From: Antonino Maniscalco Date: Thu, 3 Oct 2024 16:12:59 +0000 (+0200) Subject: drm/msm/a6xx: Add a flag to allow preemption to submitqueue_create X-Git-Tag: v6.13-rc1~26^2~16^2~44 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=7788d320ba5ecbfa88d0be8c32ef8f018f2f020f;p=linux-block.git drm/msm/a6xx: Add a flag to allow preemption to submitqueue_create Some userspace changes are necessary so add a flag for userspace to advertise support for preemption when creating the submitqueue. When this flag is not set preemption will not be allowed in the middle of the submitted IBs therefore mantaining compatibility with older userspace. The flag is rejected if preemption is not supported on the target, this allows userspace to know whether preemption is supported. Tested-by: Rob Clark Tested-by: Neil Armstrong # on SM8650-QRD Tested-by: Neil Armstrong # on SM8550-QRD Tested-by: Neil Armstrong # on SM8450-HDK Signed-off-by: Antonino Maniscalco Patchwork: https://patchwork.freedesktop.org/patch/618028/ Signed-off-by: Rob Clark --- diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c index be306ae33c08..a0ef86987c5f 100644 --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c @@ -352,8 +352,10 @@ static void a7xx_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit) OUT_PKT7(ring, CP_SET_MARKER, 1); OUT_RING(ring, 0x101); /* IFPC disable */ - OUT_PKT7(ring, CP_SET_MARKER, 1); - OUT_RING(ring, 0x00d); /* IB1LIST start */ + if (submit->queue->flags & MSM_SUBMITQUEUE_ALLOW_PREEMPT) { + OUT_PKT7(ring, CP_SET_MARKER, 1); + OUT_RING(ring, 0x00d); /* IB1LIST start */ + } /* Submit the commands */ for (i = 0; i < submit->nr_cmds; i++) { @@ -384,8 +386,10 @@ static void a7xx_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit) update_shadow_rptr(gpu, ring); } - OUT_PKT7(ring, CP_SET_MARKER, 1); - OUT_RING(ring, 0x00e); /* IB1LIST end */ + if (submit->queue->flags & MSM_SUBMITQUEUE_ALLOW_PREEMPT) { + OUT_PKT7(ring, CP_SET_MARKER, 1); + OUT_RING(ring, 0x00e); /* IB1LIST end */ + } get_stats_counter(ring, REG_A7XX_RBBM_PERFCTR_CP(0), rbmemptr_stats(ring, index, cpcycles_end)); diff --git a/drivers/gpu/drm/msm/msm_submitqueue.c b/drivers/gpu/drm/msm/msm_submitqueue.c index 0e803125a325..9b3ffca3f3b4 100644 --- a/drivers/gpu/drm/msm/msm_submitqueue.c +++ b/drivers/gpu/drm/msm/msm_submitqueue.c @@ -170,6 +170,9 @@ int msm_submitqueue_create(struct drm_device *drm, struct msm_file_private *ctx, if (!priv->gpu) return -ENODEV; + if (flags & MSM_SUBMITQUEUE_ALLOW_PREEMPT && priv->gpu->nr_rings == 1) + return -EINVAL; + ret = msm_gpu_convert_priority(priv->gpu, prio, &ring_nr, &sched_prio); if (ret) return ret; diff --git a/include/uapi/drm/msm_drm.h b/include/uapi/drm/msm_drm.h index 2377147b6af0..b916aab80dde 100644 --- a/include/uapi/drm/msm_drm.h +++ b/include/uapi/drm/msm_drm.h @@ -347,7 +347,10 @@ struct drm_msm_gem_madvise { * backwards compatibility as a "default" submitqueue */ -#define MSM_SUBMITQUEUE_FLAGS (0) +#define MSM_SUBMITQUEUE_ALLOW_PREEMPT 0x00000001 +#define MSM_SUBMITQUEUE_FLAGS ( \ + MSM_SUBMITQUEUE_ALLOW_PREEMPT | \ + 0) /* * The submitqueue priority should be between 0 and MSM_PARAM_PRIORITIES-1,