git: db15dbf88011 - main - cxgbe(4): Check if the firmware supports 512 SGL per FR MR.

[Navdeep Parhar]

The branch main has been updated by np:

URL: https://cgit.FreeBSD.org/src/commit/?id=db15dbf8801120241b7bfb6461341f2cb421ef8e

commit db15dbf8801120241b7bfb6461341f2cb421ef8e
Author:     Navdeep Parhar <np at FreeBSD.org>
AuthorDate: 2021-06-01 19:14:17 +0000
Commit:     Navdeep Parhar <np at FreeBSD.org>
CommitDate: 2021-06-01 21:38:31 +0000

    cxgbe(4): Check if the firmware supports 512 SGL per FR MR.
    
    Firmwares >= 1.25.6.0 support 512 SGL entries in a single memory
    registration request.
    
    Obtained from:  Chelsio Communications
    MFC after:      1 week
    Sponsored by:   Chelsio Communications
---
 sys/dev/cxgbe/common/common.h | 1 +
 sys/dev/cxgbe/t4_main.c       | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/sys/dev/cxgbe/common/common.h b/sys/dev/cxgbe/common/common.h
index 6264a7d6ec07..b803a7106a0c 100644
--- a/sys/dev/cxgbe/common/common.h
+++ b/sys/dev/cxgbe/common/common.h
@@ -405,6 +405,7 @@ struct adapter_params {
 
 	bool ulptx_memwrite_dsgl;	/* use of T5 DSGL allowed */
 	bool fr_nsmr_tpte_wr_support;	/* FW support for FR_NSMR_TPTE_WR */
+	bool dev_512sgl_mr;		/* FW support for 512 SGL per FR MR */
 	bool viid_smt_extn_support;	/* FW returns vin, vfvld & smt index? */
 	unsigned int max_pkts_per_eth_tx_pkts_wr;
 };
diff --git a/sys/dev/cxgbe/t4_main.c b/sys/dev/cxgbe/t4_main.c
index 51fc6504e5c2..650300c805a1 100644
--- a/sys/dev/cxgbe/t4_main.c
+++ b/sys/dev/cxgbe/t4_main.c
@@ -5222,6 +5222,14 @@ get_params__post_init(struct adapter *sc)
 	else
 		sc->params.fr_nsmr_tpte_wr_support = false;
 
+	/* Support for 512 SGL entries per FR MR. */
+	param[0] = FW_PARAM_DEV(DEV_512SGL_MR);
+	rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 1, param, val);
+	if (rc == 0)
+		sc->params.dev_512sgl_mr = val[0] != 0;
+	else
+		sc->params.dev_512sgl_mr = false;
+
 	param[0] = FW_PARAM_PFVF(MAX_PKTS_PER_ETH_TX_PKTS_WR);
 	rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 1, param, val);
 	if (rc == 0)