diff options
| -rw-r--r-- | drivers/gpu/drm/exynos/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/gpu/drm/exynos/Makefile | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_buf.c | 12 | ||||
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_dmabuf.c | 272 | ||||
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_dmabuf.h | 39 | ||||
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_drv.c | 10 | ||||
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_gem.c | 14 | ||||
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_gem.h | 8 |
8 files changed, 353 insertions, 9 deletions
diff --git a/drivers/gpu/drm/exynos/Kconfig b/drivers/gpu/drm/exynos/Kconfig index 3343ac437fe5..135b61801e83 100644 --- a/drivers/gpu/drm/exynos/Kconfig +++ b/drivers/gpu/drm/exynos/Kconfig @@ -10,6 +10,12 @@ config DRM_EXYNOS Choose this option if you have a Samsung SoC EXYNOS chipset. If M is selected the module will be called exynosdrm. +config DRM_EXYNOS_DMABUF + bool "EXYNOS DRM DMABUF" + depends on DRM_EXYNOS + help + Choose this option if you want to use DMABUF feature for DRM. + config DRM_EXYNOS_FIMD bool "Exynos DRM FIMD" depends on DRM_EXYNOS && !FB_S3C diff --git a/drivers/gpu/drm/exynos/Makefile b/drivers/gpu/drm/exynos/Makefile index 9e0bff8badf9..353e1b7c2e3c 100644 --- a/drivers/gpu/drm/exynos/Makefile +++ b/drivers/gpu/drm/exynos/Makefile @@ -8,6 +8,7 @@ exynosdrm-y := exynos_drm_drv.o exynos_drm_encoder.o exynos_drm_connector.o \ exynos_drm_buf.o exynos_drm_gem.o exynos_drm_core.o \ exynos_drm_plane.o +exynosdrm-$(CONFIG_DRM_EXYNOS_DMABUF) += exynos_drm_dmabuf.o exynosdrm-$(CONFIG_DRM_EXYNOS_FIMD) += exynos_drm_fimd.o exynosdrm-$(CONFIG_DRM_EXYNOS_HDMI) += exynos_hdmi.o exynos_mixer.o \ exynos_ddc.o exynos_hdmiphy.o \ diff --git a/drivers/gpu/drm/exynos/exynos_drm_buf.c b/drivers/gpu/drm/exynos/exynos_drm_buf.c index de8d2090bce3..b3cb0a69fbf2 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_buf.c +++ b/drivers/gpu/drm/exynos/exynos_drm_buf.c @@ -35,7 +35,7 @@ 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, page_size, i = 0; + unsigned int npages, i = 0; struct scatterlist *sgl; int ret = 0; @@ -53,13 +53,13 @@ static int lowlevel_buffer_allocate(struct drm_device *dev, if (buf->size >= SZ_1M) { npages = buf->size >> SECTION_SHIFT; - page_size = SECTION_SIZE; + buf->page_size = SECTION_SIZE; } else if (buf->size >= SZ_64K) { npages = buf->size >> 16; - page_size = SZ_64K; + buf->page_size = SZ_64K; } else { npages = buf->size >> PAGE_SHIFT; - page_size = PAGE_SIZE; + buf->page_size = PAGE_SIZE; } buf->sgt = kzalloc(sizeof(struct sg_table), GFP_KERNEL); @@ -96,9 +96,9 @@ static int lowlevel_buffer_allocate(struct drm_device *dev, while (i < npages) { buf->pages[i] = phys_to_page(start_addr); - sg_set_page(sgl, buf->pages[i], page_size, 0); + sg_set_page(sgl, buf->pages[i], buf->page_size, 0); sg_dma_address(sgl) = start_addr; - start_addr += page_size; + start_addr += buf->page_size; sgl = sg_next(sgl); i++; } diff --git a/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c b/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c new file mode 100644 index 000000000000..274909271c36 --- /dev/null +++ b/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c @@ -0,0 +1,272 @@ +/* exynos_drm_dmabuf.c + * + * Copyright (c) 2012 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. + */ + +#include "drmP.h" +#include "drm.h" +#include "exynos_drm_drv.h" +#include "exynos_drm_gem.h" + +#include <linux/dma-buf.h> + +static struct sg_table *exynos_pages_to_sg(struct page **pages, int nr_pages, + unsigned int page_size) +{ + struct sg_table *sgt = NULL; + struct scatterlist *sgl; + int i, ret; + + sgt = kzalloc(sizeof(*sgt), GFP_KERNEL); + if (!sgt) + goto out; + + ret = sg_alloc_table(sgt, nr_pages, GFP_KERNEL); + if (ret) + goto err_free_sgt; + + if (page_size < PAGE_SIZE) + page_size = PAGE_SIZE; + + for_each_sg(sgt->sgl, sgl, nr_pages, i) + sg_set_page(sgl, pages[i], page_size, 0); + + return sgt; + +err_free_sgt: + kfree(sgt); + sgt = NULL; +out: + return NULL; +} + +static struct sg_table * + exynos_gem_map_dma_buf(struct dma_buf_attachment *attach, + enum dma_data_direction dir) +{ + struct exynos_drm_gem_obj *gem_obj = attach->dmabuf->priv; + struct drm_device *dev = gem_obj->base.dev; + struct exynos_drm_gem_buf *buf; + struct sg_table *sgt = NULL; + unsigned int npages; + int nents; + + DRM_DEBUG_PRIME("%s\n", __FILE__); + + mutex_lock(&dev->struct_mutex); + + buf = gem_obj->buffer; + + /* there should always be pages allocated. */ + if (!buf->pages) { + DRM_ERROR("pages is null.\n"); + goto err_unlock; + } + + npages = buf->size / buf->page_size; + + sgt = exynos_pages_to_sg(buf->pages, npages, buf->page_size); + nents = dma_map_sg(attach->dev, sgt->sgl, sgt->nents, dir); + + DRM_DEBUG_PRIME("npages = %d buffer size = 0x%lx page_size = 0x%lx\n", + npages, buf->size, buf->page_size); + +err_unlock: + mutex_unlock(&dev->struct_mutex); + return sgt; +} + +static void exynos_gem_unmap_dma_buf(struct dma_buf_attachment *attach, + struct sg_table *sgt, + enum dma_data_direction dir) +{ + dma_unmap_sg(attach->dev, sgt->sgl, sgt->nents, dir); + sg_free_table(sgt); + kfree(sgt); + sgt = NULL; +} + +static void exynos_dmabuf_release(struct dma_buf *dmabuf) +{ + struct exynos_drm_gem_obj *exynos_gem_obj = dmabuf->priv; + + DRM_DEBUG_PRIME("%s\n", __FILE__); + + /* + * exynos_dmabuf_release() call means that file object's + * f_count is 0 and it calls drm_gem_object_handle_unreference() + * to drop the references that these values had been increased + * at drm_prime_handle_to_fd() + */ + if (exynos_gem_obj->base.export_dma_buf == dmabuf) { + exynos_gem_obj->base.export_dma_buf = NULL; + + /* + * drop this gem object refcount to release allocated buffer + * and resources. + */ + drm_gem_object_unreference_unlocked(&exynos_gem_obj->base); + } +} + +static void *exynos_gem_dmabuf_kmap_atomic(struct dma_buf *dma_buf, + unsigned long page_num) +{ + /* TODO */ + + return NULL; +} + +static void exynos_gem_dmabuf_kunmap_atomic(struct dma_buf *dma_buf, + unsigned long page_num, + void *addr) +{ + /* TODO */ +} + +static void *exynos_gem_dmabuf_kmap(struct dma_buf *dma_buf, + unsigned long page_num) +{ + /* TODO */ + + return NULL; +} + +static void exynos_gem_dmabuf_kunmap(struct dma_buf *dma_buf, + unsigned long page_num, void *addr) +{ + /* TODO */ +} + +static struct dma_buf_ops exynos_dmabuf_ops = { + .map_dma_buf = exynos_gem_map_dma_buf, + .unmap_dma_buf = exynos_gem_unmap_dma_buf, + .kmap = exynos_gem_dmabuf_kmap, + .kmap_atomic = exynos_gem_dmabuf_kmap_atomic, + .kunmap = exynos_gem_dmabuf_kunmap, + .kunmap_atomic = exynos_gem_dmabuf_kunmap_atomic, + .release = exynos_dmabuf_release, +}; + +struct dma_buf *exynos_dmabuf_prime_export(struct drm_device *drm_dev, + struct drm_gem_object *obj, int flags) +{ + struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj); + + return dma_buf_export(exynos_gem_obj, &exynos_dmabuf_ops, + exynos_gem_obj->base.size, 0600); +} + +struct drm_gem_object *exynos_dmabuf_prime_import(struct drm_device *drm_dev, + struct dma_buf *dma_buf) +{ + struct dma_buf_attachment *attach; + struct sg_table *sgt; + struct scatterlist *sgl; + struct exynos_drm_gem_obj *exynos_gem_obj; + struct exynos_drm_gem_buf *buffer; + struct page *page; + int ret, i = 0; + + DRM_DEBUG_PRIME("%s\n", __FILE__); + + /* is this one of own objects? */ + if (dma_buf->ops == &exynos_dmabuf_ops) { + struct drm_gem_object *obj; + + exynos_gem_obj = dma_buf->priv; + obj = &exynos_gem_obj->base; + + /* is it from our device? */ + if (obj->dev == drm_dev) { + drm_gem_object_reference(obj); + return obj; + } + } + + attach = dma_buf_attach(dma_buf, drm_dev->dev); + if (IS_ERR(attach)) + return ERR_PTR(-EINVAL); + + + sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL); + if (IS_ERR(sgt)) { + ret = PTR_ERR(sgt); + goto err_buf_detach; + } + + buffer = kzalloc(sizeof(*buffer), GFP_KERNEL); + if (!buffer) { + DRM_ERROR("failed to allocate exynos_drm_gem_buf.\n"); + ret = -ENOMEM; + goto err_unmap_attach; + } + + buffer->pages = kzalloc(sizeof(*page) * sgt->nents, GFP_KERNEL); + if (!buffer->pages) { + DRM_ERROR("failed to allocate pages.\n"); + ret = -ENOMEM; + goto err_free_buffer; + } + + exynos_gem_obj = exynos_drm_gem_init(drm_dev, dma_buf->size); + if (!exynos_gem_obj) { + ret = -ENOMEM; + goto err_free_pages; + } + + sgl = sgt->sgl; + buffer->dma_addr = sg_dma_address(sgl); + + while (i < sgt->nents) { + buffer->pages[i] = sg_page(sgl); + buffer->size += sg_dma_len(sgl); + sgl = sg_next(sgl); + i++; + } + + exynos_gem_obj->buffer = buffer; + buffer->sgt = sgt; + exynos_gem_obj->base.import_attach = attach; + + DRM_DEBUG_PRIME("dma_addr = 0x%x, size = 0x%lx\n", buffer->dma_addr, + buffer->size); + + return &exynos_gem_obj->base; + +err_free_pages: + kfree(buffer->pages); + buffer->pages = NULL; +err_free_buffer: + kfree(buffer); + buffer = NULL; +err_unmap_attach: + dma_buf_unmap_attachment(attach, sgt, DMA_BIDIRECTIONAL); +err_buf_detach: + dma_buf_detach(dma_buf, attach); + return ERR_PTR(ret); +} + +MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); +MODULE_DESCRIPTION("Samsung SoC DRM DMABUF Module"); +MODULE_LICENSE("GPL"); diff --git a/drivers/gpu/drm/exynos/exynos_drm_dmabuf.h b/drivers/gpu/drm/exynos/exynos_drm_dmabuf.h new file mode 100644 index 000000000000..662a8f98ccdb --- /dev/null +++ b/drivers/gpu/drm/exynos/exynos_drm_dmabuf.h @@ -0,0 +1,39 @@ +/* exynos_drm_dmabuf.h + * + * Copyright (c) 2012 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. + */ + +#ifndef _EXYNOS_DRM_DMABUF_H_ +#define _EXYNOS_DRM_DMABUF_H_ + +#ifdef CONFIG_DRM_EXYNOS_DMABUF +struct dma_buf *exynos_dmabuf_prime_export(struct drm_device *drm_dev, + struct drm_gem_object *obj, int flags); + +struct drm_gem_object *exynos_dmabuf_prime_import(struct drm_device *drm_dev, + struct dma_buf *dma_buf); +#else +#define exynos_dmabuf_prime_export NULL +#define exynos_dmabuf_prime_import NULL +#endif +#endif diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c index a6819b5f8428..f58a487e4425 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_drv.c +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c @@ -39,6 +39,7 @@ #include "exynos_drm_gem.h" #include "exynos_drm_plane.h" #include "exynos_drm_vidi.h" +#include "exynos_drm_dmabuf.h" #define DRIVER_NAME "exynos" #define DRIVER_DESC "Samsung SoC DRM" @@ -149,6 +150,8 @@ static int exynos_drm_open(struct drm_device *dev, struct drm_file *file) { DRM_DEBUG_DRIVER("%s\n", __FILE__); + drm_prime_init_file_private(&file->prime); + return exynos_drm_subdrv_open(dev, file); } @@ -170,6 +173,7 @@ static void exynos_drm_preclose(struct drm_device *dev, e->base.destroy(&e->base); } } + drm_prime_destroy_file_private(&file->prime); spin_unlock_irqrestore(&dev->event_lock, flags); exynos_drm_subdrv_close(dev, file); @@ -225,7 +229,7 @@ static const struct file_operations exynos_drm_driver_fops = { static struct drm_driver exynos_drm_driver = { .driver_features = DRIVER_HAVE_IRQ | DRIVER_BUS_PLATFORM | - DRIVER_MODESET | DRIVER_GEM, + DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME, .load = exynos_drm_load, .unload = exynos_drm_unload, .open = exynos_drm_open, @@ -241,6 +245,10 @@ static struct drm_driver exynos_drm_driver = { .dumb_create = exynos_drm_gem_dumb_create, .dumb_map_offset = exynos_drm_gem_dumb_map_offset, .dumb_destroy = exynos_drm_gem_dumb_destroy, + .prime_handle_to_fd = drm_gem_prime_handle_to_fd, + .prime_fd_to_handle = drm_gem_prime_fd_to_handle, + .gem_prime_export = exynos_dmabuf_prime_export, + .gem_prime_import = exynos_dmabuf_prime_import, .ioctls = exynos_ioctls, .fops = &exynos_drm_driver_fops, .name = DRIVER_NAME, diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c index e8ab3beb4510..31bb85f5d274 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_gem.c +++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c @@ -96,7 +96,7 @@ out: return roundup(size, PAGE_SIZE); } -static struct page **exynos_gem_get_pages(struct drm_gem_object *obj, +struct page **exynos_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask) { struct inode *inode; @@ -196,6 +196,7 @@ static int exynos_drm_gem_get_pages(struct drm_gem_object *obj) } npages = obj->size >> PAGE_SHIFT; + buf->page_size = PAGE_SIZE; buf->sgt = kzalloc(sizeof(struct sg_table), GFP_KERNEL); if (!buf->sgt) { @@ -308,7 +309,7 @@ void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj) exynos_gem_obj = NULL; } -static struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev, +struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev, unsigned long size) { struct exynos_drm_gem_obj *exynos_gem_obj; @@ -612,8 +613,17 @@ int exynos_drm_gem_init_object(struct drm_gem_object *obj) void exynos_drm_gem_free_object(struct drm_gem_object *obj) { + struct exynos_drm_gem_obj *exynos_gem_obj; + struct exynos_drm_gem_buf *buf; + DRM_DEBUG_KMS("%s\n", __FILE__); + exynos_gem_obj = to_exynos_gem_obj(obj); + buf = exynos_gem_obj->buffer; + + if (obj->import_attach) + drm_prime_gem_destroy(obj, buf->sgt); + exynos_drm_gem_destroy(to_exynos_gem_obj(obj)); } diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.h b/drivers/gpu/drm/exynos/exynos_drm_gem.h index 4ed842039505..efc82527b272 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_gem.h +++ b/drivers/gpu/drm/exynos/exynos_drm_gem.h @@ -40,6 +40,7 @@ * device address with IOMMU. * @sgt: sg table to transfer page data. * @pages: contain all pages to allocated memory region. + * @page_size: could be 4K, 64K or 1MB. * @size: size of allocated memory region. */ struct exynos_drm_gem_buf { @@ -47,6 +48,7 @@ struct exynos_drm_gem_buf { dma_addr_t dma_addr; struct sg_table *sgt; struct page **pages; + unsigned long page_size; unsigned long size; }; @@ -74,9 +76,15 @@ struct exynos_drm_gem_obj { unsigned int flags; }; +struct page **exynos_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask); + /* destroy a buffer with gem object */ void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj); +/* create a private gem object and initialize it. */ +struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev, + unsigned long size); + /* create a new buffer with gem object */ struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev, unsigned int flags, |