346 lines
8.8 KiB
C
346 lines
8.8 KiB
C
/*
|
|
* Copyright (C) 2001 Dave Engebretsen, IBM Corporation
|
|
* Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM
|
|
*
|
|
* pSeries specific routines for PCI.
|
|
*
|
|
* 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. 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/string.h>
|
|
|
|
#include <asm/eeh.h>
|
|
#include <asm/pci-bridge.h>
|
|
#include <asm/prom.h>
|
|
#include <asm/ppc-pci.h>
|
|
#include "pseries.h"
|
|
|
|
#if 0
|
|
void pcibios_name_device(struct pci_dev *dev)
|
|
{
|
|
struct device_node *dn;
|
|
|
|
/*
|
|
* Add IBM loc code (slot) as a prefix to the device names for service
|
|
*/
|
|
dn = pci_device_to_OF_node(dev);
|
|
if (dn) {
|
|
const char *loc_code = of_get_property(dn, "ibm,loc-code",
|
|
NULL);
|
|
if (loc_code) {
|
|
int loc_len = strlen(loc_code);
|
|
if (loc_len < sizeof(dev->dev.name)) {
|
|
memmove(dev->dev.name+loc_len+1, dev->dev.name,
|
|
sizeof(dev->dev.name)-loc_len-1);
|
|
memcpy(dev->dev.name, loc_code, loc_len);
|
|
dev->dev.name[loc_len] = ' ';
|
|
dev->dev.name[sizeof(dev->dev.name)-1] = '\0';
|
|
}
|
|
}
|
|
}
|
|
}
|
|
DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pcibios_name_device);
|
|
#endif
|
|
|
|
#ifdef CONFIG_PCI_IOV
|
|
#define MAX_VFS_FOR_MAP_PE 256
|
|
struct pe_map_bar_entry {
|
|
__be64 bar; /* Input: Virtual Function BAR */
|
|
__be16 rid; /* Input: Virtual Function Router ID */
|
|
__be16 pe_num; /* Output: Virtual Function PE Number */
|
|
__be32 reserved; /* Reserved Space */
|
|
};
|
|
|
|
int pseries_send_map_pe(struct pci_dev *pdev,
|
|
u16 num_vfs,
|
|
struct pe_map_bar_entry *vf_pe_array)
|
|
{
|
|
struct pci_dn *pdn;
|
|
int rc;
|
|
unsigned long buid, addr;
|
|
int ibm_map_pes = rtas_token("ibm,open-sriov-map-pe-number");
|
|
|
|
if (ibm_map_pes == RTAS_UNKNOWN_SERVICE)
|
|
return -EINVAL;
|
|
|
|
pdn = pci_get_pdn(pdev);
|
|
addr = rtas_config_addr(pdn->busno, pdn->devfn, 0);
|
|
buid = pdn->phb->buid;
|
|
spin_lock(&rtas_data_buf_lock);
|
|
memcpy(rtas_data_buf, vf_pe_array,
|
|
RTAS_DATA_BUF_SIZE);
|
|
rc = rtas_call(ibm_map_pes, 5, 1, NULL, addr,
|
|
BUID_HI(buid), BUID_LO(buid),
|
|
rtas_data_buf,
|
|
num_vfs * sizeof(struct pe_map_bar_entry));
|
|
memcpy(vf_pe_array, rtas_data_buf, RTAS_DATA_BUF_SIZE);
|
|
spin_unlock(&rtas_data_buf_lock);
|
|
|
|
if (rc)
|
|
dev_err(&pdev->dev,
|
|
"%s: Failed to associate pes PE#%lx, rc=%x\n",
|
|
__func__, addr, rc);
|
|
|
|
return rc;
|
|
}
|
|
|
|
void pseries_set_pe_num(struct pci_dev *pdev, u16 vf_index, __be16 pe_num)
|
|
{
|
|
struct pci_dn *pdn;
|
|
|
|
pdn = pci_get_pdn(pdev);
|
|
pdn->pe_num_map[vf_index] = be16_to_cpu(pe_num);
|
|
dev_dbg(&pdev->dev, "VF %04x:%02x:%02x.%x associated with PE#%x\n",
|
|
pci_domain_nr(pdev->bus),
|
|
pdev->bus->number,
|
|
PCI_SLOT(pci_iov_virtfn_devfn(pdev, vf_index)),
|
|
PCI_FUNC(pci_iov_virtfn_devfn(pdev, vf_index)),
|
|
pdn->pe_num_map[vf_index]);
|
|
}
|
|
|
|
int pseries_associate_pes(struct pci_dev *pdev, u16 num_vfs)
|
|
{
|
|
struct pci_dn *pdn;
|
|
int i, rc, vf_index;
|
|
struct pe_map_bar_entry *vf_pe_array;
|
|
struct resource *res;
|
|
u64 size;
|
|
|
|
vf_pe_array = kzalloc(RTAS_DATA_BUF_SIZE, GFP_KERNEL);
|
|
if (!vf_pe_array)
|
|
return -ENOMEM;
|
|
|
|
pdn = pci_get_pdn(pdev);
|
|
/* create firmware structure to associate pes */
|
|
for (vf_index = 0; vf_index < num_vfs; vf_index++) {
|
|
pdn->pe_num_map[vf_index] = IODA_INVALID_PE;
|
|
for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
|
|
res = &pdev->resource[i + PCI_IOV_RESOURCES];
|
|
if (!res->parent)
|
|
continue;
|
|
size = pcibios_iov_resource_alignment(pdev, i +
|
|
PCI_IOV_RESOURCES);
|
|
vf_pe_array[vf_index].bar =
|
|
cpu_to_be64(res->start + size * vf_index);
|
|
vf_pe_array[vf_index].rid =
|
|
cpu_to_be16((pci_iov_virtfn_bus(pdev, vf_index)
|
|
<< 8) | pci_iov_virtfn_devfn(pdev,
|
|
vf_index));
|
|
vf_pe_array[vf_index].pe_num =
|
|
cpu_to_be16(IODA_INVALID_PE);
|
|
}
|
|
}
|
|
|
|
rc = pseries_send_map_pe(pdev, num_vfs, vf_pe_array);
|
|
/* Only zero is success */
|
|
if (!rc)
|
|
for (vf_index = 0; vf_index < num_vfs; vf_index++)
|
|
pseries_set_pe_num(pdev, vf_index,
|
|
vf_pe_array[vf_index].pe_num);
|
|
|
|
kfree(vf_pe_array);
|
|
return rc;
|
|
}
|
|
|
|
int pseries_pci_sriov_enable(struct pci_dev *pdev, u16 num_vfs)
|
|
{
|
|
struct pci_dn *pdn;
|
|
int rc;
|
|
const int *max_vfs;
|
|
int max_config_vfs;
|
|
struct device_node *dn = pci_device_to_OF_node(pdev);
|
|
|
|
max_vfs = of_get_property(dn, "ibm,number-of-configurable-vfs", NULL);
|
|
|
|
if (!max_vfs)
|
|
return -EINVAL;
|
|
|
|
/* First integer stores max config */
|
|
max_config_vfs = of_read_number(&max_vfs[0], 1);
|
|
if (max_config_vfs < num_vfs && num_vfs > MAX_VFS_FOR_MAP_PE) {
|
|
dev_err(&pdev->dev,
|
|
"Num VFs %x > %x Configurable VFs\n",
|
|
num_vfs, (num_vfs > MAX_VFS_FOR_MAP_PE) ?
|
|
MAX_VFS_FOR_MAP_PE : max_config_vfs);
|
|
return -EINVAL;
|
|
}
|
|
|
|
pdn = pci_get_pdn(pdev);
|
|
pdn->pe_num_map = kmalloc_array(num_vfs,
|
|
sizeof(*pdn->pe_num_map),
|
|
GFP_KERNEL);
|
|
if (!pdn->pe_num_map)
|
|
return -ENOMEM;
|
|
|
|
rc = pseries_associate_pes(pdev, num_vfs);
|
|
|
|
/* Anything other than zero is failure */
|
|
if (rc) {
|
|
dev_err(&pdev->dev, "Failure to enable sriov: %x\n", rc);
|
|
kfree(pdn->pe_num_map);
|
|
} else {
|
|
pci_vf_drivers_autoprobe(pdev, false);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
int pseries_pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs)
|
|
{
|
|
/* Allocate PCI data */
|
|
add_dev_pci_data(pdev);
|
|
return pseries_pci_sriov_enable(pdev, num_vfs);
|
|
}
|
|
|
|
int pseries_pcibios_sriov_disable(struct pci_dev *pdev)
|
|
{
|
|
struct pci_dn *pdn;
|
|
|
|
pdn = pci_get_pdn(pdev);
|
|
/* Releasing pe_num_map */
|
|
kfree(pdn->pe_num_map);
|
|
/* Release PCI data */
|
|
remove_dev_pci_data(pdev);
|
|
pci_vf_drivers_autoprobe(pdev, true);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static void __init pSeries_request_regions(void)
|
|
{
|
|
if (!isa_io_base)
|
|
return;
|
|
|
|
request_region(0x20,0x20,"pic1");
|
|
request_region(0xa0,0x20,"pic2");
|
|
request_region(0x00,0x20,"dma1");
|
|
request_region(0x40,0x20,"timer");
|
|
request_region(0x80,0x10,"dma page reg");
|
|
request_region(0xc0,0x20,"dma2");
|
|
}
|
|
|
|
void __init pSeries_final_fixup(void)
|
|
{
|
|
pSeries_request_regions();
|
|
|
|
eeh_addr_cache_build();
|
|
|
|
#ifdef CONFIG_PCI_IOV
|
|
ppc_md.pcibios_sriov_enable = pseries_pcibios_sriov_enable;
|
|
ppc_md.pcibios_sriov_disable = pseries_pcibios_sriov_disable;
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Assume the winbond 82c105 is the IDE controller on a
|
|
* p610/p615/p630. We should probably be more careful in case
|
|
* someone tries to plug in a similar adapter.
|
|
*/
|
|
static void fixup_winbond_82c105(struct pci_dev* dev)
|
|
{
|
|
int i;
|
|
unsigned int reg;
|
|
|
|
if (!machine_is(pseries))
|
|
return;
|
|
|
|
printk("Using INTC for W82c105 IDE controller.\n");
|
|
pci_read_config_dword(dev, 0x40, ®);
|
|
/* Enable LEGIRQ to use INTC instead of ISA interrupts */
|
|
pci_write_config_dword(dev, 0x40, reg | (1<<11));
|
|
|
|
for (i = 0; i < DEVICE_COUNT_RESOURCE; ++i) {
|
|
/* zap the 2nd function of the winbond chip */
|
|
if (dev->resource[i].flags & IORESOURCE_IO
|
|
&& dev->bus->number == 0 && dev->devfn == 0x81)
|
|
dev->resource[i].flags &= ~IORESOURCE_IO;
|
|
if (dev->resource[i].start == 0 && dev->resource[i].end) {
|
|
dev->resource[i].flags = 0;
|
|
dev->resource[i].end = 0;
|
|
}
|
|
}
|
|
}
|
|
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105,
|
|
fixup_winbond_82c105);
|
|
|
|
int pseries_root_bridge_prepare(struct pci_host_bridge *bridge)
|
|
{
|
|
struct device_node *dn, *pdn;
|
|
struct pci_bus *bus;
|
|
u32 pcie_link_speed_stats[2];
|
|
int rc;
|
|
|
|
bus = bridge->bus;
|
|
|
|
/* Rely on the pcibios_free_controller_deferred() callback. */
|
|
pci_set_host_bridge_release(bridge, pcibios_free_controller_deferred,
|
|
(void *) pci_bus_to_host(bus));
|
|
|
|
dn = pcibios_get_phb_of_node(bus);
|
|
if (!dn)
|
|
return 0;
|
|
|
|
for (pdn = dn; pdn != NULL; pdn = of_get_next_parent(pdn)) {
|
|
rc = of_property_read_u32_array(pdn,
|
|
"ibm,pcie-link-speed-stats",
|
|
&pcie_link_speed_stats[0], 2);
|
|
if (!rc)
|
|
break;
|
|
}
|
|
|
|
of_node_put(pdn);
|
|
|
|
if (rc) {
|
|
pr_debug("no ibm,pcie-link-speed-stats property\n");
|
|
return 0;
|
|
}
|
|
|
|
switch (pcie_link_speed_stats[0]) {
|
|
case 0x01:
|
|
bus->max_bus_speed = PCIE_SPEED_2_5GT;
|
|
break;
|
|
case 0x02:
|
|
bus->max_bus_speed = PCIE_SPEED_5_0GT;
|
|
break;
|
|
case 0x04:
|
|
bus->max_bus_speed = PCIE_SPEED_8_0GT;
|
|
break;
|
|
default:
|
|
bus->max_bus_speed = PCI_SPEED_UNKNOWN;
|
|
break;
|
|
}
|
|
|
|
switch (pcie_link_speed_stats[1]) {
|
|
case 0x01:
|
|
bus->cur_bus_speed = PCIE_SPEED_2_5GT;
|
|
break;
|
|
case 0x02:
|
|
bus->cur_bus_speed = PCIE_SPEED_5_0GT;
|
|
break;
|
|
case 0x04:
|
|
bus->cur_bus_speed = PCIE_SPEED_8_0GT;
|
|
break;
|
|
default:
|
|
bus->cur_bus_speed = PCI_SPEED_UNKNOWN;
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|