From 4c45b1a80ee9c85aee13445b85fd55541ec26d27 Mon Sep 17 00:00:00 2001 From: John Stultz Date: Thu, 9 Jan 2014 21:08:38 -0800 Subject: [PATCH] ion: Add carveout and chunk heaps to dummy driver Add support to the dummy driver for basic carveout and chunk heaps. Since we're generating these heaps at module_init, and we want this driver to be generic enough to be tested on any arch, we don't have the ability to alloc bootmem, so both of these heaps are conventionally allocated using alloc_pages(), which limits us to 4M in size. Should look into using CMA for heap allocation eventually, but this provides enough to test the basic functionality of the heaps. Cc: Colin Cross Cc: Greg KH Cc: Jesse Barker Cc: Android Kernel Team Signed-off-by: John Stultz Signed-off-by: Greg Kroah-Hartman --- .../staging/android/ion/ion_dummy_driver.c | 67 ++++++++++++++++++- 1 file changed, 66 insertions(+), 1 deletion(-) diff --git a/drivers/staging/android/ion/ion_dummy_driver.c b/drivers/staging/android/ion/ion_dummy_driver.c index 6749d29d6004..55b2002753f2 100644 --- a/drivers/staging/android/ion/ion_dummy_driver.c +++ b/drivers/staging/android/ion/ion_dummy_driver.c @@ -26,6 +26,9 @@ struct ion_device *idev; struct ion_heap **heaps; +void *carveout_ptr; +void *chunk_ptr; + struct ion_platform_heap dummy_heaps[] = { { .id = ION_HEAP_TYPE_SYSTEM, @@ -37,10 +40,24 @@ struct ion_platform_heap dummy_heaps[] = { .type = ION_HEAP_TYPE_SYSTEM_CONTIG, .name = "system contig", }, + { + .id = ION_HEAP_TYPE_CARVEOUT, + .type = ION_HEAP_TYPE_CARVEOUT, + .name = "carveout", + .size = SZ_4M, + }, + { + .id = ION_HEAP_TYPE_CHUNK, + .type = ION_HEAP_TYPE_CHUNK, + .name = "chunk", + .size = SZ_4M, + .align = SZ_16K, + .priv = (void *)(SZ_16K), + }, }; struct ion_platform_data dummy_ion_pdata = { - .nr = 2, + .nr = 4, .heaps = dummy_heaps, }; @@ -54,9 +71,36 @@ static int __init ion_dummy_init(void) if (!heaps) return PTR_ERR(heaps); + + /* Allocate a dummy carveout heap */ + carveout_ptr = alloc_pages_exact( + dummy_heaps[ION_HEAP_TYPE_CARVEOUT].size, + GFP_KERNEL); + if (carveout_ptr) + dummy_heaps[ION_HEAP_TYPE_CARVEOUT].base = + virt_to_phys(carveout_ptr); + else + pr_err("ion_dummy: Could not allocate carveout\n"); + + /* Allocate a dummy chunk heap */ + chunk_ptr = alloc_pages_exact( + dummy_heaps[ION_HEAP_TYPE_CHUNK].size, + GFP_KERNEL); + if (chunk_ptr) + dummy_heaps[ION_HEAP_TYPE_CHUNK].base = virt_to_phys(chunk_ptr); + else + pr_err("ion_dummy: Could not allocate chunk\n"); + for (i = 0; i < dummy_ion_pdata.nr; i++) { struct ion_platform_heap *heap_data = &dummy_ion_pdata.heaps[i]; + if (heap_data->type == ION_HEAP_TYPE_CARVEOUT && + !heap_data->base) + continue; + + if (heap_data->type == ION_HEAP_TYPE_CHUNK && !heap_data->base) + continue; + heaps[i] = ion_heap_create(heap_data); if (IS_ERR_OR_NULL(heaps[i])) { err = PTR_ERR(heaps[i]); @@ -72,6 +116,16 @@ err: } kfree(heaps); + if (carveout_ptr) { + free_pages_exact(carveout_ptr, + dummy_heaps[ION_HEAP_TYPE_CARVEOUT].size); + carveout_ptr = NULL; + } + if (chunk_ptr) { + free_pages_exact(chunk_ptr, + dummy_heaps[ION_HEAP_TYPE_CHUNK].size); + chunk_ptr = NULL; + } return err; } @@ -85,6 +139,17 @@ static void __exit ion_dummy_exit(void) ion_heap_destroy(heaps[i]); kfree(heaps); + if (carveout_ptr) { + free_pages_exact(carveout_ptr, + dummy_heaps[ION_HEAP_TYPE_CARVEOUT].size); + carveout_ptr = NULL; + } + if (chunk_ptr) { + free_pages_exact(chunk_ptr, + dummy_heaps[ION_HEAP_TYPE_CHUNK].size); + chunk_ptr = NULL; + } + return; }