys.h
index ea1e1970157..93618ccbc1a 100644
--- a/src/gallium/drivers/radeon/radeon_winsys.h
+++ b/src/gallium/drivers/radeon/radeon_winsys.h
@@ -191,6 +191,7 @@ enum radeon_bo_priority {
 
 struct winsys_handle;
 struct radeon_winsys_cs_handle;
+struct radeon_winsys_ctx;
 
 struct radeon_winsys_cs {
     unsigned                    cdw;  /* Number of used dwords. */
@@ -506,15 +507,26 @@ struct radeon_winsys {
      *************************************************************************/
 
     /**
+     * Create a command submission context.
+     * Various command streams can be submitted to the same context.
+     */
+    struct radeon_winsys_ctx *(*ctx_create)(struct radeon_winsys *ws);
+
+    /**
+     * Destroy a context.
+     */
+    void (*ctx_destroy)(struct radeon_winsys_ctx *ctx);
+
+    /**
      * Create a command stream.
      *
-     * \param ws        The winsys this function is called from.
+     * \param ctx       The submission context
      * \param ring_type The ring type (GFX, DMA, UVD)
      * \param flush     Flush callback function associated with the command stream.
      * \param user      User pointer that will be passed to the flush callback.
      * \param trace_buf Trace buffer when tracing is enabled
      */
-    struct radeon_winsys_cs *(*cs_create)(struct radeon_winsys *ws,
+    struct radeon_winsys_cs *(*cs_create)(struct radeon_winsys_ctx *ctx,
                                           enum ring_type ring_type,
                                           void (*flush)(void *ctx, unsigned flags,
 							struct pipe_fence_handle **fence),
diff --git a/src/gallium/drivers/radeonsi/si_pipe.c b/src/gallium/drivers/radeonsi/si_pipe.c
index 73797976b5b..cacef9f0ae7 100644
--- a/src/gallium/drivers/radeonsi/si_pipe.c
+++ b/src/gallium/drivers/radeonsi/si_pipe.c
@@ -118,7 +118,7 @@ static struct pipe_context *si_create_context(struct pipe_screen *screen, void *
 		sctx->b.b.create_video_buffer = vl_video_buffer_create;
 	}
 
-	sctx->b.rings.gfx.cs = ws->cs_create(ws, RING_GFX, si_context_gfx_flush,
+	sctx->b.rings.gfx.cs = ws->cs_create(sctx->b.ctx, RING_GFX, si_context_gfx_flush,
 					     sctx, sscreen->b.trace_bo ?
 						sscreen->b.trace_bo->cs_buf : NULL);
 	sctx->b.rings.gfx.flush = si_context_gfx_flush;