Linaro-mm-sig

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[PATCH] gpu: ion: Use heap->id as the identifier instead of heap->type

by Nishanth Peethambaran

The heap mask used during client create was a bitmask of heap types and the heap mask used during buffer allocation was a bitmask of heap ids. Now, both of them assume a bitmask of heap ids. The debugfs show functions for client and heap were showing info for the heap type instead of showing info of the individual heap. Change-Id: I9c2c142a63865f3d4250cd681dc5cde9638ca09f Signed-off-by: Nishanth Peethambaran <nishanth(a)broadcom.com> --- drivers/gpu/ion/ion.c | 26 +++++++++++++------------- include/linux/ion.h | 8 ++++---- 2 files changed, 17 insertions(+), 17 deletions(-) diff --git a/drivers/gpu/ion/ion.c b/drivers/gpu/ion/ion.c index 6aa817a..b808972 100644 --- a/drivers/gpu/ion/ion.c +++ b/drivers/gpu/ion/ion.c @@ -62,7 +62,7 @@ struct ion_device { * @dev: backpointer to ion device * @handles: an rb tree of all the handles in this client * @lock: lock protecting the tree of handles - * @heap_mask: mask of all supported heaps + * @heap_mask: mask of all supported heap ids * @name: used for debugging * @task: used for debugging * @@ -398,7 +398,7 @@ struct ion_handle *ion_alloc(struct ion_client *client, size_t len, align, heap_mask, flags); /* * traverse the list of heaps available in this system in priority - * order. If the heap type is supported by the client, and matches the + * order. If the heap id is supported by the client, and matches the * request of the caller allocate from it. Repeat until allocate has * succeeded or all heaps have been tried */ @@ -410,10 +410,10 @@ struct ion_handle *ion_alloc(struct ion_client *client, size_t len, down_read(&dev->lock); for (n = rb_first(&dev->heaps); n != NULL; n = rb_next(n)) { struct ion_heap *heap = rb_entry(n, struct ion_heap, node); - /* if the client doesn't support this heap type */ - if (!((1 << heap->type) & client->heap_mask)) + /* if the client doesn't support this heap id */ + if (!((1 << heap->id) & client->heap_mask)) continue; - /* if the caller didn't specify this heap type */ + /* if the caller didn't specify this heap id */ if (!((1 << heap->id) & heap_mask)) continue; buffer = ion_buffer_create(heap, dev, len, align, flags); @@ -597,11 +597,11 @@ static int ion_debug_client_show(struct seq_file *s, void *unused) for (n = rb_first(&client->handles); n; n = rb_next(n)) { struct ion_handle *handle = rb_entry(n, struct ion_handle, node); - enum ion_heap_type type = handle->buffer->heap->type; + int id = handle->buffer->heap->id; - if (!names[type]) - names[type] = handle->buffer->heap->name; - sizes[type] += handle->buffer->size; + if (!names[id]) + names[id] = handle->buffer->heap->name; + sizes[id] += handle->buffer->size; } mutex_unlock(&client->lock); @@ -1176,7 +1176,7 @@ static const struct file_operations ion_fops = { }; static size_t ion_debug_heap_total(struct ion_client *client, - enum ion_heap_type type) + int id) { size_t size = 0; struct rb_node *n; @@ -1186,7 +1186,7 @@ static size_t ion_debug_heap_total(struct ion_client *client, struct ion_handle *handle = rb_entry(n, struct ion_handle, node); - if (handle->buffer->heap->type == type) + if (handle->buffer->heap->id == id) size += handle->buffer->size; } mutex_unlock(&client->lock); @@ -1207,7 +1207,7 @@ static int ion_debug_heap_show(struct seq_file *s, void *unused) for (n = rb_first(&dev->clients); n; n = rb_next(n)) { struct ion_client *client = rb_entry(n, struct ion_client, node); - size_t size = ion_debug_heap_total(client, heap->type); + size_t size = ion_debug_heap_total(client, heap->id); if (!size) continue; if (client->task) { @@ -1228,7 +1228,7 @@ static int ion_debug_heap_show(struct seq_file *s, void *unused) for (n = rb_first(&dev->buffers); n; n = rb_next(n)) { struct ion_buffer *buffer = rb_entry(n, struct ion_buffer, node); - if (buffer->heap->type != heap->type) + if (buffer->heap->id != heap->id) continue; total_size += buffer->size; if (!buffer->handle_count) { diff --git a/include/linux/ion.h b/include/linux/ion.h index a7d399c..f0399ae 100644 --- a/include/linux/ion.h +++ b/include/linux/ion.h @@ -72,7 +72,7 @@ struct ion_buffer; /** * struct ion_platform_heap - defines a heap in the given platform * @type: type of the heap from ion_heap_type enum - * @id: unique identifier for heap. When allocating (lower numbers + * @id: unique identifier for heap. When allocating (lower numbers * will be allocated from first) * @name: used for debug purposes * @base: base address of heap in physical memory if applicable @@ -114,7 +114,7 @@ void ion_reserve(struct ion_platform_data *data); /** * ion_client_create() - allocate a client and returns it * @dev: the global ion device - * @heap_mask: mask of heaps this client can allocate from + * @heap_mask: mask of heap ids this client can allocate from * @name: used for debugging */ struct ion_client *ion_client_create(struct ion_device *dev, @@ -135,7 +135,7 @@ void ion_client_destroy(struct ion_client *client); * @len: size of the allocation * @align: requested allocation alignment, lots of hardware blocks have * alignment requirements of some kind - * @heap_mask: mask of heaps to allocate from, if multiple bits are set + * @heap_mask: mask of heap ids to allocate from, if multiple bits are set * heaps will be tried in order from lowest to highest order bit * @flags: heap flags, the low 16 bits are consumed by ion, the high 16 * bits are passed on to the respective heap and can be heap @@ -236,7 +236,7 @@ struct ion_handle *ion_import_dma_buf(struct ion_client *client, int fd); * struct ion_allocation_data - metadata passed from userspace for allocations * @len: size of the allocation * @align: required alignment of the allocation - * @heap_mask: mask of heaps to allocate from + * @heap_mask: mask of heap ids to allocate from * @flags: flags passed to heap * @handle: pointer that will be populated with a cookie to use to refer * to this allocation -- 1.7.0.4

12 years, 6 months

[PATCH] dma_buf: Cleanup dma_buf_fd

by Borislav Petkov

Remove redundant 'error' variable. Signed-off-by: Borislav Petkov <bp(a)alien8.de> --- drivers/base/dma-buf.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/base/dma-buf.c b/drivers/base/dma-buf.c index 460e22dee36d..a384b63be757 100644 --- a/drivers/base/dma-buf.c +++ b/drivers/base/dma-buf.c @@ -134,15 +134,14 @@ EXPORT_SYMBOL_GPL(dma_buf_export); */ int dma_buf_fd(struct dma_buf *dmabuf, int flags) { - int error, fd; + int fd; if (!dmabuf || !dmabuf->file) return -EINVAL; - error = get_unused_fd_flags(flags); - if (error < 0) - return error; - fd = error; + fd = get_unused_fd_flags(flags); + if (fd < 0) + return fd; fd_install(fd, dmabuf->file); -- 1.8.0

12 years, 6 months

[GIT PULL] CMA and DMA-mapping updates for v3.8

by Marek Szyprowski

Hi Linus, I would like to ask for pulling another set of Contiguous Memory Allocator and DMA-mapping framework updates for v3.8. The following changes since commit 29594404d7fe73cd80eaa4ee8c43dcc53970c60e: Linux 3.7 (2012-12-10 19:30:57 -0800) are available in the git repository at: git://git.linaro.org/people/mszyprowski/linux-dma-mapping.git for-v3.8 for you to fetch changes up to 4009793e15d44469da1547a46ab129cc08ffa503: drivers: cma: represent physical addresses as phys_addr_t (2012-12-11 09:28:09 +0100) ---------------------------------------------------------------- This pull request consists only of two patches. First fixes long standing issue with dmapools (the code predates current GIT history), which forced all allocations to use GFP_ATOMIC flag, ignoring the flags passed by the caller. The second patch changes CMA code to correctly use phys_addr_t type what enables support for LPAE systems. Thanks! Best regards Marek Szyprowski Samsung Poland R&D Center Patch summary: Marek Szyprowski (1): mm: dmapool: use provided gfp flags for all dma_alloc_coherent() calls Vitaly Andrianov (1): drivers: cma: represent physical addresses as phys_addr_t drivers/base/dma-contiguous.c | 24 ++++++++++-------------- include/linux/dma-contiguous.h | 4 ++-- mm/dmapool.c | 31 +++++++------------------------ 3 files changed, 19 insertions(+), 40 deletions(-)

12 years, 6 months

[PATCH] gpu: ion: Export ion_client_create

by Johan Mossberg

Will enable modules to allocate memory with ion. Signed-off-by: Johan Mossberg <johan.mossberg(a)stericsson.com> --- drivers/gpu/ion/ion.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/ion/ion.c b/drivers/gpu/ion/ion.c index 100e5fe..fc152b9 100644 --- a/drivers/gpu/ion/ion.c +++ b/drivers/gpu/ion/ion.c @@ -688,6 +688,7 @@ struct ion_client *ion_client_create(struct ion_device *dev, return client; } +EXPORT_SYMBOL(ion_client_create); void ion_client_destroy(struct ion_client *client) { -- 1.8.0

12 years, 6 months

[PATCH v8 0/3] Add CMA heap for ION memory manager

by Benjamin Gaignard

The goal of those patches is to allow ION clients (drivers or userland applications) to use Contiguous Memory Allocator (CMA). To get more info about CMA: http://lists.linaro.org/pipermail/linaro-mm-sig/2012-February/001328.html patches version 8: - fix memory leak when release sg_table - remove virt_to_phys from ion_cma_phys patches version 7: - rebased on Android kernel - fix ion Makefile - add ion_cma_map_kernel function - remove CONFIG_CMA compilation flags from ion_heap.c patches version 6: - add private field in ion_platform_heap to pass the device linked with CMA. - rework CMA heap to use private field. - prepare CMA heap for incoming dma_common_get_sgtable function http://lists.linaro.org/pipermail/linaro-mm-sig/2012-June/002109.html - simplify ion-ux500 driver. patches version 5: - port patches on android kernel 3.4 where ION use dmabuf - add ion_cma_heap_map_dma and ion_cma_heap_unmap_dma functions patches version 4: - add ION_HEAP_TYPE_DMA heap type in ion_heap_type enum. - CMA heap is now a "native" ION heap. - add ion_heap_create_full function to keep backward compatibilty. - clean up included files in CMA heap - ux500-ion is using ion_heap_create_full instead of ion_heap_create patches version 3: - add a private field in ion_heap structure instead of expose ion_device structure to all heaps - ion_cma_heap is no more a platform driver - ion_cma_heap use ion_heap private field to store the device pointer and make the link with reserved CMA regions - provide ux500-ion driver and configuration file for snowball board to give an example of how use CMA heaps patches version 2: - fix comments done by Andy Green Benjamin Gaignard (3): gpu: ion: fix ion_platform_data definition gpu: ion: add private field in ion_heap and ion_platform_heap structure gpu: ion: add CMA heap drivers/gpu/ion/Kconfig | 5 ++ drivers/gpu/ion/Makefile | 1 + drivers/gpu/ion/ion_cma_heap.c | 192 ++++++++++++++++++++++++++++++++++++++++ drivers/gpu/ion/ion_heap.c | 7 ++ drivers/gpu/ion/ion_priv.h | 16 ++++ include/linux/ion.h | 7 +- 6 files changed, 227 insertions(+), 1 deletion(-) create mode 100644 drivers/gpu/ion/ion_cma_heap.c -- 1.7.10

12 years, 6 months

[PATCH v7 3/3] gpu: ion: add CMA heap

by benjamin.gaignard＠linaro.org

From: Benjamin Gaignard <benjamin.gaignard(a)linaro.org> New heap type ION_HEAP_TYPE_DMA where allocation is done with dma_alloc_coherent API. device coherent_dma_mask must be set to DMA_BIT_MASK(32). ion_platform_heap private field is used to retrieve the device linked to CMA, if NULL the default CMA area is used. ion_cma_get_sgtable is a copy of dma_common_get_sgtable function which should be in kernel 3.5 Signed-off-by: Benjamin Gaignard <benjamin.gaignard(a)linaro.org> --- drivers/gpu/ion/Kconfig | 5 ++ drivers/gpu/ion/Makefile | 1 + drivers/gpu/ion/ion_cma_heap.c | 187 ++++++++++++++++++++++++++++++++++++++++ drivers/gpu/ion/ion_heap.c | 6 ++ drivers/gpu/ion/ion_priv.h | 14 +++ include/linux/ion.h | 3 + 6 files changed, 216 insertions(+) create mode 100644 drivers/gpu/ion/ion_cma_heap.c diff --git a/drivers/gpu/ion/Kconfig b/drivers/gpu/ion/Kconfig index b5bfdb4..ea0a896 100644 --- a/drivers/gpu/ion/Kconfig +++ b/drivers/gpu/ion/Kconfig @@ -5,6 +5,11 @@ menuconfig ION help Chose this option to enable the ION Memory Manager. +config ION_CMA + bool + default y + depends on CMA && ION + config ION_TEGRA tristate "Ion for Tegra" depends on ARCH_TEGRA && ION diff --git a/drivers/gpu/ion/Makefile b/drivers/gpu/ion/Makefile index d1ddebb..fddb85c 100644 --- a/drivers/gpu/ion/Makefile +++ b/drivers/gpu/ion/Makefile @@ -1,3 +1,4 @@ obj-$(CONFIG_ION) += ion.o ion_heap.o ion_page_pool.o ion_system_heap.o \ ion_carveout_heap.o +obj-$(CONFIG_ION_CMA) += ion_cma_heap.o obj-$(CONFIG_ION_TEGRA) += tegra/ diff --git a/drivers/gpu/ion/ion_cma_heap.c b/drivers/gpu/ion/ion_cma_heap.c new file mode 100644 index 0000000..543f891 --- /dev/null +++ b/drivers/gpu/ion/ion_cma_heap.c @@ -0,0 +1,187 @@ +/* + * drivers/gpu/ion/ion_cma_heap.c + * + * Copyright (C) Linaro 2012 + * Author: <benjamin.gaignard(a)linaro.org> for ST-Ericsson. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/device.h> +#include <linux/ion.h> +#include <linux/slab.h> +#include <linux/errno.h> +#include <linux/err.h> +#include <linux/dma-mapping.h> + +/* for ion_heap_ops structure */ +#include "ion_priv.h" + +#define ION_CMA_ALLOCATE_FAILED -1 + +struct ion_cma_buffer_info { + void *cpu_addr; + dma_addr_t handle; + struct sg_table *table; +}; + +/* + * Create scatter-list for the already allocated DMA buffer. + * This function could be replaced by dma_common_get_sgtable + * as soon as it will avalaible. + */ +int ion_cma_get_sgtable(struct device *dev, struct sg_table *sgt, + void *cpu_addr, dma_addr_t handle, size_t size) +{ + struct page *page = virt_to_page(cpu_addr); + int ret; + + ret = sg_alloc_table(sgt, 1, GFP_KERNEL); + if (unlikely(ret)) + return ret; + + sg_set_page(sgt->sgl, page, PAGE_ALIGN(size), 0); + return 0; +} + +/* ION CMA heap operations functions */ +static int ion_cma_allocate(struct ion_heap *heap, struct ion_buffer *buffer, + unsigned long len, unsigned long align, + unsigned long flags) +{ + struct device *dev = heap->priv; + struct ion_cma_buffer_info *info; + + dev_dbg(dev, "Request buffer allocation len %ld\n", len); + + info = kzalloc(sizeof(struct ion_cma_buffer_info), GFP_KERNEL); + if (!info) { + dev_err(dev, "Can't allocate buffer info\n"); + return ION_CMA_ALLOCATE_FAILED; + } + + info->cpu_addr = dma_alloc_coherent(dev, len, &(info->handle), 0); + + if (!info->cpu_addr) { + dev_err(dev, "Fail to allocate buffer\n"); + goto err; + } + + info->table = kmalloc(sizeof(struct sg_table), GFP_KERNEL); + if (!info->table) { + dev_err(dev, "Fail to allocate sg table\n"); + goto err; + } + + ion_cma_get_sgtable(dev, + info->table, info->cpu_addr, info->handle, len); + + /* keep this for memory release */ + buffer->priv_virt = info; + dev_dbg(dev, "Allocate buffer %p\n", buffer); + return 0; + +err: + kfree(info); + return ION_CMA_ALLOCATE_FAILED; +} + +static void ion_cma_free(struct ion_buffer *buffer) +{ + struct device *dev = buffer->heap->priv; + struct ion_cma_buffer_info *info = buffer->priv_virt; + + dev_dbg(dev, "Release buffer %p\n", buffer); + /* release memory */ + dma_free_coherent(dev, buffer->size, info->cpu_addr, info->handle); + /* release sg table */ + kfree(info->table); + kfree(info); +} + +/* return physical address in addr */ +static int ion_cma_phys(struct ion_heap *heap, struct ion_buffer *buffer, + ion_phys_addr_t *addr, size_t *len) +{ + struct device *dev = heap->priv; + struct ion_cma_buffer_info *info = buffer->priv_virt; + + dev_dbg(dev, "Return buffer %p physical address 0x%x\n", buffer, + virt_to_phys(info->cpu_addr)); + + *addr = virt_to_phys(info->cpu_addr); + *len = buffer->size; + + return 0; +} + +struct sg_table *ion_cma_heap_map_dma(struct ion_heap *heap, + struct ion_buffer *buffer) +{ + struct ion_cma_buffer_info *info = buffer->priv_virt; + + return info->table; +} + +void ion_cma_heap_unmap_dma(struct ion_heap *heap, + struct ion_buffer *buffer) +{ + return; +} + +static int ion_cma_mmap(struct ion_heap *mapper, struct ion_buffer *buffer, + struct vm_area_struct *vma) +{ + struct device *dev = buffer->heap->priv; + struct ion_cma_buffer_info *info = buffer->priv_virt; + + return dma_mmap_coherent(dev, vma, info->cpu_addr, info->handle, + buffer->size); +} + +void *ion_cma_map_kernel(struct ion_heap *heap, struct ion_buffer *buffer) +{ + struct ion_cma_buffer_info *info = buffer->priv_virt; + /* kernel memory mapping has been done at allocation time */ + return info->cpu_addr; +} + +static struct ion_heap_ops ion_cma_ops = { + .allocate = ion_cma_allocate, + .free = ion_cma_free, + .map_dma = ion_cma_heap_map_dma, + .unmap_dma = ion_cma_heap_unmap_dma, + .phys = ion_cma_phys, + .map_user = ion_cma_mmap, + .map_kernel = ion_cma_map_kernel, +}; + +struct ion_heap *ion_cma_heap_create(struct ion_platform_heap *data) +{ + struct ion_heap *heap; + + heap = kzalloc(sizeof(struct ion_heap), GFP_KERNEL); + + if (!heap) + return ERR_PTR(-ENOMEM); + + heap->ops = &ion_cma_ops; + /* set device as private heaps data, later it will be + * used to make the link with reserved CMA memory */ + heap->priv = data->priv; + heap->type = ION_HEAP_TYPE_DMA; + return heap; +} + +void ion_cma_heap_destroy(struct ion_heap *heap) +{ + kfree(heap); +} diff --git a/drivers/gpu/ion/ion_heap.c b/drivers/gpu/ion/ion_heap.c index f9ab1df..c960230 100644 --- a/drivers/gpu/ion/ion_heap.c +++ b/drivers/gpu/ion/ion_heap.c @@ -32,6 +32,9 @@ struct ion_heap *ion_heap_create(struct ion_platform_heap *heap_data) case ION_HEAP_TYPE_CARVEOUT: heap = ion_carveout_heap_create(heap_data); break; + case ION_HEAP_TYPE_DMA: + heap = ion_cma_heap_create(heap_data); + break; default: pr_err("%s: Invalid heap type %d\n", __func__, heap_data->type); @@ -66,6 +69,9 @@ void ion_heap_destroy(struct ion_heap *heap) case ION_HEAP_TYPE_CARVEOUT: ion_carveout_heap_destroy(heap); break; + case ION_HEAP_TYPE_DMA: + ion_cma_heap_destroy(heap); + break; default: pr_err("%s: Invalid heap type %d\n", __func__, heap->type); diff --git a/drivers/gpu/ion/ion_priv.h b/drivers/gpu/ion/ion_priv.h index a31203b..046f1a2 100644 --- a/drivers/gpu/ion/ion_priv.h +++ b/drivers/gpu/ion/ion_priv.h @@ -203,6 +203,20 @@ ion_phys_addr_t ion_carveout_allocate(struct ion_heap *heap, unsigned long size, unsigned long align); void ion_carveout_free(struct ion_heap *heap, ion_phys_addr_t addr, unsigned long size); + +#ifdef CONFIG_CMA +struct ion_heap *ion_cma_heap_create(struct ion_platform_heap *heap); +void ion_cma_heap_destroy(struct ion_heap *heap); +#else +static inline struct ion_heap *ion_cma_heap_create(struct ion_platform_heap + *heap) +{ + return NULL; +} + +static inline void ion_cma_heap_destroy(struct ion_heap *heap) {}; +#endif + /** * The carveout heap returns physical addresses, since 0 may be a valid * physical address, this is used to indicate allocation failed diff --git a/include/linux/ion.h b/include/linux/ion.h index b85f4b1..3ccc75a 100644 --- a/include/linux/ion.h +++ b/include/linux/ion.h @@ -27,6 +27,7 @@ struct ion_handle; * @ION_HEAP_TYPE_CARVEOUT: memory allocated from a prereserved * carveout heap, allocations are physically * contiguous + * @ION_HEAP_TYPE_DMA: memory allocated via DMA API * @ION_NUM_HEAPS: helper for iterating over heaps, a bit mask * is used to identify the heaps, so only 32 * total heap types are supported @@ -35,6 +36,7 @@ enum ion_heap_type { ION_HEAP_TYPE_SYSTEM, ION_HEAP_TYPE_SYSTEM_CONTIG, ION_HEAP_TYPE_CARVEOUT, + ION_HEAP_TYPE_DMA, ION_HEAP_TYPE_CUSTOM, /* must be last so device specific heaps always are at the end of this enum */ ION_NUM_HEAPS = 16, @@ -43,6 +45,7 @@ enum ion_heap_type { #define ION_HEAP_SYSTEM_MASK (1 << ION_HEAP_TYPE_SYSTEM) #define ION_HEAP_SYSTEM_CONTIG_MASK (1 << ION_HEAP_TYPE_SYSTEM_CONTIG) #define ION_HEAP_CARVEOUT_MASK (1 << ION_HEAP_TYPE_CARVEOUT) +#define ION_HEAP_TYPE_DMA_MASK (1 << ION_HEAP_TYPE_DMA) /** * heap flags - the lower 16 bits are used by core ion, the upper 16 -- 1.7.10

12 years, 6 months

[PATCH v7 3/3] gpu: ion: add CMA heap

by Benjamin Gaignard

New heap type ION_HEAP_TYPE_DMA where allocation is done with dma_alloc_coherent API. device coherent_dma_mask must be set to DMA_BIT_MASK(32). ion_platform_heap private field is used to retrieve the device linked to CMA, if NULL the default CMA area is used. ion_cma_get_sgtable is a copy of dma_common_get_sgtable function which should be in kernel 3.5 Signed-off-by: Benjamin Gaignard <benjamin.gaignard(a)linaro.org> --- drivers/gpu/ion/Kconfig | 5 ++ drivers/gpu/ion/Makefile | 1 + drivers/gpu/ion/ion_cma_heap.c | 192 ++++++++++++++++++++++++++++++++++++++++ drivers/gpu/ion/ion_heap.c | 6 ++ drivers/gpu/ion/ion_priv.h | 14 +++ include/linux/ion.h | 3 + 6 files changed, 221 insertions(+) create mode 100644 drivers/gpu/ion/ion_cma_heap.c diff --git a/drivers/gpu/ion/Kconfig b/drivers/gpu/ion/Kconfig index b5bfdb4..ea0a896 100644 --- a/drivers/gpu/ion/Kconfig +++ b/drivers/gpu/ion/Kconfig @@ -5,6 +5,11 @@ menuconfig ION help Chose this option to enable the ION Memory Manager. +config ION_CMA + bool + default y + depends on CMA && ION + config ION_TEGRA tristate "Ion for Tegra" depends on ARCH_TEGRA && ION diff --git a/drivers/gpu/ion/Makefile b/drivers/gpu/ion/Makefile index d1ddebb..fddb85c 100644 --- a/drivers/gpu/ion/Makefile +++ b/drivers/gpu/ion/Makefile @@ -1,3 +1,4 @@ obj-$(CONFIG_ION) += ion.o ion_heap.o ion_page_pool.o ion_system_heap.o \ ion_carveout_heap.o +obj-$(CONFIG_ION_CMA) += ion_cma_heap.o obj-$(CONFIG_ION_TEGRA) += tegra/ diff --git a/drivers/gpu/ion/ion_cma_heap.c b/drivers/gpu/ion/ion_cma_heap.c new file mode 100644 index 0000000..b44e0e0 --- /dev/null +++ b/drivers/gpu/ion/ion_cma_heap.c @@ -0,0 +1,192 @@ +/* + * drivers/gpu/ion/ion_cma_heap.c + * + * Copyright (C) Linaro 2012 + * Author: <benjamin.gaignard(a)linaro.org> for ST-Ericsson. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/device.h> +#include <linux/ion.h> +#include <linux/slab.h> +#include <linux/errno.h> +#include <linux/err.h> +#include <linux/dma-mapping.h> + +/* for ion_heap_ops structure */ +#include "ion_priv.h" + +#define ION_CMA_ALLOCATE_FAILED -1 + +struct ion_cma_buffer_info { + void *cpu_addr; + dma_addr_t handle; + struct sg_table *table; +}; + +/* + * Create scatter-list for the already allocated DMA buffer. + * This function could be replaced by dma_common_get_sgtable + * as soon as it will avalaible. + */ +int ion_cma_get_sgtable(struct device *dev, struct sg_table *sgt, + void *cpu_addr, dma_addr_t handle, size_t size) +{ + struct page *page = virt_to_page(cpu_addr); + int ret; + + ret = sg_alloc_table(sgt, 1, GFP_KERNEL); + if (unlikely(ret)) + return ret; + + sg_set_page(sgt->sgl, page, PAGE_ALIGN(size), 0); + return 0; +} + +/* ION CMA heap operations functions */ +static int ion_cma_allocate(struct ion_heap *heap, struct ion_buffer *buffer, + unsigned long len, unsigned long align, + unsigned long flags) +{ + struct device *dev = heap->priv; + struct ion_cma_buffer_info *info; + + dev_dbg(dev, "Request buffer allocation len %ld\n", len); + + info = kzalloc(sizeof(struct ion_cma_buffer_info), GFP_KERNEL); + if (!info) { + dev_err(dev, "Can't allocate buffer info\n"); + return ION_CMA_ALLOCATE_FAILED; + } + + info->cpu_addr = dma_alloc_coherent(dev, len, &(info->handle), 0); + + if (!info->cpu_addr) { + dev_err(dev, "Fail to allocate buffer\n"); + goto err; + } + + info->table = kmalloc(sizeof(struct sg_table), GFP_KERNEL); + if (!info->table) { + dev_err(dev, "Fail to allocate sg table\n"); + goto free_mem; + } + + if (ion_cma_get_sgtable + (dev, info->table, info->cpu_addr, info->handle, len)) + goto free_table; + + /* keep this for memory release */ + buffer->priv_virt = info; + dev_dbg(dev, "Allocate buffer %p\n", buffer); + return 0; + +free_table: + kfree(info->table); +free_mem: + dma_free_coherent(dev, len, info->cpu_addr, info->handle); +err: + kfree(info); + return ION_CMA_ALLOCATE_FAILED; +} + +static void ion_cma_free(struct ion_buffer *buffer) +{ + struct device *dev = buffer->heap->priv; + struct ion_cma_buffer_info *info = buffer->priv_virt; + + dev_dbg(dev, "Release buffer %p\n", buffer); + /* release memory */ + dma_free_coherent(dev, buffer->size, info->cpu_addr, info->handle); + /* release sg table */ + sg_free_table(info->table); + kfree(info->table); + kfree(info); +} + +/* return physical address in addr */ +static int ion_cma_phys(struct ion_heap *heap, struct ion_buffer *buffer, + ion_phys_addr_t *addr, size_t *len) +{ + struct device *dev = heap->priv; + struct ion_cma_buffer_info *info = buffer->priv_virt; + + dev_dbg(dev, "Return buffer %p physical address 0x%x\n", buffer, + virt_to_phys(info->cpu_addr)); + + *addr = virt_to_phys(info->cpu_addr); + *len = buffer->size; + + return 0; +} + +struct sg_table *ion_cma_heap_map_dma(struct ion_heap *heap, + struct ion_buffer *buffer) +{ + struct ion_cma_buffer_info *info = buffer->priv_virt; + + return info->table; +} + +void ion_cma_heap_unmap_dma(struct ion_heap *heap, struct ion_buffer *buffer) +{ + return; +} + +static int ion_cma_mmap(struct ion_heap *mapper, struct ion_buffer *buffer, + struct vm_area_struct *vma) +{ + struct device *dev = buffer->heap->priv; + struct ion_cma_buffer_info *info = buffer->priv_virt; + + return dma_mmap_coherent(dev, vma, info->cpu_addr, info->handle, + buffer->size); +} + +void *ion_cma_map_kernel(struct ion_heap *heap, struct ion_buffer *buffer) +{ + struct ion_cma_buffer_info *info = buffer->priv_virt; + /* kernel memory mapping has been done at allocation time */ + return info->cpu_addr; +} + +static struct ion_heap_ops ion_cma_ops = { + .allocate = ion_cma_allocate, + .free = ion_cma_free, + .map_dma = ion_cma_heap_map_dma, + .unmap_dma = ion_cma_heap_unmap_dma, + .phys = ion_cma_phys, + .map_user = ion_cma_mmap, + .map_kernel = ion_cma_map_kernel, +}; + +struct ion_heap *ion_cma_heap_create(struct ion_platform_heap *data) +{ + struct ion_heap *heap; + + heap = kzalloc(sizeof(struct ion_heap), GFP_KERNEL); + + if (!heap) + return ERR_PTR(-ENOMEM); + + heap->ops = &ion_cma_ops; + /* set device as private heaps data, later it will be + * used to make the link with reserved CMA memory */ + heap->priv = data->priv; + heap->type = ION_HEAP_TYPE_DMA; + return heap; +} + +void ion_cma_heap_destroy(struct ion_heap *heap) +{ + kfree(heap); +} diff --git a/drivers/gpu/ion/ion_heap.c b/drivers/gpu/ion/ion_heap.c index f9ab1df..c960230 100644 --- a/drivers/gpu/ion/ion_heap.c +++ b/drivers/gpu/ion/ion_heap.c @@ -32,6 +32,9 @@ struct ion_heap *ion_heap_create(struct ion_platform_heap *heap_data) case ION_HEAP_TYPE_CARVEOUT: heap = ion_carveout_heap_create(heap_data); break; + case ION_HEAP_TYPE_DMA: + heap = ion_cma_heap_create(heap_data); + break; default: pr_err("%s: Invalid heap type %d\n", __func__, heap_data->type); @@ -66,6 +69,9 @@ void ion_heap_destroy(struct ion_heap *heap) case ION_HEAP_TYPE_CARVEOUT: ion_carveout_heap_destroy(heap); break; + case ION_HEAP_TYPE_DMA: + ion_cma_heap_destroy(heap); + break; default: pr_err("%s: Invalid heap type %d\n", __func__, heap->type); diff --git a/drivers/gpu/ion/ion_priv.h b/drivers/gpu/ion/ion_priv.h index a31203b..046f1a2 100644 --- a/drivers/gpu/ion/ion_priv.h +++ b/drivers/gpu/ion/ion_priv.h @@ -203,6 +203,20 @@ ion_phys_addr_t ion_carveout_allocate(struct ion_heap *heap, unsigned long size, unsigned long align); void ion_carveout_free(struct ion_heap *heap, ion_phys_addr_t addr, unsigned long size); + +#ifdef CONFIG_CMA +struct ion_heap *ion_cma_heap_create(struct ion_platform_heap *heap); +void ion_cma_heap_destroy(struct ion_heap *heap); +#else +static inline struct ion_heap *ion_cma_heap_create(struct ion_platform_heap + *heap) +{ + return NULL; +} + +static inline void ion_cma_heap_destroy(struct ion_heap *heap) {}; +#endif + /** * The carveout heap returns physical addresses, since 0 may be a valid * physical address, this is used to indicate allocation failed diff --git a/include/linux/ion.h b/include/linux/ion.h index b85f4b1..3ccc75a 100644 --- a/include/linux/ion.h +++ b/include/linux/ion.h @@ -27,6 +27,7 @@ struct ion_handle; * @ION_HEAP_TYPE_CARVEOUT: memory allocated from a prereserved * carveout heap, allocations are physically * contiguous + * @ION_HEAP_TYPE_DMA: memory allocated via DMA API * @ION_NUM_HEAPS: helper for iterating over heaps, a bit mask * is used to identify the heaps, so only 32 * total heap types are supported @@ -35,6 +36,7 @@ enum ion_heap_type { ION_HEAP_TYPE_SYSTEM, ION_HEAP_TYPE_SYSTEM_CONTIG, ION_HEAP_TYPE_CARVEOUT, + ION_HEAP_TYPE_DMA, ION_HEAP_TYPE_CUSTOM, /* must be last so device specific heaps always are at the end of this enum */ ION_NUM_HEAPS = 16, @@ -43,6 +45,7 @@ enum ion_heap_type { #define ION_HEAP_SYSTEM_MASK (1 << ION_HEAP_TYPE_SYSTEM) #define ION_HEAP_SYSTEM_CONTIG_MASK (1 << ION_HEAP_TYPE_SYSTEM_CONTIG) #define ION_HEAP_CARVEOUT_MASK (1 << ION_HEAP_TYPE_CARVEOUT) +#define ION_HEAP_TYPE_DMA_MASK (1 << ION_HEAP_TYPE_DMA) /** * heap flags - the lower 16 bits are used by core ion, the upper 16 -- 1.7.10

12 years, 6 months

[PATCH v7 3/3] gpu: ion: add CMA heap

by benjamin.gaignard＠linaro.org

From: Benjamin Gaignard <benjamin.gaignard(a)linaro.org> New heap type ION_HEAP_TYPE_DMA where allocation is done with dma_alloc_coherent API. device coherent_dma_mask must be set to DMA_BIT_MASK(32). ion_platform_heap private field is used to retrieve the device linked to CMA, if NULL the default CMA area is used. ion_cma_get_sgtable is a copy of dma_common_get_sgtable function which should be in kernel 3.5 Change-Id: I31bb25360f69f3744c1984f6d83f9d939090a81f Signed-off-by: Benjamin Gaignard <benjamin.gaignard(a)linaro.org> --- drivers/gpu/ion/Kconfig | 5 ++ drivers/gpu/ion/Makefile | 1 + drivers/gpu/ion/ion_cma_heap.c | 189 ++++++++++++++++++++++++++++++++++++++++ drivers/gpu/ion/ion_heap.c | 6 ++ drivers/gpu/ion/ion_priv.h | 14 +++ include/linux/ion.h | 3 + 6 files changed, 218 insertions(+) create mode 100644 drivers/gpu/ion/ion_cma_heap.c diff --git a/drivers/gpu/ion/Kconfig b/drivers/gpu/ion/Kconfig index b5bfdb4..ea0a896 100644 --- a/drivers/gpu/ion/Kconfig +++ b/drivers/gpu/ion/Kconfig @@ -5,6 +5,11 @@ menuconfig ION help Chose this option to enable the ION Memory Manager. +config ION_CMA + bool + default y + depends on CMA && ION + config ION_TEGRA tristate "Ion for Tegra" depends on ARCH_TEGRA && ION diff --git a/drivers/gpu/ion/Makefile b/drivers/gpu/ion/Makefile index d1ddebb..fddb85c 100644 --- a/drivers/gpu/ion/Makefile +++ b/drivers/gpu/ion/Makefile @@ -1,3 +1,4 @@ obj-$(CONFIG_ION) += ion.o ion_heap.o ion_page_pool.o ion_system_heap.o \ ion_carveout_heap.o +obj-$(CONFIG_ION_CMA) += ion_cma_heap.o obj-$(CONFIG_ION_TEGRA) += tegra/ diff --git a/drivers/gpu/ion/ion_cma_heap.c b/drivers/gpu/ion/ion_cma_heap.c new file mode 100644 index 0000000..22bbf2d --- /dev/null +++ b/drivers/gpu/ion/ion_cma_heap.c @@ -0,0 +1,189 @@ +/* + * drivers/gpu/ion/ion_cma_heap.c + * + * Copyright (C) Linaro 2012 + * Author: <benjamin.gaignard(a)linaro.org> for ST-Ericsson. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/device.h> +#include <linux/ion.h> +#include <linux/slab.h> +#include <linux/errno.h> +#include <linux/err.h> +#include <linux/dma-mapping.h> + +/* for ion_heap_ops structure */ +#include "ion_priv.h" + +#define ION_CMA_ALLOCATE_FAILED -1 + +struct ion_cma_buffer_info { + void *cpu_addr; + dma_addr_t handle; + struct sg_table *table; +}; + +/* + * Create scatter-list for the already allocated DMA buffer. + * This function could be replaced by dma_common_get_sgtable + * as soon as it will avalaible. + */ +int ion_cma_get_sgtable(struct device *dev, struct sg_table *sgt, + void *cpu_addr, dma_addr_t handle, size_t size) +{ + struct page *page = virt_to_page(cpu_addr); + int ret; + + ret = sg_alloc_table(sgt, 1, GFP_KERNEL); + if (unlikely(ret)) + return ret; + + sg_set_page(sgt->sgl, page, PAGE_ALIGN(size), 0); + return 0; +} + +/* ION CMA heap operations functions */ +static int ion_cma_allocate(struct ion_heap *heap, struct ion_buffer *buffer, + unsigned long len, unsigned long align, + unsigned long flags) +{ + struct device *dev = heap->priv; + struct ion_cma_buffer_info *info; + + dev_dbg(dev, "Request buffer allocation len %ld\n", len); + + info = kzalloc(sizeof(struct ion_cma_buffer_info), GFP_KERNEL); + if (!info) { + dev_err(dev, "Can't allocate buffer info\n"); + return ION_CMA_ALLOCATE_FAILED; + } + + info->cpu_addr = dma_alloc_coherent(dev, len, &(info->handle), 0); + + if (!info->cpu_addr) { + dev_err(dev, "Fail to allocate buffer\n"); + goto err; + } + + info->table = kmalloc(sizeof(struct sg_table), GFP_KERNEL); + if (!info->table) { + dev_err(dev, "Fail to allocate sg table\n"); + goto err; + } + + if (ion_cma_get_sgtable + (dev, info->table, info->cpu_addr, info->handle, len)) + goto free_table; + + /* keep this for memory release */ + buffer->priv_virt = info; + dev_dbg(dev, "Allocate buffer %p\n", buffer); + return 0; + +free_table: + sg_free_table(info->table); +err: + kfree(info); + return ION_CMA_ALLOCATE_FAILED; +} + +static void ion_cma_free(struct ion_buffer *buffer) +{ + struct device *dev = buffer->heap->priv; + struct ion_cma_buffer_info *info = buffer->priv_virt; + + dev_dbg(dev, "Release buffer %p\n", buffer); + /* release memory */ + dma_free_coherent(dev, buffer->size, info->cpu_addr, info->handle); + /* release sg table */ + sg_free_table(info->table); + kfree(info); +} + +/* return physical address in addr */ +static int ion_cma_phys(struct ion_heap *heap, struct ion_buffer *buffer, + ion_phys_addr_t *addr, size_t *len) +{ + struct device *dev = heap->priv; + struct ion_cma_buffer_info *info = buffer->priv_virt; + + dev_dbg(dev, "Return buffer %p physical address 0x%x\n", buffer, + virt_to_phys(info->cpu_addr)); + + *addr = virt_to_phys(info->cpu_addr); + *len = buffer->size; + + return 0; +} + +struct sg_table *ion_cma_heap_map_dma(struct ion_heap *heap, + struct ion_buffer *buffer) +{ + struct ion_cma_buffer_info *info = buffer->priv_virt; + + return info->table; +} + +void ion_cma_heap_unmap_dma(struct ion_heap *heap, struct ion_buffer *buffer) +{ + return; +} + +static int ion_cma_mmap(struct ion_heap *mapper, struct ion_buffer *buffer, + struct vm_area_struct *vma) +{ + struct device *dev = buffer->heap->priv; + struct ion_cma_buffer_info *info = buffer->priv_virt; + + return dma_mmap_coherent(dev, vma, info->cpu_addr, info->handle, + buffer->size); +} + +void *ion_cma_map_kernel(struct ion_heap *heap, struct ion_buffer *buffer) +{ + struct ion_cma_buffer_info *info = buffer->priv_virt; + /* kernel memory mapping has been done at allocation time */ + return info->cpu_addr; +} + +static struct ion_heap_ops ion_cma_ops = { + .allocate = ion_cma_allocate, + .free = ion_cma_free, + .map_dma = ion_cma_heap_map_dma, + .unmap_dma = ion_cma_heap_unmap_dma, + .phys = ion_cma_phys, + .map_user = ion_cma_mmap, + .map_kernel = ion_cma_map_kernel, +}; + +struct ion_heap *ion_cma_heap_create(struct ion_platform_heap *data) +{ + struct ion_heap *heap; + + heap = kzalloc(sizeof(struct ion_heap), GFP_KERNEL); + + if (!heap) + return ERR_PTR(-ENOMEM); + + heap->ops = &ion_cma_ops; + /* set device as private heaps data, later it will be + * used to make the link with reserved CMA memory */ + heap->priv = data->priv; + heap->type = ION_HEAP_TYPE_DMA; + return heap; +} + +void ion_cma_heap_destroy(struct ion_heap *heap) +{ + kfree(heap); +} diff --git a/drivers/gpu/ion/ion_heap.c b/drivers/gpu/ion/ion_heap.c index f9ab1df..c960230 100644 --- a/drivers/gpu/ion/ion_heap.c +++ b/drivers/gpu/ion/ion_heap.c @@ -32,6 +32,9 @@ struct ion_heap *ion_heap_create(struct ion_platform_heap *heap_data) case ION_HEAP_TYPE_CARVEOUT: heap = ion_carveout_heap_create(heap_data); break; + case ION_HEAP_TYPE_DMA: + heap = ion_cma_heap_create(heap_data); + break; default: pr_err("%s: Invalid heap type %d\n", __func__, heap_data->type); @@ -66,6 +69,9 @@ void ion_heap_destroy(struct ion_heap *heap) case ION_HEAP_TYPE_CARVEOUT: ion_carveout_heap_destroy(heap); break; + case ION_HEAP_TYPE_DMA: + ion_cma_heap_destroy(heap); + break; default: pr_err("%s: Invalid heap type %d\n", __func__, heap->type); diff --git a/drivers/gpu/ion/ion_priv.h b/drivers/gpu/ion/ion_priv.h index a31203b..046f1a2 100644 --- a/drivers/gpu/ion/ion_priv.h +++ b/drivers/gpu/ion/ion_priv.h @@ -203,6 +203,20 @@ ion_phys_addr_t ion_carveout_allocate(struct ion_heap *heap, unsigned long size, unsigned long align); void ion_carveout_free(struct ion_heap *heap, ion_phys_addr_t addr, unsigned long size); + +#ifdef CONFIG_CMA +struct ion_heap *ion_cma_heap_create(struct ion_platform_heap *heap); +void ion_cma_heap_destroy(struct ion_heap *heap); +#else +static inline struct ion_heap *ion_cma_heap_create(struct ion_platform_heap + *heap) +{ + return NULL; +} + +static inline void ion_cma_heap_destroy(struct ion_heap *heap) {}; +#endif + /** * The carveout heap returns physical addresses, since 0 may be a valid * physical address, this is used to indicate allocation failed diff --git a/include/linux/ion.h b/include/linux/ion.h index b85f4b1..3ccc75a 100644 --- a/include/linux/ion.h +++ b/include/linux/ion.h @@ -27,6 +27,7 @@ struct ion_handle; * @ION_HEAP_TYPE_CARVEOUT: memory allocated from a prereserved * carveout heap, allocations are physically * contiguous + * @ION_HEAP_TYPE_DMA: memory allocated via DMA API * @ION_NUM_HEAPS: helper for iterating over heaps, a bit mask * is used to identify the heaps, so only 32 * total heap types are supported @@ -35,6 +36,7 @@ enum ion_heap_type { ION_HEAP_TYPE_SYSTEM, ION_HEAP_TYPE_SYSTEM_CONTIG, ION_HEAP_TYPE_CARVEOUT, + ION_HEAP_TYPE_DMA, ION_HEAP_TYPE_CUSTOM, /* must be last so device specific heaps always are at the end of this enum */ ION_NUM_HEAPS = 16, @@ -43,6 +45,7 @@ enum ion_heap_type { #define ION_HEAP_SYSTEM_MASK (1 << ION_HEAP_TYPE_SYSTEM) #define ION_HEAP_SYSTEM_CONTIG_MASK (1 << ION_HEAP_TYPE_SYSTEM_CONTIG) #define ION_HEAP_CARVEOUT_MASK (1 << ION_HEAP_TYPE_CARVEOUT) +#define ION_HEAP_TYPE_DMA_MASK (1 << ION_HEAP_TYPE_DMA) /** * heap flags - the lower 16 bits are used by core ion, the upper 16 -- 1.7.10

12 years, 6 months

[PATCH v7 2/3] gpu: ion: add private field in ion_heap and ion_platform_heap structure

by benjamin.gaignard＠linaro.org

From: Benjamin Gaignard <benjamin.gaignard(a)linaro.org> copy private field from platform configuration to internal heap structure. Signed-off-by: Benjamin Gaignard <benjamin.gaignard(a)linaro.org> --- drivers/gpu/ion/ion_heap.c | 1 + drivers/gpu/ion/ion_priv.h | 2 ++ include/linux/ion.h | 2 ++ 3 files changed, 5 insertions(+) diff --git a/drivers/gpu/ion/ion_heap.c b/drivers/gpu/ion/ion_heap.c index 8ce3c19..f9ab1df 100644 --- a/drivers/gpu/ion/ion_heap.c +++ b/drivers/gpu/ion/ion_heap.c @@ -47,6 +47,7 @@ struct ion_heap *ion_heap_create(struct ion_platform_heap *heap_data) heap->name = heap_data->name; heap->id = heap_data->id; + heap->priv = heap_data->priv; return heap; } diff --git a/drivers/gpu/ion/ion_priv.h b/drivers/gpu/ion/ion_priv.h index 21c1963..a31203b 100644 --- a/drivers/gpu/ion/ion_priv.h +++ b/drivers/gpu/ion/ion_priv.h @@ -117,6 +117,7 @@ struct ion_heap_ops { * allocating. These are specified by platform data and * MUST be unique * @name: used for debugging + * @priv: heap private data * @debug_show: called when heap debug file is read to add any * heap specific debug info to output * @@ -132,6 +133,7 @@ struct ion_heap { struct ion_heap_ops *ops; int id; const char *name; + void *priv; int (*debug_show)(struct ion_heap *heap, struct seq_file *, void *); }; diff --git a/include/linux/ion.h b/include/linux/ion.h index 6541a11..b85f4b1 100644 --- a/include/linux/ion.h +++ b/include/linux/ion.h @@ -77,6 +77,7 @@ struct ion_buffer; * @name: used for debug purposes * @base: base address of heap in physical memory if applicable * @size: size of the heap in bytes if applicable + * @priv: heap private data * * Provided by the board file. */ @@ -86,6 +87,7 @@ struct ion_platform_heap { const char *name; ion_phys_addr_t base; size_t size; + void *priv; }; /** -- 1.7.10

12 years, 6 months

[PATCH v7 1/3] gpu: ion: fix ion_platform_data definition

by benjamin.gaignard＠linaro.org

From: Benjamin Gaignard <benjamin.gaignard(a)linaro.org> fix ion_platform_heap to make is use an usual way in board configuration file. Signed-off-by: Benjamin Gaignard <benjamin.gaignard(a)linaro.org> --- include/linux/ion.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/ion.h b/include/linux/ion.h index a7d399c..6541a11 100644 --- a/include/linux/ion.h +++ b/include/linux/ion.h @@ -97,7 +97,7 @@ struct ion_platform_heap { */ struct ion_platform_data { int nr; - struct ion_platform_heap heaps[]; + struct ion_platform_heap *heaps; }; /** -- 1.7.10

12 years, 6 months

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