#include <pcmcia/cistpl.h>
#include "cs_internal.h"
+/* moved to rsrc_mgr.c
MODULE_AUTHOR("David A. Hinds, Dominik Brodowski");
MODULE_LICENSE("GPL");
+*/
/* Parameters that can be set with 'insmod' */
======================================================================*/
static struct resource *
-make_resource(resource_size_t b, resource_size_t n, int flags, const char *name)
-{
- struct resource *res = kzalloc(sizeof(*res), GFP_KERNEL);
-
- if (res) {
- res->name = name;
- res->start = b;
- res->end = b + n - 1;
- res->flags = flags;
- }
- return res;
-}
-
-static struct resource *
claim_region(struct pcmcia_socket *s, resource_size_t base,
resource_size_t size, int type, char *name)
{
struct resource *res, *parent;
parent = type & IORESOURCE_MEM ? &iomem_resource : &ioport_resource;
- res = make_resource(base, size, type | IORESOURCE_BUSY, name);
+ res = pcmcia_make_resource(base, size, type | IORESOURCE_BUSY, name);
if (res) {
#ifdef CONFIG_PCI
* 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;
if (start > r_start || r_end > end)
continue;
- ret = adjust_resource(res, r_start, r_end - r_start + 1);
- break;
+ ret = 0;
}
return ret;
======================================================================*/
-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 = make_resource(0, num, IORESOURCE_IO, dev_name(&s->dev));
+ struct resource *res = pcmcia_make_resource(0, num, IORESOURCE_IO,
+ dev_name(&s->dev));
struct socket_data *s_data = s->resource_data;
struct pcmcia_align_data data;
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;
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)
{
- struct resource *res = make_resource(0, num, IORESOURCE_MEM, dev_name(&s->dev));
+ struct resource *res = pcmcia_make_resource(0, num, IORESOURCE_MEM,
+ dev_name(&s->dev));
struct socket_data *s_data = s->resource_data;
struct pcmcia_align_data data;
unsigned long min, max;
return -ENODEV;
#if defined(CONFIG_X86)
- /* If this is the root bus, the risk of hitting
- * some strange system devices which aren't protected
- * by either ACPI resource tables or properly requested
- * resources is too big. Therefore, don't do auto-adding
- * of resources at the moment.
+ /* If this is the root bus, the risk of hitting some strange
+ * system devices is too high: If a driver isn't loaded, the
+ * resources are not claimed; even if a driver is loaded, it
+ * may not request all resources or even the wrong one. We
+ * can neither trust the rest of the kernel nor ACPI/PNP and
+ * CRS parsing to get it right. Therefore, use several
+ * safeguards:
+ *
+ * - Do not auto-add resources if the CardBus bridge is on
+ * the PCI root bus
+ *
+ * - Avoid any I/O ports < 0x100.
+ *
+ * - On PCI-PCI bridges, only use resources which are set up
+ * exclusively for the secondary PCI bus: the risk of hitting
+ * system devices is quite low, as they usually aren't
+ * connected to the secondary PCI bus.
*/
if (s->cb_dev->bus->number == 0)
return -EINVAL;
-#endif
+ for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; i++) {
+ res = s->cb_dev->bus->resource[i];
+#else
pci_bus_for_each_resource(s->cb_dev->bus, res, i) {
+#endif
if (!res)
continue;
if (res->flags & IORESOURCE_IO) {
+ /* safeguard against the root resource, where the
+ * risk of hitting any other device would be too
+ * high */
if (res == &ioport_resource)
continue;
+
dev_printk(KERN_INFO, &s->cb_dev->dev,
"pcmcia: parent PCI bridge window: %pR\n",
res);
}
if (res->flags & IORESOURCE_MEM) {
+ /* safeguard against the root resource, where the
+ * risk of hitting any other device would be too
+ * high */
if (res == &iomem_resource)
continue;
+
dev_printk(KERN_INFO, &s->cb_dev->dev,
"pcmcia: parent PCI bridge window: %pR\n",
res);
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,
projects / linux-flexiantxendom0-3.2.10.git / blobdiff