diff options
Diffstat (limited to 'drivers/char/drm/drm_pci.c')
| -rw-r--r-- | drivers/char/drm/drm_pci.c | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/drivers/char/drm/drm_pci.c b/drivers/char/drm/drm_pci.c deleted file mode 100644 index b55d5bc6ea6..00000000000 --- a/drivers/char/drm/drm_pci.c +++ /dev/null @@ -1,183 +0,0 @@ -/* drm_pci.h -- PCI DMA memory management wrappers for DRM -*- linux-c -*- */ -/** - * \file drm_pci.c - * \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 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 <linux/dma-mapping.h> -#include "drmP.h" - -/**********************************************************************/ -/** \name PCI memory */ -/*@{*/ - -/** - * \brief Allocate a PCI consistent memory block, for DMA. - */ -drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t align, - dma_addr_t maxaddr) -{ - drm_dma_handle_t *dmah; -#if 1 - unsigned long addr; - size_t sz; -#endif -#ifdef 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; - } - - dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL); - if (!dmah) - return NULL; - - dmah->size = size; - dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size, &dmah->busaddr, GFP_KERNEL | __GFP_COMP); - -#ifdef DRM_DEBUG_MEMORY - if (dmah->vaddr == NULL) { - spin_lock(&drm_mem_lock); - ++drm_mem_stats[area].fail_count; - spin_unlock(&drm_mem_lock); - kfree(dmah); - 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 (dmah->vaddr == NULL) { - kfree(dmah); - return NULL; - } -#endif - - memset(dmah->vaddr, 0, size); - - /* XXX - Is virt_to_page() legal for consistent mem? */ - /* Reserve */ - for (addr = (unsigned long)dmah->vaddr, sz = size; - sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) { - SetPageReserved(virt_to_page(addr)); - } - - return dmah; -} - -EXPORT_SYMBOL(drm_pci_alloc); - -/** - * \brief Free a PCI consistent memory block without freeing its descriptor. - * - * This function is for internal use in the Linux-specific DRM core code. - */ -void __drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah) -{ -#if 1 - unsigned long addr; - size_t sz; -#endif -#ifdef DRM_DEBUG_MEMORY - int area = DRM_MEM_DMA; - int alloc_count; - int free_count; -#endif - - if (!dmah->vaddr) { -#ifdef DRM_DEBUG_MEMORY - DRM_MEM_ERROR(area, "Attempt to free address 0\n"); -#endif - } else { - /* XXX - Is virt_to_page() legal for consistent mem? */ - /* Unreserve */ - for (addr = (unsigned long)dmah->vaddr, sz = dmah->size; - sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) { - ClearPageReserved(virt_to_page(addr)); - } - dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr, - dmah->busaddr); - } - -#ifdef 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 - -} - -/** - * \brief Free a PCI consistent memory block - */ -void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah) -{ - __drm_pci_free(dev, dmah); - kfree(dmah); -} - -EXPORT_SYMBOL(drm_pci_free); - -/*@}*/ |