Linaro-mm-sig

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3030 discussions

Question about ION carveout heap support partial cache flush

by zhangfei gao

Hi, All We met question about dmac_map_area & dmac_flush_range from user addr. mcr would not return on armv7 processor. Existing ion carveout heap does not support partial cache flush. Total cache will be flushed at all. There is only one dirty bit for carveout heap, as well as sg_table->nents. drivers/gpu/ion/ion_carveout_heap.c ion_carveout_heap_map_dma -> sg_alloc_table(table, 1, GFP_KERNEL); ion_buffer_alloc_dirty -> pages = buffer->sg_table->nents; We want to support partial cache flush. Align to cache line, instead of PAGE_SIZE, for efficiency consideration. We have considered extended dirty bit, but looks like only align to PAGE_SIZE. For experiment we modify ioctl ION_IOC_SYNC on armv7. And directly use dmac_map_area & dmac_flush_range with add from user space. However, we find dmac_map_area can not work with this addr from user space. In fact, it is mcr can not work with addr from user space, it would hung. Also, ion_vm_falut would happen twice. The first time is from __dabt_usr, when we access the mmaped buffer, it is fine. The second is from __davt_svc, it is caused by mcr, it is strange? ION malloc carveout heap addr = user mmap user access addr, ion_vm_fault (__dabt_usr), build page table, and vm_insert_page. dmac_map_area & dmac_flush_range with addr -> ion_vm_fault (__davt_svc) mcr hung. Not understand why ion_vm_fault happen twice, where page table has been build. Why mcr will hung with addr from user space. Besides, no problem with ION on 3.0, which do not use ion_vm_fault. Any suggestion? Thanks

13 years

Patch to show debugfs output for every heap->id instead of heap->type

by Nishanth Peethambaran

Hi, ION debugfs currently shows/groups output based on type. But, it is possible to have multiple heaps of the same type - for CMA and carveout types. It is more useful to get usage information for individual heaps. - Nishanth Peethambaran >From fa819b42fb69321a8e5db260ba9fd8ce7a2f16d2 Mon Sep 17 00:00:00 2001 From: Nishanth Peethambaran <nishanth(a)broadcom.com> Date: Tue, 28 Aug 2012 07:57:37 +0530 Subject: [PATCH] gpu: ion: Update debugfs to show for each id Update the debugfs read of client and heap to show based on 'id' instead of 'type'. Multiple heaps of the same type can be present, but id is unique. --- drivers/gpu/ion/ion.c | 14 +++++++------- 1 files changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/ion/ion.c b/drivers/gpu/ion/ion.c index 34c12df..65cedee 100644 --- a/drivers/gpu/ion/ion.c +++ b/drivers/gpu/ion/ion.c @@ -547,11 +547,11 @@ 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); @@ -1121,7 +1121,7 @@ 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; @@ -1131,7 +1131,7 @@ 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); @@ -1149,7 +1149,7 @@ 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) { -- 1.7.0.4

13 years

sharing across process of ion/dma_buf created after fork

by Nishanth Peethambaran

How do we share ion buffers from user-space with other processes if they are exported/shared after fork? The ION_IOC_SHARE ioctl creates an fd for process-1. In 3.0 kernel, the ION_ION_IMPORT ioctl from process-2 calls ion_import_fd which calls fget(fd) which fails to find the file for the fd shared by process-1. In 3.4 kernel, dma_buf_get does the fget(fd) to get struct file which also fails for the same reason - fget searches in current->files. - Nishanth Peethambaran

13 years

ioremap issue in ION carveout heap

by Haojian Zhuang

Hi all, I think that we have a memory mapping issue on ION carveout heap for v3.4+ kernel from android. The scenario is User app + kernel driver (cpu) + kernel driver (dma) that all these three clients will access memory. And the memory is cacheable. The .map_kernel() of carveout heap remaps the allocated memory buffer by ioremap(). In arm_ioremap(), we don't allow memory to be mapped. In order to make .map_kernel() working, we need to use memblock_alloc() & memblock_remove() to move the heap memory from system to reserved area. So the linear address of the memory buffer is removed from page table. And the new virtual address comes from .map_kernel() while kernel driver wants to access the buffer. But ION use dma_sync_sg_for_devices() to flush cache that means they're using linear address from page. So they're using the NOT-EXISTED virtual address that is removed by memblock_remove(). Solution #1. .map_kernel() only returns the linear address. And there's a limitation of this solution, the heap should be always lying in low memory. So we needn't use any ioremap() and memblock_remove() any more. Solution #2. Use vmap() in .map_kernel(). How do you think about these two solutions? Regards Haojian

13 years

[PATCH] mm: cma: fix alignment requirements for contiguous regions

by Marek Szyprowski

Contiguous Memory Allocator requires each of its regions to be aligned in such a way that it is possible to change migration type for all pageblocks holding it and then isolate page of largest possible order from the buddy allocator (which is MAX_ORDER-1). This patch relaxes alignment requirements by one order, because MAX_ORDER alignment is not really needed. Signed-off-by: Marek Szyprowski <m.szyprowski(a)samsung.com> CC: Michal Nazarewicz <mina86(a)mina86.com> --- drivers/base/dma-contiguous.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c index 78efb03..34d94c7 100644 --- a/drivers/base/dma-contiguous.c +++ b/drivers/base/dma-contiguous.c @@ -250,7 +250,7 @@ int __init dma_declare_contiguous(struct device *dev, unsigned long size, return -EINVAL; /* Sanitise input arguments */ - alignment = PAGE_SIZE << max(MAX_ORDER, pageblock_order); + alignment = PAGE_SIZE << max(MAX_ORDER - 1, pageblock_order); base = ALIGN(base, alignment); size = ALIGN(size, alignment); limit &= ~(alignment - 1); -- 1.7.1.569.g6f426

13 years

[v3 0/4] ARM: dma-mapping: IOMMU atomic allocation

by Hiroshi Doyu

Hi, The commit e9da6e9 "ARM: dma-mapping: remove custom consistent dma region" breaks the compatibility with existing drivers. This causes the following kernel oops(*1). That driver has called dma_pool_alloc() to allocate memory from the interrupt context, and it hits BUG_ON(in_interrpt()) in "get_vm_area_caller()". This patch seris fixes this problem with making use of the pre-allocate atomic memory pool which DMA is using in the same way as DMA does now. Any comment would be really appreciated. v3: Provide a different path for IOMMU for more clean code. (Marek) atomic_pool is backed with struct page *pages[]. v2: Don't modify attrs(DMA_ATTR_NO_KERNEL_MAPPING) for atomic allocation. (Marek) Modify vzalloc (KyongHo, Minchan) v1: http://lists.linaro.org/pipermail/linaro-mm-sig/2012-August/002398.html *1: [ 8.321343] ------------[ cut here ]------------ [ 8.325971] kernel BUG at kernel/mm/vmalloc.c:1322! [ 8.333615] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM [ 8.339436] Modules linked in: [ 8.342496] CPU: 0 Tainted: G W (3.4.6-00067-g5d485f7 #67) [ 8.349192] PC is at __get_vm_area_node.isra.29+0x164/0x16c [ 8.354758] LR is at get_vm_area_caller+0x4c/0x54 [ 8.359454] pc : [<c011297c>] lr : [<c011318c>] psr: 20000193 [ 8.359458] sp : c09edca0 ip : c09ec000 fp : ae278000 [ 8.370922] r10: f0000000 r9 : c011aa54 r8 : c0a26cb8 [ 8.376136] r7 : 00000001 r6 : 000000d0 r5 : 20000008 r4 : c09edca0 [ 8.382651] r3 : 00010000 r2 : 20000008 r1 : 00000001 r0 : 00001000 [ 8.389166] Flags: nzCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment kernel [ 8.396549] Control: 10c5387d Table: ad98c04a DAC: 00000015 .... [ 9.169162] dfa0: 412fc099 c09ec000 00000000 c000fdd8 c06df1e4 c0a1b080 00000000 00000000 [ 9.177329] dfc0: c0a235cc 8000406a 00000000 c0986818 ffffffff ffffffff c0986404 00000000 [ 9.185497] dfe0: 00000000 c09bb070 10c5387d c0a19c58 c09bb064 80008044 00000000 00000000 [ 9.193673] [<c011297c>] (__get_vm_area_node.isra.29+0x164/0x16c) from [<c011318c>] (get_vm_area_caller+0x4c/0x54) [ 9.204022] [<c011318c>] (get_vm_area_caller+0x4c/0x54) from [<c001aed8>] (__iommu_alloc_remap.isra.14+0x2c/0xfc) [ 9.214276] [<c001aed8>] (__iommu_alloc_remap.isra.14+0x2c/0xfc) from [<c001b06c>] (arm_iommu_alloc_attrs+0xc4/0xf8) [ 9.224795] [<c001b06c>] (arm_iommu_alloc_attrs+0xc4/0xf8) from [<c011aa54>] (pool_alloc_page.constprop.5+0x6c/0xf8) [ 9.235309] [<c011aa54>] (pool_alloc_page.constprop.5+0x6c/0xf8) from [<c011ab60>] (dma_pool_alloc+0x80/0x170) [ 9.245304] [<c011ab60>] (dma_pool_alloc+0x80/0x170) from [<c03cbbcc>] (tegra_build_dtd+0x48/0x14c) [ 9.254344] [<c03cbbcc>] (tegra_build_dtd+0x48/0x14c) from [<c03cbd4c>] (tegra_req_to_dtd+0x7c/0xa8) [ 9.263467] [<c03cbd4c>] (tegra_req_to_dtd+0x7c/0xa8) from [<c03cc140>] (tegra_ep_queue+0x154/0x33c) [ 9.272592] [<c03cc140>] (tegra_ep_queue+0x154/0x33c) from [<c03dd5b4>] (composite_setup+0x364/0x6d4) [ 9.281804] [<c03dd5b4>] (composite_setup+0x364/0x6d4) from [<c03dd9dc>] (android_setup+0xb8/0x14c) [ 9.290843] [<c03dd9dc>] (android_setup+0xb8/0x14c) from [<c03cd144>] (setup_received_irq+0xbc/0x270) [ 9.300053] [<c03cd144>] (setup_received_irq+0xbc/0x270) from [<c03cda64>] (tegra_udc_irq+0x2ac/0x2c4) [ 9.309353] [<c03cda64>] (tegra_udc_irq+0x2ac/0x2c4) from [<c00b5708>] (handle_irq_event_percpu+0x78/0x2e0) [ 9.319087] [<c00b5708>] (handle_irq_event_percpu+0x78/0x2e0) from [<c00b59b4>] (handle_irq_event+0x44/0x64) [ 9.328907] [<c00b59b4>] (handle_irq_event+0x44/0x64) from [<c00b8688>] (handle_fasteoi_irq+0xc4/0x16c) [ 9.338294] [<c00b8688>] (handle_fasteoi_irq+0xc4/0x16c) from [<c00b4f14>] (generic_handle_irq+0x34/0x48) [ 9.347858] [<c00b4f14>] (generic_handle_irq+0x34/0x48) from [<c000f6f4>] (handle_IRQ+0x54/0xb4) [ 9.356637] [<c000f6f4>] (handle_IRQ+0x54/0xb4) from [<c00084b0>] (gic_handle_irq+0x2c/0x60) [ 9.365068] [<c00084b0>] (gic_handle_irq+0x2c/0x60) from [<c000e900>] (__irq_svc+0x40/0x70) [ 9.373405] Exception stack(0xc09edf10 to 0xc09edf58) [ 9.378447] df00: 00000000 000f4240 00000003 00000000 [ 9.386615] df20: 00000000 e55bbc00 ef66f3ca 00000001 00000000 412fc099 c0abb9c8 00000000 [ 9.394781] df40: 3b9ac9ff c09edf58 c027a9bc c0042880 20000113 ffffffff [ 9.401396] [<c000e900>] (__irq_svc+0x40/0x70) from [<c0042880>] (tegra_idle_enter_lp3+0x68/0x78) [ 9.410272] [<c0042880>] (tegra_idle_enter_lp3+0x68/0x78) from [<c04701d4>] (cpuidle_idle_call+0xdc/0x3a4) [ 9.419922] [<c04701d4>] (cpuidle_idle_call+0xdc/0x3a4) from [<c000fdd8>] (cpu_idle+0xd8/0x134) [ 9.428612] [<c000fdd8>] (cpu_idle+0xd8/0x134) from [<c0986818>] (start_kernel+0x27c/0x2cc) [ 9.436952] Code: e1a00004 e3a04000 eb002265 eaffffe0 (e7f001f2) [ 9.443038] ---[ end trace 1b75b31a2719ed24 ]--- [ 9.447645] Kernel panic - not syncing: Fatal exception in interrupt Hiroshi Doyu (4): ARM: dma-mapping: atomic_pool with struct page **pages ARM: dma-mapping: Refactor out to introduce __in_atomic_pool ARM: dma-mapping: Introduce __atomic_get_pages() for __iommu_get_pages() ARM: dma-mapping: IOMMU allocates pages from atomic_pool with GFP_ATOMIC arch/arm/mm/dma-mapping.c | 90 ++++++++++++++++++++++++++++++++++++++++----- 1 files changed, 80 insertions(+), 10 deletions(-) -- 1.7.5.4

13 years

[RFC 0/4] ARM: dma-mapping: IOMMU atomic allocation

by Hiroshi Doyu

Hi, The commit e9da6e9 "ARM: dma-mapping: remove custom consistent dma region" breaks the compatibility with existing drivers. This causes the following kernel oops(*1). That driver has called dma_pool_alloc() to allocate memory from the interrupt context, and it hits BUG_ON(in_interrpt()) in "get_vm_area_caller()". This patch seris fixes this problem with making use of the pre-allocate atomic memory pool which DMA is using in the same way as DMA does now. Any comment would be really appreciated. *1: [ 8.321343] ------------[ cut here ]------------ [ 8.325971] kernel BUG at /home/hdoyu/mydroid-k340-cardhu/kernel/mm/vmalloc.c:1322! [ 8.333615] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM [ 8.339436] Modules linked in: [ 8.342496] CPU: 0 Tainted: G W (3.4.6-00067-g5d485f7 #67) [ 8.349192] PC is at __get_vm_area_node.isra.29+0x164/0x16c [ 8.354758] LR is at get_vm_area_caller+0x4c/0x54 [ 8.359454] pc : [<c011297c>] lr : [<c011318c>] psr: 20000193 [ 8.359458] sp : c09edca0 ip : c09ec000 fp : ae278000 [ 8.370922] r10: f0000000 r9 : c011aa54 r8 : c0a26cb8 [ 8.376136] r7 : 00000001 r6 : 000000d0 r5 : 20000008 r4 : c09edca0 [ 8.382651] r3 : 00010000 r2 : 20000008 r1 : 00000001 r0 : 00001000 [ 8.389166] Flags: nzCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment kernel [ 8.396549] Control: 10c5387d Table: ad98c04a DAC: 00000015 .... [ 9.169162] dfa0: 412fc099 c09ec000 00000000 c000fdd8 c06df1e4 c0a1b080 00000000 00000000 [ 9.177329] dfc0: c0a235cc 8000406a 00000000 c0986818 ffffffff ffffffff c0986404 00000000 [ 9.185497] dfe0: 00000000 c09bb070 10c5387d c0a19c58 c09bb064 80008044 00000000 00000000 [ 9.193673] [<c011297c>] (__get_vm_area_node.isra.29+0x164/0x16c) from [<c011318c>] (get_vm_area_caller+0x4c/0x54) [ 9.204022] [<c011318c>] (get_vm_area_caller+0x4c/0x54) from [<c001aed8>] (__iommu_alloc_remap.isra.14+0x2c/0xfc) [ 9.214276] [<c001aed8>] (__iommu_alloc_remap.isra.14+0x2c/0xfc) from [<c001b06c>] (arm_iommu_alloc_attrs+0xc4/0xf8) [ 9.224795] [<c001b06c>] (arm_iommu_alloc_attrs+0xc4/0xf8) from [<c011aa54>] (pool_alloc_page.constprop.5+0x6c/0xf8) [ 9.235309] [<c011aa54>] (pool_alloc_page.constprop.5+0x6c/0xf8) from [<c011ab60>] (dma_pool_alloc+0x80/0x170) [ 9.245304] [<c011ab60>] (dma_pool_alloc+0x80/0x170) from [<c03cbbcc>] (tegra_build_dtd+0x48/0x14c) [ 9.254344] [<c03cbbcc>] (tegra_build_dtd+0x48/0x14c) from [<c03cbd4c>] (tegra_req_to_dtd+0x7c/0xa8) [ 9.263467] [<c03cbd4c>] (tegra_req_to_dtd+0x7c/0xa8) from [<c03cc140>] (tegra_ep_queue+0x154/0x33c) [ 9.272592] [<c03cc140>] (tegra_ep_queue+0x154/0x33c) from [<c03dd5b4>] (composite_setup+0x364/0x6d4) [ 9.281804] [<c03dd5b4>] (composite_setup+0x364/0x6d4) from [<c03dd9dc>] (android_setup+0xb8/0x14c) [ 9.290843] [<c03dd9dc>] (android_setup+0xb8/0x14c) from [<c03cd144>] (setup_received_irq+0xbc/0x270) [ 9.300053] [<c03cd144>] (setup_received_irq+0xbc/0x270) from [<c03cda64>] (tegra_udc_irq+0x2ac/0x2c4) [ 9.309353] [<c03cda64>] (tegra_udc_irq+0x2ac/0x2c4) from [<c00b5708>] (handle_irq_event_percpu+0x78/0x2e0) [ 9.319087] [<c00b5708>] (handle_irq_event_percpu+0x78/0x2e0) from [<c00b59b4>] (handle_irq_event+0x44/0x64) [ 9.328907] [<c00b59b4>] (handle_irq_event+0x44/0x64) from [<c00b8688>] (handle_fasteoi_irq+0xc4/0x16c) [ 9.338294] [<c00b8688>] (handle_fasteoi_irq+0xc4/0x16c) from [<c00b4f14>] (generic_handle_irq+0x34/0x48) [ 9.347858] [<c00b4f14>] (generic_handle_irq+0x34/0x48) from [<c000f6f4>] (handle_IRQ+0x54/0xb4) [ 9.356637] [<c000f6f4>] (handle_IRQ+0x54/0xb4) from [<c00084b0>] (gic_handle_irq+0x2c/0x60) [ 9.365068] [<c00084b0>] (gic_handle_irq+0x2c/0x60) from [<c000e900>] (__irq_svc+0x40/0x70) [ 9.373405] Exception stack(0xc09edf10 to 0xc09edf58) [ 9.378447] df00: 00000000 000f4240 00000003 00000000 [ 9.386615] df20: 00000000 e55bbc00 ef66f3ca 00000001 00000000 412fc099 c0abb9c8 00000000 [ 9.394781] df40: 3b9ac9ff c09edf58 c027a9bc c0042880 20000113 ffffffff [ 9.401396] [<c000e900>] (__irq_svc+0x40/0x70) from [<c0042880>] (tegra_idle_enter_lp3+0x68/0x78) [ 9.410272] [<c0042880>] (tegra_idle_enter_lp3+0x68/0x78) from [<c04701d4>] (cpuidle_idle_call+0xdc/0x3a4) [ 9.419922] [<c04701d4>] (cpuidle_idle_call+0xdc/0x3a4) from [<c000fdd8>] (cpu_idle+0xd8/0x134) [ 9.428612] [<c000fdd8>] (cpu_idle+0xd8/0x134) from [<c0986818>] (start_kernel+0x27c/0x2cc) [ 9.436952] Code: e1a00004 e3a04000 eb002265 eaffffe0 (e7f001f2) [ 9.443038] ---[ end trace 1b75b31a2719ed24 ]--- [ 9.447645] Kernel panic - not syncing: Fatal exception in interrupt Hiroshi Doyu (4): ARM: dma-mapping: Refactor out to introduce __alloc_fill_pages ARM: dma-mapping: IOMMU allocates pages from pool with GFP_ATOMIC ARM: dma-mapping: Return cpu addr when dma_alloc(GFP_ATOMIC) ARM: dma-mapping: dma_{alloc,free}_coherent with empty attrs arch/arm/include/asm/dma-mapping.h | 21 ++++++++++-- arch/arm/mm/dma-mapping.c | 59 ++++++++++++++++++++++++++++-------- 2 files changed, 63 insertions(+), 17 deletions(-) -- 1.7.5.4

13 years

[v2 0/4] ARM: dma-mapping: IOMMU atomic allocation

by Hiroshi Doyu

Hi, The commit e9da6e9 "ARM: dma-mapping: remove custom consistent dma region" breaks the compatibility with existing drivers. This causes the following kernel oops(*1). That driver has called dma_pool_alloc() to allocate memory from the interrupt context, and it hits BUG_ON(in_interrpt()) in "get_vm_area_caller()". This patch seris fixes this problem with making use of the pre-allocate atomic memory pool which DMA is using in the same way as DMA does now. Any comment would be really appreciated. v2: Don't modify attrs(DMA_ATTR_NO_KERNEL_MAPPING) for atomic allocation. (Marek) Skip vzalloc (KyongHo, Minchan) v1: http://lists.linaro.org/pipermail/linaro-mm-sig/2012-August/002398.html *1: [ 8.321343] ------------[ cut here ]------------ [ 8.325971] kernel BUG at kernel/mm/vmalloc.c:1322! [ 8.333615] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM [ 8.339436] Modules linked in: [ 8.342496] CPU: 0 Tainted: G W (3.4.6-00067-g5d485f7 #67) [ 8.349192] PC is at __get_vm_area_node.isra.29+0x164/0x16c [ 8.354758] LR is at get_vm_area_caller+0x4c/0x54 [ 8.359454] pc : [<c011297c>] lr : [<c011318c>] psr: 20000193 [ 8.359458] sp : c09edca0 ip : c09ec000 fp : ae278000 [ 8.370922] r10: f0000000 r9 : c011aa54 r8 : c0a26cb8 [ 8.376136] r7 : 00000001 r6 : 000000d0 r5 : 20000008 r4 : c09edca0 [ 8.382651] r3 : 00010000 r2 : 20000008 r1 : 00000001 r0 : 00001000 [ 8.389166] Flags: nzCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment kernel [ 8.396549] Control: 10c5387d Table: ad98c04a DAC: 00000015 .... [ 9.169162] dfa0: 412fc099 c09ec000 00000000 c000fdd8 c06df1e4 c0a1b080 00000000 00000000 [ 9.177329] dfc0: c0a235cc 8000406a 00000000 c0986818 ffffffff ffffffff c0986404 00000000 [ 9.185497] dfe0: 00000000 c09bb070 10c5387d c0a19c58 c09bb064 80008044 00000000 00000000 [ 9.193673] [<c011297c>] (__get_vm_area_node.isra.29+0x164/0x16c) from [<c011318c>] (get_vm_area_caller+0x4c/0x54) [ 9.204022] [<c011318c>] (get_vm_area_caller+0x4c/0x54) from [<c001aed8>] (__iommu_alloc_remap.isra.14+0x2c/0xfc) [ 9.214276] [<c001aed8>] (__iommu_alloc_remap.isra.14+0x2c/0xfc) from [<c001b06c>] (arm_iommu_alloc_attrs+0xc4/0xf8) [ 9.224795] [<c001b06c>] (arm_iommu_alloc_attrs+0xc4/0xf8) from [<c011aa54>] (pool_alloc_page.constprop.5+0x6c/0xf8) [ 9.235309] [<c011aa54>] (pool_alloc_page.constprop.5+0x6c/0xf8) from [<c011ab60>] (dma_pool_alloc+0x80/0x170) [ 9.245304] [<c011ab60>] (dma_pool_alloc+0x80/0x170) from [<c03cbbcc>] (tegra_build_dtd+0x48/0x14c) [ 9.254344] [<c03cbbcc>] (tegra_build_dtd+0x48/0x14c) from [<c03cbd4c>] (tegra_req_to_dtd+0x7c/0xa8) [ 9.263467] [<c03cbd4c>] (tegra_req_to_dtd+0x7c/0xa8) from [<c03cc140>] (tegra_ep_queue+0x154/0x33c) [ 9.272592] [<c03cc140>] (tegra_ep_queue+0x154/0x33c) from [<c03dd5b4>] (composite_setup+0x364/0x6d4) [ 9.281804] [<c03dd5b4>] (composite_setup+0x364/0x6d4) from [<c03dd9dc>] (android_setup+0xb8/0x14c) [ 9.290843] [<c03dd9dc>] (android_setup+0xb8/0x14c) from [<c03cd144>] (setup_received_irq+0xbc/0x270) [ 9.300053] [<c03cd144>] (setup_received_irq+0xbc/0x270) from [<c03cda64>] (tegra_udc_irq+0x2ac/0x2c4) [ 9.309353] [<c03cda64>] (tegra_udc_irq+0x2ac/0x2c4) from [<c00b5708>] (handle_irq_event_percpu+0x78/0x2e0) [ 9.319087] [<c00b5708>] (handle_irq_event_percpu+0x78/0x2e0) from [<c00b59b4>] (handle_irq_event+0x44/0x64) [ 9.328907] [<c00b59b4>] (handle_irq_event+0x44/0x64) from [<c00b8688>] (handle_fasteoi_irq+0xc4/0x16c) [ 9.338294] [<c00b8688>] (handle_fasteoi_irq+0xc4/0x16c) from [<c00b4f14>] (generic_handle_irq+0x34/0x48) [ 9.347858] [<c00b4f14>] (generic_handle_irq+0x34/0x48) from [<c000f6f4>] (handle_IRQ+0x54/0xb4) [ 9.356637] [<c000f6f4>] (handle_IRQ+0x54/0xb4) from [<c00084b0>] (gic_handle_irq+0x2c/0x60) [ 9.365068] [<c00084b0>] (gic_handle_irq+0x2c/0x60) from [<c000e900>] (__irq_svc+0x40/0x70) [ 9.373405] Exception stack(0xc09edf10 to 0xc09edf58) [ 9.378447] df00: 00000000 000f4240 00000003 00000000 [ 9.386615] df20: 00000000 e55bbc00 ef66f3ca 00000001 00000000 412fc099 c0abb9c8 00000000 [ 9.394781] df40: 3b9ac9ff c09edf58 c027a9bc c0042880 20000113 ffffffff [ 9.401396] [<c000e900>] (__irq_svc+0x40/0x70) from [<c0042880>] (tegra_idle_enter_lp3+0x68/0x78) [ 9.410272] [<c0042880>] (tegra_idle_enter_lp3+0x68/0x78) from [<c04701d4>] (cpuidle_idle_call+0xdc/0x3a4) [ 9.419922] [<c04701d4>] (cpuidle_idle_call+0xdc/0x3a4) from [<c000fdd8>] (cpu_idle+0xd8/0x134) [ 9.428612] [<c000fdd8>] (cpu_idle+0xd8/0x134) from [<c0986818>] (start_kernel+0x27c/0x2cc) [ 9.436952] Code: e1a00004 e3a04000 eb002265 eaffffe0 (e7f001f2) [ 9.443038] ---[ end trace 1b75b31a2719ed24 ]--- [ 9.447645] Kernel panic - not syncing: Fatal exception in interrupt Hiroshi Doyu (4): ARM: dma-mapping: Refactor out to introduce __in_atomic_pool ARM: dma-mapping: Use kzalloc() with GFP_ATOMIC ARM: dma-mapping: Refactor out to introduce __alloc_fill_pages ARM: dma-mapping: IOMMU allocates pages from atomic_pool with GFP_ATOMIC arch/arm/mm/dma-mapping.c | 102 ++++++++++++++++++++++++++++++++++----------- 1 files changed, 77 insertions(+), 25 deletions(-) -- 1.7.5.4

13 years

[PATCHv6 0/2] ARM: replace custom consistent dma region with vmalloc

by Marek Szyprowski

Hello! This is yet another quick update on the patchset which replaces custom consistent dma regions usage in dma-mapping framework in favour of generic vmalloc areas created on demand for each allocation. The main purpose for this patchset is to remove 2MiB limit of dma coherent/writecombine allocations. This version addresses a few more cleanups pointed by Minchan Kim. This patch is based on vanilla v3.5 release. Best regards Marek Szyprowski Samsung Poland R&D Center Changelog: v6: - more cleanups of minor issues pointed by Minchan Kim, moved arm_dma_mmap() changes into separate patch v5: http://thread.gmane.org/gmane.linux.kernel.mm/83096 - fixed another minor issues pointed by Minchan Kim: added more comments here and there, changed pr_err() + stack_dump() to WARN(), added a fix for no-MMU systems v4: http://thread.gmane.org/gmane.linux.kernel.mm/80906 - replaced arch-independent VM_DMA flag with ARM-specific VM_ARM_DMA_CONSISTENT flag v3: http://thread.gmane.org/gmane.linux.kernel.mm/80028 - rebased onto v3.4-rc2: added support for IOMMU-aware implementation of dma-mapping calls, unified with CMA coherent dma pool - implemented changes requested by Minchan Kim: added more checks for vmarea->flags & VM_DMA, renamed some variables, removed obsole locks, squashed find_vm_area() exporting patch into the main redesign patch v2: http://thread.gmane.org/gmane.linux.kernel.mm/78563 - added support for atomic allocations (served from preallocated pool) - minor cleanup here and there - rebased onto v3.4-rc7 v1: http://thread.gmane.org/gmane.linux.kernel.mm/76703 - initial version Patch summary: Marek Szyprowski (2): mm: vmalloc: use const void * for caller argument ARM: dma-mapping: remove custom consistent dma region Documentation/kernel-parameters.txt | 2 +- arch/arm/include/asm/dma-mapping.h | 2 +- arch/arm/mm/dma-mapping.c | 486 ++++++++++++----------------------- arch/arm/mm/mm.h | 3 + include/linux/vmalloc.h | 9 +- mm/vmalloc.c | 28 ++- 6 files changed, 194 insertions(+), 336 deletions(-) -- 1.7.1.569.g6f426

13 years

[PATCH] ARM: relax conditions required for enabling Contiguous Memory Allocator

by Marek Szyprowski

Contiguous Memory Allocator requires only paging and MMU enabled not particular CPU architectures, so there is no need for strict dependency on CPU type. This enables to use CMA on some older ARM v5 systems which also might need large contiguous blocks for the multimedia processing hw modules. Reported-by: Prabhakar Lad <prabhakar.csengg(a)gmail.com> Signed-off-by: Marek Szyprowski <m.szyprowski(a)samsung.com> --- arch/arm/Kconfig | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index e91c7cd..6ef75e2 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -6,7 +6,7 @@ config ARM select HAVE_DMA_API_DEBUG select HAVE_IDE if PCI || ISA || PCMCIA select HAVE_DMA_ATTRS - select HAVE_DMA_CONTIGUOUS if (CPU_V6 || CPU_V6K || CPU_V7) + select HAVE_DMA_CONTIGUOUS if MMU select HAVE_MEMBLOCK select RTC_LIB select SYS_SUPPORTS_APM_EMULATION -- 1.7.1.569.g6f426

13 years

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