1 /* pci_common.c: PCI controller common support.
3 * Copyright (C) 1999, 2007 David S. Miller (davem@davemloft.net)
6 #include <linux/string.h>
7 #include <linux/slab.h>
8 #include <linux/init.h>
10 #include <linux/device.h>
14 #include <asm/of_device.h>
18 static void pci_register_legacy_regions(struct resource *io_res,
19 struct resource *mem_res)
24 p = kzalloc(sizeof(*p), GFP_KERNEL);
28 p->name = "Video RAM area";
29 p->start = mem_res->start + 0xa0000UL;
30 p->end = p->start + 0x1ffffUL;
31 p->flags = IORESOURCE_BUSY;
32 request_resource(mem_res, p);
34 p = kzalloc(sizeof(*p), GFP_KERNEL);
38 p->name = "System ROM";
39 p->start = mem_res->start + 0xf0000UL;
40 p->end = p->start + 0xffffUL;
41 p->flags = IORESOURCE_BUSY;
42 request_resource(mem_res, p);
44 p = kzalloc(sizeof(*p), GFP_KERNEL);
48 p->name = "Video ROM";
49 p->start = mem_res->start + 0xc0000UL;
50 p->end = p->start + 0x7fffUL;
51 p->flags = IORESOURCE_BUSY;
52 request_resource(mem_res, p);
55 static void pci_register_iommu_region(struct pci_pbm_info *pbm)
57 u32 *vdma = of_get_property(pbm->prom_node, "virtual-dma", NULL);
60 struct resource *rp = kmalloc(sizeof(*rp), GFP_KERNEL);
63 prom_printf("Cannot allocate IOMMU resource.\n");
67 rp->start = pbm->mem_space.start + (unsigned long) vdma[0];
68 rp->end = rp->start + (unsigned long) vdma[1] - 1UL;
69 rp->flags = IORESOURCE_BUSY;
70 request_resource(&pbm->mem_space, rp);
74 void pci_determine_mem_io_space(struct pci_pbm_info *pbm)
76 int i, saw_mem, saw_io;
79 for (i = 0; i < pbm->num_pbm_ranges; i++) {
80 struct linux_prom_pci_ranges *pr = &pbm->pbm_ranges[i];
84 type = (pr->child_phys_hi >> 24) & 0x3;
85 a = (((unsigned long)pr->parent_phys_hi << 32UL) |
86 ((unsigned long)pr->parent_phys_lo << 0UL));
90 /* PCI config space, 16MB */
91 pbm->config_space = a;
95 /* 16-bit IO space, 16MB */
96 pbm->io_space.start = a;
97 pbm->io_space.end = a + ((16UL*1024UL*1024UL) - 1UL);
98 pbm->io_space.flags = IORESOURCE_IO;
103 /* 32-bit MEM space, 2GB */
104 pbm->mem_space.start = a;
105 pbm->mem_space.end = a + (0x80000000UL - 1UL);
106 pbm->mem_space.flags = IORESOURCE_MEM;
111 /* XXX 64-bit MEM handling XXX */
118 if (!saw_io || !saw_mem) {
119 prom_printf("%s: Fatal error, missing %s PBM range.\n",
121 (!saw_io ? "IO" : "MEM"));
125 printk("%s: PCI IO[%lx] MEM[%lx]\n",
128 pbm->mem_space.start);
130 pbm->io_space.name = pbm->mem_space.name = pbm->name;
132 request_resource(&ioport_resource, &pbm->io_space);
133 request_resource(&iomem_resource, &pbm->mem_space);
135 pci_register_legacy_regions(&pbm->io_space,
137 pci_register_iommu_region(pbm);
140 /* Generic helper routines for PCI error reporting. */
141 void pci_scan_for_target_abort(struct pci_controller_info *p,
142 struct pci_pbm_info *pbm,
143 struct pci_bus *pbus)
145 struct pci_dev *pdev;
148 list_for_each_entry(pdev, &pbus->devices, bus_list) {
149 u16 status, error_bits;
151 pci_read_config_word(pdev, PCI_STATUS, &status);
153 (status & (PCI_STATUS_SIG_TARGET_ABORT |
154 PCI_STATUS_REC_TARGET_ABORT));
156 pci_write_config_word(pdev, PCI_STATUS, error_bits);
157 printk("PCI%d(PBM%c): Device [%s] saw Target Abort [%016x]\n",
158 p->index, ((pbm == &p->pbm_A) ? 'A' : 'B'),
159 pci_name(pdev), status);
163 list_for_each_entry(bus, &pbus->children, node)
164 pci_scan_for_target_abort(p, pbm, bus);
167 void pci_scan_for_master_abort(struct pci_controller_info *p,
168 struct pci_pbm_info *pbm,
169 struct pci_bus *pbus)
171 struct pci_dev *pdev;
174 list_for_each_entry(pdev, &pbus->devices, bus_list) {
175 u16 status, error_bits;
177 pci_read_config_word(pdev, PCI_STATUS, &status);
179 (status & (PCI_STATUS_REC_MASTER_ABORT));
181 pci_write_config_word(pdev, PCI_STATUS, error_bits);
182 printk("PCI%d(PBM%c): Device [%s] received Master Abort [%016x]\n",
183 p->index, ((pbm == &p->pbm_A) ? 'A' : 'B'),
184 pci_name(pdev), status);
188 list_for_each_entry(bus, &pbus->children, node)
189 pci_scan_for_master_abort(p, pbm, bus);
192 void pci_scan_for_parity_error(struct pci_controller_info *p,
193 struct pci_pbm_info *pbm,
194 struct pci_bus *pbus)
196 struct pci_dev *pdev;
199 list_for_each_entry(pdev, &pbus->devices, bus_list) {
200 u16 status, error_bits;
202 pci_read_config_word(pdev, PCI_STATUS, &status);
204 (status & (PCI_STATUS_PARITY |
205 PCI_STATUS_DETECTED_PARITY));
207 pci_write_config_word(pdev, PCI_STATUS, error_bits);
208 printk("PCI%d(PBM%c): Device [%s] saw Parity Error [%016x]\n",
209 p->index, ((pbm == &p->pbm_A) ? 'A' : 'B'),
210 pci_name(pdev), status);
214 list_for_each_entry(bus, &pbus->children, node)
215 pci_scan_for_parity_error(p, pbm, bus);