Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 1 | /* |
| 2 | * Common pmac/prep/chrp pci routines. -- Cort |
| 3 | */ |
| 4 | |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 5 | #include <linux/kernel.h> |
| 6 | #include <linux/pci.h> |
| 7 | #include <linux/delay.h> |
| 8 | #include <linux/string.h> |
| 9 | #include <linux/init.h> |
| 10 | #include <linux/capability.h> |
| 11 | #include <linux/sched.h> |
| 12 | #include <linux/errno.h> |
| 13 | #include <linux/bootmem.h> |
Benjamin Herrenschmidt | 6e99e45 | 2006-07-10 04:44:42 -0700 | [diff] [blame] | 14 | #include <linux/irq.h> |
Benjamin Herrenschmidt | f90bb15 | 2006-11-11 17:24:51 +1100 | [diff] [blame] | 15 | #include <linux/list.h> |
Stephen Rothwell | 66524b2 | 2007-12-21 15:52:43 +1100 | [diff] [blame] | 16 | #include <linux/of.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 17 | #include <linux/slab.h> |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 18 | |
| 19 | #include <asm/processor.h> |
| 20 | #include <asm/io.h> |
| 21 | #include <asm/prom.h> |
| 22 | #include <asm/sections.h> |
| 23 | #include <asm/pci-bridge.h> |
Milton Miller | c3bd517 | 2009-01-08 02:19:46 +0000 | [diff] [blame] | 24 | #include <asm/ppc-pci.h> |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 25 | #include <asm/byteorder.h> |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 26 | #include <asm/uaccess.h> |
| 27 | #include <asm/machdep.h> |
| 28 | |
| 29 | #undef DEBUG |
| 30 | |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 31 | unsigned long isa_io_base = 0; |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 32 | unsigned long pci_dram_offset = 0; |
| 33 | int pcibios_assign_bus_offset = 1; |
| 34 | |
| 35 | void pcibios_make_OF_bus_map(void); |
| 36 | |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 37 | static void fixup_cpc710_pci64(struct pci_dev* dev); |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 38 | static u8* pci_to_OF_bus_map; |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 39 | |
| 40 | /* By default, we don't re-assign bus numbers. We do this only on |
| 41 | * some pmacs |
| 42 | */ |
Benjamin Herrenschmidt | fc3fb71 | 2007-12-20 14:54:46 +1100 | [diff] [blame] | 43 | static int pci_assign_all_buses; |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 44 | |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 45 | static int pci_bus_count; |
| 46 | |
Benjamin Herrenschmidt | 7b6b574 | 2008-10-13 17:51:46 +0000 | [diff] [blame] | 47 | /* This will remain NULL for now, until isa-bridge.c is made common |
| 48 | * to both 32-bit and 64-bit. |
| 49 | */ |
| 50 | struct pci_dev *isa_bridge_pcidev; |
| 51 | EXPORT_SYMBOL_GPL(isa_bridge_pcidev); |
| 52 | |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 53 | static void |
John Rigby | 4a015c3 | 2008-10-07 13:00:20 -0600 | [diff] [blame] | 54 | fixup_hide_host_resource_fsl(struct pci_dev *dev) |
Kumar Gala | 2052d6d | 2007-07-25 00:44:11 -0500 | [diff] [blame] | 55 | { |
| 56 | int i, class = dev->class >> 8; |
| 57 | |
John Rigby | 4a015c3 | 2008-10-07 13:00:20 -0600 | [diff] [blame] | 58 | if ((class == PCI_CLASS_PROCESSOR_POWERPC || |
| 59 | class == PCI_CLASS_BRIDGE_OTHER) && |
Kumar Gala | 2052d6d | 2007-07-25 00:44:11 -0500 | [diff] [blame] | 60 | (dev->hdr_type == PCI_HEADER_TYPE_NORMAL) && |
| 61 | (dev->bus->parent == NULL)) { |
| 62 | for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { |
| 63 | dev->resource[i].start = 0; |
| 64 | dev->resource[i].end = 0; |
| 65 | dev->resource[i].flags = 0; |
| 66 | } |
| 67 | } |
| 68 | } |
| 69 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MOTOROLA, PCI_ANY_ID, fixup_hide_host_resource_fsl); |
| 70 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID, fixup_hide_host_resource_fsl); |
| 71 | |
| 72 | static void |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 73 | fixup_cpc710_pci64(struct pci_dev* dev) |
| 74 | { |
| 75 | /* Hide the PCI64 BARs from the kernel as their content doesn't |
| 76 | * fit well in the resource management |
| 77 | */ |
| 78 | dev->resource[0].start = dev->resource[0].end = 0; |
| 79 | dev->resource[0].flags = 0; |
| 80 | dev->resource[1].start = dev->resource[1].end = 0; |
| 81 | dev->resource[1].flags = 0; |
| 82 | } |
| 83 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CPC710_PCI64, fixup_cpc710_pci64); |
| 84 | |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 85 | /* |
| 86 | * Functions below are used on OpenFirmware machines. |
| 87 | */ |
| 88 | static void |
| 89 | make_one_node_map(struct device_node* node, u8 pci_bus) |
| 90 | { |
Jeremy Kerr | a7f67bd | 2006-07-12 15:35:54 +1000 | [diff] [blame] | 91 | const int *bus_range; |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 92 | int len; |
| 93 | |
| 94 | if (pci_bus >= pci_bus_count) |
| 95 | return; |
Stephen Rothwell | e2eb639 | 2007-04-03 22:26:41 +1000 | [diff] [blame] | 96 | bus_range = of_get_property(node, "bus-range", &len); |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 97 | if (bus_range == NULL || len < 2 * sizeof(int)) { |
| 98 | printk(KERN_WARNING "Can't get bus-range for %s, " |
| 99 | "assuming it starts at 0\n", node->full_name); |
| 100 | pci_to_OF_bus_map[pci_bus] = 0; |
| 101 | } else |
| 102 | pci_to_OF_bus_map[pci_bus] = bus_range[0]; |
| 103 | |
Stephen Rothwell | 66524b2 | 2007-12-21 15:52:43 +1100 | [diff] [blame] | 104 | for_each_child_of_node(node, node) { |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 105 | struct pci_dev* dev; |
Jeremy Kerr | a7f67bd | 2006-07-12 15:35:54 +1000 | [diff] [blame] | 106 | const unsigned int *class_code, *reg; |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 107 | |
Stephen Rothwell | e2eb639 | 2007-04-03 22:26:41 +1000 | [diff] [blame] | 108 | class_code = of_get_property(node, "class-code", NULL); |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 109 | if (!class_code || ((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI && |
| 110 | (*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS)) |
| 111 | continue; |
Stephen Rothwell | e2eb639 | 2007-04-03 22:26:41 +1000 | [diff] [blame] | 112 | reg = of_get_property(node, "reg", NULL); |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 113 | if (!reg) |
| 114 | continue; |
Alan Cox | ab46276 | 2007-04-23 14:47:59 +0100 | [diff] [blame] | 115 | dev = pci_get_bus_and_slot(pci_bus, ((reg[0] >> 8) & 0xff)); |
| 116 | if (!dev || !dev->subordinate) { |
| 117 | pci_dev_put(dev); |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 118 | continue; |
Alan Cox | ab46276 | 2007-04-23 14:47:59 +0100 | [diff] [blame] | 119 | } |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 120 | make_one_node_map(node, dev->subordinate->number); |
Alan Cox | ab46276 | 2007-04-23 14:47:59 +0100 | [diff] [blame] | 121 | pci_dev_put(dev); |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 122 | } |
| 123 | } |
| 124 | |
| 125 | void |
| 126 | pcibios_make_OF_bus_map(void) |
| 127 | { |
| 128 | int i; |
Kumar Gala | a4c9e32 | 2007-06-27 13:09:43 -0500 | [diff] [blame] | 129 | struct pci_controller *hose, *tmp; |
Jeremy Kerr | a7f67bd | 2006-07-12 15:35:54 +1000 | [diff] [blame] | 130 | struct property *map_prop; |
Stephen Rothwell | 8c8dc32 | 2007-04-24 13:50:55 +1000 | [diff] [blame] | 131 | struct device_node *dn; |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 132 | |
Robert P. J. Day | 5cbded5 | 2006-12-13 00:35:56 -0800 | [diff] [blame] | 133 | pci_to_OF_bus_map = kmalloc(pci_bus_count, GFP_KERNEL); |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 134 | if (!pci_to_OF_bus_map) { |
| 135 | printk(KERN_ERR "Can't allocate OF bus map !\n"); |
| 136 | return; |
| 137 | } |
| 138 | |
| 139 | /* We fill the bus map with invalid values, that helps |
| 140 | * debugging. |
| 141 | */ |
| 142 | for (i=0; i<pci_bus_count; i++) |
| 143 | pci_to_OF_bus_map[i] = 0xff; |
| 144 | |
| 145 | /* For each hose, we begin searching bridges */ |
Kumar Gala | a4c9e32 | 2007-06-27 13:09:43 -0500 | [diff] [blame] | 146 | list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { |
Stephen Rothwell | 44ef339 | 2007-12-10 14:33:21 +1100 | [diff] [blame] | 147 | struct device_node* node = hose->dn; |
| 148 | |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 149 | if (!node) |
| 150 | continue; |
| 151 | make_one_node_map(node, hose->first_busno); |
| 152 | } |
Stephen Rothwell | 8c8dc32 | 2007-04-24 13:50:55 +1000 | [diff] [blame] | 153 | dn = of_find_node_by_path("/"); |
| 154 | map_prop = of_find_property(dn, "pci-OF-bus-map", NULL); |
Jeremy Kerr | a7f67bd | 2006-07-12 15:35:54 +1000 | [diff] [blame] | 155 | if (map_prop) { |
| 156 | BUG_ON(pci_bus_count > map_prop->length); |
| 157 | memcpy(map_prop->value, pci_to_OF_bus_map, pci_bus_count); |
| 158 | } |
Stephen Rothwell | 8c8dc32 | 2007-04-24 13:50:55 +1000 | [diff] [blame] | 159 | of_node_put(dn); |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 160 | #ifdef DEBUG |
| 161 | printk("PCI->OF bus map:\n"); |
| 162 | for (i=0; i<pci_bus_count; i++) { |
| 163 | if (pci_to_OF_bus_map[i] == 0xff) |
| 164 | continue; |
| 165 | printk("%d -> %d\n", i, pci_to_OF_bus_map[i]); |
| 166 | } |
| 167 | #endif |
| 168 | } |
| 169 | |
| 170 | typedef int (*pci_OF_scan_iterator)(struct device_node* node, void* data); |
| 171 | |
| 172 | static struct device_node* |
Stephen Rothwell | 66524b2 | 2007-12-21 15:52:43 +1100 | [diff] [blame] | 173 | scan_OF_pci_childs(struct device_node *parent, pci_OF_scan_iterator filter, void* data) |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 174 | { |
Stephen Rothwell | 66524b2 | 2007-12-21 15:52:43 +1100 | [diff] [blame] | 175 | struct device_node *node; |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 176 | struct device_node* sub_node; |
| 177 | |
Stephen Rothwell | 66524b2 | 2007-12-21 15:52:43 +1100 | [diff] [blame] | 178 | for_each_child_of_node(parent, node) { |
Jeremy Kerr | a7f67bd | 2006-07-12 15:35:54 +1000 | [diff] [blame] | 179 | const unsigned int *class_code; |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 180 | |
Stephen Rothwell | 66524b2 | 2007-12-21 15:52:43 +1100 | [diff] [blame] | 181 | if (filter(node, data)) { |
| 182 | of_node_put(node); |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 183 | return node; |
Stephen Rothwell | 66524b2 | 2007-12-21 15:52:43 +1100 | [diff] [blame] | 184 | } |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 185 | |
| 186 | /* For PCI<->PCI bridges or CardBus bridges, we go down |
| 187 | * Note: some OFs create a parent node "multifunc-device" as |
| 188 | * a fake root for all functions of a multi-function device, |
| 189 | * we go down them as well. |
| 190 | */ |
Stephen Rothwell | e2eb639 | 2007-04-03 22:26:41 +1000 | [diff] [blame] | 191 | class_code = of_get_property(node, "class-code", NULL); |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 192 | if ((!class_code || ((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI && |
| 193 | (*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS)) && |
| 194 | strcmp(node->name, "multifunc-device")) |
| 195 | continue; |
Stephen Rothwell | 66524b2 | 2007-12-21 15:52:43 +1100 | [diff] [blame] | 196 | sub_node = scan_OF_pci_childs(node, filter, data); |
| 197 | if (sub_node) { |
| 198 | of_node_put(node); |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 199 | return sub_node; |
Stephen Rothwell | 66524b2 | 2007-12-21 15:52:43 +1100 | [diff] [blame] | 200 | } |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 201 | } |
| 202 | return NULL; |
| 203 | } |
| 204 | |
Benjamin Herrenschmidt | dae4828 | 2006-12-11 14:09:07 +1100 | [diff] [blame] | 205 | static struct device_node *scan_OF_for_pci_dev(struct device_node *parent, |
| 206 | unsigned int devfn) |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 207 | { |
Tom Arbuckle | f817869 | 2009-02-11 10:41:48 +0000 | [diff] [blame] | 208 | struct device_node *np, *cnp; |
Benjamin Herrenschmidt | dae4828 | 2006-12-11 14:09:07 +1100 | [diff] [blame] | 209 | const u32 *reg; |
| 210 | unsigned int psize; |
| 211 | |
Stephen Rothwell | 85e99b9 | 2008-01-03 15:13:37 +1100 | [diff] [blame] | 212 | for_each_child_of_node(parent, np) { |
Stephen Rothwell | e2eb639 | 2007-04-03 22:26:41 +1000 | [diff] [blame] | 213 | reg = of_get_property(np, "reg", &psize); |
Tom Arbuckle | f817869 | 2009-02-11 10:41:48 +0000 | [diff] [blame] | 214 | if (reg && psize >= 4 && ((reg[0] >> 8) & 0xff) == devfn) |
Benjamin Herrenschmidt | dae4828 | 2006-12-11 14:09:07 +1100 | [diff] [blame] | 215 | return np; |
Tom Arbuckle | f817869 | 2009-02-11 10:41:48 +0000 | [diff] [blame] | 216 | |
| 217 | /* Note: some OFs create a parent node "multifunc-device" as |
| 218 | * a fake root for all functions of a multi-function device, |
| 219 | * we go down them as well. */ |
| 220 | if (!strcmp(np->name, "multifunc-device")) { |
| 221 | cnp = scan_OF_for_pci_dev(np, devfn); |
| 222 | if (cnp) |
| 223 | return cnp; |
| 224 | } |
Benjamin Herrenschmidt | dae4828 | 2006-12-11 14:09:07 +1100 | [diff] [blame] | 225 | } |
| 226 | return NULL; |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 227 | } |
| 228 | |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 229 | |
Benjamin Herrenschmidt | dae4828 | 2006-12-11 14:09:07 +1100 | [diff] [blame] | 230 | static struct device_node *scan_OF_for_pci_bus(struct pci_bus *bus) |
| 231 | { |
| 232 | struct device_node *parent, *np; |
| 233 | |
| 234 | /* Are we a root bus ? */ |
| 235 | if (bus->self == NULL || bus->parent == NULL) { |
Kumar Gala | 0b1d40c | 2007-06-27 10:27:33 -0500 | [diff] [blame] | 236 | struct pci_controller *hose = pci_bus_to_host(bus); |
Benjamin Herrenschmidt | dae4828 | 2006-12-11 14:09:07 +1100 | [diff] [blame] | 237 | if (hose == NULL) |
| 238 | return NULL; |
Stephen Rothwell | 44ef339 | 2007-12-10 14:33:21 +1100 | [diff] [blame] | 239 | return of_node_get(hose->dn); |
Benjamin Herrenschmidt | dae4828 | 2006-12-11 14:09:07 +1100 | [diff] [blame] | 240 | } |
| 241 | |
| 242 | /* not a root bus, we need to get our parent */ |
| 243 | parent = scan_OF_for_pci_bus(bus->parent); |
| 244 | if (parent == NULL) |
| 245 | return NULL; |
| 246 | |
| 247 | /* now iterate for children for a match */ |
| 248 | np = scan_OF_for_pci_dev(parent, bus->self->devfn); |
| 249 | of_node_put(parent); |
| 250 | |
Benjamin Herrenschmidt | dae4828 | 2006-12-11 14:09:07 +1100 | [diff] [blame] | 251 | return np; |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 252 | } |
| 253 | |
| 254 | /* |
| 255 | * Scans the OF tree for a device node matching a PCI device |
| 256 | */ |
| 257 | struct device_node * |
| 258 | pci_busdev_to_OF_node(struct pci_bus *bus, int devfn) |
| 259 | { |
Benjamin Herrenschmidt | dae4828 | 2006-12-11 14:09:07 +1100 | [diff] [blame] | 260 | struct device_node *parent, *np; |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 261 | |
Benjamin Herrenschmidt | b0494bc | 2008-10-27 19:48:22 +0000 | [diff] [blame] | 262 | pr_debug("pci_busdev_to_OF_node(%d,0x%x)\n", bus->number, devfn); |
Benjamin Herrenschmidt | dae4828 | 2006-12-11 14:09:07 +1100 | [diff] [blame] | 263 | parent = scan_OF_for_pci_bus(bus); |
| 264 | if (parent == NULL) |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 265 | return NULL; |
Benjamin Herrenschmidt | b0494bc | 2008-10-27 19:48:22 +0000 | [diff] [blame] | 266 | pr_debug(" parent is %s\n", parent ? parent->full_name : "<NULL>"); |
Benjamin Herrenschmidt | dae4828 | 2006-12-11 14:09:07 +1100 | [diff] [blame] | 267 | np = scan_OF_for_pci_dev(parent, devfn); |
| 268 | of_node_put(parent); |
Benjamin Herrenschmidt | b0494bc | 2008-10-27 19:48:22 +0000 | [diff] [blame] | 269 | pr_debug(" result is %s\n", np ? np->full_name : "<NULL>"); |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 270 | |
Benjamin Herrenschmidt | dae4828 | 2006-12-11 14:09:07 +1100 | [diff] [blame] | 271 | /* XXX most callers don't release the returned node |
| 272 | * mostly because ppc64 doesn't increase the refcount, |
| 273 | * we need to fix that. |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 274 | */ |
Benjamin Herrenschmidt | dae4828 | 2006-12-11 14:09:07 +1100 | [diff] [blame] | 275 | return np; |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 276 | } |
| 277 | EXPORT_SYMBOL(pci_busdev_to_OF_node); |
| 278 | |
| 279 | struct device_node* |
| 280 | pci_device_to_OF_node(struct pci_dev *dev) |
| 281 | { |
| 282 | return pci_busdev_to_OF_node(dev->bus, dev->devfn); |
| 283 | } |
| 284 | EXPORT_SYMBOL(pci_device_to_OF_node); |
| 285 | |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 286 | static int |
| 287 | find_OF_pci_device_filter(struct device_node* node, void* data) |
| 288 | { |
| 289 | return ((void *)node == data); |
| 290 | } |
| 291 | |
| 292 | /* |
| 293 | * Returns the PCI device matching a given OF node |
| 294 | */ |
| 295 | int |
| 296 | pci_device_from_OF_node(struct device_node* node, u8* bus, u8* devfn) |
| 297 | { |
Jeremy Kerr | a7f67bd | 2006-07-12 15:35:54 +1000 | [diff] [blame] | 298 | const unsigned int *reg; |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 299 | struct pci_controller* hose; |
| 300 | struct pci_dev* dev = NULL; |
| 301 | |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 302 | /* Make sure it's really a PCI device */ |
| 303 | hose = pci_find_hose_for_OF_device(node); |
Stephen Rothwell | 44ef339 | 2007-12-10 14:33:21 +1100 | [diff] [blame] | 304 | if (!hose || !hose->dn) |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 305 | return -ENODEV; |
Stephen Rothwell | 66524b2 | 2007-12-21 15:52:43 +1100 | [diff] [blame] | 306 | if (!scan_OF_pci_childs(hose->dn, |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 307 | find_OF_pci_device_filter, (void *)node)) |
| 308 | return -ENODEV; |
Stephen Rothwell | e2eb639 | 2007-04-03 22:26:41 +1000 | [diff] [blame] | 309 | reg = of_get_property(node, "reg", NULL); |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 310 | if (!reg) |
| 311 | return -ENODEV; |
| 312 | *bus = (reg[0] >> 16) & 0xff; |
| 313 | *devfn = ((reg[0] >> 8) & 0xff); |
| 314 | |
| 315 | /* Ok, here we need some tweak. If we have already renumbered |
| 316 | * all busses, we can't rely on the OF bus number any more. |
| 317 | * the pci_to_OF_bus_map is not enough as several PCI busses |
| 318 | * may match the same OF bus number. |
| 319 | */ |
| 320 | if (!pci_to_OF_bus_map) |
| 321 | return 0; |
| 322 | |
| 323 | for_each_pci_dev(dev) |
| 324 | if (pci_to_OF_bus_map[dev->bus->number] == *bus && |
| 325 | dev->devfn == *devfn) { |
| 326 | *bus = dev->bus->number; |
| 327 | pci_dev_put(dev); |
| 328 | return 0; |
| 329 | } |
| 330 | |
| 331 | return -ENODEV; |
| 332 | } |
| 333 | EXPORT_SYMBOL(pci_device_from_OF_node); |
| 334 | |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 335 | /* We create the "pci-OF-bus-map" property now so it appears in the |
| 336 | * /proc device tree |
| 337 | */ |
| 338 | void __init |
| 339 | pci_create_OF_bus_map(void) |
| 340 | { |
| 341 | struct property* of_prop; |
Stephen Rothwell | 8c8dc32 | 2007-04-24 13:50:55 +1000 | [diff] [blame] | 342 | struct device_node *dn; |
| 343 | |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 344 | of_prop = (struct property*) alloc_bootmem(sizeof(struct property) + 256); |
Stephen Rothwell | 8c8dc32 | 2007-04-24 13:50:55 +1000 | [diff] [blame] | 345 | if (!of_prop) |
| 346 | return; |
| 347 | dn = of_find_node_by_path("/"); |
| 348 | if (dn) { |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 349 | memset(of_prop, -1, sizeof(struct property) + 256); |
| 350 | of_prop->name = "pci-OF-bus-map"; |
| 351 | of_prop->length = 256; |
Stephen Rothwell | 1a38147 | 2007-04-03 10:58:52 +1000 | [diff] [blame] | 352 | of_prop->value = &of_prop[1]; |
Stephen Rothwell | 8c8dc32 | 2007-04-24 13:50:55 +1000 | [diff] [blame] | 353 | prom_add_property(dn, of_prop); |
| 354 | of_node_put(dn); |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 355 | } |
| 356 | } |
| 357 | |
Grant Likely | 0ed2c72 | 2009-08-28 08:58:16 +0000 | [diff] [blame] | 358 | void __devinit pcibios_setup_phb_io_space(struct pci_controller *hose) |
Benjamin Herrenschmidt | 5328032 | 2008-10-27 19:48:29 +0000 | [diff] [blame] | 359 | { |
Benjamin Herrenschmidt | 5328032 | 2008-10-27 19:48:29 +0000 | [diff] [blame] | 360 | unsigned long io_offset; |
| 361 | struct resource *res = &hose->io_resource; |
| 362 | |
Benjamin Herrenschmidt | 5328032 | 2008-10-27 19:48:29 +0000 | [diff] [blame] | 363 | /* Fixup IO space offset */ |
| 364 | io_offset = (unsigned long)hose->io_base_virt - isa_io_base; |
| 365 | res->start = (res->start + io_offset) & 0xffffffffu; |
| 366 | res->end = (res->end + io_offset) & 0xffffffffu; |
Benjamin Herrenschmidt | 5328032 | 2008-10-27 19:48:29 +0000 | [diff] [blame] | 367 | } |
| 368 | |
Benjamin Herrenschmidt | 3fd94c6 | 2007-12-20 14:54:53 +1100 | [diff] [blame] | 369 | static int __init pcibios_init(void) |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 370 | { |
Kumar Gala | a4c9e32 | 2007-06-27 13:09:43 -0500 | [diff] [blame] | 371 | struct pci_controller *hose, *tmp; |
Kumar Gala | a4c9e32 | 2007-06-27 13:09:43 -0500 | [diff] [blame] | 372 | int next_busno = 0; |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 373 | |
| 374 | printk(KERN_INFO "PCI: Probing PCI hardware\n"); |
| 375 | |
Benjamin Herrenschmidt | fc3fb71 | 2007-12-20 14:54:46 +1100 | [diff] [blame] | 376 | if (ppc_pci_flags & PPC_PCI_REASSIGN_ALL_BUS) |
| 377 | pci_assign_all_buses = 1; |
| 378 | |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 379 | /* Scan all of the recorded PCI controllers. */ |
Kumar Gala | a4c9e32 | 2007-06-27 13:09:43 -0500 | [diff] [blame] | 380 | list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 381 | if (pci_assign_all_buses) |
| 382 | hose->first_busno = next_busno; |
| 383 | hose->last_busno = 0xff; |
Grant Likely | b5d937d | 2011-02-04 11:24:11 -0700 | [diff] [blame] | 384 | pcibios_scan_phb(hose); |
Benjamin Herrenschmidt | 5328032 | 2008-10-27 19:48:29 +0000 | [diff] [blame] | 385 | pci_bus_add_devices(hose->bus); |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 386 | if (pci_assign_all_buses || next_busno <= hose->last_busno) |
| 387 | next_busno = hose->last_busno + pcibios_assign_bus_offset; |
| 388 | } |
| 389 | pci_bus_count = next_busno; |
| 390 | |
| 391 | /* OpenFirmware based machines need a map of OF bus |
| 392 | * numbers vs. kernel bus numbers since we may have to |
| 393 | * remap them. |
| 394 | */ |
Anton Vorontsov | 6b82b3e | 2008-12-09 09:47:29 +0000 | [diff] [blame] | 395 | if (pci_assign_all_buses) |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 396 | pcibios_make_OF_bus_map(); |
| 397 | |
Benjamin Herrenschmidt | 3fd94c6 | 2007-12-20 14:54:53 +1100 | [diff] [blame] | 398 | /* Call common code to handle resource allocation */ |
| 399 | pcibios_resource_survey(); |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 400 | |
| 401 | /* Call machine dependent post-init code */ |
| 402 | if (ppc_md.pcibios_after_init) |
| 403 | ppc_md.pcibios_after_init(); |
| 404 | |
| 405 | return 0; |
| 406 | } |
| 407 | |
| 408 | subsys_initcall(pcibios_init); |
| 409 | |
Kumar Gala | 0b1d40c | 2007-06-27 10:27:33 -0500 | [diff] [blame] | 410 | static struct pci_controller* |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 411 | pci_bus_to_hose(int bus) |
| 412 | { |
Kumar Gala | a4c9e32 | 2007-06-27 13:09:43 -0500 | [diff] [blame] | 413 | struct pci_controller *hose, *tmp; |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 414 | |
Kumar Gala | a4c9e32 | 2007-06-27 13:09:43 -0500 | [diff] [blame] | 415 | list_for_each_entry_safe(hose, tmp, &hose_list, list_node) |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 416 | if (bus >= hose->first_busno && bus <= hose->last_busno) |
| 417 | return hose; |
| 418 | return NULL; |
| 419 | } |
| 420 | |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 421 | /* Provide information on locations of various I/O regions in physical |
| 422 | * memory. Do this on a per-card basis so that we choose the right |
| 423 | * root bridge. |
| 424 | * Note that the returned IO or memory base is a physical address |
| 425 | */ |
| 426 | |
| 427 | long sys_pciconfig_iobase(long which, unsigned long bus, unsigned long devfn) |
| 428 | { |
| 429 | struct pci_controller* hose; |
| 430 | long result = -EOPNOTSUPP; |
| 431 | |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 432 | hose = pci_bus_to_hose(bus); |
| 433 | if (!hose) |
| 434 | return -ENODEV; |
| 435 | |
| 436 | switch (which) { |
| 437 | case IOBASE_BRIDGE_NUMBER: |
| 438 | return (long)hose->first_busno; |
| 439 | case IOBASE_MEMORY: |
| 440 | return (long)hose->pci_mem_offset; |
| 441 | case IOBASE_IO: |
| 442 | return (long)hose->io_base_phys; |
| 443 | case IOBASE_ISA_IO: |
| 444 | return (long)isa_io_base; |
| 445 | case IOBASE_ISA_MEM: |
| 446 | return (long)isa_mem_base; |
| 447 | } |
| 448 | |
| 449 | return result; |
| 450 | } |
| 451 | |
Paul Mackerras | e05b3b4 | 2006-01-15 22:05:47 +1100 | [diff] [blame] | 452 | |