Merge branch 'drm-ttm-pool' into drm-core-next
* drm-ttm-pool: drm/ttm: using kmalloc/kfree requires including slab.h drm/ttm: include linux/seq_file.h for seq_printf drm/ttm: Add sysfs interface to control pool allocator. drm/ttm: Use set_pages_array_wc instead of set_memory_wc. arch/x86: Add array variants for setting memory to wc caching. drm/nouveau: Add ttm page pool debugfs file. drm/radeon/kms: Add ttm page pool debugfs file. drm/ttm: Add debugfs output entry to pool allocator. drm/ttm: add pool wc/uc page allocator V3
This commit is contained in:
Dave Airlie
commit
c2b41276da
9 changed files with 1007 additions and 36 deletions
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@ -139,9 +139,11 @@ int set_memory_np(unsigned long addr, int numpages);
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int set_memory_4k(unsigned long addr, int numpages);
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int set_memory_array_uc(unsigned long *addr, int addrinarray);
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int set_memory_array_wc(unsigned long *addr, int addrinarray);
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int set_memory_array_wb(unsigned long *addr, int addrinarray);
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int set_pages_array_uc(struct page **pages, int addrinarray);
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int set_pages_array_wc(struct page **pages, int addrinarray);
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int set_pages_array_wb(struct page **pages, int addrinarray);
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/*
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@ -997,7 +997,8 @@ int set_memory_uc(unsigned long addr, int numpages)
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}
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EXPORT_SYMBOL(set_memory_uc);
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int set_memory_array_uc(unsigned long *addr, int addrinarray)
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int _set_memory_array(unsigned long *addr, int addrinarray,
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unsigned long new_type)
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{
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int i, j;
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int ret;
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@ -1007,13 +1008,19 @@ int set_memory_array_uc(unsigned long *addr, int addrinarray)
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*/
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for (i = 0; i < addrinarray; i++) {
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ret = reserve_memtype(__pa(addr[i]), __pa(addr[i]) + PAGE_SIZE,
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_PAGE_CACHE_UC_MINUS, NULL);
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new_type, NULL);
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if (ret)
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goto out_free;
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}
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ret = change_page_attr_set(addr, addrinarray,
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__pgprot(_PAGE_CACHE_UC_MINUS), 1);
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if (!ret && new_type == _PAGE_CACHE_WC)
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ret = change_page_attr_set_clr(addr, addrinarray,
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__pgprot(_PAGE_CACHE_WC),
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__pgprot(_PAGE_CACHE_MASK),
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0, CPA_ARRAY, NULL);
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if (ret)
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goto out_free;
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@ -1025,8 +1032,19 @@ int set_memory_array_uc(unsigned long *addr, int addrinarray)
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return ret;
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}
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int set_memory_array_uc(unsigned long *addr, int addrinarray)
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{
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return _set_memory_array(addr, addrinarray, _PAGE_CACHE_UC_MINUS);
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}
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EXPORT_SYMBOL(set_memory_array_uc);
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int set_memory_array_wc(unsigned long *addr, int addrinarray)
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{
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return _set_memory_array(addr, addrinarray, _PAGE_CACHE_WC);
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}
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EXPORT_SYMBOL(set_memory_array_wc);
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int _set_memory_wc(unsigned long addr, int numpages)
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{
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int ret;
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@ -1153,26 +1171,34 @@ int set_pages_uc(struct page *page, int numpages)
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}
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EXPORT_SYMBOL(set_pages_uc);
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int set_pages_array_uc(struct page **pages, int addrinarray)
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static int _set_pages_array(struct page **pages, int addrinarray,
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unsigned long new_type)
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{
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unsigned long start;
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unsigned long end;
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int i;
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int free_idx;
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int ret;
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for (i = 0; i < addrinarray; i++) {
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if (PageHighMem(pages[i]))
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continue;
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start = page_to_pfn(pages[i]) << PAGE_SHIFT;
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end = start + PAGE_SIZE;
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if (reserve_memtype(start, end, _PAGE_CACHE_UC_MINUS, NULL))
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if (reserve_memtype(start, end, new_type, NULL))
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goto err_out;
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}
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if (cpa_set_pages_array(pages, addrinarray,
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__pgprot(_PAGE_CACHE_UC_MINUS)) == 0) {
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return 0; /* Success */
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}
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ret = cpa_set_pages_array(pages, addrinarray,
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__pgprot(_PAGE_CACHE_UC_MINUS));
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if (!ret && new_type == _PAGE_CACHE_WC)
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ret = change_page_attr_set_clr(NULL, addrinarray,
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__pgprot(_PAGE_CACHE_WC),
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__pgprot(_PAGE_CACHE_MASK),
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0, CPA_PAGES_ARRAY, pages);
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if (ret)
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goto err_out;
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return 0; /* Success */
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err_out:
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free_idx = i;
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for (i = 0; i < free_idx; i++) {
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@ -1184,8 +1210,19 @@ int set_pages_array_uc(struct page **pages, int addrinarray)
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}
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return -EINVAL;
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}
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int set_pages_array_uc(struct page **pages, int addrinarray)
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{
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return _set_pages_array(pages, addrinarray, _PAGE_CACHE_UC_MINUS);
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}
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EXPORT_SYMBOL(set_pages_array_uc);
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int set_pages_array_wc(struct page **pages, int addrinarray)
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{
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return _set_pages_array(pages, addrinarray, _PAGE_CACHE_WC);
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}
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EXPORT_SYMBOL(set_pages_array_wc);
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int set_pages_wb(struct page *page, int numpages)
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{
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unsigned long addr = (unsigned long)page_address(page);
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@ -33,6 +33,8 @@
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#include "drmP.h"
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#include "nouveau_drv.h"
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#include <ttm/ttm_page_alloc.h>
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static int
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nouveau_debugfs_channel_info(struct seq_file *m, void *data)
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{
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@ -159,6 +161,7 @@ static struct drm_info_list nouveau_debugfs_list[] = {
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{ "chipset", nouveau_debugfs_chipset_info, 0, NULL },
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{ "memory", nouveau_debugfs_memory_info, 0, NULL },
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{ "vbios.rom", nouveau_debugfs_vbios_image, 0, NULL },
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{ "ttm_page_pool", ttm_page_alloc_debugfs, 0, NULL },
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};
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#define NOUVEAU_DEBUGFS_ENTRIES ARRAY_SIZE(nouveau_debugfs_list)
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@ -33,6 +33,7 @@
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#include <ttm/ttm_bo_driver.h>
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#include <ttm/ttm_placement.h>
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#include <ttm/ttm_module.h>
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#include <ttm/ttm_page_alloc.h>
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#include <drm/drmP.h>
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#include <drm/radeon_drm.h>
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#include <linux/seq_file.h>
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@ -745,8 +746,8 @@ static int radeon_mm_dump_table(struct seq_file *m, void *data)
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static int radeon_ttm_debugfs_init(struct radeon_device *rdev)
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{
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#if defined(CONFIG_DEBUG_FS)
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static struct drm_info_list radeon_mem_types_list[RADEON_DEBUGFS_MEM_TYPES];
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static char radeon_mem_types_names[RADEON_DEBUGFS_MEM_TYPES][32];
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static struct drm_info_list radeon_mem_types_list[RADEON_DEBUGFS_MEM_TYPES+1];
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static char radeon_mem_types_names[RADEON_DEBUGFS_MEM_TYPES+1][32];
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unsigned i;
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for (i = 0; i < RADEON_DEBUGFS_MEM_TYPES; i++) {
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@ -763,7 +764,13 @@ static int radeon_ttm_debugfs_init(struct radeon_device *rdev)
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radeon_mem_types_list[i].data = &rdev->mman.bdev.man[TTM_PL_TT].manager;
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}
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return radeon_debugfs_add_files(rdev, radeon_mem_types_list, RADEON_DEBUGFS_MEM_TYPES);
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/* Add ttm page pool to debugfs */
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sprintf(radeon_mem_types_names[i], "ttm_page_pool");
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radeon_mem_types_list[i].name = radeon_mem_types_names[i];
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radeon_mem_types_list[i].show = &ttm_page_alloc_debugfs;
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radeon_mem_types_list[i].driver_features = 0;
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radeon_mem_types_list[i].data = NULL;
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return radeon_debugfs_add_files(rdev, radeon_mem_types_list, RADEON_DEBUGFS_MEM_TYPES+1);
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#endif
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return 0;
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@ -4,6 +4,6 @@
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ccflags-y := -Iinclude/drm
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ttm-y := ttm_agp_backend.o ttm_memory.o ttm_tt.o ttm_bo.o \
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ttm_bo_util.o ttm_bo_vm.o ttm_module.o ttm_global.o \
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ttm_object.o ttm_lock.o ttm_execbuf_util.o
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ttm_object.o ttm_lock.o ttm_execbuf_util.o ttm_page_alloc.o
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obj-$(CONFIG_DRM_TTM) += ttm.o
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@ -27,6 +27,7 @@
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#include "ttm/ttm_memory.h"
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#include "ttm/ttm_module.h"
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#include "ttm/ttm_page_alloc.h"
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#include <linux/spinlock.h>
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#include <linux/sched.h>
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#include <linux/wait.h>
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@ -393,6 +394,7 @@ int ttm_mem_global_init(struct ttm_mem_global *glob)
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"Zone %7s: Available graphics memory: %llu kiB.\n",
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zone->name, (unsigned long long) zone->max_mem >> 10);
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}
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ttm_page_alloc_init(glob, glob->zone_kernel->max_mem/(2*PAGE_SIZE));
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return 0;
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out_no_zone:
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ttm_mem_global_release(glob);
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@ -405,6 +407,9 @@ void ttm_mem_global_release(struct ttm_mem_global *glob)
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unsigned int i;
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struct ttm_mem_zone *zone;
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/* let the page allocator first stop the shrink work. */
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ttm_page_alloc_fini();
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flush_workqueue(glob->swap_queue);
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destroy_workqueue(glob->swap_queue);
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glob->swap_queue = NULL;
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@ -412,7 +417,7 @@ void ttm_mem_global_release(struct ttm_mem_global *glob)
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zone = glob->zones[i];
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kobject_del(&zone->kobj);
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kobject_put(&zone->kobj);
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}
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}
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kobject_del(&glob->kobj);
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kobject_put(&glob->kobj);
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}
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845
drivers/gpu/drm/ttm/ttm_page_alloc.c
Normal file
845
drivers/gpu/drm/ttm/ttm_page_alloc.c
Normal file
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@ -0,0 +1,845 @@
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/*
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* Copyright (c) Red Hat Inc.
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sub license,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
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* DEALINGS IN THE SOFTWARE.
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*
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* Authors: Dave Airlie <airlied@redhat.com>
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* Jerome Glisse <jglisse@redhat.com>
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* Pauli Nieminen <suokkos@gmail.com>
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*/
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/* simple list based uncached page pool
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* - Pool collects resently freed pages for reuse
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* - Use page->lru to keep a free list
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* - doesn't track currently in use pages
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*/
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#include <linux/list.h>
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#include <linux/spinlock.h>
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#include <linux/highmem.h>
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#include <linux/mm_types.h>
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/seq_file.h> /* for seq_printf */
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#include <linux/slab.h>
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#include <asm/atomic.h>
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#include <asm/agp.h>
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#include "ttm/ttm_bo_driver.h"
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#include "ttm/ttm_page_alloc.h"
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#define NUM_PAGES_TO_ALLOC (PAGE_SIZE/sizeof(struct page *))
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#define SMALL_ALLOCATION 16
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#define FREE_ALL_PAGES (~0U)
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/* times are in msecs */
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#define PAGE_FREE_INTERVAL 1000
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/**
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* struct ttm_page_pool - Pool to reuse recently allocated uc/wc pages.
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*
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* @lock: Protects the shared pool from concurrnet access. Must be used with
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* irqsave/irqrestore variants because pool allocator maybe called from
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* delayed work.
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* @fill_lock: Prevent concurrent calls to fill.
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* @list: Pool of free uc/wc pages for fast reuse.
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* @gfp_flags: Flags to pass for alloc_page.
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* @npages: Number of pages in pool.
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*/
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struct ttm_page_pool {
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spinlock_t lock;
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bool fill_lock;
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struct list_head list;
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int gfp_flags;
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unsigned npages;
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char *name;
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unsigned long nfrees;
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unsigned long nrefills;
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};
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|
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/**
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* Limits for the pool. They are handled without locks because only place where
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* they may change is in sysfs store. They won't have immediate effect anyway
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* so forcing serialiazation to access them is pointless.
|
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*/
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||||
|
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struct ttm_pool_opts {
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unsigned alloc_size;
|
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unsigned max_size;
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unsigned small;
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};
|
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|
||||
#define NUM_POOLS 4
|
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|
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/**
|
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* struct ttm_pool_manager - Holds memory pools for fst allocation
|
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*
|
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* Manager is read only object for pool code so it doesn't need locking.
|
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*
|
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* @free_interval: minimum number of jiffies between freeing pages from pool.
|
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* @page_alloc_inited: reference counting for pool allocation.
|
||||
* @work: Work that is used to shrink the pool. Work is only run when there is
|
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* some pages to free.
|
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* @small_allocation: Limit in number of pages what is small allocation.
|
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*
|
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* @pools: All pool objects in use.
|
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**/
|
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struct ttm_pool_manager {
|
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struct kobject kobj;
|
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struct shrinker mm_shrink;
|
||||
atomic_t page_alloc_inited;
|
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struct ttm_pool_opts options;
|
||||
|
||||
union {
|
||||
struct ttm_page_pool pools[NUM_POOLS];
|
||||
struct {
|
||||
struct ttm_page_pool wc_pool;
|
||||
struct ttm_page_pool uc_pool;
|
||||
struct ttm_page_pool wc_pool_dma32;
|
||||
struct ttm_page_pool uc_pool_dma32;
|
||||
} ;
|
||||
};
|
||||
};
|
||||
|
||||
static struct attribute ttm_page_pool_max = {
|
||||
.name = "pool_max_size",
|
||||
.mode = S_IRUGO | S_IWUSR
|
||||
};
|
||||
static struct attribute ttm_page_pool_small = {
|
||||
.name = "pool_small_allocation",
|
||||
.mode = S_IRUGO | S_IWUSR
|
||||
};
|
||||
static struct attribute ttm_page_pool_alloc_size = {
|
||||
.name = "pool_allocation_size",
|
||||
.mode = S_IRUGO | S_IWUSR
|
||||
};
|
||||
|
||||
static struct attribute *ttm_pool_attrs[] = {
|
||||
&ttm_page_pool_max,
|
||||
&ttm_page_pool_small,
|
||||
&ttm_page_pool_alloc_size,
|
||||
NULL
|
||||
};
|
||||
|
||||
static void ttm_pool_kobj_release(struct kobject *kobj)
|
||||
{
|
||||
struct ttm_pool_manager *m =
|
||||
container_of(kobj, struct ttm_pool_manager, kobj);
|
||||
(void)m;
|
||||
}
|
||||
|
||||
static ssize_t ttm_pool_store(struct kobject *kobj,
|
||||
struct attribute *attr, const char *buffer, size_t size)
|
||||
{
|
||||
struct ttm_pool_manager *m =
|
||||
container_of(kobj, struct ttm_pool_manager, kobj);
|
||||
int chars;
|
||||
unsigned val;
|
||||
chars = sscanf(buffer, "%u", &val);
|
||||
if (chars == 0)
|
||||
return size;
|
||||
|
||||
/* Convert kb to number of pages */
|
||||
val = val / (PAGE_SIZE >> 10);
|
||||
|
||||
if (attr == &ttm_page_pool_max)
|
||||
m->options.max_size = val;
|
||||
else if (attr == &ttm_page_pool_small)
|
||||
m->options.small = val;
|
||||
else if (attr == &ttm_page_pool_alloc_size) {
|
||||
if (val > NUM_PAGES_TO_ALLOC*8) {
|
||||
printk(KERN_ERR "[ttm] Setting allocation size to %lu "
|
||||
"is not allowed. Recomended size is "
|
||||
"%lu\n",
|
||||
NUM_PAGES_TO_ALLOC*(PAGE_SIZE >> 7),
|
||||
NUM_PAGES_TO_ALLOC*(PAGE_SIZE >> 10));
|
||||
return size;
|
||||
} else if (val > NUM_PAGES_TO_ALLOC) {
|
||||
printk(KERN_WARNING "[ttm] Setting allocation size to "
|
||||
"larger than %lu is not recomended.\n",
|
||||
NUM_PAGES_TO_ALLOC*(PAGE_SIZE >> 10));
|
||||
}
|
||||
m->options.alloc_size = val;
|
||||
}
|
||||
|
||||
return size;
|
||||
}
|
||||
|
||||
static ssize_t ttm_pool_show(struct kobject *kobj,
|
||||
struct attribute *attr, char *buffer)
|
||||
{
|
||||
struct ttm_pool_manager *m =
|
||||
container_of(kobj, struct ttm_pool_manager, kobj);
|
||||
unsigned val = 0;
|
||||
|
||||
if (attr == &ttm_page_pool_max)
|
||||
val = m->options.max_size;
|
||||
else if (attr == &ttm_page_pool_small)
|
||||
val = m->options.small;
|
||||
else if (attr == &ttm_page_pool_alloc_size)
|
||||
val = m->options.alloc_size;
|
||||
|
||||
val = val * (PAGE_SIZE >> 10);
|
||||
|
||||
return snprintf(buffer, PAGE_SIZE, "%u\n", val);
|
||||
}
|
||||
|
||||
static const struct sysfs_ops ttm_pool_sysfs_ops = {
|
||||
.show = &ttm_pool_show,
|
||||
.store = &ttm_pool_store,
|
||||
};
|
||||
|
||||
static struct kobj_type ttm_pool_kobj_type = {
|
||||
.release = &ttm_pool_kobj_release,
|
||||
.sysfs_ops = &ttm_pool_sysfs_ops,
|
||||
.default_attrs = ttm_pool_attrs,
|
||||
};
|
||||
|
||||
static struct ttm_pool_manager _manager = {
|
||||
.page_alloc_inited = ATOMIC_INIT(0)
|
||||
};
|
||||
|
||||
#ifndef CONFIG_X86
|
||||
static int set_pages_array_wb(struct page **pages, int addrinarray)
|
||||
{
|
||||
#ifdef TTM_HAS_AGP
|
||||
int i;
|
||||
|
||||
for (i = 0; i < addrinarray; i++)
|
||||
unmap_page_from_agp(pages[i]);
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int set_pages_array_wc(struct page **pages, int addrinarray)
|
||||
{
|
||||
#ifdef TTM_HAS_AGP
|
||||
int i;
|
||||
|
||||
for (i = 0; i < addrinarray; i++)
|
||||
map_page_into_agp(pages[i]);
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int set_pages_array_uc(struct page **pages, int addrinarray)
|
||||
{
|
||||
#ifdef TTM_HAS_AGP
|
||||
int i;
|
||||
|
||||
for (i = 0; i < addrinarray; i++)
|
||||
map_page_into_agp(pages[i]);
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
/**
|
||||
* Select the right pool or requested caching state and ttm flags. */
|
||||
static struct ttm_page_pool *ttm_get_pool(int flags,
|
||||
enum ttm_caching_state cstate)
|
||||
{
|
||||
int pool_index;
|
||||
|
||||
if (cstate == tt_cached)
|
||||
return NULL;
|
||||
|
||||
if (cstate == tt_wc)
|
||||
pool_index = 0x0;
|
||||
else
|
||||
pool_index = 0x1;
|
||||
|
||||
if (flags & TTM_PAGE_FLAG_DMA32)
|
||||
pool_index |= 0x2;
|
||||
|
||||
return &_manager.pools[pool_index];
|
||||
}
|
||||
|
||||
/* set memory back to wb and free the pages. */
|
||||
static void ttm_pages_put(struct page *pages[], unsigned npages)
|
||||
{
|
||||
unsigned i;
|
||||
if (set_pages_array_wb(pages, npages))
|
||||
printk(KERN_ERR "[ttm] Failed to set %d pages to wb!\n",
|
||||
npages);
|
||||
for (i = 0; i < npages; ++i)
|
||||
__free_page(pages[i]);
|
||||
}
|
||||
|
||||
static void ttm_pool_update_free_locked(struct ttm_page_pool *pool,
|
||||
unsigned freed_pages)
|
||||
{
|
||||
pool->npages -= freed_pages;
|
||||
pool->nfrees += freed_pages;
|
||||
}
|
||||
|
||||
/**
|
||||
* Free pages from pool.
|
||||
*
|
||||
* To prevent hogging the ttm_swap process we only free NUM_PAGES_TO_ALLOC
|
||||
* number of pages in one go.
|
||||
*
|
||||
* @pool: to free the pages from
|
||||
* @free_all: If set to true will free all pages in pool
|
||||
**/
|
||||
static int ttm_page_pool_free(struct ttm_page_pool *pool, unsigned nr_free)
|
||||
{
|
||||
unsigned long irq_flags;
|
||||
struct page *p;
|
||||
struct page **pages_to_free;
|
||||
unsigned freed_pages = 0,
|
||||
npages_to_free = nr_free;
|
||||
|
||||
if (NUM_PAGES_TO_ALLOC < nr_free)
|
||||
npages_to_free = NUM_PAGES_TO_ALLOC;
|
||||
|
||||
pages_to_free = kmalloc(npages_to_free * sizeof(struct page *),
|
||||
GFP_KERNEL);
|
||||
if (!pages_to_free) {
|
||||
printk(KERN_ERR "Failed to allocate memory for pool free operation.\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
restart:
|
||||
spin_lock_irqsave(&pool->lock, irq_flags);
|
||||
|
||||
list_for_each_entry_reverse(p, &pool->list, lru) {
|
||||
if (freed_pages >= npages_to_free)
|
||||
break;
|
||||
|
||||
pages_to_free[freed_pages++] = p;
|
||||
/* We can only remove NUM_PAGES_TO_ALLOC at a time. */
|
||||
if (freed_pages >= NUM_PAGES_TO_ALLOC) {
|
||||
/* remove range of pages from the pool */
|
||||
__list_del(p->lru.prev, &pool->list);
|
||||
|
||||
ttm_pool_update_free_locked(pool, freed_pages);
|
||||
/**
|
||||
* Because changing page caching is costly
|
||||
* we unlock the pool to prevent stalling.
|
||||
*/
|
||||
spin_unlock_irqrestore(&pool->lock, irq_flags);
|
||||
|
||||
ttm_pages_put(pages_to_free, freed_pages);
|
||||
if (likely(nr_free != FREE_ALL_PAGES))
|
||||
nr_free -= freed_pages;
|
||||
|
||||
if (NUM_PAGES_TO_ALLOC >= nr_free)
|
||||
npages_to_free = nr_free;
|
||||
else
|
||||
npages_to_free = NUM_PAGES_TO_ALLOC;
|
||||
|
||||
freed_pages = 0;
|
||||
|
||||
/* free all so restart the processing */
|
||||
if (nr_free)
|
||||
goto restart;
|
||||
|
||||
/* Not allowed to fall tough or break because
|
||||
* following context is inside spinlock while we are
|
||||
* outside here.
|
||||
*/
|
||||
goto out;
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
/* remove range of pages from the pool */
|
||||
if (freed_pages) {
|
||||
__list_del(&p->lru, &pool->list);
|
||||
|
||||
ttm_pool_update_free_locked(pool, freed_pages);
|
||||
nr_free -= freed_pages;
|
||||
}
|
||||
|
||||
spin_unlock_irqrestore(&pool->lock, irq_flags);
|
||||
|
||||
if (freed_pages)
|
||||
ttm_pages_put(pages_to_free, freed_pages);
|
||||
out:
|
||||
kfree(pages_to_free);
|
||||
return nr_free;
|
||||
}
|
||||
|
||||
/* Get good estimation how many pages are free in pools */
|
||||
static int ttm_pool_get_num_unused_pages(void)
|
||||
{
|
||||
unsigned i;
|
||||
int total = 0;
|
||||
for (i = 0; i < NUM_POOLS; ++i)
|
||||
total += _manager.pools[i].npages;
|
||||
|
||||
return total;
|
||||
}
|
||||
|
||||
/**
|
||||
* Calback for mm to request pool to reduce number of page held.
|
||||
*/
|
||||
static int ttm_pool_mm_shrink(int shrink_pages, gfp_t gfp_mask)
|
||||
{
|
||||
static atomic_t start_pool = ATOMIC_INIT(0);
|
||||
unsigned i;
|
||||
unsigned pool_offset = atomic_add_return(1, &start_pool);
|
||||
struct ttm_page_pool *pool;
|
||||
|
||||
pool_offset = pool_offset % NUM_POOLS;
|
||||
/* select start pool in round robin fashion */
|
||||
for (i = 0; i < NUM_POOLS; ++i) {
|
||||
unsigned nr_free = shrink_pages;
|
||||
if (shrink_pages == 0)
|
||||
break;
|
||||
pool = &_manager.pools[(i + pool_offset)%NUM_POOLS];
|
||||
shrink_pages = ttm_page_pool_free(pool, nr_free);
|
||||
}
|
||||
/* return estimated number of unused pages in pool */
|
||||
return ttm_pool_get_num_unused_pages();
|
||||
}
|
||||
|
||||
static void ttm_pool_mm_shrink_init(struct ttm_pool_manager *manager)
|
||||
{
|
||||
manager->mm_shrink.shrink = &ttm_pool_mm_shrink;
|
||||
manager->mm_shrink.seeks = 1;
|
||||
register_shrinker(&manager->mm_shrink);
|
||||
}
|
||||
|
||||
static void ttm_pool_mm_shrink_fini(struct ttm_pool_manager *manager)
|
||||
{
|
||||
unregister_shrinker(&manager->mm_shrink);
|
||||
}
|
||||
|
||||
static int ttm_set_pages_caching(struct page **pages,
|
||||
enum ttm_caching_state cstate, unsigned cpages)
|
||||
{
|
||||
int r = 0;
|
||||
/* Set page caching */
|
||||
switch (cstate) {
|
||||
case tt_uncached:
|
||||
r = set_pages_array_uc(pages, cpages);
|
||||
if (r)
|
||||
printk(KERN_ERR "[ttm] Failed to set %d pages to uc!\n",
|
||||
cpages);
|
||||
break;
|
||||
case tt_wc:
|
||||
r = set_pages_array_wc(pages, cpages);
|
||||
if (r)
|
||||
printk(KERN_ERR "[ttm] Failed to set %d pages to wc!\n",
|
||||
cpages);
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
return r;
|
||||
}
|
||||
|
||||
/**
|
||||
* Free pages the pages that failed to change the caching state. If there is
|
||||
* any pages that have changed their caching state already put them to the
|
||||
* pool.
|
||||
*/
|
||||
static void ttm_handle_caching_state_failure(struct list_head *pages,
|
||||
int ttm_flags, enum ttm_caching_state cstate,
|
||||
struct page **failed_pages, unsigned cpages)
|
||||
{
|
||||
unsigned i;
|
||||
/* Failed pages has to be reed */
|
||||
for (i = 0; i < cpages; ++i) {
|
||||
list_del(&failed_pages[i]->lru);
|
||||
__free_page(failed_pages[i]);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Allocate new pages with correct caching.
|
||||
*
|
||||
* This function is reentrant if caller updates count depending on number of
|
||||
* pages returned in pages array.
|
||||
*/
|
||||
static int ttm_alloc_new_pages(struct list_head *pages, int gfp_flags,
|
||||
int ttm_flags, enum ttm_caching_state cstate, unsigned count)
|
||||
{
|
||||
struct page **caching_array;
|
||||
struct page *p;
|
||||
int r = 0;
|
||||
unsigned i, cpages;
|
||||
unsigned max_cpages = min(count,
|
||||
(unsigned)(PAGE_SIZE/sizeof(struct page *)));
|
||||
|
||||
/* allocate array for page caching change */
|
||||
caching_array = kmalloc(max_cpages*sizeof(struct page *), GFP_KERNEL);
|
||||
|
||||
if (!caching_array) {
|
||||
printk(KERN_ERR "[ttm] unable to allocate table for new pages.");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
for (i = 0, cpages = 0; i < count; ++i) {
|
||||
p = alloc_page(gfp_flags);
|
||||
|
||||
if (!p) {
|
||||
printk(KERN_ERR "[ttm] unable to get page %u\n", i);
|
||||
|
||||
/* store already allocated pages in the pool after
|
||||
* setting the caching state */
|
||||
if (cpages) {
|
||||
r = ttm_set_pages_caching(caching_array, cstate, cpages);
|
||||
if (r)
|
||||
ttm_handle_caching_state_failure(pages,
|
||||
ttm_flags, cstate,
|
||||
caching_array, cpages);
|
||||
}
|
||||
r = -ENOMEM;
|
||||
goto out;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_HIGHMEM
|
||||
/* gfp flags of highmem page should never be dma32 so we
|
||||
* we should be fine in such case
|
||||
*/
|
||||
if (!PageHighMem(p))
|
||||
#endif
|
||||
{
|
||||
caching_array[cpages++] = p;
|
||||
if (cpages == max_cpages) {
|
||||
|
||||
r = ttm_set_pages_caching(caching_array,
|
||||
cstate, cpages);
|
||||
if (r) {
|
||||
ttm_handle_caching_state_failure(pages,
|
||||
ttm_flags, cstate,
|
||||
caching_array, cpages);
|
||||
goto out;
|
||||
}
|
||||
cpages = 0;
|
||||
}
|
||||
}
|
||||
|
||||
list_add(&p->lru, pages);
|
||||
}
|
||||
|
||||
if (cpages) {
|
||||
r = ttm_set_pages_caching(caching_array, cstate, cpages);
|
||||
if (r)
|
||||
ttm_handle_caching_state_failure(pages,
|
||||
ttm_flags, cstate,
|
||||
caching_array, cpages);
|
||||
}
|
||||
out:
|
||||
kfree(caching_array);
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
/**
|
||||
* Fill the given pool if there isn't enough pages and requested number of
|
||||
* pages is small.
|
||||
*/
|
||||
static void ttm_page_pool_fill_locked(struct ttm_page_pool *pool,
|
||||
int ttm_flags, enum ttm_caching_state cstate, unsigned count,
|
||||
unsigned long *irq_flags)
|
||||
{
|
||||
struct page *p;
|
||||
int r;
|
||||
unsigned cpages = 0;
|
||||
/**
|
||||
* Only allow one pool fill operation at a time.
|
||||
* If pool doesn't have enough pages for the allocation new pages are
|
||||
* allocated from outside of pool.
|
||||
*/
|
||||
if (pool->fill_lock)
|
||||
return;
|
||||
|
||||
pool->fill_lock = true;
|
||||
|
||||
/* If allocation request is small and there is not enough
|
||||
* pages in pool we fill the pool first */
|
||||
if (count < _manager.options.small
|
||||
&& count > pool->npages) {
|
||||
struct list_head new_pages;
|
||||
unsigned alloc_size = _manager.options.alloc_size;
|
||||
|
||||
/**
|
||||
* Can't change page caching if in irqsave context. We have to
|
||||
* drop the pool->lock.
|
||||
*/
|
||||
spin_unlock_irqrestore(&pool->lock, *irq_flags);
|
||||
|
||||
INIT_LIST_HEAD(&new_pages);
|
||||
r = ttm_alloc_new_pages(&new_pages, pool->gfp_flags, ttm_flags,
|
||||
cstate, alloc_size);
|
||||
spin_lock_irqsave(&pool->lock, *irq_flags);
|
||||
|
||||
if (!r) {
|
||||
list_splice(&new_pages, &pool->list);
|
||||
++pool->nrefills;
|
||||
pool->npages += alloc_size;
|
||||
} else {
|
||||
printk(KERN_ERR "[ttm] Failed to fill pool (%p).", pool);
|
||||
/* If we have any pages left put them to the pool. */
|
||||
list_for_each_entry(p, &pool->list, lru) {
|
||||
++cpages;
|
||||
}
|
||||
list_splice(&new_pages, &pool->list);
|
||||
pool->npages += cpages;
|
||||
}
|
||||
|
||||
}
|
||||
pool->fill_lock = false;
|
||||
}
|
||||
|
||||
/**
|
||||
* Cut count nubmer of pages from the pool and put them to return list
|
||||
*
|
||||
* @return count of pages still to allocate to fill the request.
|
||||
*/
|
||||
static unsigned ttm_page_pool_get_pages(struct ttm_page_pool *pool,
|
||||
struct list_head *pages, int ttm_flags,
|
||||
enum ttm_caching_state cstate, unsigned count)
|
||||
{
|
||||
unsigned long irq_flags;
|
||||
struct list_head *p;
|
||||
unsigned i;
|
||||
|
||||
spin_lock_irqsave(&pool->lock, irq_flags);
|
||||
ttm_page_pool_fill_locked(pool, ttm_flags, cstate, count, &irq_flags);
|
||||
|
||||
if (count >= pool->npages) {
|
||||
/* take all pages from the pool */
|
||||
list_splice_init(&pool->list, pages);
|
||||
count -= pool->npages;
|
||||
pool->npages = 0;
|
||||
goto out;
|
||||
}
|
||||
/* find the last pages to include for requested number of pages. Split
|
||||
* pool to begin and halves to reduce search space. */
|
||||
if (count <= pool->npages/2) {
|
||||
i = 0;
|
||||
list_for_each(p, &pool->list) {
|
||||
if (++i == count)
|
||||
break;
|
||||
}
|
||||
} else {
|
||||
i = pool->npages + 1;
|
||||
list_for_each_prev(p, &pool->list) {
|
||||
if (--i == count)
|
||||
break;
|
||||
}
|
||||
}
|
||||
/* Cut count number of pages from pool */
|
||||
list_cut_position(pages, &pool->list, p);
|
||||
pool->npages -= count;
|
||||
count = 0;
|
||||
out:
|
||||
spin_unlock_irqrestore(&pool->lock, irq_flags);
|
||||
return count;
|
||||
}
|
||||
|
||||
/*
|
||||
* On success pages list will hold count number of correctly
|
||||
* cached pages.
|
||||
*/
|
||||
int ttm_get_pages(struct list_head *pages, int flags,
|
||||
enum ttm_caching_state cstate, unsigned count)
|
||||
{
|
||||
struct ttm_page_pool *pool = ttm_get_pool(flags, cstate);
|
||||
struct page *p = NULL;
|
||||
int gfp_flags = 0;
|
||||
int r;
|
||||
|
||||
/* set zero flag for page allocation if required */
|
||||
if (flags & TTM_PAGE_FLAG_ZERO_ALLOC)
|
||||
gfp_flags |= __GFP_ZERO;
|
||||
|
||||
/* No pool for cached pages */
|
||||
if (pool == NULL) {
|
||||
if (flags & TTM_PAGE_FLAG_DMA32)
|
||||
gfp_flags |= GFP_DMA32;
|
||||
else
|
||||
gfp_flags |= __GFP_HIGHMEM;
|
||||
|
||||
for (r = 0; r < count; ++r) {
|
||||
p = alloc_page(gfp_flags);
|
||||
if (!p) {
|
||||
|
||||
printk(KERN_ERR "[ttm] unable to allocate page.");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
list_add(&p->lru, pages);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
/* combine zero flag to pool flags */
|
||||
gfp_flags |= pool->gfp_flags;
|
||||
|
||||
/* First we take pages from the pool */
|
||||
count = ttm_page_pool_get_pages(pool, pages, flags, cstate, count);
|
||||
|
||||
/* clear the pages coming from the pool if requested */
|
||||
if (flags & TTM_PAGE_FLAG_ZERO_ALLOC) {
|
||||
list_for_each_entry(p, pages, lru) {
|
||||
clear_page(page_address(p));
|
||||
}
|
||||
}
|
||||
|
||||
/* If pool didn't have enough pages allocate new one. */
|
||||
if (count > 0) {
|
||||
/* ttm_alloc_new_pages doesn't reference pool so we can run
|
||||
* multiple requests in parallel.
|
||||
**/
|
||||
r = ttm_alloc_new_pages(pages, gfp_flags, flags, cstate, count);
|
||||
if (r) {
|
||||
/* If there is any pages in the list put them back to
|
||||
* the pool. */
|
||||
printk(KERN_ERR "[ttm] Failed to allocate extra pages "
|
||||
"for large request.");
|
||||
ttm_put_pages(pages, 0, flags, cstate);
|
||||
return r;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Put all pages in pages list to correct pool to wait for reuse */
|
||||
void ttm_put_pages(struct list_head *pages, unsigned page_count, int flags,
|
||||
enum ttm_caching_state cstate)
|
||||
{
|
||||
unsigned long irq_flags;
|
||||
struct ttm_page_pool *pool = ttm_get_pool(flags, cstate);
|
||||
struct page *p, *tmp;
|
||||
|
||||
if (pool == NULL) {
|
||||
/* No pool for this memory type so free the pages */
|
||||
|
||||
list_for_each_entry_safe(p, tmp, pages, lru) {
|
||||
__free_page(p);
|
||||
}
|
||||
/* Make the pages list empty */
|
||||
INIT_LIST_HEAD(pages);
|
||||
return;
|
||||
}
|
||||
if (page_count == 0) {
|
||||
list_for_each_entry_safe(p, tmp, pages, lru) {
|
||||
++page_count;
|
||||
}
|
||||
}
|
||||
|
||||
spin_lock_irqsave(&pool->lock, irq_flags);
|
||||
list_splice_init(pages, &pool->list);
|
||||
pool->npages += page_count;
|
||||
/* Check that we don't go over the pool limit */
|
||||
page_count = 0;
|
||||
if (pool->npages > _manager.options.max_size) {
|
||||
page_count = pool->npages - _manager.options.max_size;
|
||||
/* free at least NUM_PAGES_TO_ALLOC number of pages
|
||||
* to reduce calls to set_memory_wb */
|
||||
if (page_count < NUM_PAGES_TO_ALLOC)
|
||||
page_count = NUM_PAGES_TO_ALLOC;
|
||||
}
|
||||
spin_unlock_irqrestore(&pool->lock, irq_flags);
|
||||
if (page_count)
|
||||
ttm_page_pool_free(pool, page_count);
|
||||
}
|
||||
|
||||
static void ttm_page_pool_init_locked(struct ttm_page_pool *pool, int flags,
|
||||
char *name)
|
||||
{
|
||||
spin_lock_init(&pool->lock);
|
||||
pool->fill_lock = false;
|
||||
INIT_LIST_HEAD(&pool->list);
|
||||
pool->npages = pool->nfrees = 0;
|
||||
pool->gfp_flags = flags;
|
||||
pool->name = name;
|
||||
}
|
||||
|
||||
int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages)
|
||||
{
|
||||
int ret;
|
||||
if (atomic_add_return(1, &_manager.page_alloc_inited) > 1)
|
||||
return 0;
|
||||
|
||||
printk(KERN_INFO "[ttm] Initializing pool allocator.\n");
|
||||
|
||||
ttm_page_pool_init_locked(&_manager.wc_pool, GFP_HIGHUSER, "wc");
|
||||
|
||||
ttm_page_pool_init_locked(&_manager.uc_pool, GFP_HIGHUSER, "uc");
|
||||
|
||||
ttm_page_pool_init_locked(&_manager.wc_pool_dma32, GFP_USER | GFP_DMA32,
|
||||
"wc dma");
|
||||
|
||||
ttm_page_pool_init_locked(&_manager.uc_pool_dma32, GFP_USER | GFP_DMA32,
|
||||
"uc dma");
|
||||
|
||||
_manager.options.max_size = max_pages;
|
||||
_manager.options.small = SMALL_ALLOCATION;
|
||||
_manager.options.alloc_size = NUM_PAGES_TO_ALLOC;
|
||||
|
||||
kobject_init(&_manager.kobj, &ttm_pool_kobj_type);
|
||||
ret = kobject_add(&_manager.kobj, &glob->kobj, "pool");
|
||||
if (unlikely(ret != 0)) {
|
||||
kobject_put(&_manager.kobj);
|
||||
return ret;
|
||||
}
|
||||
|
||||
ttm_pool_mm_shrink_init(&_manager);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void ttm_page_alloc_fini()
|
||||
{
|
||||
int i;
|
||||
|
||||
if (atomic_sub_return(1, &_manager.page_alloc_inited) > 0)
|
||||
return;
|
||||
|
||||
printk(KERN_INFO "[ttm] Finilizing pool allocator.\n");
|
||||
ttm_pool_mm_shrink_fini(&_manager);
|
||||
|
||||
for (i = 0; i < NUM_POOLS; ++i)
|
||||
ttm_page_pool_free(&_manager.pools[i], FREE_ALL_PAGES);
|
||||
|
||||
kobject_put(&_manager.kobj);
|
||||
}
|
||||
|
||||
int ttm_page_alloc_debugfs(struct seq_file *m, void *data)
|
||||
{
|
||||
struct ttm_page_pool *p;
|
||||
unsigned i;
|
||||
char *h[] = {"pool", "refills", "pages freed", "size"};
|
||||
if (atomic_read(&_manager.page_alloc_inited) == 0) {
|
||||
seq_printf(m, "No pool allocator running.\n");
|
||||
return 0;
|
||||
}
|
||||
seq_printf(m, "%6s %12s %13s %8s\n",
|
||||
h[0], h[1], h[2], h[3]);
|
||||
for (i = 0; i < NUM_POOLS; ++i) {
|
||||
p = &_manager.pools[i];
|
||||
|
||||
seq_printf(m, "%6s %12ld %13ld %8d\n",
|
||||
p->name, p->nrefills,
|
||||
p->nfrees, p->npages);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(ttm_page_alloc_debugfs);
|
||||
|
|
@ -39,6 +39,7 @@
|
|||
#include "ttm/ttm_module.h"
|
||||
#include "ttm/ttm_bo_driver.h"
|
||||
#include "ttm/ttm_placement.h"
|
||||
#include "ttm/ttm_page_alloc.h"
|
||||
|
||||
static int ttm_tt_swapin(struct ttm_tt *ttm);
|
||||
|
||||
|
|
@ -56,21 +57,6 @@ static void ttm_tt_free_page_directory(struct ttm_tt *ttm)
|
|||
ttm->pages = NULL;
|
||||
}
|
||||
|
||||
static struct page *ttm_tt_alloc_page(unsigned page_flags)
|
||||
{
|
||||
gfp_t gfp_flags = GFP_USER;
|
||||
|
||||
if (page_flags & TTM_PAGE_FLAG_ZERO_ALLOC)
|
||||
gfp_flags |= __GFP_ZERO;
|
||||
|
||||
if (page_flags & TTM_PAGE_FLAG_DMA32)
|
||||
gfp_flags |= __GFP_DMA32;
|
||||
else
|
||||
gfp_flags |= __GFP_HIGHMEM;
|
||||
|
||||
return alloc_page(gfp_flags);
|
||||
}
|
||||
|
||||
static void ttm_tt_free_user_pages(struct ttm_tt *ttm)
|
||||
{
|
||||
int write;
|
||||
|
|
@ -111,15 +97,21 @@ static void ttm_tt_free_user_pages(struct ttm_tt *ttm)
|
|||
static struct page *__ttm_tt_get_page(struct ttm_tt *ttm, int index)
|
||||
{
|
||||
struct page *p;
|
||||
struct list_head h;
|
||||
struct ttm_mem_global *mem_glob = ttm->glob->mem_glob;
|
||||
int ret;
|
||||
|
||||
while (NULL == (p = ttm->pages[index])) {
|
||||
p = ttm_tt_alloc_page(ttm->page_flags);
|
||||
|
||||
if (!p)
|
||||
INIT_LIST_HEAD(&h);
|
||||
|
||||
ret = ttm_get_pages(&h, ttm->page_flags, ttm->caching_state, 1);
|
||||
|
||||
if (ret != 0)
|
||||
return NULL;
|
||||
|
||||
p = list_first_entry(&h, struct page, lru);
|
||||
|
||||
ret = ttm_mem_global_alloc_page(mem_glob, p, false, false);
|
||||
if (unlikely(ret != 0))
|
||||
goto out_err;
|
||||
|
|
@ -228,10 +220,10 @@ static int ttm_tt_set_caching(struct ttm_tt *ttm,
|
|||
if (ttm->caching_state == c_state)
|
||||
return 0;
|
||||
|
||||
if (c_state != tt_cached) {
|
||||
ret = ttm_tt_populate(ttm);
|
||||
if (unlikely(ret != 0))
|
||||
return ret;
|
||||
if (ttm->state == tt_unpopulated) {
|
||||
/* Change caching but don't populate */
|
||||
ttm->caching_state = c_state;
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (ttm->caching_state == tt_cached)
|
||||
|
|
@ -282,13 +274,17 @@ EXPORT_SYMBOL(ttm_tt_set_placement_caching);
|
|||
static void ttm_tt_free_alloced_pages(struct ttm_tt *ttm)
|
||||
{
|
||||
int i;
|
||||
unsigned count = 0;
|
||||
struct list_head h;
|
||||
struct page *cur_page;
|
||||
struct ttm_backend *be = ttm->be;
|
||||
|
||||
INIT_LIST_HEAD(&h);
|
||||
|
||||
if (be)
|
||||
be->func->clear(be);
|
||||
(void)ttm_tt_set_caching(ttm, tt_cached);
|
||||
for (i = 0; i < ttm->num_pages; ++i) {
|
||||
|
||||
cur_page = ttm->pages[i];
|
||||
ttm->pages[i] = NULL;
|
||||
if (cur_page) {
|
||||
|
|
@ -298,9 +294,11 @@ static void ttm_tt_free_alloced_pages(struct ttm_tt *ttm)
|
|||
"Leaking pages.\n");
|
||||
ttm_mem_global_free_page(ttm->glob->mem_glob,
|
||||
cur_page);
|
||||
__free_page(cur_page);
|
||||
list_add(&cur_page->lru, &h);
|
||||
count++;
|
||||
}
|
||||
}
|
||||
ttm_put_pages(&h, count, ttm->page_flags, ttm->caching_state);
|
||||
ttm->state = tt_unpopulated;
|
||||
ttm->first_himem_page = ttm->num_pages;
|
||||
ttm->last_lomem_page = -1;
|
||||
|
|
|
|||
74
include/drm/ttm/ttm_page_alloc.h
Normal file
74
include/drm/ttm/ttm_page_alloc.h
Normal file
|
|
@ -0,0 +1,74 @@
|
|||
/*
|
||||
* Copyright (c) Red Hat Inc.
|
||||
|
||||
* 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, sub license,
|
||||
* 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 NON-INFRINGEMENT. IN NO EVENT SHALL
|
||||
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
|
||||
*
|
||||
* Authors: Dave Airlie <airlied@redhat.com>
|
||||
* Jerome Glisse <jglisse@redhat.com>
|
||||
*/
|
||||
#ifndef TTM_PAGE_ALLOC
|
||||
#define TTM_PAGE_ALLOC
|
||||
|
||||
#include "ttm_bo_driver.h"
|
||||
#include "ttm_memory.h"
|
||||
|
||||
/**
|
||||
* Get count number of pages from pool to pages list.
|
||||
*
|
||||
* @pages: heado of empty linked list where pages are filled.
|
||||
* @flags: ttm flags for page allocation.
|
||||
* @cstate: ttm caching state for the page.
|
||||
* @count: number of pages to allocate.
|
||||
*/
|
||||
int ttm_get_pages(struct list_head *pages,
|
||||
int flags,
|
||||
enum ttm_caching_state cstate,
|
||||
unsigned count);
|
||||
/**
|
||||
* Put linked list of pages to pool.
|
||||
*
|
||||
* @pages: list of pages to free.
|
||||
* @page_count: number of pages in the list. Zero can be passed for unknown
|
||||
* count.
|
||||
* @flags: ttm flags for page allocation.
|
||||
* @cstate: ttm caching state.
|
||||
*/
|
||||
void ttm_put_pages(struct list_head *pages,
|
||||
unsigned page_count,
|
||||
int flags,
|
||||
enum ttm_caching_state cstate);
|
||||
/**
|
||||
* Initialize pool allocator.
|
||||
*
|
||||
* Pool allocator is internaly reference counted so it can be initialized
|
||||
* multiple times but ttm_page_alloc_fini has to be called same number of
|
||||
* times.
|
||||
*/
|
||||
int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages);
|
||||
/**
|
||||
* Free pool allocator.
|
||||
*/
|
||||
void ttm_page_alloc_fini(void);
|
||||
|
||||
/**
|
||||
* Output the state of pools to debugfs file
|
||||
*/
|
||||
extern int ttm_page_alloc_debugfs(struct seq_file *m, void *data);
|
||||
#endif
|
||||
Loading…
Reference in a new issue