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2019-08-12scsi: qla2xxx: Set the responder mode if appropriate for ELS pass-through IOCBsBart Van Assche
According to the firmware documentation responder mode must be set for ELS pass-through IOCBs if a response is expected. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Make it explicit that ELS pass-through IOCBs use little endianBart Van Assche
According to the firmware documentation the firmware expects all ELS pass-through IOCB parameters in little endian format. Make this explicit. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Check secondary image if reading the primary image failsBart Van Assche
This patch fixes several Coverity complaints about reading data that has not been initialized. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Change the return type of qla24xx_read_flash_data()Bart Van Assche
This change makes it easier to detect qla24xx_read_flash_data() failures and also to handle such failures. This change does not modify the behavior of the driver since all callers ignore the qla24xx_read_flash_data() return value. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Introduce the be_id_t and le_id_t data types for FC src/dst IDsBart Van Assche
Introduce the be_id_t and le_id_t data types for Fibre Channel source and destination ID formats supported by the firmware instead of using an uint8_t[3] array. Introduce functions for converting from and to the port_id_t data types. This patch does not change the behavior of the qla2xxx driver but improves source code readability and also allows the compiler to verify the endianness of Fibre Channel IDs. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Complain if a soft reset failsBart Van Assche
Failure of a soft reset is a severe failure. Hence report such failures. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Use memcpy() and strlcpy() instead of strcpy() and strncpy()Bart Van Assche
This patch makes the string manipulation code easier to verify. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Check the PCI info string output buffer sizeBart Van Assche
Pass the output buffer size to the code that generates a PCI info string and check the output buffer size while generating a PCI info string. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Complain if waiting for pending commands times outBart Van Assche
Such a timeout is a severe issue. Hence complain if waiting for pending commands times out. This patch fixes a small bug: it modifies qla82xx_chip_reset_cleanup() such that the "Done waiting" message is reported if qla82xx_chip_reset_cleanup() succeeded instead of if that function failed. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Declare fourth qla2x00_set_model_info() argument constBart Van Assche
Make it clear to humans and also to the compiler that the string passed as fourth argument is not modified. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Always check the qla2x00_wait_for_hba_online() return valueBart Van Assche
This patch fixes several Coverity complaints about not always checking the qla2x00_wait_for_hba_online() return value. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Suppress multiple Coverity complaint about out-of-bounds accessesBart Van Assche
This patch does not change any functionality. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Suppress a Coveritiy complaint about integer overflowBart Van Assche
This patch fixes the following Coverity complaint: Unintentional integer overflow (OVERFLOW_BEFORE_WIDEN) overflow_before_widen: Potentially overflowing expression dma_eng_num * 65536U with type unsigned int (32 bits, unsigned) is evaluated using 32-bit arithmetic, and then used in a context that expects an expression of type uint64_t (64 bits, unsigned). Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Remove unreachable code from qla83xx_idc_lock()Bart Van Assche
This was detected by Coverity. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Fix qla24xx_process_bidir_cmd()Bart Van Assche
Set the r??_data_len variables before using these instead of after. This patch fixes the following Coverity complaint: const: At condition req_data_len != rsp_data_len, the value of req_data_len must be equal to 0. const: At condition req_data_len != rsp_data_len, the value of rsp_data_len must be equal to 0. dead_error_condition: The condition req_data_len != rsp_data_len cannot be true. Cc: Himanshu Madhani <hmadhani@marvell.com> Fixes: a9b6f722f62d ("[SCSI] qla2xxx: Implementation of bidirectional.") # v3.7. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Simplify a debug statementBart Van Assche
Read the FC port state once instead of twice. This patch fixes the following Coverity complaint: Unchecked return value (CHECKED_RETURN) check_return: Calling atomic_read without checking return value (as is done elsewhere 80 out of 92 times). Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Remove dead codeBart Van Assche
Since sess == NULL before 'goto out_term2' is executed, the code under 'if (sess)' cannot be reached. Hence remove that code. This was detected by Coverity. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Complain if parsing the version string failsBart Van Assche
This patch fixes a Coverity complaint about not checking the sscanf() return value. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Complain if a mailbox command times outBart Van Assche
This patch fixes the following Coverity complaint: Unchecked return value (CHECKED_RETURN) check_return: Calling wait_for_completion_timeout without checking return value (as is done elsewhere 14 out of 17 times). Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Use strlcpy() instead of strncpy()Bart Van Assche
This patch fixes several gcc complaints about string truncation. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Do not corrupt vha->plogi_ack_listBart Van Assche
Delete the PLOGIN ACK data structure from the vha->plogi_ack_list before freeing that data structure to avoid that that list gets corrupted. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Report the firmware status code if a mailbox command failsBart Van Assche
It is helpful when debugging this driver to have the firmware status code available if a mailbox command fails. Hence report that firmware status code. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Fix session lookup in qlt_abort_work()Bart Van Assche
Pass the correct session ID to find_sess_by_s_id() instead of passing an uninitialized variable. Cc: Himanshu Madhani <hmadhani@marvell.com> Fixes: 2d70c103fd2a ("[SCSI] qla2xxx: Add LLD target-mode infrastructure for >= 24xx series") # v3.5. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Simplify qla24xx_abort_sp_done()Bart Van Assche
Instead of explicitly checking whether a timeout has occurred, ignore the del_timer() return value. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Remove two superfluous testsBart Van Assche
Since qlt_remove_target() only calls qlt_release() if vha->vha_tgt.qla_tgt != NULL, checking that pointer inside qlt_release() is not necessary. This patch fixes the following Coverity complaint: CID 188348 (#1 of 1): Dereference after null check (FORWARD_NULL) var_deref_model: Passing null pointer &vha->vha_tgt.qla_tgt->tgt_list_entry to list_del, which dereferences it. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Remove a superfluous pointer checkBart Van Assche
Checking a pointer after it has been dereferenced is not useful. This was detected by Coverity. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Simplify qlt_lport_dump()Bart Van Assche
Simplify the implementation of this function by using the %phC format specifier instead of using explicit for-loops. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Reduce the number of casts in GID list codeBart Van Assche
This patch makes the code that parses the GID list easier to read without changing the behavior of the code. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Verify locking assumptions at runtimeBart Van Assche
Make sure that locking assumptions are verified at runtime if kernel debugging is enabled. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Change data_dsd into an arrayBart Van Assche
This patch does not change any functionality but fixes a Coverity complaint about using a scalar as an array. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Declare qla_tgt_cmd.cdb constBart Van Assche
Make it clear that the CDB is not modified after processing of a SCSI command has started. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Reduce the scope of three local variables in ↵Bart Van Assche
qla2xxx_queuecommand() This patch makes it clear that the tag, hwq and qpair variables are only used in the mq path. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Change the return type of qla2x00_update_ms_fdmi_iocb() into voidBart Van Assche
The value returned by this function is not used. Hence change the return type of this function into 'void' and remove the return statement. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Declare the fourth ql_dump_buffer() argument constBart Van Assche
This patch makes it clear to humans and also to the compiler that ql_dump_buffer() does not modify the memory the @buf argument points at. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Remove a superfluous forward declarationBart Van Assche
Since qlt_make_local_sess() is defined before it is called, remove the forward declaration of that function. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Remove an include directive from qla_mr.cBart Van Assche
There is no bsg code in the qla_mr.c source file. Hence do not include the <linux/bsg-lib.h> header file from qla_mr.c. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Include the <asm/unaligned.h> header file from qla_dsd.hBart Van Assche
Since the put_unaligned_*() macros are used in this header file, include the header file that defines these macros. Cc: Himanshu Madhani <hmadhani@marvell.com> Fixes: 15b7a68c1d03 ("scsi: qla2xxx: Introduce the dsd32 and dsd64 data structures") # v5.2-rc1. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Use tabs instead of spaces for indentationBart Van Assche
This patch only modifies whitespace. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Improve Linux kernel coding style conformanceBart Van Assche
Insert a space where required, surround complex expressions in macros with parentheses, use the UL suffix instead of the (unsigned long) cast, do not use line continuations when not necessary and do not explicitly initialize static variables to zero. Cc: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Really fix qla2xxx_eh_abort()Bart Van Assche
I'm not sure how this happened but the patch that was intended to fix abort handling was incomplete. This patch fixes that patch as follows: - If aborting the SCSI command failed, wait until the SCSI command completes. - Return SUCCESS instead of FAILED if an abort attempt races with SCSI command completion. - Since qla2xxx_eh_abort() increments the sp reference count by calling sp_get(), decrement the sp reference count before returning. Cc: Himanshu Madhani <hmadhani@marvell.com> Fixes: 219d27d7147e ("scsi: qla2xxx: Fix race conditions in the code for aborting SCSI commands") Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-12scsi: qla2xxx: Make qla2x00_abort_srb() again decrease the sp reference countBart Van Assche
Since qla2x00_abort_srb() starts with increasing the reference count of @sp, decrease that same reference count before returning. Cc: Himanshu Madhani <hmadhani@marvell.com> Fixes: 219d27d7147e ("scsi: qla2xxx: Fix race conditions in the code for aborting SCSI commands") # v5.2. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-07scsi: mpt3sas: Update driver version to 31.100.00.00Suganath Prabu
Updated driver version from 29.100.00.00 to 31.100.00.00 which is equivalent to Phase 12 OOB. Signed-off-by: Suganath Prabu <suganath-prabu.subramani@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-07scsi: mpt3sas: Run SAS DEVICE STATUS CHANGE EVENT from ISRSuganath Prabu
In some cases, like while performing extensive expander reset or phy reset, user may observe that drives are not visible in OS. Driver's firmware-worker thread is blocked for more than 120 seconds resulting in a call trace. 1. Received target add event for Device A and hence driver has registered this device to SML by calling sas_rphy_add(). SML has half added this device and returned the control to the driver by quitting from sas_rphy_add() API, and started some background scanning on this device A. 2. While background scanning is going on device A, driver has received SAS DEVICE STATUS CHANGE EVENT with RC code "Internal device reset" event and hence driver has set tm_busy flag for this Device A from FW worker thread context. When tm_busy flag is set then driver return scsi commands with device busy status asking the kernel to retry the command after some time. So background scanning for device A will be waiting for this tm_busy to be cleared. 3. Meanwhile driver has received a target add event for Device B and hence driver called sas_rphy_add() API to register this device with SML. But since background scanning for Device A is still pending and SML is not quitting from sas_rphy_add(), the driver’s firmware worker thread got blocked. 4. Now driver has received SAS DEVICE STATUS CHANGE EVENT with RC code "Internal device reset complete" event. But as driver’s firmware worker thread got blocked in Step3, it can’t process this event and it was not clearing the tm_busy flag and deadlock occurred (where SML was waiting for tm_busy flag to be cleared and our FW worker thread is waiting for SML to quit from sas_device_rphy_add() API). Same deadlock will be observed even if device B is getting removed in step3. So to limit these types of deadlocks driver will process the SAS DEVICE STATUS CHANGE EVENT events from ISR context instead of processing this event from worker thread context. This improvement avoids above deadlock. Signed-off-by: Suganath Prabu <suganath-prabu.subramani@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-07scsi: mpt3sas: Reduce the performance dropSuganath Prabu
This patch is to reduce the performance drop depth observed on SATA HDD when ATA PT command is outstanding. Driver returns IO commands with status "SAM_STAT_BUSY" whenever ATA PT command is outstanding. With this, IO commands will be retried until this outstanding ATA PT to complete and hence we will observe drop in performance. As the driver is completing the subsequent IOs commands with SAM_STAT_BUSY status, these IOs has to go though the block layer. Hence it adds latency to the IOs and large performance drop is observed. So to reduce this performance dropp, added improvement in driver to return the subsequent IOs with SCSI_MLQUEUE_DEVICE_BUSY status instead of completing the IOs with SAM_STAT_BUSY status when ATA PT command is outstanding. Sending command back with SCSI_MLQUEUE_DEVICE_BUSY does not go through complete block layer stack (as scsi_done won't be called) SML will immediately retry the command and this method will avoid latency of block layer stack and the performance impact will be reduced. On Local setup, ran 512k sequential read IO operation on HGST SATA drive with existing driver & with this improvement drivers and here is the result, 1. With existing driver: IOs are running at bandwidth of ~230 rMB/s and whenever any ATA PT command is outstanding (e.g issued from systemd-udevd daemon) then this bandwidth drops to ~150 rMB/s. 2. With this improvement driver: IOs are running at bandwidth of ~230 rMB/s and whenever any ATA PT command is outstanding then this bandwidth drops to just ~190 rMB/s. Signed-off-by: Suganath Prabu <suganath-prabu.subramani@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-07scsi: mpt3sas: Handle fault during HBA initializationSuganath Prabu
During HBA initialization time, if handshake operation fails due to some firmware fault then currently driver is terminating the HBA initialization. It is possible that HBA may come up properly if diag reset is issued. So improvement is made in driver in such a way that before terminating the HBA initialization, driver checks the IOC state and if IOC state is in fault state then issue diag reset for once. If diag reset is successful then continue with HBA initialization else terminate the HBA initialization. Signed-off-by: Suganath Prabu <suganath-prabu.subramani@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-07scsi: mpt3sas: Add sysfs to know supported featuresSuganath Prabu
Currently with sysfs parameter "drv_support_bitmap" driver exposes whether driver supports toolbox memory move command or not. And application should issue the toolbox memory move command only if driver tell that memory move tool box command is supported through this sysfs parameter. In future we can utilize this sysfs parameter if any new feature is added and need to notify the same to applications. Signed-off-by: Suganath Prabu <suganath-prabu.subramani@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-07scsi: mpt3sas: Support MEMORY MOVE Tool box commandSuganath Prabu
Host uses the Memory Move Tool to copy data from any source/destination combination of system memory and IOC memory. Memory Move Tool box request contains two SGE fields, First SGE field must contains the source buffer details described by an MPI Simple SGE. The second SGE field must contains the destination buffer details described by an MPI Simple SGE. Source -> Destination 1. IOC -> IOC (Both the SGE's will be filled by application) 2. HOST -> HOST (Both the SGE's will be filled by the host, application should give sgl_offset to first SGE offset) 3. IOC -> HOST (Application will fill the first SGE and set the sgl_offset to second SGE and hence driver fills the second SGE) 4. HOST -> IOC (Application will fill IOC buffer information in the first SGE and set the sgl_offset to second SGE. Then driver will fill the second SGE with Host buffer information and just before posting the command to the firmware, driver will swap these two SGEs so that first SGE contains the HOST buffer information and second SGE contains the IOC information. Driver has to take care only of the 4th case, other three cases are by default supported by the current driver design. Signed-off-by: Suganath Prabu <suganath-prabu.subramani@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-07scsi: mpt3sas: Allow ioctls to blocked access status NVMeSuganath Prabu
If driver sees the NVMe drive with "DEVICE_BLOCKED" AccessStatus in its PCIe Device Page0, then driver removes the drive from its internal list and does not allow any IOCTL commands to be sent to the drive and will return the IOCTLs with "-ENODEV" status. The driver will now allow NVMe Encapsulated IOCTL issued to the NVMe device with an access status of DEVICE_BLOCKED. This change allows the user to flash new drive firmware online and revive the drive. Add NVMe device only the driver's internal list even though the device is in the blocked state so that the device will be visible to Apps. This way Apps can send NVMe Encapsulated IOCTLs to this drive and bring the drive online. This NVMe drive with DEVICE_BLOCKED access status won't added to the SML, it will be added only in the driver's internal list. [mkp: clarified desc] Signed-off-by: Suganath Prabu <suganath-prabu.subramani@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-07scsi: mpt3sas: Enumerate SES of a managed PCIe switchSuganath Prabu
SES device of managed PCIe switch will be enumerated same as NVMe drives. The device info type for this SES device is MPI26_PCIE_DEVINFO_SCSI (0x4), whereas the device info type for NVMe drives is MPI26_PCIE_DEVINFO_NVME (0x3). Based on this device info type driver determines whether the device is NVMe drive or a SES device of a managed PCIe switch. This SES device doesn't have the PCIe device page 2 information like NVMe drives, so driver won't read PCIe device page 2 information for SES device. This SES device uses only IEEE SGL's, So driver build's IEEE SGL's whenever it receives any SCSI commands for this SES device. Signed-off-by: Suganath Prabu <suganath-prabu.subramani@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-08-07scsi: mpt3sas: Update MPI headers to 2.6.8 specSuganath Prabu
Updated MPI to 2.6.8 specification and header files to 2.00.54. Signed-off-by: Suganath Prabu <suganath-prabu.subramani@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
generated by cgit v1.2.3 (git 2.39.1) at 2025-07-29 16:49:58 +0000