sfc: Add support for SFC9000 family (1)

This adds support for the SFC9000 family of 10G Ethernet controllers
and LAN-on-motherboard chips, starting with the SFL9021 'Siena' and
SFC9020 'Bethpage'.

The SFC9000 family is based on the SFC4000 'Falcon' architecture, but
with some significant changes:

- Two ports are associated with two independent PCI functions
  (except SFC9010)
- Integrated 10GBASE-T PHY(s) (SFL9021/9022)
- MAC, PHY and board peripherals are managed by firmware
  - Driver does not require board-specific code
  - Firmware supports wake-on-LAN and lights-out management through NC-SI
- IPv6 checksum offload and RSS
- Filtering by MAC address and VLAN (not included in this code)
- PCI SR-IOV (not included in this code)

Credit for this code is largely due to my colleagues at Solarflare:

   Guido Barzini
   Steve Hodgson
   Kieran Mansley
   Matthew Slattery
   Neil Turton

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 130 insertions, 0 deletions

diff --git a/drivers/net/sfc/mcdi.h b/drivers/net/sfc/mcdi.h
new file mode 100644
index 00000000000..de916728c2e
--- /dev/null
+++ b/drivers/net/sfc/mcdi.h
@@ -0,0 +1,130 @@
+/****************************************************************************
+ * Driver for Solarflare Solarstorm network controllers and boards
+ * Copyright 2008-2009 Solarflare Communications Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation, incorporated herein by reference.
+ */
+
+#ifndef EFX_MCDI_H
+#define EFX_MCDI_H
+
+/**
+ * enum efx_mcdi_state
+ * @MCDI_STATE_QUIESCENT: No pending MCDI requests. If the caller holds the
+ *	mcdi_lock then they are able to move to MCDI_STATE_RUNNING
+ * @MCDI_STATE_RUNNING: There is an MCDI request pending. Only the thread that
+ *	moved into this state is allowed to move out of it.
+ * @MCDI_STATE_COMPLETED: An MCDI request has completed, but the owning thread
+ *	has not yet consumed the result. For all other threads, equivalent to
+ *	MCDI_STATE_RUNNING.
+ */
+enum efx_mcdi_state {
+	MCDI_STATE_QUIESCENT,
+	MCDI_STATE_RUNNING,
+	MCDI_STATE_COMPLETED,
+};
+
+enum efx_mcdi_mode {
+	MCDI_MODE_POLL,
+	MCDI_MODE_EVENTS,
+};
+
+/**
+ * struct efx_mcdi_iface
+ * @state: Interface state. Waited for by mcdi_wq.
+ * @wq: Wait queue for threads waiting for state != STATE_RUNNING
+ * @iface_lock: Protects @credits, @seqno, @resprc, @resplen
+ * @mode: Poll for mcdi completion, or wait for an mcdi_event.
+ *	Serialised by @lock
+ * @seqno: The next sequence number to use for mcdi requests.
+ *	Serialised by @lock
+ * @credits: Number of spurious MCDI completion events allowed before we
+ *	trigger a fatal error. Protected by @lock
+ * @resprc: Returned MCDI completion
+ * @resplen: Returned payload length
+ */
+struct efx_mcdi_iface {
+	atomic_t state;
+	wait_queue_head_t wq;
+	spinlock_t iface_lock;
+	enum efx_mcdi_mode mode;
+	unsigned int credits;
+	unsigned int seqno;
+	unsigned int resprc;
+	size_t resplen;
+};
+
+extern void efx_mcdi_init(struct efx_nic *efx);
+
+extern int efx_mcdi_rpc(struct efx_nic *efx, unsigned cmd, const u8 *inbuf,
+			size_t inlen, u8 *outbuf, size_t outlen,
+			size_t *outlen_actual);
+
+extern int efx_mcdi_poll_reboot(struct efx_nic *efx);
+extern void efx_mcdi_mode_poll(struct efx_nic *efx);
+extern void efx_mcdi_mode_event(struct efx_nic *efx);
+
+extern void efx_mcdi_process_event(struct efx_channel *channel,
+				   efx_qword_t *event);
+
+#define MCDI_PTR2(_buf, _ofst)						\
+	(((u8 *)_buf) + _ofst)
+#define MCDI_SET_DWORD2(_buf, _ofst, _value)				\
+	EFX_POPULATE_DWORD_1(*((efx_dword_t *)MCDI_PTR2(_buf, _ofst)),	\
+			     EFX_DWORD_0, _value)
+#define MCDI_DWORD2(_buf, _ofst)					\
+	EFX_DWORD_FIELD(*((efx_dword_t *)MCDI_PTR2(_buf, _ofst)),	\
+			EFX_DWORD_0)
+#define MCDI_QWORD2(_buf, _ofst)					\
+	EFX_QWORD_FIELD64(*((efx_qword_t *)MCDI_PTR2(_buf, _ofst)),	\
+			  EFX_QWORD_0)
+
+#define MCDI_PTR(_buf, _ofst)						\
+	MCDI_PTR2(_buf, MC_CMD_ ## _ofst ## _OFST)
+#define MCDI_SET_DWORD(_buf, _ofst, _value)				\
+	MCDI_SET_DWORD2(_buf, MC_CMD_ ## _ofst ## _OFST, _value)
+#define MCDI_DWORD(_buf, _ofst)						\
+	MCDI_DWORD2(_buf, MC_CMD_ ## _ofst ## _OFST)
+#define MCDI_QWORD(_buf, _ofst)						\
+	MCDI_QWORD2(_buf, MC_CMD_ ## _ofst ## _OFST)
+
+#define MCDI_EVENT_FIELD(_ev, _field)			\
+	EFX_QWORD_FIELD(_ev, MCDI_EVENT_ ## _field)
+
+extern int efx_mcdi_fwver(struct efx_nic *efx, u64 *version, u32 *build);
+extern int efx_mcdi_drv_attach(struct efx_nic *efx, bool driver_operating,
+			       bool *was_attached_out);
+extern int efx_mcdi_get_board_cfg(struct efx_nic *efx, u8 *mac_address,
+				  u16 *fw_subtype_list);
+extern int efx_mcdi_log_ctrl(struct efx_nic *efx, bool evq, bool uart,
+			     u32 dest_evq);
+extern int efx_mcdi_nvram_types(struct efx_nic *efx, u32 *nvram_types_out);
+extern int efx_mcdi_nvram_info(struct efx_nic *efx, unsigned int type,
+			       size_t *size_out, size_t *erase_size_out,
+			       bool *protected_out);
+extern int efx_mcdi_nvram_update_start(struct efx_nic *efx,
+				       unsigned int type);
+extern int efx_mcdi_nvram_read(struct efx_nic *efx, unsigned int type,
+			       loff_t offset, u8 *buffer, size_t length);
+extern int efx_mcdi_nvram_write(struct efx_nic *efx, unsigned int type,
+				loff_t offset, const u8 *buffer,
+				size_t length);
+extern int efx_mcdi_nvram_erase(struct efx_nic *efx, unsigned int type,
+				loff_t offset, size_t length);
+extern int efx_mcdi_nvram_update_finish(struct efx_nic *efx,
+					unsigned int type);
+extern int efx_mcdi_handle_assertion(struct efx_nic *efx);
+extern void efx_mcdi_set_id_led(struct efx_nic *efx, enum efx_led_mode mode);
+extern int efx_mcdi_reset_port(struct efx_nic *efx);
+extern int efx_mcdi_reset_mc(struct efx_nic *efx);
+extern int efx_mcdi_wol_filter_set(struct efx_nic *efx, u32 type,
+				   const u8 *mac, int *id_out);
+extern int efx_mcdi_wol_filter_set_magic(struct efx_nic *efx,
+					 const u8 *mac, int *id_out);
+extern int efx_mcdi_wol_filter_get_magic(struct efx_nic *efx, int *id_out);
+extern int efx_mcdi_wol_filter_remove(struct efx_nic *efx, int id);
+extern int efx_mcdi_wol_filter_reset(struct efx_nic *efx);
+
+#endif /* EFX_MCDI_H */