1 files changed, 72 insertions, 36 deletions

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index ba8e9d3cf0fe..690409ca8a18 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -522,28 +522,73 @@ static int a6xx_cp_init(struct msm_gpu *gpu)
 	return a6xx_idle(gpu, ring) ? 0 : -EINVAL;
 }
 
-static void a6xx_ucode_check_version(struct a6xx_gpu *a6xx_gpu,
+/*
+ * Check that the microcode version is new enough to include several key
+ * security fixes. Return true if the ucode is safe.
+ */
+static bool a6xx_ucode_check_version(struct a6xx_gpu *a6xx_gpu,
 		struct drm_gem_object *obj)
 {
+	struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
+	struct msm_gpu *gpu = &adreno_gpu->base;
 	u32 *buf = msm_gem_get_vaddr(obj);
+	bool ret = false;
 
 	if (IS_ERR(buf))
-		return;
+		return false;
 
 	/*
-	 * If the lowest nibble is 0xa that is an indication that this microcode
-	 * has been patched. The actual version is in dword [3] but we only care
-	 * about the patchlevel which is the lowest nibble of dword [3]
-	 *
-	 * Otherwise check that the firmware is greater than or equal to 1.90
-	 * which was the first version that had this fix built in
+	 * Targets up to a640 (a618, a630 and a640) need to check for a
+	 * microcode version that is patched to support the whereami opcode or
+	 * one that is new enough to include it by default.
 	 */
-	if (((buf[0] & 0xf) == 0xa) && (buf[2] & 0xf) >= 1)
-		a6xx_gpu->has_whereami = true;
-	else if ((buf[0] & 0xfff) > 0x190)
-		a6xx_gpu->has_whereami = true;
+	if (adreno_is_a618(adreno_gpu) || adreno_is_a630(adreno_gpu) ||
+		adreno_is_a640(adreno_gpu)) {
+		/*
+		 * If the lowest nibble is 0xa that is an indication that this
+		 * microcode has been patched. The actual version is in dword
+		 * [3] but we only care about the patchlevel which is the lowest
+		 * nibble of dword [3]
+		 *
+		 * Otherwise check that the firmware is greater than or equal
+		 * to 1.90 which was the first version that had this fix built
+		 * in
+		 */
+		if ((((buf[0] & 0xf) == 0xa) && (buf[2] & 0xf) >= 1) ||
+			(buf[0] & 0xfff) >= 0x190) {
+			a6xx_gpu->has_whereami = true;
+			ret = true;
+			goto out;
+		}
+
+		DRM_DEV_ERROR(&gpu->pdev->dev,
+			"a630 SQE ucode is too old. Have version %x need at least %x\n",
+			buf[0] & 0xfff, 0x190);
+	}  else {
+		/*
+		 * a650 tier targets don't need whereami but still need to be
+		 * equal to or newer than 1.95 for other security fixes
+		 */
+		if (adreno_is_a650(adreno_gpu)) {
+			if ((buf[0] & 0xfff) >= 0x195) {
+				ret = true;
+				goto out;
+			}
+
+			DRM_DEV_ERROR(&gpu->pdev->dev,
+				"a650 SQE ucode is too old. Have version %x need at least %x\n",
+				buf[0] & 0xfff, 0x195);
+		}
 
+		/*
+		 * When a660 is added those targets should return true here
+		 * since those have all the critical security fixes built in
+		 * from the start
+		 */
+	}
+out:
 	msm_gem_put_vaddr(obj);
+	return ret;
 }
 
 static int a6xx_ucode_init(struct msm_gpu *gpu)
@@ -566,7 +611,13 @@ static int a6xx_ucode_init(struct msm_gpu *gpu)
 		}
 
 		msm_gem_object_set_name(a6xx_gpu->sqe_bo, "sqefw");
-		a6xx_ucode_check_version(a6xx_gpu, a6xx_gpu->sqe_bo);
+		if (!a6xx_ucode_check_version(a6xx_gpu, a6xx_gpu->sqe_bo)) {
+			msm_gem_unpin_iova(a6xx_gpu->sqe_bo, gpu->aspace);
+			drm_gem_object_put(a6xx_gpu->sqe_bo);
+
+			a6xx_gpu->sqe_bo = NULL;
+			return -EPERM;
+		}
 	}
 
 	gpu_write64(gpu, REG_A6XX_CP_SQE_INSTR_BASE_LO,
@@ -1350,35 +1401,20 @@ static int a6xx_set_supported_hw(struct device *dev, struct a6xx_gpu *a6xx_gpu,
 		u32 revn)
 {
 	struct opp_table *opp_table;
-	struct nvmem_cell *cell;
 	u32 supp_hw = UINT_MAX;
-	void *buf;
-
-	cell = nvmem_cell_get(dev, "speed_bin");
-	/*
-	 * -ENOENT means that the platform doesn't support speedbin which is
-	 * fine
-	 */
-	if (PTR_ERR(cell) == -ENOENT)
-		return 0;
-	else if (IS_ERR(cell)) {
-		DRM_DEV_ERROR(dev,
-				"failed to read speed-bin. Some OPPs may not be supported by hardware");
-		goto done;
-	}
+	u16 speedbin;
+	int ret;
 
-	buf = nvmem_cell_read(cell, NULL);
-	if (IS_ERR(buf)) {
-		nvmem_cell_put(cell);
+	ret = nvmem_cell_read_u16(dev, "speed_bin", &speedbin);
+	if (ret) {
 		DRM_DEV_ERROR(dev,
-				"failed to read speed-bin. Some OPPs may not be supported by hardware");
+			      "failed to read speed-bin (%d). Some OPPs may not be supported by hardware",
+			      ret);
 		goto done;
 	}
+	speedbin = le16_to_cpu(speedbin);
 
-	supp_hw = fuse_to_supp_hw(dev, revn, *((u32 *) buf));
-
-	kfree(buf);
-	nvmem_cell_put(cell);
+	supp_hw = fuse_to_supp_hw(dev, revn, speedbin);
 
 done:
 	opp_table = dev_pm_opp_set_supported_hw(dev, &supp_hw, 1);