diff options
| -rw-r--r-- | drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 38 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/adreno/adreno_device.c | 1 |
2 files changed, 38 insertions, 1 deletions
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c index 576559a3a523..7028bb784427 100644 --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c @@ -10,6 +10,8 @@ #include <linux/devfreq.h> +#define GPU_PAS_ID 13 + static inline bool _a6xx_check_idle(struct msm_gpu *gpu) { struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); @@ -343,6 +345,20 @@ static int a6xx_ucode_init(struct msm_gpu *gpu) return 0; } +static int a6xx_zap_shader_init(struct msm_gpu *gpu) +{ + static bool loaded; + int ret; + + if (loaded) + return 0; + + ret = adreno_zap_shader_load(gpu, GPU_PAS_ID); + + loaded = !ret; + return ret; +} + #define A6XX_INT_MASK (A6XX_RBBM_INT_0_MASK_CP_AHB_ERROR | \ A6XX_RBBM_INT_0_MASK_RBBM_ATB_ASYNCFIFO_OVERFLOW | \ A6XX_RBBM_INT_0_MASK_CP_HW_ERROR | \ @@ -491,7 +507,27 @@ static int a6xx_hw_init(struct msm_gpu *gpu) if (ret) goto out; - gpu_write(gpu, REG_A6XX_RBBM_SECVID_TRUST_CNTL, 0x0); + /* + * Try to load a zap shader into the secure world. If successful + * we can use the CP to switch out of secure mode. If not then we + * have no resource but to try to switch ourselves out manually. If we + * guessed wrong then access to the RBBM_SECVID_TRUST_CNTL register will + * be blocked and a permissions violation will soon follow. + */ + ret = a6xx_zap_shader_init(gpu); + if (!ret) { + OUT_PKT7(gpu->rb[0], CP_SET_SECURE_MODE, 1); + OUT_RING(gpu->rb[0], 0x00000000); + + a6xx_flush(gpu, gpu->rb[0]); + if (!a6xx_idle(gpu, gpu->rb[0])) + return -EINVAL; + } else { + /* Print a warning so if we die, we know why */ + dev_warn_once(gpu->dev->dev, + "Zap shader not enabled - using SECVID_TRUST_CNTL instead\n"); + gpu_write(gpu, REG_A6XX_RBBM_SECVID_TRUST_CNTL, 0x0); + } out: /* diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c index 0d87db75b710..b907245d3d96 100644 --- a/drivers/gpu/drm/msm/adreno/adreno_device.c +++ b/drivers/gpu/drm/msm/adreno/adreno_device.c @@ -155,6 +155,7 @@ static const struct adreno_info gpulist[] = { .gmem = SZ_1M, .inactive_period = DRM_MSM_INACTIVE_PERIOD, .init = a6xx_gpu_init, + .zapfw = "a630_zap.mdt", }, }; |