| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Greg Kroah-Hartman | 8138 | 95.53% | 3 | 11.54% |
| Irene Zubarev | 121 | 1.42% | 1 | 3.85% |
| Rolf Eike Beer | 110 | 1.29% | 6 | 23.08% |
| Kristen Carlson Accardi | 29 | 0.34% | 1 | 3.85% |
| Eric Sesterhenn / Snakebyte | 21 | 0.25% | 1 | 3.85% |
| SF Markus Elfring | 17 | 0.20% | 1 | 3.85% |
| Björn Helgaas | 17 | 0.20% | 3 | 11.54% |
| Adrian Bunk | 16 | 0.19% | 1 | 3.85% |
| Randy Dunlap | 12 | 0.14% | 1 | 3.85% |
| Ryan Desfosses | 9 | 0.11% | 1 | 3.85% |
| Harvey Harrison | 9 | 0.11% | 1 | 3.85% |
| Quentin Lambert | 8 | 0.09% | 1 | 3.85% |
| Bogicevic Sasa | 8 | 0.09% | 1 | 3.85% |
| Steven Cole | 1 | 0.01% | 1 | 3.85% |
| Masanari Iida | 1 | 0.01% | 1 | 3.85% |
| Jordan, William P | 1 | 0.01% | 1 | 3.85% |
| Adam Kropelin | 1 | 0.01% | 1 | 3.85% |
| Total | 8519 | 26 |
// SPDX-License-Identifier: GPL-2.0+ /* * 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. * * 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->function = %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); rc = configure_device(cur_func); if (rc < 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); rc = configure_device(cur_func); if (rc < 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 = kzalloc(sizeof(*newfunc), GFP_KERNEL); if (!newfunc) return -ENOMEM; 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 = 0; for (i = 0; i < 32; i++) { if (func->devices[i]) { newfunc = kzalloc(sizeof(*newfunc), GFP_KERNEL); if (!newfunc) return -ENOMEM; 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 = 1; } } newfunc = kzalloc(sizeof(*newfunc), GFP_KERNEL); if (!newfunc) return -ENOMEM; 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 = 0; for (i = 0; i < 32; i++) { if (func->devices[i]) { debug("inside for loop, device is %x\n", i); newfunc = kzalloc(sizeof(*newfunc), GFP_KERNEL); if (!newfunc) return -ENOMEM; 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 = 1; } } 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", __func__); 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 * something 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] = kzalloc(sizeof(struct resource_node), GFP_KERNEL); if (!io[count]) return -ENOMEM; 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] = kzalloc(sizeof(struct resource_node), GFP_KERNEL); if (!pfmem[count]) return -ENOMEM; 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 = 0; if (ibmphp_check_resource(pfmem[count], 0) == 0) { ibmphp_add_resource(pfmem[count]); func->pfmem[count] = pfmem[count]; } else { mem_tmp = kzalloc(sizeof(*mem_tmp), GFP_KERNEL); if (!mem_tmp) { 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]) 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]) { 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]) { 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) { 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]) { 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) { 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) { 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) { 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) { 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) { 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 & 0x7f) == 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)) goto report_search_failure; 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)) goto report_search_failure; 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; report_search_failure: err("cannot find corresponding IO resource to remove\n"); return -EIO; } 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) 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) 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) 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; }
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