123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235 |
- /* pci_common.c: PCI controller common support.
- *
- * Copyright (C) 1999, 2007 David S. Miller (davem@davemloft.net)
- */
- #include <linux/string.h>
- #include <linux/slab.h>
- #include <linux/init.h>
- #include <linux/pci.h>
- #include <linux/device.h>
- #include <asm/prom.h>
- #include <asm/of_device.h>
- #include <asm/oplib.h>
- #include "pci_impl.h"
- void pci_get_pbm_props(struct pci_pbm_info *pbm)
- {
- const u32 *val = of_get_property(pbm->prom_node, "bus-range", NULL);
- pbm->pci_first_busno = val[0];
- pbm->pci_last_busno = val[1];
- val = of_get_property(pbm->prom_node, "ino-bitmap", NULL);
- if (val) {
- pbm->ino_bitmap = (((u64)val[1] << 32UL) |
- ((u64)val[0] << 0UL));
- }
- }
- static void pci_register_legacy_regions(struct resource *io_res,
- struct resource *mem_res)
- {
- struct resource *p;
- /* VGA Video RAM. */
- p = kzalloc(sizeof(*p), GFP_KERNEL);
- if (!p)
- return;
- p->name = "Video RAM area";
- p->start = mem_res->start + 0xa0000UL;
- p->end = p->start + 0x1ffffUL;
- p->flags = IORESOURCE_BUSY;
- request_resource(mem_res, p);
- p = kzalloc(sizeof(*p), GFP_KERNEL);
- if (!p)
- return;
- p->name = "System ROM";
- p->start = mem_res->start + 0xf0000UL;
- p->end = p->start + 0xffffUL;
- p->flags = IORESOURCE_BUSY;
- request_resource(mem_res, p);
- p = kzalloc(sizeof(*p), GFP_KERNEL);
- if (!p)
- return;
- p->name = "Video ROM";
- p->start = mem_res->start + 0xc0000UL;
- p->end = p->start + 0x7fffUL;
- p->flags = IORESOURCE_BUSY;
- request_resource(mem_res, p);
- }
- static void pci_register_iommu_region(struct pci_pbm_info *pbm)
- {
- const u32 *vdma = of_get_property(pbm->prom_node, "virtual-dma", NULL);
- if (vdma) {
- struct resource *rp = kmalloc(sizeof(*rp), GFP_KERNEL);
- if (!rp) {
- prom_printf("Cannot allocate IOMMU resource.\n");
- prom_halt();
- }
- rp->name = "IOMMU";
- rp->start = pbm->mem_space.start + (unsigned long) vdma[0];
- rp->end = rp->start + (unsigned long) vdma[1] - 1UL;
- rp->flags = IORESOURCE_BUSY;
- request_resource(&pbm->mem_space, rp);
- }
- }
- void pci_determine_mem_io_space(struct pci_pbm_info *pbm)
- {
- const struct linux_prom_pci_ranges *pbm_ranges;
- int i, saw_mem, saw_io;
- int num_pbm_ranges;
- saw_mem = saw_io = 0;
- pbm_ranges = of_get_property(pbm->prom_node, "ranges", &i);
- num_pbm_ranges = i / sizeof(*pbm_ranges);
- for (i = 0; i < num_pbm_ranges; i++) {
- const struct linux_prom_pci_ranges *pr = &pbm_ranges[i];
- unsigned long a;
- u32 parent_phys_hi, parent_phys_lo;
- int type;
- parent_phys_hi = pr->parent_phys_hi;
- parent_phys_lo = pr->parent_phys_lo;
- if (tlb_type == hypervisor)
- parent_phys_hi &= 0x0fffffff;
- type = (pr->child_phys_hi >> 24) & 0x3;
- a = (((unsigned long)parent_phys_hi << 32UL) |
- ((unsigned long)parent_phys_lo << 0UL));
- switch (type) {
- case 0:
- /* PCI config space, 16MB */
- pbm->config_space = a;
- break;
- case 1:
- /* 16-bit IO space, 16MB */
- pbm->io_space.start = a;
- pbm->io_space.end = a + ((16UL*1024UL*1024UL) - 1UL);
- pbm->io_space.flags = IORESOURCE_IO;
- saw_io = 1;
- break;
- case 2:
- /* 32-bit MEM space, 2GB */
- pbm->mem_space.start = a;
- pbm->mem_space.end = a + (0x80000000UL - 1UL);
- pbm->mem_space.flags = IORESOURCE_MEM;
- saw_mem = 1;
- break;
- case 3:
- /* XXX 64-bit MEM handling XXX */
- default:
- break;
- };
- }
- if (!saw_io || !saw_mem) {
- prom_printf("%s: Fatal error, missing %s PBM range.\n",
- pbm->name,
- (!saw_io ? "IO" : "MEM"));
- prom_halt();
- }
- printk("%s: PCI IO[%lx] MEM[%lx]\n",
- pbm->name,
- pbm->io_space.start,
- pbm->mem_space.start);
- pbm->io_space.name = pbm->mem_space.name = pbm->name;
- request_resource(&ioport_resource, &pbm->io_space);
- request_resource(&iomem_resource, &pbm->mem_space);
- pci_register_legacy_regions(&pbm->io_space,
- &pbm->mem_space);
- pci_register_iommu_region(pbm);
- }
- /* Generic helper routines for PCI error reporting. */
- void pci_scan_for_target_abort(struct pci_pbm_info *pbm,
- struct pci_bus *pbus)
- {
- struct pci_dev *pdev;
- struct pci_bus *bus;
- list_for_each_entry(pdev, &pbus->devices, bus_list) {
- u16 status, error_bits;
- pci_read_config_word(pdev, PCI_STATUS, &status);
- error_bits =
- (status & (PCI_STATUS_SIG_TARGET_ABORT |
- PCI_STATUS_REC_TARGET_ABORT));
- if (error_bits) {
- pci_write_config_word(pdev, PCI_STATUS, error_bits);
- printk("%s: Device %s saw Target Abort [%016x]\n",
- pbm->name, pci_name(pdev), status);
- }
- }
- list_for_each_entry(bus, &pbus->children, node)
- pci_scan_for_target_abort(pbm, bus);
- }
- void pci_scan_for_master_abort(struct pci_pbm_info *pbm,
- struct pci_bus *pbus)
- {
- struct pci_dev *pdev;
- struct pci_bus *bus;
- list_for_each_entry(pdev, &pbus->devices, bus_list) {
- u16 status, error_bits;
- pci_read_config_word(pdev, PCI_STATUS, &status);
- error_bits =
- (status & (PCI_STATUS_REC_MASTER_ABORT));
- if (error_bits) {
- pci_write_config_word(pdev, PCI_STATUS, error_bits);
- printk("%s: Device %s received Master Abort [%016x]\n",
- pbm->name, pci_name(pdev), status);
- }
- }
- list_for_each_entry(bus, &pbus->children, node)
- pci_scan_for_master_abort(pbm, bus);
- }
- void pci_scan_for_parity_error(struct pci_pbm_info *pbm,
- struct pci_bus *pbus)
- {
- struct pci_dev *pdev;
- struct pci_bus *bus;
- list_for_each_entry(pdev, &pbus->devices, bus_list) {
- u16 status, error_bits;
- pci_read_config_word(pdev, PCI_STATUS, &status);
- error_bits =
- (status & (PCI_STATUS_PARITY |
- PCI_STATUS_DETECTED_PARITY));
- if (error_bits) {
- pci_write_config_word(pdev, PCI_STATUS, error_bits);
- printk("%s: Device %s saw Parity Error [%016x]\n",
- pbm->name, pci_name(pdev), status);
- }
- }
- list_for_each_entry(bus, &pbus->children, node)
- pci_scan_for_parity_error(pbm, bus);
- }
|