linux-kernel - [PATCH v2 3/3] drm/msm/prime: Add mmap

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Date:   Mon,  1 Aug 2022 10:04:57 -0700
From:   Rob Clark <robdclark@...il.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     freedreno@...ts.freedesktop.org,
        Rob Clark <robdclark@...omium.org>,
        Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        linux-arm-msm@...r.kernel.org (open list:DRM DRIVER FOR MSM ADRENO GPU),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v2 3/3] drm/msm/prime: Add mmap_info support

From: Rob Clark <robdclark@...omium.org>

Signed-off-by: Rob Clark <robdclark@...omium.org>
---
 drivers/gpu/drm/msm/msm_drv.c       |  1 +
 drivers/gpu/drm/msm/msm_drv.h       |  1 +
 drivers/gpu/drm/msm/msm_gem_prime.c | 11 +++++++++++
 3 files changed, 13 insertions(+)

diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 1ca4a92ba96e..4979aa8187ec 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -1044,6 +1044,7 @@ static const struct drm_driver msm_driver = {
 	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 	.gem_prime_import_sg_table = msm_gem_prime_import_sg_table,
 	.gem_prime_mmap     = msm_gem_prime_mmap,
+	.gem_prime_mmap_info= msm_gem_prime_mmap_info,
 #ifdef CONFIG_DEBUG_FS
 	.debugfs_init       = msm_debugfs_init,
 #endif
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index 7330d7b5de8e..b4ace34ec889 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -271,6 +271,7 @@ void msm_gem_shrinker_init(struct drm_device *dev);
 void msm_gem_shrinker_cleanup(struct drm_device *dev);
 
 int msm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
+int msm_gem_prime_mmap_info(struct drm_gem_object *obj);
 struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj);
 int msm_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map);
 void msm_gem_prime_vunmap(struct drm_gem_object *obj, struct iosys_map *map);
diff --git a/drivers/gpu/drm/msm/msm_gem_prime.c b/drivers/gpu/drm/msm/msm_gem_prime.c
index c1d91863df05..2bacab7a1921 100644
--- a/drivers/gpu/drm/msm/msm_gem_prime.c
+++ b/drivers/gpu/drm/msm/msm_gem_prime.c
@@ -5,6 +5,7 @@
  */
 
 #include <linux/dma-buf.h>
+#include <uapi/linux/dma-buf.h>
 
 #include <drm/drm_prime.h>
 
@@ -26,6 +27,16 @@ int msm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
 	return drm_gem_prime_mmap(obj, vma);
 }
 
+int msm_gem_prime_mmap_info(struct drm_gem_object *obj)
+{
+	struct msm_gem_object *msm_obj = to_msm_bo(obj);
+
+	if (msm_obj->flags & MSM_BO_WC)
+		return DMA_BUF_VM_PROT_WC;
+
+	return DMA_BUF_VM_PROT_CACHED;
+}
+
 struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj)
 {
 	struct msm_gem_object *msm_obj = to_msm_bo(obj);
-- 
2.36.1