[PATCH 5/7] drm/panfrost: Add flag to map GEM object Write-Back Cacheable

[Faith Ekstrand]

Signed-off-by: Faith Ekstrand <faith.ekstr...@collabora.com>
---
 drivers/gpu/drm/panfrost/panfrost_drv.c | 7 +++++--
 drivers/gpu/drm/panfrost/panfrost_gem.c | 3 +++
 include/uapi/drm/panfrost_drm.h         | 1 +
 3 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c 
b/drivers/gpu/drm/panfrost/panfrost_drv.c
index 1ea6c509a5d5..ac2a3939f0c1 100644
--- a/drivers/gpu/drm/panfrost/panfrost_drv.c
+++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
@@ -116,6 +116,10 @@ static int panfrost_ioctl_get_param(struct drm_device 
*ddev, void *data, struct
        return 0;
 }
 
+#define PANFROST_BO_FLAGS      (PANFROST_BO_NOEXEC | \
+                                PANFROST_BO_HEAP | \
+                                PANFROST_BO_WB_MMAP)
+
 static int panfrost_ioctl_create_bo(struct drm_device *dev, void *data,
                struct drm_file *file)
 {
@@ -125,8 +129,7 @@ static int panfrost_ioctl_create_bo(struct drm_device *dev, 
void *data,
        struct panfrost_gem_mapping *mapping;
        int ret;
 
-       if (!args->size || args->pad ||
-           (args->flags & ~(PANFROST_BO_NOEXEC | PANFROST_BO_HEAP)))
+       if (!args->size || args->pad || (args->flags & ~PANFROST_BO_FLAGS))
                return -EINVAL;
 
        /* Heaps should never be executable */
diff --git a/drivers/gpu/drm/panfrost/panfrost_gem.c 
b/drivers/gpu/drm/panfrost/panfrost_gem.c
index bb73f2a68a12..9a707055d946 100644
--- a/drivers/gpu/drm/panfrost/panfrost_gem.c
+++ b/drivers/gpu/drm/panfrost/panfrost_gem.c
@@ -320,6 +320,9 @@ panfrost_gem_create(struct drm_device *dev, size_t size, 
u32 flags)
        bo->noexec = !!(flags & PANFROST_BO_NOEXEC);
        bo->is_heap = !!(flags & PANFROST_BO_HEAP);
 
+       if (flags & PANFROST_BO_WB_MMAP)
+               bo->base.map_wc = true;
+
        return bo;
 }
 
diff --git a/include/uapi/drm/panfrost_drm.h b/include/uapi/drm/panfrost_drm.h
index ed67510395bd..e09b6f25acb2 100644
--- a/include/uapi/drm/panfrost_drm.h
+++ b/include/uapi/drm/panfrost_drm.h
@@ -90,6 +90,7 @@ struct drm_panfrost_wait_bo {
 /* Valid flags to pass to drm_panfrost_create_bo */
 #define PANFROST_BO_NOEXEC     1
 #define PANFROST_BO_HEAP       2
+#define PANFROST_BO_WB_MMAP    4
 
 /**
  * struct drm_panfrost_create_bo - ioctl argument for creating Panfrost BOs.
-- 
2.50.1