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| author | Roland Dreier <rolandd@cisco.com> | 2006-06-17 20:37:29 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2006-06-17 20:37:29 -0700 |
| commit | f5358a172f79e3f995919224401b25637f4324f6 (patch) | |
| tree | 52980f6f7707af3fca77958d04e88b9cee3c1a2a /drivers/infiniband/ulp/srp/ib_srp.h | |
| parent | a26026c1221c3e78e6e9f156994c41fb74e99022 (diff) | |
| download | linux-f5358a172f79e3f995919224401b25637f4324f6.tar.gz linux-f5358a172f79e3f995919224401b25637f4324f6.tar.bz2 linux-f5358a172f79e3f995919224401b25637f4324f6.zip | |
IB/srp: Use FMRs to map gather/scatter lists
Create an SRP FMR pool on HCAs that support FMRs, and use FMRs to map
gather/scatter lists that have more than one entry into a single
memory region that appears virtually contiguous to the SRP target
(which is the RDMA initiator).
This patch bails out on FMR mapping for SCSI commands where the
gather/scatter list cannot be mapped into a single FMR because there
are sub-page-sized entries in middle of the list. An unaligned
start or end of the list is OK.
Based on a patch by Vu Pham <vuhuong@mellanox.com>.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/ulp/srp/ib_srp.h')
| -rw-r--r-- | drivers/infiniband/ulp/srp/ib_srp.h | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/drivers/infiniband/ulp/srp/ib_srp.h b/drivers/infiniband/ulp/srp/ib_srp.h index c5cd43aae860..5ecda4ad8906 100644 --- a/drivers/infiniband/ulp/srp/ib_srp.h +++ b/drivers/infiniband/ulp/srp/ib_srp.h @@ -46,6 +46,7 @@ #include <rdma/ib_verbs.h> #include <rdma/ib_sa.h> #include <rdma/ib_cm.h> +#include <rdma/ib_fmr_pool.h> enum { SRP_PATH_REC_TIMEOUT_MS = 1000, @@ -62,7 +63,11 @@ enum { SRP_SQ_SIZE = SRP_RQ_SIZE - 1, SRP_CQ_SIZE = SRP_SQ_SIZE + SRP_RQ_SIZE, - SRP_TAG_TSK_MGMT = 1 << (SRP_RQ_SHIFT + 1) + SRP_TAG_TSK_MGMT = 1 << (SRP_RQ_SHIFT + 1), + + SRP_FMR_SIZE = 256, + SRP_FMR_POOL_SIZE = 1024, + SRP_FMR_DIRTY_SIZE = SRP_FMR_POOL_SIZE / 4 }; #define SRP_OP_RECV (1 << 31) @@ -77,15 +82,24 @@ enum srp_target_state { SRP_TARGET_REMOVED }; -struct srp_host { - u8 initiator_port_id[16]; +struct srp_device { + struct list_head dev_list; struct ib_device *dev; - u8 port; struct ib_pd *pd; struct ib_mr *mr; + struct ib_fmr_pool *fmr_pool; + int fmr_page_shift; + int fmr_page_size; + unsigned long fmr_page_mask; +}; + +struct srp_host { + u8 initiator_port_id[16]; + struct srp_device *dev; + u8 port; struct class_device class_dev; struct list_head target_list; - struct mutex target_mutex; + struct mutex target_mutex; struct completion released; struct list_head list; }; @@ -95,6 +109,7 @@ struct srp_request { struct scsi_cmnd *scmnd; struct srp_iu *cmd; struct srp_iu *tsk_mgmt; + struct ib_pool_fmr *fmr; /* * Fake scatterlist used when scmnd->use_sg==0. Can be killed * when the SCSI midlayer no longer generates non-SG commands. |