n1sdp: populate maximum credit send information in get_config

This patch sends the maximum credit send capability of Host's memory
request, snoop and data credits to the remote node which is required
for configuring credits in the End Point device.

Change-Id: Ic76363a80edcf18dc9ee126824c422df51c3155d
Signed-off-by: Chandni Cherukuri <chandni.cherukuri@arm.com>

4 files changed, 36 insertions, 0 deletions

diff --git a/module/cmn600/include/internal/cmn600_ccix.h b/module/cmn600/include/internal/cmn600_ccix.h
index e0fdc9a5..0a243cbb 100644
--- a/module/cmn600/include/internal/cmn600_ccix.h
+++ b/module/cmn600/include/internal/cmn600_ccix.h
@@ -37,6 +37,10 @@ int ccix_enter_system_coherency(struct cmn600_ctx *ctx, uint8_t link_id);
  */
 int ccix_enter_dvm_domain(struct cmn600_ctx *ctx, uint8_t link_id);
 
+/*
+ * CMN600 CCIX get Capabilities Function
+ */
+void ccix_capabilities_get(struct cmn600_ctx *ctx);
 
 /*
  * CCIX Gateway (CXG) protocol link control & status registers
@@ -171,6 +175,8 @@ struct cxg_wait_condition_data {
 #define CXG_RA_RND_RAID_VALID_REG_OFFSET          0xF38
 #define CXG_RA_AGENTID_TO_LINKID_OFFSET           0xE60
 #define CXG_RA_AGENTID_TO_LINKID_VAL_OFFSET       0xF20
+#define CXG_RA_REQUEST_TRACKER_DEPTH_MASK         UINT64_C(0x0000000001FF0000)
+#define CXG_RA_REQUEST_TRACKER_DEPTH_VAL          16
 
 /* CCIX Gateway (CXG) Home Agent (HA) defines */
 
@@ -180,6 +186,10 @@ struct cxg_wait_condition_data {
 #define CXG_HA_RAID_TO_LDID_VALID_OFFSET          (0xD08)
 #define CXG_HA_RAID_TO_LDID_RNF_MASK              (0x80)
 #define CXG_HA_LDID_TO_RAID_OFFSET                0xC00
+#define CXG_HA_SNOOP_TRACKER_DEPTH_MASK           UINT64_C(0x00001FF000000000)
+#define CXG_HA_SNOOP_TRACKER_DEPTH_VAL            36
+#define CXG_HA_WDB_DEPTH_MASK                     UINT64_C(0x0000000007FC0000)
+#define CXG_HA_WDB_DEPTH_VAL                      18
 
 /* CCIX Gateway (CXG) Link Agent (LA) defines */
 
diff --git a/module/cmn600/include/mod_cmn600.h b/module/cmn600/include/mod_cmn600.h
index 70d69f57..bba7f010 100644
--- a/module/cmn600/include/mod_cmn600.h
+++ b/module/cmn600/include/mod_cmn600.h
@@ -224,6 +224,14 @@ struct mod_cmn600_ccix_host_node_config {
     /*! CCIX HA memory map table for endpoints */
     struct mod_cmn600_ccix_ha_mmap ccix_host_mmap[MAX_HA_MMAP_ENTRIES];
 
+    /*! CCIX Maximum Memory Request send credits from Host */
+    uint16_t ccix_request_credits;
+
+    /*! CCIX Maximum Snoop send credits from Host */
+    uint16_t ccix_snoop_credits;
+
+    /*! CCIX Maximum Data send credits from Host */
+    uint16_t ccix_data_credits;
 };
 
 /*!
diff --git a/module/cmn600/src/cmn600_ccix.c b/module/cmn600/src/cmn600_ccix.c
index cd8213bc..b652aa46 100644
--- a/module/cmn600/src/cmn600_ccix.c
+++ b/module/cmn600/src/cmn600_ccix.c
@@ -601,3 +601,19 @@ int ccix_enter_dvm_domain(struct cmn600_ctx *ctx, uint8_t link_id)
     ctx->log_api->log(MOD_LOG_GROUP_DEBUG, "Done\n");
     return FWK_SUCCESS;
 }
+
+void ccix_capabilities_get(struct cmn600_ctx *ctx)
+{
+    /* Populate maximum credit send capability */
+    ctx->ccix_host_info.ccix_request_credits =
+        (ctx->cxg_ra_reg->CXG_RA_UNIT_INFO & CXG_RA_REQUEST_TRACKER_DEPTH_MASK)
+         >> CXG_RA_REQUEST_TRACKER_DEPTH_VAL;
+
+    ctx->ccix_host_info.ccix_snoop_credits =
+        (ctx->cxg_ha_reg->CXG_HA_UNIT_INFO & CXG_HA_SNOOP_TRACKER_DEPTH_MASK) >>
+         CXG_HA_SNOOP_TRACKER_DEPTH_VAL;
+
+    ctx->ccix_host_info.ccix_data_credits =
+        (ctx->cxg_ha_reg->CXG_HA_UNIT_INFO & CXG_HA_WDB_DEPTH_MASK) >>
+          CXG_HA_WDB_DEPTH_VAL;
+}
diff --git a/module/cmn600/src/mod_cmn600.c b/module/cmn600/src/mod_cmn600.c
index 03eccc9a..c98efa65 100644
--- a/module/cmn600/src/mod_cmn600.c
+++ b/module/cmn600/src/mod_cmn600.c
@@ -535,6 +535,8 @@ static int cmn600_ccix_config_get(
         ctx->internal_rnsam_count + ctx->external_rnsam_count - 1;
     ctx->ccix_host_info.host_sa_count = ctx->config->sa_count;
 
+    ccix_capabilities_get(ctx);
+
     memcpy((void *)config, (void *)&ctx->ccix_host_info,
         sizeof(struct mod_cmn600_ccix_host_node_config));
     return FWK_SUCCESS;