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/*
* This code gets the card location of the hardware
* Copyright (C) 2001 <Allan H Trautman> <IBM Corp>
* Copyright (C) 2005 Stephen Rothwel, IBM Corp
*
* 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
*
* Change Activity:
* Created, Feb 2, 2001
* Ported to ppc64, August 20, 2001
* End Change Activity
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <asm/types.h>
#include <asm/resource.h>
#include <asm/abs_addr.h>
#include <asm/iseries/hv_types.h>
#include "pci.h"
#include "call_pci.h"
/*
* Size of Bus VPD data
*/
#define BUS_VPDSIZE 1024
/*
* Bus Vpd Tags
*/
#define VPD_END_OF_AREA 0x79
#define VPD_ID_STRING 0x82
#define VPD_VENDOR_AREA 0x84
/*
* Mfg Area Tags
*/
#define VPD_FRU_FRAME_ID 0x4649 /* "FI" */
#define VPD_SLOT_MAP_FORMAT 0x4D46 /* "MF" */
#define VPD_SLOT_MAP 0x534D /* "SM" */
/*
* Structures of the areas
*/
struct mfg_vpd_area {
u16 tag;
u8 length;
u8 data1;
u8 data2;
};
#define MFG_ENTRY_SIZE 3
struct slot_map {
u8 agent;
u8 secondary_agent;
u8 phb;
char card_location[3];
char parms[8];
char reserved[2];
};
#define SLOT_ENTRY_SIZE 16
/*
* Parse the Slot Area
*/
static void __init iseries_parse_slot_area(struct slot_map *map, int len,
HvAgentId agent, u8 *phb, char card[4])
{
int slot_map_len = len;
struct slot_map *slot_map = map;
/*
* Parse Slot label until we find the one requested
*/
while (slot_map_len > 0) {
if (slot_map->agent == agent) {
/*
* If Phb wasn't found, grab the entry first one found.
*/
if (*phb == 0xff)
*phb = slot_map->phb;
/* Found it, extract the data. */
if (slot_map->phb == *phb) {
memcpy(card, &slot_map->card_location, 3);
card[3] = 0;
break;
}
}
/* Point to the next Slot */
slot_map = (struct slot_map *)((char *)slot_map + SLOT_ENTRY_SIZE);
slot_map_len -= SLOT_ENTRY_SIZE;
}
}
/*
* Parse the Mfg Area
*/
static void __init iseries_parse_mfg_area(u8 *area, int len,
HvAgentId agent, u8 *phb,
u8 *frame, char card[4])
{
struct mfg_vpd_area *mfg_area = (struct mfg_vpd_area *)area;
int mfg_area_len = len;
u16 slot_map_fmt = 0;
/* Parse Mfg Data */
while (mfg_area_len > 0) {
int mfg_tag_len = mfg_area->length;
/* Frame ID (FI 4649020310 ) */
if (mfg_area->tag == VPD_FRU_FRAME_ID)
*frame = mfg_area->data1;
/* Slot Map Format (MF 4D46020004 ) */
else if (mfg_area->tag == VPD_SLOT_MAP_FORMAT)
slot_map_fmt = (mfg_area->data1 * 256)
+ mfg_area->data2;
/* Slot Map (SM 534D90 */
else if (mfg_area->tag == VPD_SLOT_MAP) {
struct slot_map *slot_map;
if (slot_map_fmt == 0x1004)
slot_map = (struct slot_map *)((char *)mfg_area
+ MFG_ENTRY_SIZE + 1);
else
slot_map = (struct slot_map *)((char *)mfg_area
+ MFG_ENTRY_SIZE);
iseries_parse_slot_area(slot_map, mfg_tag_len,
agent, phb, card);
}
/*
* Point to the next Mfg Area
* Use defined size, sizeof give wrong answer
*/
mfg_area = (struct mfg_vpd_area *)((char *)mfg_area + mfg_tag_len
+ MFG_ENTRY_SIZE);
mfg_area_len -= (mfg_tag_len + MFG_ENTRY_SIZE);
}
}
/*
* Look for "BUS".. Data is not Null terminated.
* PHBID of 0xFF indicates PHB was not found in VPD Data.
*/
static int __init iseries_parse_phbid(u8 *area, int len)
{
u8 *phb_ptr = area;
int data_len = len;
char phb = 0xFF;
while (data_len > 0) {
if ((*phb_ptr == 'B') && (*(phb_ptr + 1) == 'U')
&& (*(phb_ptr + 2) == 'S')) {
phb_ptr += 3;
while (*phb_ptr == ' ')
++phb_ptr;
phb = (*phb_ptr & 0x0F);
break;
}
++phb_ptr;
--data_len;
}
return phb;
}
/*
* Parse out the VPD Areas
*/
static void __init iseries_parse_vpd(u8 *data, int vpd_data_len,
HvAgentId agent, u8 *frame, char card[4])
{
u8 *tag_ptr = data;
int data_len = vpd_data_len - 3;
u8 phb = 0xff;
while ((*tag_ptr != VPD_END_OF_AREA) && (data_len > 0)) {
int len = *(tag_ptr + 1) + (*(tag_ptr + 2) * 256);
u8 *area = tag_ptr + 3;
if (*tag_ptr == VPD_ID_STRING)
phb = iseries_parse_phbid(area, len);
else if (*tag_ptr == VPD_VENDOR_AREA)
iseries_parse_mfg_area(area, len,
agent, &phb, frame, card);
/* Point to next Area. */
tag_ptr = area + len;
data_len -= len;
}
}
static int __init iseries_get_location_code(u16 bus, HvAgentId agent,
u8 *frame, char card[4])
{
int status = 0;
int bus_vpd_len = 0;
u8 *bus_vpd = kmalloc(BUS_VPDSIZE, GFP_KERNEL);
if (bus_vpd == NULL) {
printk("PCI: Bus VPD Buffer allocation failure.\n");
return 0;
}
bus_vpd_len = HvCallPci_getBusVpd(bus, iseries_hv_addr(bus_vpd),
BUS_VPDSIZE);
if (bus_vpd_len == 0) {
printk("PCI: Bus VPD Buffer zero length.\n");
goto out_free;
}
/* printk("PCI: bus_vpd: %p, %d\n",bus_vpd, bus_vpd_len); */
/* Make sure this is what I think it is */
if (*bus_vpd != VPD_ID_STRING) {
printk("PCI: Bus VPD Buffer missing starting tag.\n");
goto out_free;
}
iseries_parse_vpd(bus_vpd, bus_vpd_len, agent, frame, card);
status = 1;
out_free:
kfree(bus_vpd);
return status;
}
/*
* Prints the device information.
* - Pass in pci_dev* pointer to the device.
* - Pass in the device count
*
* Format:
* PCI: Bus 0, Device 26, Vendor 0x12AE Frame 1, Card C10 Ethernet
* controller
*/
void __init iseries_device_information(struct pci_dev *pdev, int count,
u16 bus, HvSubBusNumber subbus)
{
u8 frame = 0;
char card[4];
HvAgentId agent;
agent = ISERIES_PCI_AGENTID(ISERIES_GET_DEVICE_FROM_SUBBUS(subbus),
ISERIES_GET_FUNCTION_FROM_SUBBUS(subbus));
if (iseries_get_location_code(bus, agent, &frame, card)) {
printk("%d. PCI: Bus%3d, Device%3d, Vendor %04X Frame%3d, "
"Card %4s 0x%04X\n", count, bus,
PCI_SLOT(pdev->devfn), pdev->vendor, frame,
card, (int)(pdev->class >> 8));
}
}
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