[SCSI] lpfc 8.3.0 : Add kernel-doc headers to lpfc_scsi.c
Add kernel-doc function headers to lpfc_scsi.c Signed-off-by: James Smart <James.Smart@emulex.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
James Smart
James Bottomley
Родитель
3a55b5327b
Коммит
9bad76719e
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@ -92,7 +92,6 @@ lpfc_update_stats(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
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spin_unlock_irqrestore(shost->host_lock, flags);
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}
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/**
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* lpfc_send_sdev_queuedepth_change_event: Posts a queuedepth change
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* event.
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@ -148,10 +147,17 @@ lpfc_send_sdev_queuedepth_change_event(struct lpfc_hba *phba,
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return;
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}
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/*
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* This function is called with no lock held when there is a resource
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* error in driver or in firmware.
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*/
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/**
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* lpfc_adjust_queue_depth: Post RAMP_DOWN_QUEUE event for worker thread.
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* @phba: The Hba for which this call is being executed.
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*
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* This routine is called when there is resource error in driver or firmware.
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* This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine
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* posts at most 1 event each second. This routine wakes up worker thread of
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* @phba to process WORKER_RAM_DOWN_EVENT event.
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*
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* This routine should be called with no lock held.
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**/
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void
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lpfc_adjust_queue_depth(struct lpfc_hba *phba)
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{
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@ -182,10 +188,17 @@ lpfc_adjust_queue_depth(struct lpfc_hba *phba)
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return;
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}
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/*
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* This function is called with no lock held when there is a successful
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* SCSI command completion.
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*/
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/**
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* lpfc_rampup_queue_depth: Post RAMP_UP_QUEUE event for worker thread.
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* @phba: The Hba for which this call is being executed.
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*
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* This routine post WORKER_RAMP_UP_QUEUE event for @phba vport. This routine
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* post at most 1 event every 5 minute after last_ramp_up_time or
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* last_rsrc_error_time. This routine wakes up worker thread of @phba
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* to process WORKER_RAM_DOWN_EVENT event.
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*
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* This routine should be called with no lock held.
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**/
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static inline void
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lpfc_rampup_queue_depth(struct lpfc_vport *vport,
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struct scsi_device *sdev)
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@ -217,6 +230,14 @@ lpfc_rampup_queue_depth(struct lpfc_vport *vport,
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return;
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}
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/**
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* lpfc_ramp_down_queue_handler: WORKER_RAMP_DOWN_QUEUE event handler.
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* @phba: The Hba for which this call is being executed.
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*
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* This routine is called to process WORKER_RAMP_DOWN_QUEUE event for worker
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* thread.This routine reduces queue depth for all scsi device on each vport
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* associated with @phba.
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**/
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void
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lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
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{
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@ -267,6 +288,15 @@ lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
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atomic_set(&phba->num_cmd_success, 0);
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}
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/**
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* lpfc_ramp_up_queue_handler: WORKER_RAMP_UP_QUEUE event handler.
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* @phba: The Hba for which this call is being executed.
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*
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* This routine is called to process WORKER_RAMP_UP_QUEUE event for worker
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* thread.This routine increases queue depth for all scsi device on each vport
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* associated with @phba by 1. This routine also sets @phba num_rsrc_err and
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* num_cmd_success to zero.
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**/
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void
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lpfc_ramp_up_queue_handler(struct lpfc_hba *phba)
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{
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@ -336,14 +366,21 @@ lpfc_scsi_dev_block(struct lpfc_hba *phba)
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lpfc_destroy_vport_work_array(phba, vports);
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}
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/*
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/**
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* lpfc_new_scsi_buf: Scsi buffer allocator.
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* @vport: The virtual port for which this call being executed.
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*
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* This routine allocates a scsi buffer, which contains all the necessary
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* information needed to initiate a SCSI I/O. The non-DMAable buffer region
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* contains information to build the IOCB. The DMAable region contains
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* memory for the FCP CMND, FCP RSP, and the inital BPL. In addition to
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* allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL
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* memory for the FCP CMND, FCP RSP, and the initial BPL. In addition to
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* allocating memory, the FCP CMND and FCP RSP BDEs are setup in the BPL
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* and the BPL BDE is setup in the IOCB.
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*/
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*
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* Return codes:
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* NULL - Error
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* Pointer to lpfc_scsi_buf data structure - Success
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**/
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static struct lpfc_scsi_buf *
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lpfc_new_scsi_buf(struct lpfc_vport *vport)
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{
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@ -452,6 +489,17 @@ lpfc_new_scsi_buf(struct lpfc_vport *vport)
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return psb;
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}
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/**
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* lpfc_get_scsi_buf: Get a scsi buffer from lpfc_scsi_buf_list list of Hba.
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* @phba: The Hba for which this call is being executed.
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*
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* This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
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* and returns to caller.
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*
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* Return codes:
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* NULL - Error
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* Pointer to lpfc_scsi_buf - Success
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**/
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static struct lpfc_scsi_buf*
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lpfc_get_scsi_buf(struct lpfc_hba * phba)
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{
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@ -469,6 +517,14 @@ lpfc_get_scsi_buf(struct lpfc_hba * phba)
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return lpfc_cmd;
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}
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/**
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* lpfc_release_scsi_buf: Return a scsi buffer back to hba lpfc_scsi_buf_list list.
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* @phba: The Hba for which this call is being executed.
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* @psb: The scsi buffer which is being released.
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*
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* This routine releases @psb scsi buffer by adding it to tail of @phba
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* lpfc_scsi_buf_list list.
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**/
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static void
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lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
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{
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@ -480,6 +536,20 @@ lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
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spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
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}
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/**
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* lpfc_scsi_prep_dma_buf: Routine to do DMA mapping for scsi buffer.
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* @phba: The Hba for which this call is being executed.
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* @lpfc_cmd: The scsi buffer which is going to be mapped.
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*
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* This routine does the pci dma mapping for scatter-gather list of scsi cmnd
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* field of @lpfc_cmd. This routine scans through sg elements and format the
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* bdea. This routine also initializes all IOCB fields which are dependent on
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* scsi command request buffer.
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*
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* Return codes:
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* 1 - Error
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* 0 - Success
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**/
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static int
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lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
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{
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@ -681,6 +751,15 @@ lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
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lpfc_worker_wake_up(phba);
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return;
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}
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/**
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* lpfc_scsi_unprep_dma_buf: Routine to un-map DMA mapping of scatter gather.
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* @phba: The Hba for which this call is being executed.
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* @psb: The scsi buffer which is going to be un-mapped.
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*
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* This routine does DMA un-mapping of scatter gather list of scsi command
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* field of @lpfc_cmd.
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**/
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static void
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lpfc_scsi_unprep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
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{
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@ -694,6 +773,16 @@ lpfc_scsi_unprep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
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scsi_dma_unmap(psb->pCmd);
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}
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/**
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* lpfc_handler_fcp_err: FCP response handler.
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* @vport: The virtual port for which this call is being executed.
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* @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
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* @rsp_iocb: The response IOCB which contains FCP error.
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*
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* This routine is called to process response IOCB with status field
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* IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command
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* based upon SCSI and FCP error.
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**/
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static void
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lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
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struct lpfc_iocbq *rsp_iocb)
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@ -828,6 +917,16 @@ lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
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lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
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}
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/**
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* lpfc_scsi_cmd_iocb_cmpl: Scsi cmnd IOCB completion routine.
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* @phba: The Hba for which this call is being executed.
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* @pIocbIn: The command IOCBQ for the scsi cmnd.
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* @pIocbOut: The response IOCBQ for the scsi cmnd .
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*
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* This routine assigns scsi command result by looking into response IOCB
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* status field appropriately. This routine handles QUEUE FULL condition as
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* well by ramping down device queue depth.
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**/
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static void
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lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
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struct lpfc_iocbq *pIocbOut)
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@ -1067,6 +1166,15 @@ lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
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}
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}
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/**
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* lpfc_scsi_prep_cmnd: Routine to convert scsi cmnd to FCP information unit.
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* @vport: The virtual port for which this call is being executed.
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* @lpfc_cmd: The scsi command which needs to send.
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* @pnode: Pointer to lpfc_nodelist.
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*
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* This routine initializes fcp_cmnd and iocb data structure from scsi command
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* to transfer.
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**/
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static void
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lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
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struct lpfc_nodelist *pnode)
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@ -1152,6 +1260,19 @@ lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
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piocbq->vport = vport;
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}
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/**
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* lpfc_scsi_prep_task_mgmt_cmnd: Convert scsi TM cmnd to FCP information unit.
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* @vport: The virtual port for which this call is being executed.
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* @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
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* @lun: Logical unit number.
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* @task_mgmt_cmd: SCSI task management command.
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*
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* This routine creates FCP information unit corresponding to @task_mgmt_cmd.
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*
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* Return codes:
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* 0 - Error
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* 1 - Success
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**/
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static int
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lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
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struct lpfc_scsi_buf *lpfc_cmd,
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@ -1201,6 +1322,15 @@ lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
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return 1;
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}
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/**
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* lpc_taskmgmt_def_cmpl: IOCB completion routine for task management command.
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* @phba: The Hba for which this call is being executed.
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* @cmdiocbq: Pointer to lpfc_iocbq data structure.
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* @rspiocbq: Pointer to lpfc_iocbq data structure.
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*
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* This routine is IOCB completion routine for device reset and target reset
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* routine. This routine release scsi buffer associated with lpfc_cmd.
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**/
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static void
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lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
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struct lpfc_iocbq *cmdiocbq,
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@ -1213,6 +1343,20 @@ lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
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return;
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}
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/**
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* lpfc_scsi_tgt_reset: Target reset handler.
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* @lpfc_cmd: Pointer to lpfc_scsi_buf data structure
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* @vport: The virtual port for which this call is being executed.
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* @tgt_id: Target ID.
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* @lun: Lun number.
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* @rdata: Pointer to lpfc_rport_data.
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*
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* This routine issues a TARGET RESET iocb to reset a target with @tgt_id ID.
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*
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* Return Code:
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* 0x2003 - Error
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* 0x2002 - Success.
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**/
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static int
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lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport,
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unsigned tgt_id, unsigned int lun,
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@ -1266,6 +1410,15 @@ lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport,
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return ret;
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}
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/**
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* lpfc_info: Info entry point of scsi_host_template data structure.
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* @host: The scsi host for which this call is being executed.
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*
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* This routine provides module information about hba.
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*
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* Reutrn code:
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* Pointer to char - Success.
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**/
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const char *
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lpfc_info(struct Scsi_Host *host)
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{
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@ -1295,6 +1448,13 @@ lpfc_info(struct Scsi_Host *host)
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return lpfcinfobuf;
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}
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/**
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* lpfc_poll_rearm_time: Routine to modify fcp_poll timer of hba.
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* @phba: The Hba for which this call is being executed.
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*
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* This routine modifies fcp_poll_timer field of @phba by cfg_poll_tmo.
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* The default value of cfg_poll_tmo is 10 milliseconds.
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**/
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static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
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{
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unsigned long poll_tmo_expires =
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@ -1305,11 +1465,25 @@ static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
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poll_tmo_expires);
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}
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/**
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* lpfc_poll_start_timer: Routine to start fcp_poll_timer of HBA.
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* @phba: The Hba for which this call is being executed.
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*
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* This routine starts the fcp_poll_timer of @phba.
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**/
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void lpfc_poll_start_timer(struct lpfc_hba * phba)
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{
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lpfc_poll_rearm_timer(phba);
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}
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/**
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* lpfc_poll_timeout: Restart polling timer.
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* @ptr: Map to lpfc_hba data structure pointer.
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*
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* This routine restarts fcp_poll timer, when FCP ring polling is enable
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* and FCP Ring interrupt is disable.
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**/
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void lpfc_poll_timeout(unsigned long ptr)
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{
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struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
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@ -1321,6 +1495,20 @@ void lpfc_poll_timeout(unsigned long ptr)
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}
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}
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/**
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* lpfc_queuecommand: Queuecommand entry point of Scsi Host Templater data
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* structure.
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* @cmnd: Pointer to scsi_cmnd data structure.
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* @done: Pointer to done routine.
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*
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* Driver registers this routine to scsi midlayer to submit a @cmd to process.
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* This routine prepares an IOCB from scsi command and provides to firmware.
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* The @done callback is invoked after driver finished processing the command.
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*
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* Return value :
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* 0 - Success
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* SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily.
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**/
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static int
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lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
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{
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@ -1405,6 +1593,12 @@ lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
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return 0;
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}
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/**
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* lpfc_block_error_handler: Routine to block error handler.
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* @cmnd: Pointer to scsi_cmnd data structure.
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*
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* This routine blocks execution till fc_rport state is not FC_PORSTAT_BLCOEKD.
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**/
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static void
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lpfc_block_error_handler(struct scsi_cmnd *cmnd)
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{
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@ -1421,6 +1615,17 @@ lpfc_block_error_handler(struct scsi_cmnd *cmnd)
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return;
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}
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/**
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* lpfc_abort_handler: Eh_abort_handler entry point of Scsi Host Template data
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*structure.
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* @cmnd: Pointer to scsi_cmnd data structure.
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*
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* This routine aborts @cmnd pending in base driver.
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*
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* Return code :
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* 0x2003 - Error
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* 0x2002 - Success
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**/
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static int
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lpfc_abort_handler(struct scsi_cmnd *cmnd)
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{
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@ -1516,6 +1721,18 @@ lpfc_abort_handler(struct scsi_cmnd *cmnd)
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return ret;
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}
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/**
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* lpfc_device_reset_handler: eh_device_reset entry point of Scsi Host Template
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*data structure.
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* @cmnd: Pointer to scsi_cmnd data structure.
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*
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* This routine does a device reset by sending a TARGET_RESET task management
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* command.
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*
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* Return code :
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||||
* 0x2003 - Error
|
||||
* 0ex2002 - Success
|
||||
**/
|
||||
static int
|
||||
lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
|
||||
{
|
||||
|
|
@ -1633,6 +1850,17 @@ lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
|
|||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* lpfc_bus_reset_handler: eh_bus_reset_handler entry point of Scsi Host
|
||||
* Template data structure.
|
||||
* @cmnd: Pointer to scsi_cmnd data structure.
|
||||
*
|
||||
* This routine does target reset to all target on @cmnd->device->host.
|
||||
*
|
||||
* Return Code:
|
||||
* 0x2003 - Error
|
||||
* 0x2002 - Success
|
||||
**/
|
||||
static int
|
||||
lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
|
||||
{
|
||||
|
|
@ -1723,6 +1951,20 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
|
|||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* lpfc_slave_alloc: slave_alloc entry point of Scsi Host Template data
|
||||
* structure.
|
||||
* @sdev: Pointer to scsi_device.
|
||||
*
|
||||
* This routine populates the cmds_per_lun count + 2 scsi_bufs into this host's
|
||||
* globally available list of scsi buffers. This routine also makes sure scsi
|
||||
* buffer is not allocated more than HBA limit conveyed to midlayer. This list
|
||||
* of scsi buffer exists for the lifetime of the driver.
|
||||
*
|
||||
* Return codes:
|
||||
* non-0 - Error
|
||||
* 0 - Success
|
||||
**/
|
||||
static int
|
||||
lpfc_slave_alloc(struct scsi_device *sdev)
|
||||
{
|
||||
|
|
@ -1784,6 +2026,19 @@ lpfc_slave_alloc(struct scsi_device *sdev)
|
|||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* lpfc_slave_configure: slave_configure entry point of Scsi Host Templater data
|
||||
* structure.
|
||||
* @sdev: Pointer to scsi_device.
|
||||
*
|
||||
* This routine configures following items
|
||||
* - Tag command queuing support for @sdev if supported.
|
||||
* - Dev loss time out value of fc_rport.
|
||||
* - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
|
||||
*
|
||||
* Return codes:
|
||||
* 0 - Success
|
||||
**/
|
||||
static int
|
||||
lpfc_slave_configure(struct scsi_device *sdev)
|
||||
{
|
||||
|
|
@ -1813,6 +2068,12 @@ lpfc_slave_configure(struct scsi_device *sdev)
|
|||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* lpfc_slave_destroy: slave_destroy entry point of SHT data structure.
|
||||
* @sdev: Pointer to scsi_device.
|
||||
*
|
||||
* This routine sets @sdev hostatdata filed to null.
|
||||
**/
|
||||
static void
|
||||
lpfc_slave_destroy(struct scsi_device *sdev)
|
||||
{
|
||||
|
|
|
|||
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