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author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-12 16:11:45 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-12 16:11:45 -0700 |
commit | 48efe453e6b29561f78a1df55c7f58375259cb8c (patch) | |
tree | 53d6ac1f2010b102c15b264b13fc4c98ba634d48 /include/target/target_core_fabric.h | |
parent | ac4de9543aca59f2b763746647577302fbedd57e (diff) | |
parent | 2999ee7fda3f670effbfa746164c525f9d1be4b8 (diff) |
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
Pull SCSI target updates from Nicholas Bellinger:
"Lots of activity again this round for I/O performance optimizations
(per-cpu IDA pre-allocation for vhost + iscsi/target), and the
addition of new fabric independent features to target-core
(COMPARE_AND_WRITE + EXTENDED_COPY).
The main highlights include:
- Support for iscsi-target login multiplexing across individual
network portals
- Generic Per-cpu IDA logic (kent + akpm + clameter)
- Conversion of vhost to use per-cpu IDA pre-allocation for
descriptors, SGLs and userspace page pointer list
- Conversion of iscsi-target + iser-target to use per-cpu IDA
pre-allocation for descriptors
- Add support for generic COMPARE_AND_WRITE (AtomicTestandSet)
emulation for virtual backend drivers
- Add support for generic EXTENDED_COPY (CopyOffload) emulation for
virtual backend drivers.
- Add support for fast memory registration mode to iser-target (Vu)
The patches to add COMPARE_AND_WRITE and EXTENDED_COPY support are of
particular significance, which make us the first and only open source
target to support the full set of VAAI primitives.
Currently Linux clients are lacking upstream support to actually
utilize these primitives. However, with server side support now in
place for folks like MKP + ZAB working on the client, this logic once
reserved for the highest end of storage arrays, can now be run in VMs
on their laptops"
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (50 commits)
target/iscsi: Bump versions to v4.1.0
target: Update copyright ownership/year information to 2013
iscsi-target: Bump default TCP listen backlog to 256
target: Fix >= v3.9+ regression in PR APTPL + ALUA metadata write-out
iscsi-target; Bump default CmdSN Depth to 64
iscsi-target: Remove unnecessary wait_for_completion in iscsi_get_thread_set
iscsi-target: Add thread_set->ts_activate_sem + use common deallocate
iscsi-target: Fix race with thread_pre_handler flush_signals + ISCSI_THREAD_SET_DIE
target: remove unused including <linux/version.h>
iser-target: introduce fast memory registration mode (FRWR)
iser-target: generalize rdma memory registration and cleanup
iser-target: move rdma wr processing to a shared function
target: Enable global EXTENDED_COPY setup/release
target: Add Third Party Copy (3PC) bit in INQUIRY response
target: Enable EXTENDED_COPY setup in spc_parse_cdb
target: Add support for EXTENDED_COPY copy offload emulation
target: Avoid non-existent tg_pt_gp_mem in target_alua_state_check
target: Add global device list for EXTENDED_COPY
target: Make helpers non static for EXTENDED_COPY command setup
target: Make spc_parse_naa_6h_vendor_specific non static
...
Diffstat (limited to 'include/target/target_core_fabric.h')
-rw-r--r-- | include/target/target_core_fabric.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/include/target/target_core_fabric.h b/include/target/target_core_fabric.h index 7a16178424f..882b650e32b 100644 --- a/include/target/target_core_fabric.h +++ b/include/target/target_core_fabric.h @@ -84,6 +84,9 @@ struct target_core_fabric_ops { }; struct se_session *transport_init_session(void); +int transport_alloc_session_tags(struct se_session *, unsigned int, + unsigned int); +struct se_session *transport_init_session_tags(unsigned int, unsigned int); void __transport_register_session(struct se_portal_group *, struct se_node_acl *, struct se_session *, void *); void transport_register_session(struct se_portal_group *, @@ -131,6 +134,7 @@ int core_tmr_alloc_req(struct se_cmd *, void *, u8, gfp_t); void core_tmr_release_req(struct se_tmr_req *); int transport_generic_handle_tmr(struct se_cmd *); void transport_generic_request_failure(struct se_cmd *, sense_reason_t); +void __target_execute_cmd(struct se_cmd *); int transport_lookup_tmr_lun(struct se_cmd *, u32); struct se_node_acl *core_tpg_check_initiator_node_acl(struct se_portal_group *, @@ -175,4 +179,30 @@ u32 iscsi_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl * char *iscsi_parse_pr_out_transport_id(struct se_portal_group *, const char *, u32 *, char **); +/* + * The LIO target core uses DMA_TO_DEVICE to mean that data is going + * to the target (eg handling a WRITE) and DMA_FROM_DEVICE to mean + * that data is coming from the target (eg handling a READ). However, + * this is just the opposite of what we have to tell the DMA mapping + * layer -- eg when handling a READ, the HBA will have to DMA the data + * out of memory so it can send it to the initiator, which means we + * need to use DMA_TO_DEVICE when we map the data. + */ +static inline enum dma_data_direction +target_reverse_dma_direction(struct se_cmd *se_cmd) +{ + if (se_cmd->se_cmd_flags & SCF_BIDI) + return DMA_BIDIRECTIONAL; + + switch (se_cmd->data_direction) { + case DMA_TO_DEVICE: + return DMA_FROM_DEVICE; + case DMA_FROM_DEVICE: + return DMA_TO_DEVICE; + case DMA_NONE: + default: + return DMA_NONE; + } +} + #endif /* TARGET_CORE_FABRICH */ |