[PATCH v2 33/38] cxlflash: Setup LISNs for master contexts

Uma Krishnan
2018-02-26T22:24:27Z

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>
---
drivers/scsi/cxlflash/main.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)

diff --git a/drivers/scsi/cxlflash/main.c b/drivers/scsi/cxlflash/main.c
index 5d754d1..8c55fcd 100644
--- 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 */
--
2.1.0