diff options
| author | Vu Pham <vu@mellanox.com> | 2006-06-17 20:37:32 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2006-06-17 20:37:32 -0700 |
| commit | 74b0a15b5e18e44206c98419745a472c3d28e561 (patch) | |
| tree | 9aa9846193df826cc81d2072a0ca56a569ea9668 | |
| parent | 52fb2b50c4baa1430064c1e6c1c7df473d469df1 (diff) | |
IB/srp: Allow sg_tablesize to be adjusted
Make the sg_tablesize used by SRP adjustable at module load time via a
module parameter. Calculate the corresponding IU length required to
support this.
Signed-off-by: Vu Pham <vu@mellanox.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
| -rw-r--r-- | drivers/infiniband/ulp/srp/ib_srp.c | 21 | ||||
| -rw-r--r-- | drivers/infiniband/ulp/srp/ib_srp.h | 5 |
2 files changed, 17 insertions, 9 deletions
diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c index 8e6b10369717..a01b73bb976e 100644 --- a/drivers/infiniband/ulp/srp/ib_srp.c +++ b/drivers/infiniband/ulp/srp/ib_srp.c @@ -62,6 +62,13 @@ MODULE_DESCRIPTION("InfiniBand SCSI RDMA Protocol initiator " "v" DRV_VERSION " (" DRV_RELDATE ")"); MODULE_LICENSE("Dual BSD/GPL"); +static int srp_sg_tablesize = SRP_DEF_SG_TABLESIZE; +static int srp_max_iu_len; + +module_param(srp_sg_tablesize, int, 0444); +MODULE_PARM_DESC(srp_sg_tablesize, + "Max number of gather/scatter entries per I/O (default is 12)"); + static int topspin_workarounds = 1; module_param(topspin_workarounds, int, 0444); @@ -311,7 +318,7 @@ static int srp_send_req(struct srp_target_port *target) req->priv.opcode = SRP_LOGIN_REQ; req->priv.tag = 0; - req->priv.req_it_iu_len = cpu_to_be32(SRP_MAX_IU_LEN); + req->priv.req_it_iu_len = cpu_to_be32(srp_max_iu_len); req->priv.req_buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT | SRP_BUF_FORMAT_INDIRECT); memcpy(req->priv.initiator_port_id, target->srp_host->initiator_port_id, 16); @@ -953,7 +960,7 @@ static int srp_queuecommand(struct scsi_cmnd *scmnd, goto err; dma_sync_single_for_cpu(target->srp_host->dev->dev->dma_device, iu->dma, - SRP_MAX_IU_LEN, DMA_TO_DEVICE); + srp_max_iu_len, DMA_TO_DEVICE); req = list_entry(target->free_reqs.next, struct srp_request, list); @@ -986,7 +993,7 @@ static int srp_queuecommand(struct scsi_cmnd *scmnd, } dma_sync_single_for_device(target->srp_host->dev->dev->dma_device, iu->dma, - SRP_MAX_IU_LEN, DMA_TO_DEVICE); + srp_max_iu_len, DMA_TO_DEVICE); if (__srp_post_send(target, iu, len)) { printk(KERN_ERR PFX "Send failed\n"); @@ -1018,7 +1025,7 @@ static int srp_alloc_iu_bufs(struct srp_target_port *target) for (i = 0; i < SRP_SQ_SIZE + 1; ++i) { target->tx_ring[i] = srp_alloc_iu(target->srp_host, - SRP_MAX_IU_LEN, + srp_max_iu_len, GFP_KERNEL, DMA_TO_DEVICE); if (!target->tx_ring[i]) goto err; @@ -1436,7 +1443,6 @@ static struct scsi_host_template srp_template = { .eh_host_reset_handler = srp_reset_host, .can_queue = SRP_SQ_SIZE, .this_id = -1, - .sg_tablesize = SRP_MAX_INDIRECT, .cmd_per_lun = SRP_SQ_SIZE, .use_clustering = ENABLE_CLUSTERING, .shost_attrs = srp_host_attrs @@ -1914,6 +1920,11 @@ static int __init srp_init_module(void) { int ret; + srp_template.sg_tablesize = srp_sg_tablesize; + srp_max_iu_len = (sizeof (struct srp_cmd) + + sizeof (struct srp_indirect_buf) + + srp_sg_tablesize * 16); + ret = class_register(&srp_class); if (ret) { printk(KERN_ERR PFX "couldn't register class infiniband_srp\n"); diff --git a/drivers/infiniband/ulp/srp/ib_srp.h b/drivers/infiniband/ulp/srp/ib_srp.h index c071c3032700..033a44772ae3 100644 --- a/drivers/infiniband/ulp/srp/ib_srp.h +++ b/drivers/infiniband/ulp/srp/ib_srp.h @@ -56,7 +56,7 @@ enum { SRP_DLID_REDIRECT = 2, SRP_MAX_LUN = 512, - SRP_MAX_IU_LEN = 256, + SRP_DEF_SG_TABLESIZE = 12, SRP_RQ_SHIFT = 6, SRP_RQ_SIZE = 1 << SRP_RQ_SHIFT, @@ -71,9 +71,6 @@ enum { }; #define SRP_OP_RECV (1 << 31) -#define SRP_MAX_INDIRECT ((SRP_MAX_IU_LEN - \ - sizeof (struct srp_cmd) - \ - sizeof (struct srp_indirect_buf)) / 16) enum srp_target_state { SRP_TARGET_LIVE, |