linux/drivers/pnp/resource.c

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/*
* resource.c - Contains functions for registering and analyzing resource information
*
* based on isapnp.c resource management (c) Jaroslav Kysela <perex@perex.cz>
* Copyright 2003 Adam Belay <ambx1@neo.rr.com>
*/
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/irq.h>
#include <linux/pci.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/pnp.h>
#include "base.h"
static int pnp_reserve_irq[16] = {[0 ... 15] = -1 }; /* reserve (don't use) some IRQ */
static int pnp_reserve_dma[8] = {[0 ... 7] = -1 }; /* reserve (don't use) some DMA */
static int pnp_reserve_io[16] = {[0 ... 15] = -1 }; /* reserve (don't use) some I/O region */
static int pnp_reserve_mem[16] = {[0 ... 15] = -1 }; /* reserve (don't use) some memory region */
/*
* option registration
*/
struct pnp_option *pnp_build_option(int priority)
{
struct pnp_option *option = pnp_alloc(sizeof(struct pnp_option));
if (!option)
return NULL;
option->priority = priority & 0xff;
/* make sure the priority is valid */
if (option->priority > PNP_RES_PRIORITY_FUNCTIONAL)
option->priority = PNP_RES_PRIORITY_INVALID;
return option;
}
struct pnp_option *pnp_register_independent_option(struct pnp_dev *dev)
{
struct pnp_option *option;
option = pnp_build_option(PNP_RES_PRIORITY_PREFERRED);
/* this should never happen but if it does we'll try to continue */
if (dev->independent)
dev_err(&dev->dev, "independent resource already registered\n");
dev->independent = option;
dev_dbg(&dev->dev, "new independent option\n");
return option;
}
struct pnp_option *pnp_register_dependent_option(struct pnp_dev *dev,
int priority)
{
struct pnp_option *option;
option = pnp_build_option(priority);
if (dev->dependent) {
struct pnp_option *parent = dev->dependent;
while (parent->next)
parent = parent->next;
parent->next = option;
} else
dev->dependent = option;
dev_dbg(&dev->dev, "new dependent option (priority %#x)\n", priority);
return option;
}
int pnp_register_irq_resource(struct pnp_dev *dev, struct pnp_option *option,
pnp_irq_mask_t *map, unsigned char flags)
{
struct pnp_irq *data, *ptr;
#ifdef DEBUG
char buf[PNP_IRQ_NR]; /* hex-encoded, so this is overkill but safe */
#endif
data = kzalloc(sizeof(struct pnp_irq), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->map = *map;
data->flags = flags;
ptr = option->irq;
while (ptr && ptr->next)
ptr = ptr->next;
if (ptr)
ptr->next = data;
else
option->irq = data;
#ifdef CONFIG_PCI
{
int i;
for (i = 0; i < 16; i++)
if (test_bit(i, data->map.bits))
pcibios_penalize_isa_irq(i, 0);
}
#endif
#ifdef DEBUG
bitmap_scnprintf(buf, sizeof(buf), data->map.bits, PNP_IRQ_NR);
dev_dbg(&dev->dev, " irq bitmask %s flags %#x\n", buf,
data->flags);
#endif
return 0;
}
int pnp_register_dma_resource(struct pnp_dev *dev, struct pnp_option *option,
unsigned char map, unsigned char flags)
{
struct pnp_dma *data, *ptr;
data = kzalloc(sizeof(struct pnp_dma), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->map = map;
data->flags = flags;
ptr = option->dma;
while (ptr && ptr->next)
ptr = ptr->next;
if (ptr)
ptr->next = data;
else
option->dma = data;
dev_dbg(&dev->dev, " dma bitmask %#x flags %#x\n", data->map,
data->flags);
return 0;
}
int pnp_register_port_resource(struct pnp_dev *dev, struct pnp_option *option,
resource_size_t min, resource_size_t max,
resource_size_t align, resource_size_t size,
unsigned char flags)
{
struct pnp_port *data, *ptr;
data = kzalloc(sizeof(struct pnp_port), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->min = min;
data->max = max;
data->align = align;
data->size = size;
data->flags = flags;
ptr = option->port;
while (ptr && ptr->next)
ptr = ptr->next;
if (ptr)
ptr->next = data;
else
option->port = data;
dev_dbg(&dev->dev, " io "
"min %#llx max %#llx align %lld size %lld flags %#x\n",
(unsigned long long) data->min,
(unsigned long long) data->max,
(unsigned long long) data->align,
(unsigned long long) data->size, data->flags);
return 0;
}
int pnp_register_mem_resource(struct pnp_dev *dev, struct pnp_option *option,
resource_size_t min, resource_size_t max,
resource_size_t align, resource_size_t size,
unsigned char flags)
{
struct pnp_mem *data, *ptr;
data = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->min = min;
data->max = max;
data->align = align;
data->size = size;
data->flags = flags;
ptr = option->mem;
while (ptr && ptr->next)
ptr = ptr->next;
if (ptr)
ptr->next = data;
else
option->mem = data;
dev_dbg(&dev->dev, " mem "
"min %#llx max %#llx align %lld size %lld flags %#x\n",
(unsigned long long) data->min,
(unsigned long long) data->max,
(unsigned long long) data->align,
(unsigned long long) data->size, data->flags);
return 0;
}
static void pnp_free_port(struct pnp_port *port)
{
struct pnp_port *next;
while (port) {
next = port->next;
kfree(port);
port = next;
}
}
static void pnp_free_irq(struct pnp_irq *irq)
{
struct pnp_irq *next;
while (irq) {
next = irq->next;
kfree(irq);
irq = next;
}
}
static void pnp_free_dma(struct pnp_dma *dma)
{
struct pnp_dma *next;
while (dma) {
next = dma->next;
kfree(dma);
dma = next;
}
}
static void pnp_free_mem(struct pnp_mem *mem)
{
struct pnp_mem *next;
while (mem) {
next = mem->next;
kfree(mem);
mem = next;
}
}
void pnp_free_option(struct pnp_option *option)
{
struct pnp_option *next;
while (option) {
next = option->next;
pnp_free_port(option->port);
pnp_free_irq(option->irq);
pnp_free_dma(option->dma);
pnp_free_mem(option->mem);
kfree(option);
option = next;
}
}
/*
* resource validity checking
*/
#define length(start, end) (*(end) - *(start) + 1)
/* Two ranges conflict if one doesn't end before the other starts */
#define ranged_conflict(starta, enda, startb, endb) \
!((*(enda) < *(startb)) || (*(endb) < *(starta)))
#define cannot_compare(flags) \
PNP: replace pnp_resource_table with dynamically allocated resources PNP used to have a fixed-size pnp_resource_table for tracking the resources used by a device. This table often overflowed, so we've had to increase the table size, which wastes memory because most devices have very few resources. This patch replaces the table with a linked list of resources where the entries are allocated on demand. This removes messages like these: pnpacpi: exceeded the max number of IO resources 00:01: too many I/O port resources References: http://bugzilla.kernel.org/show_bug.cgi?id=9535 http://bugzilla.kernel.org/show_bug.cgi?id=9740 http://lkml.org/lkml/2007/11/30/110 This patch also changes the way PNP uses the IORESOURCE_UNSET, IORESOURCE_AUTO, and IORESOURCE_DISABLED flags. Prior to this patch, the pnp_resource_table entries used the flags like this: IORESOURCE_UNSET This table entry is unused and available for use. When this flag is set, we shouldn't look at anything else in the resource structure. This flag is set when a resource table entry is initialized. IORESOURCE_AUTO This resource was assigned automatically by pnp_assign_{io,mem,etc}(). This flag is set when a resource table entry is initialized and cleared whenever we discover a resource setting by reading an ISAPNP config register, parsing a PNPBIOS resource data stream, parsing an ACPI _CRS list, or interpreting a sysfs "set" command. Resources marked IORESOURCE_AUTO are reinitialized and marked as IORESOURCE_UNSET by pnp_clean_resource_table() in these cases: - before we attempt to assign resources automatically, - if we fail to assign resources automatically, - after disabling a device IORESOURCE_DISABLED Set by pnp_assign_{io,mem,etc}() when automatic assignment fails. Also set by PNPBIOS and PNPACPI for: - invalid IRQs or GSI registration failures - invalid DMA channels - I/O ports above 0x10000 - mem ranges with negative length After this patch, there is no pnp_resource_table, and the resource list entries use the flags like this: IORESOURCE_UNSET This flag is no longer used in PNP. Instead of keeping IORESOURCE_UNSET entries in the resource list, we remove entries from the list and free them. IORESOURCE_AUTO No change in meaning: it still means the resource was assigned automatically by pnp_assign_{port,mem,etc}(), but these functions now set the bit explicitly. We still "clean" a device's resource list in the same places, but rather than reinitializing IORESOURCE_AUTO entries, we just remove them from the list. Note that IORESOURCE_AUTO entries are always at the end of the list, so removing them doesn't reorder other list entries. This is because non-IORESOURCE_AUTO entries are added by the ISAPNP, PNPBIOS, or PNPACPI "get resources" methods and by the sysfs "set" command. In each of these cases, we completely free the resource list first. IORESOURCE_DISABLED In addition to the cases where we used to set this flag, ISAPNP now adds an IORESOURCE_DISABLED resource when it reads a configuration register with a "disabled" value. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
2008-06-27 22:56:57 +00:00
((flags) & IORESOURCE_DISABLED)
int pnp_check_port(struct pnp_dev *dev, struct resource *res)
{
int i;
struct pnp_dev *tdev;
struct resource *tres;
resource_size_t *port, *end, *tport, *tend;
port = &res->start;
end = &res->end;
/* if the resource doesn't exist, don't complain about it */
if (cannot_compare(res->flags))
return 1;
/* check if the resource is already in use, skip if the
* device is active because it itself may be in use */
if (!dev->active) {
if (__check_region(&ioport_resource, *port, length(port, end)))
return 0;
}
/* check if the resource is reserved */
for (i = 0; i < 8; i++) {
int rport = pnp_reserve_io[i << 1];
int rend = pnp_reserve_io[(i << 1) + 1] + rport - 1;
if (ranged_conflict(port, end, &rport, &rend))
return 0;
}
/* check for internal conflicts */
for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_IO, i)); i++) {
if (tres != res && tres->flags & IORESOURCE_IO) {
tport = &tres->start;
tend = &tres->end;
if (ranged_conflict(port, end, tport, tend))
return 0;
}
}
/* check for conflicts with other pnp devices */
pnp_for_each_dev(tdev) {
if (tdev == dev)
continue;
for (i = 0;
(tres = pnp_get_resource(tdev, IORESOURCE_IO, i));
i++) {
if (tres->flags & IORESOURCE_IO) {
if (cannot_compare(tres->flags))
continue;
tport = &tres->start;
tend = &tres->end;
if (ranged_conflict(port, end, tport, tend))
return 0;
}
}
}
return 1;
}
int pnp_check_mem(struct pnp_dev *dev, struct resource *res)
{
int i;
struct pnp_dev *tdev;
struct resource *tres;
resource_size_t *addr, *end, *taddr, *tend;
addr = &res->start;
end = &res->end;
/* if the resource doesn't exist, don't complain about it */
if (cannot_compare(res->flags))
return 1;
/* check if the resource is already in use, skip if the
* device is active because it itself may be in use */
if (!dev->active) {
if (check_mem_region(*addr, length(addr, end)))
return 0;
}
/* check if the resource is reserved */
for (i = 0; i < 8; i++) {
int raddr = pnp_reserve_mem[i << 1];
int rend = pnp_reserve_mem[(i << 1) + 1] + raddr - 1;
if (ranged_conflict(addr, end, &raddr, &rend))
return 0;
}
/* check for internal conflicts */
for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_MEM, i)); i++) {
if (tres != res && tres->flags & IORESOURCE_MEM) {
taddr = &tres->start;
tend = &tres->end;
if (ranged_conflict(addr, end, taddr, tend))
return 0;
}
}
/* check for conflicts with other pnp devices */
pnp_for_each_dev(tdev) {
if (tdev == dev)
continue;
for (i = 0;
(tres = pnp_get_resource(tdev, IORESOURCE_MEM, i));
i++) {
if (tres->flags & IORESOURCE_MEM) {
if (cannot_compare(tres->flags))
continue;
taddr = &tres->start;
tend = &tres->end;
if (ranged_conflict(addr, end, taddr, tend))
return 0;
}
}
}
return 1;
}
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 13:55:46 +00:00
static irqreturn_t pnp_test_handler(int irq, void *dev_id)
{
return IRQ_HANDLED;
}
int pnp_check_irq(struct pnp_dev *dev, struct resource *res)
{
int i;
struct pnp_dev *tdev;
struct resource *tres;
resource_size_t *irq;
irq = &res->start;
/* if the resource doesn't exist, don't complain about it */
if (cannot_compare(res->flags))
return 1;
/* check if the resource is valid */
if (*irq < 0 || *irq > 15)
return 0;
/* check if the resource is reserved */
for (i = 0; i < 16; i++) {
if (pnp_reserve_irq[i] == *irq)
return 0;
}
/* check for internal conflicts */
for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_IRQ, i)); i++) {
if (tres != res && tres->flags & IORESOURCE_IRQ) {
if (tres->start == *irq)
return 0;
}
}
#ifdef CONFIG_PCI
/* check if the resource is being used by a pci device */
{
struct pci_dev *pci = NULL;
for_each_pci_dev(pci) {
if (pci->irq == *irq) {
pci_dev_put(pci);
return 0;
}
}
}
#endif
/* check if the resource is already in use, skip if the
* device is active because it itself may be in use */
if (!dev->active) {
if (request_irq(*irq, pnp_test_handler,
IRQF_DISABLED | IRQF_PROBE_SHARED, "pnp", NULL))
return 0;
free_irq(*irq, NULL);
}
/* check for conflicts with other pnp devices */
pnp_for_each_dev(tdev) {
if (tdev == dev)
continue;
for (i = 0;
(tres = pnp_get_resource(tdev, IORESOURCE_IRQ, i));
i++) {
if (tres->flags & IORESOURCE_IRQ) {
if (cannot_compare(tres->flags))
continue;
if (tres->start == *irq)
return 0;
}
}
}
return 1;
}
int pnp_check_dma(struct pnp_dev *dev, struct resource *res)
{
#ifndef CONFIG_IA64
int i;
struct pnp_dev *tdev;
struct resource *tres;
resource_size_t *dma;
dma = &res->start;
/* if the resource doesn't exist, don't complain about it */
if (cannot_compare(res->flags))
return 1;
/* check if the resource is valid */
if (*dma < 0 || *dma == 4 || *dma > 7)
return 0;
/* check if the resource is reserved */
for (i = 0; i < 8; i++) {
if (pnp_reserve_dma[i] == *dma)
return 0;
}
/* check for internal conflicts */
for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_DMA, i)); i++) {
if (tres != res && tres->flags & IORESOURCE_DMA) {
if (tres->start == *dma)
return 0;
}
}
/* check if the resource is already in use, skip if the
* device is active because it itself may be in use */
if (!dev->active) {
if (request_dma(*dma, "pnp"))
return 0;
free_dma(*dma);
}
/* check for conflicts with other pnp devices */
pnp_for_each_dev(tdev) {
if (tdev == dev)
continue;
for (i = 0;
(tres = pnp_get_resource(tdev, IORESOURCE_DMA, i));
i++) {
if (tres->flags & IORESOURCE_DMA) {
if (cannot_compare(tres->flags))
continue;
if (tres->start == *dma)
return 0;
}
}
}
return 1;
#else
/* IA64 does not have legacy DMA */
return 0;
#endif
}
int pnp_resource_type(struct resource *res)
{
return res->flags & (IORESOURCE_IO | IORESOURCE_MEM |
IORESOURCE_IRQ | IORESOURCE_DMA);
}
struct resource *pnp_get_resource(struct pnp_dev *dev,
unsigned int type, unsigned int num)
{
struct pnp_resource *pnp_res;
PNP: replace pnp_resource_table with dynamically allocated resources PNP used to have a fixed-size pnp_resource_table for tracking the resources used by a device. This table often overflowed, so we've had to increase the table size, which wastes memory because most devices have very few resources. This patch replaces the table with a linked list of resources where the entries are allocated on demand. This removes messages like these: pnpacpi: exceeded the max number of IO resources 00:01: too many I/O port resources References: http://bugzilla.kernel.org/show_bug.cgi?id=9535 http://bugzilla.kernel.org/show_bug.cgi?id=9740 http://lkml.org/lkml/2007/11/30/110 This patch also changes the way PNP uses the IORESOURCE_UNSET, IORESOURCE_AUTO, and IORESOURCE_DISABLED flags. Prior to this patch, the pnp_resource_table entries used the flags like this: IORESOURCE_UNSET This table entry is unused and available for use. When this flag is set, we shouldn't look at anything else in the resource structure. This flag is set when a resource table entry is initialized. IORESOURCE_AUTO This resource was assigned automatically by pnp_assign_{io,mem,etc}(). This flag is set when a resource table entry is initialized and cleared whenever we discover a resource setting by reading an ISAPNP config register, parsing a PNPBIOS resource data stream, parsing an ACPI _CRS list, or interpreting a sysfs "set" command. Resources marked IORESOURCE_AUTO are reinitialized and marked as IORESOURCE_UNSET by pnp_clean_resource_table() in these cases: - before we attempt to assign resources automatically, - if we fail to assign resources automatically, - after disabling a device IORESOURCE_DISABLED Set by pnp_assign_{io,mem,etc}() when automatic assignment fails. Also set by PNPBIOS and PNPACPI for: - invalid IRQs or GSI registration failures - invalid DMA channels - I/O ports above 0x10000 - mem ranges with negative length After this patch, there is no pnp_resource_table, and the resource list entries use the flags like this: IORESOURCE_UNSET This flag is no longer used in PNP. Instead of keeping IORESOURCE_UNSET entries in the resource list, we remove entries from the list and free them. IORESOURCE_AUTO No change in meaning: it still means the resource was assigned automatically by pnp_assign_{port,mem,etc}(), but these functions now set the bit explicitly. We still "clean" a device's resource list in the same places, but rather than reinitializing IORESOURCE_AUTO entries, we just remove them from the list. Note that IORESOURCE_AUTO entries are always at the end of the list, so removing them doesn't reorder other list entries. This is because non-IORESOURCE_AUTO entries are added by the ISAPNP, PNPBIOS, or PNPACPI "get resources" methods and by the sysfs "set" command. In each of these cases, we completely free the resource list first. IORESOURCE_DISABLED In addition to the cases where we used to set this flag, ISAPNP now adds an IORESOURCE_DISABLED resource when it reads a configuration register with a "disabled" value. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
2008-06-27 22:56:57 +00:00
struct resource *res;
PNP: replace pnp_resource_table with dynamically allocated resources PNP used to have a fixed-size pnp_resource_table for tracking the resources used by a device. This table often overflowed, so we've had to increase the table size, which wastes memory because most devices have very few resources. This patch replaces the table with a linked list of resources where the entries are allocated on demand. This removes messages like these: pnpacpi: exceeded the max number of IO resources 00:01: too many I/O port resources References: http://bugzilla.kernel.org/show_bug.cgi?id=9535 http://bugzilla.kernel.org/show_bug.cgi?id=9740 http://lkml.org/lkml/2007/11/30/110 This patch also changes the way PNP uses the IORESOURCE_UNSET, IORESOURCE_AUTO, and IORESOURCE_DISABLED flags. Prior to this patch, the pnp_resource_table entries used the flags like this: IORESOURCE_UNSET This table entry is unused and available for use. When this flag is set, we shouldn't look at anything else in the resource structure. This flag is set when a resource table entry is initialized. IORESOURCE_AUTO This resource was assigned automatically by pnp_assign_{io,mem,etc}(). This flag is set when a resource table entry is initialized and cleared whenever we discover a resource setting by reading an ISAPNP config register, parsing a PNPBIOS resource data stream, parsing an ACPI _CRS list, or interpreting a sysfs "set" command. Resources marked IORESOURCE_AUTO are reinitialized and marked as IORESOURCE_UNSET by pnp_clean_resource_table() in these cases: - before we attempt to assign resources automatically, - if we fail to assign resources automatically, - after disabling a device IORESOURCE_DISABLED Set by pnp_assign_{io,mem,etc}() when automatic assignment fails. Also set by PNPBIOS and PNPACPI for: - invalid IRQs or GSI registration failures - invalid DMA channels - I/O ports above 0x10000 - mem ranges with negative length After this patch, there is no pnp_resource_table, and the resource list entries use the flags like this: IORESOURCE_UNSET This flag is no longer used in PNP. Instead of keeping IORESOURCE_UNSET entries in the resource list, we remove entries from the list and free them. IORESOURCE_AUTO No change in meaning: it still means the resource was assigned automatically by pnp_assign_{port,mem,etc}(), but these functions now set the bit explicitly. We still "clean" a device's resource list in the same places, but rather than reinitializing IORESOURCE_AUTO entries, we just remove them from the list. Note that IORESOURCE_AUTO entries are always at the end of the list, so removing them doesn't reorder other list entries. This is because non-IORESOURCE_AUTO entries are added by the ISAPNP, PNPBIOS, or PNPACPI "get resources" methods and by the sysfs "set" command. In each of these cases, we completely free the resource list first. IORESOURCE_DISABLED In addition to the cases where we used to set this flag, ISAPNP now adds an IORESOURCE_DISABLED resource when it reads a configuration register with a "disabled" value. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
2008-06-27 22:56:57 +00:00
list_for_each_entry(pnp_res, &dev->resources, list) {
res = &pnp_res->res;
if (pnp_resource_type(res) == type && num-- == 0)
return res;
}
return NULL;
}
EXPORT_SYMBOL(pnp_get_resource);
PNP: replace pnp_resource_table with dynamically allocated resources PNP used to have a fixed-size pnp_resource_table for tracking the resources used by a device. This table often overflowed, so we've had to increase the table size, which wastes memory because most devices have very few resources. This patch replaces the table with a linked list of resources where the entries are allocated on demand. This removes messages like these: pnpacpi: exceeded the max number of IO resources 00:01: too many I/O port resources References: http://bugzilla.kernel.org/show_bug.cgi?id=9535 http://bugzilla.kernel.org/show_bug.cgi?id=9740 http://lkml.org/lkml/2007/11/30/110 This patch also changes the way PNP uses the IORESOURCE_UNSET, IORESOURCE_AUTO, and IORESOURCE_DISABLED flags. Prior to this patch, the pnp_resource_table entries used the flags like this: IORESOURCE_UNSET This table entry is unused and available for use. When this flag is set, we shouldn't look at anything else in the resource structure. This flag is set when a resource table entry is initialized. IORESOURCE_AUTO This resource was assigned automatically by pnp_assign_{io,mem,etc}(). This flag is set when a resource table entry is initialized and cleared whenever we discover a resource setting by reading an ISAPNP config register, parsing a PNPBIOS resource data stream, parsing an ACPI _CRS list, or interpreting a sysfs "set" command. Resources marked IORESOURCE_AUTO are reinitialized and marked as IORESOURCE_UNSET by pnp_clean_resource_table() in these cases: - before we attempt to assign resources automatically, - if we fail to assign resources automatically, - after disabling a device IORESOURCE_DISABLED Set by pnp_assign_{io,mem,etc}() when automatic assignment fails. Also set by PNPBIOS and PNPACPI for: - invalid IRQs or GSI registration failures - invalid DMA channels - I/O ports above 0x10000 - mem ranges with negative length After this patch, there is no pnp_resource_table, and the resource list entries use the flags like this: IORESOURCE_UNSET This flag is no longer used in PNP. Instead of keeping IORESOURCE_UNSET entries in the resource list, we remove entries from the list and free them. IORESOURCE_AUTO No change in meaning: it still means the resource was assigned automatically by pnp_assign_{port,mem,etc}(), but these functions now set the bit explicitly. We still "clean" a device's resource list in the same places, but rather than reinitializing IORESOURCE_AUTO entries, we just remove them from the list. Note that IORESOURCE_AUTO entries are always at the end of the list, so removing them doesn't reorder other list entries. This is because non-IORESOURCE_AUTO entries are added by the ISAPNP, PNPBIOS, or PNPACPI "get resources" methods and by the sysfs "set" command. In each of these cases, we completely free the resource list first. IORESOURCE_DISABLED In addition to the cases where we used to set this flag, ISAPNP now adds an IORESOURCE_DISABLED resource when it reads a configuration register with a "disabled" value. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
2008-06-27 22:56:57 +00:00
static struct pnp_resource *pnp_new_resource(struct pnp_dev *dev)
{
struct pnp_resource *pnp_res;
PNP: replace pnp_resource_table with dynamically allocated resources PNP used to have a fixed-size pnp_resource_table for tracking the resources used by a device. This table often overflowed, so we've had to increase the table size, which wastes memory because most devices have very few resources. This patch replaces the table with a linked list of resources where the entries are allocated on demand. This removes messages like these: pnpacpi: exceeded the max number of IO resources 00:01: too many I/O port resources References: http://bugzilla.kernel.org/show_bug.cgi?id=9535 http://bugzilla.kernel.org/show_bug.cgi?id=9740 http://lkml.org/lkml/2007/11/30/110 This patch also changes the way PNP uses the IORESOURCE_UNSET, IORESOURCE_AUTO, and IORESOURCE_DISABLED flags. Prior to this patch, the pnp_resource_table entries used the flags like this: IORESOURCE_UNSET This table entry is unused and available for use. When this flag is set, we shouldn't look at anything else in the resource structure. This flag is set when a resource table entry is initialized. IORESOURCE_AUTO This resource was assigned automatically by pnp_assign_{io,mem,etc}(). This flag is set when a resource table entry is initialized and cleared whenever we discover a resource setting by reading an ISAPNP config register, parsing a PNPBIOS resource data stream, parsing an ACPI _CRS list, or interpreting a sysfs "set" command. Resources marked IORESOURCE_AUTO are reinitialized and marked as IORESOURCE_UNSET by pnp_clean_resource_table() in these cases: - before we attempt to assign resources automatically, - if we fail to assign resources automatically, - after disabling a device IORESOURCE_DISABLED Set by pnp_assign_{io,mem,etc}() when automatic assignment fails. Also set by PNPBIOS and PNPACPI for: - invalid IRQs or GSI registration failures - invalid DMA channels - I/O ports above 0x10000 - mem ranges with negative length After this patch, there is no pnp_resource_table, and the resource list entries use the flags like this: IORESOURCE_UNSET This flag is no longer used in PNP. Instead of keeping IORESOURCE_UNSET entries in the resource list, we remove entries from the list and free them. IORESOURCE_AUTO No change in meaning: it still means the resource was assigned automatically by pnp_assign_{port,mem,etc}(), but these functions now set the bit explicitly. We still "clean" a device's resource list in the same places, but rather than reinitializing IORESOURCE_AUTO entries, we just remove them from the list. Note that IORESOURCE_AUTO entries are always at the end of the list, so removing them doesn't reorder other list entries. This is because non-IORESOURCE_AUTO entries are added by the ISAPNP, PNPBIOS, or PNPACPI "get resources" methods and by the sysfs "set" command. In each of these cases, we completely free the resource list first. IORESOURCE_DISABLED In addition to the cases where we used to set this flag, ISAPNP now adds an IORESOURCE_DISABLED resource when it reads a configuration register with a "disabled" value. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
2008-06-27 22:56:57 +00:00
pnp_res = kzalloc(sizeof(struct pnp_resource), GFP_KERNEL);
if (!pnp_res)
return NULL;
list_add_tail(&pnp_res->list, &dev->resources);
return pnp_res;
}
struct pnp_resource *pnp_add_irq_resource(struct pnp_dev *dev, int irq,
int flags)
{
struct pnp_resource *pnp_res;
struct resource *res;
PNP: replace pnp_resource_table with dynamically allocated resources PNP used to have a fixed-size pnp_resource_table for tracking the resources used by a device. This table often overflowed, so we've had to increase the table size, which wastes memory because most devices have very few resources. This patch replaces the table with a linked list of resources where the entries are allocated on demand. This removes messages like these: pnpacpi: exceeded the max number of IO resources 00:01: too many I/O port resources References: http://bugzilla.kernel.org/show_bug.cgi?id=9535 http://bugzilla.kernel.org/show_bug.cgi?id=9740 http://lkml.org/lkml/2007/11/30/110 This patch also changes the way PNP uses the IORESOURCE_UNSET, IORESOURCE_AUTO, and IORESOURCE_DISABLED flags. Prior to this patch, the pnp_resource_table entries used the flags like this: IORESOURCE_UNSET This table entry is unused and available for use. When this flag is set, we shouldn't look at anything else in the resource structure. This flag is set when a resource table entry is initialized. IORESOURCE_AUTO This resource was assigned automatically by pnp_assign_{io,mem,etc}(). This flag is set when a resource table entry is initialized and cleared whenever we discover a resource setting by reading an ISAPNP config register, parsing a PNPBIOS resource data stream, parsing an ACPI _CRS list, or interpreting a sysfs "set" command. Resources marked IORESOURCE_AUTO are reinitialized and marked as IORESOURCE_UNSET by pnp_clean_resource_table() in these cases: - before we attempt to assign resources automatically, - if we fail to assign resources automatically, - after disabling a device IORESOURCE_DISABLED Set by pnp_assign_{io,mem,etc}() when automatic assignment fails. Also set by PNPBIOS and PNPACPI for: - invalid IRQs or GSI registration failures - invalid DMA channels - I/O ports above 0x10000 - mem ranges with negative length After this patch, there is no pnp_resource_table, and the resource list entries use the flags like this: IORESOURCE_UNSET This flag is no longer used in PNP. Instead of keeping IORESOURCE_UNSET entries in the resource list, we remove entries from the list and free them. IORESOURCE_AUTO No change in meaning: it still means the resource was assigned automatically by pnp_assign_{port,mem,etc}(), but these functions now set the bit explicitly. We still "clean" a device's resource list in the same places, but rather than reinitializing IORESOURCE_AUTO entries, we just remove them from the list. Note that IORESOURCE_AUTO entries are always at the end of the list, so removing them doesn't reorder other list entries. This is because non-IORESOURCE_AUTO entries are added by the ISAPNP, PNPBIOS, or PNPACPI "get resources" methods and by the sysfs "set" command. In each of these cases, we completely free the resource list first. IORESOURCE_DISABLED In addition to the cases where we used to set this flag, ISAPNP now adds an IORESOURCE_DISABLED resource when it reads a configuration register with a "disabled" value. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
2008-06-27 22:56:57 +00:00
pnp_res = pnp_new_resource(dev);
if (!pnp_res) {
dev_err(&dev->dev, "can't add resource for IRQ %d\n", irq);
return NULL;
}
res = &pnp_res->res;
res->flags = IORESOURCE_IRQ | flags;
res->start = irq;
res->end = irq;
dev_dbg(&dev->dev, " add irq %d flags %#x\n", irq, flags);
return pnp_res;
}
struct pnp_resource *pnp_add_dma_resource(struct pnp_dev *dev, int dma,
int flags)
{
struct pnp_resource *pnp_res;
struct resource *res;
PNP: replace pnp_resource_table with dynamically allocated resources PNP used to have a fixed-size pnp_resource_table for tracking the resources used by a device. This table often overflowed, so we've had to increase the table size, which wastes memory because most devices have very few resources. This patch replaces the table with a linked list of resources where the entries are allocated on demand. This removes messages like these: pnpacpi: exceeded the max number of IO resources 00:01: too many I/O port resources References: http://bugzilla.kernel.org/show_bug.cgi?id=9535 http://bugzilla.kernel.org/show_bug.cgi?id=9740 http://lkml.org/lkml/2007/11/30/110 This patch also changes the way PNP uses the IORESOURCE_UNSET, IORESOURCE_AUTO, and IORESOURCE_DISABLED flags. Prior to this patch, the pnp_resource_table entries used the flags like this: IORESOURCE_UNSET This table entry is unused and available for use. When this flag is set, we shouldn't look at anything else in the resource structure. This flag is set when a resource table entry is initialized. IORESOURCE_AUTO This resource was assigned automatically by pnp_assign_{io,mem,etc}(). This flag is set when a resource table entry is initialized and cleared whenever we discover a resource setting by reading an ISAPNP config register, parsing a PNPBIOS resource data stream, parsing an ACPI _CRS list, or interpreting a sysfs "set" command. Resources marked IORESOURCE_AUTO are reinitialized and marked as IORESOURCE_UNSET by pnp_clean_resource_table() in these cases: - before we attempt to assign resources automatically, - if we fail to assign resources automatically, - after disabling a device IORESOURCE_DISABLED Set by pnp_assign_{io,mem,etc}() when automatic assignment fails. Also set by PNPBIOS and PNPACPI for: - invalid IRQs or GSI registration failures - invalid DMA channels - I/O ports above 0x10000 - mem ranges with negative length After this patch, there is no pnp_resource_table, and the resource list entries use the flags like this: IORESOURCE_UNSET This flag is no longer used in PNP. Instead of keeping IORESOURCE_UNSET entries in the resource list, we remove entries from the list and free them. IORESOURCE_AUTO No change in meaning: it still means the resource was assigned automatically by pnp_assign_{port,mem,etc}(), but these functions now set the bit explicitly. We still "clean" a device's resource list in the same places, but rather than reinitializing IORESOURCE_AUTO entries, we just remove them from the list. Note that IORESOURCE_AUTO entries are always at the end of the list, so removing them doesn't reorder other list entries. This is because non-IORESOURCE_AUTO entries are added by the ISAPNP, PNPBIOS, or PNPACPI "get resources" methods and by the sysfs "set" command. In each of these cases, we completely free the resource list first. IORESOURCE_DISABLED In addition to the cases where we used to set this flag, ISAPNP now adds an IORESOURCE_DISABLED resource when it reads a configuration register with a "disabled" value. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
2008-06-27 22:56:57 +00:00
pnp_res = pnp_new_resource(dev);
if (!pnp_res) {
dev_err(&dev->dev, "can't add resource for DMA %d\n", dma);
return NULL;
}
res = &pnp_res->res;
res->flags = IORESOURCE_DMA | flags;
res->start = dma;
res->end = dma;
dev_dbg(&dev->dev, " add dma %d flags %#x\n", dma, flags);
return pnp_res;
}
struct pnp_resource *pnp_add_io_resource(struct pnp_dev *dev,
resource_size_t start,
resource_size_t end, int flags)
{
struct pnp_resource *pnp_res;
struct resource *res;
PNP: replace pnp_resource_table with dynamically allocated resources PNP used to have a fixed-size pnp_resource_table for tracking the resources used by a device. This table often overflowed, so we've had to increase the table size, which wastes memory because most devices have very few resources. This patch replaces the table with a linked list of resources where the entries are allocated on demand. This removes messages like these: pnpacpi: exceeded the max number of IO resources 00:01: too many I/O port resources References: http://bugzilla.kernel.org/show_bug.cgi?id=9535 http://bugzilla.kernel.org/show_bug.cgi?id=9740 http://lkml.org/lkml/2007/11/30/110 This patch also changes the way PNP uses the IORESOURCE_UNSET, IORESOURCE_AUTO, and IORESOURCE_DISABLED flags. Prior to this patch, the pnp_resource_table entries used the flags like this: IORESOURCE_UNSET This table entry is unused and available for use. When this flag is set, we shouldn't look at anything else in the resource structure. This flag is set when a resource table entry is initialized. IORESOURCE_AUTO This resource was assigned automatically by pnp_assign_{io,mem,etc}(). This flag is set when a resource table entry is initialized and cleared whenever we discover a resource setting by reading an ISAPNP config register, parsing a PNPBIOS resource data stream, parsing an ACPI _CRS list, or interpreting a sysfs "set" command. Resources marked IORESOURCE_AUTO are reinitialized and marked as IORESOURCE_UNSET by pnp_clean_resource_table() in these cases: - before we attempt to assign resources automatically, - if we fail to assign resources automatically, - after disabling a device IORESOURCE_DISABLED Set by pnp_assign_{io,mem,etc}() when automatic assignment fails. Also set by PNPBIOS and PNPACPI for: - invalid IRQs or GSI registration failures - invalid DMA channels - I/O ports above 0x10000 - mem ranges with negative length After this patch, there is no pnp_resource_table, and the resource list entries use the flags like this: IORESOURCE_UNSET This flag is no longer used in PNP. Instead of keeping IORESOURCE_UNSET entries in the resource list, we remove entries from the list and free them. IORESOURCE_AUTO No change in meaning: it still means the resource was assigned automatically by pnp_assign_{port,mem,etc}(), but these functions now set the bit explicitly. We still "clean" a device's resource list in the same places, but rather than reinitializing IORESOURCE_AUTO entries, we just remove them from the list. Note that IORESOURCE_AUTO entries are always at the end of the list, so removing them doesn't reorder other list entries. This is because non-IORESOURCE_AUTO entries are added by the ISAPNP, PNPBIOS, or PNPACPI "get resources" methods and by the sysfs "set" command. In each of these cases, we completely free the resource list first. IORESOURCE_DISABLED In addition to the cases where we used to set this flag, ISAPNP now adds an IORESOURCE_DISABLED resource when it reads a configuration register with a "disabled" value. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
2008-06-27 22:56:57 +00:00
pnp_res = pnp_new_resource(dev);
if (!pnp_res) {
dev_err(&dev->dev, "can't add resource for IO %#llx-%#llx\n",
(unsigned long long) start,
(unsigned long long) end);
return NULL;
}
res = &pnp_res->res;
res->flags = IORESOURCE_IO | flags;
res->start = start;
res->end = end;
dev_dbg(&dev->dev, " add io %#llx-%#llx flags %#x\n",
(unsigned long long) start, (unsigned long long) end, flags);
return pnp_res;
}
struct pnp_resource *pnp_add_mem_resource(struct pnp_dev *dev,
resource_size_t start,
resource_size_t end, int flags)
{
struct pnp_resource *pnp_res;
struct resource *res;
PNP: replace pnp_resource_table with dynamically allocated resources PNP used to have a fixed-size pnp_resource_table for tracking the resources used by a device. This table often overflowed, so we've had to increase the table size, which wastes memory because most devices have very few resources. This patch replaces the table with a linked list of resources where the entries are allocated on demand. This removes messages like these: pnpacpi: exceeded the max number of IO resources 00:01: too many I/O port resources References: http://bugzilla.kernel.org/show_bug.cgi?id=9535 http://bugzilla.kernel.org/show_bug.cgi?id=9740 http://lkml.org/lkml/2007/11/30/110 This patch also changes the way PNP uses the IORESOURCE_UNSET, IORESOURCE_AUTO, and IORESOURCE_DISABLED flags. Prior to this patch, the pnp_resource_table entries used the flags like this: IORESOURCE_UNSET This table entry is unused and available for use. When this flag is set, we shouldn't look at anything else in the resource structure. This flag is set when a resource table entry is initialized. IORESOURCE_AUTO This resource was assigned automatically by pnp_assign_{io,mem,etc}(). This flag is set when a resource table entry is initialized and cleared whenever we discover a resource setting by reading an ISAPNP config register, parsing a PNPBIOS resource data stream, parsing an ACPI _CRS list, or interpreting a sysfs "set" command. Resources marked IORESOURCE_AUTO are reinitialized and marked as IORESOURCE_UNSET by pnp_clean_resource_table() in these cases: - before we attempt to assign resources automatically, - if we fail to assign resources automatically, - after disabling a device IORESOURCE_DISABLED Set by pnp_assign_{io,mem,etc}() when automatic assignment fails. Also set by PNPBIOS and PNPACPI for: - invalid IRQs or GSI registration failures - invalid DMA channels - I/O ports above 0x10000 - mem ranges with negative length After this patch, there is no pnp_resource_table, and the resource list entries use the flags like this: IORESOURCE_UNSET This flag is no longer used in PNP. Instead of keeping IORESOURCE_UNSET entries in the resource list, we remove entries from the list and free them. IORESOURCE_AUTO No change in meaning: it still means the resource was assigned automatically by pnp_assign_{port,mem,etc}(), but these functions now set the bit explicitly. We still "clean" a device's resource list in the same places, but rather than reinitializing IORESOURCE_AUTO entries, we just remove them from the list. Note that IORESOURCE_AUTO entries are always at the end of the list, so removing them doesn't reorder other list entries. This is because non-IORESOURCE_AUTO entries are added by the ISAPNP, PNPBIOS, or PNPACPI "get resources" methods and by the sysfs "set" command. In each of these cases, we completely free the resource list first. IORESOURCE_DISABLED In addition to the cases where we used to set this flag, ISAPNP now adds an IORESOURCE_DISABLED resource when it reads a configuration register with a "disabled" value. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
2008-06-27 22:56:57 +00:00
pnp_res = pnp_new_resource(dev);
if (!pnp_res) {
dev_err(&dev->dev, "can't add resource for MEM %#llx-%#llx\n",
(unsigned long long) start,
(unsigned long long) end);
return NULL;
}
res = &pnp_res->res;
res->flags = IORESOURCE_MEM | flags;
res->start = start;
res->end = end;
dev_dbg(&dev->dev, " add mem %#llx-%#llx flags %#x\n",
(unsigned long long) start, (unsigned long long) end, flags);
return pnp_res;
}
static int pnp_possible_option(struct pnp_option *option, int type,
resource_size_t start, resource_size_t size)
{
struct pnp_option *tmp;
struct pnp_port *port;
struct pnp_mem *mem;
struct pnp_irq *irq;
struct pnp_dma *dma;
if (!option)
return 0;
for (tmp = option; tmp; tmp = tmp->next) {
switch (type) {
case IORESOURCE_IO:
for (port = tmp->port; port; port = port->next) {
if (port->min == start && port->size == size)
return 1;
}
break;
case IORESOURCE_MEM:
for (mem = tmp->mem; mem; mem = mem->next) {
if (mem->min == start && mem->size == size)
return 1;
}
break;
case IORESOURCE_IRQ:
for (irq = tmp->irq; irq; irq = irq->next) {
if (start < PNP_IRQ_NR &&
test_bit(start, irq->map.bits))
return 1;
}
break;
case IORESOURCE_DMA:
for (dma = tmp->dma; dma; dma = dma->next) {
if (dma->map & (1 << start))
return 1;
}
break;
}
}
return 0;
}
/*
* Determine whether the specified resource is a possible configuration
* for this device.
*/
int pnp_possible_config(struct pnp_dev *dev, int type, resource_size_t start,
resource_size_t size)
{
if (pnp_possible_option(dev->independent, type, start, size))
return 1;
if (pnp_possible_option(dev->dependent, type, start, size))
return 1;
return 0;
}
EXPORT_SYMBOL(pnp_possible_config);
/* format is: pnp_reserve_irq=irq1[,irq2] .... */
static int __init pnp_setup_reserve_irq(char *str)
{
int i;
for (i = 0; i < 16; i++)
if (get_option(&str, &pnp_reserve_irq[i]) != 2)
break;
return 1;
}
__setup("pnp_reserve_irq=", pnp_setup_reserve_irq);
/* format is: pnp_reserve_dma=dma1[,dma2] .... */
static int __init pnp_setup_reserve_dma(char *str)
{
int i;
for (i = 0; i < 8; i++)
if (get_option(&str, &pnp_reserve_dma[i]) != 2)
break;
return 1;
}
__setup("pnp_reserve_dma=", pnp_setup_reserve_dma);
/* format is: pnp_reserve_io=io1,size1[,io2,size2] .... */
static int __init pnp_setup_reserve_io(char *str)
{
int i;
for (i = 0; i < 16; i++)
if (get_option(&str, &pnp_reserve_io[i]) != 2)
break;
return 1;
}
__setup("pnp_reserve_io=", pnp_setup_reserve_io);
/* format is: pnp_reserve_mem=mem1,size1[,mem2,size2] .... */
static int __init pnp_setup_reserve_mem(char *str)
{
int i;
for (i = 0; i < 16; i++)
if (get_option(&str, &pnp_reserve_mem[i]) != 2)
break;
return 1;
}
__setup("pnp_reserve_mem=", pnp_setup_reserve_mem);