@@ -1058,6 +1058,7 @@ config SCSI_IPR
depends on PCI && SCSI && ATA
select FW_LOADER
select IRQ_POLL
+ select SGL_ALLOC
---help---
This driver supports the IBM Power Linux family RAID adapters.
This includes IBM pSeries 5712, 5703, 5709, and 570A, as well
@@ -76,6 +76,7 @@
#include <linux/hdreg.h>
#include <linux/reboot.h>
#include <linux/stringify.h>
+#include <linux/sgl_alloc.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/processor.h>
@@ -3815,10 +3816,8 @@ static struct device_attribute ipr_iopoll_weight_attr = {
**/
static struct ipr_sglist *ipr_alloc_ucode_buffer(int buf_len)
{
- int sg_size, order, bsize_elem, num_elem, i, j;
+ int sg_size, order;
struct ipr_sglist *sglist;
- struct scatterlist *scatterlist;
- struct page *page;
/* Get the minimum size per scatter/gather element */
sg_size = buf_len / (IPR_MAX_SGLIST - 1);
@@ -3826,45 +3825,18 @@ static struct ipr_sglist *ipr_alloc_ucode_buffer(int buf_len)
/* Get the actual size per element */
order = get_order(sg_size);
- /* Determine the actual number of bytes per element */
- bsize_elem = PAGE_SIZE * (1 << order);
-
- /* Determine the actual number of sg entries needed */
- if (buf_len % bsize_elem)
- num_elem = (buf_len / bsize_elem) + 1;
- else
- num_elem = buf_len / bsize_elem;
-
/* Allocate a scatter/gather list for the DMA */
- sglist = kzalloc(sizeof(struct ipr_sglist) +
- (sizeof(struct scatterlist) * (num_elem - 1)),
- GFP_KERNEL);
-
+ sglist = kzalloc(sizeof(struct ipr_sglist), GFP_KERNEL);
if (sglist == NULL) {
ipr_trace;
return NULL;
}
-
- scatterlist = sglist->scatterlist;
- sg_init_table(scatterlist, num_elem);
-
sglist->order = order;
- sglist->num_sg = num_elem;
-
- /* Allocate a bunch of sg elements */
- for (i = 0; i < num_elem; i++) {
- page = alloc_pages(GFP_KERNEL, order);
- if (!page) {
- ipr_trace;
-
- /* Free up what we already allocated */
- for (j = i - 1; j >= 0; j--)
- __free_pages(sg_page(&scatterlist[j]), order);
- kfree(sglist);
- return NULL;
- }
-
- sg_set_page(&scatterlist[i], page, 0, 0);
+ sglist->scatterlist = sgl_alloc_order(buf_len, order, &sglist->num_sg,
+ GFP_KERNEL, false);
+ if (!sglist->scatterlist) {
+ kfree(sglist);
+ return NULL;
}
return sglist;
@@ -3882,11 +3854,7 @@ static struct ipr_sglist *ipr_alloc_ucode_buffer(int buf_len)
**/
static void ipr_free_ucode_buffer(struct ipr_sglist *sglist)
{
- int i;
-
- for (i = 0; i < sglist->num_sg; i++)
- __free_pages(sg_page(&sglist->scatterlist[i]), sglist->order);
-
+ sgl_free_order(sglist->scatterlist, sglist->order);
kfree(sglist);
}
@@ -1454,7 +1454,7 @@ struct ipr_sglist {
u32 num_sg;
u32 num_dma_sg;
u32 buffer_len;
- struct scatterlist scatterlist[1];
+ struct scatterlist *scatterlist;
};
enum ipr_sdt_state {
Use the sgl_alloc_order() and sgl_free_order() functions instead of open coding these functions. Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com> Cc: linux-scsi@vger.kernel.org Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Brian King <brking@linux.vnet.ibm.com> --- drivers/scsi/Kconfig | 1 + drivers/scsi/ipr.c | 50 +++++++++----------------------------------------- drivers/scsi/ipr.h | 2 +- 3 files changed, 11 insertions(+), 42 deletions(-)