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path: root/drivers/pci/hotplug/pciehprm_nonacpi.c
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Diffstat (limited to 'drivers/pci/hotplug/pciehprm_nonacpi.c')
-rw-r--r--drivers/pci/hotplug/pciehprm_nonacpi.c501
1 files changed, 501 insertions, 0 deletions
diff --git a/drivers/pci/hotplug/pciehprm_nonacpi.c b/drivers/pci/hotplug/pciehprm_nonacpi.c
new file mode 100644
index 00000000000..79a0aa6238e
--- /dev/null
+++ b/drivers/pci/hotplug/pciehprm_nonacpi.c
@@ -0,0 +1,501 @@
+/*
+ * PCIEHPRM NONACPI: PHP Resource Manager for Non-ACPI/Legacy platform
+ *
+ * Copyright (C) 1995,2001 Compaq Computer Corporation
+ * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
+ * Copyright (C) 2001 IBM Corp.
+ * Copyright (C) 2003-2004 Intel Corporation
+ *
+ * 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 <greg@kroah.com>, <dely.l.sy@intel.com>
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <asm/uaccess.h>
+#ifdef CONFIG_IA64
+#include <asm/iosapic.h>
+#endif
+#include "pciehp.h"
+#include "pciehprm.h"
+#include "pciehprm_nonacpi.h"
+
+
+void pciehprm_cleanup(void)
+{
+ return;
+}
+
+int pciehprm_print_pirt(void)
+{
+ return 0;
+}
+
+int pciehprm_get_physical_slot_number(struct controller *ctrl, u32 *sun, u8 busnum, u8 devnum)
+{
+
+ *sun = (u8) (ctrl->first_slot);
+ return 0;
+}
+
+
+static void print_pci_resource ( struct pci_resource *aprh)
+{
+ struct pci_resource *res;
+
+ for (res = aprh; res; res = res->next)
+ dbg(" base= 0x%x length= 0x%x\n", res->base, res->length);
+}
+
+
+static void phprm_dump_func_res( struct pci_func *fun)
+{
+ struct pci_func *func = fun;
+
+ if (func->bus_head) {
+ dbg(": BUS Resources:\n");
+ print_pci_resource (func->bus_head);
+ }
+ if (func->io_head) {
+ dbg(": IO Resources:\n");
+ print_pci_resource (func->io_head);
+ }
+ if (func->mem_head) {
+ dbg(": MEM Resources:\n");
+ print_pci_resource (func->mem_head);
+ }
+ if (func->p_mem_head) {
+ dbg(": PMEM Resources:\n");
+ print_pci_resource (func->p_mem_head);
+ }
+}
+
+static int phprm_get_used_resources (
+ struct controller *ctrl,
+ struct pci_func *func
+ )
+{
+ return pciehp_save_used_resources (ctrl, func, !DISABLE_CARD);
+}
+
+static int phprm_delete_resource(
+ struct pci_resource **aprh,
+ ulong base,
+ ulong size)
+{
+ struct pci_resource *res;
+ struct pci_resource *prevnode;
+ struct pci_resource *split_node;
+ ulong tbase;
+
+ pciehp_resource_sort_and_combine(aprh);
+
+ for (res = *aprh; res; res = res->next) {
+ if (res->base > base)
+ continue;
+
+ if ((res->base + res->length) < (base + size))
+ continue;
+
+ if (res->base < base) {
+ tbase = base;
+
+ if ((res->length - (tbase - res->base)) < size)
+ continue;
+
+ split_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
+ if (!split_node)
+ return -ENOMEM;
+
+ split_node->base = res->base;
+ split_node->length = tbase - res->base;
+ res->base = tbase;
+ res->length -= split_node->length;
+
+ split_node->next = res->next;
+ res->next = split_node;
+ }
+
+ if (res->length >= size) {
+ split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
+ if (!split_node)
+ return -ENOMEM;
+
+ split_node->base = res->base + size;
+ split_node->length = res->length - size;
+ res->length = size;
+
+ split_node->next = res->next;
+ res->next = split_node;
+ }
+
+ if (*aprh == res) {
+ *aprh = res->next;
+ } else {
+ prevnode = *aprh;
+ while (prevnode->next != res)
+ prevnode = prevnode->next;
+
+ prevnode->next = res->next;
+ }
+ res->next = NULL;
+ kfree(res);
+ break;
+ }
+
+ return 0;
+}
+
+
+static int phprm_delete_resources(
+ struct pci_resource **aprh,
+ struct pci_resource *this
+ )
+{
+ struct pci_resource *res;
+
+ for (res = this; res; res = res->next)
+ phprm_delete_resource(aprh, res->base, res->length);
+
+ return 0;
+}
+
+
+static int configure_existing_function(
+ struct controller *ctrl,
+ struct pci_func *func
+ )
+{
+ int rc;
+
+ /* see how much resources the func has used. */
+ rc = phprm_get_used_resources (ctrl, func);
+
+ if (!rc) {
+ /* subtract the resources used by the func from ctrl resources */
+ rc = phprm_delete_resources (&ctrl->bus_head, func->bus_head);
+ rc |= phprm_delete_resources (&ctrl->io_head, func->io_head);
+ rc |= phprm_delete_resources (&ctrl->mem_head, func->mem_head);
+ rc |= phprm_delete_resources (&ctrl->p_mem_head, func->p_mem_head);
+ if (rc)
+ warn("aCEF: cannot del used resources\n");
+ } else
+ err("aCEF: cannot get used resources\n");
+
+ return rc;
+}
+
+static int pciehprm_delete_resource(
+ struct pci_resource **aprh,
+ ulong base,
+ ulong size)
+{
+ struct pci_resource *res;
+ struct pci_resource *prevnode;
+ struct pci_resource *split_node;
+ ulong tbase;
+
+ pciehp_resource_sort_and_combine(aprh);
+
+ for (res = *aprh; res; res = res->next) {
+ if (res->base > base)
+ continue;
+
+ if ((res->base + res->length) < (base + size))
+ continue;
+
+ if (res->base < base) {
+ tbase = base;
+
+ if ((res->length - (tbase - res->base)) < size)
+ continue;
+
+ split_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
+ if (!split_node)
+ return -ENOMEM;
+
+ split_node->base = res->base;
+ split_node->length = tbase - res->base;
+ res->base = tbase;
+ res->length -= split_node->length;
+
+ split_node->next = res->next;
+ res->next = split_node;
+ }
+
+ if (res->length >= size) {
+ split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
+ if (!split_node)
+ return -ENOMEM;
+
+ split_node->base = res->base + size;
+ split_node->length = res->length - size;
+ res->length = size;
+
+ split_node->next = res->next;
+ res->next = split_node;
+ }
+
+ if (*aprh == res) {
+ *aprh = res->next;
+ } else {
+ prevnode = *aprh;
+ while (prevnode->next != res)
+ prevnode = prevnode->next;
+
+ prevnode->next = res->next;
+ }
+ res->next = NULL;
+ kfree(res);
+ break;
+ }
+
+ return 0;
+}
+
+static int bind_pci_resources_to_slots ( struct controller *ctrl)
+{
+ struct pci_func *func, new_func;
+ int busn = ctrl->slot_bus;
+ int devn, funn;
+ u32 vid;
+
+ for (devn = 0; devn < 32; devn++) {
+ for (funn = 0; funn < 8; funn++) {
+ /*
+ if (devn == ctrl->device && funn == ctrl->function)
+ continue;
+ */
+ /* find out if this entry is for an occupied slot */
+ vid = 0xFFFFFFFF;
+
+ pci_bus_read_config_dword(ctrl->pci_dev->subordinate, PCI_DEVFN(devn, funn), PCI_VENDOR_ID, &vid);
+
+ if (vid != 0xFFFFFFFF) {
+ dbg("%s: vid = %x bus %x dev %x fun %x\n", __FUNCTION__,
+ vid, busn, devn, funn);
+ func = pciehp_slot_find(busn, devn, funn);
+ dbg("%s: func = %p\n", __FUNCTION__,func);
+ if (!func) {
+ memset(&new_func, 0, sizeof(struct pci_func));
+ new_func.bus = busn;
+ new_func.device = devn;
+ new_func.function = funn;
+ new_func.is_a_board = 1;
+ configure_existing_function(ctrl, &new_func);
+ phprm_dump_func_res(&new_func);
+ } else {
+ configure_existing_function(ctrl, func);
+ phprm_dump_func_res(func);
+ }
+ dbg("aCCF:existing PCI 0x%x Func ResourceDump\n", ctrl->bus);
+ }
+ }
+ }
+
+ return 0;
+}
+
+static void phprm_dump_ctrl_res( struct controller *ctlr)
+{
+ struct controller *ctrl = ctlr;
+
+ if (ctrl->bus_head) {
+ dbg(": BUS Resources:\n");
+ print_pci_resource (ctrl->bus_head);
+ }
+ if (ctrl->io_head) {
+ dbg(": IO Resources:\n");
+ print_pci_resource (ctrl->io_head);
+ }
+ if (ctrl->mem_head) {
+ dbg(": MEM Resources:\n");
+ print_pci_resource (ctrl->mem_head);
+ }
+ if (ctrl->p_mem_head) {
+ dbg(": PMEM Resources:\n");
+ print_pci_resource (ctrl->p_mem_head);
+ }
+}
+
+/*
+ * phprm_find_available_resources
+ *
+ * Finds available memory, IO, and IRQ resources for programming
+ * devices which may be added to the system
+ * this function is for hot plug ADD!
+ *
+ * returns 0 if success
+ */
+int pciehprm_find_available_resources(struct controller *ctrl)
+{
+ struct pci_func func;
+ u32 rc;
+
+ memset(&func, 0, sizeof(struct pci_func));
+
+ func.bus = ctrl->bus;
+ func.device = ctrl->device;
+ func.function = ctrl->function;
+ func.is_a_board = 1;
+
+ /* Get resources for this PCI bridge */
+ rc = pciehp_save_used_resources (ctrl, &func, !DISABLE_CARD);
+ dbg("%s: pciehp_save_used_resources rc = %d\n", __FUNCTION__, rc);
+
+ if (func.mem_head)
+ func.mem_head->next = ctrl->mem_head;
+ ctrl->mem_head = func.mem_head;
+
+ if (func.p_mem_head)
+ func.p_mem_head->next = ctrl->p_mem_head;
+ ctrl->p_mem_head = func.p_mem_head;
+
+ if (func.io_head)
+ func.io_head->next = ctrl->io_head;
+ ctrl->io_head = func.io_head;
+
+ if(func.bus_head)
+ func.bus_head->next = ctrl->bus_head;
+ ctrl->bus_head = func.bus_head;
+
+ if (ctrl->bus_head)
+ pciehprm_delete_resource(&ctrl->bus_head, ctrl->pci_dev->subordinate->number, 1);
+
+ dbg("%s:pre-Bind PCI 0x%x Ctrl Resource Dump\n", __FUNCTION__, ctrl->bus);
+ phprm_dump_ctrl_res(ctrl);
+
+ dbg("%s: before bind_pci_resources_to slots\n", __FUNCTION__);
+
+ bind_pci_resources_to_slots (ctrl);
+
+ dbg("%s:post-Bind PCI 0x%x Ctrl Resource Dump\n", __FUNCTION__, ctrl->bus);
+ phprm_dump_ctrl_res(ctrl);
+
+ return (rc);
+}
+
+int pciehprm_set_hpp(
+ struct controller *ctrl,
+ struct pci_func *func,
+ u8 card_type)
+{
+ u32 rc;
+ u8 temp_byte;
+ struct pci_bus lpci_bus, *pci_bus;
+ unsigned int devfn;
+ memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
+ pci_bus = &lpci_bus;
+ pci_bus->number = func->bus;
+ devfn = PCI_DEVFN(func->device, func->function);
+
+ temp_byte = 0x40; /* hard coded value for LT */
+ if (card_type == PCI_HEADER_TYPE_BRIDGE) {
+ /* set subordinate Latency Timer */
+ rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SEC_LATENCY_TIMER, temp_byte);
+
+ if (rc) {
+ dbg("%s: set secondary LT error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__,
+ func->bus, func->device, func->function);
+ return rc;
+ }
+ }
+
+ /* set base Latency Timer */
+ rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_LATENCY_TIMER, temp_byte);
+
+ if (rc) {
+ dbg("%s: set LT error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__, func->bus, func->device, func->function);
+ return rc;
+ }
+
+ /* set Cache Line size */
+ temp_byte = 0x08; /* hard coded value for CLS */
+
+ rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_CACHE_LINE_SIZE, temp_byte);
+
+ if (rc) {
+ dbg("%s: set CLS error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__, func->bus, func->device, func->function);
+ }
+
+ /* set enable_perr */
+ /* set enable_serr */
+
+ return rc;
+}
+
+void pciehprm_enable_card(
+ struct controller *ctrl,
+ struct pci_func *func,
+ u8 card_type)
+{
+ u16 command, bcommand;
+ struct pci_bus lpci_bus, *pci_bus;
+ unsigned int devfn;
+ int rc;
+
+ memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
+ pci_bus = &lpci_bus;
+ pci_bus->number = func->bus;
+ devfn = PCI_DEVFN(func->device, func->function);
+
+ rc = pci_bus_read_config_word(pci_bus, devfn, PCI_COMMAND, &command);
+
+ command |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR
+ | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE
+ | PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
+
+ rc = pci_bus_write_config_word(pci_bus, devfn, PCI_COMMAND, command);
+
+ if (card_type == PCI_HEADER_TYPE_BRIDGE) {
+
+ rc = pci_bus_read_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, &bcommand);
+
+ bcommand |= PCI_BRIDGE_CTL_PARITY | PCI_BRIDGE_CTL_SERR
+ | PCI_BRIDGE_CTL_NO_ISA;
+
+ rc = pci_bus_write_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, bcommand);
+ }
+}
+
+static int legacy_pciehprm_init_pci(void)
+{
+ return 0;
+}
+
+int pciehprm_init(enum php_ctlr_type ctrl_type)
+{
+ int retval;
+
+ switch (ctrl_type) {
+ case PCI:
+ retval = legacy_pciehprm_init_pci();
+ break;
+ default:
+ retval = -ENODEV;
+ break;
+ }
+
+ return retval;
+}
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