scsi: lpfc: Fix WQ/CQ creation for older asic's.

The patch to enlarge WQ/CQ creation keys off of an adapter response that
indicates support for the larger values. Older adapters return an
incorrect response and are limited in size.  Thus the adapters fail the
WQ creation steps.

Augment the WQ sizing checks with a check on the older adapter types and
limit them to the restricted sizes.

Fixes: c176ffa0841c ("scsi: lpfc: Increase CQ and WQ sizes for SCSI")
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/lpfc/lpfc_hw4.h b/drivers/scsi/lpfc/lpfc_hw4.h
index 98b8055..9df1c8d 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_hw4.h
+++ b/drivers/scsi/lpfc/lpfc_hw4.h
@@ -104,6 +104,17 @@ struct lpfc_sli_intf {
 #define LPFC_SLI_INTF_IF_TYPE_VIRT     1
 };
 
+struct lpfc_sli_asic_rev {
+       u32 word0;
+#define LPFC_SLI_ASIC_VER_A    0x0
+#define LPFC_SLI_ASIC_VER_B    0x1
+#define LPFC_SLI_ASIC_VER_C    0x2
+#define LPFC_SLI_ASIC_VER_D    0x3
+#define lpfc_sli_asic_ver_SHIFT                4
+#define lpfc_sli_asic_ver_MASK         0x0000000F
+#define lpfc_sli_asic_ver_WORD         word0
+};
+
 #define LPFC_SLI4_MBX_EMBED    true
 #define LPFC_SLI4_MBX_NEMBED   false
 
@@ -566,6 +577,7 @@ struct lpfc_register {
 
 /* The following BAR0 register sets are defined for if_type 0 and 2 UCNAs. */
 #define LPFC_SLI_INTF                  0x0058
+#define LPFC_SLI_ASIC_VER              0x009C
 
 #define LPFC_CTL_PORT_SEM_OFFSET       0x400
 #define lpfc_port_smphr_perr_SHIFT     31

diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 8dac676..060f0e2 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -9514,6 +9514,11 @@ lpfc_sli4_pci_mem_setup(struct lpfc_hba *phba)
                return error;
        }
 
+       if (pci_read_config_dword(pdev, LPFC_SLI_ASIC_VER,
+                                 &phba->sli4_hba.sli_asic_ver.word0)) {
+               return error;
+       }
+
        /* There is no SLI3 failback for SLI4 devices. */
        if (bf_get(lpfc_sli_intf_valid, &phba->sli4_hba.sli_intf) !=
            LPFC_SLI_INTF_VALID) {
@@ -10545,6 +10550,7 @@ lpfc_get_sli4_parameters(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
        struct lpfc_pc_sli4_params *sli4_params;
        uint32_t mbox_tmo;
        int length;
+       bool exp_wqcq_pages = true;
        struct lpfc_sli4_parameters *mbx_sli4_parameters;
 
        /*
@@ -10671,8 +10677,17 @@ lpfc_get_sli4_parameters(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
                        phba->nvme_support, phba->nvme_embed_pbde,
                        phba->cfg_nvme_embed_cmd, phba->cfg_suppress_rsp);
 
+       if ((bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) ==
+           LPFC_SLI_INTF_IF_TYPE_2) &&
+           (bf_get(lpfc_sli_intf_sli_family, &phba->sli4_hba.sli_intf) ==
+                LPFC_SLI_INTF_FAMILY_LNCR_A0) &&
+           (bf_get(lpfc_sli_asic_ver, &phba->sli4_hba.sli_asic_ver) ==
+           LPFC_SLI_ASIC_VER_A))
+               exp_wqcq_pages = false;
+
        if ((bf_get(cfg_cqpsize, mbx_sli4_parameters) & LPFC_CQ_16K_PAGE_SZ) &&
            (bf_get(cfg_wqpsize, mbx_sli4_parameters) & LPFC_WQ_16K_PAGE_SZ) &&
+           exp_wqcq_pages &&
            (sli4_params->wqsize & LPFC_WQ_SZ128_SUPPORT))
                phba->enab_exp_wqcq_pages = 1;
        else

diff --git a/drivers/scsi/lpfc/lpfc_sli4.h b/drivers/scsi/lpfc/lpfc_sli4.h
index cf64aca..179e870 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_sli4.h
+++ b/drivers/scsi/lpfc/lpfc_sli4.h
@@ -592,6 +592,7 @@ struct lpfc_sli4_hba {
        uint32_t ue_to_sr;
        uint32_t ue_to_rp;
        struct lpfc_register sli_intf;
+       struct lpfc_register sli_asic_ver;
        struct lpfc_pc_sli4_params pc_sli4_params;
        struct lpfc_bbscn_params bbscn_params;
        struct lpfc_hba_eq_hdl *hba_eq_hdl; /* HBA per-WQ handle */