79e50e7298
The following Coccinelle semantic patch was used to find and correct cases of assignments in "if" conditions: @@ expression var, expr; statement S; @@ + var = expr; if( - (var = expr) + var ) S Signed-off-by: Quentin Lambert <lambert.quentin@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
1722 lines
56 KiB
C
1722 lines
56 KiB
C
/*
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* IBM Hot Plug Controller Driver
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*
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* Written By: Irene Zubarev, IBM Corporation
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*
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* Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
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* Copyright (C) 2001,2002 IBM Corp.
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Send feedback to <gregkh@us.ibm.com>
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*
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/pci.h>
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#include <linux/list.h>
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#include "ibmphp.h"
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static int configure_device(struct pci_func *);
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static int configure_bridge(struct pci_func **, u8);
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static struct res_needed *scan_behind_bridge(struct pci_func *, u8);
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static int add_new_bus (struct bus_node *, struct resource_node *, struct resource_node *, struct resource_node *, u8);
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static u8 find_sec_number (u8 primary_busno, u8 slotno);
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/*
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* NOTE..... If BIOS doesn't provide default routing, we assign:
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* 9 for SCSI, 10 for LAN adapters, and 11 for everything else.
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* If adapter is bridged, then we assign 11 to it and devices behind it.
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* We also assign the same irq numbers for multi function devices.
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* These are PIC mode, so shouldn't matter n.e.ways (hopefully)
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*/
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static void assign_alt_irq (struct pci_func *cur_func, u8 class_code)
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{
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int j;
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for (j = 0; j < 4; j++) {
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if (cur_func->irq[j] == 0xff) {
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switch (class_code) {
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case PCI_BASE_CLASS_STORAGE:
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cur_func->irq[j] = SCSI_IRQ;
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break;
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case PCI_BASE_CLASS_NETWORK:
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cur_func->irq[j] = LAN_IRQ;
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break;
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default:
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cur_func->irq[j] = OTHER_IRQ;
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break;
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}
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}
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}
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}
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/*
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* Configures the device to be added (will allocate needed resources if it
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* can), the device can be a bridge or a regular pci device, can also be
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* multi-functional
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*
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* Input: function to be added
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*
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* TO DO: The error case with Multifunction device or multi function bridge,
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* if there is an error, will need to go through all previous functions and
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* unconfigure....or can add some code into unconfigure_card....
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*/
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int ibmphp_configure_card (struct pci_func *func, u8 slotno)
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{
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u16 vendor_id;
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u32 class;
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u8 class_code;
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u8 hdr_type, device, sec_number;
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u8 function;
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struct pci_func *newfunc; /* for multi devices */
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struct pci_func *cur_func, *prev_func;
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int rc, i, j;
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int cleanup_count;
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u8 flag;
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u8 valid_device = 0x00; /* to see if we are able to read from card any device info at all */
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debug ("inside configure_card, func->busno = %x\n", func->busno);
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device = func->device;
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cur_func = func;
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/* We only get bus and device from IRQ routing table. So at this point,
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* func->busno is correct, and func->device contains only device (at the 5
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* highest bits)
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*/
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/* For every function on the card */
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for (function = 0x00; function < 0x08; function++) {
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unsigned int devfn = PCI_DEVFN(device, function);
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ibmphp_pci_bus->number = cur_func->busno;
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cur_func->function = function;
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debug ("inside the loop, cur_func->busno = %x, cur_func->device = %x, cur_func->function = %x\n",
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cur_func->busno, cur_func->device, cur_func->function);
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pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_VENDOR_ID, &vendor_id);
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debug ("vendor_id is %x\n", vendor_id);
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if (vendor_id != PCI_VENDOR_ID_NOTVALID) {
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/* found correct device!!! */
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debug ("found valid device, vendor_id = %x\n", vendor_id);
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++valid_device;
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/* header: x x x x x x x x
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* | |___________|=> 1=PPB bridge, 0=normal device, 2=CardBus Bridge
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* |_=> 0 = single function device, 1 = multi-function device
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*/
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pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_HEADER_TYPE, &hdr_type);
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pci_bus_read_config_dword (ibmphp_pci_bus, devfn, PCI_CLASS_REVISION, &class);
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class_code = class >> 24;
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debug ("hrd_type = %x, class = %x, class_code %x\n", hdr_type, class, class_code);
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class >>= 8; /* to take revision out, class = class.subclass.prog i/f */
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if (class == PCI_CLASS_NOT_DEFINED_VGA) {
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err ("The device %x is VGA compatible and as is not supported for hot plugging. "
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"Please choose another device.\n", cur_func->device);
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return -ENODEV;
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} else if (class == PCI_CLASS_DISPLAY_VGA) {
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err ("The device %x is not supported for hot plugging. Please choose another device.\n",
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cur_func->device);
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return -ENODEV;
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}
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switch (hdr_type) {
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case PCI_HEADER_TYPE_NORMAL:
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debug ("single device case.... vendor id = %x, hdr_type = %x, class = %x\n", vendor_id, hdr_type, class);
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assign_alt_irq (cur_func, class_code);
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rc = configure_device(cur_func);
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if (rc < 0) {
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/* We need to do this in case some other BARs were properly inserted */
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err ("was not able to configure devfunc %x on bus %x.\n",
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cur_func->device, cur_func->busno);
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cleanup_count = 6;
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goto error;
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}
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cur_func->next = NULL;
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function = 0x8;
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break;
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case PCI_HEADER_TYPE_MULTIDEVICE:
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assign_alt_irq (cur_func, class_code);
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rc = configure_device(cur_func);
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if (rc < 0) {
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/* We need to do this in case some other BARs were properly inserted */
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err ("was not able to configure devfunc %x on bus %x...bailing out\n",
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cur_func->device, cur_func->busno);
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cleanup_count = 6;
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goto error;
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}
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newfunc = kzalloc(sizeof(*newfunc), GFP_KERNEL);
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if (!newfunc) {
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err ("out of system memory\n");
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return -ENOMEM;
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}
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newfunc->busno = cur_func->busno;
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newfunc->device = device;
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cur_func->next = newfunc;
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cur_func = newfunc;
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for (j = 0; j < 4; j++)
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newfunc->irq[j] = cur_func->irq[j];
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break;
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case PCI_HEADER_TYPE_MULTIBRIDGE:
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class >>= 8;
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if (class != PCI_CLASS_BRIDGE_PCI) {
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err ("This %x is not PCI-to-PCI bridge, and as is not supported for hot-plugging. Please insert another card.\n",
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cur_func->device);
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return -ENODEV;
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}
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assign_alt_irq (cur_func, class_code);
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rc = configure_bridge (&cur_func, slotno);
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if (rc == -ENODEV) {
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err ("You chose to insert Single Bridge, or nested bridges, this is not supported...\n");
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err ("Bus %x, devfunc %x\n", cur_func->busno, cur_func->device);
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return rc;
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}
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if (rc) {
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/* We need to do this in case some other BARs were properly inserted */
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err ("was not able to hot-add PPB properly.\n");
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func->bus = 1; /* To indicate to the unconfigure function that this is a PPB */
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cleanup_count = 2;
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goto error;
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}
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pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_SECONDARY_BUS, &sec_number);
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flag = 0;
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for (i = 0; i < 32; i++) {
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if (func->devices[i]) {
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newfunc = kzalloc(sizeof(*newfunc), GFP_KERNEL);
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if (!newfunc) {
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err ("out of system memory\n");
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return -ENOMEM;
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}
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newfunc->busno = sec_number;
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newfunc->device = (u8) i;
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for (j = 0; j < 4; j++)
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newfunc->irq[j] = cur_func->irq[j];
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if (flag) {
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for (prev_func = cur_func; prev_func->next; prev_func = prev_func->next) ;
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prev_func->next = newfunc;
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} else
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cur_func->next = newfunc;
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rc = ibmphp_configure_card (newfunc, slotno);
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/* This could only happen if kmalloc failed */
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if (rc) {
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/* We need to do this in case bridge itself got configured properly, but devices behind it failed */
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func->bus = 1; /* To indicate to the unconfigure function that this is a PPB */
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cleanup_count = 2;
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goto error;
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}
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flag = 1;
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}
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}
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newfunc = kzalloc(sizeof(*newfunc), GFP_KERNEL);
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if (!newfunc) {
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err ("out of system memory\n");
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return -ENOMEM;
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}
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newfunc->busno = cur_func->busno;
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newfunc->device = device;
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for (j = 0; j < 4; j++)
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newfunc->irq[j] = cur_func->irq[j];
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for (prev_func = cur_func; prev_func->next; prev_func = prev_func->next) ;
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prev_func->next = newfunc;
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cur_func = newfunc;
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break;
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case PCI_HEADER_TYPE_BRIDGE:
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class >>= 8;
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debug ("class now is %x\n", class);
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if (class != PCI_CLASS_BRIDGE_PCI) {
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err ("This %x is not PCI-to-PCI bridge, and as is not supported for hot-plugging. Please insert another card.\n",
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cur_func->device);
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return -ENODEV;
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}
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assign_alt_irq (cur_func, class_code);
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debug ("cur_func->busno b4 configure_bridge is %x\n", cur_func->busno);
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rc = configure_bridge (&cur_func, slotno);
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if (rc == -ENODEV) {
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err ("You chose to insert Single Bridge, or nested bridges, this is not supported...\n");
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err ("Bus %x, devfunc %x\n", cur_func->busno, cur_func->device);
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return rc;
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}
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if (rc) {
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/* We need to do this in case some other BARs were properly inserted */
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func->bus = 1; /* To indicate to the unconfigure function that this is a PPB */
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err ("was not able to hot-add PPB properly.\n");
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cleanup_count = 2;
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goto error;
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}
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debug ("cur_func->busno = %x, device = %x, function = %x\n",
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cur_func->busno, device, function);
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pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_SECONDARY_BUS, &sec_number);
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debug ("after configuring bridge..., sec_number = %x\n", sec_number);
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flag = 0;
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for (i = 0; i < 32; i++) {
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if (func->devices[i]) {
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debug ("inside for loop, device is %x\n", i);
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newfunc = kzalloc(sizeof(*newfunc), GFP_KERNEL);
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if (!newfunc) {
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err (" out of system memory\n");
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return -ENOMEM;
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}
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newfunc->busno = sec_number;
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newfunc->device = (u8) i;
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for (j = 0; j < 4; j++)
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newfunc->irq[j] = cur_func->irq[j];
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if (flag) {
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for (prev_func = cur_func; prev_func->next; prev_func = prev_func->next) ;
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prev_func->next = newfunc;
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} else
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cur_func->next = newfunc;
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rc = ibmphp_configure_card (newfunc, slotno);
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/* Again, this case should not happen... For complete paranoia, will need to call remove_bus */
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if (rc) {
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/* We need to do this in case some other BARs were properly inserted */
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func->bus = 1; /* To indicate to the unconfigure function that this is a PPB */
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cleanup_count = 2;
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goto error;
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}
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flag = 1;
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}
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}
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function = 0x8;
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break;
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default:
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err ("MAJOR PROBLEM!!!!, header type not supported? %x\n", hdr_type);
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return -ENXIO;
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break;
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} /* end of switch */
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} /* end of valid device */
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} /* end of for */
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if (!valid_device) {
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err ("Cannot find any valid devices on the card. Or unable to read from card.\n");
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return -ENODEV;
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}
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return 0;
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error:
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for (i = 0; i < cleanup_count; i++) {
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if (cur_func->io[i]) {
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ibmphp_remove_resource (cur_func->io[i]);
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cur_func->io[i] = NULL;
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} else if (cur_func->pfmem[i]) {
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ibmphp_remove_resource (cur_func->pfmem[i]);
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cur_func->pfmem[i] = NULL;
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} else if (cur_func->mem[i]) {
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ibmphp_remove_resource (cur_func->mem[i]);
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cur_func->mem[i] = NULL;
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}
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}
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return rc;
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}
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/*
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* This function configures the pci BARs of a single device.
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* Input: pointer to the pci_func
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* Output: configured PCI, 0, or error
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*/
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static int configure_device (struct pci_func *func)
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{
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u32 bar[6];
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u32 address[] = {
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PCI_BASE_ADDRESS_0,
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PCI_BASE_ADDRESS_1,
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PCI_BASE_ADDRESS_2,
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PCI_BASE_ADDRESS_3,
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PCI_BASE_ADDRESS_4,
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PCI_BASE_ADDRESS_5,
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0
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};
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u8 irq;
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int count;
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int len[6];
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struct resource_node *io[6];
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struct resource_node *mem[6];
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struct resource_node *mem_tmp;
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struct resource_node *pfmem[6];
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unsigned int devfn;
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debug ("%s - inside\n", __func__);
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devfn = PCI_DEVFN(func->device, func->function);
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ibmphp_pci_bus->number = func->busno;
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for (count = 0; address[count]; count++) { /* for 6 BARs */
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/* not sure if i need this. per scott, said maybe need * something like this
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if devices don't adhere 100% to the spec, so don't want to write
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to the reserved bits
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pcibios_read_config_byte(cur_func->busno, cur_func->device,
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PCI_BASE_ADDRESS_0 + 4 * count, &tmp);
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if (tmp & 0x01) // IO
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pcibios_write_config_dword(cur_func->busno, cur_func->device,
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PCI_BASE_ADDRESS_0 + 4 * count, 0xFFFFFFFD);
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else // Memory
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pcibios_write_config_dword(cur_func->busno, cur_func->device,
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PCI_BASE_ADDRESS_0 + 4 * count, 0xFFFFFFFF);
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*/
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pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0xFFFFFFFF);
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pci_bus_read_config_dword (ibmphp_pci_bus, devfn, address[count], &bar[count]);
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if (!bar[count]) /* This BAR is not implemented */
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continue;
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debug ("Device %x BAR %d wants %x\n", func->device, count, bar[count]);
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if (bar[count] & PCI_BASE_ADDRESS_SPACE_IO) {
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/* This is IO */
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debug ("inside IO SPACE\n");
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len[count] = bar[count] & 0xFFFFFFFC;
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len[count] = ~len[count] + 1;
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debug ("len[count] in IO %x, count %d\n", len[count], count);
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io[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
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if (!io[count]) {
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err ("out of system memory\n");
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return -ENOMEM;
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}
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io[count]->type = IO;
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io[count]->busno = func->busno;
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io[count]->devfunc = PCI_DEVFN(func->device, func->function);
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io[count]->len = len[count];
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if (ibmphp_check_resource(io[count], 0) == 0) {
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ibmphp_add_resource (io[count]);
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func->io[count] = io[count];
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} else {
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err ("cannot allocate requested io for bus %x device %x function %x len %x\n",
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func->busno, func->device, func->function, len[count]);
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kfree (io[count]);
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return -EIO;
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}
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pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], func->io[count]->start);
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|
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/* _______________This is for debugging purposes only_____________________ */
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debug ("b4 writing, the IO address is %x\n", func->io[count]->start);
|
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pci_bus_read_config_dword (ibmphp_pci_bus, devfn, address[count], &bar[count]);
|
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debug ("after writing.... the start address is %x\n", bar[count]);
|
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/* _________________________________________________________________________*/
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|
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} else {
|
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/* This is Memory */
|
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if (bar[count] & PCI_BASE_ADDRESS_MEM_PREFETCH) {
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/* pfmem */
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debug ("PFMEM SPACE\n");
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len[count] = bar[count] & 0xFFFFFFF0;
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len[count] = ~len[count] + 1;
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debug ("len[count] in PFMEM %x, count %d\n", len[count], count);
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pfmem[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
|
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if (!pfmem[count]) {
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err ("out of system memory\n");
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return -ENOMEM;
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}
|
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pfmem[count]->type = PFMEM;
|
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pfmem[count]->busno = func->busno;
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pfmem[count]->devfunc = PCI_DEVFN(func->device,
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func->function);
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pfmem[count]->len = len[count];
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pfmem[count]->fromMem = 0;
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if (ibmphp_check_resource (pfmem[count], 0) == 0) {
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ibmphp_add_resource (pfmem[count]);
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func->pfmem[count] = pfmem[count];
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} else {
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mem_tmp = kzalloc(sizeof(*mem_tmp), GFP_KERNEL);
|
|
if (!mem_tmp) {
|
|
err ("out of system memory\n");
|
|
kfree (pfmem[count]);
|
|
return -ENOMEM;
|
|
}
|
|
mem_tmp->type = MEM;
|
|
mem_tmp->busno = pfmem[count]->busno;
|
|
mem_tmp->devfunc = pfmem[count]->devfunc;
|
|
mem_tmp->len = pfmem[count]->len;
|
|
debug ("there's no pfmem... going into mem.\n");
|
|
if (ibmphp_check_resource (mem_tmp, 0) == 0) {
|
|
ibmphp_add_resource (mem_tmp);
|
|
pfmem[count]->fromMem = 1;
|
|
pfmem[count]->rangeno = mem_tmp->rangeno;
|
|
pfmem[count]->start = mem_tmp->start;
|
|
pfmem[count]->end = mem_tmp->end;
|
|
ibmphp_add_pfmem_from_mem (pfmem[count]);
|
|
func->pfmem[count] = pfmem[count];
|
|
} else {
|
|
err ("cannot allocate requested pfmem for bus %x, device %x, len %x\n",
|
|
func->busno, func->device, len[count]);
|
|
kfree (mem_tmp);
|
|
kfree (pfmem[count]);
|
|
return -EIO;
|
|
}
|
|
}
|
|
|
|
pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], func->pfmem[count]->start);
|
|
|
|
/*_______________This is for debugging purposes only______________________________*/
|
|
debug ("b4 writing, start address is %x\n", func->pfmem[count]->start);
|
|
pci_bus_read_config_dword (ibmphp_pci_bus, devfn, address[count], &bar[count]);
|
|
debug ("after writing, start address is %x\n", bar[count]);
|
|
/*_________________________________________________________________________________*/
|
|
|
|
if (bar[count] & PCI_BASE_ADDRESS_MEM_TYPE_64) { /* takes up another dword */
|
|
debug ("inside the mem 64 case, count %d\n", count);
|
|
count += 1;
|
|
/* on the 2nd dword, write all 0s, since we can't handle them n.e.ways */
|
|
pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0x00000000);
|
|
}
|
|
} else {
|
|
/* regular memory */
|
|
debug ("REGULAR MEM SPACE\n");
|
|
|
|
len[count] = bar[count] & 0xFFFFFFF0;
|
|
len[count] = ~len[count] + 1;
|
|
|
|
debug ("len[count] in Mem %x, count %d\n", len[count], count);
|
|
|
|
mem[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
|
|
if (!mem[count]) {
|
|
err ("out of system memory\n");
|
|
return -ENOMEM;
|
|
}
|
|
mem[count]->type = MEM;
|
|
mem[count]->busno = func->busno;
|
|
mem[count]->devfunc = PCI_DEVFN(func->device,
|
|
func->function);
|
|
mem[count]->len = len[count];
|
|
if (ibmphp_check_resource (mem[count], 0) == 0) {
|
|
ibmphp_add_resource (mem[count]);
|
|
func->mem[count] = mem[count];
|
|
} else {
|
|
err ("cannot allocate requested mem for bus %x, device %x, len %x\n",
|
|
func->busno, func->device, len[count]);
|
|
kfree (mem[count]);
|
|
return -EIO;
|
|
}
|
|
pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], func->mem[count]->start);
|
|
/* _______________________This is for debugging purposes only _______________________*/
|
|
debug ("b4 writing, start address is %x\n", func->mem[count]->start);
|
|
pci_bus_read_config_dword (ibmphp_pci_bus, devfn, address[count], &bar[count]);
|
|
debug ("after writing, the address is %x\n", bar[count]);
|
|
/* __________________________________________________________________________________*/
|
|
|
|
if (bar[count] & PCI_BASE_ADDRESS_MEM_TYPE_64) {
|
|
/* takes up another dword */
|
|
debug ("inside mem 64 case, reg. mem, count %d\n", count);
|
|
count += 1;
|
|
/* on the 2nd dword, write all 0s, since we can't handle them n.e.ways */
|
|
pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0x00000000);
|
|
}
|
|
}
|
|
} /* end of mem */
|
|
} /* end of for */
|
|
|
|
func->bus = 0; /* To indicate that this is not a PPB */
|
|
pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_INTERRUPT_PIN, &irq);
|
|
if ((irq > 0x00) && (irq < 0x05))
|
|
pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_INTERRUPT_LINE, func->irq[irq - 1]);
|
|
|
|
pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_CACHE_LINE_SIZE, CACHE);
|
|
pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_LATENCY_TIMER, LATENCY);
|
|
|
|
pci_bus_write_config_dword (ibmphp_pci_bus, devfn, PCI_ROM_ADDRESS, 0x00L);
|
|
pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_COMMAND, DEVICEENABLE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* This routine configures a PCI-2-PCI bridge and the functions behind it
|
|
* Parameters: pci_func
|
|
* Returns:
|
|
******************************************************************************/
|
|
static int configure_bridge (struct pci_func **func_passed, u8 slotno)
|
|
{
|
|
int count;
|
|
int i;
|
|
int rc;
|
|
u8 sec_number;
|
|
u8 io_base;
|
|
u16 pfmem_base;
|
|
u32 bar[2];
|
|
u32 len[2];
|
|
u8 flag_io = 0;
|
|
u8 flag_mem = 0;
|
|
u8 flag_pfmem = 0;
|
|
u8 need_io_upper = 0;
|
|
u8 need_pfmem_upper = 0;
|
|
struct res_needed *amount_needed = NULL;
|
|
struct resource_node *io = NULL;
|
|
struct resource_node *bus_io[2] = {NULL, NULL};
|
|
struct resource_node *mem = NULL;
|
|
struct resource_node *bus_mem[2] = {NULL, NULL};
|
|
struct resource_node *mem_tmp = NULL;
|
|
struct resource_node *pfmem = NULL;
|
|
struct resource_node *bus_pfmem[2] = {NULL, NULL};
|
|
struct bus_node *bus;
|
|
u32 address[] = {
|
|
PCI_BASE_ADDRESS_0,
|
|
PCI_BASE_ADDRESS_1,
|
|
0
|
|
};
|
|
struct pci_func *func = *func_passed;
|
|
unsigned int devfn;
|
|
u8 irq;
|
|
int retval;
|
|
|
|
debug ("%s - enter\n", __func__);
|
|
|
|
devfn = PCI_DEVFN(func->function, func->device);
|
|
ibmphp_pci_bus->number = func->busno;
|
|
|
|
/* Configuring necessary info for the bridge so that we could see the devices
|
|
* behind it
|
|
*/
|
|
|
|
pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_PRIMARY_BUS, func->busno);
|
|
|
|
/* _____________________For debugging purposes only __________________________
|
|
pci_bus_config_byte (ibmphp_pci_bus, devfn, PCI_PRIMARY_BUS, &pri_number);
|
|
debug ("primary # written into the bridge is %x\n", pri_number);
|
|
___________________________________________________________________________*/
|
|
|
|
/* in EBDA, only get allocated 1 additional bus # per slot */
|
|
sec_number = find_sec_number (func->busno, slotno);
|
|
if (sec_number == 0xff) {
|
|
err ("cannot allocate secondary bus number for the bridged device\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
debug ("after find_sec_number, the number we got is %x\n", sec_number);
|
|
debug ("AFTER FIND_SEC_NUMBER, func->busno IS %x\n", func->busno);
|
|
|
|
pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_SECONDARY_BUS, sec_number);
|
|
|
|
/* __________________For debugging purposes only __________________________________
|
|
pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_SECONDARY_BUS, &sec_number);
|
|
debug ("sec_number after write/read is %x\n", sec_number);
|
|
________________________________________________________________________________*/
|
|
|
|
pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_SUBORDINATE_BUS, sec_number);
|
|
|
|
/* __________________For debugging purposes only ____________________________________
|
|
pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_SUBORDINATE_BUS, &sec_number);
|
|
debug ("subordinate number after write/read is %x\n", sec_number);
|
|
__________________________________________________________________________________*/
|
|
|
|
pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_CACHE_LINE_SIZE, CACHE);
|
|
pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_LATENCY_TIMER, LATENCY);
|
|
pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_SEC_LATENCY_TIMER, LATENCY);
|
|
|
|
debug ("func->busno is %x\n", func->busno);
|
|
debug ("sec_number after writing is %x\n", sec_number);
|
|
|
|
|
|
/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
|
|
!!!!!!!!!!!!!!!NEED TO ADD!!! FAST BACK-TO-BACK ENABLE!!!!!!!!!!!!!!!!!!!!
|
|
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!*/
|
|
|
|
|
|
/* First we need to allocate mem/io for the bridge itself in case it needs it */
|
|
for (count = 0; address[count]; count++) { /* for 2 BARs */
|
|
pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0xFFFFFFFF);
|
|
pci_bus_read_config_dword (ibmphp_pci_bus, devfn, address[count], &bar[count]);
|
|
|
|
if (!bar[count]) {
|
|
/* This BAR is not implemented */
|
|
debug ("so we come here then, eh?, count = %d\n", count);
|
|
continue;
|
|
}
|
|
// tmp_bar = bar[count];
|
|
|
|
debug ("Bar %d wants %x\n", count, bar[count]);
|
|
|
|
if (bar[count] & PCI_BASE_ADDRESS_SPACE_IO) {
|
|
/* This is IO */
|
|
len[count] = bar[count] & 0xFFFFFFFC;
|
|
len[count] = ~len[count] + 1;
|
|
|
|
debug ("len[count] in IO = %x\n", len[count]);
|
|
|
|
bus_io[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
|
|
|
|
if (!bus_io[count]) {
|
|
err ("out of system memory\n");
|
|
retval = -ENOMEM;
|
|
goto error;
|
|
}
|
|
bus_io[count]->type = IO;
|
|
bus_io[count]->busno = func->busno;
|
|
bus_io[count]->devfunc = PCI_DEVFN(func->device,
|
|
func->function);
|
|
bus_io[count]->len = len[count];
|
|
if (ibmphp_check_resource (bus_io[count], 0) == 0) {
|
|
ibmphp_add_resource (bus_io[count]);
|
|
func->io[count] = bus_io[count];
|
|
} else {
|
|
err ("cannot allocate requested io for bus %x, device %x, len %x\n",
|
|
func->busno, func->device, len[count]);
|
|
kfree (bus_io[count]);
|
|
return -EIO;
|
|
}
|
|
|
|
pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], func->io[count]->start);
|
|
|
|
} else {
|
|
/* This is Memory */
|
|
if (bar[count] & PCI_BASE_ADDRESS_MEM_PREFETCH) {
|
|
/* pfmem */
|
|
len[count] = bar[count] & 0xFFFFFFF0;
|
|
len[count] = ~len[count] + 1;
|
|
|
|
debug ("len[count] in PFMEM = %x\n", len[count]);
|
|
|
|
bus_pfmem[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
|
|
if (!bus_pfmem[count]) {
|
|
err ("out of system memory\n");
|
|
retval = -ENOMEM;
|
|
goto error;
|
|
}
|
|
bus_pfmem[count]->type = PFMEM;
|
|
bus_pfmem[count]->busno = func->busno;
|
|
bus_pfmem[count]->devfunc = PCI_DEVFN(func->device,
|
|
func->function);
|
|
bus_pfmem[count]->len = len[count];
|
|
bus_pfmem[count]->fromMem = 0;
|
|
if (ibmphp_check_resource (bus_pfmem[count], 0) == 0) {
|
|
ibmphp_add_resource (bus_pfmem[count]);
|
|
func->pfmem[count] = bus_pfmem[count];
|
|
} else {
|
|
mem_tmp = kzalloc(sizeof(*mem_tmp), GFP_KERNEL);
|
|
if (!mem_tmp) {
|
|
err ("out of system memory\n");
|
|
retval = -ENOMEM;
|
|
goto error;
|
|
}
|
|
mem_tmp->type = MEM;
|
|
mem_tmp->busno = bus_pfmem[count]->busno;
|
|
mem_tmp->devfunc = bus_pfmem[count]->devfunc;
|
|
mem_tmp->len = bus_pfmem[count]->len;
|
|
if (ibmphp_check_resource (mem_tmp, 0) == 0) {
|
|
ibmphp_add_resource (mem_tmp);
|
|
bus_pfmem[count]->fromMem = 1;
|
|
bus_pfmem[count]->rangeno = mem_tmp->rangeno;
|
|
ibmphp_add_pfmem_from_mem (bus_pfmem[count]);
|
|
func->pfmem[count] = bus_pfmem[count];
|
|
} else {
|
|
err ("cannot allocate requested pfmem for bus %x, device %x, len %x\n",
|
|
func->busno, func->device, len[count]);
|
|
kfree (mem_tmp);
|
|
kfree (bus_pfmem[count]);
|
|
return -EIO;
|
|
}
|
|
}
|
|
|
|
pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], func->pfmem[count]->start);
|
|
|
|
if (bar[count] & PCI_BASE_ADDRESS_MEM_TYPE_64) {
|
|
/* takes up another dword */
|
|
count += 1;
|
|
/* on the 2nd dword, write all 0s, since we can't handle them n.e.ways */
|
|
pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0x00000000);
|
|
|
|
}
|
|
} else {
|
|
/* regular memory */
|
|
len[count] = bar[count] & 0xFFFFFFF0;
|
|
len[count] = ~len[count] + 1;
|
|
|
|
debug ("len[count] in Memory is %x\n", len[count]);
|
|
|
|
bus_mem[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
|
|
if (!bus_mem[count]) {
|
|
err ("out of system memory\n");
|
|
retval = -ENOMEM;
|
|
goto error;
|
|
}
|
|
bus_mem[count]->type = MEM;
|
|
bus_mem[count]->busno = func->busno;
|
|
bus_mem[count]->devfunc = PCI_DEVFN(func->device,
|
|
func->function);
|
|
bus_mem[count]->len = len[count];
|
|
if (ibmphp_check_resource (bus_mem[count], 0) == 0) {
|
|
ibmphp_add_resource (bus_mem[count]);
|
|
func->mem[count] = bus_mem[count];
|
|
} else {
|
|
err ("cannot allocate requested mem for bus %x, device %x, len %x\n",
|
|
func->busno, func->device, len[count]);
|
|
kfree (bus_mem[count]);
|
|
return -EIO;
|
|
}
|
|
|
|
pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], func->mem[count]->start);
|
|
|
|
if (bar[count] & PCI_BASE_ADDRESS_MEM_TYPE_64) {
|
|
/* takes up another dword */
|
|
count += 1;
|
|
/* on the 2nd dword, write all 0s, since we can't handle them n.e.ways */
|
|
pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0x00000000);
|
|
|
|
}
|
|
}
|
|
} /* end of mem */
|
|
} /* end of for */
|
|
|
|
/* Now need to see how much space the devices behind the bridge needed */
|
|
amount_needed = scan_behind_bridge (func, sec_number);
|
|
if (amount_needed == NULL)
|
|
return -ENOMEM;
|
|
|
|
ibmphp_pci_bus->number = func->busno;
|
|
debug ("after coming back from scan_behind_bridge\n");
|
|
debug ("amount_needed->not_correct = %x\n", amount_needed->not_correct);
|
|
debug ("amount_needed->io = %x\n", amount_needed->io);
|
|
debug ("amount_needed->mem = %x\n", amount_needed->mem);
|
|
debug ("amount_needed->pfmem = %x\n", amount_needed->pfmem);
|
|
|
|
if (amount_needed->not_correct) {
|
|
debug ("amount_needed is not correct\n");
|
|
for (count = 0; address[count]; count++) {
|
|
/* for 2 BARs */
|
|
if (bus_io[count]) {
|
|
ibmphp_remove_resource (bus_io[count]);
|
|
func->io[count] = NULL;
|
|
} else if (bus_pfmem[count]) {
|
|
ibmphp_remove_resource (bus_pfmem[count]);
|
|
func->pfmem[count] = NULL;
|
|
} else if (bus_mem[count]) {
|
|
ibmphp_remove_resource (bus_mem[count]);
|
|
func->mem[count] = NULL;
|
|
}
|
|
}
|
|
kfree (amount_needed);
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (!amount_needed->io) {
|
|
debug ("it doesn't want IO?\n");
|
|
flag_io = 1;
|
|
} else {
|
|
debug ("it wants %x IO behind the bridge\n", amount_needed->io);
|
|
io = kzalloc(sizeof(*io), GFP_KERNEL);
|
|
|
|
if (!io) {
|
|
err ("out of system memory\n");
|
|
retval = -ENOMEM;
|
|
goto error;
|
|
}
|
|
io->type = IO;
|
|
io->busno = func->busno;
|
|
io->devfunc = PCI_DEVFN(func->device, func->function);
|
|
io->len = amount_needed->io;
|
|
if (ibmphp_check_resource (io, 1) == 0) {
|
|
debug ("were we able to add io\n");
|
|
ibmphp_add_resource (io);
|
|
flag_io = 1;
|
|
}
|
|
}
|
|
|
|
if (!amount_needed->mem) {
|
|
debug ("it doesn't want n.e.memory?\n");
|
|
flag_mem = 1;
|
|
} else {
|
|
debug ("it wants %x memory behind the bridge\n", amount_needed->mem);
|
|
mem = kzalloc(sizeof(*mem), GFP_KERNEL);
|
|
if (!mem) {
|
|
err ("out of system memory\n");
|
|
retval = -ENOMEM;
|
|
goto error;
|
|
}
|
|
mem->type = MEM;
|
|
mem->busno = func->busno;
|
|
mem->devfunc = PCI_DEVFN(func->device, func->function);
|
|
mem->len = amount_needed->mem;
|
|
if (ibmphp_check_resource (mem, 1) == 0) {
|
|
ibmphp_add_resource (mem);
|
|
flag_mem = 1;
|
|
debug ("were we able to add mem\n");
|
|
}
|
|
}
|
|
|
|
if (!amount_needed->pfmem) {
|
|
debug ("it doesn't want n.e.pfmem mem?\n");
|
|
flag_pfmem = 1;
|
|
} else {
|
|
debug ("it wants %x pfmemory behind the bridge\n", amount_needed->pfmem);
|
|
pfmem = kzalloc(sizeof(*pfmem), GFP_KERNEL);
|
|
if (!pfmem) {
|
|
err ("out of system memory\n");
|
|
retval = -ENOMEM;
|
|
goto error;
|
|
}
|
|
pfmem->type = PFMEM;
|
|
pfmem->busno = func->busno;
|
|
pfmem->devfunc = PCI_DEVFN(func->device, func->function);
|
|
pfmem->len = amount_needed->pfmem;
|
|
pfmem->fromMem = 0;
|
|
if (ibmphp_check_resource (pfmem, 1) == 0) {
|
|
ibmphp_add_resource (pfmem);
|
|
flag_pfmem = 1;
|
|
} else {
|
|
mem_tmp = kzalloc(sizeof(*mem_tmp), GFP_KERNEL);
|
|
if (!mem_tmp) {
|
|
err ("out of system memory\n");
|
|
retval = -ENOMEM;
|
|
goto error;
|
|
}
|
|
mem_tmp->type = MEM;
|
|
mem_tmp->busno = pfmem->busno;
|
|
mem_tmp->devfunc = pfmem->devfunc;
|
|
mem_tmp->len = pfmem->len;
|
|
if (ibmphp_check_resource (mem_tmp, 1) == 0) {
|
|
ibmphp_add_resource (mem_tmp);
|
|
pfmem->fromMem = 1;
|
|
pfmem->rangeno = mem_tmp->rangeno;
|
|
ibmphp_add_pfmem_from_mem (pfmem);
|
|
flag_pfmem = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
debug ("b4 if (flag_io && flag_mem && flag_pfmem)\n");
|
|
debug ("flag_io = %x, flag_mem = %x, flag_pfmem = %x\n", flag_io, flag_mem, flag_pfmem);
|
|
|
|
if (flag_io && flag_mem && flag_pfmem) {
|
|
/* If on bootup, there was a bridged card in this slot,
|
|
* then card was removed and ibmphp got unloaded and loaded
|
|
* back again, there's no way for us to remove the bus
|
|
* struct, so no need to kmalloc, can use existing node
|
|
*/
|
|
bus = ibmphp_find_res_bus (sec_number);
|
|
if (!bus) {
|
|
bus = kzalloc(sizeof(*bus), GFP_KERNEL);
|
|
if (!bus) {
|
|
err ("out of system memory\n");
|
|
retval = -ENOMEM;
|
|
goto error;
|
|
}
|
|
bus->busno = sec_number;
|
|
debug ("b4 adding new bus\n");
|
|
rc = add_new_bus (bus, io, mem, pfmem, func->busno);
|
|
} else if (!(bus->rangeIO) && !(bus->rangeMem) && !(bus->rangePFMem))
|
|
rc = add_new_bus (bus, io, mem, pfmem, 0xFF);
|
|
else {
|
|
err ("expected bus structure not empty?\n");
|
|
retval = -EIO;
|
|
goto error;
|
|
}
|
|
if (rc) {
|
|
if (rc == -ENOMEM) {
|
|
ibmphp_remove_bus (bus, func->busno);
|
|
kfree (amount_needed);
|
|
return rc;
|
|
}
|
|
retval = rc;
|
|
goto error;
|
|
}
|
|
pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_IO_BASE, &io_base);
|
|
pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_PREF_MEMORY_BASE, &pfmem_base);
|
|
|
|
if ((io_base & PCI_IO_RANGE_TYPE_MASK) == PCI_IO_RANGE_TYPE_32) {
|
|
debug ("io 32\n");
|
|
need_io_upper = 1;
|
|
}
|
|
if ((pfmem_base & PCI_PREF_RANGE_TYPE_MASK) == PCI_PREF_RANGE_TYPE_64) {
|
|
debug ("pfmem 64\n");
|
|
need_pfmem_upper = 1;
|
|
}
|
|
|
|
if (bus->noIORanges) {
|
|
pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_IO_BASE, 0x00 | bus->rangeIO->start >> 8);
|
|
pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_IO_LIMIT, 0x00 | bus->rangeIO->end >> 8);
|
|
|
|
/* _______________This is for debugging purposes only ____________________
|
|
pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_IO_BASE, &temp);
|
|
debug ("io_base = %x\n", (temp & PCI_IO_RANGE_TYPE_MASK) << 8);
|
|
pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_IO_LIMIT, &temp);
|
|
debug ("io_limit = %x\n", (temp & PCI_IO_RANGE_TYPE_MASK) << 8);
|
|
________________________________________________________________________*/
|
|
|
|
if (need_io_upper) { /* since can't support n.e.ways */
|
|
pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_IO_BASE_UPPER16, 0x0000);
|
|
pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_IO_LIMIT_UPPER16, 0x0000);
|
|
}
|
|
} else {
|
|
pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_IO_BASE, 0x00);
|
|
pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_IO_LIMIT, 0x00);
|
|
}
|
|
|
|
if (bus->noMemRanges) {
|
|
pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_MEMORY_BASE, 0x0000 | bus->rangeMem->start >> 16);
|
|
pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_MEMORY_LIMIT, 0x0000 | bus->rangeMem->end >> 16);
|
|
|
|
/* ____________________This is for debugging purposes only ________________________
|
|
pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_MEMORY_BASE, &temp);
|
|
debug ("mem_base = %x\n", (temp & PCI_MEMORY_RANGE_TYPE_MASK) << 16);
|
|
pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_MEMORY_LIMIT, &temp);
|
|
debug ("mem_limit = %x\n", (temp & PCI_MEMORY_RANGE_TYPE_MASK) << 16);
|
|
__________________________________________________________________________________*/
|
|
|
|
} else {
|
|
pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_MEMORY_BASE, 0xffff);
|
|
pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_MEMORY_LIMIT, 0x0000);
|
|
}
|
|
if (bus->noPFMemRanges) {
|
|
pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_PREF_MEMORY_BASE, 0x0000 | bus->rangePFMem->start >> 16);
|
|
pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, 0x0000 | bus->rangePFMem->end >> 16);
|
|
|
|
/* __________________________This is for debugging purposes only _______________________
|
|
pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_PREF_MEMORY_BASE, &temp);
|
|
debug ("pfmem_base = %x", (temp & PCI_MEMORY_RANGE_TYPE_MASK) << 16);
|
|
pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, &temp);
|
|
debug ("pfmem_limit = %x\n", (temp & PCI_MEMORY_RANGE_TYPE_MASK) << 16);
|
|
______________________________________________________________________________________*/
|
|
|
|
if (need_pfmem_upper) { /* since can't support n.e.ways */
|
|
pci_bus_write_config_dword (ibmphp_pci_bus, devfn, PCI_PREF_BASE_UPPER32, 0x00000000);
|
|
pci_bus_write_config_dword (ibmphp_pci_bus, devfn, PCI_PREF_LIMIT_UPPER32, 0x00000000);
|
|
}
|
|
} else {
|
|
pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_PREF_MEMORY_BASE, 0xffff);
|
|
pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, 0x0000);
|
|
}
|
|
|
|
debug ("b4 writing control information\n");
|
|
|
|
pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_INTERRUPT_PIN, &irq);
|
|
if ((irq > 0x00) && (irq < 0x05))
|
|
pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_INTERRUPT_LINE, func->irq[irq - 1]);
|
|
/*
|
|
pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_BRIDGE_CONTROL, ctrl);
|
|
pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_BRIDGE_CONTROL, PCI_BRIDGE_CTL_PARITY);
|
|
pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_BRIDGE_CONTROL, PCI_BRIDGE_CTL_SERR);
|
|
*/
|
|
|
|
pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_COMMAND, DEVICEENABLE);
|
|
pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_BRIDGE_CONTROL, 0x07);
|
|
for (i = 0; i < 32; i++) {
|
|
if (amount_needed->devices[i]) {
|
|
debug ("device where devices[i] is 1 = %x\n", i);
|
|
func->devices[i] = 1;
|
|
}
|
|
}
|
|
func->bus = 1; /* For unconfiguring, to indicate it's PPB */
|
|
func_passed = &func;
|
|
debug ("func->busno b4 returning is %x\n", func->busno);
|
|
debug ("func->busno b4 returning in the other structure is %x\n", (*func_passed)->busno);
|
|
kfree (amount_needed);
|
|
return 0;
|
|
} else {
|
|
err ("Configuring bridge was unsuccessful...\n");
|
|
mem_tmp = NULL;
|
|
retval = -EIO;
|
|
goto error;
|
|
}
|
|
|
|
error:
|
|
kfree(amount_needed);
|
|
if (pfmem)
|
|
ibmphp_remove_resource (pfmem);
|
|
if (io)
|
|
ibmphp_remove_resource (io);
|
|
if (mem)
|
|
ibmphp_remove_resource (mem);
|
|
for (i = 0; i < 2; i++) { /* for 2 BARs */
|
|
if (bus_io[i]) {
|
|
ibmphp_remove_resource (bus_io[i]);
|
|
func->io[i] = NULL;
|
|
} else if (bus_pfmem[i]) {
|
|
ibmphp_remove_resource (bus_pfmem[i]);
|
|
func->pfmem[i] = NULL;
|
|
} else if (bus_mem[i]) {
|
|
ibmphp_remove_resource (bus_mem[i]);
|
|
func->mem[i] = NULL;
|
|
}
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* This function adds up the amount of resources needed behind the PPB bridge
|
|
* and passes it to the configure_bridge function
|
|
* Input: bridge function
|
|
* Output: amount of resources needed
|
|
*****************************************************************************/
|
|
static struct res_needed *scan_behind_bridge (struct pci_func *func, u8 busno)
|
|
{
|
|
int count, len[6];
|
|
u16 vendor_id;
|
|
u8 hdr_type;
|
|
u8 device, function;
|
|
unsigned int devfn;
|
|
int howmany = 0; /*this is to see if there are any devices behind the bridge */
|
|
|
|
u32 bar[6], class;
|
|
u32 address[] = {
|
|
PCI_BASE_ADDRESS_0,
|
|
PCI_BASE_ADDRESS_1,
|
|
PCI_BASE_ADDRESS_2,
|
|
PCI_BASE_ADDRESS_3,
|
|
PCI_BASE_ADDRESS_4,
|
|
PCI_BASE_ADDRESS_5,
|
|
0
|
|
};
|
|
struct res_needed *amount;
|
|
|
|
amount = kzalloc(sizeof(*amount), GFP_KERNEL);
|
|
if (amount == NULL)
|
|
return NULL;
|
|
|
|
ibmphp_pci_bus->number = busno;
|
|
|
|
debug ("the bus_no behind the bridge is %x\n", busno);
|
|
debug ("scanning devices behind the bridge...\n");
|
|
for (device = 0; device < 32; device++) {
|
|
amount->devices[device] = 0;
|
|
for (function = 0; function < 8; function++) {
|
|
devfn = PCI_DEVFN(device, function);
|
|
|
|
pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_VENDOR_ID, &vendor_id);
|
|
|
|
if (vendor_id != PCI_VENDOR_ID_NOTVALID) {
|
|
/* found correct device!!! */
|
|
howmany++;
|
|
|
|
pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_HEADER_TYPE, &hdr_type);
|
|
pci_bus_read_config_dword (ibmphp_pci_bus, devfn, PCI_CLASS_REVISION, &class);
|
|
|
|
debug ("hdr_type behind the bridge is %x\n", hdr_type);
|
|
if (hdr_type & PCI_HEADER_TYPE_BRIDGE) {
|
|
err ("embedded bridges not supported for hot-plugging.\n");
|
|
amount->not_correct = 1;
|
|
return amount;
|
|
}
|
|
|
|
class >>= 8; /* to take revision out, class = class.subclass.prog i/f */
|
|
if (class == PCI_CLASS_NOT_DEFINED_VGA) {
|
|
err ("The device %x is VGA compatible and as is not supported for hot plugging. Please choose another device.\n", device);
|
|
amount->not_correct = 1;
|
|
return amount;
|
|
} else if (class == PCI_CLASS_DISPLAY_VGA) {
|
|
err ("The device %x is not supported for hot plugging. Please choose another device.\n", device);
|
|
amount->not_correct = 1;
|
|
return amount;
|
|
}
|
|
|
|
amount->devices[device] = 1;
|
|
|
|
for (count = 0; address[count]; count++) {
|
|
/* for 6 BARs */
|
|
/*
|
|
pci_bus_read_config_byte (ibmphp_pci_bus, devfn, address[count], &tmp);
|
|
if (tmp & 0x01) // IO
|
|
pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0xFFFFFFFD);
|
|
else // MEMORY
|
|
pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0xFFFFFFFF);
|
|
*/
|
|
pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0xFFFFFFFF);
|
|
pci_bus_read_config_dword (ibmphp_pci_bus, devfn, address[count], &bar[count]);
|
|
|
|
debug ("what is bar[count]? %x, count = %d\n", bar[count], count);
|
|
|
|
if (!bar[count]) /* This BAR is not implemented */
|
|
continue;
|
|
|
|
//tmp_bar = bar[count];
|
|
|
|
debug ("count %d device %x function %x wants %x resources\n", count, device, function, bar[count]);
|
|
|
|
if (bar[count] & PCI_BASE_ADDRESS_SPACE_IO) {
|
|
/* This is IO */
|
|
len[count] = bar[count] & 0xFFFFFFFC;
|
|
len[count] = ~len[count] + 1;
|
|
amount->io += len[count];
|
|
} else {
|
|
/* This is Memory */
|
|
if (bar[count] & PCI_BASE_ADDRESS_MEM_PREFETCH) {
|
|
/* pfmem */
|
|
len[count] = bar[count] & 0xFFFFFFF0;
|
|
len[count] = ~len[count] + 1;
|
|
amount->pfmem += len[count];
|
|
if (bar[count] & PCI_BASE_ADDRESS_MEM_TYPE_64)
|
|
/* takes up another dword */
|
|
count += 1;
|
|
|
|
} else {
|
|
/* regular memory */
|
|
len[count] = bar[count] & 0xFFFFFFF0;
|
|
len[count] = ~len[count] + 1;
|
|
amount->mem += len[count];
|
|
if (bar[count] & PCI_BASE_ADDRESS_MEM_TYPE_64) {
|
|
/* takes up another dword */
|
|
count += 1;
|
|
}
|
|
}
|
|
}
|
|
} /* end for */
|
|
} /* end if (valid) */
|
|
} /* end for */
|
|
} /* end for */
|
|
|
|
if (!howmany)
|
|
amount->not_correct = 1;
|
|
else
|
|
amount->not_correct = 0;
|
|
if ((amount->io) && (amount->io < IOBRIDGE))
|
|
amount->io = IOBRIDGE;
|
|
if ((amount->mem) && (amount->mem < MEMBRIDGE))
|
|
amount->mem = MEMBRIDGE;
|
|
if ((amount->pfmem) && (amount->pfmem < MEMBRIDGE))
|
|
amount->pfmem = MEMBRIDGE;
|
|
return amount;
|
|
}
|
|
|
|
/* The following 3 unconfigure_boot_ routines deal with the case when we had the card
|
|
* upon bootup in the system, since we don't allocate func to such case, we need to read
|
|
* the start addresses from pci config space and then find the corresponding entries in
|
|
* our resource lists. The functions return either 0, -ENODEV, or -1 (general failure)
|
|
* Change: we also call these functions even if we configured the card ourselves (i.e., not
|
|
* the bootup case), since it should work same way
|
|
*/
|
|
static int unconfigure_boot_device (u8 busno, u8 device, u8 function)
|
|
{
|
|
u32 start_address;
|
|
u32 address[] = {
|
|
PCI_BASE_ADDRESS_0,
|
|
PCI_BASE_ADDRESS_1,
|
|
PCI_BASE_ADDRESS_2,
|
|
PCI_BASE_ADDRESS_3,
|
|
PCI_BASE_ADDRESS_4,
|
|
PCI_BASE_ADDRESS_5,
|
|
0
|
|
};
|
|
int count;
|
|
struct resource_node *io;
|
|
struct resource_node *mem;
|
|
struct resource_node *pfmem;
|
|
struct bus_node *bus;
|
|
u32 end_address;
|
|
u32 temp_end;
|
|
u32 size;
|
|
u32 tmp_address;
|
|
unsigned int devfn;
|
|
|
|
debug ("%s - enter\n", __func__);
|
|
|
|
bus = ibmphp_find_res_bus (busno);
|
|
if (!bus) {
|
|
debug ("cannot find corresponding bus.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
devfn = PCI_DEVFN(device, function);
|
|
ibmphp_pci_bus->number = busno;
|
|
for (count = 0; address[count]; count++) { /* for 6 BARs */
|
|
pci_bus_read_config_dword (ibmphp_pci_bus, devfn, address[count], &start_address);
|
|
|
|
/* We can do this here, b/c by that time the device driver of the card has been stopped */
|
|
|
|
pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0xFFFFFFFF);
|
|
pci_bus_read_config_dword (ibmphp_pci_bus, devfn, address[count], &size);
|
|
pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], start_address);
|
|
|
|
debug ("start_address is %x\n", start_address);
|
|
debug ("busno, device, function %x %x %x\n", busno, device, function);
|
|
if (!size) {
|
|
/* This BAR is not implemented */
|
|
debug ("is this bar no implemented?, count = %d\n", count);
|
|
continue;
|
|
}
|
|
tmp_address = start_address;
|
|
if (start_address & PCI_BASE_ADDRESS_SPACE_IO) {
|
|
/* This is IO */
|
|
start_address &= PCI_BASE_ADDRESS_IO_MASK;
|
|
size = size & 0xFFFFFFFC;
|
|
size = ~size + 1;
|
|
end_address = start_address + size - 1;
|
|
if (ibmphp_find_resource (bus, start_address, &io, IO) < 0) {
|
|
err ("cannot find corresponding IO resource to remove\n");
|
|
return -EIO;
|
|
}
|
|
debug ("io->start = %x\n", io->start);
|
|
temp_end = io->end;
|
|
start_address = io->end + 1;
|
|
ibmphp_remove_resource (io);
|
|
/* This is needed b/c of the old I/O restrictions in the BIOS */
|
|
while (temp_end < end_address) {
|
|
if (ibmphp_find_resource (bus, start_address, &io, IO) < 0) {
|
|
err ("cannot find corresponding IO resource to remove\n");
|
|
return -EIO;
|
|
}
|
|
debug ("io->start = %x\n", io->start);
|
|
temp_end = io->end;
|
|
start_address = io->end + 1;
|
|
ibmphp_remove_resource (io);
|
|
}
|
|
|
|
/* ????????? DO WE NEED TO WRITE ANYTHING INTO THE PCI CONFIG SPACE BACK ?????????? */
|
|
} else {
|
|
/* This is Memory */
|
|
if (start_address & PCI_BASE_ADDRESS_MEM_PREFETCH) {
|
|
/* pfmem */
|
|
debug ("start address of pfmem is %x\n", start_address);
|
|
start_address &= PCI_BASE_ADDRESS_MEM_MASK;
|
|
|
|
if (ibmphp_find_resource (bus, start_address, &pfmem, PFMEM) < 0) {
|
|
err ("cannot find corresponding PFMEM resource to remove\n");
|
|
return -EIO;
|
|
}
|
|
if (pfmem) {
|
|
debug ("pfmem->start = %x\n", pfmem->start);
|
|
|
|
ibmphp_remove_resource(pfmem);
|
|
}
|
|
} else {
|
|
/* regular memory */
|
|
debug ("start address of mem is %x\n", start_address);
|
|
start_address &= PCI_BASE_ADDRESS_MEM_MASK;
|
|
|
|
if (ibmphp_find_resource (bus, start_address, &mem, MEM) < 0) {
|
|
err ("cannot find corresponding MEM resource to remove\n");
|
|
return -EIO;
|
|
}
|
|
if (mem) {
|
|
debug ("mem->start = %x\n", mem->start);
|
|
|
|
ibmphp_remove_resource(mem);
|
|
}
|
|
}
|
|
if (tmp_address & PCI_BASE_ADDRESS_MEM_TYPE_64) {
|
|
/* takes up another dword */
|
|
count += 1;
|
|
}
|
|
} /* end of mem */
|
|
} /* end of for */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int unconfigure_boot_bridge (u8 busno, u8 device, u8 function)
|
|
{
|
|
int count;
|
|
int bus_no, pri_no, sub_no, sec_no = 0;
|
|
u32 start_address, tmp_address;
|
|
u8 sec_number, sub_number, pri_number;
|
|
struct resource_node *io = NULL;
|
|
struct resource_node *mem = NULL;
|
|
struct resource_node *pfmem = NULL;
|
|
struct bus_node *bus;
|
|
u32 address[] = {
|
|
PCI_BASE_ADDRESS_0,
|
|
PCI_BASE_ADDRESS_1,
|
|
0
|
|
};
|
|
unsigned int devfn;
|
|
|
|
devfn = PCI_DEVFN(device, function);
|
|
ibmphp_pci_bus->number = busno;
|
|
bus_no = (int) busno;
|
|
debug ("busno is %x\n", busno);
|
|
pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_PRIMARY_BUS, &pri_number);
|
|
debug ("%s - busno = %x, primary_number = %x\n", __func__, busno, pri_number);
|
|
|
|
pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_SECONDARY_BUS, &sec_number);
|
|
debug ("sec_number is %x\n", sec_number);
|
|
sec_no = (int) sec_number;
|
|
pri_no = (int) pri_number;
|
|
if (pri_no != bus_no) {
|
|
err ("primary numbers in our structures and pci config space don't match.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_SUBORDINATE_BUS, &sub_number);
|
|
sub_no = (int) sub_number;
|
|
debug ("sub_no is %d, sec_no is %d\n", sub_no, sec_no);
|
|
if (sec_no != sub_number) {
|
|
err ("there're more buses behind this bridge. Hot removal is not supported. Please choose another card\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
bus = ibmphp_find_res_bus (sec_number);
|
|
if (!bus) {
|
|
err ("cannot find Bus structure for the bridged device\n");
|
|
return -EINVAL;
|
|
}
|
|
debug("bus->busno is %x\n", bus->busno);
|
|
debug("sec_number is %x\n", sec_number);
|
|
|
|
ibmphp_remove_bus (bus, busno);
|
|
|
|
for (count = 0; address[count]; count++) {
|
|
/* for 2 BARs */
|
|
pci_bus_read_config_dword (ibmphp_pci_bus, devfn, address[count], &start_address);
|
|
|
|
if (!start_address) {
|
|
/* This BAR is not implemented */
|
|
continue;
|
|
}
|
|
|
|
tmp_address = start_address;
|
|
|
|
if (start_address & PCI_BASE_ADDRESS_SPACE_IO) {
|
|
/* This is IO */
|
|
start_address &= PCI_BASE_ADDRESS_IO_MASK;
|
|
if (ibmphp_find_resource (bus, start_address, &io, IO) < 0) {
|
|
err ("cannot find corresponding IO resource to remove\n");
|
|
return -EIO;
|
|
}
|
|
if (io)
|
|
debug ("io->start = %x\n", io->start);
|
|
|
|
ibmphp_remove_resource (io);
|
|
|
|
/* ????????? DO WE NEED TO WRITE ANYTHING INTO THE PCI CONFIG SPACE BACK ?????????? */
|
|
} else {
|
|
/* This is Memory */
|
|
if (start_address & PCI_BASE_ADDRESS_MEM_PREFETCH) {
|
|
/* pfmem */
|
|
start_address &= PCI_BASE_ADDRESS_MEM_MASK;
|
|
if (ibmphp_find_resource (bus, start_address, &pfmem, PFMEM) < 0) {
|
|
err ("cannot find corresponding PFMEM resource to remove\n");
|
|
return -EINVAL;
|
|
}
|
|
if (pfmem) {
|
|
debug ("pfmem->start = %x\n", pfmem->start);
|
|
|
|
ibmphp_remove_resource(pfmem);
|
|
}
|
|
} else {
|
|
/* regular memory */
|
|
start_address &= PCI_BASE_ADDRESS_MEM_MASK;
|
|
if (ibmphp_find_resource (bus, start_address, &mem, MEM) < 0) {
|
|
err ("cannot find corresponding MEM resource to remove\n");
|
|
return -EINVAL;
|
|
}
|
|
if (mem) {
|
|
debug ("mem->start = %x\n", mem->start);
|
|
|
|
ibmphp_remove_resource(mem);
|
|
}
|
|
}
|
|
if (tmp_address & PCI_BASE_ADDRESS_MEM_TYPE_64) {
|
|
/* takes up another dword */
|
|
count += 1;
|
|
}
|
|
} /* end of mem */
|
|
} /* end of for */
|
|
debug ("%s - exiting, returning success\n", __func__);
|
|
return 0;
|
|
}
|
|
|
|
static int unconfigure_boot_card (struct slot *slot_cur)
|
|
{
|
|
u16 vendor_id;
|
|
u32 class;
|
|
u8 hdr_type;
|
|
u8 device;
|
|
u8 busno;
|
|
u8 function;
|
|
int rc;
|
|
unsigned int devfn;
|
|
u8 valid_device = 0x00; /* To see if we are ever able to find valid device and read it */
|
|
|
|
debug ("%s - enter\n", __func__);
|
|
|
|
device = slot_cur->device;
|
|
busno = slot_cur->bus;
|
|
|
|
debug ("b4 for loop, device is %x\n", device);
|
|
/* For every function on the card */
|
|
for (function = 0x0; function < 0x08; function++) {
|
|
devfn = PCI_DEVFN(device, function);
|
|
ibmphp_pci_bus->number = busno;
|
|
|
|
pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_VENDOR_ID, &vendor_id);
|
|
|
|
if (vendor_id != PCI_VENDOR_ID_NOTVALID) {
|
|
/* found correct device!!! */
|
|
++valid_device;
|
|
|
|
debug ("%s - found correct device\n", __func__);
|
|
|
|
/* header: x x x x x x x x
|
|
* | |___________|=> 1=PPB bridge, 0=normal device, 2=CardBus Bridge
|
|
* |_=> 0 = single function device, 1 = multi-function device
|
|
*/
|
|
|
|
pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_HEADER_TYPE, &hdr_type);
|
|
pci_bus_read_config_dword (ibmphp_pci_bus, devfn, PCI_CLASS_REVISION, &class);
|
|
|
|
debug ("hdr_type %x, class %x\n", hdr_type, class);
|
|
class >>= 8; /* to take revision out, class = class.subclass.prog i/f */
|
|
if (class == PCI_CLASS_NOT_DEFINED_VGA) {
|
|
err ("The device %x function %x is VGA compatible and is not supported for hot removing. Please choose another device.\n", device, function);
|
|
return -ENODEV;
|
|
} else if (class == PCI_CLASS_DISPLAY_VGA) {
|
|
err ("The device %x function %x is not supported for hot removing. Please choose another device.\n", device, function);
|
|
return -ENODEV;
|
|
}
|
|
|
|
switch (hdr_type) {
|
|
case PCI_HEADER_TYPE_NORMAL:
|
|
rc = unconfigure_boot_device (busno, device, function);
|
|
if (rc) {
|
|
err ("was not able to unconfigure device %x func %x on bus %x. bailing out...\n",
|
|
device, function, busno);
|
|
return rc;
|
|
}
|
|
function = 0x8;
|
|
break;
|
|
case PCI_HEADER_TYPE_MULTIDEVICE:
|
|
rc = unconfigure_boot_device (busno, device, function);
|
|
if (rc) {
|
|
err ("was not able to unconfigure device %x func %x on bus %x. bailing out...\n",
|
|
device, function, busno);
|
|
return rc;
|
|
}
|
|
break;
|
|
case PCI_HEADER_TYPE_BRIDGE:
|
|
class >>= 8;
|
|
if (class != PCI_CLASS_BRIDGE_PCI) {
|
|
err ("This device %x function %x is not PCI-to-PCI bridge, and is not supported for hot-removing. Please try another card.\n", device, function);
|
|
return -ENODEV;
|
|
}
|
|
rc = unconfigure_boot_bridge (busno, device, function);
|
|
if (rc != 0) {
|
|
err ("was not able to hot-remove PPB properly.\n");
|
|
return rc;
|
|
}
|
|
|
|
function = 0x8;
|
|
break;
|
|
case PCI_HEADER_TYPE_MULTIBRIDGE:
|
|
class >>= 8;
|
|
if (class != PCI_CLASS_BRIDGE_PCI) {
|
|
err ("This device %x function %x is not PCI-to-PCI bridge, and is not supported for hot-removing. Please try another card.\n", device, function);
|
|
return -ENODEV;
|
|
}
|
|
rc = unconfigure_boot_bridge (busno, device, function);
|
|
if (rc != 0) {
|
|
err ("was not able to hot-remove PPB properly.\n");
|
|
return rc;
|
|
}
|
|
break;
|
|
default:
|
|
err ("MAJOR PROBLEM!!!! Cannot read device's header\n");
|
|
return -1;
|
|
break;
|
|
} /* end of switch */
|
|
} /* end of valid device */
|
|
} /* end of for */
|
|
|
|
if (!valid_device) {
|
|
err ("Could not find device to unconfigure. Or could not read the card.\n");
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* free the resources of the card (multi, single, or bridged)
|
|
* Parameters: slot, flag to say if this is for removing entire module or just
|
|
* unconfiguring the device
|
|
* TO DO: will probably need to add some code in case there was some resource,
|
|
* to remove it... this is from when we have errors in the configure_card...
|
|
* !!!!!!!!!!!!!!!!!!!!!!!!!FOR BUSES!!!!!!!!!!!!
|
|
* Returns: 0, -1, -ENODEV
|
|
*/
|
|
int ibmphp_unconfigure_card (struct slot **slot_cur, int the_end)
|
|
{
|
|
int i;
|
|
int count;
|
|
int rc;
|
|
struct slot *sl = *slot_cur;
|
|
struct pci_func *cur_func = NULL;
|
|
struct pci_func *temp_func;
|
|
|
|
debug ("%s - enter\n", __func__);
|
|
|
|
if (!the_end) {
|
|
/* Need to unconfigure the card */
|
|
rc = unconfigure_boot_card (sl);
|
|
if ((rc == -ENODEV) || (rc == -EIO) || (rc == -EINVAL)) {
|
|
/* In all other cases, will still need to get rid of func structure if it exists */
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
if (sl->func) {
|
|
cur_func = sl->func;
|
|
while (cur_func) {
|
|
/* TO DO: WILL MOST LIKELY NEED TO GET RID OF THE BUS STRUCTURE FROM RESOURCES AS WELL */
|
|
if (cur_func->bus) {
|
|
/* in other words, it's a PPB */
|
|
count = 2;
|
|
} else {
|
|
count = 6;
|
|
}
|
|
|
|
for (i = 0; i < count; i++) {
|
|
if (cur_func->io[i]) {
|
|
debug ("io[%d] exists\n", i);
|
|
if (the_end > 0)
|
|
ibmphp_remove_resource (cur_func->io[i]);
|
|
cur_func->io[i] = NULL;
|
|
}
|
|
if (cur_func->mem[i]) {
|
|
debug ("mem[%d] exists\n", i);
|
|
if (the_end > 0)
|
|
ibmphp_remove_resource (cur_func->mem[i]);
|
|
cur_func->mem[i] = NULL;
|
|
}
|
|
if (cur_func->pfmem[i]) {
|
|
debug ("pfmem[%d] exists\n", i);
|
|
if (the_end > 0)
|
|
ibmphp_remove_resource (cur_func->pfmem[i]);
|
|
cur_func->pfmem[i] = NULL;
|
|
}
|
|
}
|
|
|
|
temp_func = cur_func->next;
|
|
kfree (cur_func);
|
|
cur_func = temp_func;
|
|
}
|
|
}
|
|
|
|
sl->func = NULL;
|
|
*slot_cur = sl;
|
|
debug ("%s - exit\n", __func__);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* add a new bus resulting from hot-plugging a PPB bridge with devices
|
|
*
|
|
* Input: bus and the amount of resources needed (we know we can assign those,
|
|
* since they've been checked already
|
|
* Output: bus added to the correct spot
|
|
* 0, -1, error
|
|
*/
|
|
static int add_new_bus (struct bus_node *bus, struct resource_node *io, struct resource_node *mem, struct resource_node *pfmem, u8 parent_busno)
|
|
{
|
|
struct range_node *io_range = NULL;
|
|
struct range_node *mem_range = NULL;
|
|
struct range_node *pfmem_range = NULL;
|
|
struct bus_node *cur_bus = NULL;
|
|
|
|
/* Trying to find the parent bus number */
|
|
if (parent_busno != 0xFF) {
|
|
cur_bus = ibmphp_find_res_bus (parent_busno);
|
|
if (!cur_bus) {
|
|
err ("strange, cannot find bus which is supposed to be at the system... something is terribly wrong...\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
list_add (&bus->bus_list, &cur_bus->bus_list);
|
|
}
|
|
if (io) {
|
|
io_range = kzalloc(sizeof(*io_range), GFP_KERNEL);
|
|
if (!io_range) {
|
|
err ("out of system memory\n");
|
|
return -ENOMEM;
|
|
}
|
|
io_range->start = io->start;
|
|
io_range->end = io->end;
|
|
io_range->rangeno = 1;
|
|
bus->noIORanges = 1;
|
|
bus->rangeIO = io_range;
|
|
}
|
|
if (mem) {
|
|
mem_range = kzalloc(sizeof(*mem_range), GFP_KERNEL);
|
|
if (!mem_range) {
|
|
err ("out of system memory\n");
|
|
return -ENOMEM;
|
|
}
|
|
mem_range->start = mem->start;
|
|
mem_range->end = mem->end;
|
|
mem_range->rangeno = 1;
|
|
bus->noMemRanges = 1;
|
|
bus->rangeMem = mem_range;
|
|
}
|
|
if (pfmem) {
|
|
pfmem_range = kzalloc(sizeof(*pfmem_range), GFP_KERNEL);
|
|
if (!pfmem_range) {
|
|
err ("out of system memory\n");
|
|
return -ENOMEM;
|
|
}
|
|
pfmem_range->start = pfmem->start;
|
|
pfmem_range->end = pfmem->end;
|
|
pfmem_range->rangeno = 1;
|
|
bus->noPFMemRanges = 1;
|
|
bus->rangePFMem = pfmem_range;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* find the 1st available bus number for PPB to set as its secondary bus
|
|
* Parameters: bus_number of the primary bus
|
|
* Returns: bus_number of the secondary bus or 0xff in case of failure
|
|
*/
|
|
static u8 find_sec_number (u8 primary_busno, u8 slotno)
|
|
{
|
|
int min, max;
|
|
u8 busno;
|
|
struct bus_info *bus;
|
|
struct bus_node *bus_cur;
|
|
|
|
bus = ibmphp_find_same_bus_num (primary_busno);
|
|
if (!bus) {
|
|
err ("cannot get slot range of the bus from the BIOS\n");
|
|
return 0xff;
|
|
}
|
|
max = bus->slot_max;
|
|
min = bus->slot_min;
|
|
if ((slotno > max) || (slotno < min)) {
|
|
err ("got the wrong range\n");
|
|
return 0xff;
|
|
}
|
|
busno = (u8) (slotno - (u8) min);
|
|
busno += primary_busno + 0x01;
|
|
bus_cur = ibmphp_find_res_bus (busno);
|
|
/* either there is no such bus number, or there are no ranges, which
|
|
* can only happen if we removed the bridged device in previous load
|
|
* of the driver, and now only have the skeleton bus struct
|
|
*/
|
|
if ((!bus_cur) || (!(bus_cur->rangeIO) && !(bus_cur->rangeMem) && !(bus_cur->rangePFMem)))
|
|
return busno;
|
|
return 0xff;
|
|
}
|