2007-03-09 13:55:49 +08:00
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/* pci_common.c: PCI controller common support.
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2005-04-17 06:20:36 +08:00
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*
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2007-03-09 13:55:49 +08:00
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* Copyright (C) 1999, 2007 David S. Miller (davem@davemloft.net)
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2005-04-17 06:20:36 +08:00
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*/
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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2006-12-21 01:22:28 +08:00
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#include <linux/pci.h>
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#include <linux/device.h>
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2005-04-17 06:20:36 +08:00
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#include <asm/pbm.h>
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2006-06-23 07:18:54 +08:00
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#include <asm/prom.h>
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2006-06-30 06:07:37 +08:00
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#include <asm/of_device.h>
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2006-06-23 07:18:54 +08:00
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#include "pci_impl.h"
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2005-04-17 06:20:36 +08:00
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2007-03-09 13:55:49 +08:00
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static void pci_register_legacy_regions(struct resource *io_res,
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struct resource *mem_res)
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2005-04-17 06:20:36 +08:00
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{
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struct resource *p;
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/* VGA Video RAM. */
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2006-03-07 05:48:40 +08:00
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p = kzalloc(sizeof(*p), GFP_KERNEL);
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2005-04-17 06:20:36 +08:00
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if (!p)
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return;
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p->name = "Video RAM area";
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p->start = mem_res->start + 0xa0000UL;
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p->end = p->start + 0x1ffffUL;
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p->flags = IORESOURCE_BUSY;
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request_resource(mem_res, p);
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2006-03-07 05:48:40 +08:00
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p = kzalloc(sizeof(*p), GFP_KERNEL);
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2005-04-17 06:20:36 +08:00
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if (!p)
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return;
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p->name = "System ROM";
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p->start = mem_res->start + 0xf0000UL;
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p->end = p->start + 0xffffUL;
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p->flags = IORESOURCE_BUSY;
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request_resource(mem_res, p);
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2006-03-07 05:48:40 +08:00
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p = kzalloc(sizeof(*p), GFP_KERNEL);
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2005-04-17 06:20:36 +08:00
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if (!p)
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return;
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p->name = "Video ROM";
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p->start = mem_res->start + 0xc0000UL;
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p->end = p->start + 0x7fffUL;
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p->flags = IORESOURCE_BUSY;
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request_resource(mem_res, p);
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}
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2007-03-09 13:55:49 +08:00
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static void pci_register_iommu_region(struct pci_pbm_info *pbm)
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{
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2007-03-29 16:50:16 +08:00
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const u32 *vdma = of_get_property(pbm->prom_node, "virtual-dma", NULL);
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2007-03-09 13:55:49 +08:00
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if (vdma) {
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struct resource *rp = kmalloc(sizeof(*rp), GFP_KERNEL);
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if (!rp) {
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prom_printf("Cannot allocate IOMMU resource.\n");
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prom_halt();
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}
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rp->name = "IOMMU";
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rp->start = pbm->mem_space.start + (unsigned long) vdma[0];
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rp->end = rp->start + (unsigned long) vdma[1] - 1UL;
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rp->flags = IORESOURCE_BUSY;
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request_resource(&pbm->mem_space, rp);
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}
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}
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void pci_determine_mem_io_space(struct pci_pbm_info *pbm)
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{
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2007-03-29 16:50:16 +08:00
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const struct linux_prom_pci_ranges *pbm_ranges;
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2007-03-09 13:55:49 +08:00
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int i, saw_mem, saw_io;
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2007-03-09 14:28:17 +08:00
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int num_pbm_ranges;
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2007-03-09 13:55:49 +08:00
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saw_mem = saw_io = 0;
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2007-03-09 14:28:17 +08:00
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pbm_ranges = of_get_property(pbm->prom_node, "ranges", &i);
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num_pbm_ranges = i / sizeof(*pbm_ranges);
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for (i = 0; i < num_pbm_ranges; i++) {
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2007-03-29 16:50:16 +08:00
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const struct linux_prom_pci_ranges *pr = &pbm_ranges[i];
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2007-03-09 13:55:49 +08:00
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unsigned long a;
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2007-03-09 14:28:17 +08:00
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u32 parent_phys_hi, parent_phys_lo;
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2007-03-09 13:55:49 +08:00
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int type;
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2007-03-09 14:28:17 +08:00
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parent_phys_hi = pr->parent_phys_hi;
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parent_phys_lo = pr->parent_phys_lo;
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if (tlb_type == hypervisor)
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parent_phys_hi &= 0x0fffffff;
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2007-03-09 13:55:49 +08:00
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type = (pr->child_phys_hi >> 24) & 0x3;
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2007-03-09 14:28:17 +08:00
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a = (((unsigned long)parent_phys_hi << 32UL) |
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((unsigned long)parent_phys_lo << 0UL));
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2007-03-09 13:55:49 +08:00
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switch (type) {
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case 0:
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/* PCI config space, 16MB */
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pbm->config_space = a;
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break;
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case 1:
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/* 16-bit IO space, 16MB */
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pbm->io_space.start = a;
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pbm->io_space.end = a + ((16UL*1024UL*1024UL) - 1UL);
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pbm->io_space.flags = IORESOURCE_IO;
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saw_io = 1;
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break;
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case 2:
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/* 32-bit MEM space, 2GB */
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pbm->mem_space.start = a;
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pbm->mem_space.end = a + (0x80000000UL - 1UL);
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pbm->mem_space.flags = IORESOURCE_MEM;
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saw_mem = 1;
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break;
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case 3:
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/* XXX 64-bit MEM handling XXX */
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default:
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break;
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};
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}
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if (!saw_io || !saw_mem) {
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prom_printf("%s: Fatal error, missing %s PBM range.\n",
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pbm->name,
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(!saw_io ? "IO" : "MEM"));
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prom_halt();
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}
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printk("%s: PCI IO[%lx] MEM[%lx]\n",
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pbm->name,
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pbm->io_space.start,
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pbm->mem_space.start);
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pbm->io_space.name = pbm->mem_space.name = pbm->name;
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request_resource(&ioport_resource, &pbm->io_space);
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request_resource(&iomem_resource, &pbm->mem_space);
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pci_register_legacy_regions(&pbm->io_space,
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&pbm->mem_space);
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pci_register_iommu_region(pbm);
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}
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2005-04-17 06:20:36 +08:00
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/* Generic helper routines for PCI error reporting. */
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void pci_scan_for_target_abort(struct pci_controller_info *p,
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struct pci_pbm_info *pbm,
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struct pci_bus *pbus)
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{
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struct pci_dev *pdev;
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struct pci_bus *bus;
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list_for_each_entry(pdev, &pbus->devices, bus_list) {
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u16 status, error_bits;
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pci_read_config_word(pdev, PCI_STATUS, &status);
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error_bits =
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(status & (PCI_STATUS_SIG_TARGET_ABORT |
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PCI_STATUS_REC_TARGET_ABORT));
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if (error_bits) {
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pci_write_config_word(pdev, PCI_STATUS, error_bits);
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printk("PCI%d(PBM%c): Device [%s] saw Target Abort [%016x]\n",
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p->index, ((pbm == &p->pbm_A) ? 'A' : 'B'),
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pci_name(pdev), status);
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}
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}
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list_for_each_entry(bus, &pbus->children, node)
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pci_scan_for_target_abort(p, pbm, bus);
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}
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void pci_scan_for_master_abort(struct pci_controller_info *p,
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struct pci_pbm_info *pbm,
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struct pci_bus *pbus)
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{
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struct pci_dev *pdev;
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struct pci_bus *bus;
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list_for_each_entry(pdev, &pbus->devices, bus_list) {
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u16 status, error_bits;
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pci_read_config_word(pdev, PCI_STATUS, &status);
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error_bits =
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(status & (PCI_STATUS_REC_MASTER_ABORT));
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if (error_bits) {
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pci_write_config_word(pdev, PCI_STATUS, error_bits);
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printk("PCI%d(PBM%c): Device [%s] received Master Abort [%016x]\n",
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p->index, ((pbm == &p->pbm_A) ? 'A' : 'B'),
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pci_name(pdev), status);
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}
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}
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list_for_each_entry(bus, &pbus->children, node)
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pci_scan_for_master_abort(p, pbm, bus);
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}
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void pci_scan_for_parity_error(struct pci_controller_info *p,
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struct pci_pbm_info *pbm,
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struct pci_bus *pbus)
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{
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struct pci_dev *pdev;
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struct pci_bus *bus;
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list_for_each_entry(pdev, &pbus->devices, bus_list) {
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u16 status, error_bits;
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pci_read_config_word(pdev, PCI_STATUS, &status);
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error_bits =
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(status & (PCI_STATUS_PARITY |
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PCI_STATUS_DETECTED_PARITY));
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if (error_bits) {
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pci_write_config_word(pdev, PCI_STATUS, error_bits);
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printk("PCI%d(PBM%c): Device [%s] saw Parity Error [%016x]\n",
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p->index, ((pbm == &p->pbm_A) ? 'A' : 'B'),
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pci_name(pdev), status);
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}
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}
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list_for_each_entry(bus, &pbus->children, node)
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pci_scan_for_parity_error(p, pbm, bus);
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}
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