radeonsi: fix CMASK and HTILE allocation on Tahiti

Tahiti has 12 tile pipes, but P8 pipe config.

It looks like there is no way to get the pipe config except for reading
GB_TILE_MODE. The TILING_CONFIG ioctl doesn't return more than 8 pipes,
so we can't use that for Hawaii.

This fixes a regression caused by 9b046474c95f15338d4c748df9b62871bba6f36f
on Tahiti.

v2: add an assertion and print an error on failure

Cc: [email protected]
Reviewed-by: Michel Dänzer <[email protected]>

2 files changed, 56 insertions, 3 deletions

diff --git a/src/gallium/drivers/radeon/r600_texture.c b/src/gallium/drivers/radeon/r600_texture.c
index 6c846241cb0..d07c9a0c500 100644
--- a/src/gallium/drivers/radeon/r600_texture.c
+++ b/src/gallium/drivers/radeon/r600_texture.c
@@ -389,7 +389,7 @@ static void si_texture_get_cmask_info(struct r600_common_screen *rscreen,
 				      struct r600_cmask_info *out)
 {
 	unsigned pipe_interleave_bytes = rscreen->tiling_info.group_bytes;
-	unsigned num_pipes = rscreen->info.r600_num_tile_pipes;
+	unsigned num_pipes = rscreen->tiling_info.num_channels;
 	unsigned cl_width, cl_height;
 
 	switch (num_pipes) {
@@ -486,7 +486,7 @@ static unsigned si_texture_htile_alloc_size(struct r600_common_screen *rscreen,
 {
 	unsigned cl_width, cl_height, width, height;
 	unsigned slice_elements, slice_bytes, pipe_interleave_bytes, base_align;
-	unsigned num_pipes = rscreen->info.r600_num_tile_pipes;
+	unsigned num_pipes = rscreen->tiling_info.num_channels;
 
 	/* HTILE is broken with 1D tiling on old kernels and CIK. */
 	if (rtex->surface.level[0].mode == RADEON_SURF_MODE_1D &&
diff --git a/src/gallium/drivers/radeonsi/si_pipe.c b/src/gallium/drivers/radeonsi/si_pipe.c
index 635b37d81c6..85b57f4b3bd 100644
--- a/src/gallium/drivers/radeonsi/si_pipe.c
+++ b/src/gallium/drivers/radeonsi/si_pipe.c
@@ -23,6 +23,7 @@
 
 #include "si_pipe.h"
 #include "si_public.h"
+#include "sid.h"
 
 #include "radeon/radeon_uvd.h"
 #include "util/u_blitter.h"
@@ -397,6 +398,57 @@ static void si_destroy_screen(struct pipe_screen* pscreen)
 	r600_destroy_common_screen(&sscreen->b);
 }
 
+#define SI_TILE_MODE_COLOR_2D_8BPP  14
+
+/* Initialize pipe config. This is especially important for GPUs
+ * with 16 pipes and more where it's initialized incorrectly by
+ * the TILING_CONFIG ioctl. */
+static bool si_initialize_pipe_config(struct si_screen *sscreen)
+{
+	unsigned mode2d;
+
+	/* This is okay, because there can be no 2D tiling without
+	 * the tile mode array, so we won't need the pipe config.
+	 * Return "success".
+	 */
+	if (!sscreen->b.info.si_tile_mode_array_valid)
+		return true;
+
+	/* The same index is used for the 2D mode on CIK too. */
+	mode2d = sscreen->b.info.si_tile_mode_array[SI_TILE_MODE_COLOR_2D_8BPP];
+
+	switch (G_009910_PIPE_CONFIG(mode2d)) {
+	case V_02803C_ADDR_SURF_P2:
+		sscreen->b.tiling_info.num_channels = 2;
+		break;
+	case V_02803C_X_ADDR_SURF_P4_8X16:
+	case V_02803C_X_ADDR_SURF_P4_16X16:
+	case V_02803C_X_ADDR_SURF_P4_16X32:
+	case V_02803C_X_ADDR_SURF_P4_32X32:
+		sscreen->b.tiling_info.num_channels = 4;
+		break;
+	case V_02803C_X_ADDR_SURF_P8_16X16_8X16:
+	case V_02803C_X_ADDR_SURF_P8_16X32_8X16:
+	case V_02803C_X_ADDR_SURF_P8_32X32_8X16:
+	case V_02803C_X_ADDR_SURF_P8_16X32_16X16:
+	case V_02803C_X_ADDR_SURF_P8_32X32_16X16:
+	case V_02803C_X_ADDR_SURF_P8_32X32_16X32:
+	case V_02803C_X_ADDR_SURF_P8_32X64_32X32:
+		sscreen->b.tiling_info.num_channels = 8;
+		break;
+	case V_02803C_X_ADDR_SURF_P16_32X32_8X16:
+	case V_02803C_X_ADDR_SURF_P16_32X32_16X16:
+		sscreen->b.tiling_info.num_channels = 16;
+		break;
+	default:
+		assert(0);
+		fprintf(stderr, "radeonsi: Unknown pipe config %i.\n",
+			G_009910_PIPE_CONFIG(mode2d));
+		return false;
+	}
+	return true;
+}
+
 struct pipe_screen *radeonsi_screen_create(struct radeon_winsys *ws)
 {
 	struct si_screen *sscreen = CALLOC_STRUCT(si_screen);
@@ -412,7 +464,8 @@ struct pipe_screen *radeonsi_screen_create(struct radeon_winsys *ws)
 	sscreen->b.b.is_format_supported = si_is_format_supported;
 	sscreen->b.b.resource_create = r600_resource_create_common;
 
-	if (!r600_common_screen_init(&sscreen->b, ws)) {
+	if (!r600_common_screen_init(&sscreen->b, ws) ||
+	    !si_initialize_pipe_config(sscreen)) {
 		FREE(sscreen);
 		return NULL;
 	}