[PATCH 5/6] drm/mediatek: Convert to use CMA helpers
Rob Herring
robh at kernel.org
Mon Oct 21 21:45:49 UTC 2019
The only reason the Mediatek driver doesn't use the CMA helpers is it
sets DMA_ATTR_NO_KERNEL_MAPPING and does a vmap() on demand. Using
vmap() is not even guaranteed to work as DMA buffers may not have a
struct page. Now that the CMA helpers support setting
DMA_ATTR_NO_KERNEL_MAPPING as needed or not, convert Mediatek driver to
use CMA helpers.
Cc: CK Hu <ck.hu at mediatek.com>
Cc: Philipp Zabel <p.zabel at pengutronix.de>
Cc: David Airlie <airlied at linux.ie>
Cc: Daniel Vetter <daniel at ffwll.ch>
Cc: Matthias Brugger <matthias.bgg at gmail.com>
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-mediatek at lists.infradead.org
Signed-off-by: Rob Herring <robh at kernel.org>
---
drivers/gpu/drm/mediatek/Makefile | 1 -
drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 2 +-
drivers/gpu/drm/mediatek/mtk_drm_drv.c | 28 +--
drivers/gpu/drm/mediatek/mtk_drm_fb.c | 1 -
drivers/gpu/drm/mediatek/mtk_drm_gem.c | 289 -----------------------
drivers/gpu/drm/mediatek/mtk_drm_gem.h | 51 ----
drivers/gpu/drm/mediatek/mtk_drm_plane.c | 7 +-
7 files changed, 15 insertions(+), 364 deletions(-)
delete mode 100644 drivers/gpu/drm/mediatek/mtk_drm_gem.c
delete mode 100644 drivers/gpu/drm/mediatek/mtk_drm_gem.h
diff --git a/drivers/gpu/drm/mediatek/Makefile b/drivers/gpu/drm/mediatek/Makefile
index 82ae49c64221..50a50e86738f 100644
--- a/drivers/gpu/drm/mediatek/Makefile
+++ b/drivers/gpu/drm/mediatek/Makefile
@@ -8,7 +8,6 @@ mediatek-drm-y := mtk_disp_color.o \
mtk_drm_ddp_comp.o \
mtk_drm_drv.o \
mtk_drm_fb.o \
- mtk_drm_gem.o \
mtk_drm_plane.o \
mtk_dsi.o \
mtk_mipi_tx.o \
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index 34a731755791..638d57e8ac12 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -11,6 +11,7 @@
#include <drm/drm_atomic_helper.h>
#include <drm/drm_plane_helper.h>
+#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>
@@ -18,7 +19,6 @@
#include "mtk_drm_crtc.h"
#include "mtk_drm_ddp.h"
#include "mtk_drm_ddp_comp.h"
-#include "mtk_drm_gem.h"
#include "mtk_drm_plane.h"
/**
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index 352b81a7a670..36f32507e5fb 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -28,7 +28,6 @@
#include "mtk_drm_ddp_comp.h"
#include "mtk_drm_drv.h"
#include "mtk_drm_fb.h"
-#include "mtk_drm_gem.h"
#define DRIVER_NAME "mediatek"
#define DRIVER_DESC "Mediatek SoC DRM"
@@ -335,16 +334,14 @@ static void mtk_drm_kms_deinit(struct drm_device *drm)
drm_mode_config_cleanup(drm);
}
-static const struct file_operations mtk_drm_fops = {
- .owner = THIS_MODULE,
- .open = drm_open,
- .release = drm_release,
- .unlocked_ioctl = drm_ioctl,
- .mmap = mtk_drm_gem_mmap,
- .poll = drm_poll,
- .read = drm_read,
- .compat_ioctl = drm_compat_ioctl,
-};
+DEFINE_DRM_GEM_CMA_FOPS(mtk_drm_fops);
+
+static int mtk_drm_gem_dumb_create(struct drm_file *file_priv,
+ struct drm_device *dev,
+ struct drm_mode_create_dumb *args)
+{
+ return drm_gem_cma_dumb_create_internal(file_priv, dev, args);
+}
/*
* We need to override this because the device used to import the memory is
@@ -361,18 +358,15 @@ struct drm_gem_object *mtk_drm_gem_prime_import(struct drm_device *dev,
static struct drm_driver mtk_drm_driver = {
.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
- .gem_free_object_unlocked = mtk_drm_gem_free_object,
.gem_vm_ops = &drm_gem_cma_vm_ops,
+ .gem_create_object = drm_cma_gem_create_object_default_funcs,
.dumb_create = mtk_drm_gem_dumb_create,
.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
.gem_prime_import = mtk_drm_gem_prime_import,
- .gem_prime_get_sg_table = mtk_gem_prime_get_sg_table,
- .gem_prime_import_sg_table = mtk_gem_prime_import_sg_table,
- .gem_prime_mmap = mtk_drm_gem_mmap_buf,
- .gem_prime_vmap = mtk_drm_gem_prime_vmap,
- .gem_prime_vunmap = mtk_drm_gem_prime_vunmap,
+ .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table_vmap,
+ .gem_prime_mmap = drm_gem_prime_mmap,
.fops = &mtk_drm_fops,
.name = DRIVER_NAME,
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_fb.c b/drivers/gpu/drm/mediatek/mtk_drm_fb.c
index 3f230a28a2dc..596b4d5ed002 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_fb.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_fb.c
@@ -14,7 +14,6 @@
#include "mtk_drm_drv.h"
#include "mtk_drm_fb.h"
-#include "mtk_drm_gem.h"
static const struct drm_framebuffer_funcs mtk_drm_fb_funcs = {
.create_handle = drm_gem_fb_create_handle,
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_gem.c b/drivers/gpu/drm/mediatek/mtk_drm_gem.c
deleted file mode 100644
index ca672f1d140d..000000000000
--- a/drivers/gpu/drm/mediatek/mtk_drm_gem.c
+++ /dev/null
@@ -1,289 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (c) 2015 MediaTek Inc.
- */
-
-#include <linux/dma-buf.h>
-
-#include <drm/drm.h>
-#include <drm/drm_device.h>
-#include <drm/drm_gem.h>
-#include <drm/drm_prime.h>
-
-#include "mtk_drm_drv.h"
-#include "mtk_drm_gem.h"
-
-static struct mtk_drm_gem_obj *mtk_drm_gem_init(struct drm_device *dev,
- unsigned long size)
-{
- struct mtk_drm_gem_obj *mtk_gem_obj;
- int ret;
-
- size = round_up(size, PAGE_SIZE);
-
- mtk_gem_obj = kzalloc(sizeof(*mtk_gem_obj), GFP_KERNEL);
- if (!mtk_gem_obj)
- return ERR_PTR(-ENOMEM);
-
- ret = drm_gem_object_init(dev, &mtk_gem_obj->base, size);
- if (ret < 0) {
- DRM_ERROR("failed to initialize gem object\n");
- kfree(mtk_gem_obj);
- return ERR_PTR(ret);
- }
-
- return mtk_gem_obj;
-}
-
-struct mtk_drm_gem_obj *mtk_drm_gem_create(struct drm_device *dev,
- size_t size, bool alloc_kmap)
-{
- struct mtk_drm_private *priv = dev->dev_private;
- struct mtk_drm_gem_obj *mtk_gem;
- struct drm_gem_object *obj;
- int ret;
-
- mtk_gem = mtk_drm_gem_init(dev, size);
- if (IS_ERR(mtk_gem))
- return ERR_CAST(mtk_gem);
-
- obj = &mtk_gem->base;
-
- mtk_gem->dma_attrs = DMA_ATTR_WRITE_COMBINE;
-
- if (!alloc_kmap)
- mtk_gem->dma_attrs |= DMA_ATTR_NO_KERNEL_MAPPING;
-
- mtk_gem->cookie = dma_alloc_attrs(priv->dma_dev, obj->size,
- &mtk_gem->dma_addr, GFP_KERNEL,
- mtk_gem->dma_attrs);
- if (!mtk_gem->cookie) {
- DRM_ERROR("failed to allocate %zx byte dma buffer", obj->size);
- ret = -ENOMEM;
- goto err_gem_free;
- }
-
- if (alloc_kmap)
- mtk_gem->kvaddr = mtk_gem->cookie;
-
- DRM_DEBUG_DRIVER("cookie = %p dma_addr = %pad size = %zu\n",
- mtk_gem->cookie, &mtk_gem->dma_addr,
- size);
-
- return mtk_gem;
-
-err_gem_free:
- drm_gem_object_release(obj);
- kfree(mtk_gem);
- return ERR_PTR(ret);
-}
-
-void mtk_drm_gem_free_object(struct drm_gem_object *obj)
-{
- struct mtk_drm_gem_obj *mtk_gem = to_mtk_gem_obj(obj);
- struct mtk_drm_private *priv = obj->dev->dev_private;
-
- if (mtk_gem->sg)
- drm_prime_gem_destroy(obj, mtk_gem->sg);
- else
- dma_free_attrs(priv->dma_dev, obj->size, mtk_gem->cookie,
- mtk_gem->dma_addr, mtk_gem->dma_attrs);
-
- /* release file pointer to gem object. */
- drm_gem_object_release(obj);
-
- kfree(mtk_gem);
-}
-
-int mtk_drm_gem_dumb_create(struct drm_file *file_priv, struct drm_device *dev,
- struct drm_mode_create_dumb *args)
-{
- struct mtk_drm_gem_obj *mtk_gem;
- int ret;
-
- args->pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
- args->size = args->pitch * args->height;
-
- mtk_gem = mtk_drm_gem_create(dev, args->size, false);
- if (IS_ERR(mtk_gem))
- return PTR_ERR(mtk_gem);
-
- /*
- * allocate a id of idr table where the obj is registered
- * and handle has the id what user can see.
- */
- ret = drm_gem_handle_create(file_priv, &mtk_gem->base, &args->handle);
- if (ret)
- goto err_handle_create;
-
- /* drop reference from allocate - handle holds it now. */
- drm_gem_object_put_unlocked(&mtk_gem->base);
-
- return 0;
-
-err_handle_create:
- mtk_drm_gem_free_object(&mtk_gem->base);
- return ret;
-}
-
-static int mtk_drm_gem_object_mmap(struct drm_gem_object *obj,
- struct vm_area_struct *vma)
-
-{
- int ret;
- struct mtk_drm_gem_obj *mtk_gem = to_mtk_gem_obj(obj);
- struct mtk_drm_private *priv = obj->dev->dev_private;
-
- /*
- * dma_alloc_attrs() allocated a struct page table for mtk_gem, so clear
- * VM_PFNMAP flag that was set by drm_gem_mmap_obj()/drm_gem_mmap().
- */
- vma->vm_flags &= ~VM_PFNMAP;
-
- ret = dma_mmap_attrs(priv->dma_dev, vma, mtk_gem->cookie,
- mtk_gem->dma_addr, obj->size, mtk_gem->dma_attrs);
- if (ret)
- drm_gem_vm_close(vma);
-
- return ret;
-}
-
-int mtk_drm_gem_mmap_buf(struct drm_gem_object *obj, struct vm_area_struct *vma)
-{
- int ret;
-
- ret = drm_gem_mmap_obj(obj, obj->size, vma);
- if (ret)
- return ret;
-
- return mtk_drm_gem_object_mmap(obj, vma);
-}
-
-int mtk_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
-{
- struct drm_gem_object *obj;
- int ret;
-
- ret = drm_gem_mmap(filp, vma);
- if (ret)
- return ret;
-
- obj = vma->vm_private_data;
-
- /*
- * Set vm_pgoff (used as a fake buffer offset by DRM) to 0 and map the
- * whole buffer from the start.
- */
- vma->vm_pgoff = 0;
-
- return mtk_drm_gem_object_mmap(obj, vma);
-}
-
-/*
- * Allocate a sg_table for this GEM object.
- * Note: Both the table's contents, and the sg_table itself must be freed by
- * the caller.
- * Returns a pointer to the newly allocated sg_table, or an ERR_PTR() error.
- */
-struct sg_table *mtk_gem_prime_get_sg_table(struct drm_gem_object *obj)
-{
- struct mtk_drm_gem_obj *mtk_gem = to_mtk_gem_obj(obj);
- struct mtk_drm_private *priv = obj->dev->dev_private;
- struct sg_table *sgt;
- int ret;
-
- sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
- if (!sgt)
- return ERR_PTR(-ENOMEM);
-
- ret = dma_get_sgtable_attrs(priv->dma_dev, sgt, mtk_gem->cookie,
- mtk_gem->dma_addr, obj->size,
- mtk_gem->dma_attrs);
- if (ret) {
- DRM_ERROR("failed to allocate sgt, %d\n", ret);
- kfree(sgt);
- return ERR_PTR(ret);
- }
-
- return sgt;
-}
-
-struct drm_gem_object *mtk_gem_prime_import_sg_table(struct drm_device *dev,
- struct dma_buf_attachment *attach, struct sg_table *sg)
-{
- struct mtk_drm_gem_obj *mtk_gem;
- int ret;
- struct scatterlist *s;
- unsigned int i;
- dma_addr_t expected;
-
- mtk_gem = mtk_drm_gem_init(dev, attach->dmabuf->size);
-
- if (IS_ERR(mtk_gem))
- return ERR_CAST(mtk_gem);
-
- expected = sg_dma_address(sg->sgl);
- for_each_sg(sg->sgl, s, sg->nents, i) {
- if (sg_dma_address(s) != expected) {
- DRM_ERROR("sg_table is not contiguous");
- ret = -EINVAL;
- goto err_gem_free;
- }
- expected = sg_dma_address(s) + sg_dma_len(s);
- }
-
- mtk_gem->dma_addr = sg_dma_address(sg->sgl);
- mtk_gem->sg = sg;
-
- return &mtk_gem->base;
-
-err_gem_free:
- kfree(mtk_gem);
- return ERR_PTR(ret);
-}
-
-void *mtk_drm_gem_prime_vmap(struct drm_gem_object *obj)
-{
- struct mtk_drm_gem_obj *mtk_gem = to_mtk_gem_obj(obj);
- struct sg_table *sgt;
- struct sg_page_iter iter;
- unsigned int npages;
- unsigned int i = 0;
-
- if (mtk_gem->kvaddr)
- return mtk_gem->kvaddr;
-
- sgt = mtk_gem_prime_get_sg_table(obj);
- if (IS_ERR(sgt))
- return NULL;
-
- npages = obj->size >> PAGE_SHIFT;
- mtk_gem->pages = kcalloc(npages, sizeof(*mtk_gem->pages), GFP_KERNEL);
- if (!mtk_gem->pages)
- goto out;
-
- for_each_sg_page(sgt->sgl, &iter, sgt->orig_nents, 0) {
- mtk_gem->pages[i++] = sg_page_iter_page(&iter);
- if (i > npages)
- break;
- }
- mtk_gem->kvaddr = vmap(mtk_gem->pages, npages, VM_MAP,
- pgprot_writecombine(PAGE_KERNEL));
-
-out:
- kfree((void *)sgt);
-
- return mtk_gem->kvaddr;
-}
-
-void mtk_drm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
-{
- struct mtk_drm_gem_obj *mtk_gem = to_mtk_gem_obj(obj);
-
- if (!mtk_gem->pages)
- return;
-
- vunmap(vaddr);
- mtk_gem->kvaddr = 0;
- kfree((void *)mtk_gem->pages);
-}
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_gem.h b/drivers/gpu/drm/mediatek/mtk_drm_gem.h
deleted file mode 100644
index ff9f976d9807..000000000000
--- a/drivers/gpu/drm/mediatek/mtk_drm_gem.h
+++ /dev/null
@@ -1,51 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copyright (c) 2015 MediaTek Inc.
- */
-
-#ifndef _MTK_DRM_GEM_H_
-#define _MTK_DRM_GEM_H_
-
-#include <drm/drm_gem.h>
-
-/*
- * mtk drm buffer structure.
- *
- * @base: a gem object.
- * - a new handle to this gem object would be created
- * by drm_gem_handle_create().
- * @cookie: the return value of dma_alloc_attrs(), keep it for dma_free_attrs()
- * @kvaddr: kernel virtual address of gem buffer.
- * @dma_addr: dma address of gem buffer.
- * @dma_attrs: dma attributes of gem buffer.
- *
- * P.S. this object would be transferred to user as kms_bo.handle so
- * user can access the buffer through kms_bo.handle.
- */
-struct mtk_drm_gem_obj {
- struct drm_gem_object base;
- void *cookie;
- void *kvaddr;
- dma_addr_t dma_addr;
- unsigned long dma_attrs;
- struct sg_table *sg;
- struct page **pages;
-};
-
-#define to_mtk_gem_obj(x) container_of(x, struct mtk_drm_gem_obj, base)
-
-void mtk_drm_gem_free_object(struct drm_gem_object *gem);
-struct mtk_drm_gem_obj *mtk_drm_gem_create(struct drm_device *dev, size_t size,
- bool alloc_kmap);
-int mtk_drm_gem_dumb_create(struct drm_file *file_priv, struct drm_device *dev,
- struct drm_mode_create_dumb *args);
-int mtk_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
-int mtk_drm_gem_mmap_buf(struct drm_gem_object *obj,
- struct vm_area_struct *vma);
-struct sg_table *mtk_gem_prime_get_sg_table(struct drm_gem_object *obj);
-struct drm_gem_object *mtk_gem_prime_import_sg_table(struct drm_device *dev,
- struct dma_buf_attachment *attach, struct sg_table *sg);
-void *mtk_drm_gem_prime_vmap(struct drm_gem_object *obj);
-void mtk_drm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
-
-#endif
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_plane.c b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
index 584a9ecadce6..8f256602f075 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_plane.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
@@ -8,13 +8,14 @@
#include <drm/drm_atomic_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_plane_helper.h>
+#include <drm/drm_print.h>
+#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include "mtk_drm_crtc.h"
#include "mtk_drm_ddp_comp.h"
#include "mtk_drm_drv.h"
#include "mtk_drm_fb.h"
-#include "mtk_drm_gem.h"
#include "mtk_drm_plane.h"
static const u32 formats[] = {
@@ -108,7 +109,6 @@ static void mtk_plane_atomic_update(struct drm_plane *plane,
struct drm_crtc *crtc = plane->state->crtc;
struct drm_framebuffer *fb = plane->state->fb;
struct drm_gem_object *gem;
- struct mtk_drm_gem_obj *mtk_gem;
unsigned int pitch, format;
dma_addr_t addr;
@@ -116,8 +116,7 @@ static void mtk_plane_atomic_update(struct drm_plane *plane,
return;
gem = fb->obj[0];
- mtk_gem = to_mtk_gem_obj(gem);
- addr = mtk_gem->dma_addr;
+ addr = to_drm_gem_cma_obj(gem)->paddr;
pitch = fb->pitches[0];
format = fb->format->format;
--
2.20.1
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