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path: root/drivers/gpu/drm/exynos/exynos_drm_buf.c
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Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_drm_buf.c')
-rw-r--r--drivers/gpu/drm/exynos/exynos_drm_buf.c178
1 files changed, 83 insertions, 95 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_buf.c b/drivers/gpu/drm/exynos/exynos_drm_buf.c
index 118c117b322..57affae9568 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_buf.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_buf.c
@@ -3,24 +3,10 @@
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
* Author: Inki Dae <inki.dae@samsung.com>
*
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
*/
#include <drm/drmP.h>
@@ -29,93 +15,103 @@
#include "exynos_drm_drv.h"
#include "exynos_drm_gem.h"
#include "exynos_drm_buf.h"
+#include "exynos_drm_iommu.h"
static int lowlevel_buffer_allocate(struct drm_device *dev,
unsigned int flags, struct exynos_drm_gem_buf *buf)
{
- dma_addr_t start_addr;
- unsigned int npages, i = 0;
- struct scatterlist *sgl;
int ret = 0;
+ enum dma_attr attr;
+ unsigned int nr_pages;
DRM_DEBUG_KMS("%s\n", __FILE__);
- if (IS_NONCONTIG_BUFFER(flags)) {
- DRM_DEBUG_KMS("not support allocation type.\n");
- return -EINVAL;
- }
-
if (buf->dma_addr) {
DRM_DEBUG_KMS("already allocated.\n");
return 0;
}
- if (buf->size >= SZ_1M) {
- npages = buf->size >> SECTION_SHIFT;
- buf->page_size = SECTION_SIZE;
- } else if (buf->size >= SZ_64K) {
- npages = buf->size >> 16;
- buf->page_size = SZ_64K;
- } else {
- npages = buf->size >> PAGE_SHIFT;
- buf->page_size = PAGE_SIZE;
- }
+ init_dma_attrs(&buf->dma_attrs);
- buf->sgt = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
- if (!buf->sgt) {
- DRM_ERROR("failed to allocate sg table.\n");
- return -ENOMEM;
- }
+ /*
+ * if EXYNOS_BO_CONTIG, fully physically contiguous memory
+ * region will be allocated else physically contiguous
+ * as possible.
+ */
+ if (!(flags & EXYNOS_BO_NONCONTIG))
+ dma_set_attr(DMA_ATTR_FORCE_CONTIGUOUS, &buf->dma_attrs);
- ret = sg_alloc_table(buf->sgt, npages, GFP_KERNEL);
- if (ret < 0) {
- DRM_ERROR("failed to initialize sg table.\n");
- kfree(buf->sgt);
- buf->sgt = NULL;
- return -ENOMEM;
- }
+ /*
+ * if EXYNOS_BO_WC or EXYNOS_BO_NONCACHABLE, writecombine mapping
+ * else cachable mapping.
+ */
+ if (flags & EXYNOS_BO_WC || !(flags & EXYNOS_BO_CACHABLE))
+ attr = DMA_ATTR_WRITE_COMBINE;
+ else
+ attr = DMA_ATTR_NON_CONSISTENT;
- buf->kvaddr = dma_alloc_writecombine(dev->dev, buf->size,
- &buf->dma_addr, GFP_KERNEL);
- if (!buf->kvaddr) {
- DRM_ERROR("failed to allocate buffer.\n");
- ret = -ENOMEM;
- goto err1;
- }
+ dma_set_attr(attr, &buf->dma_attrs);
+ dma_set_attr(DMA_ATTR_NO_KERNEL_MAPPING, &buf->dma_attrs);
- buf->pages = kzalloc(sizeof(struct page) * npages, GFP_KERNEL);
- if (!buf->pages) {
- DRM_ERROR("failed to allocate pages.\n");
- ret = -ENOMEM;
- goto err2;
- }
+ nr_pages = buf->size >> PAGE_SHIFT;
- sgl = buf->sgt->sgl;
- start_addr = buf->dma_addr;
+ if (!is_drm_iommu_supported(dev)) {
+ dma_addr_t start_addr;
+ unsigned int i = 0;
- while (i < npages) {
- buf->pages[i] = phys_to_page(start_addr);
- sg_set_page(sgl, buf->pages[i], buf->page_size, 0);
- sg_dma_address(sgl) = start_addr;
- start_addr += buf->page_size;
- sgl = sg_next(sgl);
- i++;
+ buf->pages = kzalloc(sizeof(struct page) * nr_pages,
+ GFP_KERNEL);
+ if (!buf->pages) {
+ DRM_ERROR("failed to allocate pages.\n");
+ return -ENOMEM;
+ }
+
+ buf->kvaddr = dma_alloc_attrs(dev->dev, buf->size,
+ &buf->dma_addr, GFP_KERNEL,
+ &buf->dma_attrs);
+ if (!buf->kvaddr) {
+ DRM_ERROR("failed to allocate buffer.\n");
+ kfree(buf->pages);
+ return -ENOMEM;
+ }
+
+ start_addr = buf->dma_addr;
+ while (i < nr_pages) {
+ buf->pages[i] = phys_to_page(start_addr);
+ start_addr += PAGE_SIZE;
+ i++;
+ }
+ } else {
+
+ buf->pages = dma_alloc_attrs(dev->dev, buf->size,
+ &buf->dma_addr, GFP_KERNEL,
+ &buf->dma_attrs);
+ if (!buf->pages) {
+ DRM_ERROR("failed to allocate buffer.\n");
+ return -ENOMEM;
+ }
}
- DRM_DEBUG_KMS("vaddr(0x%lx), dma_addr(0x%lx), size(0x%lx)\n",
- (unsigned long)buf->kvaddr,
+ buf->sgt = drm_prime_pages_to_sg(buf->pages, nr_pages);
+ if (!buf->sgt) {
+ DRM_ERROR("failed to get sg table.\n");
+ ret = -ENOMEM;
+ goto err_free_attrs;
+ }
+
+ DRM_DEBUG_KMS("dma_addr(0x%lx), size(0x%lx)\n",
(unsigned long)buf->dma_addr,
buf->size);
return ret;
-err2:
- dma_free_writecombine(dev->dev, buf->size, buf->kvaddr,
- (dma_addr_t)buf->dma_addr);
+
+err_free_attrs:
+ dma_free_attrs(dev->dev, buf->size, buf->pages,
+ (dma_addr_t)buf->dma_addr, &buf->dma_attrs);
buf->dma_addr = (dma_addr_t)NULL;
-err1:
- sg_free_table(buf->sgt);
- kfree(buf->sgt);
- buf->sgt = NULL;
+
+ if (!is_drm_iommu_supported(dev))
+ kfree(buf->pages);
return ret;
}
@@ -125,23 +121,12 @@ static void lowlevel_buffer_deallocate(struct drm_device *dev,
{
DRM_DEBUG_KMS("%s.\n", __FILE__);
- /*
- * release only physically continuous memory and
- * non-continuous memory would be released by exynos
- * gem framework.
- */
- if (IS_NONCONTIG_BUFFER(flags)) {
- DRM_DEBUG_KMS("not support allocation type.\n");
- return;
- }
-
if (!buf->dma_addr) {
DRM_DEBUG_KMS("dma_addr is invalid.\n");
return;
}
- DRM_DEBUG_KMS("vaddr(0x%lx), dma_addr(0x%lx), size(0x%lx)\n",
- (unsigned long)buf->kvaddr,
+ DRM_DEBUG_KMS("dma_addr(0x%lx), size(0x%lx)\n",
(unsigned long)buf->dma_addr,
buf->size);
@@ -150,11 +135,14 @@ static void lowlevel_buffer_deallocate(struct drm_device *dev,
kfree(buf->sgt);
buf->sgt = NULL;
- kfree(buf->pages);
- buf->pages = NULL;
+ if (!is_drm_iommu_supported(dev)) {
+ dma_free_attrs(dev->dev, buf->size, buf->kvaddr,
+ (dma_addr_t)buf->dma_addr, &buf->dma_attrs);
+ kfree(buf->pages);
+ } else
+ dma_free_attrs(dev->dev, buf->size, buf->pages,
+ (dma_addr_t)buf->dma_addr, &buf->dma_attrs);
- dma_free_writecombine(dev->dev, buf->size, buf->kvaddr,
- (dma_addr_t)buf->dma_addr);
buf->dma_addr = (dma_addr_t)NULL;
}
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-11-04 15:24:14 +0000