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path: root/drivers/pci/dmar.c
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Diffstat (limited to 'drivers/pci/dmar.c')
-rw-r--r--drivers/pci/dmar.c343
1 files changed, 0 insertions, 343 deletions
diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
deleted file mode 100644
index 8bf86ae2333..00000000000
--- a/drivers/pci/dmar.c
+++ /dev/null
@@ -1,343 +0,0 @@
-/*
- * Copyright (c) 2006, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
- * Place - Suite 330, Boston, MA 02111-1307 USA.
- *
- * Copyright (C) 2006-2008 Intel Corporation
- * Author: Ashok Raj <ashok.raj@intel.com>
- * Author: Shaohua Li <shaohua.li@intel.com>
- * Author: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
- *
- * This file implements early detection/parsing of DMA Remapping Devices
- * reported to OS through BIOS via DMA remapping reporting (DMAR) ACPI
- * tables.
- */
-
-#include <linux/pci.h>
-#include <linux/dmar.h>
-#include "iova.h"
-#include "intel-iommu.h"
-
-#undef PREFIX
-#define PREFIX "DMAR:"
-
-/* No locks are needed as DMA remapping hardware unit
- * list is constructed at boot time and hotplug of
- * these units are not supported by the architecture.
- */
-LIST_HEAD(dmar_drhd_units);
-LIST_HEAD(dmar_rmrr_units);
-
-static struct acpi_table_header * __initdata dmar_tbl;
-
-static void __init dmar_register_drhd_unit(struct dmar_drhd_unit *drhd)
-{
- /*
- * add INCLUDE_ALL at the tail, so scan the list will find it at
- * the very end.
- */
- if (drhd->include_all)
- list_add_tail(&drhd->list, &dmar_drhd_units);
- else
- list_add(&drhd->list, &dmar_drhd_units);
-}
-
-static void __init dmar_register_rmrr_unit(struct dmar_rmrr_unit *rmrr)
-{
- list_add(&rmrr->list, &dmar_rmrr_units);
-}
-
-static int __init dmar_parse_one_dev_scope(struct acpi_dmar_device_scope *scope,
- struct pci_dev **dev, u16 segment)
-{
- struct pci_bus *bus;
- struct pci_dev *pdev = NULL;
- struct acpi_dmar_pci_path *path;
- int count;
-
- bus = pci_find_bus(segment, scope->bus);
- path = (struct acpi_dmar_pci_path *)(scope + 1);
- count = (scope->length - sizeof(struct acpi_dmar_device_scope))
- / sizeof(struct acpi_dmar_pci_path);
-
- while (count) {
- if (pdev)
- pci_dev_put(pdev);
- /*
- * Some BIOSes list non-exist devices in DMAR table, just
- * ignore it
- */
- if (!bus) {
- printk(KERN_WARNING
- PREFIX "Device scope bus [%d] not found\n",
- scope->bus);
- break;
- }
- pdev = pci_get_slot(bus, PCI_DEVFN(path->dev, path->fn));
- if (!pdev) {
- printk(KERN_WARNING PREFIX
- "Device scope device [%04x:%02x:%02x.%02x] not found\n",
- segment, bus->number, path->dev, path->fn);
- break;
- }
- path ++;
- count --;
- bus = pdev->subordinate;
- }
- if (!pdev) {
- printk(KERN_WARNING PREFIX
- "Device scope device [%04x:%02x:%02x.%02x] not found\n",
- segment, scope->bus, path->dev, path->fn);
- *dev = NULL;
- return 0;
- }
- if ((scope->entry_type == ACPI_DMAR_SCOPE_TYPE_ENDPOINT && \
- pdev->subordinate) || (scope->entry_type == \
- ACPI_DMAR_SCOPE_TYPE_BRIDGE && !pdev->subordinate)) {
- pci_dev_put(pdev);
- printk(KERN_WARNING PREFIX
- "Device scope type does not match for %s\n",
- pci_name(pdev));
- return -EINVAL;
- }
- *dev = pdev;
- return 0;
-}
-
-static int __init dmar_parse_dev_scope(void *start, void *end, int *cnt,
- struct pci_dev ***devices, u16 segment)
-{
- struct acpi_dmar_device_scope *scope;
- void * tmp = start;
- int index;
- int ret;
-
- *cnt = 0;
- while (start < end) {
- scope = start;
- if (scope->entry_type == ACPI_DMAR_SCOPE_TYPE_ENDPOINT ||
- scope->entry_type == ACPI_DMAR_SCOPE_TYPE_BRIDGE)
- (*cnt)++;
- else
- printk(KERN_WARNING PREFIX
- "Unsupported device scope\n");
- start += scope->length;
- }
- if (*cnt == 0)
- return 0;
-
- *devices = kcalloc(*cnt, sizeof(struct pci_dev *), GFP_KERNEL);
- if (!*devices)
- return -ENOMEM;
-
- start = tmp;
- index = 0;
- while (start < end) {
- scope = start;
- if (scope->entry_type == ACPI_DMAR_SCOPE_TYPE_ENDPOINT ||
- scope->entry_type == ACPI_DMAR_SCOPE_TYPE_BRIDGE) {
- ret = dmar_parse_one_dev_scope(scope,
- &(*devices)[index], segment);
- if (ret) {
- kfree(*devices);
- return ret;
- }
- index ++;
- }
- start += scope->length;
- }
-
- return 0;
-}
-
-/**
- * dmar_parse_one_drhd - parses exactly one DMA remapping hardware definition
- * structure which uniquely represent one DMA remapping hardware unit
- * present in the platform
- */
-static int __init
-dmar_parse_one_drhd(struct acpi_dmar_header *header)
-{
- struct acpi_dmar_hardware_unit *drhd;
- struct dmar_drhd_unit *dmaru;
- int ret = 0;
- static int include_all;
-
- dmaru = kzalloc(sizeof(*dmaru), GFP_KERNEL);
- if (!dmaru)
- return -ENOMEM;
-
- drhd = (struct acpi_dmar_hardware_unit *)header;
- dmaru->reg_base_addr = drhd->address;
- dmaru->include_all = drhd->flags & 0x1; /* BIT0: INCLUDE_ALL */
-
- if (!dmaru->include_all)
- ret = dmar_parse_dev_scope((void *)(drhd + 1),
- ((void *)drhd) + header->length,
- &dmaru->devices_cnt, &dmaru->devices,
- drhd->segment);
- else {
- /* Only allow one INCLUDE_ALL */
- if (include_all) {
- printk(KERN_WARNING PREFIX "Only one INCLUDE_ALL "
- "device scope is allowed\n");
- ret = -EINVAL;
- }
- include_all = 1;
- }
-
- if (ret || (dmaru->devices_cnt == 0 && !dmaru->include_all))
- kfree(dmaru);
- else
- dmar_register_drhd_unit(dmaru);
- return ret;
-}
-
-static int __init
-dmar_parse_one_rmrr(struct acpi_dmar_header *header)
-{
- struct acpi_dmar_reserved_memory *rmrr;
- struct dmar_rmrr_unit *rmrru;
- int ret = 0;
-
- rmrru = kzalloc(sizeof(*rmrru), GFP_KERNEL);
- if (!rmrru)
- return -ENOMEM;
-
- rmrr = (struct acpi_dmar_reserved_memory *)header;
- rmrru->base_address = rmrr->base_address;
- rmrru->end_address = rmrr->end_address;
- ret = dmar_parse_dev_scope((void *)(rmrr + 1),
- ((void *)rmrr) + header->length,
- &rmrru->devices_cnt, &rmrru->devices, rmrr->segment);
-
- if (ret || (rmrru->devices_cnt == 0))
- kfree(rmrru);
- else
- dmar_register_rmrr_unit(rmrru);
- return ret;
-}
-
-static void __init
-dmar_table_print_dmar_entry(struct acpi_dmar_header *header)
-{
- struct acpi_dmar_hardware_unit *drhd;
- struct acpi_dmar_reserved_memory *rmrr;
-
- switch (header->type) {
- case ACPI_DMAR_TYPE_HARDWARE_UNIT:
- drhd = (struct acpi_dmar_hardware_unit *)header;
- printk (KERN_INFO PREFIX
- "DRHD (flags: 0x%08x)base: 0x%016Lx\n",
- drhd->flags, drhd->address);
- break;
- case ACPI_DMAR_TYPE_RESERVED_MEMORY:
- rmrr = (struct acpi_dmar_reserved_memory *)header;
-
- printk (KERN_INFO PREFIX
- "RMRR base: 0x%016Lx end: 0x%016Lx\n",
- rmrr->base_address, rmrr->end_address);
- break;
- }
-}
-
-/**
- * parse_dmar_table - parses the DMA reporting table
- */
-static int __init
-parse_dmar_table(void)
-{
- struct acpi_table_dmar *dmar;
- struct acpi_dmar_header *entry_header;
- int ret = 0;
-
- dmar = (struct acpi_table_dmar *)dmar_tbl;
- if (!dmar)
- return -ENODEV;
-
- if (dmar->width < PAGE_SHIFT_4K - 1) {
- printk(KERN_WARNING PREFIX "Invalid DMAR haw\n");
- return -EINVAL;
- }
-
- printk (KERN_INFO PREFIX "Host address width %d\n",
- dmar->width + 1);
-
- entry_header = (struct acpi_dmar_header *)(dmar + 1);
- while (((unsigned long)entry_header) <
- (((unsigned long)dmar) + dmar_tbl->length)) {
- dmar_table_print_dmar_entry(entry_header);
-
- switch (entry_header->type) {
- case ACPI_DMAR_TYPE_HARDWARE_UNIT:
- ret = dmar_parse_one_drhd(entry_header);
- break;
- case ACPI_DMAR_TYPE_RESERVED_MEMORY:
- ret = dmar_parse_one_rmrr(entry_header);
- break;
- default:
- printk(KERN_WARNING PREFIX
- "Unknown DMAR structure type\n");
- ret = 0; /* for forward compatibility */
- break;
- }
- if (ret)
- break;
-
- entry_header = ((void *)entry_header + entry_header->length);
- }
- return ret;
-}
-
-
-int __init dmar_table_init(void)
-{
-
- int ret;
-
- ret = parse_dmar_table();
- if (ret) {
- printk(KERN_INFO PREFIX "parse DMAR table failure.\n");
- return ret;
- }
-
- if (list_empty(&dmar_drhd_units)) {
- printk(KERN_INFO PREFIX "No DMAR devices found\n");
- return -ENODEV;
- }
-
- if (list_empty(&dmar_rmrr_units))
- printk(KERN_INFO PREFIX "No RMRR found\n");
-
- return 0;
-}
-
-/**
- * early_dmar_detect - checks to see if the platform supports DMAR devices
- */
-int __init early_dmar_detect(void)
-{
- acpi_status status = AE_OK;
-
- /* if we could find DMAR table, then there are DMAR devices */
- status = acpi_get_table(ACPI_SIG_DMAR, 0,
- (struct acpi_table_header **)&dmar_tbl);
-
- if (ACPI_SUCCESS(status) && !dmar_tbl) {
- printk (KERN_WARNING PREFIX "Unable to map DMAR\n");
- status = AE_NOT_FOUND;
- }
-
- return (ACPI_SUCCESS(status) ? 1 : 0);
-}
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