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authorJames Smart <jsmart2021@gmail.com>2021-08-16 19:28:59 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2021-08-25 05:56:34 +0300
commitacbaa8c8ed17e768dab3f09f457fd265d7c94848 (patch)
treebb001b1ad2eb09c03aa272eb07185b109064924b /drivers/scsi
parent74a7baa2a3ee8be200ea5421fe025d5eb8621a6a (diff)
downloadlinux-acbaa8c8ed17e768dab3f09f457fd265d7c94848.tar.xz
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>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/lpfc/lpfc_bsg.c89
-rw-r--r--drivers/scsi/lpfc/lpfc_bsg.h8
2 files changed, 97 insertions, 0 deletions
diff --git a/drivers/scsi/lpfc/lpfc_bsg.c b/drivers/scsi/lpfc/lpfc_bsg.c
index 38cfe1bc6a4d..fdf08cb57207 100644
--- a/drivers/scsi/lpfc/lpfc_bsg.c
+++ b/drivers/scsi/lpfc/lpfc_bsg.c
@@ -5751,6 +5751,92 @@ job_error:
}
+static int
+lpfc_get_cgnbuf_info(struct bsg_job *job)
+{
+ struct lpfc_vport *vport = shost_priv(fc_bsg_to_shost(job));
+ struct lpfc_hba *phba = vport->phba;
+ struct fc_bsg_request *bsg_request = job->request;
+ struct fc_bsg_reply *bsg_reply = job->reply;
+ struct get_cgnbuf_info_req *cgnbuf_req;
+ struct lpfc_cgn_info *cp;
+ uint8_t *cgn_buff;
+ int size, cinfosz;
+ int rc = 0;
+
+ if (job->request_len < sizeof(struct fc_bsg_request) +
+ sizeof(struct get_cgnbuf_info_req)) {
+ rc = -ENOMEM;
+ goto job_exit;
+ }
+
+ if (!phba->sli4_hba.pc_sli4_params.cmf) {
+ rc = -ENOENT;
+ goto job_exit;
+ }
+
+ if (!phba->cgn_i || !phba->cgn_i->virt) {
+ rc = -ENOENT;
+ goto job_exit;
+ }
+
+ cp = phba->cgn_i->virt;
+ if (cp->cgn_info_version < LPFC_CGN_INFO_V3) {
+ rc = -EPERM;
+ goto job_exit;
+ }
+
+ cgnbuf_req = (struct get_cgnbuf_info_req *)
+ bsg_request->rqst_data.h_vendor.vendor_cmd;
+
+ /* For reset or size == 0 */
+ bsg_reply->reply_payload_rcv_len = 0;
+
+ if (cgnbuf_req->reset == LPFC_BSG_CGN_RESET_STAT) {
+ lpfc_init_congestion_stat(phba);
+ goto job_exit;
+ }
+
+ /* We don't want to include the CRC at the end */
+ cinfosz = sizeof(struct lpfc_cgn_info) - sizeof(uint32_t);
+
+ size = cgnbuf_req->read_size;
+ if (!size)
+ goto job_exit;
+
+ if (size < cinfosz) {
+ /* Just copy back what we can */
+ cinfosz = size;
+ rc = -E2BIG;
+ }
+
+ /* Allocate memory to read congestion info */
+ cgn_buff = vmalloc(cinfosz);
+ if (!cgn_buff) {
+ rc = -ENOMEM;
+ goto job_exit;
+ }
+
+ memcpy(cgn_buff, cp, cinfosz);
+
+ bsg_reply->reply_payload_rcv_len =
+ sg_copy_from_buffer(job->reply_payload.sg_list,
+ job->reply_payload.sg_cnt,
+ cgn_buff, cinfosz);
+
+ vfree(cgn_buff);
+
+job_exit:
+ bsg_reply->result = rc;
+ if (!rc)
+ bsg_job_done(job, bsg_reply->result,
+ bsg_reply->reply_payload_rcv_len);
+ else
+ lpfc_printf_log(phba, KERN_ERR, LOG_LIBDFC,
+ "2724 GET CGNBUF error: %d\n", rc);
+ return rc;
+}
+
/**
* lpfc_bsg_hst_vendor - process a vendor-specific fc_bsg_job
* @job: fc_bsg_job to handle
@@ -5813,6 +5899,9 @@ lpfc_bsg_hst_vendor(struct bsg_job *job)
case LPFC_BSG_VENDOR_GET_TRUNK_INFO:
rc = lpfc_get_trunk_info(job);
break;
+ case LPFC_BSG_VENDOR_GET_CGNBUF_INFO:
+ rc = lpfc_get_cgnbuf_info(job);
+ break;
default:
rc = -EINVAL;
bsg_reply->reply_payload_rcv_len = 0;
diff --git a/drivers/scsi/lpfc/lpfc_bsg.h b/drivers/scsi/lpfc/lpfc_bsg.h
index 2dc71243775d..17012bcc7c38 100644
--- a/drivers/scsi/lpfc/lpfc_bsg.h
+++ b/drivers/scsi/lpfc/lpfc_bsg.h
@@ -43,6 +43,7 @@
#define LPFC_BSG_VENDOR_RAS_GET_CONFIG 18
#define LPFC_BSG_VENDOR_RAS_SET_CONFIG 19
#define LPFC_BSG_VENDOR_GET_TRUNK_INFO 20
+#define LPFC_BSG_VENDOR_GET_CGNBUF_INFO 21
struct set_ct_event {
uint32_t command;
@@ -386,6 +387,13 @@ struct get_trunk_info_req {
uint32_t command;
};
+struct get_cgnbuf_info_req {
+ uint32_t command;
+ uint32_t read_size;
+ uint32_t reset;
+#define LPFC_BSG_CGN_RESET_STAT 1
+};
+
/* driver only */
#define SLI_CONFIG_NOT_HANDLED 0
#define SLI_CONFIG_HANDLED 1