diff options
Diffstat (limited to 'arch/x86/kernel/pci-gart_64.c')
-rw-r--r-- | arch/x86/kernel/pci-gart_64.c | 157 |
1 files changed, 85 insertions, 72 deletions
diff --git a/arch/x86/kernel/pci-gart_64.c b/arch/x86/kernel/pci-gart_64.c index 98a827ee9ed..e6a0d402f17 100644 --- a/arch/x86/kernel/pci-gart_64.c +++ b/arch/x86/kernel/pci-gart_64.c @@ -16,6 +16,7 @@ #include <linux/agp_backend.h> #include <linux/init.h> #include <linux/mm.h> +#include <linux/sched.h> #include <linux/string.h> #include <linux/spinlock.h> #include <linux/pci.h> @@ -38,6 +39,7 @@ #include <asm/swiotlb.h> #include <asm/dma.h> #include <asm/k8.h> +#include <asm/x86_init.h> static unsigned long iommu_bus_base; /* GART remapping area (physical) */ static unsigned long iommu_size; /* size of remapping area bytes */ @@ -45,6 +47,8 @@ static unsigned long iommu_pages; /* .. and in pages */ static u32 *iommu_gatt_base; /* Remapping table */ +static dma_addr_t bad_dma_addr; + /* * If this is disabled the IOMMU will use an optimized flushing strategy * of only flushing when an mapping is reused. With it true the GART is @@ -91,7 +95,7 @@ static unsigned long alloc_iommu(struct device *dev, int size, base_index = ALIGN(iommu_bus_base & dma_get_seg_boundary(dev), PAGE_SIZE) >> PAGE_SHIFT; - boundary_size = ALIGN((unsigned long long)dma_get_seg_boundary(dev) + 1, + boundary_size = ALIGN((u64)dma_get_seg_boundary(dev) + 1, PAGE_SIZE) >> PAGE_SHIFT; spin_lock_irqsave(&iommu_bitmap_lock, flags); @@ -215,7 +219,7 @@ static dma_addr_t dma_map_area(struct device *dev, dma_addr_t phys_mem, if (panic_on_overflow) panic("dma_map_area overflow %lu bytes\n", size); iommu_full(dev, size, dir); - return bad_dma_address; + return bad_dma_addr; } for (i = 0; i < npages; i++) { @@ -293,7 +297,7 @@ static int dma_map_sg_nonforce(struct device *dev, struct scatterlist *sg, int i; #ifdef CONFIG_IOMMU_DEBUG - printk(KERN_DEBUG "dma_map_sg overflow\n"); + pr_debug("dma_map_sg overflow\n"); #endif for_each_sg(sg, s, nents, i) { @@ -301,7 +305,7 @@ static int dma_map_sg_nonforce(struct device *dev, struct scatterlist *sg, if (nonforced_iommu(dev, addr, s->length)) { addr = dma_map_area(dev, addr, s->length, dir, 0); - if (addr == bad_dma_address) { + if (addr == bad_dma_addr) { if (i > 0) gart_unmap_sg(dev, sg, i, dir, NULL); nents = 0; @@ -388,12 +392,14 @@ static int gart_map_sg(struct device *dev, struct scatterlist *sg, int nents, if (!dev) dev = &x86_dma_fallback_dev; - out = 0; - start = 0; - start_sg = sgmap = sg; - seg_size = 0; - max_seg_size = dma_get_max_seg_size(dev); - ps = NULL; /* shut up gcc */ + out = 0; + start = 0; + start_sg = sg; + sgmap = sg; + seg_size = 0; + max_seg_size = dma_get_max_seg_size(dev); + ps = NULL; /* shut up gcc */ + for_each_sg(sg, s, nents, i) { dma_addr_t addr = sg_phys(s); @@ -416,11 +422,12 @@ static int gart_map_sg(struct device *dev, struct scatterlist *sg, int nents, sgmap, pages, need) < 0) goto error; out++; - seg_size = 0; - sgmap = sg_next(sgmap); - pages = 0; - start = i; - start_sg = s; + + seg_size = 0; + sgmap = sg_next(sgmap); + pages = 0; + start = i; + start_sg = s; } } @@ -454,7 +461,7 @@ error: iommu_full(dev, pages << PAGE_SHIFT, dir); for_each_sg(sg, s, nents, i) - s->dma_address = bad_dma_address; + s->dma_address = bad_dma_addr; return 0; } @@ -478,7 +485,7 @@ gart_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_addr, DMA_BIDIRECTIONAL, align_mask); flush_gart(); - if (paddr != bad_dma_address) { + if (paddr != bad_dma_addr) { *dma_addr = paddr; return page_address(page); } @@ -498,6 +505,11 @@ gart_free_coherent(struct device *dev, size_t size, void *vaddr, free_pages((unsigned long)vaddr, get_order(size)); } +static int gart_mapping_error(struct device *dev, dma_addr_t dma_addr) +{ + return (dma_addr == bad_dma_addr); +} + static int no_agp; static __init unsigned long check_iommu_size(unsigned long aper, u64 aper_size) @@ -514,7 +526,7 @@ static __init unsigned long check_iommu_size(unsigned long aper, u64 aper_size) iommu_size -= round_up(a, PMD_PAGE_SIZE) - a; if (iommu_size < 64*1024*1024) { - printk(KERN_WARNING + pr_warning( "PCI-DMA: Warning: Small IOMMU %luMB." " Consider increasing the AGP aperture in BIOS\n", iommu_size >> 20); @@ -569,28 +581,32 @@ void set_up_gart_resume(u32 aper_order, u32 aper_alloc) aperture_alloc = aper_alloc; } -static int gart_resume(struct sys_device *dev) +static void gart_fixup_northbridges(struct sys_device *dev) { - printk(KERN_INFO "PCI-DMA: Resuming GART IOMMU\n"); + int i; - if (fix_up_north_bridges) { - int i; + if (!fix_up_north_bridges) + return; - printk(KERN_INFO "PCI-DMA: Restoring GART aperture settings\n"); + pr_info("PCI-DMA: Restoring GART aperture settings\n"); - for (i = 0; i < num_k8_northbridges; i++) { - struct pci_dev *dev = k8_northbridges[i]; + for (i = 0; i < num_k8_northbridges; i++) { + struct pci_dev *dev = k8_northbridges[i]; - /* - * Don't enable translations just yet. That is the next - * step. Restore the pre-suspend aperture settings. - */ - pci_write_config_dword(dev, AMD64_GARTAPERTURECTL, - aperture_order << 1); - pci_write_config_dword(dev, AMD64_GARTAPERTUREBASE, - aperture_alloc >> 25); - } + /* + * Don't enable translations just yet. That is the next + * step. Restore the pre-suspend aperture settings. + */ + pci_write_config_dword(dev, AMD64_GARTAPERTURECTL, aperture_order << 1); + pci_write_config_dword(dev, AMD64_GARTAPERTUREBASE, aperture_alloc >> 25); } +} + +static int gart_resume(struct sys_device *dev) +{ + pr_info("PCI-DMA: Resuming GART IOMMU\n"); + + gart_fixup_northbridges(dev); enable_gart_translations(); @@ -603,15 +619,14 @@ static int gart_suspend(struct sys_device *dev, pm_message_t state) } static struct sysdev_class gart_sysdev_class = { - .name = "gart", - .suspend = gart_suspend, - .resume = gart_resume, + .name = "gart", + .suspend = gart_suspend, + .resume = gart_resume, }; static struct sys_device device_gart = { - .id = 0, - .cls = &gart_sysdev_class, + .cls = &gart_sysdev_class, }; /* @@ -626,7 +641,8 @@ static __init int init_k8_gatt(struct agp_kern_info *info) void *gatt; int i, error; - printk(KERN_INFO "PCI-DMA: Disabling AGP.\n"); + pr_info("PCI-DMA: Disabling AGP.\n"); + aper_size = aper_base = info->aper_size = 0; dev = NULL; for (i = 0; i < num_k8_northbridges; i++) { @@ -644,6 +660,7 @@ static __init int init_k8_gatt(struct agp_kern_info *info) } if (!aper_base) goto nommu; + info->aper_base = aper_base; info->aper_size = aper_size >> 20; @@ -666,14 +683,14 @@ static __init int init_k8_gatt(struct agp_kern_info *info) flush_gart(); - printk(KERN_INFO "PCI-DMA: aperture base @ %x size %u KB\n", + pr_info("PCI-DMA: aperture base @ %x size %u KB\n", aper_base, aper_size>>10); return 0; nommu: /* Should not happen anymore */ - printk(KERN_WARNING "PCI-DMA: More than 4GB of RAM and no IOMMU\n" + pr_warning("PCI-DMA: More than 4GB of RAM and no IOMMU\n" "falling back to iommu=soft.\n"); return -1; } @@ -685,14 +702,15 @@ static struct dma_map_ops gart_dma_ops = { .unmap_page = gart_unmap_page, .alloc_coherent = gart_alloc_coherent, .free_coherent = gart_free_coherent, + .mapping_error = gart_mapping_error, }; -void gart_iommu_shutdown(void) +static void gart_iommu_shutdown(void) { struct pci_dev *dev; int i; - if (no_agp && (dma_ops != &gart_dma_ops)) + if (no_agp) return; for (i = 0; i < num_k8_northbridges; i++) { @@ -707,7 +725,7 @@ void gart_iommu_shutdown(void) } } -void __init gart_iommu_init(void) +int __init gart_iommu_init(void) { struct agp_kern_info info; unsigned long iommu_start; @@ -717,7 +735,7 @@ void __init gart_iommu_init(void) long i; if (cache_k8_northbridges() < 0 || num_k8_northbridges == 0) - return; + return 0; #ifndef CONFIG_AGP_AMD64 no_agp = 1; @@ -729,35 +747,28 @@ void __init gart_iommu_init(void) (agp_copy_info(agp_bridge, &info) < 0); #endif - if (swiotlb) - return; - - /* Did we detect a different HW IOMMU? */ - if (iommu_detected && !gart_iommu_aperture) - return; - if (no_iommu || (!force_iommu && max_pfn <= MAX_DMA32_PFN) || !gart_iommu_aperture || (no_agp && init_k8_gatt(&info) < 0)) { if (max_pfn > MAX_DMA32_PFN) { - printk(KERN_WARNING "More than 4GB of memory " - "but GART IOMMU not available.\n"); - printk(KERN_WARNING "falling back to iommu=soft.\n"); + pr_warning("More than 4GB of memory but GART IOMMU not available.\n"); + pr_warning("falling back to iommu=soft.\n"); } - return; + return 0; } /* need to map that range */ - aper_size = info.aper_size << 20; - aper_base = info.aper_base; - end_pfn = (aper_base>>PAGE_SHIFT) + (aper_size>>PAGE_SHIFT); + aper_size = info.aper_size << 20; + aper_base = info.aper_base; + end_pfn = (aper_base>>PAGE_SHIFT) + (aper_size>>PAGE_SHIFT); + if (end_pfn > max_low_pfn_mapped) { start_pfn = (aper_base>>PAGE_SHIFT); init_memory_mapping(start_pfn<<PAGE_SHIFT, end_pfn<<PAGE_SHIFT); } - printk(KERN_INFO "PCI-DMA: using GART IOMMU.\n"); + pr_info("PCI-DMA: using GART IOMMU.\n"); iommu_size = check_iommu_size(info.aper_base, aper_size); iommu_pages = iommu_size >> PAGE_SHIFT; @@ -772,8 +783,7 @@ void __init gart_iommu_init(void) ret = dma_debug_resize_entries(iommu_pages); if (ret) - printk(KERN_DEBUG - "PCI-DMA: Cannot trace all the entries\n"); + pr_debug("PCI-DMA: Cannot trace all the entries\n"); } #endif @@ -783,15 +793,14 @@ void __init gart_iommu_init(void) */ iommu_area_reserve(iommu_gart_bitmap, 0, EMERGENCY_PAGES); - agp_memory_reserved = iommu_size; - printk(KERN_INFO - "PCI-DMA: Reserving %luMB of IOMMU area in the AGP aperture\n", + pr_info("PCI-DMA: Reserving %luMB of IOMMU area in the AGP aperture\n", iommu_size >> 20); - iommu_start = aper_size - iommu_size; - iommu_bus_base = info.aper_base + iommu_start; - bad_dma_address = iommu_bus_base; - iommu_gatt_base = agp_gatt_table + (iommu_start>>PAGE_SHIFT); + agp_memory_reserved = iommu_size; + iommu_start = aper_size - iommu_size; + iommu_bus_base = info.aper_base + iommu_start; + bad_dma_addr = iommu_bus_base; + iommu_gatt_base = agp_gatt_table + (iommu_start>>PAGE_SHIFT); /* * Unmap the IOMMU part of the GART. The alias of the page is @@ -813,7 +822,7 @@ void __init gart_iommu_init(void) * the pages as Not-Present: */ wbinvd(); - + /* * Now all caches are flushed and we can safely enable * GART hardware. Doing it early leaves the possibility @@ -837,6 +846,10 @@ void __init gart_iommu_init(void) flush_gart(); dma_ops = &gart_dma_ops; + x86_platform.iommu_shutdown = gart_iommu_shutdown; + swiotlb = 0; + + return 0; } void __init gart_parse_options(char *p) @@ -855,7 +868,7 @@ void __init gart_parse_options(char *p) #endif if (isdigit(*p) && get_option(&p, &arg)) iommu_size = arg; - if (!strncmp(p, "fullflush", 8)) + if (!strncmp(p, "fullflush", 9)) iommu_fullflush = 1; if (!strncmp(p, "nofullflush", 11)) iommu_fullflush = 0; |