linux/arch/sparc64/kernel/pci_sun4v.c

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/* pci_sun4v.c: SUN4V specific PCI controller support.
*
* Copyright (C) 2006 David S. Miller (davem@davemloft.net)
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <asm/pbm.h>
#include <asm/iommu.h>
#include <asm/irq.h>
#include <asm/upa.h>
#include <asm/pstate.h>
#include <asm/oplib.h>
#include <asm/hypervisor.h>
#include "pci_impl.h"
#include "iommu_common.h"
#include "pci_sun4v.h"
static void *pci_4v_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr_t *dma_addrp)
{
return NULL;
}
static void pci_4v_free_consistent(struct pci_dev *pdev, size_t size, void *cpu, dma_addr_t dvma)
{
}
static dma_addr_t pci_4v_map_single(struct pci_dev *pdev, void *ptr, size_t sz, int direction)
{
return 0;
}
static void pci_4v_unmap_single(struct pci_dev *pdev, dma_addr_t bus_addr, size_t sz, int direction)
{
}
static int pci_4v_map_sg(struct pci_dev *pdev, struct scatterlist *sglist, int nelems, int direction)
{
return nelems;
}
static void pci_4v_unmap_sg(struct pci_dev *pdev, struct scatterlist *sglist, int nelems, int direction)
{
}
static void pci_4v_dma_sync_single_for_cpu(struct pci_dev *pdev, dma_addr_t bus_addr, size_t sz, int direction)
{
}
static void pci_4v_dma_sync_sg_for_cpu(struct pci_dev *pdev, struct scatterlist *sglist, int nelems, int direction)
{
}
struct pci_iommu_ops pci_sun4v_iommu_ops = {
.alloc_consistent = pci_4v_alloc_consistent,
.free_consistent = pci_4v_free_consistent,
.map_single = pci_4v_map_single,
.unmap_single = pci_4v_unmap_single,
.map_sg = pci_4v_map_sg,
.unmap_sg = pci_4v_unmap_sg,
.dma_sync_single_for_cpu = pci_4v_dma_sync_single_for_cpu,
.dma_sync_sg_for_cpu = pci_4v_dma_sync_sg_for_cpu,
};
/* SUN4V PCI configuration space accessors. */
static int pci_sun4v_read_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn,
int where, int size, u32 *value)
{
/* XXX Implement me! XXX */
return 0;
}
static int pci_sun4v_write_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn,
int where, int size, u32 value)
{
/* XXX Implement me! XXX */
return 0;
}
static struct pci_ops pci_sun4v_ops = {
.read = pci_sun4v_read_pci_cfg,
.write = pci_sun4v_write_pci_cfg,
};
static void pci_sun4v_scan_bus(struct pci_controller_info *p)
{
/* XXX Implement me! XXX */
}
static unsigned int pci_sun4v_irq_build(struct pci_pbm_info *pbm,
struct pci_dev *pdev,
unsigned int ino)
{
/* XXX Implement me! XXX */
return 0;
}
/* XXX correct? XXX */
static void pci_sun4v_base_address_update(struct pci_dev *pdev, int resource)
{
struct pcidev_cookie *pcp = pdev->sysdata;
struct pci_pbm_info *pbm = pcp->pbm;
struct resource *res, *root;
u32 reg;
int where, size, is_64bit;
res = &pdev->resource[resource];
if (resource < 6) {
where = PCI_BASE_ADDRESS_0 + (resource * 4);
} else if (resource == PCI_ROM_RESOURCE) {
where = pdev->rom_base_reg;
} else {
/* Somebody might have asked allocation of a non-standard resource */
return;
}
is_64bit = 0;
if (res->flags & IORESOURCE_IO)
root = &pbm->io_space;
else {
root = &pbm->mem_space;
if ((res->flags & PCI_BASE_ADDRESS_MEM_TYPE_MASK)
== PCI_BASE_ADDRESS_MEM_TYPE_64)
is_64bit = 1;
}
size = res->end - res->start;
pci_read_config_dword(pdev, where, &reg);
reg = ((reg & size) |
(((u32)(res->start - root->start)) & ~size));
if (resource == PCI_ROM_RESOURCE) {
reg |= PCI_ROM_ADDRESS_ENABLE;
res->flags |= IORESOURCE_ROM_ENABLE;
}
pci_write_config_dword(pdev, where, reg);
/* This knows that the upper 32-bits of the address
* must be zero. Our PCI common layer enforces this.
*/
if (is_64bit)
pci_write_config_dword(pdev, where + 4, 0);
}
/* XXX correct? XXX */
static void pci_sun4v_resource_adjust(struct pci_dev *pdev,
struct resource *res,
struct resource *root)
{
res->start += root->start;
res->end += root->start;
}
/* Use ranges property to determine where PCI MEM, I/O, and Config
* space are for this PCI bus module.
*/
static void pci_sun4v_determine_mem_io_space(struct pci_pbm_info *pbm)
{
int i, saw_cfg, saw_mem, saw_io;
saw_cfg = 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;
saw_cfg = 1;
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;
default:
break;
};
}
if (!saw_cfg || !saw_io || !saw_mem) {
prom_printf("%s: Fatal error, missing %s PBM range.\n",
pbm->name,
((!saw_cfg ?
"CFG" :
(!saw_io ?
"IO" : "MEM"))));
prom_halt();
}
printk("%s: PCI CFG[%lx] IO[%lx] MEM[%lx]\n",
pbm->name,
pbm->config_space,
pbm->io_space.start,
pbm->mem_space.start);
}
static void pbm_register_toplevel_resources(struct pci_controller_info *p,
struct pci_pbm_info *pbm)
{
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);
}
static void pci_sun4v_iommu_init(struct pci_pbm_info *pbm)
{
/* XXX Implement me! XXX */
}
static void pci_sun4v_pbm_init(struct pci_controller_info *p, int prom_node)
{
struct pci_pbm_info *pbm;
struct linux_prom64_registers regs;
unsigned int busrange[2];
int err;
/* XXX */
pbm = &p->pbm_A;
pbm->parent = p;
pbm->prom_node = prom_node;
pbm->pci_first_slot = 1;
prom_getproperty(prom_node, "reg", (char *)&regs, sizeof(regs));
pbm->devhandle = (regs.phys_addr >> 32UL) & 0x0fffffff;
sprintf(pbm->name, "SUN4V-PCI%d PBM%c",
p->index, (pbm == &p->pbm_A ? 'A' : 'B'));
printk("%s: devhandle[%x]\n", pbm->name, pbm->devhandle);
prom_getstring(prom_node, "name",
pbm->prom_name, sizeof(pbm->prom_name));
err = prom_getproperty(prom_node, "ranges",
(char *) pbm->pbm_ranges,
sizeof(pbm->pbm_ranges));
if (err == 0 || err == -1) {
prom_printf("%s: Fatal error, no ranges property.\n",
pbm->name);
prom_halt();
}
pbm->num_pbm_ranges =
(err / sizeof(struct linux_prom_pci_ranges));
pci_sun4v_determine_mem_io_space(pbm);
pbm_register_toplevel_resources(p, pbm);
err = prom_getproperty(prom_node, "interrupt-map",
(char *)pbm->pbm_intmap,
sizeof(pbm->pbm_intmap));
if (err != -1) {
pbm->num_pbm_intmap = (err / sizeof(struct linux_prom_pci_intmap));
err = prom_getproperty(prom_node, "interrupt-map-mask",
(char *)&pbm->pbm_intmask,
sizeof(pbm->pbm_intmask));
if (err == -1) {
prom_printf("%s: Fatal error, no "
"interrupt-map-mask.\n", pbm->name);
prom_halt();
}
} else {
pbm->num_pbm_intmap = 0;
memset(&pbm->pbm_intmask, 0, sizeof(pbm->pbm_intmask));
}
err = prom_getproperty(prom_node, "bus-range",
(char *)&busrange[0],
sizeof(busrange));
if (err == 0 || err == -1) {
prom_printf("%s: Fatal error, no bus-range.\n", pbm->name);
prom_halt();
}
pbm->pci_first_busno = busrange[0];
pbm->pci_last_busno = busrange[1];
pci_sun4v_iommu_init(pbm);
}
void sun4v_pci_init(int node, char *model_name)
{
struct pci_controller_info *p;
struct pci_iommu *iommu;
p = kmalloc(sizeof(struct pci_controller_info), GFP_ATOMIC);
if (!p) {
prom_printf("SUN4V_PCI: Fatal memory allocation error.\n");
prom_halt();
}
memset(p, 0, sizeof(*p));
iommu = kmalloc(sizeof(struct pci_iommu), GFP_ATOMIC);
if (!iommu) {
prom_printf("SCHIZO: Fatal memory allocation error.\n");
prom_halt();
}
memset(iommu, 0, sizeof(*iommu));
p->pbm_A.iommu = iommu;
iommu = kmalloc(sizeof(struct pci_iommu), GFP_ATOMIC);
if (!iommu) {
prom_printf("SCHIZO: Fatal memory allocation error.\n");
prom_halt();
}
memset(iommu, 0, sizeof(*iommu));
p->pbm_B.iommu = iommu;
p->next = pci_controller_root;
pci_controller_root = p;
p->index = pci_num_controllers++;
p->pbms_same_domain = 0;
p->scan_bus = pci_sun4v_scan_bus;
p->irq_build = pci_sun4v_irq_build;
p->base_address_update = pci_sun4v_base_address_update;
p->resource_adjust = pci_sun4v_resource_adjust;
p->pci_ops = &pci_sun4v_ops;
/* Like PSYCHO and SCHIZO we have a 2GB aligned area
* for memory space.
*/
pci_memspace_mask = 0x7fffffffUL;
pci_sun4v_pbm_init(p, node);
prom_printf("sun4v_pci_init: Implement me.\n");
prom_halt();
}