scsi: cxlflash: Setup LISNs for master contexts

Similar to user contexts, master contexts also require that the per-context
LISN registers be programmed for certain AFUs. The mapped trigger page is
obtained from underlying transport and registered with AFU for each master
context.

Signed-off-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Acked-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/cxlflash/main.c b/drivers/scsi/cxlflash/main.c
index 5d754d1..8c55fcd 100644 (file)
--- a/drivers/scsi/cxlflash/main.c
+++ b/drivers/scsi/cxlflash/main.c
@@ -1756,6 +1756,8 @@ static int init_global(struct cxlflash_cfg *cfg)
        u64 wwpn[MAX_FC_PORTS]; /* wwpn of AFU ports */
        int i = 0, num_ports = 0;
        int rc = 0;
+       int j;
+       void *ctx;
        u64 reg;
 
        rc = read_vpd(cfg, &wwpn[0]);
@@ -1816,6 +1818,25 @@ static int init_global(struct cxlflash_cfg *cfg)
                msleep(100);
        }
 
+       if (afu_is_ocxl_lisn(afu)) {
+               /* Set up the LISN effective address for each master */
+               for (i = 0; i < afu->num_hwqs; i++) {
+                       hwq = get_hwq(afu, i);
+                       ctx = hwq->ctx_cookie;
+
+                       for (j = 0; j < hwq->num_irqs; j++) {
+                               reg = cfg->ops->get_irq_objhndl(ctx, j);
+                               writeq_be(reg, &hwq->ctrl_map->lisn_ea[j]);
+                       }
+
+                       reg = hwq->ctx_hndl;
+                       writeq_be(SISL_LISN_PASID(reg, reg),
+                                 &hwq->ctrl_map->lisn_pasid[0]);
+                       writeq_be(SISL_LISN_PASID(0UL, reg),
+                                 &hwq->ctrl_map->lisn_pasid[1]);
+               }
+       }
+
        /* Set up master's own CTX_CAP to allow real mode, host translation */
        /* tables, afu cmds and read/write GSCSI cmds. */
        /* First, unlock ctx_cap write by reading mbox */