diff options
Diffstat (limited to 'linux/drm_pci.h')
| -rw-r--r-- | linux/drm_pci.h | 169 |
1 files changed, 0 insertions, 169 deletions
diff --git a/linux/drm_pci.h b/linux/drm_pci.h deleted file mode 100644 index b9d54c45..00000000 --- a/linux/drm_pci.h +++ /dev/null @@ -1,169 +0,0 @@ -/* drm_pci.h -- PCI DMA memory management wrappers for DRM -*- linux-c -*- */ -/** - * \file drm_pci.h - * \brief Functions and ioctls to manage PCI memory - * - * \warning These interfaces aren't stable yet. - * - * \todo Implement the remaining ioctl's for the PCI pools. - * \todo Add support to map these buffers. - * \todo The wrappers here are so thin that they would be better off inlined.. - * - * \author José Fonseca <jrfonseca@tungstengraphics.com> - * \author Leif Delgass <ldelgass@retinalburn.net> - */ - -/* - * Copyright 2003 José Fonseca. - * Copyright 2003 Leif Delgass. - * All Rights Reserved. - * - * 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, sublicense, - * 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 NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS 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. - */ - - -#include <linux/pci.h> -#include "drmP.h" - -/**********************************************************************/ -/** \name PCI memory */ -/*@{*/ - - -/** - * \brief Allocate a PCI consistent memory block, for DMA. - */ -void * -DRM(pci_alloc)(drm_device_t *dev, size_t size, size_t align, - dma_addr_t maxaddr, dma_addr_t *busaddr) -{ - void *address; -#if 0 - unsigned long addr; - size_t sz; -#endif -#if DRM_DEBUG_MEMORY - int area = DRM_MEM_DMA; - - spin_lock(&DRM(mem_lock)); - if ((DRM(ram_used) >> PAGE_SHIFT) - > (DRM_RAM_PERCENT * DRM(ram_available)) / 100) { - spin_unlock(&DRM(mem_lock)); - return 0; - } - spin_unlock(&DRM(mem_lock)); -#endif - - /* pci_alloc_consistent only guarantees alignment to the smallest - * PAGE_SIZE order which is greater than or equal to the requested size. - * Return NULL here for now to make sure nobody tries for larger alignment - */ - if (align > size) - return NULL; - - if (pci_set_dma_mask( dev->pdev, maxaddr ) != 0) { - DRM_ERROR( "Setting pci dma mask failed\n" ); - return NULL; - } - - address = pci_alloc_consistent( dev->pdev, size, busaddr ); - -#if DRM_DEBUG_MEMORY - if (address == NULL) { - spin_lock(&DRM(mem_lock)); - ++DRM(mem_stats)[area].fail_count; - spin_unlock(&DRM(mem_lock)); - return NULL; - } - - spin_lock(&DRM(mem_lock)); - ++DRM(mem_stats)[area].succeed_count; - DRM(mem_stats)[area].bytes_allocated += size; - DRM(ram_used) += size; - spin_unlock(&DRM(mem_lock)); -#else - if (address == NULL) - return NULL; -#endif - - memset(address, 0, size); - -#if 0 - /* XXX - Is virt_to_page() legal for consistent mem? */ - /* Reserve */ - for (addr = (unsigned long)address, sz = size; - sz > 0; - addr += PAGE_SIZE, sz -= PAGE_SIZE) { - SetPageReserved(virt_to_page(addr)); - } -#endif - - return address; -} - -/** - * \brief Free a PCI consistent memory block. - */ -void -DRM(pci_free)(drm_device_t *dev, size_t size, void *vaddr, dma_addr_t busaddr) -{ -#if 0 - unsigned long addr; - size_t sz; -#endif -#if DRM_DEBUG_MEMORY - int area = DRM_MEM_DMA; - int alloc_count; - int free_count; -#endif - - if (!vaddr) { -#if DRM_DEBUG_MEMORY - DRM_MEM_ERROR(area, "Attempt to free address 0\n"); -#endif - } else { -#if 0 - /* XXX - Is virt_to_page() legal for consistent mem? */ - /* Unreserve */ - for (addr = (unsigned long)vaddr, sz = size; - sz > 0; - addr += PAGE_SIZE, sz -= PAGE_SIZE) { - ClearPageReserved(virt_to_page(addr)); - } -#endif - pci_free_consistent( dev->pdev, size, vaddr, busaddr ); - } - -#if DRM_DEBUG_MEMORY - spin_lock(&DRM(mem_lock)); - free_count = ++DRM(mem_stats)[area].free_count; - alloc_count = DRM(mem_stats)[area].succeed_count; - DRM(mem_stats)[area].bytes_freed += size; - DRM(ram_used) -= size; - spin_unlock(&DRM(mem_lock)); - if (free_count > alloc_count) { - DRM_MEM_ERROR(area, - "Excess frees: %d frees, %d allocs\n", - free_count, alloc_count); - } -#endif - -} - -/*@}*/ |