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Commit b19a7275 authored by Dominik Brodowski's avatar Dominik Brodowski
Browse files

pcmcia: clarify alloc_io_space, move it to resource handlers 



Clean up the alloc_io_space() function by moving most of it to
the actual resource_ops. This allows for a bit less re-directions.
Future cleanups will follow, and will make up for the code
duplication currently present between rsrc_iodyn and rsrc_nonstatic
(which are hardly ever built at the same time anyway, therefore no
increase in built size).

Signed-off-by: default avatarDominik Brodowski <linux@dominikbrodowski.net>
parent 49b1153a

drivers/pcmcia/cs_internal.h

+5 −7
Original line number Diff line number Diff line
@@ -52,13 +52,11 @@ struct cis_cache_entry { 


struct pccard_resource_ops {

	int	(*validate_mem)		(struct pcmcia_socket *s);

	int	(*adjust_io_region)	(struct resource *res,

					 unsigned long r_start,

					 unsigned long r_end,

					 struct pcmcia_socket *s);

	struct resource* (*find_io)	(unsigned long base, int num,

					 unsigned long align,

					 struct pcmcia_socket *s);

	int	(*find_io)		(struct pcmcia_socket *s,

					 unsigned int attr,

					 unsigned int *base,

					 unsigned int num,

					 unsigned int align);

	struct resource* (*find_mem)	(unsigned long base, unsigned long num,

					 unsigned long align, int low,

					 struct pcmcia_socket *s);

drivers/pcmcia/pcmcia_resource.c

+6 −65
Original line number Diff line number Diff line
@@ -40,23 +40,6 @@ static int io_speed; 
module_param(io_speed, int, 0444);





static int pcmcia_adjust_io_region(struct resource *res, unsigned long start,

				   unsigned long end, struct pcmcia_socket *s)

{

	if (s->resource_ops->adjust_io_region)

		return s->resource_ops->adjust_io_region(res, start, end, s);

	return -ENOMEM;

}



static struct resource *pcmcia_find_io_region(unsigned long base, int num,

					      unsigned long align,

					      struct pcmcia_socket *s)

{

	if (s->resource_ops->find_io)

		return s->resource_ops->find_io(base, num, align, s);

	return NULL;

}



int pcmcia_validate_mem(struct pcmcia_socket *s)

{

	if (s->resource_ops->validate_mem)
@@ -82,8 +65,7 @@ struct resource *pcmcia_find_mem_region(u_long base, u_long num, u_long align, 
static int alloc_io_space(struct pcmcia_socket *s, u_int attr,

			  unsigned int *base, unsigned int num, u_int lines)

{

	int i;

	unsigned int try, align;

	unsigned int align;



	align = (*base) ? (lines ? 1<<lines : 0) : 1;

	if (align && (align < num)) {
@@ -100,50 +82,8 @@ static int alloc_io_space(struct pcmcia_socket *s, u_int attr, 
		       *base, align);

		align = 0;

	}

	if ((s->features & SS_CAP_STATIC_MAP) && s->io_offset) {

		*base = s->io_offset | (*base & 0x0fff);

		return 0;

	}

	/* Check for an already-allocated window that must conflict with

	 * what was asked for.  It is a hack because it does not catch all

	 * potential conflicts, just the most obvious ones.

	 */

	for (i = 0; i < MAX_IO_WIN; i++)

		if ((s->io[i].res) && *base &&

		    ((s->io[i].res->start & (align-1)) == *base))

			return 1;

	for (i = 0; i < MAX_IO_WIN; i++) {

		if (!s->io[i].res) {

			s->io[i].res = pcmcia_find_io_region(*base, num, align, s);

			if (s->io[i].res) {

				*base = s->io[i].res->start;

				s->io[i].res->flags = (s->io[i].res->flags & ~IORESOURCE_BITS) | (attr & IORESOURCE_BITS);

				s->io[i].InUse = num;

				break;

			} else

				return 1;

		} else if ((s->io[i].res->flags & IORESOURCE_BITS) != (attr & IORESOURCE_BITS))

			continue;

		/* Try to extend top of window */

		try = s->io[i].res->end + 1;

		if ((*base == 0) || (*base == try))

			if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start,

						    s->io[i].res->end + num, s) == 0) {

				*base = try;

				s->io[i].InUse += num;

				break;

			}

		/* Try to extend bottom of window */

		try = s->io[i].res->start - num;

		if ((*base == 0) || (*base == try))

			if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start - num,

						    s->io[i].res->end, s) == 0) {

				*base = try;

				s->io[i].InUse += num;

				break;

			}

	}

	return (i == MAX_IO_WIN);



	return s->resource_ops->find_io(s, attr, base, num, align);

} /* alloc_io_space */
@@ -683,7 +623,8 @@ EXPORT_SYMBOL(pcmcia_request_irq); 
 * free_irq themselves, too), or the pcmcia_request_irq() function.

 */

int __must_check

pcmcia_request_exclusive_irq(struct pcmcia_device *p_dev, irq_handler_t handler)

__pcmcia_request_exclusive_irq(struct pcmcia_device *p_dev,

			irq_handler_t handler)

{

	int ret;
@@ -705,7 +646,7 @@ pcmcia_request_exclusive_irq(struct pcmcia_device *p_dev, irq_handler_t handler) 


	return ret;

} /* pcmcia_request_exclusive_irq */

EXPORT_SYMBOL(pcmcia_request_exclusive_irq);

EXPORT_SYMBOL(__pcmcia_request_exclusive_irq);





#ifdef CONFIG_PCMCIA_PROBE

drivers/pcmcia/rsrc_iodyn.c

+78 −14
Original line number Diff line number Diff line
@@ -56,15 +56,9 @@ static resource_size_t pcmcia_align(void *align_data, 
}





static int iodyn_adjust_io_region(struct resource *res, unsigned long r_start,

		unsigned long r_end, struct pcmcia_socket *s)

{

	return adjust_resource(res, r_start, r_end - r_start + 1);

}





static struct resource *iodyn_find_io_region(unsigned long base, int num,

		unsigned long align, struct pcmcia_socket *s)

static struct resource *__iodyn_find_io_region(struct pcmcia_socket *s,

					unsigned long base, int num,

					unsigned long align)

{

	struct resource *res = pcmcia_make_resource(0, num, IORESOURCE_IO,

						dev_name(&s->dev));
@@ -72,9 +66,6 @@ static struct resource *iodyn_find_io_region(unsigned long base, int num, 
	unsigned long min = base;

	int ret;



	if (align == 0)

		align = 0x10000;



	data.mask = align - 1;

	data.offset = base & data.mask;
@@ -94,10 +85,83 @@ static struct resource *iodyn_find_io_region(unsigned long base, int num, 
	return res;

}



static int iodyn_find_io(struct pcmcia_socket *s, unsigned int attr,

			unsigned int *base, unsigned int num,

			unsigned int align)

{

	int i, ret = 0;



	/* Check for an already-allocated window that must conflict with

	 * what was asked for.  It is a hack because it does not catch all

	 * potential conflicts, just the most obvious ones.

	 */

	for (i = 0; i < MAX_IO_WIN; i++) {

		if (!s->io[i].res)

			continue;



		if (!*base)

			continue;



		if ((s->io[i].res->start & (align-1)) == *base)

			return -EBUSY;

	}



	for (i = 0; i < MAX_IO_WIN; i++) {

		struct resource *res = s->io[i].res;

		unsigned int try;



		if (res && (res->flags & IORESOURCE_BITS) !=

			(attr & IORESOURCE_BITS))

			continue;



		if (!res) {

			if (align == 0)

				align = 0x10000;



			res = s->io[i].res = __iodyn_find_io_region(s, *base,

								num, align);

			if (!res)

				return -EINVAL;



			*base = res->start;

			s->io[i].res->flags =

				((res->flags & ~IORESOURCE_BITS) |

					(attr & IORESOURCE_BITS));

			s->io[i].InUse = num;

			return 0;

		}



		/* Try to extend top of window */

		try = res->end + 1;

		if ((*base == 0) || (*base == try)) {

			if (adjust_resource(s->io[i].res, res->start,

					res->end - res->start + num + 1))

				continue;

			*base = try;

			s->io[i].InUse += num;

			return 0;

		}



		/* Try to extend bottom of window */

		try = res->start - num;

		if ((*base == 0) || (*base == try)) {

			if (adjust_resource(s->io[i].res,

					res->start - num,

					res->end - res->start + num + 1))

				continue;

			*base = try;

			s->io[i].InUse += num;

			return 0;

		}

	}



	return -EINVAL;

}





struct pccard_resource_ops pccard_iodyn_ops = {

	.validate_mem = NULL,

	.adjust_io_region = iodyn_adjust_io_region,

	.find_io = iodyn_find_io_region,

	.find_io = iodyn_find_io,

	.find_mem = NULL,

	.add_io = NULL,

	.add_mem = NULL,

drivers/pcmcia/rsrc_mgr.c

+12 −2
Original line number Diff line number Diff line
@@ -46,11 +46,21 @@ struct resource *pcmcia_make_resource(unsigned long start, unsigned long end, 
	return res;

}



static int static_find_io(struct pcmcia_socket *s, unsigned int attr,

			unsigned int *base, unsigned int num,

			unsigned int align)

{

	if (!s->io_offset)

		return -EINVAL;

	*base = s->io_offset | (*base & 0x0fff);



	return 0;

}





struct pccard_resource_ops pccard_static_ops = {

	.validate_mem = NULL,

	.adjust_io_region = NULL,

	.find_io = NULL,

	.find_io = static_find_io,

	.find_mem = NULL,

	.add_io = NULL,

	.add_mem = NULL,

drivers/pcmcia/rsrc_nonstatic.c

+94 −11
Original line number Diff line number Diff line
@@ -649,8 +649,9 @@ pcmcia_align(void *align_data, const struct resource *res, 
 * Adjust an existing IO region allocation, but making sure that we don't

 * encroach outside the resources which the user supplied.

 */

static int nonstatic_adjust_io_region(struct resource *res, unsigned long r_start,

				      unsigned long r_end, struct pcmcia_socket *s)

static int __nonstatic_adjust_io_region(struct pcmcia_socket *s,

					unsigned long r_start,

					unsigned long r_end)

{

	struct resource_map *m;

	struct socket_data *s_data = s->resource_data;
@@ -663,8 +664,7 @@ static int nonstatic_adjust_io_region(struct resource *res, unsigned long r_star 
		if (start > r_start || r_end > end)

			continue;



		ret = adjust_resource(res, r_start, r_end - r_start + 1);

		break;

		ret = 0;

	}



	return ret;
@@ -683,8 +683,9 @@ static int nonstatic_adjust_io_region(struct resource *res, unsigned long r_star 


======================================================================*/



static struct resource *nonstatic_find_io_region(unsigned long base, int num,

		   unsigned long align, struct pcmcia_socket *s)

static struct resource *__nonstatic_find_io_region(struct pcmcia_socket *s,

						unsigned long base, int num,

						unsigned long align)

{

	struct resource *res = pcmcia_make_resource(0, num, IORESOURCE_IO,

						dev_name(&s->dev));
@@ -693,9 +694,6 @@ static struct resource *nonstatic_find_io_region(unsigned long base, int num, 
	unsigned long min = base;

	int ret;



	if (align == 0)

		align = 0x10000;



	data.mask = align - 1;

	data.offset = base & data.mask;

	data.map = &s_data->io_db;
@@ -716,6 +714,92 @@ static struct resource *nonstatic_find_io_region(unsigned long base, int num, 
	return res;

}



static int nonstatic_find_io(struct pcmcia_socket *s, unsigned int attr,

			unsigned int *base, unsigned int num,

			unsigned int align)

{

	int i, ret = 0;



	/* Check for an already-allocated window that must conflict with

	 * what was asked for.  It is a hack because it does not catch all

	 * potential conflicts, just the most obvious ones.

	 */

	for (i = 0; i < MAX_IO_WIN; i++) {

		if (!s->io[i].res)

			continue;



		if (!*base)

			continue;



		if ((s->io[i].res->start & (align-1)) == *base)

			return -EBUSY;

	}



	for (i = 0; i < MAX_IO_WIN; i++) {

		struct resource *res = s->io[i].res;

		unsigned int try;



		if (res && (res->flags & IORESOURCE_BITS) !=

			(attr & IORESOURCE_BITS))

			continue;



		if (!res) {

			if (align == 0)

				align = 0x10000;



			res = s->io[i].res = __nonstatic_find_io_region(s,

								*base, num,

								align);

			if (!res)

				return -EINVAL;



			*base = res->start;

			s->io[i].res->flags =

				((res->flags & ~IORESOURCE_BITS) |

					(attr & IORESOURCE_BITS));

			s->io[i].InUse = num;

			return 0;

		}



		/* Try to extend top of window */

		try = res->end + 1;

		if ((*base == 0) || (*base == try)) {

			ret =  __nonstatic_adjust_io_region(s, res->start,

							res->end + num);

			if (!ret) {

				ret = adjust_resource(s->io[i].res, res->start,

					       res->end - res->start + num + 1);

				if (ret)

					continue;

				*base = try;

				s->io[i].InUse += num;

				return 0;

			}

		}



		/* Try to extend bottom of window */

		try = res->start - num;

		if ((*base == 0) || (*base == try)) {

			ret =  __nonstatic_adjust_io_region(s,

							res->start - num,

							res->end);

			if (!ret) {

				ret = adjust_resource(s->io[i].res,

					       res->start - num,

					       res->end - res->start + num + 1);

				if (ret)

					continue;

				*base = try;

				s->io[i].InUse += num;

				return 0;

			}

		}

	}



	return -EINVAL;

}





static struct resource *nonstatic_find_mem_region(u_long base, u_long num,

		u_long align, int low, struct pcmcia_socket *s)

{
@@ -946,8 +1030,7 @@ static void nonstatic_release_resource_db(struct pcmcia_socket *s) 


struct pccard_resource_ops pccard_nonstatic_ops = {

	.validate_mem = pcmcia_nonstatic_validate_mem,

	.adjust_io_region = nonstatic_adjust_io_region,

	.find_io = nonstatic_find_io_region,

	.find_io = nonstatic_find_io,

	.find_mem = nonstatic_find_mem_region,

	.add_io = adjust_io,

	.add_mem = adjust_memory,