Merge branch 'eth-fbnic-add-network-driver-for-meta-platforms-host-network-interface'

Alexander Duyck says:

====================
eth: fbnic: Add network driver for Meta Platforms Host Network Interface

This patch set includes the necessary patches to enable basic Tx and Rx
over the Meta Platforms Host Network Interface. To do this we introduce a
new driver and driver directories in the form of
"drivers/net/ethernet/meta/fbnic".

The NIC itself is fairly simplistic. As far as speeds we support 25Gb,
50Gb, and 100Gb and we are mostly focused on speeds and feeds. As far as
future patch sets we will be supporting the basic Rx/Tx offloads such as
header/payload data split, TSO, checksum, and timestamp offloads. We have
access to the MAC and PCS from the NIC, however the PHY and QSFP are hidden
behind a FW layer as it is shared between 4 slices and the BMC.

Due to submission limits the general plan to submit a minimal driver for
now almost equivalent to a UEFI driver in functionality, and then follow up
over the coming months enabling additional offloads and enabling more
features for the device.
====================

Link: https://patch.msgid.link/172079913640.1778861.11459276843992867323.stgit@ahduyck-xeon-server.home.arpa
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 124 insertions, 0 deletions

diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_fw.h b/drivers/net/ethernet/meta/fbnic/fbnic_fw.h
new file mode 100644
index 000000000000..c65bca613665
--- /dev/null
+++ b/drivers/net/ethernet/meta/fbnic/fbnic_fw.h
@@ -0,0 +1,124 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (c) Meta Platforms, Inc. and affiliates. */
+
+#ifndef _FBNIC_FW_H_
+#define _FBNIC_FW_H_
+
+#include <linux/if_ether.h>
+#include <linux/types.h>
+
+struct fbnic_dev;
+struct fbnic_tlv_msg;
+
+struct fbnic_fw_mbx {
+	u8 ready, head, tail;
+	struct {
+		struct fbnic_tlv_msg	*msg;
+		dma_addr_t		addr;
+	} buf_info[FBNIC_IPC_MBX_DESC_LEN];
+};
+
+// FW_VER_MAX_SIZE must match ETHTOOL_FWVERS_LEN
+#define FBNIC_FW_VER_MAX_SIZE	                32
+// Formatted version is in the format XX.YY.ZZ_RRR_COMMIT
+#define FBNIC_FW_CAP_RESP_COMMIT_MAX_SIZE	(FBNIC_FW_VER_MAX_SIZE - 13)
+#define FBNIC_FW_LOG_MAX_SIZE	                256
+
+struct fbnic_fw_ver {
+	u32 version;
+	char commit[FBNIC_FW_CAP_RESP_COMMIT_MAX_SIZE];
+};
+
+struct fbnic_fw_cap {
+	struct {
+		struct fbnic_fw_ver mgmt, bootloader;
+	} running;
+	struct {
+		struct fbnic_fw_ver mgmt, bootloader, undi;
+	} stored;
+	u8	active_slot;
+	u8	bmc_mac_addr[4][ETH_ALEN];
+	u8	bmc_present	: 1;
+	u8	all_multi	: 1;
+	u8	link_speed;
+	u8	link_fec;
+};
+
+void fbnic_mbx_init(struct fbnic_dev *fbd);
+void fbnic_mbx_clean(struct fbnic_dev *fbd);
+void fbnic_mbx_poll(struct fbnic_dev *fbd);
+int fbnic_mbx_poll_tx_ready(struct fbnic_dev *fbd);
+void fbnic_mbx_flush_tx(struct fbnic_dev *fbd);
+int fbnic_fw_xmit_ownership_msg(struct fbnic_dev *fbd, bool take_ownership);
+int fbnic_fw_init_heartbeat(struct fbnic_dev *fbd, bool poll);
+void fbnic_fw_check_heartbeat(struct fbnic_dev *fbd);
+
+#define fbnic_mk_full_fw_ver_str(_rev_id, _delim, _commit, _str)	\
+do {									\
+	const u32 __rev_id = _rev_id;					\
+	snprintf(_str, sizeof(_str), "%02lu.%02lu.%02lu-%03lu%s%s",	\
+		 FIELD_GET(FBNIC_FW_CAP_RESP_VERSION_MAJOR, __rev_id),	\
+		 FIELD_GET(FBNIC_FW_CAP_RESP_VERSION_MINOR, __rev_id),	\
+		 FIELD_GET(FBNIC_FW_CAP_RESP_VERSION_PATCH, __rev_id),	\
+		 FIELD_GET(FBNIC_FW_CAP_RESP_VERSION_BUILD, __rev_id),	\
+		 _delim, _commit);					\
+} while (0)
+
+#define fbnic_mk_fw_ver_str(_rev_id, _str) \
+	fbnic_mk_full_fw_ver_str(_rev_id, "", "", _str)
+
+#define FW_HEARTBEAT_PERIOD		(10 * HZ)
+
+enum {
+	FBNIC_TLV_MSG_ID_HOST_CAP_REQ			= 0x10,
+	FBNIC_TLV_MSG_ID_FW_CAP_RESP			= 0x11,
+	FBNIC_TLV_MSG_ID_OWNERSHIP_REQ			= 0x12,
+	FBNIC_TLV_MSG_ID_OWNERSHIP_RESP			= 0x13,
+	FBNIC_TLV_MSG_ID_HEARTBEAT_REQ			= 0x14,
+	FBNIC_TLV_MSG_ID_HEARTBEAT_RESP			= 0x15,
+};
+
+#define FBNIC_FW_CAP_RESP_VERSION_MAJOR		CSR_GENMASK(31, 24)
+#define FBNIC_FW_CAP_RESP_VERSION_MINOR		CSR_GENMASK(23, 16)
+#define FBNIC_FW_CAP_RESP_VERSION_PATCH		CSR_GENMASK(15, 8)
+#define FBNIC_FW_CAP_RESP_VERSION_BUILD		CSR_GENMASK(7, 0)
+enum {
+	FBNIC_FW_CAP_RESP_VERSION			= 0x0,
+	FBNIC_FW_CAP_RESP_BMC_PRESENT			= 0x1,
+	FBNIC_FW_CAP_RESP_BMC_MAC_ADDR			= 0x2,
+	FBNIC_FW_CAP_RESP_BMC_MAC_ARRAY			= 0x3,
+	FBNIC_FW_CAP_RESP_STORED_VERSION		= 0x4,
+	FBNIC_FW_CAP_RESP_ACTIVE_FW_SLOT		= 0x5,
+	FBNIC_FW_CAP_RESP_VERSION_COMMIT_STR		= 0x6,
+	FBNIC_FW_CAP_RESP_BMC_ALL_MULTI			= 0x8,
+	FBNIC_FW_CAP_RESP_FW_STATE			= 0x9,
+	FBNIC_FW_CAP_RESP_FW_LINK_SPEED			= 0xa,
+	FBNIC_FW_CAP_RESP_FW_LINK_FEC			= 0xb,
+	FBNIC_FW_CAP_RESP_STORED_COMMIT_STR		= 0xc,
+	FBNIC_FW_CAP_RESP_CMRT_VERSION			= 0xd,
+	FBNIC_FW_CAP_RESP_STORED_CMRT_VERSION		= 0xe,
+	FBNIC_FW_CAP_RESP_CMRT_COMMIT_STR		= 0xf,
+	FBNIC_FW_CAP_RESP_STORED_CMRT_COMMIT_STR	= 0x10,
+	FBNIC_FW_CAP_RESP_UEFI_VERSION			= 0x11,
+	FBNIC_FW_CAP_RESP_UEFI_COMMIT_STR		= 0x12,
+	FBNIC_FW_CAP_RESP_MSG_MAX
+};
+
+enum {
+	FBNIC_FW_LINK_SPEED_25R1		= 1,
+	FBNIC_FW_LINK_SPEED_50R2		= 2,
+	FBNIC_FW_LINK_SPEED_50R1		= 3,
+	FBNIC_FW_LINK_SPEED_100R2		= 4,
+};
+
+enum {
+	FBNIC_FW_LINK_FEC_NONE			= 1,
+	FBNIC_FW_LINK_FEC_RS			= 2,
+	FBNIC_FW_LINK_FEC_BASER			= 3,
+};
+
+enum {
+	FBNIC_FW_OWNERSHIP_FLAG			= 0x0,
+	FBNIC_FW_OWNERSHIP_MSG_MAX
+};
+#endif /* _FBNIC_FW_H_ */