Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #include <linux/module.h> |
| 2 | #include <linux/pci.h> |
| 3 | #include <linux/init.h> |
| 4 | #include <linux/agp_backend.h> |
| 5 | #include <linux/mm.h> |
| 6 | #include <linux/slab.h> |
| 7 | |
| 8 | #include <asm/machvec.h> |
| 9 | #include <asm/agp_backend.h> |
| 10 | #include "../../../arch/alpha/kernel/pci_impl.h" |
| 11 | |
| 12 | #include "agp.h" |
| 13 | |
Nick Piggin | 6d6f8d5 | 2008-02-04 22:30:04 -0800 | [diff] [blame] | 14 | static int alpha_core_agp_vm_fault(struct vm_area_struct *vma, |
| 15 | struct vm_fault *vmf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | { |
| 17 | alpha_agp_info *agp = agp_bridge->dev_private_data; |
| 18 | dma_addr_t dma_addr; |
| 19 | unsigned long pa; |
| 20 | struct page *page; |
| 21 | |
Nick Piggin | 6d6f8d5 | 2008-02-04 22:30:04 -0800 | [diff] [blame] | 22 | dma_addr = (unsigned long)vmf->virtual_address - vma->vm_start |
| 23 | + agp->aperture.bus_base; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | pa = agp->ops->translate(agp, dma_addr); |
| 25 | |
Dave Jones | 6a92a4e | 2006-02-28 00:54:25 -0500 | [diff] [blame] | 26 | if (pa == (unsigned long)-EINVAL) |
Nick Piggin | 6d6f8d5 | 2008-02-04 22:30:04 -0800 | [diff] [blame] | 27 | return VM_FAULT_SIGBUS; /* no translation */ |
Dave Jones | 6a92a4e | 2006-02-28 00:54:25 -0500 | [diff] [blame] | 28 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | /* |
| 30 | * Get the page, inc the use count, and return it |
| 31 | */ |
| 32 | page = virt_to_page(__va(pa)); |
| 33 | get_page(page); |
Nick Piggin | 6d6f8d5 | 2008-02-04 22:30:04 -0800 | [diff] [blame] | 34 | vmf->page = page; |
| 35 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | } |
| 37 | |
| 38 | static struct aper_size_info_fixed alpha_core_agp_sizes[] = |
| 39 | { |
| 40 | { 0, 0, 0 }, /* filled in by alpha_core_agp_setup */ |
| 41 | }; |
| 42 | |
| 43 | struct vm_operations_struct alpha_core_agp_vm_ops = { |
Nick Piggin | 6d6f8d5 | 2008-02-04 22:30:04 -0800 | [diff] [blame] | 44 | .fault = alpha_core_agp_vm_fault, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | }; |
| 46 | |
| 47 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | static int alpha_core_agp_fetch_size(void) |
| 49 | { |
| 50 | return alpha_core_agp_sizes[0].size; |
| 51 | } |
| 52 | |
| 53 | static int alpha_core_agp_configure(void) |
| 54 | { |
| 55 | alpha_agp_info *agp = agp_bridge->dev_private_data; |
| 56 | agp_bridge->gart_bus_addr = agp->aperture.bus_base; |
| 57 | return 0; |
| 58 | } |
| 59 | |
| 60 | static void alpha_core_agp_cleanup(void) |
| 61 | { |
| 62 | alpha_agp_info *agp = agp_bridge->dev_private_data; |
| 63 | |
| 64 | agp->ops->cleanup(agp); |
| 65 | } |
| 66 | |
| 67 | static void alpha_core_agp_tlbflush(struct agp_memory *mem) |
| 68 | { |
| 69 | alpha_agp_info *agp = agp_bridge->dev_private_data; |
| 70 | alpha_mv.mv_pci_tbi(agp->hose, 0, -1); |
| 71 | } |
| 72 | |
| 73 | static void alpha_core_agp_enable(struct agp_bridge_data *bridge, u32 mode) |
| 74 | { |
| 75 | alpha_agp_info *agp = bridge->dev_private_data; |
| 76 | |
| 77 | agp->mode.lw = agp_collect_device_status(bridge, mode, |
| 78 | agp->capability.lw); |
| 79 | |
| 80 | agp->mode.bits.enable = 1; |
| 81 | agp->ops->configure(agp); |
| 82 | |
| 83 | agp_device_command(agp->mode.lw, 0); |
| 84 | } |
| 85 | |
Dave Jones | 6a92a4e | 2006-02-28 00:54:25 -0500 | [diff] [blame] | 86 | static int alpha_core_agp_insert_memory(struct agp_memory *mem, off_t pg_start, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | int type) |
| 88 | { |
| 89 | alpha_agp_info *agp = agp_bridge->dev_private_data; |
| 90 | int num_entries, status; |
| 91 | void *temp; |
| 92 | |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 93 | if (type >= AGP_USER_TYPES || mem->type >= AGP_USER_TYPES) |
| 94 | return -EINVAL; |
| 95 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | temp = agp_bridge->current_size; |
| 97 | num_entries = A_SIZE_FIX(temp)->num_entries; |
Dave Jones | 6a92a4e | 2006-02-28 00:54:25 -0500 | [diff] [blame] | 98 | if ((pg_start + mem->page_count) > num_entries) |
| 99 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | |
| 101 | status = agp->ops->bind(agp, pg_start, mem); |
| 102 | mb(); |
| 103 | alpha_core_agp_tlbflush(mem); |
| 104 | |
| 105 | return status; |
| 106 | } |
| 107 | |
Dave Jones | 6a92a4e | 2006-02-28 00:54:25 -0500 | [diff] [blame] | 108 | static int alpha_core_agp_remove_memory(struct agp_memory *mem, off_t pg_start, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | int type) |
| 110 | { |
| 111 | alpha_agp_info *agp = agp_bridge->dev_private_data; |
| 112 | int status; |
| 113 | |
| 114 | status = agp->ops->unbind(agp, pg_start, mem); |
| 115 | alpha_core_agp_tlbflush(mem); |
| 116 | return status; |
| 117 | } |
| 118 | |
Andrew Morton | 81c2466 | 2006-06-01 20:19:36 -0700 | [diff] [blame] | 119 | static int alpha_core_agp_create_free_gatt_table(struct agp_bridge_data *a) |
| 120 | { |
| 121 | return 0; |
| 122 | } |
| 123 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | struct agp_bridge_driver alpha_core_agp_driver = { |
| 125 | .owner = THIS_MODULE, |
| 126 | .aperture_sizes = alpha_core_agp_sizes, |
| 127 | .num_aperture_sizes = 1, |
| 128 | .size_type = FIXED_APER_SIZE, |
| 129 | .cant_use_aperture = 1, |
| 130 | .masks = NULL, |
Dave Jones | 6a92a4e | 2006-02-28 00:54:25 -0500 | [diff] [blame] | 131 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | .fetch_size = alpha_core_agp_fetch_size, |
| 133 | .configure = alpha_core_agp_configure, |
| 134 | .agp_enable = alpha_core_agp_enable, |
| 135 | .cleanup = alpha_core_agp_cleanup, |
| 136 | .tlb_flush = alpha_core_agp_tlbflush, |
| 137 | .mask_memory = agp_generic_mask_memory, |
| 138 | .cache_flush = global_cache_flush, |
Andrew Morton | 81c2466 | 2006-06-01 20:19:36 -0700 | [diff] [blame] | 139 | .create_gatt_table = alpha_core_agp_create_free_gatt_table, |
| 140 | .free_gatt_table = alpha_core_agp_create_free_gatt_table, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | .insert_memory = alpha_core_agp_insert_memory, |
| 142 | .remove_memory = alpha_core_agp_remove_memory, |
| 143 | .alloc_by_type = agp_generic_alloc_by_type, |
| 144 | .free_by_type = agp_generic_free_by_type, |
| 145 | .agp_alloc_page = agp_generic_alloc_page, |
| 146 | .agp_destroy_page = agp_generic_destroy_page, |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 147 | .agp_type_to_mask_type = agp_generic_type_to_mask_type, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | }; |
| 149 | |
| 150 | struct agp_bridge_data *alpha_bridge; |
| 151 | |
| 152 | int __init |
| 153 | alpha_core_agp_setup(void) |
| 154 | { |
| 155 | alpha_agp_info *agp = alpha_mv.agp_info(); |
| 156 | struct pci_dev *pdev; /* faked */ |
| 157 | struct aper_size_info_fixed *aper_size; |
| 158 | |
| 159 | if (!agp) |
| 160 | return -ENODEV; |
| 161 | if (agp->ops->setup(agp)) |
| 162 | return -ENODEV; |
| 163 | |
| 164 | /* |
| 165 | * Build the aperture size descriptor |
| 166 | */ |
| 167 | aper_size = alpha_core_agp_sizes; |
| 168 | aper_size->size = agp->aperture.size / (1024 * 1024); |
| 169 | aper_size->num_entries = agp->aperture.size / PAGE_SIZE; |
| 170 | aper_size->page_order = __ffs(aper_size->num_entries / 1024); |
| 171 | |
| 172 | /* |
| 173 | * Build a fake pci_dev struct |
| 174 | */ |
Michael Ellerman | bab41e9 | 2007-04-05 17:19:09 +1000 | [diff] [blame] | 175 | pdev = alloc_pci_dev(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | if (!pdev) |
| 177 | return -ENOMEM; |
| 178 | pdev->vendor = 0xffff; |
| 179 | pdev->device = 0xffff; |
| 180 | pdev->sysdata = agp->hose; |
| 181 | |
| 182 | alpha_bridge = agp_alloc_bridge(); |
| 183 | if (!alpha_bridge) |
| 184 | goto fail; |
| 185 | |
| 186 | alpha_bridge->driver = &alpha_core_agp_driver; |
| 187 | alpha_bridge->vm_ops = &alpha_core_agp_vm_ops; |
| 188 | alpha_bridge->current_size = aper_size; /* only 1 size */ |
| 189 | alpha_bridge->dev_private_data = agp; |
| 190 | alpha_bridge->dev = pdev; |
| 191 | alpha_bridge->mode = agp->capability.lw; |
| 192 | |
| 193 | printk(KERN_INFO PFX "Detected AGP on hose %d\n", agp->hose->index); |
| 194 | return agp_add_bridge(alpha_bridge); |
| 195 | |
| 196 | fail: |
| 197 | kfree(pdev); |
| 198 | return -ENOMEM; |
| 199 | } |
| 200 | |
| 201 | static int __init agp_alpha_core_init(void) |
| 202 | { |
| 203 | if (agp_off) |
| 204 | return -EINVAL; |
| 205 | if (alpha_mv.agp_info) |
| 206 | return alpha_core_agp_setup(); |
| 207 | return -ENODEV; |
| 208 | } |
| 209 | |
| 210 | static void __exit agp_alpha_core_cleanup(void) |
| 211 | { |
| 212 | agp_remove_bridge(alpha_bridge); |
| 213 | agp_put_bridge(alpha_bridge); |
| 214 | } |
| 215 | |
| 216 | module_init(agp_alpha_core_init); |
| 217 | module_exit(agp_alpha_core_cleanup); |
| 218 | |
| 219 | MODULE_AUTHOR("Jeff Wiedemeier <Jeff.Wiedemeier@hp.com>"); |
| 220 | MODULE_LICENSE("GPL and additional rights"); |