[RFC v2 10/18] lpfc: vmid: vmid resource allocation

From: Muneendra <muneendra.kumar@broadcom.com>
To: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org,
	tj@kernel.org, linux-nvme@lists.infradead.org
Cc: pbonzini@redhat.com, jsmart2021@gmail.com, mkumar@redhat.com,
	emilne@redhat.com,
	Gaurav Srivastava <gaurav.srivastava@broadcom.com>
Subject: [RFC v2 10/18] lpfc: vmid: vmid resource allocation
Date: Mon, 19 Oct 2020 13:13:05 +0530	[thread overview]
Message-ID: <1603093393-12875-11-git-send-email-muneendra.kumar@broadcom.com> (raw)
In-Reply-To: <1603093393-12875-1-git-send-email-muneendra.kumar@broadcom.com>


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From: Gaurav Srivastava <gaurav.srivastava@broadcom.com>

This patch allocates the resource for vmid and checks if the firmware
supports the feature or not.

Signed-off-by: Gaurav Srivastava  <gaurav.srivastava@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>

---
v2:
Ported the patch on top of 5.10/scsi-queue
---
 drivers/scsi/lpfc/lpfc_init.c | 64 +++++++++++++++++++++++++++++++++++
 drivers/scsi/lpfc/lpfc_mbox.c |  6 ++++
 drivers/scsi/lpfc/lpfc_sli.c  |  9 +++++
 3 files changed, 79 insertions(+)

diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index ca25e54bb782..e32d69515586 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -4284,6 +4284,62 @@ lpfc_get_wwpn(struct lpfc_hba *phba)
 		return rol64(wwn, 32);
 }
 
+/**
+ * lpfc_vmid_res_alloc - Allocates resources for VMID
+ * @phba: pointer to lpfc hba data structure.
+ * @vport: pointer to vport data structure
+ *
+ * This routine allocated the resources needed for the vmid.
+ *
+ * Return codes
+ *	0 on Succeess
+ *	Non-0 on Failure
+ */
+u8
+lpfc_vmid_res_alloc(struct lpfc_hba *phba, struct lpfc_vport *vport)
+{
+	u16 i;
+
+	/* vmid feature is supported only on SLI4 */
+	if (phba->sli_rev == LPFC_SLI_REV3) {
+		phba->cfg_vmid_app_header = 0;
+		phba->cfg_vmid_priority_tagging = 0;
+	}
+
+	/* if enabled, then allocated the resources */
+	if (lpfc_is_vmid_enabled(phba)) {
+		vport->vmid =
+		    kmalloc_array(phba->cfg_max_vmid, sizeof(struct lpfc_vmid),
+				  GFP_KERNEL);
+		if (!vport->vmid)
+			return 1;
+
+		memset(vport->vmid, 0,
+		       phba->cfg_max_vmid * sizeof(struct lpfc_vmid));
+
+		rwlock_init(&vport->vmid_lock);
+
+		/* setting the VMID parameters for the vport */
+		vport->vmid_priority_tagging = phba->cfg_vmid_priority_tagging;
+		vport->vmid_inactivity_timeout =
+		    phba->cfg_vmid_inactivity_timeout;
+		vport->max_vmid = phba->cfg_max_vmid;
+		vport->cur_vmid_cnt = 0;
+
+		for (i = 0; i < LPFC_VMID_HASH_SIZE; i++)
+			vport->hash_table[i] = NULL;
+
+		vport->vmid_priority_range = bitmap_zalloc
+			(LPFC_VMID_MAX_PRIORITY_RANGE, GFP_KERNEL);
+
+		if (!vport->vmid_priority_range) {
+			kfree(vport->vmid);
+			return 1;
+		}
+	}
+	return 0;
+}
+
 /**
  * lpfc_create_port - Create an FC port
  * @phba: pointer to lpfc hba data structure.
@@ -4439,6 +4495,12 @@ lpfc_create_port(struct lpfc_hba *phba, int instance, struct device *dev)
 			vport->port_type, shost->sg_tablesize,
 			phba->cfg_scsi_seg_cnt, phba->cfg_sg_seg_cnt);
 
+	/* allocate the resources for vmid */
+	rc = lpfc_vmid_res_alloc(phba, vport);
+
+	if (rc)
+		goto out;
+
 	/* Initialize all internally managed lists. */
 	INIT_LIST_HEAD(&vport->fc_nodes);
 	INIT_LIST_HEAD(&vport->rcv_buffer_list);
@@ -4463,6 +4525,8 @@ lpfc_create_port(struct lpfc_hba *phba, int instance, struct device *dev)
 	return vport;
 
 out_put_shost:
+	kfree(vport->vmid);
+	bitmap_free(vport->vmid_priority_range);
 	scsi_host_put(shost);
 out:
 	return NULL;
diff --git a/drivers/scsi/lpfc/lpfc_mbox.c b/drivers/scsi/lpfc/lpfc_mbox.c
index 3414ffcb26fe..78a9b9baecf3 100644
--- a/drivers/scsi/lpfc/lpfc_mbox.c
+++ b/drivers/scsi/lpfc/lpfc_mbox.c
@@ -2100,6 +2100,12 @@ lpfc_request_features(struct lpfc_hba *phba, struct lpfcMboxq *mboxq)
 		bf_set(lpfc_mbx_rq_ftr_rq_iaab, &mboxq->u.mqe.un.req_ftrs, 0);
 		bf_set(lpfc_mbx_rq_ftr_rq_iaar, &mboxq->u.mqe.un.req_ftrs, 0);
 	}
+
+	/* Enable Application Services Header for apphedr VMID */
+	if (phba->cfg_vmid_app_header) {
+		bf_set(lpfc_mbx_rq_ftr_rq_ashdr, &mboxq->u.mqe.un.req_ftrs, 1);
+		bf_set(lpfc_ftr_ashdr, &phba->sli4_hba.sli4_flags, 1);
+	}
 	return;
 }
 
diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index 4cd7ded656b7..51b99b7beaf9 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -7558,6 +7558,15 @@ lpfc_sli4_hba_setup(struct lpfc_hba *phba)
 		goto out_free_mbox;
 	}
 
+	/* Disable vmid if app header is not supported */
+	if (phba->cfg_vmid_app_header && !(bf_get(lpfc_mbx_rq_ftr_rsp_ashdr,
+						  &mqe->un.req_ftrs))) {
+		bf_set(lpfc_ftr_ashdr, &phba->sli4_hba.sli4_flags, 0);
+		phba->cfg_vmid_app_header = 0;
+		lpfc_printf_log(phba, KERN_DEBUG, LOG_SLI,
+				"1242 vmid feature not supported");
+	}
+
 	/*
 	 * The port must support FCP initiator mode as this is the
 	 * only mode running in the host.
-- 
2.26.2


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