/*
* PCIEHPRM ACPI: PHP Resource Manager for ACPI platform
*
* Copyright (C) 2003-2004 Intel Corporation
*
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
* NON INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Send feedback to <kristen.c.accardi@intel.com>
*
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/acpi.h>
#include <linux/efi.h>
#include <linux/pci-acpi.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#ifdef CONFIG_IA64
#include <asm/iosapic.h>
#endif
#include <acpi/acpi.h>
#include <acpi/acpi_bus.h>
#include <acpi/actypes.h>
#include "pciehp.h"
#include "pciehprm.h"
#define PCI_MAX_BUS 0x100
#define ACPI_STA_DEVICE_PRESENT 0x01
#define METHOD_NAME__SUN "_SUN"
#define METHOD_NAME__HPP "_HPP"
#define METHOD_NAME_OSHP "OSHP"
/* Status code for running acpi method to gain native control */
#define NC_NOT_RUN 0
#define OSC_NOT_EXIST 1
#define OSC_RUN_FAILED 2
#define OSHP_NOT_EXIST 3
#define OSHP_RUN_FAILED 4
#define NC_RUN_SUCCESS 5
#define PHP_RES_BUS 0xA0
#define PHP_RES_IO 0xA1
#define PHP_RES_MEM 0xA2
#define PHP_RES_PMEM 0xA3
#define BRIDGE_TYPE_P2P 0x00
#define BRIDGE_TYPE_HOST 0x01
/* this should go to drivers/acpi/include/ */
struct acpi__hpp {
u8 cache_line_size;
u8 latency_timer;
u8 enable_serr;
u8 enable_perr;
};
struct acpi_php_slot {
struct acpi_php_slot *next;
struct acpi_bridge *bridge;
acpi_handle handle;
int seg;
int bus;
int dev;
int fun;
u32 sun;
struct pci_resource *mem_head;
struct pci_resource *p_mem_head;
struct pci_resource *io_head;
struct pci_resource *bus_head;
void *slot_ops; /* _STA, _EJx, etc */
struct slot *slot;
}; /* per func */
struct acpi_bridge {
struct acpi_bridge *parent;
struct acpi_bridge *next;
struct acpi_bridge *child;
acpi_handle handle;
int seg;
int pbus; /* pdev->bus->number */
int pdevice; /* PCI_SLOT(pdev->devfn) */
int pfunction; /* PCI_DEVFN(pdev->devfn) */
int bus; /* pdev->subordinate->number */
struct acpi__hpp *_hpp;
struct acpi_php_slot *slots;
struct pci_resource *tmem_head; /* total from crs */
struct pci_resource *tp_mem_head; /* total from crs */
struct pci_resource *tio_head; /* total from crs */
struct pci_resource *tbus_head; /* total from crs */
struct pci_resource *mem_head; /* available */
struct pci_resource *p_mem_head; /* available */
struct pci_resource *io_head; /* available */
struct pci_resource *bus_head; /* available */
int scanned;
int type;
};
static struct acpi_bridge *acpi_bridges_head;
static u8 * acpi_path_name( acpi_handle handle)
{
acpi_status status;
static u8 path_name[ACPI_PATHNAME_MAX];
struct acpi_buffer ret_buf = { ACPI_PATHNAME_MAX, path_name };
memset(path_name, 0, sizeof (path_name));
status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &ret_buf);
if (ACPI_FAILURE(status))
return NULL;
else
return path_name;
}
static void acpi_get__hpp ( struct acpi_bridge *ab);
static int acpi_run_oshp ( struct acpi_bridge *ab);
static int osc_run_status = NC_NOT_RUN;
static int oshp_run_status = NC_NOT_RUN;
static int acpi_add_slot_to_php_slots(
struct acpi_bridge *ab,
int bus_num,
acpi_handle handle,
u32 adr,
u32 sun
)
{
struct acpi_php_slot *aps;
static long samesun = -1;
aps = (struct acpi_php_slot *) kmalloc (sizeof(struct acpi_php_slot), GFP_KERNEL);
if (!aps) {
err ("acpi_pciehprm: alloc for aps fail\n");
return -1;
}
memset(aps, 0, sizeof(struct acpi_php_slot));
aps->handle = handle;
aps->bus = bus_num;
aps->dev = (adr >> 16) & 0xffff;
aps->fun = adr & 0xffff;
aps->sun = sun;
aps->next = ab->slots; /* cling to the bridge */
aps->bridge = ab;
ab->slots = aps;
ab->scanned += 1;
if (!ab->_hpp)
acpi_get__hpp(ab);
if (osc_run_status == OSC_NOT_EXIST)
oshp_run_status = acpi_run_oshp(ab);
if (sun != samesun) {
info("acpi_pciehprm: Slot sun(%x) at s:b:d:f=0x%02x:%02x:%02x:%02x\n",
aps->sun, ab->seg, aps->bus, aps->dev, aps->fun);
samesun = sun;
}
return 0;
}
static void acpi_get__hpp ( struct acpi_bridge *ab)
{
acpi_status status;
u8 nui[4];
struct acpi_buffer ret_buf = { 0, NULL};
union acpi_object *ext_obj, *package;
u8 *path_name = acpi_path_name(ab->handle);
int i, len = 0;
/* get _hpp */
status = acpi_evaluate_object(ab->handle, METHOD_NAME__HPP, NULL, &ret_buf);
switch (status) {
case AE_BUFFER_OVERFLOW:
ret_buf.pointer = kmalloc (ret_buf.length, GFP_KERNEL);
if (!ret_buf.pointer) {
err ("acpi_pciehprm:%s alloc for _HPP fail\n", path_name);
return;
}
status = acpi_evaluate_object(ab->handle, METHOD_NAME__HPP, NULL, &ret_buf);
if (ACPI_SUCCESS(status))
break;
default:
if (ACPI_FAILURE(status)) {
err("acpi_pciehprm:%s _HPP fail=0x%x\n", path_name, status);
return;
}
}
ext_obj = (union acpi_object *) ret_buf.pointer;
if (ext_obj->type != ACPI_TYPE_PACKAGE) {
err ("acpi_pciehprm:%s _HPP obj not a package\n", path_name);
goto free_and_return;
}
len = ext_obj->package.count;
package = (union acpi_object *) ret_buf.pointer;
for ( i = 0; (i < len) || (i < 4); i++) {
ext_obj = (union acpi_object *) &package->package.elements[i];
switch (ext_obj->type) {
case ACPI_TYPE_INTEGER:
nui[i] = (u8)ext_obj->integer.value;
break;
default:
err ("acpi_pciehprm:%s _HPP obj type incorrect\n", path_name);
goto free_and_return;
}
}
ab->_hpp = kmalloc (sizeof (struct acpi__hpp), GFP_KERNEL);
if (!ab->_hpp) {
err ("acpi_pciehprm:%s alloc for _HPP failed\n", path_name);
goto free_and_return;
}
memset(ab->_hpp, 0, sizeof(struct acpi__hpp));
ab->_hpp->cache_line_size = nui[0];
ab->_hpp->latency_timer = nui[1];
ab->_hpp->enable_serr = nui[2];
ab->_hpp->enable_perr = nui[3];
dbg(" _HPP: cache_line_size=0x%x\n", ab->_hpp->cache_line_size);
dbg(" _HPP: latency timer =0x%x\n", ab->_hpp->latency_timer);
dbg(" _HPP: enable SERR =0x%x\n", ab->_hpp->enable_serr);
dbg(" _HPP: enable PERR =0x%x\n", ab->_hpp->enable_perr);
free_and_return:
kfree(ret_buf.pointer);
}
static int acpi_run_oshp ( struct acpi_bridge *ab)
{
acpi_status status;
u8 *path_name = acpi_path_name(ab->handle);
/* run OSHP */
status = acpi_evaluate_object(ab->handle, METHOD_NAME_OSHP, NULL, NULL);
if (ACPI_FAILURE(status)) {
err("acpi_pciehprm:%s OSHP fails=0x%x\n", path_name, status);
oshp_run_status = (status == AE_NOT_FOUND) ? OSHP_NOT_EXIST : OSHP_RUN_FAILED;
} else {
oshp_run_status = NC_RUN_SUCCESS;
dbg("acpi_pciehprm:%s OSHP passes =0x%x\n", path_name, status);
dbg("acpi_pciehprm:%s oshp_run_status =0x%x\n", path_name, oshp_run_status);
}
return oshp_run_status;
}
static acpi_status acpi_evaluate_crs(
acpi_handle handle,
struct acpi_resource **retbuf
)
{
acpi_status status;
struct acpi_buffer crsbuf;
u8 *path_name = acpi_path_name(handle);
crsbuf.length = 0;
crsbuf.pointer = NULL;
status = acpi_get_current_resources (handle, &crsbuf);
switch (status) {
case AE_BUFFER_OVERFLOW:
break; /* found */
case AE_NOT_FOUND:
dbg("acpi_pciehprm:%s _CRS not found\n", path_name);
return status;
default:
err ("acpi_pciehprm:%s _CRS fail=0x%x\n", path_name, status);
return status;
}
crsbuf.pointer = kmalloc (crsbuf.length, GFP_KERNEL);
if (!crsbuf.pointer) {
err ("acpi_pciehprm: alloc %ld bytes for %s _CRS fail\n", (ulong)crsbuf.length, path_name);
return AE_NO_MEMORY;
}
status = acpi_get_current_resources (handle, &crsbuf);
if (ACPI_FAILURE(status)) {
err("acpi_pciehprm: %s _CRS fail=0x%x.\n", path_name, status);
kfree(crsbuf.pointer);
return status;
}
*retbuf = crsbuf.pointer;
return status;
}
static void free_pci_resource ( struct pci_resource *aprh)
{
struct pci_resource *res, *next;
for (res = aprh; res; res = next) {
next = res->next;
kfree(res);
}
}
static void print_pci_resource ( struct pci_resource *aprh)
{
struct pci_resource *res;
for (res = aprh; res; res = res->next)
dbg(" base= 0x%x length= 0x%x\n", res->base, res->length);
}
static void print_slot_resources( struct acpi_php_slot *aps)
{
if (aps->bus_head) {
dbg(" BUS Resources:\n");
print_pci_resource (aps->bus_head);
}
if (aps->io_head) {
dbg(" IO Resources:\n");
print_pci_resource (aps->io_head);
}
if (aps->mem_head) {
dbg(" MEM Resources:\n");
print_pci_resource (aps->mem_head);
}
if (aps->p_mem_head) {
dbg(" PMEM Resources:\n");
print_pci_resource (aps->p_mem_head);
}
}
static void print_pci_resources( struct acpi_bridge *ab)
{
if (ab->tbus_head) {
dbg(" Total BUS Resources:\n");
print_pci_resource (ab->tbus_head);
}
if (ab->bus_head) {
dbg(" BUS Resources:\n");
print_pci_resource (ab->bus_head);
}
if (ab->tio_head) {
dbg(" Total IO Resources:\n");
print_pci_resource (ab->tio_head);
}
if (ab->io_head) {
dbg(" IO Resources:\n");
print_pci_resource (ab->io_head);
}
if (ab->tmem_head) {
dbg(" Total MEM Resources:\n");
print_pci_resource (ab->tmem_head);
}
if (ab->mem_head) {
dbg(" MEM Resources:\n");
print_pci_resource (ab->mem_head);
}
if (ab->tp_mem_head) {
dbg(" Total PMEM Resources:\n");
print_pci_resource (ab->tp_mem_head);
}
if (ab->p_mem_head) {
dbg(" PMEM Resources:\n");
print_pci_resource (ab->p_mem_head);
}
if (ab->_hpp) {
dbg(" _HPP: cache_line_size=0x%x\n", ab->_hpp->cache_line_size);
dbg(" _HPP: latency timer =0x%x\n", ab->_hpp->latency_timer);
dbg(" _HPP: enable SERR =0x%x\n", ab->_hpp->enable_serr);
dbg(" _HPP: enable PERR =0x%x\n", ab->_hpp->enable_perr);
}
}
static int pciehprm_delete_resource(
struct pci_resource **aprh,
ulong base,
ulong size)
{
struct pci_resource *res;
struct pci_resource *prevnode;
struct pci_resource *split_node;
ulong tbase;
pciehp_resource_sort_and_combine(aprh);
for (res = *aprh; res; res = res->next) {
if (res->base > base)
continue;
if ((res->base + res->length) < (base + size))
continue;
if (res->base < base) {
tbase = base;
if ((res->length - (tbase - res->base)) < size)
continue;
split_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
if (!split_node)
return -ENOMEM;
split_node->base = res->base;
split_node->length = tbase - res->base;
res->base = tbase;
res->length -= split_node->length;
split_node->next = res->next;
res->next = split_node;
}
if (res->length >= size) {
split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
if (!split_node)
return -ENOMEM;
split_node->base = res->base + size;
split_node->length = res->length - size;
res->length = size;
split_node->next = res->next;
res->next = split_node;
}
if (*aprh == res) {
*aprh = res->next;
} else {
prevnode = *aprh;
while (prevnode->next != res)
prevnode = prevnode->next;
prevnode->next = res->next;
}
res->next = NULL;
kfree(res);
break;
}
return 0;
}
static int pciehprm_delete_resources(
struct pci_resource **aprh,
struct pci_resource *this
)
{
struct pci_resource *res;
for (res = this; res; res = res->next)
pciehprm_delete_resource(aprh, res->base, res->length);
return 0;
}
static int pciehprm_add_resource(
struct pci_resource **aprh,
ulong base,
ulong size)
{
struct pci_resource *res;
for (res = *aprh; res; res = res->next) {
if ((res->base + res->length) == base) {
res->length += size;
size = 0L;
break;
}
if (res->next == *aprh)
break;
}
if (size) {
res = kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
if (!res) {
err ("acpi_pciehprm: alloc for res fail\n");
return -ENOMEM;
}
memset(res, 0, sizeof (struct pci_resource));
res->base = base;
res->length = size;
res->next = *aprh;
*aprh = res;
}
return 0;
}
static int pciehprm_add_resources(
struct pci_resource **aprh,
struct pci_resource *this
)
{
struct pci_resource *res;
int rc = 0;
for (res = this; res && !rc; res = res->next)
rc = pciehprm_add_resource(aprh, res->base, res->length);
return rc;
}
static void acpi_parse_io (
struct acpi_bridge *ab,
union acpi_resource_data *data
)
{
struct acpi_resource_io *dataio;
dataio = (struct acpi_resource_io *) data;
dbg("Io Resource\n");
dbg(" %d bit decode\n", ACPI_DECODE_16 == dataio->io_decode ? 16:10);
dbg(" Range minimum base: %08X\n", dataio->min_base_address);
dbg(" Range maximum base: %08X\n", dataio->max_base_address);
dbg(" Alignment: %08X\n", dataio->alignment);
dbg(" Range Length: %08X\n", dataio->range_length);
}
static void acpi_parse_fixed_io (
struct acpi_bridge *ab,
union acpi_resource_data *data
)
{
struct acpi_resource_fixed_io *datafio;
datafio = (struct acpi_resource_fixed_io *) data;
dbg("Fixed Io Resource\n");
dbg(" Range base address: %08X", datafio->base_address);
dbg(" Range length: %08X", datafio->range_length);
}
static void acpi_parse_address16_32 (
struct acpi_bridge *ab,
union acpi_resource_data *data,
acpi_resource_type id
)
{
/*
* acpi_resource_address16 == acpi_resource_address32
* acpi_resource_address16 *data16 = (acpi_resource_address16 *) data;
*/
struct acpi_resource_address32 *data32 = (struct acpi_resource_address32 *) data;
struct pci_resource **aprh, **tprh;
if (id == ACPI_RSTYPE_ADDRESS16)
dbg("acpi_pciehprm:16-Bit Address Space Resource\n");
else
dbg("acpi_pciehprm:32-Bit Address Space Resource\n");
switch (data32->resource_type) {
case ACPI_MEMORY_RANGE:
dbg(" Resource Type: Memory Range\n");
aprh = &ab->mem_head;
tprh = &ab->tmem_head;
switch (data32->attribute.memory.cache_attribute) {
case ACPI_NON_CACHEABLE_MEMORY:
dbg(" Type Specific: Noncacheable memory\n");
break;
case ACPI_CACHABLE_MEMORY:
dbg(" Type Specific: Cacheable memory\n");
break;
case ACPI_WRITE_COMBINING_MEMORY:
dbg(" Type Specific: Write-combining memory\n");
break;
case ACPI_PREFETCHABLE_MEMORY:
aprh = &ab->p_mem_head;
dbg(" Type Specific: Prefetchable memory\n");
break;
default:
dbg(" Type Specific: Invalid cache attribute\n");
break;
}
dbg(" Type Specific: Read%s\n", ACPI_READ_WRITE_MEMORY == data32->attribute.memory.read_write_attribute ? "/Write":" Only");
break;
case ACPI_IO_RANGE:
dbg(" Resource Type: I/O Range\n");
aprh = &ab->io_head;
tprh = &ab->tio_head;
switch (data32->attribute.io.range_attribute) {
case ACPI_NON_ISA_ONLY_RANGES:
dbg(" Type Specific: Non-ISA Io Addresses\n");
break;
case ACPI_ISA_ONLY_RANGES:
dbg(" Type Specific: ISA Io Addresses\n");
break;
case ACPI_ENTIRE_RANGE:
dbg(" Type Specific: ISA and non-ISA Io Addresses\n");
break;
default:
dbg(" Type Specific: Invalid range attribute\n");
break;
}
break;
case ACPI_BUS_NUMBER_RANGE:
dbg(" Resource Type: Bus Number Range(fixed)\n");
/* fixup to be compatible with the rest of php driver */
data32->min_address_range++;
data32->address_length--;
aprh = &ab->bus_head;
tprh = &ab->tbus_head;
break;
default:
dbg(" Resource Type: Invalid resource type. Exiting.\n");
return;
}
dbg(" Resource %s\n", ACPI_CONSUMER == data32->producer_consumer ? "Consumer":"Producer");
dbg(" %s decode\n", ACPI_SUB_DECODE == data32->decode ? "Subtractive":"Positive");
dbg(" Min address is %s fixed\n", ACPI_ADDRESS_FIXED == data32->min_address_fixed ? "":"not");
dbg(" Max address is %s fixed\n", ACPI_ADDRESS_FIXED == data32->max_address_fixed ? "":"not");
dbg(" Granularity: %08X\n", data32->granularity);
dbg(" Address range min: %08X\n", data32->min_address_range);
dbg(" Address range max: %08X\n", data32->max_address_range);
dbg(" Address translation offset: %08X\n", data32->address_translation_offset);
dbg(" Address Length: %08X\n", data32->address_length);
if (0xFF != data32->resource_source.index) {
dbg(" Resource Source Index: %X\n", data32->resource_source.index);
/* dbg(" Resource Source: %s\n", data32->resource_source.string_ptr); */
}
pciehprm_add_resource(aprh, data32->min_address_range, data32->address_length);
}
static acpi_status acpi_parse_crs(
struct acpi_bridge *ab,
struct acpi_resource *crsbuf
)
{
acpi_status status = AE_OK;
struct acpi_resource *resource = crsbuf;
u8 count = 0;
u8 done = 0;
while (!done) {
dbg("acpi_pciehprm: PCI bus 0x%x Resource structure %x.\n", ab->bus, count++);
switch (resource->id) {
case ACPI_RSTYPE_IRQ:
dbg("Irq -------- Resource\n");
break;
case ACPI_RSTYPE_DMA:
dbg("DMA -------- Resource\n");
break;
case ACPI_RSTYPE_START_DPF:
dbg("Start DPF -------- Resource\n");
break;
case ACPI_RSTYPE_END_DPF:
dbg("End DPF -------- Resource\n");
break;
case ACPI_RSTYPE_IO:
acpi_parse_io (ab, &resource->data);
break;
case ACPI_RSTYPE_FIXED_IO:
acpi_parse_fixed_io (ab, &resource->data);
break;
case ACPI_RSTYPE_VENDOR:
dbg("Vendor -------- Resource\n");
break;
case ACPI_RSTYPE_END_TAG:
dbg("End_tag -------- Resource\n");
done = 1;
break;
case ACPI_RSTYPE_MEM24:
dbg("Mem24 -------- Resource\n");
break;
case ACPI_RSTYPE_MEM32:
dbg("Mem32 -------- Resource\n");
break;
case ACPI_RSTYPE_FIXED_MEM32:
dbg("Fixed Mem32 -------- Resource\n");
break;
case ACPI_RSTYPE_ADDRESS16:
acpi_parse_address16_32(ab, &resource->data, ACPI_RSTYPE_ADDRESS16);
break;
case ACPI_RSTYPE_ADDRESS32:
acpi_parse_address16_32(ab, &resource->data, ACPI_RSTYPE_ADDRESS32);
break;
case ACPI_RSTYPE_ADDRESS64:
info("Address64 -------- Resource unparsed\n");
break;
case ACPI_RSTYPE_EXT_IRQ:
dbg("Ext Irq -------- Resource\n");
break;
default:
dbg("Invalid -------- resource type 0x%x\n", resource->id);
break;
}
resource = (struct acpi_resource *) ((char *)resource + resource->length);
}
return status;
}
static acpi_status acpi_get_crs( struct acpi_bridge *ab)
{
acpi_status status;
struct acpi_resource *crsbuf;
status = acpi_evaluate_crs(ab->handle, &crsbuf);
if (ACPI_SUCCESS(status)) {
status = acpi_parse_crs(ab, crsbuf);
kfree(crsbuf);
pciehp_resource_sort_and_combine(&ab->bus_head);
pciehp_resource_sort_and_combine(&ab->io_head);
pciehp_resource_sort_and_combine(&ab->mem_head);
pciehp_resource_sort_and_combine(&ab->p_mem_head);
pciehprm_add_resources (&ab->tbus_head, ab->bus_head);
pciehprm_add_resources (&ab->tio_head, ab->io_head);
pciehprm_add_resources (&ab->tmem_head, ab->mem_head);
pciehprm_add_resources (&ab->tp_mem_head, ab->p_mem_head);
}
return status;
}
/* find acpi_bridge downword from ab. */
static struct acpi_bridge *
find_acpi_bridge_by_bus(
struct acpi_bridge *ab,
int seg,
int bus /* pdev->subordinate->number */
)
{
struct acpi_bridge *lab = NULL;
if (!ab)
return NULL;
if ((ab->bus == bus) && (ab->seg == seg))
return ab;
if (ab->child)
lab = find_acpi_bridge_by_bus(ab->child, seg, bus);
if (!lab)
if (ab->next)
lab = find_acpi_bridge_by_bus(ab->next, seg, bus);
return lab;
}
/*
* Build a device tree of ACPI PCI Bridges
*/
static void pciehprm_acpi_register_a_bridge (
struct acpi_bridge **head,
struct acpi_bridge *pab, /* parent bridge to which child bridge is added */
struct acpi_bridge *cab /* child bridge to add */
)
{
struct acpi_bridge *lpab;
struct acpi_bridge *lcab;
lpab = find_acpi_bridge_by_bus(*head, pab->seg, pab->bus);
if (!lpab) {
if (!(pab->type & BRIDGE_TYPE_HOST))
warn("PCI parent bridge s:b(%x:%x) not in list.\n", pab->seg, pab->bus);
pab->next = *head;
*head = pab;
lpab = pab;
}
if ((cab->type & BRIDGE_TYPE_HOST) && (pab == cab))
return;
lcab = find_acpi_bridge_by_bus(*head, cab->seg, cab->bus);
if (lcab) {
if ((pab->bus != lcab->parent->bus) || (lcab->bus != cab->bus))
err("PCI child bridge s:b(%x:%x) in list with diff parent.\n", cab->seg, cab->bus);
return;
} else
lcab = cab;
lcab->parent = lpab;
lcab->next = lpab->child;
lpab->child = lcab;
}
static acpi_status pciehprm_acpi_build_php_slots_callback(
acpi_handle handle,
u32 Level,
void *context,
void **retval
)
{
ulong bus_num;
ulong seg_num;
ulong sun, adr;
ulong padr = 0;
acpi_handle phandle = NULL;
struct acpi_bridge *pab = (struct acpi_bridge *)context;
struct acpi_bridge *lab;
acpi_status status;
u8 *path_name = acpi_path_name(handle);
/* get _SUN */
status = acpi_evaluate_integer(handle, METHOD_NAME__SUN, NULL, &sun);
switch(status) {
case AE_NOT_FOUND:
return AE_OK;
default:
if (ACPI_FAILURE(status)) {
err("acpi_pciehprm:%s _SUN fail=0x%x\n", path_name, status);
return status;
}
}
/* get _ADR. _ADR must exist if _SUN exists */
status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &adr);
if (ACPI_FAILURE(status)) {
err("acpi_pciehprm:%s _ADR fail=0x%x\n", path_name, status);
return status;
}
dbg("acpi_pciehprm:%s sun=0x%08x adr=0x%08x\n", path_name, (u32)sun, (u32)adr);
status = acpi_get_parent(handle, &phandle);
if (ACPI_FAILURE(status)) {
err("acpi_pciehprm:%s get_parent fail=0x%x\n", path_name, status);
return (status);
}
bus_num = pab->bus;
seg_num = pab->seg;
if (pab->bus == bus_num) {
lab = pab;
} else {
dbg("WARN: pab is not parent\n");
lab = find_acpi_bridge_by_bus(pab, seg_num, bus_num);
if (!lab) {
dbg("acpi_pciehprm: alloc new P2P bridge(%x) for sun(%08x)\n", (u32)bus_num, (u32)sun);
lab = (struct acpi_bridge *)kmalloc(sizeof(struct acpi_bridge), GFP_KERNEL);
if (!lab) {
err("acpi_pciehprm: alloc for ab fail\n");
return AE_NO_MEMORY;
}
memset(lab, 0, sizeof(struct acpi_bridge));
lab->handle = phandle;
lab->pbus = pab->bus;
lab->pdevice = (int)(padr >> 16) & 0xffff;
lab->pfunction = (int)(padr & 0xffff);
lab->bus = (int)bus_num;
lab->scanned = 0;
lab->type = BRIDGE_TYPE_P2P;
pciehprm_acpi_register_a_bridge (&acpi_bridges_head, pab, lab);
} else
dbg("acpi_pciehprm: found P2P bridge(%x) for sun(%08x)\n", (u32)bus_num, (u32)sun);
}
acpi_add_slot_to_php_slots(lab, (int)bus_num, handle, (u32)adr, (u32)sun);
return (status);
}
static int pciehprm_acpi_build_php_slots(
struct acpi_bridge *ab,
u32 depth
)
{
acpi_status status;
u8 *path_name = acpi_path_name(ab->handle);
/* Walk down this pci bridge to get _SUNs if any behind P2P */
status = acpi_walk_namespace ( ACPI_TYPE_DEVICE,
ab->handle,
depth,
pciehprm_acpi_build_php_slots_callback,
ab,
NULL );
if (ACPI_FAILURE(status)) {
dbg("acpi_pciehprm:%s walk for _SUN on pci bridge seg:bus(%x:%x) fail=0x%x\n", path_name, ab->seg, ab->bus, status);
return -1;
}
return 0;
}
static void build_a_bridge(
struct acpi_bridge *pab,
struct acpi_bridge *ab
)
{
u8 *path_name = acpi_path_name(ab->handle);
pciehprm_acpi_register_a_bridge (&acpi_bridges_head, pab, ab);
switch (ab->type) {
case BRIDGE_TYPE_HOST:
dbg("acpi_pciehprm: Registered PCI HOST Bridge(%02x) on s:b:d:f(%02x:%02x:%02x:%02x) [%s]\n",
ab->bus, ab->seg, ab->pbus, ab->pdevice, ab->pfunction, path_name);
break;
case BRIDGE_TYPE_P2P:
dbg("acpi_pciehprm: Registered PCI P2P Bridge(%02x-%02x) on s:b:d:f(%02x:%02x:%02x:%02x) [%s]\n",
ab->pbus, ab->bus, ab->seg, ab->pbus, ab->pdevice, ab->pfunction, path_name);
break;
};
/* build any immediate PHP slots under this pci bridge */
pciehprm_acpi_build_php_slots(ab, 1);
}
static struct acpi_bridge * add_p2p_bridge(
acpi_handle handle,
struct acpi_bridge *pab, /* parent */
ulong adr
)
{
struct acpi_bridge *ab;
struct pci_dev *pdev;
ulong devnum, funcnum;
u8 *path_name = acpi_path_name(handle);
ab = (struct acpi_bridge *) kmalloc (sizeof(struct acpi_bridge), GFP_KERNEL);
if (!ab) {
err("acpi_pciehprm: alloc for ab fail\n");
return NULL;
}
memset(ab, 0, sizeof(struct acpi_bridge));
devnum = (adr >> 16) & 0xffff;
funcnum = adr & 0xffff;
pdev = pci_find_slot(pab->bus, PCI_DEVFN(devnum, funcnum));
if (!pdev || !pdev->subordinate) {
err("acpi_pciehprm:%s is not a P2P Bridge\n", path_name);
kfree(ab);
return NULL;
}
ab->handle = handle;
ab->seg = pab->seg;
ab->pbus = pab->bus; /* or pdev->bus->number */
ab->pdevice = devnum; /* or PCI_SLOT(pdev->devfn) */
ab->pfunction = funcnum; /* or PCI_FUNC(pdev->devfn) */
ab->bus = pdev->subordinate->number;
ab->scanned = 0;
ab->type = BRIDGE_TYPE_P2P;
dbg("acpi_pciehprm: P2P(%x-%x) on pci=b:d:f(%x:%x:%x) acpi=b:d:f(%x:%x:%x) [%s]\n",
pab->bus, ab->bus, pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn),
pab->bus, (u32)devnum, (u32)funcnum, path_name);
build_a_bridge(pab, ab);
return ab;
}
static acpi_status scan_p2p_bridge(
acpi_handle handle,
u32 Level,
void *context,
void **retval
)
{
struct acpi_bridge *pab = (struct acpi_bridge *)context;
struct acpi_bridge *ab;
acpi_status status;
ulong adr = 0;
u8 *path_name = acpi_path_name(handle);
ulong devnum, funcnum;
struct pci_dev *pdev;
/* get device, function */
status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &adr);
if (ACPI_FAILURE(status)) {
if (status != AE_NOT_FOUND)
err("acpi_pciehprm:%s _ADR fail=0x%x\n", path_name, status);
return AE_OK;
}
devnum = (adr >> 16) & 0xffff;
funcnum = adr & 0xffff;
pdev = pci_find_slot(pab->bus, PCI_DEVFN(devnum, funcnum));
if (!pdev)
return AE_OK;
if (!pdev->subordinate)
return AE_OK;
ab = add_p2p_bridge(handle, pab, adr);
if (ab) {
status = acpi_walk_namespace ( ACPI_TYPE_DEVICE,
handle,
(u32)1,
scan_p2p_bridge,
ab,
NULL);
if (ACPI_FAILURE(status))
dbg("acpi_pciehprm:%s find_p2p fail=0x%x\n", path_name, status);
}
return AE_OK;
}
static struct acpi_bridge * add_host_bridge(
acpi_handle handle,
ulong segnum,
ulong busnum
)
{
ulong adr = 0;
acpi_status status;
struct acpi_bridge *ab;
u8 *path_name = acpi_path_name(handle);
/* get device, function: host br adr is always 0000 though. */
status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &adr);
if (ACPI_FAILURE(status)) {
err("acpi_pciehprm:%s _ADR fail=0x%x\n", path_name, status);
return NULL;
}
dbg("acpi_pciehprm: ROOT PCI seg(0x%x)bus(0x%x)dev(0x%x)func(0x%x) [%s]\n", (u32)segnum,
(u32)busnum, (u32)(adr >> 16) & 0xffff, (u32)adr & 0xffff, path_name);
ab = (struct acpi_bridge *) kmalloc (sizeof(struct acpi_bridge), GFP_KERNEL);
if (!ab) {
err("acpi_pciehprm: alloc for ab fail\n");
return NULL;
}
memset(ab, 0, sizeof(struct acpi_bridge));
ab->handle = handle;
ab->seg = (int)segnum;
ab->bus = ab->pbus = (int)busnum;
ab->pdevice = (int)(adr >> 16) & 0xffff;
ab->pfunction = (int)(adr & 0xffff);
ab->scanned = 0;
ab->type = BRIDGE_TYPE_HOST;
/* get root pci bridge's current resources */
status = acpi_get_crs(ab);
if (ACPI_FAILURE(status)) {
err("acpi_pciehprm:%s evaluate _CRS fail=0x%x\n", path_name, status);
kfree(ab);
return NULL;
}
status = pci_osc_control_set (OSC_PCI_EXPRESS_NATIVE_HP_CONTROL);
if (ACPI_FAILURE(status)) {
err("%s: status %x\n", __FUNCTION__, status);
osc_run_status = (status == AE_NOT_FOUND) ? OSC_NOT_EXIST : OSC_RUN_FAILED;
} else {
osc_run_status = NC_RUN_SUCCESS;
}
dbg("%s: osc_run_status %x\n", __FUNCTION__, osc_run_status);
build_a_bridge(ab, ab);
return ab;
}
static acpi_status acpi_scan_from_root_pci_callback (
acpi_handle handle,
u32 Level,
void *context,
void **retval
)
{
ulong segnum = 0;
ulong busnum = 0;
acpi_status status;
struct acpi_bridge *ab;
u8 *path_name = acpi_path_name(handle);
/* get bus number of this pci root bridge */
status = acpi_evaluate_integer(handle, METHOD_NAME__SEG, NULL, &segnum);
if (ACPI_FAILURE(status)) {
if (status != AE_NOT_FOUND) {
err("acpi_pciehprm:%s evaluate _SEG fail=0x%x\n", path_name, status);
return status;
}
segnum = 0;
}
/* get bus number of this pci root bridge */
status = acpi_evaluate_integer(handle, METHOD_NAME__BBN, NULL, &busnum);
if (ACPI_FAILURE(status)) {
err("acpi_pciehprm:%s evaluate _BBN fail=0x%x\n", path_name, status);
return (status);
}
ab = add_host_bridge(handle, segnum, busnum);
if (ab) {
status = acpi_walk_namespace ( ACPI_TYPE_DEVICE,
handle,
1,
scan_p2p_bridge,
ab,
NULL);
if (ACPI_FAILURE(status))
dbg("acpi_pciehprm:%s find_p2p fail=0x%x\n", path_name, status);
}
return AE_OK;
}
static int pciehprm_acpi_scan_pci (void)
{
acpi_status status;
/*
* TBD: traverse LDM device tree with the help of
* unified ACPI augmented for php device population.
*/
status = acpi_get_devices ( PCI_ROOT_HID_STRING,
acpi_scan_from_root_pci_callback,
NULL,
NULL );
if (ACPI_FAILURE(status)) {
err("acpi_pciehprm:get_device PCI ROOT HID fail=0x%x\n", status);
return -1;
}
return 0;
}
int pciehprm_init(enum php_ctlr_type ctlr_type)
{
int rc;
if (ctlr_type != PCI)
return -ENODEV;
dbg("pciehprm ACPI init <enter>\n");
acpi_bridges_head = NULL;
/* construct PCI bus:device tree of acpi_handles */
rc = pciehprm_acpi_scan_pci();
if (rc)
return rc;
if ((oshp_run_status != NC_RUN_SUCCESS) && (osc_run_status != NC_RUN_SUCCESS)) {
err("Fails to gain control of native hot-plug\n");
rc = -ENODEV;
}
dbg("pciehprm ACPI init %s\n", (rc)?"fail":"success");
return rc;
}
static void free_a_slot(struct acpi_php_slot *aps)
{
dbg(" free a php func of slot(0x%02x) on PCI b:d:f=0x%02x:%02x:%02x\n", aps->sun, aps->bus, aps->dev, aps->fun);
free_pci_resource (aps->io_head);
free_pci_resource (aps->bus_head);
free_pci_resource (aps->mem_head);
free_pci_resource (aps->p_mem_head);
kfree(aps);
}
static void free_a_bridge( struct acpi_bridge *ab)
{
struct acpi_php_slot *aps, *next;
switch (ab->type) {
case BRIDGE_TYPE_HOST:
dbg("Free ACPI PCI HOST Bridge(%x) [%s] on s:b:d:f(%x:%x:%x:%x)\n",
ab->bus, acpi_path_name(ab->handle), ab->seg, ab->pbus, ab->pdevice, ab->pfunction);
break;
case BRIDGE_TYPE_P2P:
dbg("Free ACPI PCI P2P Bridge(%x-%x) [%s] on s:b:d:f(%x:%x:%x:%x)\n",
ab->pbus, ab->bus, acpi_path_name(ab->handle), ab->seg, ab->pbus, ab->pdevice, ab->pfunction);
break;
};
/* free slots first */
for (aps = ab->slots; aps; aps = next) {
next = aps->next;
free_a_slot(aps);
}
free_pci_resource (ab->io_head);
free_pci_resource (ab->tio_head);
free_pci_resource (ab->bus_head);
free_pci_resource (ab->tbus_head);
free_pci_resource (ab->mem_head);
free_pci_resource (ab->tmem_head);
free_pci_resource (ab->p_mem_head);
free_pci_resource (ab->tp_mem_head);
kfree(ab);
}
static void pciehprm_free_bridges ( struct acpi_bridge *ab)
{
if (!ab)
return;
if (ab->child)
pciehprm_free_bridges (ab->child);
if (ab->next)
pciehprm_free_bridges (ab->next);
free_a_bridge(ab);
}
void pciehprm_cleanup(void)
{
pciehprm_free_bridges (acpi_bridges_head);
}
static int get_number_of_slots (
struct acpi_bridge *ab,
int selfonly
)
{
struct acpi_php_slot *aps;
int prev_slot = -1;
int slot_num = 0;
for ( aps = ab->slots; aps; aps = aps->next)
if (aps->dev != prev_slot) {
prev_slot = aps->dev;
slot_num++;
}
if (ab->child)
slot_num += get_number_of_slots (ab->child, 0);
if (selfonly)
return slot_num;
if (ab->next)
slot_num += get_number_of_slots (ab->next, 0);
return slot_num;
}
static int print_acpi_resources (struct acpi_bridge *ab)
{
struct acpi_php_slot *aps;
int i;
switch (ab->type) {
case BRIDGE_TYPE_HOST:
dbg("PCI HOST Bridge (%x) [%s]\n", ab->bus, acpi_path_name(ab->handle));
break;
case BRIDGE_TYPE_P2P:
dbg("PCI P2P Bridge (%x-%x) [%s]\n", ab->pbus, ab->bus, acpi_path_name(ab->handle));
break;
};
print_pci_resources (ab);
for ( i = -1, aps = ab->slots; aps; aps = aps->next) {
if (aps->dev == i)
continue;
dbg(" Slot sun(%x) s:b:d:f(%02x:%02x:%02x:%02x)\n", aps->sun, aps->seg, aps->bus, aps->dev, aps->fun);
print_slot_resources(aps);
i = aps->dev;
}
if (ab->child)
print_acpi_resources (ab->child);
if (ab->next)
print_acpi_resources (ab->next);
return 0;
}
int pciehprm_print_pirt(void)
{
dbg("PCIEHPRM ACPI Slots\n");
if (acpi_bridges_head)
print_acpi_resources (acpi_bridges_head);
return 0;
}
static struct acpi_php_slot * get_acpi_slot (
struct acpi_bridge *ab,
u32 sun
)
{
struct acpi_php_slot *aps = NULL;
for ( aps = ab->slots; aps; aps = aps->next)
if (aps->sun == sun)
return aps;
if (!aps && ab->child) {
aps = (struct acpi_php_slot *)get_acpi_slot (ab->child, sun);
if (aps)
return aps;
}
if (!aps && ab->next) {
aps = (struct acpi_php_slot *)get_acpi_slot (ab->next, sun);
if (aps)
return aps;
}
return aps;
}
#if 0
void * pciehprm_get_slot(struct slot *slot)
{
struct acpi_bridge *ab = acpi_bridges_head;
struct acpi_php_slot *aps = get_acpi_slot (ab, slot->number);
aps->slot = slot;
dbg("Got acpi slot sun(%x): s:b:d:f(%x:%x:%x:%x)\n", aps->sun, aps->seg, aps->bus, aps->dev, aps->fun);
return (void *)aps;
}
#endif
static void pciehprm_dump_func_res( struct pci_func *fun)
{
struct pci_func *func = fun;
if (func->bus_head) {
dbg(": BUS Resources:\n");
print_pci_resource (func->bus_head);
}
if (func->io_head) {
dbg(": IO Resources:\n");
print_pci_resource (func->io_head);
}
if (func->mem_head) {
dbg(": MEM Resources:\n");
print_pci_resource (func->mem_head);
}
if (func->p_mem_head) {
dbg(": PMEM Resources:\n");
print_pci_resource (func->p_mem_head);
}
}
static void pciehprm_dump_ctrl_res( struct controller *ctlr)
{
struct controller *ctrl = ctlr;
if (ctrl->bus_head) {
dbg(": BUS Resources:\n");
print_pci_resource (ctrl->bus_head);
}
if (ctrl->io_head) {
dbg(": IO Resources:\n");
print_pci_resource (ctrl->io_head);
}
if (ctrl->mem_head) {
dbg(": MEM Resources:\n");
print_pci_resource (ctrl->mem_head);
}
if (ctrl->p_mem_head) {
dbg(": PMEM Resources:\n");
print_pci_resource (ctrl->p_mem_head);
}
}
static int pciehprm_get_used_resources (
struct controller *ctrl,
struct pci_func *func
)
{
return pciehp_save_used_resources (ctrl, func, !DISABLE_CARD);
}
static int configure_existing_function(
struct controller *ctrl,
struct pci_func *func
)
{
int rc;
/* see how much resources the func has used. */
rc = pciehprm_get_used_resources (ctrl, func);
if (!rc) {
/* subtract the resources used by the func from ctrl resources */
rc = pciehprm_delete_resources (&ctrl->bus_head, func->bus_head);
rc |= pciehprm_delete_resources (&ctrl->io_head, func->io_head);
rc |= pciehprm_delete_resources (&ctrl->mem_head, func->mem_head);
rc |= pciehprm_delete_resources (&ctrl->p_mem_head, func->p_mem_head);
if (rc)
warn("aCEF: cannot del used resources\n");
} else
err("aCEF: cannot get used resources\n");
return rc;
}
static int bind_pci_resources_to_slots ( struct controller *ctrl)
{
struct pci_func *func, new_func;
int busn = ctrl->slot_bus;
int devn, funn;
u32 vid;
for (devn = 0; devn < 32; devn++) {
for (funn = 0; funn < 8; funn++) {
/*
if (devn == ctrl->device && funn == ctrl->function)
continue;
*/
/* find out if this entry is for an occupied slot */
vid = 0xFFFFFFFF;
pci_bus_read_config_dword(ctrl->pci_dev->subordinate, PCI_DEVFN(devn, funn), PCI_VENDOR_ID, &vid);
if (vid != 0xFFFFFFFF) {
dbg("%s: vid = %x\n", __FUNCTION__, vid);
func = pciehp_slot_find(busn, devn, funn);
if (!func) {
memset(&new_func, 0, sizeof(struct pci_func));
new_func.bus = busn;
new_func.device = devn;
new_func.function = funn;
new_func.is_a_board = 1;
configure_existing_function(ctrl, &new_func);
pciehprm_dump_func_res(&new_func);
} else {
configure_existing_function(ctrl, func);
pciehprm_dump_func_res(func);
}
dbg("aCCF:existing PCI 0x%x Func ResourceDump\n", ctrl->bus);
}
}
}
return 0;
}
static int bind_pci_resources(
struct controller *ctrl,
struct acpi_bridge *ab
)
{
int status = 0;
if (ab->bus_head) {
dbg("bapr: BUS Resources add on PCI 0x%x\n", ab->bus);
status = pciehprm_add_resources (&ctrl->bus_head, ab->bus_head);
if (pciehprm_delete_resources (&ab->bus_head, ctrl->bus_head))
warn("bapr: cannot sub BUS Resource on PCI 0x%x\n", ab->bus);
if (status) {
err("bapr: BUS Resource add on PCI 0x%x: fail=0x%x\n", ab->bus, status);
return status;
}
} else
info("bapr: No BUS Resource on PCI 0x%x.\n", ab->bus);
if (ab->io_head) {
dbg("bapr: IO Resources add on PCI 0x%x\n", ab->bus);
status = pciehprm_add_resources (&ctrl->io_head, ab->io_head);
if (pciehprm_delete_resources (&ab->io_head, ctrl->io_head))
warn("bapr: cannot sub IO Resource on PCI 0x%x\n", ab->bus);
if (status) {
err("bapr: IO Resource add on PCI 0x%x: fail=0x%x\n", ab->bus, status);
return status;
}
} else
info("bapr: No IO Resource on PCI 0x%x.\n", ab->bus);
if (ab->mem_head) {
dbg("bapr: MEM Resources add on PCI 0x%x\n", ab->bus);
status = pciehprm_add_resources (&ctrl->mem_head, ab->mem_head);
if (pciehprm_delete_resources (&ab->mem_head, ctrl->mem_head))
warn("bapr: cannot sub MEM Resource on PCI 0x%x\n", ab->bus);
if (status) {
err("bapr: MEM Resource add on PCI 0x%x: fail=0x%x\n", ab->bus, status);
return status;
}
} else
info("bapr: No MEM Resource on PCI 0x%x.\n", ab->bus);
if (ab->p_mem_head) {
dbg("bapr: PMEM Resources add on PCI 0x%x\n", ab->bus);
status = pciehprm_add_resources (&ctrl->p_mem_head, ab->p_mem_head);
if (pciehprm_delete_resources (&ab->p_mem_head, ctrl->p_mem_head))
warn("bapr: cannot sub PMEM Resource on PCI 0x%x\n", ab->bus);
if (status) {
err("bapr: PMEM Resource add on PCI 0x%x: fail=0x%x\n", ab->bus, status);
return status;
}
} else
info("bapr: No PMEM Resource on PCI 0x%x.\n", ab->bus);
return status;
}
static int no_pci_resources( struct acpi_bridge *ab)
{
return !(ab->p_mem_head || ab->mem_head || ab->io_head || ab->bus_head);
}
static int find_pci_bridge_resources (
struct controller *ctrl,
struct acpi_bridge *ab
)
{
int rc = 0;
struct pci_func func;
memset(&func, 0, sizeof(struct pci_func));
func.bus = ab->pbus;
func.device = ab->pdevice;
func.function = ab->pfunction;
func.is_a_board = 1;
/* Get used resources for this PCI bridge */
rc = pciehp_save_used_resources (ctrl, &func, !DISABLE_CARD);
ab->io_head = func.io_head;
ab->mem_head = func.mem_head;
ab->p_mem_head = func.p_mem_head;
ab->bus_head = func.bus_head;
if (ab->bus_head)
pciehprm_delete_resource(&ab->bus_head, ctrl->pci_dev->subordinate->number, 1);
return rc;
}
static int get_pci_resources_from_bridge(
struct controller *ctrl,
struct acpi_bridge *ab
)
{
int rc = 0;
dbg("grfb: Get Resources for PCI 0x%x from actual PCI bridge 0x%x.\n", ctrl->bus, ab->bus);
rc = find_pci_bridge_resources (ctrl, ab);
pciehp_resource_sort_and_combine(&ab->bus_head);
pciehp_resource_sort_and_combine(&ab->io_head);
pciehp_resource_sort_and_combine(&ab->mem_head);
pciehp_resource_sort_and_combine(&ab->p_mem_head);
pciehprm_add_resources (&ab->tbus_head, ab->bus_head);
pciehprm_add_resources (&ab->tio_head, ab->io_head);
pciehprm_add_resources (&ab->tmem_head, ab->mem_head);
pciehprm_add_resources (&ab->tp_mem_head, ab->p_mem_head);
return rc;
}
static int get_pci_resources(
struct controller *ctrl,
struct acpi_bridge *ab
)
{
int rc = 0;
if (no_pci_resources(ab)) {
dbg("spbr:PCI 0x%x has no resources. Get parent resources.\n", ab->bus);
rc = get_pci_resources_from_bridge(ctrl, ab);
}
return rc;
}
/*
* Get resources for this ctrl.
* 1. get total resources from ACPI _CRS or bridge (this ctrl)
* 2. find used resources of existing adapters
* 3. subtract used resources from total resources
*/
int pciehprm_find_available_resources( struct controller *ctrl)
{
int rc = 0;
struct acpi_bridge *ab;
ab = find_acpi_bridge_by_bus(acpi_bridges_head, ctrl->seg, ctrl->pci_dev->subordinate->number);
if (!ab) {
err("pfar:cannot locate acpi bridge of PCI 0x%x.\n", ctrl->pci_dev->subordinate->number);
return -1;
}
if (no_pci_resources(ab)) {
rc = get_pci_resources(ctrl, ab);
if (rc) {
err("pfar:cannot get pci resources of PCI 0x%x.\n", ctrl->pci_dev->subordinate->number);
return -1;
}
}
rc = bind_pci_resources(ctrl, ab);
dbg("pfar:pre-Bind PCI 0x%x Ctrl Resource Dump\n", ctrl->pci_dev->subordinate->number);
pciehprm_dump_ctrl_res(ctrl);
bind_pci_resources_to_slots (ctrl);
dbg("pfar:post-Bind PCI 0x%x Ctrl Resource Dump\n", ctrl->pci_dev->subordinate->number);
pciehprm_dump_ctrl_res(ctrl);
return rc;
}
int pciehprm_set_hpp(
struct controller *ctrl,
struct pci_func *func,
u8 card_type
)
{
struct acpi_bridge *ab;
struct pci_bus lpci_bus, *pci_bus;
int rc = 0;
unsigned int devfn;
u8 cls= 0x08; /* default cache line size */
u8 lt = 0x40; /* default latency timer */
u8 ep = 0;
u8 es = 0;
memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
pci_bus = &lpci_bus;
pci_bus->number = func->bus;
devfn = PCI_DEVFN(func->device, func->function);
ab = find_acpi_bridge_by_bus(acpi_bridges_head, ctrl->seg, ctrl->bus);
if (ab) {
if (ab->_hpp) {
lt = (u8)ab->_hpp->latency_timer;
cls = (u8)ab->_hpp->cache_line_size;
ep = (u8)ab->_hpp->enable_perr;
es = (u8)ab->_hpp->enable_serr;
} else
dbg("_hpp: no _hpp for B/D/F=%#x/%#x/%#x. use default value\n", func->bus, func->device, func->function);
} else
dbg("_hpp: no acpi bridge for B/D/F = %#x/%#x/%#x. use default value\n", func->bus, func->device, func->function);
if (card_type == PCI_HEADER_TYPE_BRIDGE) {
/* set subordinate Latency Timer */
rc |= pci_bus_write_config_byte(pci_bus, devfn, PCI_SEC_LATENCY_TIMER, lt);
}
/* set base Latency Timer */
rc |= pci_bus_write_config_byte(pci_bus, devfn, PCI_LATENCY_TIMER, lt);
dbg(" set latency timer =0x%02x: %x\n", lt, rc);
rc |= pci_bus_write_config_byte(pci_bus, devfn, PCI_CACHE_LINE_SIZE, cls);
dbg(" set cache_line_size=0x%02x: %x\n", cls, rc);
return rc;
}
void pciehprm_enable_card(
struct controller *ctrl,
struct pci_func *func,
u8 card_type)
{
u16 command, cmd, bcommand, bcmd;
struct pci_bus lpci_bus, *pci_bus;
struct acpi_bridge *ab;
unsigned int devfn;
int rc;
memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
pci_bus = &lpci_bus;
pci_bus->number = func->bus;
devfn = PCI_DEVFN(func->device, func->function);
rc = pci_bus_read_config_word(pci_bus, devfn, PCI_COMMAND, &cmd);
if (card_type == PCI_HEADER_TYPE_BRIDGE) {
rc = pci_bus_read_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, &bcmd);
}
command = cmd | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE
| PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
bcommand = bcmd | PCI_BRIDGE_CTL_NO_ISA;
ab = find_acpi_bridge_by_bus(acpi_bridges_head, ctrl->seg, ctrl->bus);
if (ab) {
if (ab->_hpp) {
if (ab->_hpp->enable_perr) {
command |= PCI_COMMAND_PARITY;
bcommand |= PCI_BRIDGE_CTL_PARITY;
} else {
command &= ~PCI_COMMAND_PARITY;
bcommand &= ~PCI_BRIDGE_CTL_PARITY;
}
if (ab->_hpp->enable_serr) {
command |= PCI_COMMAND_SERR;
bcommand |= PCI_BRIDGE_CTL_SERR;
} else {
command &= ~PCI_COMMAND_SERR;
bcommand &= ~PCI_BRIDGE_CTL_SERR;
}
} else
dbg("no _hpp for B/D/F = %#x/%#x/%#x.\n", func->bus, func->device, func->function);
} else
dbg("no acpi bridge for B/D/F = %#x/%#x/%#x.\n", func->bus, func->device, func->function);
if (command != cmd) {
rc = pci_bus_write_config_word(pci_bus, devfn, PCI_COMMAND, command);
}
if ((card_type == PCI_HEADER_TYPE_BRIDGE) && (bcommand != bcmd)) {
rc = pci_bus_write_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, bcommand);
}
}
