[linux-2.6-block.git] / drivers / pcmcia / rsrc_pci.c

#include <linux/slab.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/pci.h>

#include <pcmcia/ss.h>
#include <pcmcia/cistpl.h>
#include "cs_internal.h"


struct pcmcia_align_data {
	unsigned long	mask;
	unsigned long	offset;
};

static resource_size_t pcmcia_align(void *align_data,
				const struct resource *res,
				resource_size_t size, resource_size_t align)
{
	struct pcmcia_align_data *data = align_data;
	resource_size_t start;

	start = (res->start & ~data->mask) + data->offset;
	if (start < res->start)
		start += data->mask + 1;
	return start;
}

static struct resource *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));
	struct pcmcia_align_data data;
	int ret;

	data.mask = align - 1;
	data.offset = base & data.mask;

	ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, 1,
					     base, 0, pcmcia_align, &data);
	if (ret != 0) {
		kfree(res);
		res = NULL;
	}
	return res;
}

static int res_pci_find_io(struct pcmcia_socket *s, unsigned int attr,
			unsigned int *base, unsigned int num,
			unsigned int align, struct resource **parent)
{
	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 = 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;
			*parent = res;
			return 0;
		}

		/* Try to extend top of window */
		try = res->end + 1;
		if ((*base == 0) || (*base == try)) {
			ret = adjust_resource(s->io[i].res, res->start,
					      resource_size(res) + num);
			if (ret)
				continue;
			*base = try;
			s->io[i].InUse += num;
			*parent = res;
			return 0;
		}

		/* Try to extend bottom of window */
		try = res->start - num;
		if ((*base == 0) || (*base == try)) {
			ret = adjust_resource(s->io[i].res,
					      res->start - num,
					      resource_size(res) + num);
			if (ret)
				continue;
			*base = try;
			s->io[i].InUse += num;
			*parent = res;
			return 0;
		}
	}
	return -EINVAL;
}

static struct resource *res_pci_find_mem(u_long base, u_long num,
		u_long align, int low, struct pcmcia_socket *s)
{
	struct resource *res = pcmcia_make_resource(0, num, IORESOURCE_MEM,
						dev_name(&s->dev));
	struct pcmcia_align_data data;
	unsigned long min;
	int ret;

	if (align < 0x20000)
		align = 0x20000;
	data.mask = align - 1;
	data.offset = base & data.mask;

	min = 0;
	if (!low)
		min = 0x100000UL;

	ret = pci_bus_alloc_resource(s->cb_dev->bus,
			res, num, 1, min, 0,
			pcmcia_align, &data);

	if (ret != 0) {
		kfree(res);
		res = NULL;
	}
	return res;
}


static int res_pci_init(struct pcmcia_socket *s)
{
	if (!s->cb_dev || (!s->features & SS_CAP_PAGE_REGS)) {
		dev_err(&s->dev, "not supported by res_pci\n");
		return -EOPNOTSUPP;
	}
	return 0;
}

struct pccard_resource_ops pccard_nonstatic_ops = {
	.validate_mem = NULL,
	.find_io = res_pci_find_io,
	.find_mem = res_pci_find_mem,
	.init = res_pci_init,
	.exit = NULL,
};
EXPORT_SYMBOL(pccard_nonstatic_ops);
Commit	Line	Data
02b03846 AC	1	#include <linux/slab.h>
	2	#include <linux/module.h>
	3	#include <linux/kernel.h>
d885d4f3	4	#include <linux/pci.h>
02b03846 AC	5
	6	#include <pcmcia/ss.h>
	7	#include <pcmcia/cistpl.h>
	8	#include "cs_internal.h"
	9
	10
	11	struct pcmcia_align_data {
	12	unsigned long mask;
	13	unsigned long offset;
	14	};
	15
	16	static resource_size_t pcmcia_align(void *align_data,
	17	const struct resource *res,
	18	resource_size_t size, resource_size_t align)
	19	{
	20	struct pcmcia_align_data *data = align_data;
	21	resource_size_t start;
	22
	23	start = (res->start & ~data->mask) + data->offset;
	24	if (start < res->start)
	25	start += data->mask + 1;
	26	return start;
	27	}
	28
	29	static struct resource find_io_region(struct pcmcia_socket s,
	30	unsigned long base, int num,
	31	unsigned long align)
	32	{
	33	struct resource *res = pcmcia_make_resource(0, num, IORESOURCE_IO,
	34	dev_name(&s->dev));
	35	struct pcmcia_align_data data;
	36	int ret;
	37
	38	data.mask = align - 1;
	39	data.offset = base & data.mask;
	40
	41	ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, 1,
	42	base, 0, pcmcia_align, &data);
	43	if (ret != 0) {
	44	kfree(res);
	45	res = NULL;
	46	}
	47	return res;
	48	}
	49
	50	static int res_pci_find_io(struct pcmcia_socket *s, unsigned int attr,
	51	unsigned int *base, unsigned int num,
	52	unsigned int align, struct resource **parent)
	53	{
	54	int i, ret = 0;
	55
	56	/* Check for an already-allocated window that must conflict with
	57	* what was asked for. It is a hack because it does not catch all
	58	* potential conflicts, just the most obvious ones.
	59	*/
	60	for (i = 0; i < MAX_IO_WIN; i++) {
	61	if (!s->io[i].res)
	62	continue;
	63
	64	if (!*base)
	65	continue;
	66
	67	if ((s->io[i].res->start & (align-1)) == *base)
	68	return -EBUSY;
69	}
70
71	for (i = 0; i < MAX_IO_WIN; i++) {
72	struct resource *res = s->io[i].res;
73	unsigned int try;
74
75	if (res && (res->flags & IORESOURCE_BITS) !=
76	(attr & IORESOURCE_BITS))
77	continue;
78
79	if (!res) {
80	if (align == 0)
81	align = 0x10000;
82
83	res = s->io[i].res = find_io_region(s, *base, num,
84	align);
85	if (!res)
86	return -EINVAL;
87
88	*base = res->start;
89	s->io[i].res->flags =
90	((res->flags & ~IORESOURCE_BITS) \|
91	(attr & IORESOURCE_BITS));
92	s->io[i].InUse = num;
93	*parent = res;
94	return 0;
95	}
96
97	/* Try to extend top of window */
98	try = res->end + 1;
99	if ((base == 0) \|\| (base == try)) {
100	ret = adjust_resource(s->io[i].res, res->start,
101	resource_size(res) + num);
102	if (ret)
103	continue;
104	*base = try;
105	s->io[i].InUse += num;
106	*parent = res;
107	return 0;
108	}
109
110	/* Try to extend bottom of window */
111	try = res->start - num;
112	if ((base == 0) \|\| (base == try)) {
113	ret = adjust_resource(s->io[i].res,
114	res->start - num,
115	resource_size(res) + num);
116	if (ret)
117	continue;
118	*base = try;
119	s->io[i].InUse += num;
120	*parent = res;
121	return 0;
122	}
123	}
124	return -EINVAL;
125	}
126
127	static struct resource *res_pci_find_mem(u_long base, u_long num,
128	u_long align, int low, struct pcmcia_socket *s)
129	{
130	struct resource *res = pcmcia_make_resource(0, num, IORESOURCE_MEM,
131	dev_name(&s->dev));
132	struct pcmcia_align_data data;
133	unsigned long min;
134	int ret;
135
136	if (align < 0x20000)
137	align = 0x20000;
138	data.mask = align - 1;
139	data.offset = base & data.mask;
140
141	min = 0;
142	if (!low)
143	min = 0x100000UL;
144
145	ret = pci_bus_alloc_resource(s->cb_dev->bus,
146	res, num, 1, min, 0,
147	pcmcia_align, &data);
148
149	if (ret != 0) {
150	kfree(res);
151	res = NULL;
152	}
153	return res;
154	}
155
156
157	static int res_pci_init(struct pcmcia_socket *s)
158	{
159	if (!s->cb_dev \|\| (!s->features & SS_CAP_PAGE_REGS)) {
160	dev_err(&s->dev, "not supported by res_pci\n");
161	return -EOPNOTSUPP;
162	}
163	return 0;
164	}
165
166	struct pccard_resource_ops pccard_nonstatic_ops = {
167	.validate_mem = NULL,
168	.find_io = res_pci_find_io,
169	.find_mem = res_pci_find_mem,
170	.init = res_pci_init,
171	.exit = NULL,
172	};
173	EXPORT_SYMBOL(pccard_nonstatic_ops);