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-rw-r--r--drivers/infiniband/ulp/iser/iscsi_iser.c10
-rw-r--r--drivers/infiniband/ulp/iser/iscsi_iser.h14
-rw-r--r--drivers/infiniband/ulp/iser/iser_initiator.c2
-rw-r--r--drivers/infiniband/ulp/iser/iser_memory.c14
-rw-r--r--drivers/infiniband/ulp/iser/iser_verbs.c27
5 files changed, 60 insertions, 7 deletions
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.c b/drivers/infiniband/ulp/iser/iscsi_iser.c
index 169cc3e75018..0720bb46589f 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.c
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.c
@@ -93,6 +93,10 @@ static unsigned int iscsi_max_lun = 512;
module_param_named(max_lun, iscsi_max_lun, uint, S_IRUGO);
MODULE_PARM_DESC(max_lun, "Max LUNs to allow per session (default:512");
+unsigned int iser_max_sectors = ISER_DEF_MAX_SECTORS;
+module_param_named(max_sectors, iser_max_sectors, uint, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(max_sectors, "Max number of sectors in a single scsi command (default:1024");
+
bool iser_pi_enable = false;
module_param_named(pi_enable, iser_pi_enable, bool, S_IRUGO);
MODULE_PARM_DESC(pi_enable, "Enable T10-PI offload support (default:disabled)");
@@ -625,6 +629,8 @@ iscsi_iser_session_create(struct iscsi_endpoint *ep,
if (ep) {
iser_conn = ep->dd_data;
max_cmds = iser_conn->max_cmds;
+ shost->sg_tablesize = iser_conn->scsi_sg_tablesize;
+ shost->max_sectors = iser_conn->scsi_max_sectors;
mutex_lock(&iser_conn->state_mutex);
if (iser_conn->state != ISER_CONN_UP) {
@@ -966,8 +972,8 @@ static struct scsi_host_template iscsi_iser_sht = {
.name = "iSCSI Initiator over iSER",
.queuecommand = iscsi_queuecommand,
.change_queue_depth = scsi_change_queue_depth,
- .sg_tablesize = ISCSI_ISER_SG_TABLESIZE,
- .max_sectors = 1024,
+ .sg_tablesize = ISCSI_ISER_DEF_SG_TABLESIZE,
+ .max_sectors = ISER_DEF_MAX_SECTORS,
.cmd_per_lun = ISER_DEF_CMD_PER_LUN,
.eh_abort_handler = iscsi_eh_abort,
.eh_device_reset_handler= iscsi_eh_device_reset,
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.h b/drivers/infiniband/ulp/iser/iscsi_iser.h
index e9ebe0b2263d..0bdd7e77e5db 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.h
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.h
@@ -98,8 +98,13 @@
#define SHIFT_4K 12
#define SIZE_4K (1ULL << SHIFT_4K)
#define MASK_4K (~(SIZE_4K-1))
- /* support up to 512KB in one RDMA */
-#define ISCSI_ISER_SG_TABLESIZE (0x80000 >> SHIFT_4K)
+
+/* Default support is 512KB I/O size */
+#define ISER_DEF_MAX_SECTORS 1024
+#define ISCSI_ISER_DEF_SG_TABLESIZE ((ISER_DEF_MAX_SECTORS * 512) >> SHIFT_4K)
+/* Maximum support is 8MB I/O size */
+#define ISCSI_ISER_MAX_SG_TABLESIZE ((16384 * 512) >> SHIFT_4K)
+
#define ISER_DEF_XMIT_CMDS_DEFAULT 512
#if ISCSI_DEF_XMIT_CMDS_MAX > ISER_DEF_XMIT_CMDS_DEFAULT
#define ISER_DEF_XMIT_CMDS_MAX ISCSI_DEF_XMIT_CMDS_MAX
@@ -504,6 +509,8 @@ struct ib_conn {
* @rx_desc_head: head of rx_descs cyclic buffer
* @rx_descs: rx buffers array (cyclic buffer)
* @num_rx_descs: number of rx descriptors
+ * @scsi_sg_tablesize: scsi host sg_tablesize
+ * @scsi_max_sectors: scsi host max sectors
*/
struct iser_conn {
struct ib_conn ib_conn;
@@ -528,6 +535,8 @@ struct iser_conn {
unsigned int rx_desc_head;
struct iser_rx_desc *rx_descs;
u32 num_rx_descs;
+ unsigned short scsi_sg_tablesize;
+ unsigned int scsi_max_sectors;
};
/**
@@ -583,6 +592,7 @@ extern struct iser_global ig;
extern int iser_debug_level;
extern bool iser_pi_enable;
extern int iser_pi_guard;
+extern unsigned int iser_max_sectors;
int iser_assign_reg_ops(struct iser_device *device);
diff --git a/drivers/infiniband/ulp/iser/iser_initiator.c b/drivers/infiniband/ulp/iser/iser_initiator.c
index f1200f27b6a7..0b1f3b54a0c1 100644
--- a/drivers/infiniband/ulp/iser/iser_initiator.c
+++ b/drivers/infiniband/ulp/iser/iser_initiator.c
@@ -259,7 +259,7 @@ int iser_alloc_rx_descriptors(struct iser_conn *iser_conn,
iser_conn->min_posted_rx = iser_conn->qp_max_recv_dtos >> 2;
if (device->reg_ops->alloc_reg_res(ib_conn, session->scsi_cmds_max,
- ISCSI_ISER_SG_TABLESIZE + 1))
+ iser_conn->scsi_sg_tablesize))
goto create_rdma_reg_res_failed;
if (iser_alloc_login_buf(iser_conn))
diff --git a/drivers/infiniband/ulp/iser/iser_memory.c b/drivers/infiniband/ulp/iser/iser_memory.c
index b1261d5fbb9b..384fd0a49cca 100644
--- a/drivers/infiniband/ulp/iser/iser_memory.c
+++ b/drivers/infiniband/ulp/iser/iser_memory.c
@@ -363,7 +363,8 @@ static int iser_sg_to_page_vec(struct iser_data_buf *data,
* consecutive SG elements are actually fragments of the same physcial page.
*/
static int iser_data_buf_aligned_len(struct iser_data_buf *data,
- struct ib_device *ibdev)
+ struct ib_device *ibdev,
+ unsigned sg_tablesize)
{
struct scatterlist *sg, *sgl, *next_sg = NULL;
u64 start_addr, end_addr;
@@ -375,6 +376,14 @@ static int iser_data_buf_aligned_len(struct iser_data_buf *data,
sgl = data->sg;
start_addr = ib_sg_dma_address(ibdev, sgl);
+ if (unlikely(sgl[0].offset &&
+ data->data_len >= sg_tablesize * PAGE_SIZE)) {
+ iser_dbg("can't register length %lx with offset %x "
+ "fall to bounce buffer\n", data->data_len,
+ sgl[0].offset);
+ return 0;
+ }
+
for_each_sg(sgl, sg, data->dma_nents, i) {
if (start_check && !IS_4K_ALIGNED(start_addr))
break;
@@ -790,7 +799,8 @@ iser_handle_unaligned_buf(struct iscsi_iser_task *task,
struct iser_device *device = iser_conn->ib_conn.device;
int err, aligned_len;
- aligned_len = iser_data_buf_aligned_len(mem, device->ib_device);
+ aligned_len = iser_data_buf_aligned_len(mem, device->ib_device,
+ iser_conn->scsi_sg_tablesize);
if (aligned_len != mem->dma_nents) {
err = fall_to_bounce_buf(task, mem, dir);
if (err)
diff --git a/drivers/infiniband/ulp/iser/iser_verbs.c b/drivers/infiniband/ulp/iser/iser_verbs.c
index 0ade0e876c79..187c7125a4b9 100644
--- a/drivers/infiniband/ulp/iser/iser_verbs.c
+++ b/drivers/infiniband/ulp/iser/iser_verbs.c
@@ -756,6 +756,31 @@ static void iser_connect_error(struct rdma_cm_id *cma_id)
iser_conn->state = ISER_CONN_TERMINATING;
}
+static void
+iser_calc_scsi_params(struct iser_conn *iser_conn,
+ unsigned int max_sectors)
+{
+ struct iser_device *device = iser_conn->ib_conn.device;
+ unsigned short sg_tablesize, sup_sg_tablesize;
+
+ sg_tablesize = DIV_ROUND_UP(max_sectors * 512, SIZE_4K);
+ sup_sg_tablesize = min_t(unsigned, ISCSI_ISER_MAX_SG_TABLESIZE,
+ device->dev_attr.max_fast_reg_page_list_len);
+
+ if (sg_tablesize > sup_sg_tablesize) {
+ sg_tablesize = sup_sg_tablesize;
+ iser_conn->scsi_max_sectors = sg_tablesize * SIZE_4K / 512;
+ } else {
+ iser_conn->scsi_max_sectors = max_sectors;
+ }
+
+ iser_conn->scsi_sg_tablesize = sg_tablesize;
+
+ iser_dbg("iser_conn %p, sg_tablesize %u, max_sectors %u\n",
+ iser_conn, iser_conn->scsi_sg_tablesize,
+ iser_conn->scsi_max_sectors);
+}
+
/**
* Called with state mutex held
**/
@@ -794,6 +819,8 @@ static void iser_addr_handler(struct rdma_cm_id *cma_id)
}
}
+ iser_calc_scsi_params(iser_conn, iser_max_sectors);
+
ret = rdma_resolve_route(cma_id, 1000);
if (ret) {
iser_err("resolve route failed: %d\n", ret);
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