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/*
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2001-2002 Silicon Graphics, Inc. All rights reserved.
*/
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/byteorder/swab.h>
#include <asm/sn/sgi.h>
#include <asm/sn/sn_cpuid.h>
#include <asm/sn/addrs.h>
#include <asm/sn/arch.h>
#include <asm/sn/iograph.h>
#include <asm/sn/invent.h>
#include <asm/sn/hcl.h>
#include <asm/sn/labelcl.h>
#include <asm/sn/xtalk/xwidget.h>
#include <asm/sn/pci/bridge.h>
#include <asm/sn/pci/pciio.h>
#include <asm/sn/pci/pcibr.h>
#include <asm/sn/pci/pcibr_private.h>
#include <asm/sn/pci/pci_defs.h>
#include <asm/sn/prio.h>
#include <asm/sn/xtalk/xbow.h>
#include <asm/sn/ioc3.h>
#include <asm/sn/eeprom.h>
#include <asm/sn/io.h>
#include <asm/sn/sn_private.h>
extern pcibr_info_t pcibr_info_get(devfs_handle_t);
uint64_t pcibr_config_get(devfs_handle_t, unsigned, unsigned);
uint64_t do_pcibr_config_get(int, cfg_p, unsigned, unsigned);
void pcibr_config_set(devfs_handle_t, unsigned, unsigned, uint64_t);
void do_pcibr_config_set(int, cfg_p, unsigned, unsigned, uint64_t);
static void swap_do_pcibr_config_set(cfg_p, unsigned, unsigned, uint64_t);
#ifdef LITTLE_ENDIAN
/*
* on sn-ia we need to twiddle the the addresses going out
* the pci bus because we use the unswizzled synergy space
* (the alternative is to use the swizzled synergy space
* and byte swap the data)
*/
#define CB(b,r) (((volatile uint8_t *) b)[((r)^4)])
#define CS(b,r) (((volatile uint16_t *) b)[((r^4)/2)])
#define CW(b,r) (((volatile uint32_t *) b)[((r^4)/4)])
#define CBP(b,r) (((volatile uint8_t *) b)[(r)^3])
#define CSP(b,r) (((volatile uint16_t *) b)[((r)/2)^1])
#define CWP(b,r) (((volatile uint32_t *) b)[(r)/4])
#define SCB(b,r) (((volatile uint8_t *) b)[((r)^3)])
#define SCS(b,r) (((volatile uint16_t *) b)[((r^2)/2)])
#define SCW(b,r) (((volatile uint32_t *) b)[((r)/4)])
#else
#define CB(b,r) (((volatile uint8_t *) cfgbase)[(r)^3])
#define CS(b,r) (((volatile uint16_t *) cfgbase)[((r)/2)^1])
#define CW(b,r) (((volatile uint32_t *) cfgbase)[(r)/4])
#endif
/*
* Return a config space address for given slot / func / offset. Note the
* returned pointer is a 32bit word (ie. cfg_p) aligned pointer pointing to
* the 32bit word that contains the "offset" byte.
*/
cfg_p
pcibr_func_config_addr(bridge_t *bridge, pciio_bus_t bus, pciio_slot_t slot,
pciio_function_t func, int offset)
{
/*
* Type 1 config space
*/
if (bus > 0) {
bridge->b_pci_cfg = ((bus << 16) | (slot << 11));
return &bridge->b_type1_cfg.f[func].l[(offset)];
}
/*
* Type 0 config space
*/
if (is_pic(bridge))
slot++;
return &bridge->b_type0_cfg_dev[slot].f[func].l[offset];
}
/*
* Return config space address for given slot / offset. Note the returned
* pointer is a 32bit word (ie. cfg_p) aligned pointer pointing to the
* 32bit word that contains the "offset" byte.
*/
cfg_p
pcibr_slot_config_addr(bridge_t *bridge, pciio_slot_t slot, int offset)
{
return pcibr_func_config_addr(bridge, 0, slot, 0, offset);
}
/*
* Return config space data for given slot / offset
*/
unsigned
pcibr_slot_config_get(bridge_t *bridge, pciio_slot_t slot, int offset)
{
cfg_p cfg_base;
cfg_base = pcibr_slot_config_addr(bridge, slot, 0);
return (do_pcibr_config_get(is_pic(bridge), cfg_base, offset, sizeof(unsigned)));
}
/*
* Return config space data for given slot / func / offset
*/
unsigned
pcibr_func_config_get(bridge_t *bridge, pciio_slot_t slot,
pciio_function_t func, int offset)
{
cfg_p cfg_base;
cfg_base = pcibr_func_config_addr(bridge, 0, slot, func, 0);
return (do_pcibr_config_get(is_pic(bridge), cfg_base, offset, sizeof(unsigned)));
}
/*
* Set config space data for given slot / offset
*/
void
pcibr_slot_config_set(bridge_t *bridge, pciio_slot_t slot,
int offset, unsigned val)
{
cfg_p cfg_base;
cfg_base = pcibr_slot_config_addr(bridge, slot, 0);
do_pcibr_config_set(is_pic(bridge), cfg_base, offset, sizeof(unsigned), val);
}
/*
* Set config space data for given slot / func / offset
*/
void
pcibr_func_config_set(bridge_t *bridge, pciio_slot_t slot,
pciio_function_t func, int offset, unsigned val)
{
cfg_p cfg_base;
cfg_base = pcibr_func_config_addr(bridge, 0, slot, func, 0);
do_pcibr_config_set(is_pic(bridge), cfg_base, offset, sizeof(unsigned), val);
}
int pcibr_config_debug = 0;
cfg_p
pcibr_config_addr(devfs_handle_t conn,
unsigned reg)
{
pcibr_info_t pcibr_info;
pciio_bus_t pciio_bus;
pciio_slot_t pciio_slot;
pciio_function_t pciio_func;
pcibr_soft_t pcibr_soft;
bridge_t *bridge;
cfg_p cfgbase = (cfg_p)0;
pciio_info_t pciio_info;
pciio_info = pciio_info_get(conn);
pcibr_info = pcibr_info_get(conn);
/*
* Determine the PCI bus/slot/func to generate a config address for.
*/
if (pciio_info_type1_get(pciio_info)) {
/*
* Conn is a vhdl which uses TYPE 1 addressing explicitly passed
* in reg.
*/
pciio_bus = PCI_TYPE1_BUS(reg);
pciio_slot = PCI_TYPE1_SLOT(reg);
pciio_func = PCI_TYPE1_FUNC(reg);
ASSERT(pciio_bus != 0);
#if 0
} else if (conn != pciio_info_hostdev_get(pciio_info)) {
/*
* Conn is on a subordinate bus, so get bus/slot/func directly from
* its pciio_info_t structure.
*/
pciio_bus = pciio_info->c_bus;
pciio_slot = pciio_info->c_slot;
pciio_func = pciio_info->c_func;
if (pciio_func == PCIIO_FUNC_NONE) {
pciio_func = 0;
}
#endif
} else {
/*
* Conn is directly connected to the host bus. PCI bus number is
* hardcoded to 0 (even though it may have a logical bus number != 0)
* and slot/function are derived from the pcibr_info_t associated
* with the device.
*/
pciio_bus = 0;
pciio_slot = PCIBR_INFO_SLOT_GET_INT(pcibr_info);
if (pciio_slot == PCIIO_SLOT_NONE)
pciio_slot = PCI_TYPE1_SLOT(reg);
pciio_func = pcibr_info->f_func;
if (pciio_func == PCIIO_FUNC_NONE)
pciio_func = PCI_TYPE1_FUNC(reg);
}
pcibr_soft = (pcibr_soft_t) pcibr_info->f_mfast;
bridge = pcibr_soft->bs_base;
cfgbase = pcibr_func_config_addr(bridge,
pciio_bus, pciio_slot, pciio_func, 0);
return cfgbase;
}
extern unsigned char Is_pic_on_this_nasid[];
uint64_t
pcibr_config_get(devfs_handle_t conn,
unsigned reg,
unsigned size)
{
if ( !Is_pic_on_this_nasid[ NASID_GET((pcibr_config_addr(conn, reg)))] )
return do_pcibr_config_get(0, pcibr_config_addr(conn, reg),
PCI_TYPE1_REG(reg), size);
else
return do_pcibr_config_get(1, pcibr_config_addr(conn, reg),
PCI_TYPE1_REG(reg), size);
}
uint64_t
do_pcibr_config_get(
int pic,
cfg_p cfgbase,
unsigned reg,
unsigned size)
{
unsigned value;
if ( pic ) {
value = CWP(cfgbase, reg);
}
else {
if ( io_get_sh_swapper(NASID_GET(cfgbase)) ) {
/*
* Shub Swapper on - 0 returns PCI Offset 0 but byte swapped!
* Do not swizzle address and byte swap the result.
*/
value = SCW(cfgbase, reg);
value = __swab32(value);
} else {
value = CW(cfgbase, reg);
}
}
if (reg & 3)
value >>= 8 * (reg & 3);
if (size < 4)
value &= (1 << (8 * size)) - 1;
return value;
}
void
pcibr_config_set(devfs_handle_t conn,
unsigned reg,
unsigned size,
uint64_t value)
{
if ( Is_pic_on_this_nasid[ NASID_GET((pcibr_config_addr(conn, reg)))] )
do_pcibr_config_set(1, pcibr_config_addr(conn, reg),
PCI_TYPE1_REG(reg), size, value);
else
swap_do_pcibr_config_set(pcibr_config_addr(conn, reg),
PCI_TYPE1_REG(reg), size, value);
}
void
do_pcibr_config_set(int pic,
cfg_p cfgbase,
unsigned reg,
unsigned size,
uint64_t value)
{
if ( pic ) {
switch (size) {
case 1:
CBP(cfgbase, reg) = value;
break;
case 2:
if (reg & 1) {
CBP(cfgbase, reg) = value;
CBP(cfgbase, reg + 1) = value >> 8;
} else
CSP(cfgbase, reg) = value;
break;
case 3:
if (reg & 1) {
CBP(cfgbase, reg) = value;
CSP(cfgbase, (reg + 1)) = value >> 8;
} else {
CSP(cfgbase, reg) = value;
CBP(cfgbase, reg + 2) = value >> 16;
}
break;
case 4:
CWP(cfgbase, reg) = value;
break;
}
}
else {
switch (size) {
case 1:
CB(cfgbase, reg) = value;
break;
case 2:
if (reg & 1) {
CB(cfgbase, reg) = value;
CB(cfgbase, reg + 1) = value >> 8;
} else
CS(cfgbase, reg) = value;
break;
case 3:
if (reg & 1) {
CB(cfgbase, reg) = value;
CS(cfgbase, (reg + 1)) = value >> 8;
} else {
CS(cfgbase, reg) = value;
CB(cfgbase, reg + 2) = value >> 16;
}
break;
case 4:
CW(cfgbase, reg) = value;
break;
}
}
}
void
swap_do_pcibr_config_set(cfg_p cfgbase,
unsigned reg,
unsigned size,
uint64_t value)
{
uint64_t temp_value = 0;
switch (size) {
case 1:
SCB(cfgbase, reg) = value;
break;
case 2:
temp_value = __swab16(value);
if (reg & 1) {
SCB(cfgbase, reg) = temp_value;
SCB(cfgbase, reg + 1) = temp_value >> 8;
} else
SCS(cfgbase, reg) = temp_value;
break;
case 3:
BUG();
break;
case 4:
temp_value = __swab32(value);
SCW(cfgbase, reg) = temp_value;
break;
}
}
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