From: Rob Evers <revers@redhat.com>
Date: Tue, 16 Feb 2010 19:38:00 -0500
Subject: lpfc: Implement the PORT_CAPABITIES mailbox command
Message-id: <20100216193721.8604.87984.sendpatchset@localhost.localdomain>
Patchwork-id: 23294
O-Subject: [RHEL5.5 4/7] lpfc: Implement the PORT_CAPABITIES mailbox command
Bugzilla: 564506
RH-Acked-by: Mike Christie <mchristi@redhat.com>
RH-Acked-by: Tomas Henzl <thenzl@redhat.com>

https://bugzilla.redhat.com/show_bug.cgi?id=564506

Implement the PORT_CAPABITIES mailbox command

Signed-off-by: Jarod Wilson <jarod@redhat.com>

diff --git a/drivers/scsi/lpfc/lpfc_crtn.h b/drivers/scsi/lpfc/lpfc_crtn.h
index 31335c8..c814562 100644
--- a/drivers/scsi/lpfc/lpfc_crtn.h
+++ b/drivers/scsi/lpfc/lpfc_crtn.h
@@ -54,6 +54,9 @@ void lpfc_reg_vpi(struct lpfc_vport *, LPFC_MBOXQ_t *);
 void lpfc_unreg_vpi(struct lpfc_hba *, uint16_t, LPFC_MBOXQ_t *);
 void lpfc_init_link(struct lpfc_hba *, LPFC_MBOXQ_t *, uint32_t, uint32_t);
 void lpfc_request_features(struct lpfc_hba *, struct lpfcMboxq *);
+void lpfc_supported_pages(struct lpfcMboxq *);
+void lpfc_sli4_params(struct lpfcMboxq *);
+int lpfc_pc_sli4_params_get(struct lpfc_hba *, LPFC_MBOXQ_t *);
 
 struct lpfc_vport *lpfc_find_vport_by_did(struct lpfc_hba *, uint32_t);
 void lpfc_cleanup_rcv_buffers(struct lpfc_vport *);
diff --git a/drivers/scsi/lpfc/lpfc_hw4.h b/drivers/scsi/lpfc/lpfc_hw4.h
index 3441c41..a896749 100644
--- a/drivers/scsi/lpfc/lpfc_hw4.h
+++ b/drivers/scsi/lpfc/lpfc_hw4.h
@@ -66,8 +66,8 @@ struct lpfc_sli_intf {
 #define lpfc_sli_intf_featurelevel1_SHIFT	16
 #define lpfc_sli_intf_featurelevel1_MASK	0x000000FF
 #define lpfc_sli_intf_featurelevel1_WORD	word0
-#define LPFC_SLI_INTF_FEATERLEVEL1_1	1
-#define LPFC_SLI_INTF_FEATERLEVEL1_2	2
+#define LPFC_SLI_INTF_FEATURELEVEL1_1	1
+#define LPFC_SLI_INTF_FEATURELEVEL1_2	2
 #define lpfc_sli_intf_sli_family_SHIFT		8
 #define lpfc_sli_intf_sli_family_MASK		0x000000FF
 #define lpfc_sli_intf_sli_family_WORD		word0
@@ -165,6 +165,9 @@ struct lpfc_sli_intf {
 #define LPFC_FP_DEF_IMAX       10000
 #define LPFC_SP_DEF_IMAX       10000
 
+/* PORT_CAPABILITIES constants. */
+#define LPFC_MAX_SUPPORTED_PAGES	8
+
 struct ulp_bde64 {
 	union ULP_BDE_TUS {
 		uint32_t w;
@@ -1822,6 +1825,177 @@ struct lpfc_mbx_request_features {
 #define lpfc_mbx_rq_ftr_rsp_ifip_WORD		word3
 };
 
+struct lpfc_mbx_supp_pages {
+	uint32_t word1;
+#define qs_SHIFT 				0
+#define qs_MASK					0x00000001
+#define qs_WORD					word1
+#define wr_SHIFT				1
+#define wr_MASK 				0x00000001
+#define wr_WORD					word1
+#define pf_SHIFT				8
+#define pf_MASK					0x000000ff
+#define pf_WORD					word1
+#define cpn_SHIFT				16
+#define cpn_MASK				0x000000ff
+#define cpn_WORD				word1
+	uint32_t word2;
+#define list_offset_SHIFT 			0
+#define list_offset_MASK			0x000000ff
+#define list_offset_WORD			word2
+#define next_offset_SHIFT			8
+#define next_offset_MASK			0x000000ff
+#define next_offset_WORD			word2
+#define elem_cnt_SHIFT				16
+#define elem_cnt_MASK				0x000000ff
+#define elem_cnt_WORD				word2
+	uint32_t word3;
+#define pn_0_SHIFT				24
+#define pn_0_MASK  				0x000000ff
+#define pn_0_WORD				word3
+#define pn_1_SHIFT				16
+#define pn_1_MASK				0x000000ff
+#define pn_1_WORD				word3
+#define pn_2_SHIFT				8
+#define pn_2_MASK				0x000000ff
+#define pn_2_WORD				word3
+#define pn_3_SHIFT				0
+#define pn_3_MASK				0x000000ff
+#define pn_3_WORD				word3
+	uint32_t word4;
+#define pn_4_SHIFT				24
+#define pn_4_MASK				0x000000ff
+#define pn_4_WORD				word4
+#define pn_5_SHIFT				16
+#define pn_5_MASK				0x000000ff
+#define pn_5_WORD				word4
+#define pn_6_SHIFT				8
+#define pn_6_MASK				0x000000ff
+#define pn_6_WORD				word4
+#define pn_7_SHIFT				0
+#define pn_7_MASK				0x000000ff
+#define pn_7_WORD				word4
+	uint32_t rsvd[27];
+#define LPFC_SUPP_PAGES			0
+#define LPFC_BLOCK_GUARD_PROFILES	1
+#define LPFC_SLI4_PARAMETERS		2
+};
+
+struct lpfc_mbx_sli4_params {
+	uint32_t word1;
+#define qs_SHIFT				0
+#define qs_MASK					0x00000001
+#define qs_WORD					word1
+#define wr_SHIFT				1
+#define wr_MASK					0x00000001
+#define wr_WORD					word1
+#define pf_SHIFT				8
+#define pf_MASK					0x000000ff
+#define pf_WORD					word1
+#define cpn_SHIFT				16
+#define cpn_MASK				0x000000ff
+#define cpn_WORD				word1
+	uint32_t word2;
+#define if_type_SHIFT				0
+#define if_type_MASK				0x00000007
+#define if_type_WORD				word2
+#define sli_rev_SHIFT				4
+#define sli_rev_MASK				0x0000000f
+#define sli_rev_WORD				word2
+#define sli_family_SHIFT			8
+#define sli_family_MASK				0x000000ff
+#define sli_family_WORD				word2
+#define featurelevel_1_SHIFT			16
+#define featurelevel_1_MASK			0x000000ff
+#define featurelevel_1_WORD			word2
+#define featurelevel_2_SHIFT			24
+#define featurelevel_2_MASK			0x0000001f
+#define featurelevel_2_WORD			word2
+	uint32_t word3;
+#define fcoe_SHIFT 				0
+#define fcoe_MASK				0x00000001
+#define fcoe_WORD				word3
+#define fc_SHIFT				1
+#define fc_MASK					0x00000001
+#define fc_WORD					word3
+#define nic_SHIFT				2
+#define nic_MASK				0x00000001
+#define nic_WORD				word3
+#define iscsi_SHIFT				3
+#define iscsi_MASK				0x00000001
+#define iscsi_WORD				word3
+#define rdma_SHIFT				4
+#define rdma_MASK				0x00000001
+#define rdma_WORD				word3
+	uint32_t sge_supp_len;
+	uint32_t word5;
+#define if_page_sz_SHIFT			0
+#define if_page_sz_MASK				0x0000ffff
+#define if_page_sz_WORD				word5
+#define loopbk_scope_SHIFT			24
+#define loopbk_scope_MASK			0x0000000f
+#define loopbk_scope_WORD			word5
+#define rq_db_window_SHIFT			28
+#define rq_db_window_MASK			0x0000000f
+#define rq_db_window_WORD			word5
+	uint32_t word6;
+#define eq_pages_SHIFT				0
+#define eq_pages_MASK				0x0000000f
+#define eq_pages_WORD				word6
+#define eqe_size_SHIFT				8
+#define eqe_size_MASK				0x000000ff
+#define eqe_size_WORD				word6
+	uint32_t word7;
+#define cq_pages_SHIFT				0
+#define cq_pages_MASK				0x0000000f
+#define cq_pages_WORD				word7
+#define cqe_size_SHIFT				8
+#define cqe_size_MASK				0x000000ff
+#define cqe_size_WORD				word7
+	uint32_t word8;
+#define mq_pages_SHIFT				0
+#define mq_pages_MASK				0x0000000f
+#define mq_pages_WORD				word8
+#define mqe_size_SHIFT				8
+#define mqe_size_MASK				0x000000ff
+#define mqe_size_WORD				word8
+#define mq_elem_cnt_SHIFT			16
+#define mq_elem_cnt_MASK			0x000000ff
+#define mq_elem_cnt_WORD			word8
+	uint32_t word9;
+#define wq_pages_SHIFT				0
+#define wq_pages_MASK				0x0000ffff
+#define wq_pages_WORD				word9
+#define wqe_size_SHIFT				8
+#define wqe_size_MASK				0x000000ff
+#define wqe_size_WORD				word9
+	uint32_t word10;
+#define rq_pages_SHIFT				0
+#define rq_pages_MASK				0x0000ffff
+#define rq_pages_WORD				word10
+#define rqe_size_SHIFT				8
+#define rqe_size_MASK				0x000000ff
+#define rqe_size_WORD				word10
+	uint32_t word11;
+#define hdr_pages_SHIFT				0
+#define hdr_pages_MASK				0x0000000f
+#define hdr_pages_WORD				word11
+#define hdr_size_SHIFT				8
+#define hdr_size_MASK				0x0000000f
+#define hdr_size_WORD				word11
+#define hdr_pp_align_SHIFT			16
+#define hdr_pp_align_MASK			0x0000ffff
+#define hdr_pp_align_WORD			word11
+	uint32_t word12;
+#define sgl_pages_SHIFT				0
+#define sgl_pages_MASK				0x0000000f
+#define sgl_pages_WORD				word12
+#define sgl_pp_align_SHIFT			16
+#define sgl_pp_align_MASK			0x0000ffff
+#define sgl_pp_align_WORD			word12
+	uint32_t rsvd_13_63[51];
+};
+
 /* Mailbox Completion Queue Error Messages */
 #define MB_CQE_STATUS_SUCCESS 			0x0
 #define MB_CQE_STATUS_INSUFFICIENT_PRIVILEGES	0x1
@@ -1871,6 +2045,8 @@ struct lpfc_mqe {
 		struct lpfc_mbx_request_features req_ftrs;
 		struct lpfc_mbx_post_hdr_tmpl hdr_tmpl;
 		struct lpfc_mbx_query_fw_cfg query_fw_cfg;
+		struct lpfc_mbx_supp_pages supp_pages;
+		struct lpfc_mbx_sli4_params sli4_params;
 		struct lpfc_mbx_nop nop;
 	} un;
 };
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 5967d41..87d0afd 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -2451,10 +2451,8 @@ lpfc_create_port(struct lpfc_hba *phba, int instance, struct device *dev)
 	shost->this_id = -1;
 	shost->max_cmd_len = 16;
 	if (phba->sli_rev == LPFC_SLI_REV4) {
-		if (bf_get(lpfc_sli_intf_featurelevel1,
-			   &phba->sli4_hba.sli_intf) ==
-				LPFC_SLI_INTF_FEATERLEVEL1_1)
-			shost->dma_boundary = LPFC_SLI4_FL1_MAX_SEGMENT_SIZE;
+		shost->dma_boundary =
+			phba->sli4_hba.pc_sli4_params.sge_supp_len;
 		shost->sg_tablesize = phba->cfg_sg_seg_cnt;
 	}
 
@@ -3536,7 +3534,10 @@ static int
 lpfc_sli4_driver_resource_setup(struct lpfc_hba *phba)
 {
 	struct lpfc_sli *psli;
+	LPFC_MBOXQ_t *mboxq;
 	int rc, i, hbq_count, buf_size, dma_buf_size, max_buf_size;
+	uint8_t pn_page[LPFC_MAX_SUPPORTED_PAGES] = {0};
+	struct lpfc_mqe *mqe;
 
 	/* Before proceed, wait for POST done and device ready */
 	rc = lpfc_sli4_post_status_check(phba);
@@ -3595,7 +3596,7 @@ lpfc_sli4_driver_resource_setup(struct lpfc_hba *phba)
 		    ((phba->cfg_sg_seg_cnt + 2) * sizeof(struct sli4_sge)));
 	/* Feature Level 1 hardware is limited to 2 pages */
 	if ((bf_get(lpfc_sli_intf_featurelevel1, &phba->sli4_hba.sli_intf) ==
-	     LPFC_SLI_INTF_FEATERLEVEL1_1))
+	     LPFC_SLI_INTF_FEATURELEVEL1_1))
 		max_buf_size = LPFC_SLI4_FL1_MAX_BUF_SIZE;
 	else
 		max_buf_size = LPFC_SLI4_MAX_BUF_SIZE;
@@ -3726,6 +3727,43 @@ lpfc_sli4_driver_resource_setup(struct lpfc_hba *phba)
 		goto out_free_fcp_eq_hdl;
 	}
 
+	mboxq = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool,
+						       GFP_KERNEL);
+	if (!mboxq) {
+		rc = -ENOMEM;
+		goto out_free_fcp_eq_hdl;
+	}
+
+	/* Get the Supported Pages. It is always available. */
+	lpfc_supported_pages(mboxq);
+	rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_POLL);
+	if (unlikely(rc)) {
+		rc = -EIO;
+		mempool_free(mboxq, phba->mbox_mem_pool);
+		goto out_free_fcp_eq_hdl;
+	}
+
+	mqe = &mboxq->u.mqe;
+	memcpy(&pn_page[0], ((uint8_t *)&mqe->un.supp_pages.word3),
+	       LPFC_MAX_SUPPORTED_PAGES);
+	for (i = 0; i < LPFC_MAX_SUPPORTED_PAGES; i++) {
+		switch (pn_page[i]) {
+		case LPFC_SLI4_PARAMETERS:
+			phba->sli4_hba.pc_sli4_params.supported = 1;
+			break;
+		default:
+			break;
+		}
+	}
+
+	/* Read the port's SLI4 Parameters capabilities if supported. */
+	if (phba->sli4_hba.pc_sli4_params.supported)
+		rc = lpfc_pc_sli4_params_get(phba, mboxq);
+	mempool_free(mboxq, phba->mbox_mem_pool);
+	if (rc) {
+		rc = -EIO;
+		goto out_free_fcp_eq_hdl;
+	}
 	return rc;
 
 out_free_fcp_eq_hdl:
@@ -6863,6 +6901,73 @@ lpfc_sli4_hba_unset(struct lpfc_hba *phba)
 	phba->pport->work_port_events = 0;
 }
 
+ /**
+ * lpfc_pc_sli4_params_get - Get the SLI4_PARAMS port capabilities.
+ * @phba: Pointer to HBA context object.
+ * @mboxq: Pointer to the mailboxq memory for the mailbox command response.
+ *
+ * This function is called in the SLI4 code path to read the port's
+ * sli4 capabilities.
+ *
+ * This function may be be called from any context that can block-wait
+ * for the completion.  The expectation is that this routine is called
+ * typically from probe_one or from the online routine.
+ **/
+int
+lpfc_pc_sli4_params_get(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
+{
+	int rc;
+	struct lpfc_mqe *mqe;
+	struct lpfc_pc_sli4_params *sli4_params;
+	uint32_t mbox_tmo;
+
+	rc = 0;
+	mqe = &mboxq->u.mqe;
+
+	/* Read the port's SLI4 Parameters port capabilities */
+	lpfc_sli4_params(mboxq);
+	if (!phba->sli4_hba.intr_enable)
+		rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_POLL);
+	else {
+		mbox_tmo = lpfc_mbox_tmo_val(phba, MBX_PORT_CAPABILITIES);
+		rc = lpfc_sli_issue_mbox_wait(phba, mboxq, mbox_tmo);
+	}
+
+	if (unlikely(rc))
+		return 1;
+
+	sli4_params = &phba->sli4_hba.pc_sli4_params;
+	sli4_params->if_type = bf_get(if_type, &mqe->un.sli4_params);
+	sli4_params->sli_rev = bf_get(sli_rev, &mqe->un.sli4_params);
+	sli4_params->sli_family = bf_get(sli_family, &mqe->un.sli4_params);
+	sli4_params->featurelevel_1 = bf_get(featurelevel_1,
+					     &mqe->un.sli4_params);
+	sli4_params->featurelevel_2 = bf_get(featurelevel_2,
+					     &mqe->un.sli4_params);
+	sli4_params->proto_types = mqe->un.sli4_params.word3;
+	sli4_params->sge_supp_len = mqe->un.sli4_params.sge_supp_len;
+	sli4_params->if_page_sz = bf_get(if_page_sz, &mqe->un.sli4_params);
+	sli4_params->rq_db_window = bf_get(rq_db_window, &mqe->un.sli4_params);
+	sli4_params->loopbk_scope = bf_get(loopbk_scope, &mqe->un.sli4_params);
+	sli4_params->eq_pages_max = bf_get(eq_pages, &mqe->un.sli4_params);
+	sli4_params->eqe_size = bf_get(eqe_size, &mqe->un.sli4_params);
+	sli4_params->cq_pages_max = bf_get(cq_pages, &mqe->un.sli4_params);
+	sli4_params->cqe_size = bf_get(cqe_size, &mqe->un.sli4_params);
+	sli4_params->mq_pages_max = bf_get(mq_pages, &mqe->un.sli4_params);
+	sli4_params->mqe_size = bf_get(mqe_size, &mqe->un.sli4_params);
+	sli4_params->mq_elem_cnt = bf_get(mq_elem_cnt, &mqe->un.sli4_params);
+	sli4_params->wq_pages_max = bf_get(wq_pages, &mqe->un.sli4_params);
+	sli4_params->wqe_size = bf_get(wqe_size, &mqe->un.sli4_params);
+	sli4_params->rq_pages_max = bf_get(rq_pages, &mqe->un.sli4_params);
+	sli4_params->rqe_size = bf_get(rqe_size, &mqe->un.sli4_params);
+	sli4_params->hdr_pages_max = bf_get(hdr_pages, &mqe->un.sli4_params);
+	sli4_params->hdr_size = bf_get(hdr_size, &mqe->un.sli4_params);
+	sli4_params->hdr_pp_align = bf_get(hdr_pp_align, &mqe->un.sli4_params);
+	sli4_params->sgl_pages_max = bf_get(sgl_pages, &mqe->un.sli4_params);
+	sli4_params->sgl_pp_align = bf_get(sgl_pp_align, &mqe->un.sli4_params);
+	return rc;
+}
+
 /**
  * lpfc_pci_probe_one_s3 - PCI probe func to reg SLI-3 device to PCI subsystem.
  * @pdev: pointer to PCI device
diff --git a/drivers/scsi/lpfc/lpfc_mbox.c b/drivers/scsi/lpfc/lpfc_mbox.c
index e2b6910..b82b214 100644
--- a/drivers/scsi/lpfc/lpfc_mbox.c
+++ b/drivers/scsi/lpfc/lpfc_mbox.c
@@ -2024,3 +2024,41 @@ lpfc_resume_rpi(struct lpfcMboxq *mbox, struct lpfc_nodelist *ndlp)
 	bf_set(lpfc_resume_rpi_ii, resume_rpi, RESUME_INDEX_RPI);
 	resume_rpi->event_tag = ndlp->phba->fc_eventTag;
 }
+
+/**
+ * lpfc_supported_pages - Initialize the PORT_CAPABILITIES supported pages
+ *                        mailbox command.
+ * @mbox: pointer to lpfc mbox command to initialize.
+ *
+ * The PORT_CAPABILITIES supported pages mailbox command is issued to
+ * retrieve the particular feature pages supported by the port.
+ **/
+void
+lpfc_supported_pages(struct lpfcMboxq *mbox)
+{
+	struct lpfc_mbx_supp_pages *supp_pages;
+
+	memset(mbox, 0, sizeof(*mbox));
+	supp_pages = &mbox->u.mqe.un.supp_pages;
+	bf_set(lpfc_mqe_command, &mbox->u.mqe, MBX_PORT_CAPABILITIES);
+	bf_set(cpn, supp_pages, LPFC_SUPP_PAGES);
+}
+
+/**
+ * lpfc_sli4_params - Initialize the PORT_CAPABILITIES SLI4 Params
+ *                    mailbox command.
+ * @mbox: pointer to lpfc mbox command to initialize.
+ *
+ * The PORT_CAPABILITIES SLI4 parameters mailbox command is issued to
+ * retrieve the particular SLI4 features supported by the port.
+ **/
+void
+lpfc_sli4_params(struct lpfcMboxq *mbox)
+{
+	struct lpfc_mbx_sli4_params *sli4_params;
+
+	memset(mbox, 0, sizeof(*mbox));
+	sli4_params = &mbox->u.mqe.un.sli4_params;
+	bf_set(lpfc_mqe_command, &mbox->u.mqe, MBX_PORT_CAPABILITIES);
+	bf_set(cpn, sli4_params, LPFC_SLI4_PARAMETERS);
+}
diff --git a/drivers/scsi/lpfc/lpfc_sli4.h b/drivers/scsi/lpfc/lpfc_sli4.h
index 648dd5d..2882de9 100644
--- a/drivers/scsi/lpfc/lpfc_sli4.h
+++ b/drivers/scsi/lpfc/lpfc_sli4.h
@@ -285,6 +285,42 @@ struct lpfc_fcp_eq_hdl {
 	struct lpfc_hba *phba;
 };
 
+/* Port Capabilities for SLI4 Parameters */
+struct lpfc_pc_sli4_params {
+	uint32_t supported;
+	uint32_t if_type;
+	uint32_t sli_rev;
+	uint32_t sli_family;
+	uint32_t featurelevel_1;
+	uint32_t featurelevel_2;
+	uint32_t proto_types;
+#define LPFC_SLI4_PROTO_FCOE	0x0000001
+#define LPFC_SLI4_PROTO_FC	0x0000002
+#define LPFC_SLI4_PROTO_NIC	0x0000004
+#define LPFC_SLI4_PROTO_ISCSI	0x0000008
+#define LPFC_SLI4_PROTO_RDMA	0x0000010
+	uint32_t sge_supp_len;
+	uint32_t if_page_sz;
+	uint32_t rq_db_window;
+	uint32_t loopbk_scope;
+	uint32_t eq_pages_max;
+	uint32_t eqe_size;
+	uint32_t cq_pages_max;
+	uint32_t cqe_size;
+	uint32_t mq_pages_max;
+	uint32_t mqe_size;
+	uint32_t mq_elem_cnt;
+	uint32_t wq_pages_max;
+	uint32_t wqe_size;
+	uint32_t rq_pages_max;
+	uint32_t rqe_size;
+	uint32_t hdr_pages_max;
+	uint32_t hdr_size;
+	uint32_t hdr_pp_align;
+	uint32_t sgl_pages_max;
+	uint32_t sgl_pp_align;
+};
+
 /* SLI4 HBA data structure entries */
 struct lpfc_sli4_hba {
 	void __iomem *conf_regs_memmap_p; /* Kernel memory mapped address for
@@ -314,6 +350,7 @@ struct lpfc_sli4_hba {
 	uint32_t ue_mask_lo;
 	uint32_t ue_mask_hi;
 	struct lpfc_register sli_intf;
+	struct lpfc_pc_sli4_params pc_sli4_params;
 	struct msix_entry *msix_entries;
 	uint32_t cfg_eqn;
 	struct lpfc_fcp_eq_hdl *fcp_eq_hdl; /* FCP per-WQ handle */