From: Raju Rangoju <rajur@chelsio.com>
Date: Tue, 20 Mar 2018 15:41:40 +0530
Subject: cxgb4: Add support to query HW SRQ parameters
Patch-mainline: v4.17-rc1
Git-commit: c68644ef16103a2462c34e0691343d8985466eab
References: bsc#1097585 bsc#1097586 bsc#1097587 bsc#1097588 bsc#1097583 bsc#1097584

This patch adds support to query FW for the HW SRQ table start/end, and
advertise that for ULDs.

Signed-off-by: Raju Rangoju <rajur@chelsio.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c |   20 ++++++++++++++++++++
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.h  |    1 +
 2 files changed, 21 insertions(+)

--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -75,6 +75,7 @@
 #include "t4fw_api.h"
 #include "t4fw_version.h"
 #include "cxgb4_dcb.h"
+#include "srq.h"
 #include "cxgb4_debugfs.h"
 #include "clip_tbl.h"
 #include "l2t.h"
@@ -586,6 +587,10 @@ static int fwevtq_handler(struct sge_rsp
 		const struct cpl_abort_rpl_rss *p = (void *)rsp;
 
 		hash_del_filter_rpl(q->adap, p);
+	} else if (opcode == CPL_SRQ_TABLE_RPL) {
+		const struct cpl_srq_table_rpl *p = (void *)rsp;
+
+		do_srq_table_rpl(q->adap, p);
 	} else
 		dev_err(q->adap->pdev_dev,
 			"unexpected CPL %#x on FW event queue\n", opcode);
@@ -4440,6 +4445,20 @@ static int adap_init0(struct adapter *ad
 		adap->vres.pbl.start = val[4];
 		adap->vres.pbl.size = val[5] - val[4] + 1;
 
+		params[0] = FW_PARAM_PFVF(SRQ_START);
+		params[1] = FW_PARAM_PFVF(SRQ_END);
+		ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 2,
+				      params, val);
+		if (!ret) {
+			adap->vres.srq.start = val[0];
+			adap->vres.srq.size = val[1] - val[0] + 1;
+		}
+		if (adap->vres.srq.size) {
+			adap->srq = t4_init_srq(adap->vres.srq.size);
+			if (!adap->srq)
+				dev_warn(&adap->pdev->dev, "could not allocate SRQ, continuing\n");
+		}
+
 		params[0] = FW_PARAM_PFVF(SQRQ_START);
 		params[1] = FW_PARAM_PFVF(SQRQ_END);
 		params[2] = FW_PARAM_PFVF(CQ_START);
@@ -5108,6 +5127,7 @@ static void free_some_resources(struct a
 
 	kvfree(adapter->smt);
 	kvfree(adapter->l2t);
+	kvfree(adapter->srq);
 	t4_cleanup_sched(adapter);
 	kvfree(adapter->tids.tid_tab);
 	cxgb4_cleanup_tc_flower(adapter);
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.h
@@ -284,6 +284,7 @@ struct cxgb4_virt_res {
 	struct cxgb4_range iscsi;
 	struct cxgb4_range stag;
 	struct cxgb4_range rq;
+	struct cxgb4_range srq;
 	struct cxgb4_range pbl;
 	struct cxgb4_range qp;
 	struct cxgb4_range cq;