forked from luck/tmp_suning_uos_patched
27097ef9ff
The PCI-E slot on T1000 connects directly to the Fire PCI chip with no
intervening bridges visible in the OBP tree.
Unfortunately the bus numbering of the device in that slot is
different (2) from the PCI host controller (0), and thus the
pci_bus_{read,write}_config_*() calls don't work out.
Complicating things further the Fire PCI controller has no config
space it responds to either.
For now treat this case specially so that devices in the slot work.
Longer term we need to perhaps cons up a dummy bridge between the Fire
and the PCI-E slot so that the bus hierarchy is complete inside of the
kernel and thus the bus numbering all works out right.
Signed-off-by: David S. Miller <davem@davemloft.net>
545 lines
12 KiB
C
545 lines
12 KiB
C
/* 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"
|
|
#include "pci_sun4v.h"
|
|
|
|
static int config_out_of_range(struct pci_pbm_info *pbm,
|
|
unsigned long bus,
|
|
unsigned long devfn,
|
|
unsigned long reg)
|
|
{
|
|
if (bus < pbm->pci_first_busno ||
|
|
bus > pbm->pci_last_busno)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static void *sun4u_config_mkaddr(struct pci_pbm_info *pbm,
|
|
unsigned long bus,
|
|
unsigned long devfn,
|
|
unsigned long reg)
|
|
{
|
|
unsigned long rbits = pbm->config_space_reg_bits;
|
|
|
|
if (config_out_of_range(pbm, bus, devfn, reg))
|
|
return NULL;
|
|
|
|
reg = (reg & ((1 << rbits) - 1));
|
|
devfn <<= rbits;
|
|
bus <<= rbits + 8;
|
|
|
|
return (void *) (pbm->config_space | bus | devfn | reg);
|
|
}
|
|
|
|
/* At least on Sabre, it is necessary to access all PCI host controller
|
|
* registers at their natural size, otherwise zeros are returned.
|
|
* Strange but true, and I see no language in the UltraSPARC-IIi
|
|
* programmer's manual that mentions this even indirectly.
|
|
*/
|
|
static int sun4u_read_pci_cfg_host(struct pci_pbm_info *pbm,
|
|
unsigned char bus, unsigned int devfn,
|
|
int where, int size, u32 *value)
|
|
{
|
|
u32 tmp32, *addr;
|
|
u16 tmp16;
|
|
u8 tmp8;
|
|
|
|
addr = sun4u_config_mkaddr(pbm, bus, devfn, where);
|
|
if (!addr)
|
|
return PCIBIOS_SUCCESSFUL;
|
|
|
|
switch (size) {
|
|
case 1:
|
|
if (where < 8) {
|
|
unsigned long align = (unsigned long) addr;
|
|
|
|
align &= ~1;
|
|
pci_config_read16((u16 *)align, &tmp16);
|
|
if (where & 1)
|
|
*value = tmp16 >> 8;
|
|
else
|
|
*value = tmp16 & 0xff;
|
|
} else {
|
|
pci_config_read8((u8 *)addr, &tmp8);
|
|
*value = (u32) tmp8;
|
|
}
|
|
break;
|
|
|
|
case 2:
|
|
if (where < 8) {
|
|
pci_config_read16((u16 *)addr, &tmp16);
|
|
*value = (u32) tmp16;
|
|
} else {
|
|
pci_config_read8((u8 *)addr, &tmp8);
|
|
*value = (u32) tmp8;
|
|
pci_config_read8(((u8 *)addr) + 1, &tmp8);
|
|
*value |= ((u32) tmp8) << 8;
|
|
}
|
|
break;
|
|
|
|
case 4:
|
|
tmp32 = 0xffffffff;
|
|
sun4u_read_pci_cfg_host(pbm, bus, devfn,
|
|
where, 2, &tmp32);
|
|
*value = tmp32;
|
|
|
|
tmp32 = 0xffffffff;
|
|
sun4u_read_pci_cfg_host(pbm, bus, devfn,
|
|
where + 2, 2, &tmp32);
|
|
*value |= tmp32 << 16;
|
|
break;
|
|
}
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
static int sun4u_read_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn,
|
|
int where, int size, u32 *value)
|
|
{
|
|
struct pci_pbm_info *pbm = bus_dev->sysdata;
|
|
unsigned char bus = bus_dev->number;
|
|
u32 *addr;
|
|
u16 tmp16;
|
|
u8 tmp8;
|
|
|
|
switch (size) {
|
|
case 1:
|
|
*value = 0xff;
|
|
break;
|
|
case 2:
|
|
*value = 0xffff;
|
|
break;
|
|
case 4:
|
|
*value = 0xffffffff;
|
|
break;
|
|
}
|
|
|
|
if (!bus_dev->number && !PCI_SLOT(devfn))
|
|
return sun4u_read_pci_cfg_host(pbm, bus, devfn, where,
|
|
size, value);
|
|
|
|
addr = sun4u_config_mkaddr(pbm, bus, devfn, where);
|
|
if (!addr)
|
|
return PCIBIOS_SUCCESSFUL;
|
|
|
|
switch (size) {
|
|
case 1:
|
|
pci_config_read8((u8 *)addr, &tmp8);
|
|
*value = (u32) tmp8;
|
|
break;
|
|
|
|
case 2:
|
|
if (where & 0x01) {
|
|
printk("pci_read_config_word: misaligned reg [%x]\n",
|
|
where);
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|
|
pci_config_read16((u16 *)addr, &tmp16);
|
|
*value = (u32) tmp16;
|
|
break;
|
|
|
|
case 4:
|
|
if (where & 0x03) {
|
|
printk("pci_read_config_dword: misaligned reg [%x]\n",
|
|
where);
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|
|
pci_config_read32(addr, value);
|
|
break;
|
|
}
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
static int sun4u_write_pci_cfg_host(struct pci_pbm_info *pbm,
|
|
unsigned char bus, unsigned int devfn,
|
|
int where, int size, u32 value)
|
|
{
|
|
u32 *addr;
|
|
|
|
addr = sun4u_config_mkaddr(pbm, bus, devfn, where);
|
|
if (!addr)
|
|
return PCIBIOS_SUCCESSFUL;
|
|
|
|
switch (size) {
|
|
case 1:
|
|
if (where < 8) {
|
|
unsigned long align = (unsigned long) addr;
|
|
u16 tmp16;
|
|
|
|
align &= ~1;
|
|
pci_config_read16((u16 *)align, &tmp16);
|
|
if (where & 1) {
|
|
tmp16 &= 0x00ff;
|
|
tmp16 |= value << 8;
|
|
} else {
|
|
tmp16 &= 0xff00;
|
|
tmp16 |= value;
|
|
}
|
|
pci_config_write16((u16 *)align, tmp16);
|
|
} else
|
|
pci_config_write8((u8 *)addr, value);
|
|
break;
|
|
case 2:
|
|
if (where < 8) {
|
|
pci_config_write16((u16 *)addr, value);
|
|
} else {
|
|
pci_config_write8((u8 *)addr, value & 0xff);
|
|
pci_config_write8(((u8 *)addr) + 1, value >> 8);
|
|
}
|
|
break;
|
|
case 4:
|
|
sun4u_write_pci_cfg_host(pbm, bus, devfn,
|
|
where, 2, value & 0xffff);
|
|
sun4u_write_pci_cfg_host(pbm, bus, devfn,
|
|
where + 2, 2, value >> 16);
|
|
break;
|
|
}
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
static int sun4u_write_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn,
|
|
int where, int size, u32 value)
|
|
{
|
|
struct pci_pbm_info *pbm = bus_dev->sysdata;
|
|
unsigned char bus = bus_dev->number;
|
|
u32 *addr;
|
|
|
|
if (!bus_dev->number && !PCI_SLOT(devfn))
|
|
return sun4u_write_pci_cfg_host(pbm, bus, devfn, where,
|
|
size, value);
|
|
|
|
addr = sun4u_config_mkaddr(pbm, bus, devfn, where);
|
|
if (!addr)
|
|
return PCIBIOS_SUCCESSFUL;
|
|
|
|
switch (size) {
|
|
case 1:
|
|
pci_config_write8((u8 *)addr, value);
|
|
break;
|
|
|
|
case 2:
|
|
if (where & 0x01) {
|
|
printk("pci_write_config_word: misaligned reg [%x]\n",
|
|
where);
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|
|
pci_config_write16((u16 *)addr, value);
|
|
break;
|
|
|
|
case 4:
|
|
if (where & 0x03) {
|
|
printk("pci_write_config_dword: misaligned reg [%x]\n",
|
|
where);
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|
|
pci_config_write32(addr, value);
|
|
}
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
struct pci_ops sun4u_pci_ops = {
|
|
.read = sun4u_read_pci_cfg,
|
|
.write = sun4u_write_pci_cfg,
|
|
};
|
|
|
|
static int sun4v_read_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn,
|
|
int where, int size, u32 *value)
|
|
{
|
|
struct pci_pbm_info *pbm = bus_dev->sysdata;
|
|
u32 devhandle = pbm->devhandle;
|
|
unsigned int bus = bus_dev->number;
|
|
unsigned int device = PCI_SLOT(devfn);
|
|
unsigned int func = PCI_FUNC(devfn);
|
|
unsigned long ret;
|
|
|
|
if (!bus && devfn == 0x00)
|
|
return pci_host_bridge_read_pci_cfg(bus_dev, devfn, where,
|
|
size, value);
|
|
if (config_out_of_range(pbm, bus, devfn, where)) {
|
|
ret = ~0UL;
|
|
} else {
|
|
ret = pci_sun4v_config_get(devhandle,
|
|
HV_PCI_DEVICE_BUILD(bus, device, func),
|
|
where, size);
|
|
}
|
|
switch (size) {
|
|
case 1:
|
|
*value = ret & 0xff;
|
|
break;
|
|
case 2:
|
|
*value = ret & 0xffff;
|
|
break;
|
|
case 4:
|
|
*value = ret & 0xffffffff;
|
|
break;
|
|
};
|
|
|
|
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
static int sun4v_write_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn,
|
|
int where, int size, u32 value)
|
|
{
|
|
struct pci_pbm_info *pbm = bus_dev->sysdata;
|
|
u32 devhandle = pbm->devhandle;
|
|
unsigned int bus = bus_dev->number;
|
|
unsigned int device = PCI_SLOT(devfn);
|
|
unsigned int func = PCI_FUNC(devfn);
|
|
unsigned long ret;
|
|
|
|
if (!bus && devfn == 0x00)
|
|
return pci_host_bridge_write_pci_cfg(bus_dev, devfn, where,
|
|
size, value);
|
|
if (config_out_of_range(pbm, bus, devfn, where)) {
|
|
/* Do nothing. */
|
|
} else {
|
|
ret = pci_sun4v_config_put(devhandle,
|
|
HV_PCI_DEVICE_BUILD(bus, device, func),
|
|
where, size, value);
|
|
}
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
struct pci_ops sun4v_pci_ops = {
|
|
.read = sun4v_read_pci_cfg,
|
|
.write = sun4v_write_pci_cfg,
|
|
};
|
|
|
|
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, size;
|
|
u32 parent_phys_hi, parent_phys_lo;
|
|
u32 size_hi, size_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;
|
|
|
|
size_hi = pr->size_hi;
|
|
size_lo = pr->size_lo;
|
|
|
|
type = (pr->child_phys_hi >> 24) & 0x3;
|
|
a = (((unsigned long)parent_phys_hi << 32UL) |
|
|
((unsigned long)parent_phys_lo << 0UL));
|
|
size = (((unsigned long)size_hi << 32UL) |
|
|
((unsigned long)size_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 + size - 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 + size - 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);
|
|
}
|