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From d6e1d168f3190859f2f1c3071a9f3b0f1db751ee Mon Sep 17 00:00:00 2001
From: Rex Zhu <Rex.Zhu@amd.com>
Date: Wed, 24 Oct 2018 16:10:33 +0800
Subject: [PATCH 0926/2940] drm/amdgpu: Limit vm max ctx number to 4096
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
driver need to reserve resource for each ctx for
some hw features. so add this limitation.
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 1 +
drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c | 2 +-
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index c5be95000323..301fcca202a7 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -167,6 +167,7 @@ extern int amdgpu_si_support;
extern int amdgpu_cik_support;
#endif
+#define AMDGPU_VM_MAX_NUM_CTX 4096
#define AMDGPU_SG_THRESHOLD (256*1024*1024)
#define AMDGPU_DEFAULT_GTT_SIZE_MB 3072ULL /* 3GB by default */
#define AMDGPU_WAIT_IDLE_TIMEOUT_IN_MS 3000
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
index 2f802cf38b28..9c704f958d0e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
@@ -250,7 +250,7 @@ static int amdgpu_ctx_alloc(struct amdgpu_device *adev,
return -ENOMEM;
mutex_lock(&mgr->lock);
- r = idr_alloc(&mgr->ctx_handles, ctx, 1, 0, GFP_KERNEL);
+ r = idr_alloc(&mgr->ctx_handles, ctx, 1, AMDGPU_VM_MAX_NUM_CTX, GFP_KERNEL);
if (r < 0) {
mutex_unlock(&mgr->lock);
kfree(ctx);
--
2.17.1
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