diff options
Diffstat (limited to 'drivers/pci/hotplug/ibmphp_pci.c')
| -rw-r--r-- | drivers/pci/hotplug/ibmphp_pci.c | 1747 |
1 files changed, 1747 insertions, 0 deletions
diff --git a/drivers/pci/hotplug/ibmphp_pci.c b/drivers/pci/hotplug/ibmphp_pci.c new file mode 100644 index 00000000000..2335fac65fb --- /dev/null +++ b/drivers/pci/hotplug/ibmphp_pci.c @@ -0,0 +1,1747 @@ +/* + * IBM Hot Plug Controller Driver + * + * Written By: Irene Zubarev, IBM Corporation + * + * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com) + * Copyright (C) 2001,2002 IBM Corp. + * + * All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for more + * details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * Send feedback to <gregkh@us.ibm.com> + * + */ + +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/pci.h> +#include <linux/list.h> +#include "ibmphp.h" + + +static int configure_device(struct pci_func *); +static int configure_bridge(struct pci_func **, u8); +static struct res_needed *scan_behind_bridge(struct pci_func *, u8); +static int add_new_bus (struct bus_node *, struct resource_node *, struct resource_node *, struct resource_node *, u8); +static u8 find_sec_number (u8 primary_busno, u8 slotno); + +/* + * NOTE..... If BIOS doesn't provide default routing, we assign: + * 9 for SCSI, 10 for LAN adapters, and 11 for everything else. + * If adapter is bridged, then we assign 11 to it and devices behind it. + * We also assign the same irq numbers for multi function devices. + * These are PIC mode, so shouldn't matter n.e.ways (hopefully) + */ +static void assign_alt_irq (struct pci_func * cur_func, u8 class_code) +{ + int j; + for (j = 0; j < 4; j++) { + if (cur_func->irq[j] == 0xff) { + switch (class_code) { + case PCI_BASE_CLASS_STORAGE: + cur_func->irq[j] = SCSI_IRQ; + break; + case PCI_BASE_CLASS_NETWORK: + cur_func->irq[j] = LAN_IRQ; + break; + default: + cur_func->irq[j] = OTHER_IRQ; + break; + } + } + } +} + +/* + * Configures the device to be added (will allocate needed resources if it + * can), the device can be a bridge or a regular pci device, can also be + * multi-functional + * + * Input: function to be added + * + * TO DO: The error case with Multifunction device or multi function bridge, + * if there is an error, will need to go through all previous functions and + * unconfigure....or can add some code into unconfigure_card.... + */ +int ibmphp_configure_card (struct pci_func *func, u8 slotno) +{ + u16 vendor_id; + u32 class; + u8 class_code; + u8 hdr_type, device, sec_number; + u8 function; + struct pci_func *newfunc; /* for multi devices */ + struct pci_func *cur_func, *prev_func; + int rc, i, j; + int cleanup_count; + u8 flag; + u8 valid_device = 0x00; /* to see if we are able to read from card any device info at all */ + + debug ("inside configure_card, func->busno = %x\n", func->busno); + + device = func->device; + cur_func = func; + + /* We only get bus and device from IRQ routing table. So at this point, + * func->busno is correct, and func->device contains only device (at the 5 + * highest bits) + */ + + /* For every function on the card */ + for (function = 0x00; function < 0x08; function++) { + unsigned int devfn = PCI_DEVFN(device, function); + ibmphp_pci_bus->number = cur_func->busno; + + cur_func->function = function; + + debug ("inside the loop, cur_func->busno = %x, cur_func->device = %x, cur_func->funcion = %x\n", + cur_func->busno, cur_func->device, cur_func->function); + + pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_VENDOR_ID, &vendor_id); + + debug ("vendor_id is %x\n", vendor_id); + if (vendor_id != PCI_VENDOR_ID_NOTVALID) { + /* found correct device!!! */ + debug ("found valid device, vendor_id = %x\n", vendor_id); + + ++valid_device; + + /* 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); + + class_code = class >> 24; + debug ("hrd_type = %x, class = %x, class_code %x\n", hdr_type, class, class_code); + 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", cur_func->device); + return -ENODEV; + } else if (class == PCI_CLASS_DISPLAY_VGA) { + err ("The device %x is not supported for hot plugging. " + "Please choose another device.\n", cur_func->device); + return -ENODEV; + } + switch (hdr_type) { + case PCI_HEADER_TYPE_NORMAL: + debug ("single device case.... vendor id = %x, hdr_type = %x, class = %x\n", vendor_id, hdr_type, class); + assign_alt_irq (cur_func, class_code); + if ((rc = configure_device (cur_func)) < 0) { + /* We need to do this in case some other BARs were properly inserted */ + err ("was not able to configure devfunc %x on bus %x.\n", + cur_func->device, cur_func->busno); + cleanup_count = 6; + goto error; + } + cur_func->next = NULL; + function = 0x8; + break; + case PCI_HEADER_TYPE_MULTIDEVICE: + assign_alt_irq (cur_func, class_code); + if ((rc = configure_device (cur_func)) < 0) { + /* We need to do this in case some other BARs were properly inserted */ + err ("was not able to configure devfunc %x on bus %x...bailing out\n", + cur_func->device, cur_func->busno); + cleanup_count = 6; + goto error; + } + newfunc = kmalloc(sizeof(*newfunc), GFP_KERNEL); + if (!newfunc) { + err ("out of system memory\n"); + return -ENOMEM; + } + memset (newfunc, 0, sizeof (struct pci_func)); + newfunc->busno = cur_func->busno; + newfunc->device = device; + cur_func->next = newfunc; + cur_func = newfunc; + for (j = 0; j < 4; j++) + newfunc->irq[j] = cur_func->irq[j]; + break; + case PCI_HEADER_TYPE_MULTIBRIDGE: + class >>= 8; + if (class != PCI_CLASS_BRIDGE_PCI) { + err ("This %x is not PCI-to-PCI bridge, and as is not supported for hot-plugging. " + "Please insert another card.\n", cur_func->device); + return -ENODEV; + } + assign_alt_irq (cur_func, class_code); + rc = configure_bridge (&cur_func, slotno); + if (rc == -ENODEV) { + err ("You chose to insert Single Bridge, or nested bridges, this is not supported...\n"); + err ("Bus %x, devfunc %x\n", cur_func->busno, cur_func->device); + return rc; + } + if (rc) { + /* We need to do this in case some other BARs were properly inserted */ + err ("was not able to hot-add PPB properly.\n"); + func->bus = 1; /* To indicate to the unconfigure function that this is a PPB */ + cleanup_count = 2; + goto error; + } + + pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_SECONDARY_BUS, &sec_number); + flag = FALSE; + for (i = 0; i < 32; i++) { + if (func->devices[i]) { + newfunc = kmalloc(sizeof(*newfunc), GFP_KERNEL); + if (!newfunc) { + err ("out of system memory\n"); + return -ENOMEM; + } + memset (newfunc, 0, sizeof (struct pci_func)); + newfunc->busno = sec_number; + newfunc->device = (u8) i; + for (j = 0; j < 4; j++) + newfunc->irq[j] = cur_func->irq[j]; + + if (flag) { + for (prev_func = cur_func; prev_func->next; prev_func = prev_func->next) ; + prev_func->next = newfunc; + } else + cur_func->next = newfunc; + + rc = ibmphp_configure_card (newfunc, slotno); + /* This could only happen if kmalloc failed */ + if (rc) { + /* We need to do this in case bridge itself got configured properly, but devices behind it failed */ + func->bus = 1; /* To indicate to the unconfigure function that this is a PPB */ + cleanup_count = 2; + goto error; + } + flag = TRUE; + } + } + + newfunc = kmalloc(sizeof(*newfunc), GFP_KERNEL); + if (!newfunc) { + err ("out of system memory\n"); + return -ENOMEM; + } + memset (newfunc, 0, sizeof (struct pci_func)); + newfunc->busno = cur_func->busno; + newfunc->device = device; + for (j = 0; j < 4; j++) + newfunc->irq[j] = cur_func->irq[j]; + for (prev_func = cur_func; prev_func->next; prev_func = prev_func->next) ; + prev_func->next = newfunc; + cur_func = newfunc; + break; + case PCI_HEADER_TYPE_BRIDGE: + class >>= 8; + debug ("class now is %x\n", class); + if (class != PCI_CLASS_BRIDGE_PCI) { + err ("This %x is not PCI-to-PCI bridge, and as is not supported for hot-plugging. " + "Please insert another card.\n", cur_func->device); + return -ENODEV; + } + + assign_alt_irq (cur_func, class_code); + + debug ("cur_func->busno b4 configure_bridge is %x\n", cur_func->busno); + rc = configure_bridge (&cur_func, slotno); + if (rc == -ENODEV) { + err ("You chose to insert Single Bridge, or nested bridges, this is not supported...\n"); + err ("Bus %x, devfunc %x\n", cur_func->busno, cur_func->device); + return rc; + } + if (rc) { + /* We need to do this in case some other BARs were properly inserted */ + func->bus = 1; /* To indicate to the unconfigure function that this is a PPB */ + err ("was not able to hot-add PPB properly.\n"); + cleanup_count = 2; + goto error; + } + debug ("cur_func->busno = %x, device = %x, function = %x\n", + cur_func->busno, device, function); + pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_SECONDARY_BUS, &sec_number); + debug ("after configuring bridge..., sec_number = %x\n", sec_number); + flag = FALSE; + for (i = 0; i < 32; i++) { + if (func->devices[i]) { + debug ("inside for loop, device is %x\n", i); + newfunc = kmalloc(sizeof(*newfunc), GFP_KERNEL); + if (!newfunc) { + err (" out of system memory\n"); + return -ENOMEM; + } + memset (newfunc, 0, sizeof (struct pci_func)); + newfunc->busno = sec_number; + newfunc->device = (u8) i; + for (j = 0; j < 4; j++) + newfunc->irq[j] = cur_func->irq[j]; + + if (flag) { + for (prev_func = cur_func; prev_func->next; prev_func = prev_func->next) ; + prev_func->next = newfunc; + } else + cur_func->next = newfunc; + + rc = ibmphp_configure_card (newfunc, slotno); + + /* Again, this case should not happen... For complete paranoia, will need to call remove_bus */ + if (rc) { + /* We need to do this in case some other BARs were properly inserted */ + func->bus = 1; /* To indicate to the unconfigure function that this is a PPB */ + cleanup_count = 2; + goto error; + } + flag = TRUE; + } + } + + function = 0x8; + break; + default: + err ("MAJOR PROBLEM!!!!, header type not supported? %x\n", hdr_type); + return -ENXIO; + break; + } /* end of switch */ + } /* end of valid device */ + } /* end of for */ + + if (!valid_device) { + err ("Cannot find any valid devices on the card. Or unable to read from card.\n"); + return -ENODEV; + } + + return 0; + +error: + for (i = 0; i < cleanup_count; i++) { + if (cur_func->io[i]) { + ibmphp_remove_resource (cur_func->io[i]); + cur_func->io[i] = NULL; + } else if (cur_func->pfmem[i]) { + ibmphp_remove_resource (cur_func->pfmem[i]); + cur_func->pfmem[i] = NULL; + } else if (cur_func->mem[i]) { + ibmphp_remove_resource (cur_func->mem[i]); + cur_func->mem[i] = NULL; + } + } + return rc; +} + +/* + * This function configures the pci BARs of a single device. + * Input: pointer to the pci_func + * Output: configured PCI, 0, or error + */ +static int configure_device (struct pci_func *func) +{ + u32 bar[6]; + 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 + }; + u8 irq; + int count; + int len[6]; + struct resource_node *io[6]; + struct resource_node *mem[6]; + struct resource_node *mem_tmp; + struct resource_node *pfmem[6]; + unsigned int devfn; + + debug ("%s - inside\n", __FUNCTION__); + + devfn = PCI_DEVFN(func->device, func->function); + ibmphp_pci_bus->number = func->busno; + + for (count = 0; address[count]; count++) { /* for 6 BARs */ + + /* not sure if i need this. per scott, said maybe need smth like this + if devices don't adhere 100% to the spec, so don't want to write + to the reserved bits + + pcibios_read_config_byte(cur_func->busno, cur_func->device, + PCI_BASE_ADDRESS_0 + 4 * count, &tmp); + if (tmp & 0x01) // IO + pcibios_write_config_dword(cur_func->busno, cur_func->device, + PCI_BASE_ADDRESS_0 + 4 * count, 0xFFFFFFFD); + else // Memory + pcibios_write_config_dword(cur_func->busno, cur_func->device, + PCI_BASE_ADDRESS_0 + 4 * 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]); + + if (!bar[count]) /* This BAR is not implemented */ + continue; + + debug ("Device %x BAR %d wants %x\n", func->device, count, bar[count]); + + if (bar[count] & PCI_BASE_ADDRESS_SPACE_IO) { + /* This is IO */ + debug ("inside IO SPACE\n"); + + len[count] = bar[count] & 0xFFFFFFFC; + len[count] = ~len[count] + 1; + + debug ("len[count] in IO %x, count %d\n", len[count], count); + + io[count] = kmalloc (sizeof (struct resource_node), GFP_KERNEL); + + if (!io[count]) { + err ("out of system memory\n"); + return -ENOMEM; + } + memset (io[count], 0, sizeof (struct resource_node)); + io[count]->type = IO; + io[count]->busno = func->busno; + io[count]->devfunc = PCI_DEVFN(func->device, func->function); + io[count]->len = len[count]; + if (ibmphp_check_resource(io[count], 0) == 0) { + ibmphp_add_resource (io[count]); + func->io[count] = io[count]; + } else { + err ("cannot allocate requested io for bus %x device %x function %x len %x\n", + func->busno, func->device, func->function, len[count]); + kfree (io[count]); + return -EIO; + } + pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], func->io[count]->start); + + /* _______________This is for debugging purposes only_____________________ */ + debug ("b4 writing, the IO address is %x\n", func->io[count]->start); + pci_bus_read_config_dword (ibmphp_pci_bus, devfn, address[count], &bar[count]); + debug ("after writing.... the start address is %x\n", bar[count]); + /* _________________________________________________________________________*/ + + } else { + /* This is Memory */ + if (bar[count] & PCI_BASE_ADDRESS_MEM_PREFETCH) { + /* pfmem */ + debug ("PFMEM SPACE\n"); + + len[count] = bar[count] & 0xFFFFFFF0; + len[count] = ~len[count] + 1; + + debug ("len[count] in PFMEM %x, count %d\n", len[count], count); + + pfmem[count] = kmalloc (sizeof (struct resource_node), GFP_KERNEL); + if (!pfmem[count]) { + err ("out of system memory\n"); + return -ENOMEM; + } + memset (pfmem[count], 0, sizeof (struct resource_node)); + pfmem[count]->type = PFMEM; + pfmem[count]->busno = func->busno; + pfmem[count]->devfunc = PCI_DEVFN(func->device, + func->function); + pfmem[count]->len = len[count]; + pfmem[count]->fromMem = FALSE; + if (ibmphp_check_resource (pfmem[count], 0) == 0) { + ibmphp_add_resource (pfmem[count]); + func->pfmem[count] = pfmem[count]; + } else { + mem_tmp = kmalloc(sizeof(*mem_tmp), GFP_KERNEL); + if (!mem_tmp) { + err ("out of system memory\n"); + kfree (pfmem[count]); + return -ENOMEM; + } + memset (mem_tmp, 0, sizeof (struct resource_node)); + 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 = TRUE; + 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] = kmalloc (sizeof (struct resource_node), GFP_KERNEL); + if (!mem[count]) { + err ("out of system memory\n"); + return -ENOMEM; + } + memset (mem[count], 0, sizeof (struct resource_node)); + 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_word (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 = FALSE; + u8 flag_mem = FALSE; + u8 flag_pfmem = FALSE; + u8 need_io_upper = FALSE; + u8 need_pfmem_upper = FALSE; + 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", __FUNCTION__); + + 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] = kmalloc (sizeof (struct resource_node), GFP_KERNEL); + + if (!bus_io[count]) { + err ("out of system memory\n"); + retval = -ENOMEM; + goto error; + } + memset (bus_io[count], 0, sizeof (struct resource_node)); + 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] = kmalloc (sizeof (struct resource_node), GFP_KERNEL); + if (!bus_pfmem[count]) { + err ("out of system memory\n"); + retval = -ENOMEM; + goto error; + } + memset (bus_pfmem[count], 0, sizeof (struct resource_node)); + 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 = FALSE; + if (ibmphp_check_resource (bus_pfmem[count], 0) == 0) { + ibmphp_add_resource (bus_pfmem[count]); + func->pfmem[count] = bus_pfmem[count]; + } else { + mem_tmp = kmalloc(sizeof(*mem_tmp), GFP_KERNEL); + if (!mem_tmp) { + err ("out of system memory\n"); + retval = -ENOMEM; + goto error; + } + memset (mem_tmp, 0, sizeof (struct resource_node)); + 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 = TRUE; + 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] = kmalloc (sizeof (struct resource_node), GFP_KERNEL); + if (!bus_mem[count]) { + err ("out of system memory\n"); + retval = -ENOMEM; + goto error; + } + memset (bus_mem[count], 0, sizeof (struct resource_node)); + 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 = TRUE; + } else { + debug ("it wants %x IO behind the bridge\n", amount_needed->io); + io = kmalloc(sizeof(*io), GFP_KERNEL); + + if (!io) { + err ("out of system memory\n"); + retval = -ENOMEM; + goto error; + } + memset (io, 0, sizeof (struct resource_node)); + 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 = TRUE; + } + } + + if (!amount_needed->mem) { + debug ("it doesn't want n.e.memory?\n"); + flag_mem = TRUE; + } else { + debug ("it wants %x memory behind the bridge\n", amount_needed->mem); + mem = kmalloc(sizeof(*mem), GFP_KERNEL); + if (!mem) { + err ("out of system memory\n"); + retval = -ENOMEM; + goto error; + } + memset (mem, 0, sizeof (struct resource_node)); + 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 = TRUE; + debug ("were we able to add mem\n"); + } + } + + if (!amount_needed->pfmem) { + debug ("it doesn't want n.e.pfmem mem?\n"); + flag_pfmem = TRUE; + } else { + debug ("it wants %x pfmemory behind the bridge\n", amount_needed->pfmem); + pfmem = kmalloc(sizeof(*pfmem), GFP_KERNEL); + if (!pfmem) { + err ("out of system memory\n"); + retval = -ENOMEM; + goto error; + } + memset (pfmem, 0, sizeof (struct resource_node)); + pfmem->type = PFMEM; + pfmem->busno = func->busno; + pfmem->devfunc = PCI_DEVFN(func->device, func->function); + pfmem->len = amount_needed->pfmem; + pfmem->fromMem = FALSE; + if (ibmphp_check_resource (pfmem, 1) == 0) { + ibmphp_add_resource (pfmem); + flag_pfmem = TRUE; + } else { + mem_tmp = kmalloc(sizeof(*mem_tmp), GFP_KERNEL); + if (!mem_tmp) { + err ("out of system memory\n"); + retval = -ENOMEM; + goto error; + } + memset (mem_tmp, 0, sizeof (struct resource_node)); + 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 = TRUE; + pfmem->rangeno = mem_tmp->rangeno; + ibmphp_add_pfmem_from_mem (pfmem); + flag_pfmem = TRUE; + } + } + } + + 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 = kmalloc(sizeof(*bus), GFP_KERNEL); + if (!bus) { + err ("out of system memory\n"); + retval = -ENOMEM; + goto error; + } + memset (bus, 0, sizeof (struct bus_node)); + 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 = TRUE; + } + if ((io_base & PCI_PREF_RANGE_TYPE_MASK) == PCI_PREF_RANGE_TYPE_64) { + debug ("pfmem 64\n"); + need_pfmem_upper = TRUE; + } + + 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); + _____________________________________ |