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

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Date:   Mon, 15 Aug 2022 14:15:14 -0700
From:   Rob Clark <robdclark@...il.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     freedreno@...ts.freedesktop.org, Daniel Vetter <daniel@...ll.ch>,
        Christian König <christian.koenig@....com>,
        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>,
        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_gem.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index 1dee0d18abbb..1db53545ac40 100644
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -1048,6 +1048,17 @@ static const struct vm_operations_struct vm_ops = {
 	.close = drm_gem_vm_close,
 };
 
+static enum dma_buf_map_info msm_gem_map_info(struct drm_gem_object *obj)
+{
+	struct msm_gem_object *msm_obj = to_msm_bo(obj);
+
+	switch (msm_obj->flags & MSM_BO_CACHE_MASK) {
+	case MSM_BO_WC:                return DMA_BUF_COHERENT_WC;
+	case MSM_BO_CACHED_COHERENT:   return DMA_BUF_COHERENT_CACHED;
+	default:                       return DMA_BUF_MAP_INCOHERENT;
+	}
+}
+
 static const struct drm_gem_object_funcs msm_gem_object_funcs = {
 	.free = msm_gem_free_object,
 	.pin = msm_gem_prime_pin,
@@ -1057,6 +1068,7 @@ static const struct drm_gem_object_funcs msm_gem_object_funcs = {
 	.vunmap = msm_gem_prime_vunmap,
 	.mmap = msm_gem_object_mmap,
 	.vm_ops = &vm_ops,
+	.map_info = msm_gem_map_info,
 };
 
 static int msm_gem_new_impl(struct drm_device *dev,
-- 
2.36.1