netdev - [PATCH net-next 1/3] nfp: extend capability and control words

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Date:   Wed,  7 Sep 2022 11:47:56 +0200
From:   Simon Horman <simon.horman@...igine.com>
To:     David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     netdev@...r.kernel.org, oss-drivers@...igine.com
Subject: [PATCH net-next 1/3] nfp: extend capability and control words

From: Yinjun Zhang <yinjun.zhang@...igine.com>

Currently the 32-bit capability word is almost exhausted, now
allocate some more words to support new features, and control
word is also extended accordingly. Packet-type offloading is
implemented in NIC application firmware, but it's not used in
kernel driver, so reserve this bit here in case it's redefined
for other use.

Signed-off-by: Yinjun Zhang <yinjun.zhang@...igine.com>
Reviewed-by: Louis Peens <louis.peens@...igine.com>
Signed-off-by: Simon Horman <simon.horman@...igine.com>
---
 drivers/net/ethernet/netronome/nfp/nfp_net.h       |  2 ++
 .../net/ethernet/netronome/nfp/nfp_net_common.c    |  1 +
 drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h  | 14 +++++++++++---
 3 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net.h b/drivers/net/ethernet/netronome/nfp/nfp_net.h
index a101ff30a1ae..0c3e7e2f856d 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net.h
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net.h
@@ -541,6 +541,7 @@ struct nfp_net_dp {
  * @id:			vNIC id within the PF (0 for VFs)
  * @fw_ver:		Firmware version
  * @cap:                Capabilities advertised by the Firmware
+ * @cap_w1:             Extended capabilities word advertised by the Firmware
  * @max_mtu:            Maximum support MTU advertised by the Firmware
  * @rss_hfunc:		RSS selected hash function
  * @rss_cfg:            RSS configuration
@@ -617,6 +618,7 @@ struct nfp_net {
 	u32 id;
 
 	u32 cap;
+	u32 cap_w1;
 	u32 max_mtu;
 
 	u8 rss_hfunc;
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
index 469c3939c306..7e4424d626a6 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
@@ -2456,6 +2456,7 @@ static int nfp_net_read_caps(struct nfp_net *nn)
 {
 	/* Get some of the read-only fields from the BAR */
 	nn->cap = nn_readl(nn, NFP_NET_CFG_CAP);
+	nn->cap_w1 = nn_readq(nn, NFP_NET_CFG_CAP_WORD1);
 	nn->max_mtu = nn_readl(nn, NFP_NET_CFG_MAX_MTU);
 
 	/* ABI 4.x and ctrl vNIC always use chained metadata, in other cases
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h b/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h
index 1d53f721a1c8..80346c1c266b 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h
@@ -254,10 +254,18 @@
 #define   NFP_NET_CFG_BPF_CFG_MASK	7ULL
 #define   NFP_NET_CFG_BPF_ADDR_MASK	(~NFP_NET_CFG_BPF_CFG_MASK)
 
-/* 40B reserved for future use (0x0098 - 0x00c0)
+/* 3 words reserved for extended ctrl words (0x0098 - 0x00a4)
+ * 3 words reserved for extended cap words (0x00a4 - 0x00b0)
+ * Currently only one word is used, can be extended in future.
  */
-#define NFP_NET_CFG_RESERVED		0x0098
-#define NFP_NET_CFG_RESERVED_SZ		0x0028
+#define NFP_NET_CFG_CTRL_WORD1		0x0098
+#define   NFP_NET_CFG_CTRL_PKT_TYPE	  (0x1 << 0) /* Pkttype offload */
+
+#define NFP_NET_CFG_CAP_WORD1		0x00a4
+
+/* 16B reserved for future use (0x00b0 - 0x00c0) */
+#define NFP_NET_CFG_RESERVED		0x00b0
+#define NFP_NET_CFG_RESERVED_SZ		0x0010
 
 /* RSS configuration (0x0100 - 0x01ac):
  * Used only when NFP_NET_CFG_CTRL_RSS is enabled
-- 
2.30.2