lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[SPARC64]: Consolidate PCI mem/io resource determination.

Browse Source 
It can be done for every PCI configuration using OF properties.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2007-03-08 21:55:49 -08:00
parent 01f94c4a6c
commit 9fd8b64761
6 changed files with 103 additions and 218 deletions
Download Patch File Download Diff File Expand all files Collapse all files

94
arch/sparc64/kernel/pci_common.c
View File

@@ -1,7 +1,6 @@
/* $Id: pci_common.c,v 1.29 2002/02/01 00:56:03 davem Exp $
* pci_common.c: PCI controller common support.
/* pci_common.c: PCI controller common support.
*
* Copyright (C) 1999 David S. Miller (davem@redhat.com)
* Copyright (C) 1999, 2007 David S. Miller (davem@davemloft.net)
*/
#include <linux/string.h>
@@ -16,8 +15,8 @@
#include "pci_impl.h"
void pci_register_legacy_regions(struct resource *io_res,
struct resource *mem_res)
static void pci_register_legacy_regions(struct resource *io_res,
struct resource *mem_res)
{
struct resource *p;
@@ -53,6 +52,91 @@ void pci_register_legacy_regions(struct resource *io_res,
request_resource(mem_res, p);
}
static void pci_register_iommu_region(struct pci_pbm_info *pbm)
{
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)
{
int i, saw_mem, saw_io;
saw_mem = saw_io = 0;
for (i = 0; i < pbm->num_pbm_ranges; i++) {
struct linux_prom_pci_ranges *pr = &pbm->pbm_ranges[i];
unsigned long a;
int type;
type = (pr->child_phys_hi >> 24) & 0x3;
a = (((unsigned long)pr->parent_phys_hi << 32UL) |
((unsigned long)pr->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_controller_info *p,
struct pci_pbm_info *pbm,