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alistair23-linux/drivers/pnp/pnpbios/rsparser.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

810 lines
17 KiB
C
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/*
* rsparser.c - parses and encodes pnpbios resource data streams
*/
#include <linux/ctype.h>
#include <linux/pnp.h>
#include <linux/string.h>
#ifdef CONFIG_PCI
#include <linux/pci.h>
#else
inline void pcibios_penalize_isa_irq(int irq, int active)
{
}
#endif /* CONFIG_PCI */
#include "../base.h"
#include "pnpbios.h"
/* standard resource tags */
#define SMALL_TAG_PNPVERNO 0x01
#define SMALL_TAG_LOGDEVID 0x02
#define SMALL_TAG_COMPATDEVID 0x03
#define SMALL_TAG_IRQ 0x04
#define SMALL_TAG_DMA 0x05
#define SMALL_TAG_STARTDEP 0x06
#define SMALL_TAG_ENDDEP 0x07
#define SMALL_TAG_PORT 0x08
#define SMALL_TAG_FIXEDPORT 0x09
#define SMALL_TAG_VENDOR 0x0e
#define SMALL_TAG_END 0x0f
#define LARGE_TAG 0x80
#define LARGE_TAG_MEM 0x81
#define LARGE_TAG_ANSISTR 0x82
#define LARGE_TAG_UNICODESTR 0x83
#define LARGE_TAG_VENDOR 0x84
#define LARGE_TAG_MEM32 0x85
#define LARGE_TAG_FIXEDMEM32 0x86
/*
* Resource Data Stream Format:
*
* Allocated Resources (required)
* end tag ->
* Resource Configuration Options (optional)
* end tag ->
* Compitable Device IDs (optional)
* final end tag ->
*/
/*
* Allocated Resources
*/
static void pnpbios_parse_allocated_ioresource(struct pnp_dev *dev,
int start, int len)
{
int flags = 0;
int end = start + len - 1;
if (len <= 0 || end >= 0x10003)
flags |= IORESOURCE_DISABLED;
pnp_add_io_resource(dev, start, end, flags);
}
static void pnpbios_parse_allocated_memresource(struct pnp_dev *dev,
int start, int len)
{
int flags = 0;
int end = start + len - 1;
if (len <= 0)
flags |= IORESOURCE_DISABLED;
pnp_add_mem_resource(dev, start, end, flags);
}
static unsigned char *pnpbios_parse_allocated_resource_data(struct pnp_dev *dev,
unsigned char *p,
unsigned char *end)
{
unsigned int len, tag;
int io, size, mask, i, flags;
if (!p)
return NULL;
pnp_dbg(&dev->dev, "parse allocated resources\n");
pnp_init_resources(dev);
while ((char *)p < (char *)end) {
/* determine the type of tag */
if (p[0] & LARGE_TAG) { /* large tag */
len = (p[2] << 8) | p[1];
tag = p[0];
} else { /* small tag */
len = p[0] & 0x07;
tag = ((p[0] >> 3) & 0x0f);
}
switch (tag) {
case LARGE_TAG_MEM:
if (len != 9)
goto len_err;
io = *(short *)&p[4];
size = *(short *)&p[10];
pnpbios_parse_allocated_memresource(dev, io, size);
break;
case LARGE_TAG_ANSISTR:
/* ignore this for now */
break;
case LARGE_TAG_VENDOR:
/* do nothing */
break;
case LARGE_TAG_MEM32:
if (len != 17)
goto len_err;
io = *(int *)&p[4];
size = *(int *)&p[16];
pnpbios_parse_allocated_memresource(dev, io, size);
break;
case LARGE_TAG_FIXEDMEM32:
if (len != 9)
goto len_err;
io = *(int *)&p[4];
size = *(int *)&p[8];
pnpbios_parse_allocated_memresource(dev, io, size);
break;
case SMALL_TAG_IRQ:
if (len < 2 || len > 3)
goto len_err;
flags = 0;
io = -1;
mask = p[1] + p[2] * 256;
for (i = 0; i < 16; i++, mask = mask >> 1)
if (mask & 0x01)
io = i;
if (io != -1)
pcibios_penalize_isa_irq(io, 1);
else
flags = IORESOURCE_DISABLED;
pnp_add_irq_resource(dev, io, flags);
break;
case SMALL_TAG_DMA:
if (len != 2)
goto len_err;
flags = 0;
io = -1;
mask = p[1];
for (i = 0; i < 8; i++, mask = mask >> 1)
if (mask & 0x01)
io = i;
if (io == -1)
flags = IORESOURCE_DISABLED;
pnp_add_dma_resource(dev, io, flags);
break;
case SMALL_TAG_PORT:
if (len != 7)
goto len_err;
io = p[2] + p[3] * 256;
size = p[7];
pnpbios_parse_allocated_ioresource(dev, io, size);
break;
case SMALL_TAG_VENDOR:
/* do nothing */
break;
case SMALL_TAG_FIXEDPORT:
if (len != 3)
goto len_err;
io = p[1] + p[2] * 256;
size = p[3];
pnpbios_parse_allocated_ioresource(dev, io, size);
break;
case SMALL_TAG_END:
p = p + 2;
return (unsigned char *)p;
break;
default: /* an unknown tag */
len_err:
dev_err(&dev->dev, "unknown tag %#x length %d\n",
tag, len);
break;
}
/* continue to the next tag */
if (p[0] & LARGE_TAG)
p += len + 3;
else
p += len + 1;
}
dev_err(&dev->dev, "no end tag in resource structure\n");
return NULL;
}
/*
* Resource Configuration Options
*/
static __init void pnpbios_parse_mem_option(struct pnp_dev *dev,
unsigned char *p, int size,
unsigned int option_flags)
{
resource_size_t min, max, align, len;
unsigned char flags;
min = ((p[5] << 8) | p[4]) << 8;
max = ((p[7] << 8) | p[6]) << 8;
align = (p[9] << 8) | p[8];
len = ((p[11] << 8) | p[10]) << 8;
flags = p[3];
pnp_register_mem_resource(dev, option_flags, min, max, align, len,
flags);
}
static __init void pnpbios_parse_mem32_option(struct pnp_dev *dev,
unsigned char *p, int size,
unsigned int option_flags)
{
resource_size_t min, max, align, len;
unsigned char flags;
min = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4];
max = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8];
align = (p[15] << 24) | (p[14] << 16) | (p[13] << 8) | p[12];
len = (p[19] << 24) | (p[18] << 16) | (p[17] << 8) | p[16];
flags = p[3];
pnp_register_mem_resource(dev, option_flags, min, max, align, len,
flags);
}
static __init void pnpbios_parse_fixed_mem32_option(struct pnp_dev *dev,
unsigned char *p, int size,
unsigned int option_flags)
{
resource_size_t base, len;
unsigned char flags;
base = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4];
len = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8];
flags = p[3];
pnp_register_mem_resource(dev, option_flags, base, base, 0, len, flags);
}
static __init void pnpbios_parse_irq_option(struct pnp_dev *dev,
unsigned char *p, int size,
unsigned int option_flags)
{
unsigned long bits;
pnp_irq_mask_t map;
unsigned char flags = IORESOURCE_IRQ_HIGHEDGE;
bits = (p[2] << 8) | p[1];
bitmap_zero(map.bits, PNP_IRQ_NR);
bitmap_copy(map.bits, &bits, 16);
if (size > 2)
flags = p[3];
pnp_register_irq_resource(dev, option_flags, &map, flags);
}
static __init void pnpbios_parse_dma_option(struct pnp_dev *dev,
unsigned char *p, int size,
unsigned int option_flags)
{
pnp_register_dma_resource(dev, option_flags, p[1], p[2]);
}
static __init void pnpbios_parse_port_option(struct pnp_dev *dev,
unsigned char *p, int size,
unsigned int option_flags)
{
resource_size_t min, max, align, len;
unsigned char flags;
min = (p[3] << 8) | p[2];
max = (p[5] << 8) | p[4];
align = p[6];
len = p[7];
flags = p[1] ? IORESOURCE_IO_16BIT_ADDR : 0;
pnp_register_port_resource(dev, option_flags, min, max, align, len,
flags);
}
static __init void pnpbios_parse_fixed_port_option(struct pnp_dev *dev,
unsigned char *p, int size,
unsigned int option_flags)
{
resource_size_t base, len;
base = (p[2] << 8) | p[1];
len = p[3];
pnp_register_port_resource(dev, option_flags, base, base, 0, len,
IORESOURCE_IO_FIXED);
}
static __init unsigned char *
pnpbios_parse_resource_option_data(unsigned char *p, unsigned char *end,
struct pnp_dev *dev)
{
unsigned int len, tag;
int priority;
unsigned int option_flags;
if (!p)
return NULL;
pnp_dbg(&dev->dev, "parse resource options\n");
option_flags = 0;
while ((char *)p < (char *)end) {
/* determine the type of tag */
if (p[0] & LARGE_TAG) { /* large tag */
len = (p[2] << 8) | p[1];
tag = p[0];
} else { /* small tag */
len = p[0] & 0x07;
tag = ((p[0] >> 3) & 0x0f);
}
switch (tag) {
case LARGE_TAG_MEM:
if (len != 9)
goto len_err;
pnpbios_parse_mem_option(dev, p, len, option_flags);
break;
case LARGE_TAG_MEM32:
if (len != 17)
goto len_err;
pnpbios_parse_mem32_option(dev, p, len, option_flags);
break;
case LARGE_TAG_FIXEDMEM32:
if (len != 9)
goto len_err;
pnpbios_parse_fixed_mem32_option(dev, p, len,
option_flags);
break;
case SMALL_TAG_IRQ:
if (len < 2 || len > 3)
goto len_err;
pnpbios_parse_irq_option(dev, p, len, option_flags);
break;
case SMALL_TAG_DMA:
if (len != 2)
goto len_err;
pnpbios_parse_dma_option(dev, p, len, option_flags);
break;
case SMALL_TAG_PORT:
if (len != 7)
goto len_err;
pnpbios_parse_port_option(dev, p, len, option_flags);
break;
case SMALL_TAG_VENDOR:
/* do nothing */
break;
case SMALL_TAG_FIXEDPORT:
if (len != 3)
goto len_err;
pnpbios_parse_fixed_port_option(dev, p, len,
option_flags);
break;
case SMALL_TAG_STARTDEP:
if (len > 1)
goto len_err;
priority = PNP_RES_PRIORITY_ACCEPTABLE;
if (len > 0)
priority = p[1];
option_flags = pnp_new_dependent_set(dev, priority);
break;
case SMALL_TAG_ENDDEP:
if (len != 0)
goto len_err;
option_flags = 0;
break;
case SMALL_TAG_END:
return p + 2;
default: /* an unknown tag */
len_err:
dev_err(&dev->dev, "unknown tag %#x length %d\n",
tag, len);
break;
}
/* continue to the next tag */
if (p[0] & LARGE_TAG)
p += len + 3;
else
p += len + 1;
}
dev_err(&dev->dev, "no end tag in resource structure\n");
return NULL;
}
/*
* Compatible Device IDs
*/
static unsigned char *pnpbios_parse_compatible_ids(unsigned char *p,
unsigned char *end,
struct pnp_dev *dev)
{
int len, tag;
u32 eisa_id;
char id[8];
struct pnp_id *dev_id;
if (!p)
return NULL;
while ((char *)p < (char *)end) {
/* determine the type of tag */
if (p[0] & LARGE_TAG) { /* large tag */
len = (p[2] << 8) | p[1];
tag = p[0];
} else { /* small tag */
len = p[0] & 0x07;
tag = ((p[0] >> 3) & 0x0f);
}
switch (tag) {
case LARGE_TAG_ANSISTR:
strncpy(dev->name, p + 3,
len >= PNP_NAME_LEN ? PNP_NAME_LEN - 2 : len);
dev->name[len >=
PNP_NAME_LEN ? PNP_NAME_LEN - 1 : len] = '\0';
break;
case SMALL_TAG_COMPATDEVID: /* compatible ID */
if (len != 4)
goto len_err;
eisa_id = p[1] | p[2] << 8 | p[3] << 16 | p[4] << 24;
pnp_eisa_id_to_string(eisa_id & PNP_EISA_ID_MASK, id);
dev_id = pnp_add_id(dev, id);
if (!dev_id)
return NULL;
break;
case SMALL_TAG_END:
p = p + 2;
return (unsigned char *)p;
break;
default: /* an unknown tag */
len_err:
dev_err(&dev->dev, "unknown tag %#x length %d\n",
tag, len);
break;
}
/* continue to the next tag */
if (p[0] & LARGE_TAG)
p += len + 3;
else
p += len + 1;
}
dev_err(&dev->dev, "no end tag in resource structure\n");
return NULL;
}
/*
* Allocated Resource Encoding
*/
static void pnpbios_encode_mem(struct pnp_dev *dev, unsigned char *p,
struct resource *res)
{
unsigned long base;
unsigned long len;
if (pnp_resource_enabled(res)) {
base = res->start;
len = res->end - res->start + 1;
} else {
base = 0;
len = 0;
}
p[4] = (base >> 8) & 0xff;
p[5] = ((base >> 8) >> 8) & 0xff;
p[6] = (base >> 8) & 0xff;
p[7] = ((base >> 8) >> 8) & 0xff;
p[10] = (len >> 8) & 0xff;
p[11] = ((len >> 8) >> 8) & 0xff;
pnp_dbg(&dev->dev, " encode mem %#lx-%#lx\n", base, base + len - 1);
}
static void pnpbios_encode_mem32(struct pnp_dev *dev, unsigned char *p,
struct resource *res)
{
unsigned long base;
unsigned long len;
if (pnp_resource_enabled(res)) {
base = res->start;
len = res->end - res->start + 1;
} else {
base = 0;
len = 0;
}
p[4] = base & 0xff;
p[5] = (base >> 8) & 0xff;
p[6] = (base >> 16) & 0xff;
p[7] = (base >> 24) & 0xff;
p[8] = base & 0xff;
p[9] = (base >> 8) & 0xff;
p[10] = (base >> 16) & 0xff;
p[11] = (base >> 24) & 0xff;
p[16] = len & 0xff;
p[17] = (len >> 8) & 0xff;
p[18] = (len >> 16) & 0xff;
p[19] = (len >> 24) & 0xff;
pnp_dbg(&dev->dev, " encode mem32 %#lx-%#lx\n", base, base + len - 1);
}
static void pnpbios_encode_fixed_mem32(struct pnp_dev *dev, unsigned char *p,
struct resource *res)
{
unsigned long base;
unsigned long len;
if (pnp_resource_enabled(res)) {
base = res->start;
len = res->end - res->start + 1;
} else {
base = 0;
len = 0;
}
p[4] = base & 0xff;
p[5] = (base >> 8) & 0xff;
p[6] = (base >> 16) & 0xff;
p[7] = (base >> 24) & 0xff;
p[8] = len & 0xff;
p[9] = (len >> 8) & 0xff;
p[10] = (len >> 16) & 0xff;
p[11] = (len >> 24) & 0xff;
pnp_dbg(&dev->dev, " encode fixed_mem32 %#lx-%#lx\n", base,
base + len - 1);
}
static void pnpbios_encode_irq(struct pnp_dev *dev, unsigned char *p,
struct resource *res)
{
unsigned long map;
if (pnp_resource_enabled(res))
map = 1 << res->start;
else
map = 0;
p[1] = map & 0xff;
p[2] = (map >> 8) & 0xff;
pnp_dbg(&dev->dev, " encode irq mask %#lx\n", map);
}
static void pnpbios_encode_dma(struct pnp_dev *dev, unsigned char *p,
struct resource *res)
{
unsigned long map;
if (pnp_resource_enabled(res))
map = 1 << res->start;
else
map = 0;
p[1] = map & 0xff;
pnp_dbg(&dev->dev, " encode dma mask %#lx\n", map);
}
static void pnpbios_encode_port(struct pnp_dev *dev, unsigned char *p,
struct resource *res)
{
unsigned long base;
unsigned long len;
if (pnp_resource_enabled(res)) {
base = res->start;
len = res->end - res->start + 1;
} else {
base = 0;
len = 0;
}
p[2] = base & 0xff;
p[3] = (base >> 8) & 0xff;
p[4] = base & 0xff;
p[5] = (base >> 8) & 0xff;
p[7] = len & 0xff;
pnp_dbg(&dev->dev, " encode io %#lx-%#lx\n", base, base + len - 1);
}
static void pnpbios_encode_fixed_port(struct pnp_dev *dev, unsigned char *p,
struct resource *res)
{
unsigned long base = res->start;
unsigned long len = res->end - res->start + 1;
if (pnp_resource_enabled(res)) {
base = res->start;
len = res->end - res->start + 1;
} else {
base = 0;
len = 0;
}
p[1] = base & 0xff;
p[2] = (base >> 8) & 0xff;
p[3] = len & 0xff;
pnp_dbg(&dev->dev, " encode fixed_io %#lx-%#lx\n", base,
base + len - 1);
}
static unsigned char *pnpbios_encode_allocated_resource_data(struct pnp_dev
*dev,
unsigned char *p,
unsigned char *end)
{
unsigned int len, tag;
int port = 0, irq = 0, dma = 0, mem = 0;
if (!p)
return NULL;
while ((char *)p < (char *)end) {
/* determine the type of tag */
if (p[0] & LARGE_TAG) { /* large tag */
len = (p[2] << 8) | p[1];
tag = p[0];
} else { /* small tag */
len = p[0] & 0x07;
tag = ((p[0] >> 3) & 0x0f);
}
switch (tag) {
case LARGE_TAG_MEM:
if (len != 9)
goto len_err;
pnpbios_encode_mem(dev, p,
pnp_get_resource(dev, IORESOURCE_MEM, mem));
mem++;
break;
case LARGE_TAG_MEM32:
if (len != 17)
goto len_err;
pnpbios_encode_mem32(dev, p,
pnp_get_resource(dev, IORESOURCE_MEM, mem));
mem++;
break;
case LARGE_TAG_FIXEDMEM32:
if (len != 9)
goto len_err;
pnpbios_encode_fixed_mem32(dev, p,
pnp_get_resource(dev, IORESOURCE_MEM, mem));
mem++;
break;
case SMALL_TAG_IRQ:
if (len < 2 || len > 3)
goto len_err;
pnpbios_encode_irq(dev, p,
pnp_get_resource(dev, IORESOURCE_IRQ, irq));
irq++;
break;
case SMALL_TAG_DMA:
if (len != 2)
goto len_err;
pnpbios_encode_dma(dev, p,
pnp_get_resource(dev, IORESOURCE_DMA, dma));
dma++;
break;
case SMALL_TAG_PORT:
if (len != 7)
goto len_err;
pnpbios_encode_port(dev, p,
pnp_get_resource(dev, IORESOURCE_IO, port));
port++;
break;
case SMALL_TAG_VENDOR:
/* do nothing */
break;
case SMALL_TAG_FIXEDPORT:
if (len != 3)
goto len_err;
pnpbios_encode_fixed_port(dev, p,
pnp_get_resource(dev, IORESOURCE_IO, port));
port++;
break;
case SMALL_TAG_END:
p = p + 2;
return (unsigned char *)p;
break;
default: /* an unknown tag */
len_err:
dev_err(&dev->dev, "unknown tag %#x length %d\n",
tag, len);
break;
}
/* continue to the next tag */
if (p[0] & LARGE_TAG)
p += len + 3;
else
p += len + 1;
}
dev_err(&dev->dev, "no end tag in resource structure\n");
return NULL;
}
/*
* Core Parsing Functions
*/
int __init pnpbios_parse_data_stream(struct pnp_dev *dev,
struct pnp_bios_node *node)
{
unsigned char *p = (char *)node->data;
unsigned char *end = (char *)(node->data + node->size);
p = pnpbios_parse_allocated_resource_data(dev, p, end);
if (!p)
return -EIO;
p = pnpbios_parse_resource_option_data(p, end, dev);
if (!p)
return -EIO;
p = pnpbios_parse_compatible_ids(p, end, dev);
if (!p)
return -EIO;
return 0;
}
int pnpbios_read_resources_from_node(struct pnp_dev *dev,
struct pnp_bios_node *node)
{
unsigned char *p = (char *)node->data;
unsigned char *end = (char *)(node->data + node->size);
p = pnpbios_parse_allocated_resource_data(dev, p, end);
if (!p)
return -EIO;
return 0;
}
int pnpbios_write_resources_to_node(struct pnp_dev *dev,
struct pnp_bios_node *node)
{
unsigned char *p = (char *)node->data;
unsigned char *end = (char *)(node->data + node->size);
p = pnpbios_encode_allocated_resource_data(dev, p, end);
if (!p)
return -EIO;
return 0;
}
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