Olivier Galibert | b786739 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 1 | /* |
| 2 | * mmconfig-shared.c - Low-level direct PCI config space access via |
| 3 | * MMCONFIG - common code between i386 and x86-64. |
| 4 | * |
| 5 | * This code does: |
Olivier Galibert | 9358c69 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 6 | * - known chipset handling |
Olivier Galibert | b786739 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 7 | * - ACPI decoding and validation |
| 8 | * |
| 9 | * Per-architecture code takes care of the mappings and accesses |
| 10 | * themselves. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/pci.h> |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/acpi.h> |
Feng Tang | 5f0db7a | 2009-08-14 15:37:50 -0400 | [diff] [blame] | 16 | #include <linux/sfi_acpi.h> |
Olivier Galibert | b786739 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 17 | #include <linux/bitmap.h> |
Bjorn Helgaas | 9a08f7d | 2009-10-23 15:20:33 -0600 | [diff] [blame] | 18 | #include <linux/dmi.h> |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 19 | #include <linux/sort.h> |
Olivier Galibert | b786739 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 20 | #include <asm/e820.h> |
Jaswinder Singh Rajput | 8248771 | 2008-12-27 18:32:28 +0530 | [diff] [blame] | 21 | #include <asm/pci_x86.h> |
Feng Tang | 5f0db7a | 2009-08-14 15:37:50 -0400 | [diff] [blame] | 22 | #include <asm/acpi.h> |
Olivier Galibert | b786739 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 23 | |
Len Brown | f4a2d58 | 2009-07-28 16:48:02 -0400 | [diff] [blame] | 24 | #define PREFIX "PCI: " |
Len Brown | a192a95 | 2009-07-28 16:45:54 -0400 | [diff] [blame] | 25 | |
Aaron Durbin | a5ba797 | 2007-07-21 17:10:34 +0200 | [diff] [blame] | 26 | /* Indicate if the mmcfg resources have been placed into the resource table. */ |
| 27 | static int __initdata pci_mmcfg_resources_inserted; |
| 28 | |
Bjorn Helgaas | 7da7d36 | 2009-11-13 17:33:53 -0700 | [diff] [blame] | 29 | static __init void free_all_mmcfg(void) |
| 30 | { |
Bjorn Helgaas | 56ddf4d | 2009-11-13 17:34:29 -0700 | [diff] [blame] | 31 | int i; |
| 32 | struct pci_mmcfg_region *cfg; |
| 33 | |
Bjorn Helgaas | 7da7d36 | 2009-11-13 17:33:53 -0700 | [diff] [blame] | 34 | pci_mmcfg_arch_free(); |
Bjorn Helgaas | 56ddf4d | 2009-11-13 17:34:29 -0700 | [diff] [blame] | 35 | for (i = 0; i < pci_mmcfg_config_num; i++) { |
| 36 | cfg = &pci_mmcfg_config[i]; |
| 37 | if (cfg->res.parent) |
| 38 | release_resource(&cfg->res); |
| 39 | } |
Bjorn Helgaas | 7da7d36 | 2009-11-13 17:33:53 -0700 | [diff] [blame] | 40 | pci_mmcfg_config_num = 0; |
| 41 | kfree(pci_mmcfg_config); |
| 42 | pci_mmcfg_config = NULL; |
| 43 | } |
| 44 | |
Bjorn Helgaas | d215a9c | 2009-11-13 17:34:13 -0700 | [diff] [blame] | 45 | static __init struct pci_mmcfg_region *pci_mmconfig_add(int segment, int start, |
| 46 | int end, u64 addr) |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 47 | { |
Bjorn Helgaas | d215a9c | 2009-11-13 17:34:13 -0700 | [diff] [blame] | 48 | struct pci_mmcfg_region *new; |
Bjorn Helgaas | 7da7d36 | 2009-11-13 17:33:53 -0700 | [diff] [blame] | 49 | int new_num = pci_mmcfg_config_num + 1; |
| 50 | int i = pci_mmcfg_config_num; |
Bjorn Helgaas | 56ddf4d | 2009-11-13 17:34:29 -0700 | [diff] [blame] | 51 | int num_buses; |
| 52 | struct resource *res; |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 53 | |
Bjorn Helgaas | f7ca698 | 2009-11-13 17:34:03 -0700 | [diff] [blame] | 54 | if (addr == 0) |
| 55 | return NULL; |
| 56 | |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 57 | new = kzalloc(sizeof(pci_mmcfg_config[0]) * new_num, GFP_KERNEL); |
| 58 | if (!new) |
Bjorn Helgaas | 7da7d36 | 2009-11-13 17:33:53 -0700 | [diff] [blame] | 59 | return NULL; |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 60 | |
| 61 | if (pci_mmcfg_config) { |
| 62 | memcpy(new, pci_mmcfg_config, |
| 63 | sizeof(pci_mmcfg_config[0]) * new_num); |
| 64 | kfree(pci_mmcfg_config); |
| 65 | } |
| 66 | pci_mmcfg_config = new; |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 67 | pci_mmcfg_config_num++; |
Bjorn Helgaas | 95cf1cf | 2009-11-13 17:34:24 -0700 | [diff] [blame] | 68 | |
| 69 | new = &pci_mmcfg_config[i]; |
| 70 | |
| 71 | new->address = addr; |
| 72 | new->segment = segment; |
| 73 | new->start_bus = start; |
| 74 | new->end_bus = end; |
Bjorn Helgaas | 7da7d36 | 2009-11-13 17:33:53 -0700 | [diff] [blame] | 75 | |
Bjorn Helgaas | 56ddf4d | 2009-11-13 17:34:29 -0700 | [diff] [blame] | 76 | num_buses = end - start + 1; |
| 77 | res = &new->res; |
| 78 | res->start = addr + PCI_MMCFG_BUS_OFFSET(start); |
| 79 | res->end = addr + PCI_MMCFG_BUS_OFFSET(num_buses) - 1; |
| 80 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; |
| 81 | snprintf(new->name, PCI_MMCFG_RESOURCE_NAME_LEN, |
| 82 | "PCI MMCONFIG %04x [bus %02x-%02x]", segment, start, end); |
| 83 | res->name = new->name; |
| 84 | |
Bjorn Helgaas | 7da7d36 | 2009-11-13 17:33:53 -0700 | [diff] [blame] | 85 | return &pci_mmcfg_config[i]; |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 86 | } |
| 87 | |
OGAWA Hirofumi | 429d512 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 88 | static const char __init *pci_mmcfg_e7520(void) |
Olivier Galibert | 9358c69 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 89 | { |
| 90 | u32 win; |
Yinghai Lu | bb63b42 | 2008-02-28 23:56:50 -0800 | [diff] [blame] | 91 | raw_pci_ops->read(0, 0, PCI_DEVFN(0, 0), 0xce, 2, &win); |
Olivier Galibert | 9358c69 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 92 | |
Olivier Galibert | b5229db | 2007-05-02 19:27:22 +0200 | [diff] [blame] | 93 | win = win & 0xf000; |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 94 | if (win == 0x0000 || win == 0xf000) |
| 95 | return NULL; |
| 96 | |
Bjorn Helgaas | 7da7d36 | 2009-11-13 17:33:53 -0700 | [diff] [blame] | 97 | if (pci_mmconfig_add(0, 0, 255, win << 16) == NULL) |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 98 | return NULL; |
| 99 | |
Olivier Galibert | 9358c69 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 100 | return "Intel Corporation E7520 Memory Controller Hub"; |
| 101 | } |
| 102 | |
OGAWA Hirofumi | 429d512 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 103 | static const char __init *pci_mmcfg_intel_945(void) |
Olivier Galibert | 9358c69 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 104 | { |
| 105 | u32 pciexbar, mask = 0, len = 0; |
| 106 | |
Yinghai Lu | bb63b42 | 2008-02-28 23:56:50 -0800 | [diff] [blame] | 107 | raw_pci_ops->read(0, 0, PCI_DEVFN(0, 0), 0x48, 4, &pciexbar); |
Olivier Galibert | 9358c69 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 108 | |
| 109 | /* Enable bit */ |
| 110 | if (!(pciexbar & 1)) |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 111 | return NULL; |
Olivier Galibert | 9358c69 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 112 | |
| 113 | /* Size bits */ |
| 114 | switch ((pciexbar >> 1) & 3) { |
| 115 | case 0: |
| 116 | mask = 0xf0000000U; |
| 117 | len = 0x10000000U; |
| 118 | break; |
| 119 | case 1: |
| 120 | mask = 0xf8000000U; |
| 121 | len = 0x08000000U; |
| 122 | break; |
| 123 | case 2: |
| 124 | mask = 0xfc000000U; |
| 125 | len = 0x04000000U; |
| 126 | break; |
| 127 | default: |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 128 | return NULL; |
Olivier Galibert | 9358c69 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 129 | } |
| 130 | |
| 131 | /* Errata #2, things break when not aligned on a 256Mb boundary */ |
| 132 | /* Can only happen in 64M/128M mode */ |
| 133 | |
| 134 | if ((pciexbar & mask) & 0x0fffffffU) |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 135 | return NULL; |
Olivier Galibert | 9358c69 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 136 | |
Olivier Galibert | b5229db | 2007-05-02 19:27:22 +0200 | [diff] [blame] | 137 | /* Don't hit the APIC registers and their friends */ |
| 138 | if ((pciexbar & mask) >= 0xf0000000U) |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 139 | return NULL; |
Olivier Galibert | b5229db | 2007-05-02 19:27:22 +0200 | [diff] [blame] | 140 | |
Bjorn Helgaas | 7da7d36 | 2009-11-13 17:33:53 -0700 | [diff] [blame] | 141 | if (pci_mmconfig_add(0, 0, (len >> 20) - 1, pciexbar & mask) == NULL) |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 142 | return NULL; |
| 143 | |
Olivier Galibert | 9358c69 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 144 | return "Intel Corporation 945G/GZ/P/PL Express Memory Controller Hub"; |
| 145 | } |
| 146 | |
Yinghai Lu | 7fd0da4 | 2008-02-19 03:13:02 -0800 | [diff] [blame] | 147 | static const char __init *pci_mmcfg_amd_fam10h(void) |
| 148 | { |
| 149 | u32 low, high, address; |
| 150 | u64 base, msr; |
| 151 | int i; |
Bjorn Helgaas | 7da7d36 | 2009-11-13 17:33:53 -0700 | [diff] [blame] | 152 | unsigned segnbits = 0, busnbits, end_bus; |
Yinghai Lu | 7fd0da4 | 2008-02-19 03:13:02 -0800 | [diff] [blame] | 153 | |
Yinghai Lu | 5f0b297 | 2008-04-14 16:08:25 -0700 | [diff] [blame] | 154 | if (!(pci_probe & PCI_CHECK_ENABLE_AMD_MMCONF)) |
| 155 | return NULL; |
| 156 | |
Yinghai Lu | 7fd0da4 | 2008-02-19 03:13:02 -0800 | [diff] [blame] | 157 | address = MSR_FAM10H_MMIO_CONF_BASE; |
| 158 | if (rdmsr_safe(address, &low, &high)) |
| 159 | return NULL; |
| 160 | |
| 161 | msr = high; |
| 162 | msr <<= 32; |
| 163 | msr |= low; |
| 164 | |
| 165 | /* mmconfig is not enable */ |
| 166 | if (!(msr & FAM10H_MMIO_CONF_ENABLE)) |
| 167 | return NULL; |
| 168 | |
| 169 | base = msr & (FAM10H_MMIO_CONF_BASE_MASK<<FAM10H_MMIO_CONF_BASE_SHIFT); |
| 170 | |
| 171 | busnbits = (msr >> FAM10H_MMIO_CONF_BUSRANGE_SHIFT) & |
| 172 | FAM10H_MMIO_CONF_BUSRANGE_MASK; |
| 173 | |
| 174 | /* |
| 175 | * only handle bus 0 ? |
| 176 | * need to skip it |
| 177 | */ |
| 178 | if (!busnbits) |
| 179 | return NULL; |
| 180 | |
| 181 | if (busnbits > 8) { |
| 182 | segnbits = busnbits - 8; |
| 183 | busnbits = 8; |
| 184 | } |
| 185 | |
Bjorn Helgaas | 7da7d36 | 2009-11-13 17:33:53 -0700 | [diff] [blame] | 186 | end_bus = (1 << busnbits) - 1; |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 187 | for (i = 0; i < (1 << segnbits); i++) |
Bjorn Helgaas | 7da7d36 | 2009-11-13 17:33:53 -0700 | [diff] [blame] | 188 | if (pci_mmconfig_add(i, 0, end_bus, |
| 189 | base + (1<<28) * i) == NULL) { |
| 190 | free_all_mmcfg(); |
| 191 | return NULL; |
| 192 | } |
Yinghai Lu | 7fd0da4 | 2008-02-19 03:13:02 -0800 | [diff] [blame] | 193 | |
| 194 | return "AMD Family 10h NB"; |
| 195 | } |
| 196 | |
Ed Swierk | 5546d6f | 2009-03-19 20:57:56 -0700 | [diff] [blame] | 197 | static bool __initdata mcp55_checked; |
| 198 | static const char __init *pci_mmcfg_nvidia_mcp55(void) |
| 199 | { |
| 200 | int bus; |
| 201 | int mcp55_mmconf_found = 0; |
| 202 | |
| 203 | static const u32 extcfg_regnum = 0x90; |
| 204 | static const u32 extcfg_regsize = 4; |
| 205 | static const u32 extcfg_enable_mask = 1<<31; |
| 206 | static const u32 extcfg_start_mask = 0xff<<16; |
| 207 | static const int extcfg_start_shift = 16; |
| 208 | static const u32 extcfg_size_mask = 0x3<<28; |
| 209 | static const int extcfg_size_shift = 28; |
| 210 | static const int extcfg_sizebus[] = {0x100, 0x80, 0x40, 0x20}; |
| 211 | static const u32 extcfg_base_mask[] = {0x7ff8, 0x7ffc, 0x7ffe, 0x7fff}; |
| 212 | static const int extcfg_base_lshift = 25; |
| 213 | |
| 214 | /* |
| 215 | * do check if amd fam10h already took over |
| 216 | */ |
| 217 | if (!acpi_disabled || pci_mmcfg_config_num || mcp55_checked) |
| 218 | return NULL; |
| 219 | |
| 220 | mcp55_checked = true; |
| 221 | for (bus = 0; bus < 256; bus++) { |
| 222 | u64 base; |
| 223 | u32 l, extcfg; |
| 224 | u16 vendor, device; |
| 225 | int start, size_index, end; |
| 226 | |
| 227 | raw_pci_ops->read(0, bus, PCI_DEVFN(0, 0), 0, 4, &l); |
| 228 | vendor = l & 0xffff; |
| 229 | device = (l >> 16) & 0xffff; |
| 230 | |
| 231 | if (PCI_VENDOR_ID_NVIDIA != vendor || 0x0369 != device) |
| 232 | continue; |
| 233 | |
| 234 | raw_pci_ops->read(0, bus, PCI_DEVFN(0, 0), extcfg_regnum, |
| 235 | extcfg_regsize, &extcfg); |
| 236 | |
| 237 | if (!(extcfg & extcfg_enable_mask)) |
| 238 | continue; |
| 239 | |
Ed Swierk | 5546d6f | 2009-03-19 20:57:56 -0700 | [diff] [blame] | 240 | size_index = (extcfg & extcfg_size_mask) >> extcfg_size_shift; |
| 241 | base = extcfg & extcfg_base_mask[size_index]; |
| 242 | /* base could > 4G */ |
| 243 | base <<= extcfg_base_lshift; |
| 244 | start = (extcfg & extcfg_start_mask) >> extcfg_start_shift; |
| 245 | end = start + extcfg_sizebus[size_index] - 1; |
Bjorn Helgaas | 7da7d36 | 2009-11-13 17:33:53 -0700 | [diff] [blame] | 246 | if (pci_mmconfig_add(0, start, end, base) == NULL) |
| 247 | continue; |
Ed Swierk | 5546d6f | 2009-03-19 20:57:56 -0700 | [diff] [blame] | 248 | mcp55_mmconf_found++; |
| 249 | } |
| 250 | |
| 251 | if (!mcp55_mmconf_found) |
| 252 | return NULL; |
| 253 | |
| 254 | return "nVidia MCP55"; |
| 255 | } |
| 256 | |
Olivier Galibert | 9358c69 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 257 | struct pci_mmcfg_hostbridge_probe { |
Yinghai Lu | 7fd0da4 | 2008-02-19 03:13:02 -0800 | [diff] [blame] | 258 | u32 bus; |
| 259 | u32 devfn; |
Olivier Galibert | 9358c69 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 260 | u32 vendor; |
| 261 | u32 device; |
| 262 | const char *(*probe)(void); |
| 263 | }; |
| 264 | |
OGAWA Hirofumi | 429d512 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 265 | static struct pci_mmcfg_hostbridge_probe pci_mmcfg_probes[] __initdata = { |
Yinghai Lu | 7fd0da4 | 2008-02-19 03:13:02 -0800 | [diff] [blame] | 266 | { 0, PCI_DEVFN(0, 0), PCI_VENDOR_ID_INTEL, |
| 267 | PCI_DEVICE_ID_INTEL_E7520_MCH, pci_mmcfg_e7520 }, |
| 268 | { 0, PCI_DEVFN(0, 0), PCI_VENDOR_ID_INTEL, |
| 269 | PCI_DEVICE_ID_INTEL_82945G_HB, pci_mmcfg_intel_945 }, |
| 270 | { 0, PCI_DEVFN(0x18, 0), PCI_VENDOR_ID_AMD, |
| 271 | 0x1200, pci_mmcfg_amd_fam10h }, |
| 272 | { 0xff, PCI_DEVFN(0, 0), PCI_VENDOR_ID_AMD, |
| 273 | 0x1200, pci_mmcfg_amd_fam10h }, |
Ed Swierk | 5546d6f | 2009-03-19 20:57:56 -0700 | [diff] [blame] | 274 | { 0, PCI_DEVFN(0, 0), PCI_VENDOR_ID_NVIDIA, |
| 275 | 0x0369, pci_mmcfg_nvidia_mcp55 }, |
Olivier Galibert | 9358c69 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 276 | }; |
| 277 | |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 278 | static int __init cmp_mmcfg(const void *x1, const void *x2) |
| 279 | { |
Bjorn Helgaas | 987c367 | 2009-11-13 17:34:44 -0700 | [diff] [blame^] | 280 | const struct pci_mmcfg_region *m1 = x1; |
| 281 | const struct pci_mmcfg_region *m2 = x2; |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 282 | int start1, start2; |
| 283 | |
Bjorn Helgaas | d7e6b66 | 2009-11-13 17:34:18 -0700 | [diff] [blame] | 284 | start1 = m1->start_bus; |
| 285 | start2 = m2->start_bus; |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 286 | |
| 287 | return start1 - start2; |
| 288 | } |
| 289 | |
| 290 | static void __init pci_mmcfg_check_end_bus_number(void) |
| 291 | { |
| 292 | int i; |
Bjorn Helgaas | 987c367 | 2009-11-13 17:34:44 -0700 | [diff] [blame^] | 293 | struct pci_mmcfg_region *cfg, *cfgx; |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 294 | |
| 295 | /* sort them at first */ |
| 296 | sort(pci_mmcfg_config, pci_mmcfg_config_num, |
| 297 | sizeof(pci_mmcfg_config[0]), cmp_mmcfg, NULL); |
| 298 | |
| 299 | /* last one*/ |
| 300 | if (pci_mmcfg_config_num > 0) { |
| 301 | i = pci_mmcfg_config_num - 1; |
| 302 | cfg = &pci_mmcfg_config[i]; |
Bjorn Helgaas | d7e6b66 | 2009-11-13 17:34:18 -0700 | [diff] [blame] | 303 | if (cfg->end_bus < cfg->start_bus) |
| 304 | cfg->end_bus = 255; |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 305 | } |
| 306 | |
| 307 | /* don't overlap please */ |
| 308 | for (i = 0; i < pci_mmcfg_config_num - 1; i++) { |
| 309 | cfg = &pci_mmcfg_config[i]; |
| 310 | cfgx = &pci_mmcfg_config[i+1]; |
| 311 | |
Bjorn Helgaas | d7e6b66 | 2009-11-13 17:34:18 -0700 | [diff] [blame] | 312 | if (cfg->end_bus < cfg->start_bus) |
| 313 | cfg->end_bus = 255; |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 314 | |
Bjorn Helgaas | d7e6b66 | 2009-11-13 17:34:18 -0700 | [diff] [blame] | 315 | if (cfg->end_bus >= cfgx->start_bus) |
| 316 | cfg->end_bus = cfgx->start_bus - 1; |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 317 | } |
| 318 | } |
| 319 | |
Olivier Galibert | 9358c69 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 320 | static int __init pci_mmcfg_check_hostbridge(void) |
| 321 | { |
| 322 | u32 l; |
Yinghai Lu | 7fd0da4 | 2008-02-19 03:13:02 -0800 | [diff] [blame] | 323 | u32 bus, devfn; |
Olivier Galibert | 9358c69 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 324 | u16 vendor, device; |
| 325 | int i; |
| 326 | const char *name; |
| 327 | |
Yinghai Lu | bb63b42 | 2008-02-28 23:56:50 -0800 | [diff] [blame] | 328 | if (!raw_pci_ops) |
| 329 | return 0; |
| 330 | |
Bjorn Helgaas | 7da7d36 | 2009-11-13 17:33:53 -0700 | [diff] [blame] | 331 | free_all_mmcfg(); |
Olivier Galibert | 9358c69 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 332 | |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 333 | for (i = 0; i < ARRAY_SIZE(pci_mmcfg_probes); i++) { |
Yinghai Lu | 7fd0da4 | 2008-02-19 03:13:02 -0800 | [diff] [blame] | 334 | bus = pci_mmcfg_probes[i].bus; |
| 335 | devfn = pci_mmcfg_probes[i].devfn; |
Yinghai Lu | bb63b42 | 2008-02-28 23:56:50 -0800 | [diff] [blame] | 336 | raw_pci_ops->read(0, bus, devfn, 0, 4, &l); |
Yinghai Lu | 7fd0da4 | 2008-02-19 03:13:02 -0800 | [diff] [blame] | 337 | vendor = l & 0xffff; |
| 338 | device = (l >> 16) & 0xffff; |
| 339 | |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 340 | name = NULL; |
OGAWA Hirofumi | 429d512 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 341 | if (pci_mmcfg_probes[i].vendor == vendor && |
| 342 | pci_mmcfg_probes[i].device == device) |
Olivier Galibert | 9358c69 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 343 | name = pci_mmcfg_probes[i].probe(); |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 344 | |
| 345 | if (name) |
| 346 | printk(KERN_INFO "PCI: Found %s with MMCONFIG support.\n", |
| 347 | name); |
OGAWA Hirofumi | 429d512 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 348 | } |
Olivier Galibert | 9358c69 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 349 | |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 350 | /* some end_bus_number is crazy, fix it */ |
| 351 | pci_mmcfg_check_end_bus_number(); |
Olivier Galibert | 9358c69 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 352 | |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 353 | return pci_mmcfg_config_num != 0; |
Olivier Galibert | 9358c69 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 354 | } |
| 355 | |
Yinghai Lu | ebd60cd | 2008-09-04 21:04:32 +0200 | [diff] [blame] | 356 | static void __init pci_mmcfg_insert_resources(void) |
Olivier Galibert | 6a0668f | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 357 | { |
Olivier Galibert | 6a0668f | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 358 | int i; |
Bjorn Helgaas | 56ddf4d | 2009-11-13 17:34:29 -0700 | [diff] [blame] | 359 | struct pci_mmcfg_region *cfg; |
Olivier Galibert | 6a0668f | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 360 | |
Bjorn Helgaas | 56ddf4d | 2009-11-13 17:34:29 -0700 | [diff] [blame] | 361 | for (i = 0; i < pci_mmcfg_config_num; i++) { |
| 362 | cfg = &pci_mmcfg_config[i]; |
| 363 | insert_resource(&iomem_resource, &cfg->res); |
Olivier Galibert | 6a0668f | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 364 | } |
Aaron Durbin | a5ba797 | 2007-07-21 17:10:34 +0200 | [diff] [blame] | 365 | |
| 366 | /* Mark that the resources have been inserted. */ |
| 367 | pci_mmcfg_resources_inserted = 1; |
Olivier Galibert | 6a0668f | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 368 | } |
| 369 | |
Robert Hancock | 7752d5c | 2008-02-15 01:27:20 -0800 | [diff] [blame] | 370 | static acpi_status __init check_mcfg_resource(struct acpi_resource *res, |
| 371 | void *data) |
| 372 | { |
| 373 | struct resource *mcfg_res = data; |
| 374 | struct acpi_resource_address64 address; |
| 375 | acpi_status status; |
| 376 | |
| 377 | if (res->type == ACPI_RESOURCE_TYPE_FIXED_MEMORY32) { |
| 378 | struct acpi_resource_fixed_memory32 *fixmem32 = |
| 379 | &res->data.fixed_memory32; |
| 380 | if (!fixmem32) |
| 381 | return AE_OK; |
| 382 | if ((mcfg_res->start >= fixmem32->address) && |
Yinghai Lu | 75e613c | 2009-06-03 00:13:13 -0700 | [diff] [blame] | 383 | (mcfg_res->end < (fixmem32->address + |
Robert Hancock | 7752d5c | 2008-02-15 01:27:20 -0800 | [diff] [blame] | 384 | fixmem32->address_length))) { |
| 385 | mcfg_res->flags = 1; |
| 386 | return AE_CTRL_TERMINATE; |
| 387 | } |
| 388 | } |
| 389 | if ((res->type != ACPI_RESOURCE_TYPE_ADDRESS32) && |
| 390 | (res->type != ACPI_RESOURCE_TYPE_ADDRESS64)) |
| 391 | return AE_OK; |
| 392 | |
| 393 | status = acpi_resource_to_address64(res, &address); |
| 394 | if (ACPI_FAILURE(status) || |
| 395 | (address.address_length <= 0) || |
| 396 | (address.resource_type != ACPI_MEMORY_RANGE)) |
| 397 | return AE_OK; |
| 398 | |
| 399 | if ((mcfg_res->start >= address.minimum) && |
Yinghai Lu | 75e613c | 2009-06-03 00:13:13 -0700 | [diff] [blame] | 400 | (mcfg_res->end < (address.minimum + address.address_length))) { |
Robert Hancock | 7752d5c | 2008-02-15 01:27:20 -0800 | [diff] [blame] | 401 | mcfg_res->flags = 1; |
| 402 | return AE_CTRL_TERMINATE; |
| 403 | } |
| 404 | return AE_OK; |
| 405 | } |
| 406 | |
| 407 | static acpi_status __init find_mboard_resource(acpi_handle handle, u32 lvl, |
| 408 | void *context, void **rv) |
| 409 | { |
| 410 | struct resource *mcfg_res = context; |
| 411 | |
| 412 | acpi_walk_resources(handle, METHOD_NAME__CRS, |
| 413 | check_mcfg_resource, context); |
| 414 | |
| 415 | if (mcfg_res->flags) |
| 416 | return AE_CTRL_TERMINATE; |
| 417 | |
| 418 | return AE_OK; |
| 419 | } |
| 420 | |
Yinghai Lu | a83fe32 | 2008-07-18 13:22:36 -0700 | [diff] [blame] | 421 | static int __init is_acpi_reserved(u64 start, u64 end, unsigned not_used) |
Robert Hancock | 7752d5c | 2008-02-15 01:27:20 -0800 | [diff] [blame] | 422 | { |
| 423 | struct resource mcfg_res; |
| 424 | |
| 425 | mcfg_res.start = start; |
Yinghai Lu | 75e613c | 2009-06-03 00:13:13 -0700 | [diff] [blame] | 426 | mcfg_res.end = end - 1; |
Robert Hancock | 7752d5c | 2008-02-15 01:27:20 -0800 | [diff] [blame] | 427 | mcfg_res.flags = 0; |
| 428 | |
| 429 | acpi_get_devices("PNP0C01", find_mboard_resource, &mcfg_res, NULL); |
| 430 | |
| 431 | if (!mcfg_res.flags) |
| 432 | acpi_get_devices("PNP0C02", find_mboard_resource, &mcfg_res, |
| 433 | NULL); |
| 434 | |
| 435 | return mcfg_res.flags; |
| 436 | } |
| 437 | |
Yinghai Lu | a83fe32 | 2008-07-18 13:22:36 -0700 | [diff] [blame] | 438 | typedef int (*check_reserved_t)(u64 start, u64 end, unsigned type); |
| 439 | |
| 440 | static int __init is_mmconf_reserved(check_reserved_t is_reserved, |
Bjorn Helgaas | 987c367 | 2009-11-13 17:34:44 -0700 | [diff] [blame^] | 441 | int i, struct pci_mmcfg_region *cfg, int with_e820) |
Yinghai Lu | a83fe32 | 2008-07-18 13:22:36 -0700 | [diff] [blame] | 442 | { |
Bjorn Helgaas | 2f2a8b9 | 2009-11-13 17:34:34 -0700 | [diff] [blame] | 443 | u64 addr = cfg->res.start; |
| 444 | u64 size = resource_size(&cfg->res); |
Yinghai Lu | a83fe32 | 2008-07-18 13:22:36 -0700 | [diff] [blame] | 445 | u64 old_size = size; |
Bjorn Helgaas | 56ddf4d | 2009-11-13 17:34:29 -0700 | [diff] [blame] | 446 | int valid = 0, num_buses; |
Yinghai Lu | a83fe32 | 2008-07-18 13:22:36 -0700 | [diff] [blame] | 447 | |
Yinghai Lu | 044cd80 | 2009-04-18 01:43:46 -0700 | [diff] [blame] | 448 | while (!is_reserved(addr, addr + size, E820_RESERVED)) { |
Yinghai Lu | a83fe32 | 2008-07-18 13:22:36 -0700 | [diff] [blame] | 449 | size >>= 1; |
| 450 | if (size < (16UL<<20)) |
| 451 | break; |
| 452 | } |
| 453 | |
| 454 | if (size >= (16UL<<20) || size == old_size) { |
| 455 | printk(KERN_NOTICE |
| 456 | "PCI: MCFG area at %Lx reserved in %s\n", |
| 457 | addr, with_e820?"E820":"ACPI motherboard resources"); |
| 458 | valid = 1; |
| 459 | |
| 460 | if (old_size != size) { |
Bjorn Helgaas | d7e6b66 | 2009-11-13 17:34:18 -0700 | [diff] [blame] | 461 | /* update end_bus */ |
| 462 | cfg->end_bus = cfg->start_bus + ((size>>20) - 1); |
Bjorn Helgaas | 56ddf4d | 2009-11-13 17:34:29 -0700 | [diff] [blame] | 463 | num_buses = cfg->end_bus - cfg->start_bus + 1; |
| 464 | cfg->res.end = cfg->res.start + |
| 465 | PCI_MMCFG_BUS_OFFSET(num_buses) - 1; |
| 466 | snprintf(cfg->name, PCI_MMCFG_RESOURCE_NAME_LEN, |
| 467 | "PCI MMCONFIG %04x [bus %02x-%02x]", |
| 468 | cfg->segment, cfg->start_bus, cfg->end_bus); |
Yinghai Lu | a83fe32 | 2008-07-18 13:22:36 -0700 | [diff] [blame] | 469 | printk(KERN_NOTICE "PCI: updated MCFG configuration %d: base %lx " |
| 470 | "segment %hu buses %u - %u\n", |
Bjorn Helgaas | d7e6b66 | 2009-11-13 17:34:18 -0700 | [diff] [blame] | 471 | i, (unsigned long)cfg->address, cfg->segment, |
| 472 | (unsigned int)cfg->start_bus, |
| 473 | (unsigned int)cfg->end_bus); |
Yinghai Lu | a83fe32 | 2008-07-18 13:22:36 -0700 | [diff] [blame] | 474 | } |
| 475 | } |
| 476 | |
| 477 | return valid; |
| 478 | } |
| 479 | |
Yinghai Lu | bb63b42 | 2008-02-28 23:56:50 -0800 | [diff] [blame] | 480 | static void __init pci_mmcfg_reject_broken(int early) |
OGAWA Hirofumi | 44de020 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 481 | { |
Bjorn Helgaas | 987c367 | 2009-11-13 17:34:44 -0700 | [diff] [blame^] | 482 | struct pci_mmcfg_region *cfg; |
Robert Hancock | 7752d5c | 2008-02-15 01:27:20 -0800 | [diff] [blame] | 483 | int i; |
OGAWA Hirofumi | 26054ed | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 484 | |
Bjorn Helgaas | f7ca698 | 2009-11-13 17:34:03 -0700 | [diff] [blame] | 485 | if (pci_mmcfg_config_num == 0) |
OGAWA Hirofumi | 26054ed | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 486 | return; |
| 487 | |
Robert Hancock | 7752d5c | 2008-02-15 01:27:20 -0800 | [diff] [blame] | 488 | for (i = 0; i < pci_mmcfg_config_num; i++) { |
Bjorn Helgaas | 56ddf4d | 2009-11-13 17:34:29 -0700 | [diff] [blame] | 489 | int valid = 0; |
Yinghai Lu | a83fe32 | 2008-07-18 13:22:36 -0700 | [diff] [blame] | 490 | |
Robert Hancock | 7752d5c | 2008-02-15 01:27:20 -0800 | [diff] [blame] | 491 | cfg = &pci_mmcfg_config[i]; |
Yinghai Lu | 05c58b8 | 2008-02-15 01:30:14 -0800 | [diff] [blame] | 492 | printk(KERN_NOTICE "PCI: MCFG configuration %d: base %lx " |
Robert Hancock | 7752d5c | 2008-02-15 01:27:20 -0800 | [diff] [blame] | 493 | "segment %hu buses %u - %u\n", |
Bjorn Helgaas | d7e6b66 | 2009-11-13 17:34:18 -0700 | [diff] [blame] | 494 | i, (unsigned long)cfg->address, cfg->segment, |
| 495 | (unsigned int)cfg->start_bus, |
| 496 | (unsigned int)cfg->end_bus); |
Yinghai Lu | 05c58b8 | 2008-02-15 01:30:14 -0800 | [diff] [blame] | 497 | |
Feng Tang | 5f0db7a | 2009-08-14 15:37:50 -0400 | [diff] [blame] | 498 | if (!early && !acpi_disabled) |
Bjorn Helgaas | 2f2a8b9 | 2009-11-13 17:34:34 -0700 | [diff] [blame] | 499 | valid = is_mmconf_reserved(is_acpi_reserved, i, cfg, 0); |
Yinghai Lu | 05c58b8 | 2008-02-15 01:30:14 -0800 | [diff] [blame] | 500 | |
| 501 | if (valid) |
| 502 | continue; |
| 503 | |
| 504 | if (!early) |
Robert Hancock | 7752d5c | 2008-02-15 01:27:20 -0800 | [diff] [blame] | 505 | printk(KERN_ERR "PCI: BIOS Bug: MCFG area at %Lx is not" |
| 506 | " reserved in ACPI motherboard resources\n", |
| 507 | cfg->address); |
Yinghai Lu | a83fe32 | 2008-07-18 13:22:36 -0700 | [diff] [blame] | 508 | |
Yinghai Lu | 05c58b8 | 2008-02-15 01:30:14 -0800 | [diff] [blame] | 509 | /* Don't try to do this check unless configuration |
Yinghai Lu | bb63b42 | 2008-02-28 23:56:50 -0800 | [diff] [blame] | 510 | type 1 is available. how about type 2 ?*/ |
Yinghai Lu | a83fe32 | 2008-07-18 13:22:36 -0700 | [diff] [blame] | 511 | if (raw_pci_ops) |
Bjorn Helgaas | 2f2a8b9 | 2009-11-13 17:34:34 -0700 | [diff] [blame] | 512 | valid = is_mmconf_reserved(e820_all_mapped, i, cfg, 1); |
Yinghai Lu | 05c58b8 | 2008-02-15 01:30:14 -0800 | [diff] [blame] | 513 | |
| 514 | if (!valid) |
| 515 | goto reject; |
OGAWA Hirofumi | 26054ed | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 516 | } |
Robert Hancock | 7752d5c | 2008-02-15 01:27:20 -0800 | [diff] [blame] | 517 | |
OGAWA Hirofumi | 26054ed | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 518 | return; |
| 519 | |
| 520 | reject: |
Dave Jones | ef31023 | 2008-08-14 15:07:03 -0400 | [diff] [blame] | 521 | printk(KERN_INFO "PCI: Not using MMCONFIG.\n"); |
Bjorn Helgaas | 7da7d36 | 2009-11-13 17:33:53 -0700 | [diff] [blame] | 522 | free_all_mmcfg(); |
OGAWA Hirofumi | 44de020 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 523 | } |
| 524 | |
Yinghai Lu | 05c58b8 | 2008-02-15 01:30:14 -0800 | [diff] [blame] | 525 | static int __initdata known_bridge; |
| 526 | |
Len Brown | c4bf2f3 | 2009-06-11 23:53:55 -0400 | [diff] [blame] | 527 | /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */ |
Bjorn Helgaas | d215a9c | 2009-11-13 17:34:13 -0700 | [diff] [blame] | 528 | struct pci_mmcfg_region *pci_mmcfg_config; |
Len Brown | c4bf2f3 | 2009-06-11 23:53:55 -0400 | [diff] [blame] | 529 | int pci_mmcfg_config_num; |
| 530 | |
Bjorn Helgaas | 9a08f7d | 2009-10-23 15:20:33 -0600 | [diff] [blame] | 531 | static int __init acpi_mcfg_check_entry(struct acpi_table_mcfg *mcfg, |
| 532 | struct acpi_mcfg_allocation *cfg) |
Len Brown | c4bf2f3 | 2009-06-11 23:53:55 -0400 | [diff] [blame] | 533 | { |
Bjorn Helgaas | 9a08f7d | 2009-10-23 15:20:33 -0600 | [diff] [blame] | 534 | int year; |
Len Brown | c4bf2f3 | 2009-06-11 23:53:55 -0400 | [diff] [blame] | 535 | |
Bjorn Helgaas | 9a08f7d | 2009-10-23 15:20:33 -0600 | [diff] [blame] | 536 | if (cfg->address < 0xFFFFFFFF) |
| 537 | return 0; |
| 538 | |
| 539 | if (!strcmp(mcfg->header.oem_id, "SGI")) |
| 540 | return 0; |
| 541 | |
| 542 | if (mcfg->header.revision >= 1) { |
| 543 | if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && |
| 544 | year >= 2010) |
| 545 | return 0; |
| 546 | } |
| 547 | |
| 548 | printk(KERN_ERR PREFIX "MCFG region for %04x:%02x-%02x at %#llx " |
| 549 | "is above 4GB, ignored\n", cfg->pci_segment, |
| 550 | cfg->start_bus_number, cfg->end_bus_number, cfg->address); |
| 551 | return -EINVAL; |
Len Brown | c4bf2f3 | 2009-06-11 23:53:55 -0400 | [diff] [blame] | 552 | } |
| 553 | |
| 554 | static int __init pci_parse_mcfg(struct acpi_table_header *header) |
| 555 | { |
| 556 | struct acpi_table_mcfg *mcfg; |
Bjorn Helgaas | d3578ef | 2009-11-13 17:33:47 -0700 | [diff] [blame] | 557 | struct acpi_mcfg_allocation *cfg_table, *cfg; |
Len Brown | c4bf2f3 | 2009-06-11 23:53:55 -0400 | [diff] [blame] | 558 | unsigned long i; |
Bjorn Helgaas | 7da7d36 | 2009-11-13 17:33:53 -0700 | [diff] [blame] | 559 | int entries; |
Len Brown | c4bf2f3 | 2009-06-11 23:53:55 -0400 | [diff] [blame] | 560 | |
| 561 | if (!header) |
| 562 | return -EINVAL; |
| 563 | |
| 564 | mcfg = (struct acpi_table_mcfg *)header; |
| 565 | |
| 566 | /* how many config structures do we have */ |
Bjorn Helgaas | 7da7d36 | 2009-11-13 17:33:53 -0700 | [diff] [blame] | 567 | free_all_mmcfg(); |
Bjorn Helgaas | e823d6f | 2009-11-13 17:33:42 -0700 | [diff] [blame] | 568 | entries = 0; |
Len Brown | c4bf2f3 | 2009-06-11 23:53:55 -0400 | [diff] [blame] | 569 | i = header->length - sizeof(struct acpi_table_mcfg); |
| 570 | while (i >= sizeof(struct acpi_mcfg_allocation)) { |
Bjorn Helgaas | e823d6f | 2009-11-13 17:33:42 -0700 | [diff] [blame] | 571 | entries++; |
Len Brown | c4bf2f3 | 2009-06-11 23:53:55 -0400 | [diff] [blame] | 572 | i -= sizeof(struct acpi_mcfg_allocation); |
| 573 | }; |
Bjorn Helgaas | e823d6f | 2009-11-13 17:33:42 -0700 | [diff] [blame] | 574 | if (entries == 0) { |
Len Brown | c4bf2f3 | 2009-06-11 23:53:55 -0400 | [diff] [blame] | 575 | printk(KERN_ERR PREFIX "MMCONFIG has no entries\n"); |
| 576 | return -ENODEV; |
| 577 | } |
| 578 | |
Bjorn Helgaas | d3578ef | 2009-11-13 17:33:47 -0700 | [diff] [blame] | 579 | cfg_table = (struct acpi_mcfg_allocation *) &mcfg[1]; |
Bjorn Helgaas | e823d6f | 2009-11-13 17:33:42 -0700 | [diff] [blame] | 580 | for (i = 0; i < entries; i++) { |
Bjorn Helgaas | d3578ef | 2009-11-13 17:33:47 -0700 | [diff] [blame] | 581 | cfg = &cfg_table[i]; |
| 582 | if (acpi_mcfg_check_entry(mcfg, cfg)) { |
Bjorn Helgaas | 7da7d36 | 2009-11-13 17:33:53 -0700 | [diff] [blame] | 583 | free_all_mmcfg(); |
Len Brown | c4bf2f3 | 2009-06-11 23:53:55 -0400 | [diff] [blame] | 584 | return -ENODEV; |
| 585 | } |
Bjorn Helgaas | 7da7d36 | 2009-11-13 17:33:53 -0700 | [diff] [blame] | 586 | |
| 587 | if (pci_mmconfig_add(cfg->pci_segment, cfg->start_bus_number, |
| 588 | cfg->end_bus_number, cfg->address) == NULL) { |
| 589 | printk(KERN_WARNING PREFIX |
| 590 | "no memory for MCFG entries\n"); |
| 591 | free_all_mmcfg(); |
| 592 | return -ENOMEM; |
| 593 | } |
Len Brown | c4bf2f3 | 2009-06-11 23:53:55 -0400 | [diff] [blame] | 594 | } |
| 595 | |
| 596 | return 0; |
| 597 | } |
| 598 | |
Thomas Gleixner | 968cbfa | 2008-05-12 15:43:37 +0200 | [diff] [blame] | 599 | static void __init __pci_mmcfg_init(int early) |
Olivier Galibert | b786739 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 600 | { |
Robert Hancock | 7752d5c | 2008-02-15 01:27:20 -0800 | [diff] [blame] | 601 | /* MMCONFIG disabled */ |
| 602 | if ((pci_probe & PCI_PROBE_MMCONF) == 0) |
| 603 | return; |
| 604 | |
| 605 | /* MMCONFIG already enabled */ |
Yinghai Lu | 05c58b8 | 2008-02-15 01:30:14 -0800 | [diff] [blame] | 606 | if (!early && !(pci_probe & PCI_PROBE_MASK & ~PCI_PROBE_MMCONF)) |
Robert Hancock | 7752d5c | 2008-02-15 01:27:20 -0800 | [diff] [blame] | 607 | return; |
| 608 | |
Yinghai Lu | 05c58b8 | 2008-02-15 01:30:14 -0800 | [diff] [blame] | 609 | /* for late to exit */ |
| 610 | if (known_bridge) |
| 611 | return; |
Robert Hancock | 7752d5c | 2008-02-15 01:27:20 -0800 | [diff] [blame] | 612 | |
Yinghai Lu | bb63b42 | 2008-02-28 23:56:50 -0800 | [diff] [blame] | 613 | if (early) { |
Yinghai Lu | 05c58b8 | 2008-02-15 01:30:14 -0800 | [diff] [blame] | 614 | if (pci_mmcfg_check_hostbridge()) |
| 615 | known_bridge = 1; |
| 616 | } |
| 617 | |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 618 | if (!known_bridge) |
Feng Tang | 5f0db7a | 2009-08-14 15:37:50 -0400 | [diff] [blame] | 619 | acpi_sfi_table_parse(ACPI_SIG_MCFG, pci_parse_mcfg); |
Yinghai Lu | 068258b | 2009-03-19 20:55:35 -0700 | [diff] [blame] | 620 | |
| 621 | pci_mmcfg_reject_broken(early); |
Olivier Galibert | b786739 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 622 | |
Bjorn Helgaas | f7ca698 | 2009-11-13 17:34:03 -0700 | [diff] [blame] | 623 | if (pci_mmcfg_config_num == 0) |
Olivier Galibert | b786739 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 624 | return; |
| 625 | |
Yinghai Lu | ebd60cd | 2008-09-04 21:04:32 +0200 | [diff] [blame] | 626 | if (pci_mmcfg_arch_init()) |
Olivier Galibert | b786739 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 627 | pci_probe = (pci_probe & ~PCI_PROBE_MASK) | PCI_PROBE_MMCONF; |
Yinghai Lu | ebd60cd | 2008-09-04 21:04:32 +0200 | [diff] [blame] | 628 | else { |
Aaron Durbin | a5ba797 | 2007-07-21 17:10:34 +0200 | [diff] [blame] | 629 | /* |
| 630 | * Signal not to attempt to insert mmcfg resources because |
| 631 | * the architecture mmcfg setup could not initialize. |
| 632 | */ |
| 633 | pci_mmcfg_resources_inserted = 1; |
Olivier Galibert | b786739 | 2007-02-13 13:26:20 +0100 | [diff] [blame] | 634 | } |
| 635 | } |
Aaron Durbin | a5ba797 | 2007-07-21 17:10:34 +0200 | [diff] [blame] | 636 | |
Yinghai Lu | bb63b42 | 2008-02-28 23:56:50 -0800 | [diff] [blame] | 637 | void __init pci_mmcfg_early_init(void) |
Yinghai Lu | 05c58b8 | 2008-02-15 01:30:14 -0800 | [diff] [blame] | 638 | { |
Yinghai Lu | bb63b42 | 2008-02-28 23:56:50 -0800 | [diff] [blame] | 639 | __pci_mmcfg_init(1); |
Yinghai Lu | 05c58b8 | 2008-02-15 01:30:14 -0800 | [diff] [blame] | 640 | } |
| 641 | |
| 642 | void __init pci_mmcfg_late_init(void) |
| 643 | { |
Yinghai Lu | bb63b42 | 2008-02-28 23:56:50 -0800 | [diff] [blame] | 644 | __pci_mmcfg_init(0); |
Yinghai Lu | 05c58b8 | 2008-02-15 01:30:14 -0800 | [diff] [blame] | 645 | } |
| 646 | |
Aaron Durbin | a5ba797 | 2007-07-21 17:10:34 +0200 | [diff] [blame] | 647 | static int __init pci_mmcfg_late_insert_resources(void) |
| 648 | { |
| 649 | /* |
| 650 | * If resources are already inserted or we are not using MMCONFIG, |
| 651 | * don't insert the resources. |
| 652 | */ |
| 653 | if ((pci_mmcfg_resources_inserted == 1) || |
| 654 | (pci_probe & PCI_PROBE_MMCONF) == 0 || |
Bjorn Helgaas | f7ca698 | 2009-11-13 17:34:03 -0700 | [diff] [blame] | 655 | (pci_mmcfg_config_num == 0)) |
Aaron Durbin | a5ba797 | 2007-07-21 17:10:34 +0200 | [diff] [blame] | 656 | return 1; |
| 657 | |
| 658 | /* |
| 659 | * Attempt to insert the mmcfg resources but not with the busy flag |
| 660 | * marked so it won't cause request errors when __request_region is |
| 661 | * called. |
| 662 | */ |
Yinghai Lu | ebd60cd | 2008-09-04 21:04:32 +0200 | [diff] [blame] | 663 | pci_mmcfg_insert_resources(); |
Aaron Durbin | a5ba797 | 2007-07-21 17:10:34 +0200 | [diff] [blame] | 664 | |
| 665 | return 0; |
| 666 | } |
| 667 | |
| 668 | /* |
| 669 | * Perform MMCONFIG resource insertion after PCI initialization to allow for |
| 670 | * misprogrammed MCFG tables that state larger sizes but actually conflict |
| 671 | * with other system resources. |
| 672 | */ |
| 673 | late_initcall(pci_mmcfg_late_insert_resources); |