Mesa (master): freedreno/drm-shim: Add support for faking other adreno chips.

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Module: Mesa
Branch: master
Commit: c1e7c1f4224789f0bc4cc847cecde350e2c6d2f2
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=c1e7c1f4224789f0bc4cc847cecde350e2c6d2f2

Author: Eric Anholt <eric at anholt.net>
Date:   Fri Apr 17 17:18:25 2020 -0700

freedreno/drm-shim: Add support for faking other adreno chips.

I wanted to look at the effect of a core NIR change on a2xx codegen, but I
don't have any of those boards.  This could also prove useful for quickly
sanity-checking the compiler by running shader-db on it -- a2xx fails in a
few ways on glmark2, and a3xx-a5xx fails on glmark2 in a debug_assert
(which we don't have enabled in our dEQP runs).

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4652>

---

 src/freedreno/drm-shim/README.md        |   3 +
 src/freedreno/drm-shim/freedreno_noop.c | 124 +++++++++++++++++++++++++++++++-
 2 files changed, 124 insertions(+), 3 deletions(-)

diff --git a/src/freedreno/drm-shim/README.md b/src/freedreno/drm-shim/README.md
index fd4afa1f896..58df7939819 100644
--- a/src/freedreno/drm-shim/README.md
+++ b/src/freedreno/drm-shim/README.md
@@ -5,3 +5,6 @@ The submit ioctl is stubbed out to not execute anything.
 
 Export `MESA_LOADER_DRIVER_OVERRIDE=msm
 LD_PRELOAD=$prefix/lib/libfreedreno_noop_drm_shim.so`.
+
+By default, a630 is exposed.  The chip can be selected an enviornment
+variable like `FD_GPU_ID=307"
diff --git a/src/freedreno/drm-shim/freedreno_noop.c b/src/freedreno/drm-shim/freedreno_noop.c
index 8f074be7397..48f1c8953f9 100644
--- a/src/freedreno/drm-shim/freedreno_noop.c
+++ b/src/freedreno/drm-shim/freedreno_noop.c
@@ -47,6 +47,14 @@ static struct msm_device msm = {
 	.next_offset = 0x1000,
 };
 
+struct msm_device_info {
+	uint32_t gpu_id;
+	uint32_t chip_id;
+	uint32_t gmem_size;
+};
+
+static const struct msm_device_info *device_info;
+
 static int
 msm_ioctl_noop(int fd, unsigned long request, void *arg)
 {
@@ -108,16 +116,16 @@ msm_ioctl_get_param(int fd, unsigned long request, void *arg)
 
 	switch (gp->param) {
 	case MSM_PARAM_GPU_ID:
-		gp->value = 630;
+		gp->value = device_info->gpu_id;
 		return 0;
 	case MSM_PARAM_GMEM_SIZE:
-		gp->value = 1024 * 1024;
+		gp->value = device_info->gmem_size;
 		return 0;
 	case MSM_PARAM_GMEM_BASE:
 		gp->value = 0x100000;
 		return 0;
 	case MSM_PARAM_CHIP_ID:
-		gp->value = (6 << 24) | (3 << 16) | (0 << 8) | (0xff << 0);
+		gp->value = device_info->chip_id;
 		return 0;
 	case MSM_PARAM_NR_RINGS:
 		gp->value = 1;
@@ -165,6 +173,114 @@ static ioctl_fn_t driver_ioctls[] = {
 	[DRM_MSM_SUBMITQUEUE_QUERY] = msm_ioctl_noop,
 };
 
+#define CHIPID(maj, min, rev, pat) \
+	((maj << 24) | (min << 16) | (rev << 8) | (pat))
+
+static const struct msm_device_info device_infos[] = {
+	{ /* First entry is default */
+		.gpu_id = 630,
+		.chip_id = CHIPID(6, 3, 0, 0xff),
+		.gmem_size = 1024 * 1024,
+	},
+	{
+		.gpu_id = 200,
+		.chip_id = CHIPID(2, 0, 0, 0),
+		.gmem_size = 256 * 1024,
+	},
+	{
+		.gpu_id = 201,
+		.chip_id = CHIPID(2, 0, 0, 1),
+		.gmem_size = 128 * 1024,
+	},
+	{
+		.gpu_id = 220,
+		.chip_id = CHIPID(2, 2, 0, 0xff),
+		.gmem_size = 512 * 1024,
+	},
+	{
+		.gpu_id = 305,
+		.chip_id = CHIPID(3, 0, 5, 0xff),
+		.gmem_size = 256 * 1024,
+	},
+	{
+		.gpu_id = 307,
+		.chip_id = CHIPID(3, 0, 6, 0),
+		.gmem_size = 128 * 1024,
+	},
+	{
+		.gpu_id = 320,
+		.chip_id = CHIPID(3, 2, 0xff, 0xff),
+		.gmem_size = 512 * 1024,
+	},
+	{
+		.gpu_id = 330,
+		.chip_id = CHIPID(3, 3, 0, 0xff),
+		.gmem_size = 1024 * 1024,
+	},
+	{
+		.gpu_id = 420,
+		.chip_id = CHIPID(4, 2, 0, 0xff),
+		.gmem_size = 1536 * 1024,
+	},
+	{
+		.gpu_id = 430,
+		.chip_id = CHIPID(4, 3, 0, 0xff),
+		.gmem_size = 1536 * 1024,
+	},
+	{
+		.gpu_id = 510,
+		.chip_id = CHIPID(5, 1, 0, 0xff),
+		.gmem_size = 256 * 1024,
+	},
+	{
+		.gpu_id = 530,
+		.chip_id = CHIPID(5, 3, 0, 2),
+		.gmem_size = 1024 * 1024,
+	},
+	{
+		.gpu_id = 540,
+		.chip_id = CHIPID(5, 4, 0, 2),
+		.gmem_size = 1024 * 1024,
+	},
+	{
+		.gpu_id = 618,
+		.chip_id = CHIPID(6, 1, 8, 0xff),
+		.gmem_size = 512 * 1024,
+	},
+	{
+		.gpu_id = 630,
+		.chip_id = CHIPID(6, 3, 0, 0xff),
+		.gmem_size = 1024 * 1024,
+	},
+};
+
+
+static void
+msm_driver_get_device_info(void)
+{
+	const char *env = getenv("FD_GPU_ID");
+
+	if (!env) {
+		device_info = &device_infos[0];
+		return;
+	}
+
+	int gpu_id = atoi(env);
+	for (int i = 0; i < ARRAY_SIZE(device_infos); i++) {
+		if (device_infos[i].gpu_id == gpu_id) {
+			device_info = &device_infos[i];
+			return;
+		}
+	}
+
+	fprintf(stderr, "FD_GPU_ID unrecognized, shim supports %d",
+			device_infos[0].gpu_id);
+	for (int i = 1; i < ARRAY_SIZE(device_infos); i++)
+		fprintf(stderr, ", %d", device_infos[i].gpu_id);
+	fprintf(stderr, "\n");
+	abort();
+}
+
 void
 drm_shim_driver_init(void)
 {
@@ -178,6 +294,8 @@ drm_shim_driver_init(void)
 	shim_device.version_minor = 5;
 	shim_device.version_patchlevel = 0;
 
+	msm_driver_get_device_info();
+
 	drm_shim_override_file("OF_FULLNAME=/rdb/msm\n"
 			"OF_COMPATIBLE_N=1\n"
 			"OF_COMPATIBLE_0=qcom,adreno\n",