Mesa (master): r600/eg: add crap indirect compute support.

[Dave Airlie]

Module: Mesa
Branch: master
Commit: f9c121c420eb3d4b39aad3635b63cd48fe268783
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=f9c121c420eb3d4b39aad3635b63cd48fe268783

Author: Dave Airlie <airlied at redhat.com>
Date:   Tue Jan 30 12:21:59 2018 +1000

r600/eg: add crap indirect compute support.

I think the cp packets can be made work, but I think it might
need a kernel change, so for now just do the worst thing.

Reviewed-by: Roland Scheidegger <sroland at vmware.com>
Signed-off-by: Dave Airlie <airlied at redhat.com>

---

 src/gallium/drivers/r600/evergreen_compute.c | 26 +++++++++++++++++++-------
 1 file changed, 19 insertions(+), 7 deletions(-)

diff --git a/src/gallium/drivers/r600/evergreen_compute.c b/src/gallium/drivers/r600/evergreen_compute.c
index 7880d0f723..b2c724feb0 100644
--- a/src/gallium/drivers/r600/evergreen_compute.c
+++ b/src/gallium/drivers/r600/evergreen_compute.c
@@ -630,13 +630,25 @@ static void evergreen_emit_dispatch(struct r600_context *rctx,
 	radeon_compute_set_context_reg(cs, R_0288E8_SQ_LDS_ALLOC,
 					lds_size | (num_waves << 14));
 
-	/* Dispatch packet */
-	radeon_emit(cs, PKT3C(PKT3_DISPATCH_DIRECT, 3, 0));
-	radeon_emit(cs, info->grid[0]);
-	radeon_emit(cs, info->grid[1]);
-	radeon_emit(cs, info->grid[2]);
-	/* VGT_DISPATCH_INITIATOR = COMPUTE_SHADER_EN */
-	radeon_emit(cs, 1);
+	if (info->indirect) {
+		struct r600_resource *indirect_resource = (struct r600_resource *)info->indirect;
+		unsigned *data = r600_buffer_map_sync_with_rings(&rctx->b, indirect_resource, PIPE_TRANSFER_READ);
+		if (data) {
+			radeon_emit(cs, PKT3C(PKT3_DISPATCH_DIRECT, 3, 0));
+			radeon_emit(cs, data[0]);
+			radeon_emit(cs, data[1]);
+			radeon_emit(cs, data[2]);
+			radeon_emit(cs, 1);
+		}
+	} else {
+		/* Dispatch packet */
+		radeon_emit(cs, PKT3C(PKT3_DISPATCH_DIRECT, 3, 0));
+		radeon_emit(cs, info->grid[0]);
+		radeon_emit(cs, info->grid[1]);
+		radeon_emit(cs, info->grid[2]);
+		/* VGT_DISPATCH_INITIATOR = COMPUTE_SHADER_EN */
+		radeon_emit(cs, 1);
+	}
 
 	if (rctx->is_debug)
 		eg_trace_emit(rctx);