#include <linux/device.h>
#include <linux/mm.h>
#include <asm/io.h>
-#include <asm/scatterlist.h>
#include <linux/dma-mapping.h>
#include <linux/dmapool.h>
#include <linux/usb.h>
*
* Call hcd_buffer_destroy() to clean up after using those pools.
*/
-int hcd_buffer_create (struct usb_hcd *hcd)
+int hcd_buffer_create(struct usb_hcd *hcd)
{
- char name [16];
+ char name[16];
int i, size;
- if (!hcd->self.controller->dma_mask)
+ if (!hcd->self.controller->dma_mask &&
+ !(hcd->driver->flags & HCD_LOCAL_MEM))
return 0;
- for (i = 0; i < HCD_BUFFER_POOLS; i++) {
- if (!(size = pool_max [i]))
+ for (i = 0; i < HCD_BUFFER_POOLS; i++) {
+ size = pool_max[i];
+ if (!size)
continue;
- snprintf (name, sizeof name, "buffer-%d", size);
- hcd->pool [i] = dma_pool_create (name, hcd->self.controller,
+ snprintf(name, sizeof name, "buffer-%d", size);
+ hcd->pool[i] = dma_pool_create(name, hcd->self.controller,
size, size, 0);
if (!hcd->pool [i]) {
- hcd_buffer_destroy (hcd);
+ hcd_buffer_destroy(hcd);
return -ENOMEM;
}
}
*
* This frees the buffer pools created by hcd_buffer_create().
*/
-void hcd_buffer_destroy (struct usb_hcd *hcd)
+void hcd_buffer_destroy(struct usb_hcd *hcd)
{
- int i;
+ int i;
- for (i = 0; i < HCD_BUFFER_POOLS; i++) {
- struct dma_pool *pool = hcd->pool [i];
+ for (i = 0; i < HCD_BUFFER_POOLS; i++) {
+ struct dma_pool *pool = hcd->pool[i];
if (pool) {
- dma_pool_destroy (pool);
+ dma_pool_destroy(pool);
hcd->pool[i] = NULL;
}
}
* better sharing and to leverage mm/slab.c intelligence.
*/
-void *hcd_buffer_alloc (
- struct usb_bus *bus,
+void *hcd_buffer_alloc(
+ struct usb_bus *bus,
size_t size,
gfp_t mem_flags,
dma_addr_t *dma
int i;
/* some USB hosts just use PIO */
- if (!bus->controller->dma_mask) {
+ if (!bus->controller->dma_mask &&
+ !(hcd->driver->flags & HCD_LOCAL_MEM)) {
*dma = ~(dma_addr_t) 0;
- return kmalloc (size, mem_flags);
+ return kmalloc(size, mem_flags);
}
for (i = 0; i < HCD_BUFFER_POOLS; i++) {
if (size <= pool_max [i])
- return dma_pool_alloc (hcd->pool [i], mem_flags, dma);
+ return dma_pool_alloc(hcd->pool [i], mem_flags, dma);
}
- return dma_alloc_coherent (hcd->self.controller, size, dma, 0);
+ return dma_alloc_coherent(hcd->self.controller, size, dma, 0);
}
-void hcd_buffer_free (
- struct usb_bus *bus,
+void hcd_buffer_free(
+ struct usb_bus *bus,
size_t size,
void *addr,
dma_addr_t dma
if (!addr)
return;
- if (!bus->controller->dma_mask) {
- kfree (addr);
+ if (!bus->controller->dma_mask &&
+ !(hcd->driver->flags & HCD_LOCAL_MEM)) {
+ kfree(addr);
return;
}
for (i = 0; i < HCD_BUFFER_POOLS; i++) {
if (size <= pool_max [i]) {
- dma_pool_free (hcd->pool [i], addr, dma);
+ dma_pool_free(hcd->pool [i], addr, dma);
return;
}
}
- dma_free_coherent (hcd->self.controller, size, addr, dma);
+ dma_free_coherent(hcd->self.controller, size, addr, dma);
}