diff options
Diffstat (limited to 'sys/dev/drm/ati_pcigart.c')
| -rw-r--r-- | sys/dev/drm/ati_pcigart.c | 148 |
1 files changed, 103 insertions, 45 deletions
diff --git a/sys/dev/drm/ati_pcigart.c b/sys/dev/drm/ati_pcigart.c index 386702c..dac400d 100644 --- a/sys/dev/drm/ati_pcigart.c +++ b/sys/dev/drm/ati_pcigart.c @@ -1,6 +1,3 @@ -/* ati_pcigart.h -- ATI PCI GART support -*- linux-c -*- - * Created: Wed Dec 13 21:52:19 2000 by gareth@valinux.com - */ /*- * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. * All Rights Reserved. @@ -32,72 +29,133 @@ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); +/** @file ati_pcigart.c + * Implementation of ATI's PCIGART, which provides an aperture in card virtual + * address space with addresses remapped to system memory. + */ + #include "dev/drm/drmP.h" #define ATI_PCIGART_PAGE_SIZE 4096 /* PCI GART page size */ -#define ATI_MAX_PCIGART_PAGES 8192 /* 32 MB aperture, 4K pages */ -#define ATI_PCIGART_TABLE_SIZE 32768 +#define ATI_PCIGART_PAGE_MASK (~(ATI_PCIGART_PAGE_SIZE-1)) -int drm_ati_pcigart_init(drm_device_t *dev, drm_ati_pcigart_info *gart_info) +#define ATI_PCIE_WRITE 0x4 +#define ATI_PCIE_READ 0x8 + +static int drm_ati_alloc_pcigart_table(struct drm_device *dev, + struct drm_ati_pcigart_info *gart_info) { - unsigned long pages; - u32 *pci_gart = NULL, page_base; - int i, j; + dev->sg->dmah = drm_pci_alloc(dev, gart_info->table_size, + PAGE_SIZE, + gart_info->table_mask); + if (dev->sg->dmah == NULL) + return ENOMEM; + + return 0; +} + +static void drm_ati_free_pcigart_table(struct drm_device *dev, + struct drm_ati_pcigart_info *gart_info) +{ + drm_pci_free(dev, dev->sg->dmah); + dev->sg->dmah = NULL; +} +int drm_ati_pcigart_cleanup(struct drm_device *dev, struct drm_ati_pcigart_info *gart_info) +{ + /* we need to support large memory configurations */ if (dev->sg == NULL) { - DRM_ERROR( "no scatter/gather memory!\n" ); + DRM_ERROR("no scatter/gather memory!\n"); return 0; } + if (gart_info->bus_addr) { + if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) { + gart_info->bus_addr = 0; + if (dev->sg->dmah) + drm_ati_free_pcigart_table(dev, gart_info); + } + } + + return 1; +} + +int drm_ati_pcigart_init(struct drm_device *dev, + struct drm_ati_pcigart_info *gart_info) +{ + + void *address = NULL; + unsigned long pages; + u32 *pci_gart, page_base; + dma_addr_t bus_address = 0; + int i, j, ret = 0; + int max_pages; + dma_addr_t entry_addr; + + /* we need to support large memory configurations */ + if (dev->sg == NULL) { + DRM_ERROR("no scatter/gather memory!\n"); + goto done; + } + if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) { - /* GART table in system memory */ - dev->sg->dmah = drm_pci_alloc(dev, ATI_PCIGART_TABLE_SIZE, 0, - 0xfffffffful); - if (dev->sg->dmah == NULL) { - DRM_ERROR("cannot allocate PCI GART table!\n"); - return 0; + DRM_DEBUG("PCI: no table in VRAM: using normal RAM\n"); + + ret = drm_ati_alloc_pcigart_table(dev, gart_info); + if (ret) { + DRM_ERROR("cannot allocate PCI GART page!\n"); + goto done; } - - gart_info->addr = (void *)dev->sg->dmah->vaddr; - gart_info->bus_addr = dev->sg->dmah->busaddr; - pci_gart = (u32 *)dev->sg->dmah->vaddr; + + address = (void *)dev->sg->dmah->vaddr; + bus_address = dev->sg->dmah->busaddr; } else { - /* GART table in framebuffer memory */ - pci_gart = gart_info->addr; + address = gart_info->addr; + bus_address = gart_info->bus_addr; + DRM_DEBUG("PCI: Gart Table: VRAM %08X mapped at %08lX\n", + (unsigned int)bus_address, (unsigned long)address); } - - pages = DRM_MIN(dev->sg->pages, ATI_MAX_PCIGART_PAGES); - bzero(pci_gart, ATI_PCIGART_TABLE_SIZE); + pci_gart = (u32 *) address; - KASSERT(PAGE_SIZE >= ATI_PCIGART_PAGE_SIZE, ("page size too small")); + max_pages = (gart_info->table_size / sizeof(u32)); + pages = (dev->sg->pages <= max_pages) + ? dev->sg->pages : max_pages; - for ( i = 0 ; i < pages ; i++ ) { - page_base = (u32) dev->sg->busaddr[i]; + memset(pci_gart, 0, max_pages * sizeof(u32)); + + KASSERT(PAGE_SIZE >= ATI_PCIGART_PAGE_SIZE, ("page size too small")); + for (i = 0; i < pages; i++) { + entry_addr = dev->sg->busaddr[i]; for (j = 0; j < (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE); j++) { - if (gart_info->is_pcie) - *pci_gart = (cpu_to_le32(page_base) >> 8) | 0xc; - else - *pci_gart = cpu_to_le32(page_base); + page_base = (u32) entry_addr & ATI_PCIGART_PAGE_MASK; + switch(gart_info->gart_reg_if) { + case DRM_ATI_GART_IGP: + page_base |= (upper_32_bits(entry_addr) & 0xff) << 4; + page_base |= 0xc; + break; + case DRM_ATI_GART_PCIE: + page_base >>= 8; + page_base |= (upper_32_bits(entry_addr) & 0xff) << 24; + page_base |= ATI_PCIE_READ | ATI_PCIE_WRITE; + break; + default: + case DRM_ATI_GART_PCI: + break; + } + *pci_gart = cpu_to_le32(page_base); pci_gart++; - page_base += ATI_PCIGART_PAGE_SIZE; + entry_addr += ATI_PCIGART_PAGE_SIZE; } } DRM_MEMORYBARRIER(); - return 1; -} - -int drm_ati_pcigart_cleanup(drm_device_t *dev, drm_ati_pcigart_info *gart_info) -{ - if (dev->sg == NULL) { - DRM_ERROR( "no scatter/gather memory!\n" ); - return 0; - } + ret = 1; - drm_pci_free(dev, dev->sg->dmah); - - return 1; + done: + gart_info->addr = address; + gart_info->bus_addr = bus_address; + return ret; } |
