ionic: map PHC state page for user space access map the PHC page to allow applications to access hardware timestamp information. Signed-off-by: Allen Hubbe <allen.hubbe@amd.com> Signed-off-by: Abhijit Gangurde <abhijit.gangurde@amd.com>

diff --git a/providers/ionic/ionic.c b/providers/ionic/ionic.c
index a91fa19..6451aab 100644
--- a/providers/ionic/ionic.c
+++ b/providers/ionic/ionic.c

@@ -5,6 +5,7 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <sys/mman.h>
 
 #include "ionic.h"
 
@@ -86,6 +87,16 @@
 	}
 	ctx->dbpage = ctx->dbpage_page + (resp.dbell_offset & mask);
 
+	if (resp.phc_offset) {
+		ctx->phc_state = mmap(NULL, IONIC_PAGE_SIZE, PROT_READ, MAP_SHARED,
+				      cmd_fd, resp.phc_offset);
+		if (ctx->phc_state == MAP_FAILED) {
+			ctx->phc_state = NULL;
+			rc = errno;
+			goto err_phc;
+		}
+	}
+
 	pthread_mutex_init(&ctx->mut, NULL);
 	ionic_tbl_init(&ctx->qp_tbl);
 
@@ -98,6 +109,8 @@
 	verbs_debug(&ctx->vctx, "Attached to ctx %p", ctx);
 	return &ctx->vctx;
 
+err_phc:
+	ionic_unmap(ctx->dbpage_page, 1u << ctx->pg_shift);
 err_cmd:
 	verbs_uninit_context(&ctx->vctx);
 err_ctx:

diff --git a/providers/ionic/ionic.h b/providers/ionic/ionic.h
index 8a93197..2ac0959 100644
--- a/providers/ionic/ionic.h
+++ b/providers/ionic/ionic.h

@@ -103,6 +103,7 @@
 
 	void			*dbpage_page;
 	uint64_t		*dbpage;
+	struct ib_uverbs_clock_info	*phc_state;
 
 	pthread_mutex_t		mut;
 	struct ionic_tbl_root	qp_tbl;

diff --git a/providers/ionic/ionic_verbs.c b/providers/ionic/ionic_verbs.c
index b5abe74..53d22e9 100644
--- a/providers/ionic/ionic_verbs.c
+++ b/providers/ionic/ionic_verbs.c

@@ -3364,6 +3364,9 @@
 
 	pthread_mutex_destroy(&ctx->mut);
 
+	if (ctx->phc_state)
+		munmap(ctx->phc_state, IONIC_PAGE_SIZE);
+
 	ionic_unmap(ctx->dbpage_page, 1u << ctx->pg_shift);
 
 	verbs_uninit_context(&ctx->vctx);