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Message-Id: <20211109181117.591148-3-robdclark@gmail.com>
Date: Tue, 9 Nov 2021 10:11:02 -0800
From: Rob Clark <robdclark@...il.com>
To: dri-devel@...ts.freedesktop.org
Cc: freedreno@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
Jordan Crouse <jordan@...micpenguin.net>,
Akhil P Oommen <akhilpo@...eaurora.org>,
Rob Clark <robdclark@...omium.org>,
Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Iskren Chernev <iskren.chernev@...il.com>,
Dan Carpenter <dan.carpenter@...cle.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...ainline.org>,
Konrad Dybcio <konrad.dybcio@...ainline.org>,
Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
Marijn Suijten <marijn.suijten@...ainline.org>,
Jonathan Marek <jonathan@...ek.ca>,
Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
Sharat Masetty <smasetty@...eaurora.org>,
Douglas Anderson <dianders@...omium.org>,
Yangtao Li <tiny.windzz@...il.com>,
linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 2/5] drm/msm: Drop priv->lastctx
From: Rob Clark <robdclark@...omium.org>
cur_ctx_seqno already does the same thing, but handles the edge cases
where a refcnt'd context can live after lastclose. So let's not have
two ways to do the same thing.
Signed-off-by: Rob Clark <robdclark@...omium.org>
---
drivers/gpu/drm/msm/adreno/a2xx_gpu.c | 3 +--
drivers/gpu/drm/msm/adreno/a3xx_gpu.c | 3 +--
drivers/gpu/drm/msm/adreno/a4xx_gpu.c | 3 +--
drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 8 +++-----
drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 9 +++------
drivers/gpu/drm/msm/adreno/a6xx_gpu.h | 10 ----------
drivers/gpu/drm/msm/msm_drv.c | 6 ------
drivers/gpu/drm/msm/msm_drv.h | 2 +-
drivers/gpu/drm/msm/msm_gpu.c | 2 +-
drivers/gpu/drm/msm/msm_gpu.h | 11 +++++++++++
10 files changed, 22 insertions(+), 35 deletions(-)
diff --git a/drivers/gpu/drm/msm/adreno/a2xx_gpu.c b/drivers/gpu/drm/msm/adreno/a2xx_gpu.c
index bdc989183c64..22e8295a5e2b 100644
--- a/drivers/gpu/drm/msm/adreno/a2xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a2xx_gpu.c
@@ -12,7 +12,6 @@ static bool a2xx_idle(struct msm_gpu *gpu);
static void a2xx_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit)
{
- struct msm_drm_private *priv = gpu->dev->dev_private;
struct msm_ringbuffer *ring = submit->ring;
unsigned int i;
@@ -23,7 +22,7 @@ static void a2xx_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit)
break;
case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
/* ignore if there has not been a ctx switch: */
- if (priv->lastctx == submit->queue->ctx)
+ if (gpu->cur_ctx_seqno == submit->queue->ctx->seqno)
break;
fallthrough;
case MSM_SUBMIT_CMD_BUF:
diff --git a/drivers/gpu/drm/msm/adreno/a3xx_gpu.c b/drivers/gpu/drm/msm/adreno/a3xx_gpu.c
index 8fb847c174ff..2e481e2692ba 100644
--- a/drivers/gpu/drm/msm/adreno/a3xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a3xx_gpu.c
@@ -30,7 +30,6 @@ static bool a3xx_idle(struct msm_gpu *gpu);
static void a3xx_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit)
{
- struct msm_drm_private *priv = gpu->dev->dev_private;
struct msm_ringbuffer *ring = submit->ring;
unsigned int i;
@@ -41,7 +40,7 @@ static void a3xx_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit)
break;
case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
/* ignore if there has not been a ctx switch: */
- if (priv->lastctx == submit->queue->ctx)
+ if (gpu->cur_ctx_seqno == submit->queue->ctx->seqno)
break;
fallthrough;
case MSM_SUBMIT_CMD_BUF:
diff --git a/drivers/gpu/drm/msm/adreno/a4xx_gpu.c b/drivers/gpu/drm/msm/adreno/a4xx_gpu.c
index a96ee79cc5e0..c5524d6e8705 100644
--- a/drivers/gpu/drm/msm/adreno/a4xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a4xx_gpu.c
@@ -24,7 +24,6 @@ static bool a4xx_idle(struct msm_gpu *gpu);
static void a4xx_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit)
{
- struct msm_drm_private *priv = gpu->dev->dev_private;
struct msm_ringbuffer *ring = submit->ring;
unsigned int i;
@@ -35,7 +34,7 @@ static void a4xx_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit)
break;
case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
/* ignore if there has not been a ctx switch: */
- if (priv->lastctx == submit->queue->ctx)
+ if (gpu->cur_ctx_seqno == submit->queue->ctx->seqno)
break;
fallthrough;
case MSM_SUBMIT_CMD_BUF:
diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
index 5e2750eb3810..6163990a4d09 100644
--- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
@@ -65,7 +65,6 @@ void a5xx_flush(struct msm_gpu *gpu, struct msm_ringbuffer *ring,
static void a5xx_submit_in_rb(struct msm_gpu *gpu, struct msm_gem_submit *submit)
{
- struct msm_drm_private *priv = gpu->dev->dev_private;
struct msm_ringbuffer *ring = submit->ring;
struct msm_gem_object *obj;
uint32_t *ptr, dwords;
@@ -76,7 +75,7 @@ static void a5xx_submit_in_rb(struct msm_gpu *gpu, struct msm_gem_submit *submit
case MSM_SUBMIT_CMD_IB_TARGET_BUF:
break;
case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
- if (priv->lastctx == submit->queue->ctx)
+ if (gpu->cur_ctx_seqno == submit->queue->ctx->seqno)
break;
fallthrough;
case MSM_SUBMIT_CMD_BUF:
@@ -126,12 +125,11 @@ static void a5xx_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit)
{
struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
struct a5xx_gpu *a5xx_gpu = to_a5xx_gpu(adreno_gpu);
- struct msm_drm_private *priv = gpu->dev->dev_private;
struct msm_ringbuffer *ring = submit->ring;
unsigned int i, ibs = 0;
if (IS_ENABLED(CONFIG_DRM_MSM_GPU_SUDO) && submit->in_rb) {
- priv->lastctx = NULL;
+ gpu->cur_ctx_seqno = 0;
a5xx_submit_in_rb(gpu, submit);
return;
}
@@ -166,7 +164,7 @@ static void a5xx_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit)
case MSM_SUBMIT_CMD_IB_TARGET_BUF:
break;
case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
- if (priv->lastctx == submit->queue->ctx)
+ if (gpu->cur_ctx_seqno == submit->queue->ctx->seqno)
break;
fallthrough;
case MSM_SUBMIT_CMD_BUF:
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index 33da25b81615..3d2da81cb2c9 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -106,7 +106,7 @@ static void a6xx_set_pagetable(struct a6xx_gpu *a6xx_gpu,
u32 asid;
u64 memptr = rbmemptr(ring, ttbr0);
- if (ctx->seqno == a6xx_gpu->cur_ctx_seqno)
+ if (ctx->seqno == a6xx_gpu->base.base.cur_ctx_seqno)
return;
if (msm_iommu_pagetable_params(ctx->aspace->mmu, &ttbr, &asid))
@@ -138,14 +138,11 @@ static void a6xx_set_pagetable(struct a6xx_gpu *a6xx_gpu,
OUT_PKT7(ring, CP_EVENT_WRITE, 1);
OUT_RING(ring, 0x31);
-
- a6xx_gpu->cur_ctx_seqno = ctx->seqno;
}
static void a6xx_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit)
{
unsigned int index = submit->seqno % MSM_GPU_SUBMIT_STATS_COUNT;
- struct msm_drm_private *priv = gpu->dev->dev_private;
struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
struct a6xx_gpu *a6xx_gpu = to_a6xx_gpu(adreno_gpu);
struct msm_ringbuffer *ring = submit->ring;
@@ -177,7 +174,7 @@ static void a6xx_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit)
case MSM_SUBMIT_CMD_IB_TARGET_BUF:
break;
case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
- if (priv->lastctx == submit->queue->ctx)
+ if (gpu->cur_ctx_seqno == submit->queue->ctx->seqno)
break;
fallthrough;
case MSM_SUBMIT_CMD_BUF:
@@ -1081,7 +1078,7 @@ static int hw_init(struct msm_gpu *gpu)
/* Always come up on rb 0 */
a6xx_gpu->cur_ring = gpu->rb[0];
- a6xx_gpu->cur_ctx_seqno = 0;
+ gpu->cur_ctx_seqno = 0;
/* Enable the SQE_to start the CP engine */
gpu_write(gpu, REG_A6XX_CP_SQE_CNTL, 1);
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.h b/drivers/gpu/drm/msm/adreno/a6xx_gpu.h
index 8e5527c881b1..86e0a7c3fe6d 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.h
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.h
@@ -20,16 +20,6 @@ struct a6xx_gpu {
struct msm_ringbuffer *cur_ring;
- /**
- * cur_ctx_seqno:
- *
- * The ctx->seqno value of the context with current pgtables
- * installed. Tracked by seqno rather than pointer value to
- * avoid dangling pointers, and cases where a ctx can be freed
- * and a new one created with the same address.
- */
- int cur_ctx_seqno;
-
struct a6xx_gmu gmu;
struct drm_gem_object *shadow_bo;
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 7936e8d498dd..73e827641024 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -752,14 +752,8 @@ static void context_close(struct msm_file_private *ctx)
static void msm_postclose(struct drm_device *dev, struct drm_file *file)
{
- struct msm_drm_private *priv = dev->dev_private;
struct msm_file_private *ctx = file->driver_priv;
- mutex_lock(&dev->struct_mutex);
- if (ctx == priv->lastctx)
- priv->lastctx = NULL;
- mutex_unlock(&dev->struct_mutex);
-
context_close(ctx);
}
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index 69952b239384..2943c21d9aac 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -164,7 +164,7 @@ struct msm_drm_private {
/* when we have more than one 'msm_gpu' these need to be an array: */
struct msm_gpu *gpu;
- struct msm_file_private *lastctx;
+
/* gpu is only set on open(), but we need this info earlier */
bool is_a2xx;
bool has_cached_coherent;
diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c
index 2c46cd968ac4..3dfc58e6498f 100644
--- a/drivers/gpu/drm/msm/msm_gpu.c
+++ b/drivers/gpu/drm/msm/msm_gpu.c
@@ -763,7 +763,7 @@ void msm_gpu_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit)
mutex_unlock(&gpu->active_lock);
gpu->funcs->submit(gpu, submit);
- priv->lastctx = submit->queue->ctx;
+ gpu->cur_ctx_seqno = submit->queue->ctx->seqno;
hangcheck_timer_reset(gpu);
}
diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h
index 59870095ea41..623ee416c568 100644
--- a/drivers/gpu/drm/msm/msm_gpu.h
+++ b/drivers/gpu/drm/msm/msm_gpu.h
@@ -144,6 +144,17 @@ struct msm_gpu {
struct msm_ringbuffer *rb[MSM_GPU_MAX_RINGS];
int nr_rings;
+ /**
+ * cur_ctx_seqno:
+ *
+ * The ctx->seqno value of the last context to submit rendering,
+ * and the one with current pgtables installed (for generations
+ * that support per-context pgtables). Tracked by seqno rather
+ * than pointer value to avoid dangling pointers, and cases where
+ * a ctx can be freed and a new one created with the same address.
+ */
+ int cur_ctx_seqno;
+
/*
* List of GEM active objects on this gpu. Protected by
* msm_drm_private::mm_lock
--
2.31.1
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