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authorJaroslav Kysela <perex@perex.cz>2010-02-02 19:58:25 +0100
committerJaroslav Kysela <perex@perex.cz>2010-02-04 21:48:00 +0100
commit21956b61f594f7924d98240da74bc81c28601fa9 (patch)
tree0514becc673bcd8b952af728700af5cdfef15e0d
parentc68db7175f4dcb3d5789bb50bea6376fb81f87fe (diff)
downloadlinux-2.6.34-ux500-21956b61f594f7924d98240da74bc81c28601fa9.tar.gz
ALSA: ctxfi - fix PTP address initialization
After hours of debugging, I finally found the reason why some source and runtime combination does not work. The PTP (page table pages) address must be aligned. I am not sure how much, but alignment to PAGE_SIZE is sufficient. Also, use ALSA's page allocation routines to ensure proper virtual -> physical address translation. Cc: <stable@kernel.org> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
-rw-r--r--sound/pci/ctxfi/ctatc.c15
-rw-r--r--sound/pci/ctxfi/ctvmem.c38
-rw-r--r--sound/pci/ctxfi/ctvmem.h8
3 files changed, 25 insertions, 36 deletions
diff --git a/sound/pci/ctxfi/ctatc.c b/sound/pci/ctxfi/ctatc.c
index cb65bd0dd35..459c1f62783 100644
--- a/sound/pci/ctxfi/ctatc.c
+++ b/sound/pci/ctxfi/ctatc.c
@@ -166,18 +166,7 @@ static void ct_unmap_audio_buffer(struct ct_atc *atc, struct ct_atc_pcm *apcm)
static unsigned long atc_get_ptp_phys(struct ct_atc *atc, int index)
{
- struct ct_vm *vm;
- void *kvirt_addr;
- unsigned long phys_addr;
-
- vm = atc->vm;
- kvirt_addr = vm->get_ptp_virt(vm, index);
- if (kvirt_addr == NULL)
- phys_addr = (~0UL);
- else
- phys_addr = virt_to_phys(kvirt_addr);
-
- return phys_addr;
+ return atc->vm->get_ptp_phys(atc->vm, index);
}
static unsigned int convert_format(snd_pcm_format_t snd_format)
@@ -1669,7 +1658,7 @@ int __devinit ct_atc_create(struct snd_card *card, struct pci_dev *pci,
}
/* Set up device virtual memory management object */
- err = ct_vm_create(&atc->vm);
+ err = ct_vm_create(&atc->vm, pci);
if (err < 0)
goto error1;
diff --git a/sound/pci/ctxfi/ctvmem.c b/sound/pci/ctxfi/ctvmem.c
index 6b78752e950..65da6e466f8 100644
--- a/sound/pci/ctxfi/ctvmem.c
+++ b/sound/pci/ctxfi/ctvmem.c
@@ -138,7 +138,7 @@ ct_vm_map(struct ct_vm *vm, struct snd_pcm_substream *substream, int size)
return NULL;
}
- ptp = vm->ptp[0];
+ ptp = (unsigned long *)vm->ptp[0].area;
pte_start = (block->addr >> CT_PAGE_SHIFT);
pages = block->size >> CT_PAGE_SHIFT;
for (i = 0; i < pages; i++) {
@@ -158,25 +158,25 @@ static void ct_vm_unmap(struct ct_vm *vm, struct ct_vm_block *block)
}
/* *
- * return the host (kmalloced) addr of the @index-th device
- * page talbe page on success, or NULL on failure.
- * The first returned NULL indicates the termination.
+ * return the host physical addr of the @index-th device
+ * page table page on success, or ~0UL on failure.
+ * The first returned ~0UL indicates the termination.
* */
-static void *
-ct_get_ptp_virt(struct ct_vm *vm, int index)
+static dma_addr_t
+ct_get_ptp_phys(struct ct_vm *vm, int index)
{
- void *addr;
+ dma_addr_t addr;
- addr = (index >= CT_PTP_NUM) ? NULL : vm->ptp[index];
+ addr = (index >= CT_PTP_NUM) ? ~0UL : vm->ptp[index].addr;
return addr;
}
-int ct_vm_create(struct ct_vm **rvm)
+int ct_vm_create(struct ct_vm **rvm, struct pci_dev *pci)
{
struct ct_vm *vm;
struct ct_vm_block *block;
- int i;
+ int i, err = 0;
*rvm = NULL;
@@ -188,23 +188,21 @@ int ct_vm_create(struct ct_vm **rvm)
/* Allocate page table pages */
for (i = 0; i < CT_PTP_NUM; i++) {
- vm->ptp[i] = kmalloc(PAGE_SIZE, GFP_KERNEL);
- if (!vm->ptp[i])
+ err = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
+ snd_dma_pci_data(pci),
+ PAGE_SIZE, &vm->ptp[i]);
+ if (err < 0)
break;
}
- if (!i) {
+ if (err < 0) {
/* no page table pages are allocated */
- kfree(vm);
+ ct_vm_destroy(vm);
return -ENOMEM;
}
vm->size = CT_ADDRS_PER_PAGE * i;
- /* Initialise remaining ptps */
- for (; i < CT_PTP_NUM; i++)
- vm->ptp[i] = NULL;
-
vm->map = ct_vm_map;
vm->unmap = ct_vm_unmap;
- vm->get_ptp_virt = ct_get_ptp_virt;
+ vm->get_ptp_phys = ct_get_ptp_phys;
INIT_LIST_HEAD(&vm->unused);
INIT_LIST_HEAD(&vm->used);
block = kzalloc(sizeof(*block), GFP_KERNEL);
@@ -242,7 +240,7 @@ void ct_vm_destroy(struct ct_vm *vm)
/* free allocated page table pages */
for (i = 0; i < CT_PTP_NUM; i++)
- kfree(vm->ptp[i]);
+ snd_dma_free_pages(&vm->ptp[i]);
vm->size = 0;
diff --git a/sound/pci/ctxfi/ctvmem.h b/sound/pci/ctxfi/ctvmem.h
index 01e4fd0386a..b23adfca4de 100644
--- a/sound/pci/ctxfi/ctvmem.h
+++ b/sound/pci/ctxfi/ctvmem.h
@@ -22,6 +22,8 @@
#include <linux/mutex.h>
#include <linux/list.h>
+#include <linux/pci.h>
+#include <sound/memalloc.h>
/* The chip can handle the page table of 4k pages
* (emu20k1 can handle even 8k pages, but we don't use it right now)
@@ -41,7 +43,7 @@ struct snd_pcm_substream;
/* Virtual memory management object for card device */
struct ct_vm {
- void *ptp[CT_PTP_NUM]; /* Device page table pages */
+ struct snd_dma_buffer ptp[CT_PTP_NUM]; /* Device page table pages */
unsigned int size; /* Available addr space in bytes */
struct list_head unused; /* List of unused blocks */
struct list_head used; /* List of used blocks */
@@ -52,10 +54,10 @@ struct ct_vm {
int size);
/* Unmap device logical addr area. */
void (*unmap)(struct ct_vm *, struct ct_vm_block *block);
- void *(*get_ptp_virt)(struct ct_vm *vm, int index);
+ dma_addr_t (*get_ptp_phys)(struct ct_vm *vm, int index);
};
-int ct_vm_create(struct ct_vm **rvm);
+int ct_vm_create(struct ct_vm **rvm, struct pci_dev *pci);
void ct_vm_destroy(struct ct_vm *vm);
#endif /* CTVMEM_H */