![Bjorn Helgaas](/assets/img/avatar_default.png)
ISAPNP, PNPBIOS, and ACPI describe the "possible resource settings" of a device, i.e., the possibilities an OS bus driver has when it assigns I/O port, MMIO, and other resources to the device. PNP used to maintain this "possible resource setting" information in one independent option structure and a list of dependent option structures for each device. Each of these option structures had lists of I/O, memory, IRQ, and DMA resources, for example: dev independent options ind-io0 -> ind-io1 ... ind-mem0 -> ind-mem1 ... ... dependent option set 0 dep0-io0 -> dep0-io1 ... dep0-mem0 -> dep0-mem1 ... ... dependent option set 1 dep1-io0 -> dep1-io1 ... dep1-mem0 -> dep1-mem1 ... ... ... This data structure was designed for ISAPNP, where the OS configures device resource settings by writing directly to configuration registers. The OS can write the registers in arbitrary order much like it writes PCI BARs. However, for PNPBIOS and ACPI devices, the OS uses firmware interfaces that perform device configuration, and it is important to pass the desired settings to those interfaces in the correct order. The OS learns the correct order by using firmware interfaces that return the "current resource settings" and "possible resource settings," but the option structures above doesn't store the ordering information. This patch replaces the independent and dependent lists with a single list of options. For example, a device might have possible resource settings like this: dev options ind-io0 -> dep0-io0 -> dep1->io0 -> ind-io1 ... All the possible settings are in the same list, in the order they come from the firmware "possible resource settings" list. Each entry is tagged with an independent/dependent flag. Dependent entries also have a "set number" and an optional priority value. All dependent entries must be assigned from the same set. For example, the OS can use all the entries from dependent set 0, or all the entries from dependent set 1, but it cannot mix entries from set 0 with entries from set 1. Prior to this patch PNP didn't keep track of the order of this list, and it assigned all independent options first, then all dependent ones. Using the example above, that resulted in a "desired configuration" list like this: ind->io0 -> ind->io1 -> depN-io0 ... instead of the list the firmware expects, which looks like this: ind->io0 -> depN-io0 -> ind-io1 ... Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> Acked-by: Rene Herman <rene.herman@gmail.com> Signed-off-by: Len Brown <len.brown@intel.com>
344 lines
9.2 KiB
C
344 lines
9.2 KiB
C
/*
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* This file contains quirk handling code for PnP devices
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* Some devices do not report all their resources, and need to have extra
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* resources added. This is most easily accomplished at initialisation time
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* when building up the resource structure for the first time.
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*
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* Copyright (c) 2000 Peter Denison <peterd@pnd-pc.demon.co.uk>
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* Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
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* Bjorn Helgaas <bjorn.helgaas@hp.com>
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*
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* Heavily based on PCI quirks handling which is
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*
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* Copyright (c) 1999 Martin Mares <mj@ucw.cz>
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*/
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <linux/pnp.h>
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#include <linux/io.h>
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#include <linux/kallsyms.h>
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#include "base.h"
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static void quirk_awe32_add_ports(struct pnp_dev *dev,
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struct pnp_option *option,
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unsigned int offset)
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{
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struct pnp_option *new_option;
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new_option = kmalloc(sizeof(struct pnp_option), GFP_KERNEL);
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if (!new_option) {
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dev_err(&dev->dev, "couldn't add ioport region to option set "
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"%d\n", pnp_option_set(option));
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return;
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}
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*new_option = *option;
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new_option->u.port.min += offset;
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new_option->u.port.max += offset;
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list_add(&new_option->list, &option->list);
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dev_info(&dev->dev, "added ioport region %#llx-%#llx to set %d\n",
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(unsigned long long) new_option->u.port.min,
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(unsigned long long) new_option->u.port.max,
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pnp_option_set(option));
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}
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static void quirk_awe32_resources(struct pnp_dev *dev)
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{
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struct pnp_option *option;
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unsigned int set = ~0;
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/*
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* Add two extra ioport regions (at offset 0x400 and 0x800 from the
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* one given) to every dependent option set.
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*/
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list_for_each_entry(option, &dev->options, list) {
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if (pnp_option_is_dependent(option) &&
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pnp_option_set(option) != set) {
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set = pnp_option_set(option);
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quirk_awe32_add_ports(dev, option, 0x800);
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quirk_awe32_add_ports(dev, option, 0x400);
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}
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}
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}
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static void quirk_cmi8330_resources(struct pnp_dev *dev)
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{
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struct pnp_option *option;
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struct pnp_irq *irq;
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struct pnp_dma *dma;
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list_for_each_entry(option, &dev->options, list) {
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if (!pnp_option_is_dependent(option))
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continue;
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if (option->type == IORESOURCE_IRQ) {
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irq = &option->u.irq;
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bitmap_zero(irq->map.bits, PNP_IRQ_NR);
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__set_bit(5, irq->map.bits);
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__set_bit(7, irq->map.bits);
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__set_bit(10, irq->map.bits);
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dev_info(&dev->dev, "set possible IRQs in "
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"option set %d to 5, 7, 10\n",
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pnp_option_set(option));
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} else if (option->type == IORESOURCE_DMA) {
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dma = &option->u.dma;
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if ((dma->flags & IORESOURCE_DMA_TYPE_MASK) ==
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IORESOURCE_DMA_8BIT &&
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dma->map != 0x0A) {
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dev_info(&dev->dev, "changing possible "
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"DMA channel mask in option set %d "
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"from %#02x to 0x0A (1, 3)\n",
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pnp_option_set(option), dma->map);
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dma->map = 0x0A;
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}
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}
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}
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}
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static void quirk_sb16audio_resources(struct pnp_dev *dev)
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{
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struct pnp_option *option;
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unsigned int prev_option_flags = ~0, n = 0;
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struct pnp_port *port;
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/*
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* The default range on the OPL port for these devices is 0x388-0x388.
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* Here we increase that range so that two such cards can be
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* auto-configured.
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*/
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list_for_each_entry(option, &dev->options, list) {
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if (prev_option_flags != option->flags) {
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prev_option_flags = option->flags;
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n = 0;
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}
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if (pnp_option_is_dependent(option) &&
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option->type == IORESOURCE_IO) {
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n++;
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port = &option->u.port;
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if (n == 3 && port->min == port->max) {
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port->max += 0x70;
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dev_info(&dev->dev, "increased option port "
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"range from %#llx-%#llx to "
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"%#llx-%#llx\n",
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(unsigned long long) port->min,
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(unsigned long long) port->min,
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(unsigned long long) port->min,
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(unsigned long long) port->max);
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}
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}
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}
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}
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static struct pnp_option *pnp_clone_dependent_set(struct pnp_dev *dev,
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unsigned int set)
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{
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struct pnp_option *tail = NULL, *first_new_option = NULL;
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struct pnp_option *option, *new_option;
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unsigned int flags;
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list_for_each_entry(option, &dev->options, list) {
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if (pnp_option_is_dependent(option))
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tail = option;
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}
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if (!tail) {
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dev_err(&dev->dev, "no dependent option sets\n");
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return NULL;
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}
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flags = pnp_new_dependent_set(dev, PNP_RES_PRIORITY_FUNCTIONAL);
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list_for_each_entry(option, &dev->options, list) {
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if (pnp_option_is_dependent(option) &&
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pnp_option_set(option) == set) {
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new_option = kmalloc(sizeof(struct pnp_option),
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GFP_KERNEL);
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if (!new_option) {
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dev_err(&dev->dev, "couldn't clone dependent "
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"set %d\n", set);
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return NULL;
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}
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*new_option = *option;
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new_option->flags = flags;
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if (!first_new_option)
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first_new_option = new_option;
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list_add(&new_option->list, &tail->list);
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tail = new_option;
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}
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}
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return first_new_option;
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}
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static void quirk_add_irq_optional_dependent_sets(struct pnp_dev *dev)
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{
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struct pnp_option *new_option;
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unsigned int num_sets, i, set;
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struct pnp_irq *irq;
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num_sets = dev->num_dependent_sets;
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for (i = 0; i < num_sets; i++) {
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new_option = pnp_clone_dependent_set(dev, i);
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if (!new_option)
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return;
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set = pnp_option_set(new_option);
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while (new_option && pnp_option_set(new_option) == set) {
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if (new_option->type == IORESOURCE_IRQ) {
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irq = &new_option->u.irq;
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irq->flags |= IORESOURCE_IRQ_OPTIONAL;
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}
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dbg_pnp_show_option(dev, new_option);
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new_option = list_entry(new_option->list.next,
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struct pnp_option, list);
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}
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dev_info(&dev->dev, "added dependent option set %d (same as "
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"set %d except IRQ optional)\n", set, i);
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}
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}
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static void quirk_ad1815_mpu_resources(struct pnp_dev *dev)
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{
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struct pnp_option *option;
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struct pnp_irq *irq = NULL;
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unsigned int independent_irqs = 0;
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list_for_each_entry(option, &dev->options, list) {
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if (option->type == IORESOURCE_IRQ &&
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!pnp_option_is_dependent(option)) {
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independent_irqs++;
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irq = &option->u.irq;
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}
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}
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if (independent_irqs != 1)
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return;
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irq->flags |= IORESOURCE_IRQ_OPTIONAL;
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dev_info(&dev->dev, "made independent IRQ optional\n");
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}
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#include <linux/pci.h>
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static void quirk_system_pci_resources(struct pnp_dev *dev)
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{
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struct pci_dev *pdev = NULL;
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struct resource *res;
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resource_size_t pnp_start, pnp_end, pci_start, pci_end;
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int i, j;
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/*
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* Some BIOSes have PNP motherboard devices with resources that
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* partially overlap PCI BARs. The PNP system driver claims these
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* motherboard resources, which prevents the normal PCI driver from
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* requesting them later.
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*
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* This patch disables the PNP resources that conflict with PCI BARs
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* so they won't be claimed by the PNP system driver.
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*/
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for_each_pci_dev(pdev) {
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for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
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if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM) ||
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pci_resource_len(pdev, i) == 0)
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continue;
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pci_start = pci_resource_start(pdev, i);
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pci_end = pci_resource_end(pdev, i);
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for (j = 0;
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(res = pnp_get_resource(dev, IORESOURCE_MEM, j));
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j++) {
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if (res->start == 0 && res->end == 0)
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continue;
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pnp_start = res->start;
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pnp_end = res->end;
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/*
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* If the PNP region doesn't overlap the PCI
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* region at all, there's no problem.
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*/
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if (pnp_end < pci_start || pnp_start > pci_end)
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continue;
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/*
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* If the PNP region completely encloses (or is
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* at least as large as) the PCI region, that's
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* also OK. For example, this happens when the
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* PNP device describes a bridge with PCI
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* behind it.
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*/
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if (pnp_start <= pci_start &&
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pnp_end >= pci_end)
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continue;
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/*
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* Otherwise, the PNP region overlaps *part* of
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* the PCI region, and that might prevent a PCI
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* driver from requesting its resources.
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*/
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dev_warn(&dev->dev, "mem resource "
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"(0x%llx-0x%llx) overlaps %s BAR %d "
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"(0x%llx-0x%llx), disabling\n",
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(unsigned long long) pnp_start,
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(unsigned long long) pnp_end,
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pci_name(pdev), i,
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(unsigned long long) pci_start,
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(unsigned long long) pci_end);
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res->flags |= IORESOURCE_DISABLED;
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}
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}
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}
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}
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/*
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* PnP Quirks
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* Cards or devices that need some tweaking due to incomplete resource info
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*/
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static struct pnp_fixup pnp_fixups[] = {
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/* Soundblaster awe io port quirk */
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{"CTL0021", quirk_awe32_resources},
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{"CTL0022", quirk_awe32_resources},
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{"CTL0023", quirk_awe32_resources},
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/* CMI 8330 interrupt and dma fix */
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{"@X@0001", quirk_cmi8330_resources},
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/* Soundblaster audio device io port range quirk */
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{"CTL0001", quirk_sb16audio_resources},
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{"CTL0031", quirk_sb16audio_resources},
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{"CTL0041", quirk_sb16audio_resources},
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{"CTL0042", quirk_sb16audio_resources},
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{"CTL0043", quirk_sb16audio_resources},
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{"CTL0044", quirk_sb16audio_resources},
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{"CTL0045", quirk_sb16audio_resources},
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/* Add IRQ-optional MPU options */
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{"ADS7151", quirk_ad1815_mpu_resources},
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{"ADS7181", quirk_add_irq_optional_dependent_sets},
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{"AZT0002", quirk_add_irq_optional_dependent_sets},
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/* PnP resources that might overlap PCI BARs */
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{"PNP0c01", quirk_system_pci_resources},
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{"PNP0c02", quirk_system_pci_resources},
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{""}
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};
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void pnp_fixup_device(struct pnp_dev *dev)
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{
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struct pnp_fixup *f;
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for (f = pnp_fixups; *f->id; f++) {
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if (!compare_pnp_id(dev->id, f->id))
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continue;
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#ifdef DEBUG
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dev_dbg(&dev->dev, "%s: calling ", f->id);
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print_fn_descriptor_symbol("%s\n", f->quirk_function);
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#endif
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f->quirk_function(dev);
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}
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}
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