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scsi: lpfc: Add bsg support for retrieving adapter cmf data
Add a bsg ioctl to allow user applications to retrieve the adapter congestion management framework buffer. Link: https://lore.kernel.org/r/20210816162901.121235-15-jsmart2021@gmail.com Co-developed-by: Justin Tee <justin.tee@broadcom.com> Signed-off-by: Justin Tee <justin.tee@broadcom.com> Signed-off-by: James Smart <jsmart2021@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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2 changed files with 97 additions and 0 deletions
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@ -5751,6 +5751,92 @@ lpfc_get_trunk_info(struct bsg_job *job)
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}
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static int
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lpfc_get_cgnbuf_info(struct bsg_job *job)
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{
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struct lpfc_vport *vport = shost_priv(fc_bsg_to_shost(job));
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struct lpfc_hba *phba = vport->phba;
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struct fc_bsg_request *bsg_request = job->request;
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struct fc_bsg_reply *bsg_reply = job->reply;
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struct get_cgnbuf_info_req *cgnbuf_req;
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struct lpfc_cgn_info *cp;
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uint8_t *cgn_buff;
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int size, cinfosz;
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int rc = 0;
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if (job->request_len < sizeof(struct fc_bsg_request) +
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sizeof(struct get_cgnbuf_info_req)) {
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rc = -ENOMEM;
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goto job_exit;
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}
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if (!phba->sli4_hba.pc_sli4_params.cmf) {
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rc = -ENOENT;
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goto job_exit;
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}
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if (!phba->cgn_i || !phba->cgn_i->virt) {
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rc = -ENOENT;
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goto job_exit;
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}
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cp = phba->cgn_i->virt;
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if (cp->cgn_info_version < LPFC_CGN_INFO_V3) {
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rc = -EPERM;
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goto job_exit;
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}
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cgnbuf_req = (struct get_cgnbuf_info_req *)
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bsg_request->rqst_data.h_vendor.vendor_cmd;
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/* For reset or size == 0 */
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bsg_reply->reply_payload_rcv_len = 0;
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if (cgnbuf_req->reset == LPFC_BSG_CGN_RESET_STAT) {
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lpfc_init_congestion_stat(phba);
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goto job_exit;
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}
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/* We don't want to include the CRC at the end */
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cinfosz = sizeof(struct lpfc_cgn_info) - sizeof(uint32_t);
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size = cgnbuf_req->read_size;
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if (!size)
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goto job_exit;
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if (size < cinfosz) {
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/* Just copy back what we can */
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cinfosz = size;
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rc = -E2BIG;
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}
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/* Allocate memory to read congestion info */
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cgn_buff = vmalloc(cinfosz);
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if (!cgn_buff) {
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rc = -ENOMEM;
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goto job_exit;
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}
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memcpy(cgn_buff, cp, cinfosz);
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bsg_reply->reply_payload_rcv_len =
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sg_copy_from_buffer(job->reply_payload.sg_list,
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job->reply_payload.sg_cnt,
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cgn_buff, cinfosz);
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vfree(cgn_buff);
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job_exit:
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bsg_reply->result = rc;
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if (!rc)
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bsg_job_done(job, bsg_reply->result,
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bsg_reply->reply_payload_rcv_len);
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else
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lpfc_printf_log(phba, KERN_ERR, LOG_LIBDFC,
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"2724 GET CGNBUF error: %d\n", rc);
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return rc;
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}
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/**
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* lpfc_bsg_hst_vendor - process a vendor-specific fc_bsg_job
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* @job: fc_bsg_job to handle
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@ -5813,6 +5899,9 @@ lpfc_bsg_hst_vendor(struct bsg_job *job)
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case LPFC_BSG_VENDOR_GET_TRUNK_INFO:
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rc = lpfc_get_trunk_info(job);
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break;
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case LPFC_BSG_VENDOR_GET_CGNBUF_INFO:
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rc = lpfc_get_cgnbuf_info(job);
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break;
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default:
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rc = -EINVAL;
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bsg_reply->reply_payload_rcv_len = 0;
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@ -43,6 +43,7 @@
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#define LPFC_BSG_VENDOR_RAS_GET_CONFIG 18
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#define LPFC_BSG_VENDOR_RAS_SET_CONFIG 19
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#define LPFC_BSG_VENDOR_GET_TRUNK_INFO 20
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#define LPFC_BSG_VENDOR_GET_CGNBUF_INFO 21
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struct set_ct_event {
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uint32_t command;
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@ -386,6 +387,13 @@ struct get_trunk_info_req {
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uint32_t command;
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};
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struct get_cgnbuf_info_req {
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uint32_t command;
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uint32_t read_size;
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uint32_t reset;
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#define LPFC_BSG_CGN_RESET_STAT 1
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};
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/* driver only */
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#define SLI_CONFIG_NOT_HANDLED 0
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#define SLI_CONFIG_HANDLED 1
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