linux-kernel - [PATCH v2 02/14] net: ionic: Update LIF identity with additional RDMA capabilities

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Message-ID: <20250508045957.2823318-3-abhijit.gangurde@amd.com>
Date: Thu, 8 May 2025 10:29:45 +0530
From: Abhijit Gangurde <abhijit.gangurde@....com>
To: <shannon.nelson@....com>, <brett.creeley@....com>, <davem@...emloft.net>,
	<edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>,
	<corbet@....net>, <jgg@...pe.ca>, <leon@...nel.org>, <andrew+netdev@...n.ch>
CC: <allen.hubbe@....com>, <nikhil.agarwal@....com>,
	<linux-rdma@...r.kernel.org>, <netdev@...r.kernel.org>,
	<linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>, Abhijit Gangurde
	<abhijit.gangurde@....com>
Subject: [PATCH v2 02/14] net: ionic: Update LIF identity with additional RDMA capabilities

Firmware sends the RDMA capability in a response for LIF_IDENTIFY
device command. Update the LIF indentify with additional RDMA
capabilities used by driver and firmware.

Reviewed-by: Shannon Nelson <shannon.nelson@....com>
Signed-off-by: Abhijit Gangurde <abhijit.gangurde@....com>
---
 .../net/ethernet/pensando/ionic/ionic_if.h    | 29 +++++++++++++++----
 1 file changed, 24 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_if.h b/drivers/net/ethernet/pensando/ionic/ionic_if.h
index 830c8adbfbee..02cda3536dcb 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_if.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_if.h
@@ -494,6 +494,16 @@ union ionic_lif_config {
 	__le32 words[64];
 };
 
+/**
+ * enum ionic_lif_rdma_cap_stats - LIF stat type
+ * @IONIC_LIF_RDMA_STAT_GLOBAL:     Global stats
+ * @IONIC_LIF_RDMA_STAT_QP:         Queue pair stats
+ */
+enum ionic_lif_rdma_cap_stats {
+	IONIC_LIF_RDMA_STAT_GLOBAL = BIT(0),
+	IONIC_LIF_RDMA_STAT_QP = BIT(1),
+};
+
 /**
  * struct ionic_lif_identity - LIF identity information (type-specific)
  *
@@ -513,10 +523,10 @@ union ionic_lif_config {
  *	@eth.config:             LIF config struct with features, mtu, mac, q counts
  *
  * @rdma:                RDMA identify structure
- *	@rdma.version:         RDMA version of opcodes and queue descriptors
+ *	@rdma.version:         RDMA capability version
  *	@rdma.qp_opcodes:      Number of RDMA queue pair opcodes supported
  *	@rdma.admin_opcodes:   Number of RDMA admin opcodes supported
- *	@rdma.rsvd:            reserved byte(s)
+ *	@rdma.minor_version:   RDMA capability minor version
  *	@rdma.npts_per_lif:    Page table size per LIF
  *	@rdma.nmrs_per_lif:    Number of memory regions per LIF
  *	@rdma.nahs_per_lif:    Number of address handles per LIF
@@ -526,12 +536,17 @@ union ionic_lif_config {
  *	@rdma.rrq_stride:      Remote RQ work request stride
  *	@rdma.rsq_stride:      Remote SQ work request stride
  *	@rdma.dcqcn_profiles:  Number of DCQCN profiles
- *	@rdma.rsvd_dimensions: reserved byte(s)
+ *	@rdma.udma_shift:      Log2 number of queues per queue group
+ *	@rdma.rsvd_dimensions: Reserved byte
+ *	@rdma.page_size_cap:   Supported page sizes
  *	@rdma.aq_qtype:        RDMA Admin Qtype
  *	@rdma.sq_qtype:        RDMA Send Qtype
  *	@rdma.rq_qtype:        RDMA Receive Qtype
  *	@rdma.cq_qtype:        RDMA Completion Qtype
  *	@rdma.eq_qtype:        RDMA Event Qtype
+ *	@rdma.stats_type:      Supported statistics type
+ *	                       (enum ionic_lif_rdma_cap_stats)
+ *	@rdma.rsvd1:           Reserved byte(s)
  * @words:               word access to struct contents
  */
 union ionic_lif_identity {
@@ -557,7 +572,7 @@ union ionic_lif_identity {
 			u8 version;
 			u8 qp_opcodes;
 			u8 admin_opcodes;
-			u8 rsvd;
+			u8 minor_version;
 			__le32 npts_per_lif;
 			__le32 nmrs_per_lif;
 			__le32 nahs_per_lif;
@@ -567,12 +582,16 @@ union ionic_lif_identity {
 			u8 rrq_stride;
 			u8 rsq_stride;
 			u8 dcqcn_profiles;
-			u8 rsvd_dimensions[10];
+			u8 udma_shift;
+			u8 rsvd_dimensions;
+			__le64 page_size_cap;
 			struct ionic_lif_logical_qtype aq_qtype;
 			struct ionic_lif_logical_qtype sq_qtype;
 			struct ionic_lif_logical_qtype rq_qtype;
 			struct ionic_lif_logical_qtype cq_qtype;
 			struct ionic_lif_logical_qtype eq_qtype;
+			__le16 stats_type;
+			u8 rsvd1[162];
 		} __packed rdma;
 	} __packed;
 	__le32 words[478];
-- 
2.34.1