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path: root/drivers/scsi/cxgb3i/cxgb3i_ddp.c
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Diffstat (limited to 'drivers/scsi/cxgb3i/cxgb3i_ddp.c')
-rw-r--r--drivers/scsi/cxgb3i/cxgb3i_ddp.c90
1 files changed, 69 insertions, 21 deletions
diff --git a/drivers/scsi/cxgb3i/cxgb3i_ddp.c b/drivers/scsi/cxgb3i/cxgb3i_ddp.c
index 99c912547902..344fd53b9954 100644
--- a/drivers/scsi/cxgb3i/cxgb3i_ddp.c
+++ b/drivers/scsi/cxgb3i/cxgb3i_ddp.c
@@ -206,6 +206,31 @@ int cxgb3i_ddp_find_page_index(unsigned long pgsz)
return DDP_PGIDX_MAX;
}
+/**
+ * cxgb3i_ddp_adjust_page_table - adjust page table with PAGE_SIZE
+ * return the ddp page index, if no match is found return DDP_PGIDX_MAX.
+ */
+int cxgb3i_ddp_adjust_page_table(void)
+{
+ int i;
+ unsigned int base_order, order;
+
+ if (PAGE_SIZE < (1UL << ddp_page_shift[0])) {
+ ddp_log_info("PAGE_SIZE 0x%lx too small, min. 0x%lx.\n",
+ PAGE_SIZE, 1UL << ddp_page_shift[0]);
+ return -EINVAL;
+ }
+
+ base_order = get_order(1UL << ddp_page_shift[0]);
+ order = get_order(1 << PAGE_SHIFT);
+ for (i = 0; i < DDP_PGIDX_MAX; i++) {
+ /* first is the kernel page size, then just doubling the size */
+ ddp_page_order[i] = order - base_order + i;
+ ddp_page_shift[i] = PAGE_SHIFT + i;
+ }
+ return 0;
+}
+
static inline void ddp_gl_unmap(struct pci_dev *pdev,
struct cxgb3i_gather_list *gl)
{
@@ -598,30 +623,40 @@ int cxgb3i_adapter_ddp_info(struct t3cdev *tdev,
* release all the resource held by the ddp pagepod manager for a given
* adapter if needed
*/
-void cxgb3i_ddp_cleanup(struct t3cdev *tdev)
+
+static void ddp_cleanup(struct kref *kref)
{
+ struct cxgb3i_ddp_info *ddp = container_of(kref,
+ struct cxgb3i_ddp_info,
+ refcnt);
int i = 0;
+
+ ddp_log_info("kref release ddp 0x%p, t3dev 0x%p.\n", ddp, ddp->tdev);
+
+ ddp->tdev->ulp_iscsi = NULL;
+ while (i < ddp->nppods) {
+ struct cxgb3i_gather_list *gl = ddp->gl_map[i];
+ if (gl) {
+ int npods = (gl->nelem + PPOD_PAGES_MAX - 1)
+ >> PPOD_PAGES_SHIFT;
+ ddp_log_info("t3dev 0x%p, ddp %d + %d.\n",
+ ddp->tdev, i, npods);
+ kfree(gl);
+ ddp_free_gl_skb(ddp, i, npods);
+ i += npods;
+ } else
+ i++;
+ }
+ cxgb3i_free_big_mem(ddp);
+}
+
+void cxgb3i_ddp_cleanup(struct t3cdev *tdev)
+{
struct cxgb3i_ddp_info *ddp = (struct cxgb3i_ddp_info *)tdev->ulp_iscsi;
ddp_log_info("t3dev 0x%p, release ddp 0x%p.\n", tdev, ddp);
-
- if (ddp) {
- tdev->ulp_iscsi = NULL;
- while (i < ddp->nppods) {
- struct cxgb3i_gather_list *gl = ddp->gl_map[i];
- if (gl) {
- int npods = (gl->nelem + PPOD_PAGES_MAX - 1)
- >> PPOD_PAGES_SHIFT;
- ddp_log_info("t3dev 0x%p, ddp %d + %d.\n",
- tdev, i, npods);
- kfree(gl);
- ddp_free_gl_skb(ddp, i, npods);
- i += npods;
- } else
- i++;
- }
- cxgb3i_free_big_mem(ddp);
- }
+ if (ddp)
+ kref_put(&ddp->refcnt, ddp_cleanup);
}
/**
@@ -631,12 +666,13 @@ void cxgb3i_ddp_cleanup(struct t3cdev *tdev)
*/
static void ddp_init(struct t3cdev *tdev)
{
- struct cxgb3i_ddp_info *ddp;
+ struct cxgb3i_ddp_info *ddp = tdev->ulp_iscsi;
struct ulp_iscsi_info uinfo;
unsigned int ppmax, bits;
int i, err;
- if (tdev->ulp_iscsi) {
+ if (ddp) {
+ kref_get(&ddp->refcnt);
ddp_log_warn("t3dev 0x%p, ddp 0x%p already set up.\n",
tdev, tdev->ulp_iscsi);
return;
@@ -670,6 +706,7 @@ static void ddp_init(struct t3cdev *tdev)
ppmax *
sizeof(struct cxgb3i_gather_list *));
spin_lock_init(&ddp->map_lock);
+ kref_init(&ddp->refcnt);
ddp->tdev = tdev;
ddp->pdev = uinfo.pdev;
@@ -715,6 +752,17 @@ void cxgb3i_ddp_init(struct t3cdev *tdev)
{
if (page_idx == DDP_PGIDX_MAX) {
page_idx = cxgb3i_ddp_find_page_index(PAGE_SIZE);
+
+ if (page_idx == DDP_PGIDX_MAX) {
+ ddp_log_info("system PAGE_SIZE %lu, update hw.\n",
+ PAGE_SIZE);
+ if (cxgb3i_ddp_adjust_page_table() < 0) {
+ ddp_log_info("PAGE_SIZE %lu, ddp disabled.\n",
+ PAGE_SIZE);
+ return;
+ }
+ page_idx = cxgb3i_ddp_find_page_index(PAGE_SIZE);
+ }
ddp_log_info("system PAGE_SIZE %lu, ddp idx %u.\n",
PAGE_SIZE, page_idx);
}