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Message-Id: <20200905200454.240929-11-robdclark@gmail.com>
Date: Sat, 5 Sep 2020 13:04:16 -0700
From: Rob Clark <robdclark@...il.com>
To: iommu@...ts.linux-foundation.org, dri-devel@...ts.freedesktop.org,
Will Deacon <will@...nel.org>,
Robin Murphy <robin.murphy@....com>,
Joerg Roedel <joro@...tes.org>
Cc: linux-arm-msm@...r.kernel.org, freedreno@...ts.freedesktop.org,
Bjorn Andersson <bjorn.andersson@...aro.org>,
Sibi Sankar <sibis@...eaurora.org>,
Vivek Gautam <vivek.gautam@...eaurora.org>,
Stephen Boyd <swboyd@...omium.org>,
Akhil P Oommen <akhilpo@...eaurora.org>,
Jordan Crouse <jcrouse@...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>,
Jonathan Marek <jonathan@...ek.ca>,
Eric Anholt <eric@...olt.net>,
Sharat Masetty <smasetty@...eaurora.org>,
linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v17 10/20] drm/msm/a6xx: Add support for per-instance pagetables
From: Jordan Crouse <jcrouse@...eaurora.org>
Add support for using per-instance pagetables if all the dependencies are
available.
Signed-off-by: Jordan Crouse <jcrouse@...eaurora.org>
Signed-off-by: Rob Clark <robdclark@...omium.org>
Reviewed-by: Akhil P Oommen <akhilpo@...eaurora.org>
---
drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 62 +++++++++++++++++++++++++++
drivers/gpu/drm/msm/adreno/a6xx_gpu.h | 1 +
drivers/gpu/drm/msm/msm_ringbuffer.h | 1 +
3 files changed, 64 insertions(+)
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index f6aad038d8b6..92ebc73f51e6 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -81,6 +81,49 @@ static void get_stats_counter(struct msm_ringbuffer *ring, u32 counter,
OUT_RING(ring, upper_32_bits(iova));
}
+static void a6xx_set_pagetable(struct a6xx_gpu *a6xx_gpu,
+ struct msm_ringbuffer *ring, struct msm_file_private *ctx)
+{
+ phys_addr_t ttbr;
+ u32 asid;
+ u64 memptr = rbmemptr(ring, ttbr0);
+
+ if (ctx == a6xx_gpu->cur_ctx)
+ return;
+
+ if (msm_iommu_pagetable_params(ctx->aspace->mmu, &ttbr, &asid))
+ return;
+
+ /* Execute the table update */
+ OUT_PKT7(ring, CP_SMMU_TABLE_UPDATE, 4);
+ OUT_RING(ring, CP_SMMU_TABLE_UPDATE_0_TTBR0_LO(lower_32_bits(ttbr)));
+
+ OUT_RING(ring,
+ CP_SMMU_TABLE_UPDATE_1_TTBR0_HI(upper_32_bits(ttbr)) |
+ CP_SMMU_TABLE_UPDATE_1_ASID(asid));
+ OUT_RING(ring, CP_SMMU_TABLE_UPDATE_2_CONTEXTIDR(0));
+ OUT_RING(ring, CP_SMMU_TABLE_UPDATE_3_CONTEXTBANK(0));
+
+ /*
+ * Write the new TTBR0 to the memstore. This is good for debugging.
+ */
+ OUT_PKT7(ring, CP_MEM_WRITE, 4);
+ OUT_RING(ring, CP_MEM_WRITE_0_ADDR_LO(lower_32_bits(memptr)));
+ OUT_RING(ring, CP_MEM_WRITE_1_ADDR_HI(upper_32_bits(memptr)));
+ OUT_RING(ring, lower_32_bits(ttbr));
+ OUT_RING(ring, (asid << 16) | upper_32_bits(ttbr));
+
+ /*
+ * And finally, trigger a uche flush to be sure there isn't anything
+ * lingering in that part of the GPU
+ */
+
+ OUT_PKT7(ring, CP_EVENT_WRITE, 1);
+ OUT_RING(ring, 0x31);
+
+ a6xx_gpu->cur_ctx = ctx;
+}
+
static void a6xx_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit)
{
unsigned int index = submit->seqno % MSM_GPU_SUBMIT_STATS_COUNT;
@@ -90,6 +133,8 @@ static void a6xx_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit)
struct msm_ringbuffer *ring = submit->ring;
unsigned int i;
+ a6xx_set_pagetable(a6xx_gpu, ring, submit->queue->ctx);
+
get_stats_counter(ring, REG_A6XX_RBBM_PERFCTR_CP_0_LO,
rbmemptr_stats(ring, index, cpcycles_start));
@@ -704,6 +749,8 @@ static int a6xx_hw_init(struct msm_gpu *gpu)
/* Always come up on rb 0 */
a6xx_gpu->cur_ring = gpu->rb[0];
+ a6xx_gpu->cur_ctx = NULL;
+
/* Enable the SQE_to start the CP engine */
gpu_write(gpu, REG_A6XX_CP_SQE_CNTL, 1);
@@ -1016,6 +1063,20 @@ static unsigned long a6xx_gpu_busy(struct msm_gpu *gpu)
return (unsigned long)busy_time;
}
+static struct msm_gem_address_space *
+a6xx_create_private_address_space(struct msm_gpu *gpu)
+{
+ struct msm_mmu *mmu;
+
+ mmu = msm_iommu_pagetable_create(gpu->aspace->mmu);
+
+ if (IS_ERR(mmu))
+ return ERR_CAST(mmu);
+
+ return msm_gem_address_space_create(mmu,
+ "gpu", 0x100000000ULL, 0x1ffffffffULL);
+}
+
static const struct adreno_gpu_funcs funcs = {
.base = {
.get_param = adreno_get_param,
@@ -1039,6 +1100,7 @@ static const struct adreno_gpu_funcs funcs = {
.gpu_state_put = a6xx_gpu_state_put,
#endif
.create_address_space = adreno_iommu_create_address_space,
+ .create_private_address_space = a6xx_create_private_address_space,
},
.get_timestamp = a6xx_get_timestamp,
};
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.h b/drivers/gpu/drm/msm/adreno/a6xx_gpu.h
index 03ba60d5b07f..da22d7549d9b 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.h
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.h
@@ -19,6 +19,7 @@ struct a6xx_gpu {
uint64_t sqe_iova;
struct msm_ringbuffer *cur_ring;
+ struct msm_file_private *cur_ctx;
struct a6xx_gmu gmu;
};
diff --git a/drivers/gpu/drm/msm/msm_ringbuffer.h b/drivers/gpu/drm/msm/msm_ringbuffer.h
index 7764373d0ed2..0987d6bf848c 100644
--- a/drivers/gpu/drm/msm/msm_ringbuffer.h
+++ b/drivers/gpu/drm/msm/msm_ringbuffer.h
@@ -31,6 +31,7 @@ struct msm_rbmemptrs {
volatile uint32_t fence;
volatile struct msm_gpu_submit_stats stats[MSM_GPU_SUBMIT_STATS_COUNT];
+ volatile u64 ttbr0;
};
struct msm_ringbuffer {
--
2.26.2
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