605 lines
15 KiB
C
605 lines
15 KiB
C
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/**************************************************************************
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*
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* Copyright (c) 2007-2009 VMware, Inc., Palo Alto, CA., USA
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* All Rights Reserved.
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*
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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
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* 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 COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/*
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* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
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*/
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#include "ttm/ttm_bo_driver.h"
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#include "ttm/ttm_placement.h"
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#include <linux/io.h>
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#include <linux/highmem.h>
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#include <linux/wait.h>
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#include <linux/vmalloc.h>
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#include <linux/module.h>
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void ttm_bo_free_old_node(struct ttm_buffer_object *bo)
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{
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struct ttm_mem_reg *old_mem = &bo->mem;
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if (old_mem->mm_node) {
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spin_lock(&bo->glob->lru_lock);
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drm_mm_put_block(old_mem->mm_node);
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spin_unlock(&bo->glob->lru_lock);
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}
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old_mem->mm_node = NULL;
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}
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int ttm_bo_move_ttm(struct ttm_buffer_object *bo,
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bool evict, bool no_wait, struct ttm_mem_reg *new_mem)
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{
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struct ttm_tt *ttm = bo->ttm;
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struct ttm_mem_reg *old_mem = &bo->mem;
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uint32_t save_flags = old_mem->placement;
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int ret;
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if (old_mem->mem_type != TTM_PL_SYSTEM) {
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ttm_tt_unbind(ttm);
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ttm_bo_free_old_node(bo);
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ttm_flag_masked(&old_mem->placement, TTM_PL_FLAG_SYSTEM,
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TTM_PL_MASK_MEM);
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old_mem->mem_type = TTM_PL_SYSTEM;
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save_flags = old_mem->placement;
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}
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ret = ttm_tt_set_placement_caching(ttm, new_mem->placement);
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if (unlikely(ret != 0))
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return ret;
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if (new_mem->mem_type != TTM_PL_SYSTEM) {
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ret = ttm_tt_bind(ttm, new_mem);
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if (unlikely(ret != 0))
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return ret;
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}
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*old_mem = *new_mem;
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new_mem->mm_node = NULL;
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ttm_flag_masked(&save_flags, new_mem->placement, TTM_PL_MASK_MEMTYPE);
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return 0;
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}
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EXPORT_SYMBOL(ttm_bo_move_ttm);
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int ttm_mem_reg_ioremap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem,
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void **virtual)
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{
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struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
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unsigned long bus_offset;
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unsigned long bus_size;
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unsigned long bus_base;
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int ret;
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void *addr;
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*virtual = NULL;
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ret = ttm_bo_pci_offset(bdev, mem, &bus_base, &bus_offset, &bus_size);
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if (ret || bus_size == 0)
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return ret;
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if (!(man->flags & TTM_MEMTYPE_FLAG_NEEDS_IOREMAP))
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addr = (void *)(((u8 *) man->io_addr) + bus_offset);
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else {
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if (mem->placement & TTM_PL_FLAG_WC)
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addr = ioremap_wc(bus_base + bus_offset, bus_size);
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else
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addr = ioremap_nocache(bus_base + bus_offset, bus_size);
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if (!addr)
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return -ENOMEM;
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}
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*virtual = addr;
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return 0;
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}
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void ttm_mem_reg_iounmap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem,
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void *virtual)
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{
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struct ttm_mem_type_manager *man;
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man = &bdev->man[mem->mem_type];
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if (virtual && (man->flags & TTM_MEMTYPE_FLAG_NEEDS_IOREMAP))
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iounmap(virtual);
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}
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static int ttm_copy_io_page(void *dst, void *src, unsigned long page)
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{
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uint32_t *dstP =
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(uint32_t *) ((unsigned long)dst + (page << PAGE_SHIFT));
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uint32_t *srcP =
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(uint32_t *) ((unsigned long)src + (page << PAGE_SHIFT));
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int i;
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for (i = 0; i < PAGE_SIZE / sizeof(uint32_t); ++i)
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iowrite32(ioread32(srcP++), dstP++);
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return 0;
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}
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static int ttm_copy_io_ttm_page(struct ttm_tt *ttm, void *src,
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unsigned long page,
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pgprot_t prot)
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{
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struct page *d = ttm_tt_get_page(ttm, page);
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void *dst;
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if (!d)
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return -ENOMEM;
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src = (void *)((unsigned long)src + (page << PAGE_SHIFT));
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#ifdef CONFIG_X86
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dst = kmap_atomic_prot(d, KM_USER0, prot);
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#else
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if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
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dst = vmap(&d, 1, 0, prot);
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else
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dst = kmap(d);
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#endif
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if (!dst)
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return -ENOMEM;
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memcpy_fromio(dst, src, PAGE_SIZE);
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#ifdef CONFIG_X86
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kunmap_atomic(dst, KM_USER0);
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#else
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if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
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vunmap(dst);
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else
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kunmap(d);
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#endif
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return 0;
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}
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static int ttm_copy_ttm_io_page(struct ttm_tt *ttm, void *dst,
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unsigned long page,
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pgprot_t prot)
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{
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struct page *s = ttm_tt_get_page(ttm, page);
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void *src;
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if (!s)
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return -ENOMEM;
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dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT));
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#ifdef CONFIG_X86
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src = kmap_atomic_prot(s, KM_USER0, prot);
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#else
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if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
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src = vmap(&s, 1, 0, prot);
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else
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src = kmap(s);
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#endif
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if (!src)
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return -ENOMEM;
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memcpy_toio(dst, src, PAGE_SIZE);
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#ifdef CONFIG_X86
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kunmap_atomic(src, KM_USER0);
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#else
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if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
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vunmap(src);
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else
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kunmap(s);
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#endif
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return 0;
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}
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int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
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bool evict, bool no_wait, struct ttm_mem_reg *new_mem)
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{
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struct ttm_bo_device *bdev = bo->bdev;
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struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type];
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struct ttm_tt *ttm = bo->ttm;
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struct ttm_mem_reg *old_mem = &bo->mem;
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struct ttm_mem_reg old_copy = *old_mem;
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void *old_iomap;
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void *new_iomap;
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int ret;
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uint32_t save_flags = old_mem->placement;
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unsigned long i;
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unsigned long page;
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unsigned long add = 0;
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int dir;
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ret = ttm_mem_reg_ioremap(bdev, old_mem, &old_iomap);
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if (ret)
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return ret;
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ret = ttm_mem_reg_ioremap(bdev, new_mem, &new_iomap);
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if (ret)
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goto out;
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if (old_iomap == NULL && new_iomap == NULL)
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goto out2;
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if (old_iomap == NULL && ttm == NULL)
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goto out2;
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add = 0;
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dir = 1;
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if ((old_mem->mem_type == new_mem->mem_type) &&
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(new_mem->mm_node->start <
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old_mem->mm_node->start + old_mem->mm_node->size)) {
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dir = -1;
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add = new_mem->num_pages - 1;
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}
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for (i = 0; i < new_mem->num_pages; ++i) {
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page = i * dir + add;
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if (old_iomap == NULL) {
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pgprot_t prot = ttm_io_prot(old_mem->placement,
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PAGE_KERNEL);
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ret = ttm_copy_ttm_io_page(ttm, new_iomap, page,
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prot);
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} else if (new_iomap == NULL) {
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pgprot_t prot = ttm_io_prot(new_mem->placement,
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PAGE_KERNEL);
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ret = ttm_copy_io_ttm_page(ttm, old_iomap, page,
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prot);
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} else
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ret = ttm_copy_io_page(new_iomap, old_iomap, page);
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if (ret)
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goto out1;
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}
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mb();
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out2:
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ttm_bo_free_old_node(bo);
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*old_mem = *new_mem;
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new_mem->mm_node = NULL;
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ttm_flag_masked(&save_flags, new_mem->placement, TTM_PL_MASK_MEMTYPE);
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if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && (ttm != NULL)) {
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ttm_tt_unbind(ttm);
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ttm_tt_destroy(ttm);
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bo->ttm = NULL;
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}
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out1:
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ttm_mem_reg_iounmap(bdev, new_mem, new_iomap);
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out:
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ttm_mem_reg_iounmap(bdev, &old_copy, old_iomap);
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return ret;
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}
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EXPORT_SYMBOL(ttm_bo_move_memcpy);
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static void ttm_transfered_destroy(struct ttm_buffer_object *bo)
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{
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kfree(bo);
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}
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/**
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* ttm_buffer_object_transfer
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*
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* @bo: A pointer to a struct ttm_buffer_object.
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* @new_obj: A pointer to a pointer to a newly created ttm_buffer_object,
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* holding the data of @bo with the old placement.
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*
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* This is a utility function that may be called after an accelerated move
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* has been scheduled. A new buffer object is created as a placeholder for
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* the old data while it's being copied. When that buffer object is idle,
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* it can be destroyed, releasing the space of the old placement.
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* Returns:
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* !0: Failure.
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*/
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static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo,
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struct ttm_buffer_object **new_obj)
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{
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struct ttm_buffer_object *fbo;
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struct ttm_bo_device *bdev = bo->bdev;
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struct ttm_bo_driver *driver = bdev->driver;
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fbo = kzalloc(sizeof(*fbo), GFP_KERNEL);
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if (!fbo)
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return -ENOMEM;
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*fbo = *bo;
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/**
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* Fix up members that we shouldn't copy directly:
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* TODO: Explicit member copy would probably be better here.
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*/
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spin_lock_init(&fbo->lock);
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init_waitqueue_head(&fbo->event_queue);
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INIT_LIST_HEAD(&fbo->ddestroy);
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INIT_LIST_HEAD(&fbo->lru);
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INIT_LIST_HEAD(&fbo->swap);
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fbo->vm_node = NULL;
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atomic_set(&fbo->cpu_writers, 0);
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fbo->sync_obj = driver->sync_obj_ref(bo->sync_obj);
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if (fbo->mem.mm_node)
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fbo->mem.mm_node->private = (void *)fbo;
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kref_init(&fbo->list_kref);
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kref_init(&fbo->kref);
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fbo->destroy = &ttm_transfered_destroy;
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*new_obj = fbo;
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return 0;
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}
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pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp)
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{
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#if defined(__i386__) || defined(__x86_64__)
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if (caching_flags & TTM_PL_FLAG_WC)
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tmp = pgprot_writecombine(tmp);
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else if (boot_cpu_data.x86 > 3)
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tmp = pgprot_noncached(tmp);
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#elif defined(__powerpc__)
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if (!(caching_flags & TTM_PL_FLAG_CACHED)) {
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pgprot_val(tmp) |= _PAGE_NO_CACHE;
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if (caching_flags & TTM_PL_FLAG_UNCACHED)
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pgprot_val(tmp) |= _PAGE_GUARDED;
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}
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#endif
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#if defined(__ia64__)
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if (caching_flags & TTM_PL_FLAG_WC)
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tmp = pgprot_writecombine(tmp);
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||
|
|
else
|
||
|
|
tmp = pgprot_noncached(tmp);
|
||
|
|
#endif
|
||
|
|
#if defined(__sparc__)
|
||
|
|
if (!(caching_flags & TTM_PL_FLAG_CACHED))
|
||
|
|
tmp = pgprot_noncached(tmp);
|
||
|
|
#endif
|
||
|
|
return tmp;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ttm_bo_ioremap(struct ttm_buffer_object *bo,
|
||
|
|
unsigned long bus_base,
|
||
|
|
unsigned long bus_offset,
|
||
|
|
unsigned long bus_size,
|
||
|
|
struct ttm_bo_kmap_obj *map)
|
||
|
|
{
|
||
|
|
struct ttm_bo_device *bdev = bo->bdev;
|
||
|
|
struct ttm_mem_reg *mem = &bo->mem;
|
||
|
|
struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
|
||
|
|
|
||
|
|
if (!(man->flags & TTM_MEMTYPE_FLAG_NEEDS_IOREMAP)) {
|
||
|
|
map->bo_kmap_type = ttm_bo_map_premapped;
|
||
|
|
map->virtual = (void *)(((u8 *) man->io_addr) + bus_offset);
|
||
|
|
} else {
|
||
|
|
map->bo_kmap_type = ttm_bo_map_iomap;
|
||
|
|
if (mem->placement & TTM_PL_FLAG_WC)
|
||
|
|
map->virtual = ioremap_wc(bus_base + bus_offset,
|
||
|
|
bus_size);
|
||
|
|
else
|
||
|
|
map->virtual = ioremap_nocache(bus_base + bus_offset,
|
||
|
|
bus_size);
|
||
|
|
}
|
||
|
|
return (!map->virtual) ? -ENOMEM : 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo,
|
||
|
|
unsigned long start_page,
|
||
|
|
unsigned long num_pages,
|
||
|
|
struct ttm_bo_kmap_obj *map)
|
||
|
|
{
|
||
|
|
struct ttm_mem_reg *mem = &bo->mem; pgprot_t prot;
|
||
|
|
struct ttm_tt *ttm = bo->ttm;
|
||
|
|
struct page *d;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
BUG_ON(!ttm);
|
||
|
|
if (num_pages == 1 && (mem->placement & TTM_PL_FLAG_CACHED)) {
|
||
|
|
/*
|
||
|
|
* We're mapping a single page, and the desired
|
||
|
|
* page protection is consistent with the bo.
|
||
|
|
*/
|
||
|
|
|
||
|
|
map->bo_kmap_type = ttm_bo_map_kmap;
|
||
|
|
map->page = ttm_tt_get_page(ttm, start_page);
|
||
|
|
map->virtual = kmap(map->page);
|
||
|
|
} else {
|
||
|
|
/*
|
||
|
|
* Populate the part we're mapping;
|
||
|
|
*/
|
||
|
|
for (i = start_page; i < start_page + num_pages; ++i) {
|
||
|
|
d = ttm_tt_get_page(ttm, i);
|
||
|
|
if (!d)
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* We need to use vmap to get the desired page protection
|
||
|
|
* or to make the buffer object look contigous.
|
||
|
|
*/
|
||
|
|
prot = (mem->placement & TTM_PL_FLAG_CACHED) ?
|
||
|
|
PAGE_KERNEL :
|
||
|
|
ttm_io_prot(mem->placement, PAGE_KERNEL);
|
||
|
|
map->bo_kmap_type = ttm_bo_map_vmap;
|
||
|
|
map->virtual = vmap(ttm->pages + start_page, num_pages,
|
||
|
|
0, prot);
|
||
|
|
}
|
||
|
|
return (!map->virtual) ? -ENOMEM : 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int ttm_bo_kmap(struct ttm_buffer_object *bo,
|
||
|
|
unsigned long start_page, unsigned long num_pages,
|
||
|
|
struct ttm_bo_kmap_obj *map)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
unsigned long bus_base;
|
||
|
|
unsigned long bus_offset;
|
||
|
|
unsigned long bus_size;
|
||
|
|
|
||
|
|
BUG_ON(!list_empty(&bo->swap));
|
||
|
|
map->virtual = NULL;
|
||
|
|
if (num_pages > bo->num_pages)
|
||
|
|
return -EINVAL;
|
||
|
|
if (start_page > bo->num_pages)
|
||
|
|
return -EINVAL;
|
||
|
|
#if 0
|
||
|
|
if (num_pages > 1 && !DRM_SUSER(DRM_CURPROC))
|
||
|
|
return -EPERM;
|
||
|
|
#endif
|
||
|
|
ret = ttm_bo_pci_offset(bo->bdev, &bo->mem, &bus_base,
|
||
|
|
&bus_offset, &bus_size);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
if (bus_size == 0) {
|
||
|
|
return ttm_bo_kmap_ttm(bo, start_page, num_pages, map);
|
||
|
|
} else {
|
||
|
|
bus_offset += start_page << PAGE_SHIFT;
|
||
|
|
bus_size = num_pages << PAGE_SHIFT;
|
||
|
|
return ttm_bo_ioremap(bo, bus_base, bus_offset, bus_size, map);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(ttm_bo_kmap);
|
||
|
|
|
||
|
|
void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map)
|
||
|
|
{
|
||
|
|
if (!map->virtual)
|
||
|
|
return;
|
||
|
|
switch (map->bo_kmap_type) {
|
||
|
|
case ttm_bo_map_iomap:
|
||
|
|
iounmap(map->virtual);
|
||
|
|
break;
|
||
|
|
case ttm_bo_map_vmap:
|
||
|
|
vunmap(map->virtual);
|
||
|
|
break;
|
||
|
|
case ttm_bo_map_kmap:
|
||
|
|
kunmap(map->page);
|
||
|
|
break;
|
||
|
|
case ttm_bo_map_premapped:
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
BUG();
|
||
|
|
}
|
||
|
|
map->virtual = NULL;
|
||
|
|
map->page = NULL;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(ttm_bo_kunmap);
|
||
|
|
|
||
|
|
int ttm_bo_pfn_prot(struct ttm_buffer_object *bo,
|
||
|
|
unsigned long dst_offset,
|
||
|
|
unsigned long *pfn, pgprot_t *prot)
|
||
|
|
{
|
||
|
|
struct ttm_mem_reg *mem = &bo->mem;
|
||
|
|
struct ttm_bo_device *bdev = bo->bdev;
|
||
|
|
unsigned long bus_offset;
|
||
|
|
unsigned long bus_size;
|
||
|
|
unsigned long bus_base;
|
||
|
|
int ret;
|
||
|
|
ret = ttm_bo_pci_offset(bdev, mem, &bus_base, &bus_offset,
|
||
|
|
&bus_size);
|
||
|
|
if (ret)
|
||
|
|
return -EINVAL;
|
||
|
|
if (bus_size != 0)
|
||
|
|
*pfn = (bus_base + bus_offset + dst_offset) >> PAGE_SHIFT;
|
||
|
|
else
|
||
|
|
if (!bo->ttm)
|
||
|
|
return -EINVAL;
|
||
|
|
else
|
||
|
|
*pfn = page_to_pfn(ttm_tt_get_page(bo->ttm,
|
||
|
|
dst_offset >>
|
||
|
|
PAGE_SHIFT));
|
||
|
|
*prot = (mem->placement & TTM_PL_FLAG_CACHED) ?
|
||
|
|
PAGE_KERNEL : ttm_io_prot(mem->placement, PAGE_KERNEL);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
|
||
|
|
void *sync_obj,
|
||
|
|
void *sync_obj_arg,
|
||
|
|
bool evict, bool no_wait,
|
||
|
|
struct ttm_mem_reg *new_mem)
|
||
|
|
{
|
||
|
|
struct ttm_bo_device *bdev = bo->bdev;
|
||
|
|
struct ttm_bo_driver *driver = bdev->driver;
|
||
|
|
struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type];
|
||
|
|
struct ttm_mem_reg *old_mem = &bo->mem;
|
||
|
|
int ret;
|
||
|
|
uint32_t save_flags = old_mem->placement;
|
||
|
|
struct ttm_buffer_object *ghost_obj;
|
||
|
|
void *tmp_obj = NULL;
|
||
|
|
|
||
|
|
spin_lock(&bo->lock);
|
||
|
|
if (bo->sync_obj) {
|
||
|
|
tmp_obj = bo->sync_obj;
|
||
|
|
bo->sync_obj = NULL;
|
||
|
|
}
|
||
|
|
bo->sync_obj = driver->sync_obj_ref(sync_obj);
|
||
|
|
bo->sync_obj_arg = sync_obj_arg;
|
||
|
|
if (evict) {
|
||
|
|
ret = ttm_bo_wait(bo, false, false, false);
|
||
|
|
spin_unlock(&bo->lock);
|
||
|
|
if (tmp_obj)
|
||
|
|
driver->sync_obj_unref(&tmp_obj);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
ttm_bo_free_old_node(bo);
|
||
|
|
if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) &&
|
||
|
|
(bo->ttm != NULL)) {
|
||
|
|
ttm_tt_unbind(bo->ttm);
|
||
|
|
ttm_tt_destroy(bo->ttm);
|
||
|
|
bo->ttm = NULL;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
/**
|
||
|
|
* This should help pipeline ordinary buffer moves.
|
||
|
|
*
|
||
|
|
* Hang old buffer memory on a new buffer object,
|
||
|
|
* and leave it to be released when the GPU
|
||
|
|
* operation has completed.
|
||
|
|
*/
|
||
|
|
|
||
|
|
set_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags);
|
||
|
|
spin_unlock(&bo->lock);
|
||
|
|
if (tmp_obj)
|
||
|
|
driver->sync_obj_unref(&tmp_obj);
|
||
|
|
|
||
|
|
ret = ttm_buffer_object_transfer(bo, &ghost_obj);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* If we're not moving to fixed memory, the TTM object
|
||
|
|
* needs to stay alive. Otherwhise hang it on the ghost
|
||
|
|
* bo to be unbound and destroyed.
|
||
|
|
*/
|
||
|
|
|
||
|
|
if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED))
|
||
|
|
ghost_obj->ttm = NULL;
|
||
|
|
else
|
||
|
|
bo->ttm = NULL;
|
||
|
|
|
||
|
|
ttm_bo_unreserve(ghost_obj);
|
||
|
|
ttm_bo_unref(&ghost_obj);
|
||
|
|
}
|
||
|
|
|
||
|
|
*old_mem = *new_mem;
|
||
|
|
new_mem->mm_node = NULL;
|
||
|
|
ttm_flag_masked(&save_flags, new_mem->placement, TTM_PL_MASK_MEMTYPE);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(ttm_bo_move_accel_cleanup);
|