[Freedreno] [PATCH v1 4/6] drm/msm: Add support to create target specific address spaces

[Jordan Crouse]

Add support to create a GPU target specific address space for
a context. For those targets that support per-instance
pagetables they will return a new address space set up for
the instance if possible otherwise just use the global
device pagetable.

Signed-off-by: Jordan Crouse <jcro...@codeaurora.org>
---

 drivers/gpu/drm/msm/msm_drv.c | 22 +++++++++++++++++++---
 drivers/gpu/drm/msm/msm_gpu.h |  2 ++
 2 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index e4b750b..e485dc1 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -585,6 +585,18 @@ static void load_gpu(struct drm_device *dev)
        mutex_unlock(&init_lock);
 }
 
+static struct msm_gem_address_space *context_address_space(struct msm_gpu *gpu)
+{
+       if (!gpu)
+               return NULL;
+
+       if (gpu->funcs->create_instance_space)
+               return gpu->funcs->create_instance_space(gpu);
+
+       /* If all else fails use the default global space */
+       return gpu->aspace;
+}
+
 static int context_init(struct drm_device *dev, struct drm_file *file)
 {
        struct msm_drm_private *priv = dev->dev_private;
@@ -596,7 +608,7 @@ static int context_init(struct drm_device *dev, struct 
drm_file *file)
 
        msm_submitqueue_init(dev, ctx);
 
-       ctx->aspace = priv->gpu ? priv->gpu->aspace : NULL;
+       ctx->aspace = context_address_space(priv->gpu);
        file->driver_priv = ctx;
 
        return 0;
@@ -612,8 +624,12 @@ static int msm_open(struct drm_device *dev, struct 
drm_file *file)
        return context_init(dev, file);
 }
 
-static void context_close(struct msm_file_private *ctx)
+static void context_close(struct msm_drm_private *priv,
+               struct msm_file_private *ctx)
 {
+       if (priv->gpu && ctx->aspace != priv->gpu->aspace)
+               msm_gem_address_space_put(ctx->aspace);
+
        msm_submitqueue_close(ctx);
        kfree(ctx);
 }
@@ -628,7 +644,7 @@ static void msm_postclose(struct drm_device *dev, struct 
drm_file *file)
                priv->lastctx = NULL;
        mutex_unlock(&dev->struct_mutex);
 
-       context_close(ctx);
+       context_close(priv, ctx);
 }
 
 static irqreturn_t msm_irq(int irq, void *arg)
diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h
index d496b68..76636da 100644
--- a/drivers/gpu/drm/msm/msm_gpu.h
+++ b/drivers/gpu/drm/msm/msm_gpu.h
@@ -64,6 +64,8 @@ struct msm_gpu_funcs {
        void (*gpu_set_freq)(struct msm_gpu *gpu, unsigned long freq);
        struct msm_gem_address_space *(*create_address_space)
                (struct msm_gpu *gpu, struct platform_device *pdev);
+       struct msm_gem_address_space *(*create_instance_space)
+               (struct msm_gpu *gpu);
 };
 
 struct msm_gpu {
-- 
2.7.4
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