sfc: Copy shared files needed for Siena (part 1)

These are the files starting with b through i.
No changes are done, those will be done with subsequent commits.
Signed-off-by: NMartin Habets <habetsm.xilinx@gmail.com>
Signed-off-by: NJakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/sfc/siena/efx.h

+/* SPDX-License-Identifier: GPL-2.0-only */
+/****************************************************************************
+ * Driver for Solarflare network controllers and boards
+ * Copyright 2005-2006 Fen Systems Ltd.
+ * Copyright 2006-2013 Solarflare Communications Inc.
+ */
+
+#ifndef EFX_EFX_H
+#define EFX_EFX_H
+
+#include <linux/indirect_call_wrapper.h>
+#include "net_driver.h"
+#include "ef100_rx.h"
+#include "ef100_tx.h"
+#include "filter.h"
+
+int efx_net_open(struct net_device *net_dev);
+int efx_net_stop(struct net_device *net_dev);
+
+/* TX */
+void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue);
+netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb,
+				struct net_device *net_dev);
+netdev_tx_t __efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb);
+static inline netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb)
+{
+	return INDIRECT_CALL_2(tx_queue->efx->type->tx_enqueue,
+			       ef100_enqueue_skb, __efx_enqueue_skb,
+			       tx_queue, skb);
+}
+void efx_xmit_done_single(struct efx_tx_queue *tx_queue);
+int efx_setup_tc(struct net_device *net_dev, enum tc_setup_type type,
+		 void *type_data);
+extern unsigned int efx_piobuf_size;
+
+/* RX */
+void __efx_rx_packet(struct efx_channel *channel);
+void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,
+		   unsigned int n_frags, unsigned int len, u16 flags);
+static inline void efx_rx_flush_packet(struct efx_channel *channel)
+{
+	if (channel->rx_pkt_n_frags)
+		INDIRECT_CALL_2(channel->efx->type->rx_packet,
+				__ef100_rx_packet, __efx_rx_packet,
+				channel);
+}
+static inline bool efx_rx_buf_hash_valid(struct efx_nic *efx, const u8 *prefix)
+{
+	if (efx->type->rx_buf_hash_valid)
+		return INDIRECT_CALL_1(efx->type->rx_buf_hash_valid,
+				       ef100_rx_buf_hash_valid,
+				       prefix);
+	return true;
+}
+
+/* Maximum number of TCP segments we support for soft-TSO */
+#define EFX_TSO_MAX_SEGS	100
+
+/* The smallest [rt]xq_entries that the driver supports.  RX minimum
+ * is a bit arbitrary.  For TX, we must have space for at least 2
+ * TSO skbs.
+ */
+#define EFX_RXQ_MIN_ENT		128U
+#define EFX_TXQ_MIN_ENT(efx)	(2 * efx_tx_max_skb_descs(efx))
+
+/* All EF10 architecture NICs steal one bit of the DMAQ size for various
+ * other purposes when counting TxQ entries, so we halve the queue size.
+ */
+#define EFX_TXQ_MAX_ENT(efx)	(EFX_WORKAROUND_EF10(efx) ? \
+				 EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE)
+
+static inline bool efx_rss_enabled(struct efx_nic *efx)
+{
+	return efx->rss_spread > 1;
+}
+
+/* Filters */
+
+/**
+ * efx_filter_insert_filter - add or replace a filter
+ * @efx: NIC in which to insert the filter
+ * @spec: Specification for the filter
+ * @replace_equal: Flag for whether the specified filter may replace an
+ *	existing filter with equal priority
+ *
+ * On success, return the filter ID.
+ * On failure, return a negative error code.
+ *
+ * If existing filters have equal match values to the new filter spec,
+ * then the new filter might replace them or the function might fail,
+ * as follows.
+ *
+ * 1. If the existing filters have lower priority, or @replace_equal
+ *    is set and they have equal priority, replace them.
+ *
+ * 2. If the existing filters have higher priority, return -%EPERM.
+ *
+ * 3. If !efx_filter_is_mc_recipient(@spec), or the NIC does not
+ *    support delivery to multiple recipients, return -%EEXIST.
+ *
+ * This implies that filters for multiple multicast recipients must
+ * all be inserted with the same priority and @replace_equal = %false.
+ */
+static inline s32 efx_filter_insert_filter(struct efx_nic *efx,
+					   struct efx_filter_spec *spec,
+					   bool replace_equal)
+{
+	return efx->type->filter_insert(efx, spec, replace_equal);
+}
+
+/**
+ * efx_filter_remove_id_safe - remove a filter by ID, carefully
+ * @efx: NIC from which to remove the filter
+ * @priority: Priority of filter, as passed to @efx_filter_insert_filter
+ * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
+ *
+ * This function will range-check @filter_id, so it is safe to call
+ * with a value passed from userland.
+ */
+static inline int efx_filter_remove_id_safe(struct efx_nic *efx,
+					    enum efx_filter_priority priority,
+					    u32 filter_id)
+{
+	return efx->type->filter_remove_safe(efx, priority, filter_id);
+}
+
+/**
+ * efx_filter_get_filter_safe - retrieve a filter by ID, carefully
+ * @efx: NIC from which to remove the filter
+ * @priority: Priority of filter, as passed to @efx_filter_insert_filter
+ * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
+ * @spec: Buffer in which to store filter specification
+ *
+ * This function will range-check @filter_id, so it is safe to call
+ * with a value passed from userland.
+ */
+static inline int
+efx_filter_get_filter_safe(struct efx_nic *efx,
+			   enum efx_filter_priority priority,
+			   u32 filter_id, struct efx_filter_spec *spec)
+{
+	return efx->type->filter_get_safe(efx, priority, filter_id, spec);
+}
+
+static inline u32 efx_filter_count_rx_used(struct efx_nic *efx,
+					   enum efx_filter_priority priority)
+{
+	return efx->type->filter_count_rx_used(efx, priority);
+}
+static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx)
+{
+	return efx->type->filter_get_rx_id_limit(efx);
+}
+static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx,
+					enum efx_filter_priority priority,
+					u32 *buf, u32 size)
+{
+	return efx->type->filter_get_rx_ids(efx, priority, buf, size);
+}
+
+/* RSS contexts */
+static inline bool efx_rss_active(struct efx_rss_context *ctx)
+{
+	return ctx->context_id != EFX_MCDI_RSS_CONTEXT_INVALID;
+}
+
+/* Ethtool support */
+extern const struct ethtool_ops efx_ethtool_ops;
+
+/* Global */
+unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs);
+unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks);
+int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
+			    unsigned int rx_usecs, bool rx_adaptive,
+			    bool rx_may_override_tx);
+void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
+			    unsigned int *rx_usecs, bool *rx_adaptive);
+
+/* Update the generic software stats in the passed stats array */
+void efx_update_sw_stats(struct efx_nic *efx, u64 *stats);
+
+/* MTD */
+#ifdef CONFIG_SFC_MTD
+int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts,
+		size_t n_parts, size_t sizeof_part);
+static inline int efx_mtd_probe(struct efx_nic *efx)
+{
+	return efx->type->mtd_probe(efx);
+}
+void efx_mtd_rename(struct efx_nic *efx);
+void efx_mtd_remove(struct efx_nic *efx);
+#else
+static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }
+static inline void efx_mtd_rename(struct efx_nic *efx) {}
+static inline void efx_mtd_remove(struct efx_nic *efx) {}
+#endif
+
+#ifdef CONFIG_SFC_SRIOV
+static inline unsigned int efx_vf_size(struct efx_nic *efx)
+{
+	return 1 << efx->vi_scale;
+}
+#endif
+
+static inline void efx_device_detach_sync(struct efx_nic *efx)
+{
+	struct net_device *dev = efx->net_dev;
+
+	/* Lock/freeze all TX queues so that we can be sure the
+	 * TX scheduler is stopped when we're done and before
+	 * netif_device_present() becomes false.
+	 */
+	netif_tx_lock_bh(dev);
+	netif_device_detach(dev);
+	netif_tx_unlock_bh(dev);
+}
+
+static inline void efx_device_attach_if_not_resetting(struct efx_nic *efx)
+{
+	if ((efx->state != STATE_DISABLED) && !efx->reset_pending)
+		netif_device_attach(efx->net_dev);
+}
+
+static inline bool efx_rwsem_assert_write_locked(struct rw_semaphore *sem)
+{
+	if (WARN_ON(down_read_trylock(sem))) {
+		up_read(sem);
+		return false;
+	}
+	return true;
+}
+
+int efx_xdp_tx_buffers(struct efx_nic *efx, int n, struct xdp_frame **xdpfs,
+		       bool flush);
+
+#endif /* EFX_EFX_H */

drivers/net/ethernet/sfc/siena/efx_channels.h

+/* SPDX-License-Identifier: GPL-2.0-only */
+/****************************************************************************
+ * Driver for Solarflare network controllers and boards
+ * Copyright 2018 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_CHANNELS_H
+#define EFX_CHANNELS_H
+
+extern unsigned int efx_interrupt_mode;
+extern unsigned int rss_cpus;
+
+int efx_probe_interrupts(struct efx_nic *efx);
+void efx_remove_interrupts(struct efx_nic *efx);
+int efx_soft_enable_interrupts(struct efx_nic *efx);
+void efx_soft_disable_interrupts(struct efx_nic *efx);
+int efx_enable_interrupts(struct efx_nic *efx);
+void efx_disable_interrupts(struct efx_nic *efx);
+
+void efx_set_interrupt_affinity(struct efx_nic *efx);
+void efx_clear_interrupt_affinity(struct efx_nic *efx);
+
+int efx_probe_eventq(struct efx_channel *channel);
+int efx_init_eventq(struct efx_channel *channel);
+void efx_start_eventq(struct efx_channel *channel);
+void efx_stop_eventq(struct efx_channel *channel);
+void efx_fini_eventq(struct efx_channel *channel);
+void efx_remove_eventq(struct efx_channel *channel);
+
+int efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries);
+void efx_set_channel_names(struct efx_nic *efx);
+int efx_init_channels(struct efx_nic *efx);
+int efx_probe_channels(struct efx_nic *efx);
+int efx_set_channels(struct efx_nic *efx);
+void efx_remove_channel(struct efx_channel *channel);
+void efx_remove_channels(struct efx_nic *efx);
+void efx_fini_channels(struct efx_nic *efx);
+void efx_start_channels(struct efx_nic *efx);
+void efx_stop_channels(struct efx_nic *efx);
+
+void efx_init_napi_channel(struct efx_channel *channel);
+void efx_init_napi(struct efx_nic *efx);
+void efx_fini_napi_channel(struct efx_channel *channel);
+void efx_fini_napi(struct efx_nic *efx);
+
+void efx_channel_dummy_op_void(struct efx_channel *channel);
+
+#endif

drivers/net/ethernet/sfc/siena/efx_common.h

+/* SPDX-License-Identifier: GPL-2.0-only */
+/****************************************************************************
+ * Driver for Solarflare network controllers and boards
+ * Copyright 2018 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_COMMON_H
+#define EFX_COMMON_H
+
+int efx_init_io(struct efx_nic *efx, int bar, dma_addr_t dma_mask,
+		unsigned int mem_map_size);
+void efx_fini_io(struct efx_nic *efx);
+int efx_init_struct(struct efx_nic *efx, struct pci_dev *pci_dev,
+		    struct net_device *net_dev);
+void efx_fini_struct(struct efx_nic *efx);
+
+#define EFX_MAX_DMAQ_SIZE 4096UL
+#define EFX_DEFAULT_DMAQ_SIZE 1024UL
+#define EFX_MIN_DMAQ_SIZE 512UL
+
+#define EFX_MAX_EVQ_SIZE 16384UL
+#define EFX_MIN_EVQ_SIZE 512UL
+
+void efx_link_clear_advertising(struct efx_nic *efx);
+void efx_link_set_wanted_fc(struct efx_nic *efx, u8);
+
+void efx_start_all(struct efx_nic *efx);
+void efx_stop_all(struct efx_nic *efx);
+
+void efx_net_stats(struct net_device *net_dev, struct rtnl_link_stats64 *stats);
+
+int efx_create_reset_workqueue(void);
+void efx_queue_reset_work(struct efx_nic *efx);
+void efx_flush_reset_workqueue(struct efx_nic *efx);
+void efx_destroy_reset_workqueue(void);
+
+void efx_start_monitor(struct efx_nic *efx);
+
+int __efx_reconfigure_port(struct efx_nic *efx);
+int efx_reconfigure_port(struct efx_nic *efx);
+
+#define EFX_ASSERT_RESET_SERIALISED(efx)		\
+	do {						\
+		if ((efx->state == STATE_READY) ||	\
+		    (efx->state == STATE_RECOVERY) ||	\
+		    (efx->state == STATE_DISABLED))	\
+			ASSERT_RTNL();			\
+	} while (0)
+
+int efx_try_recovery(struct efx_nic *efx);
+void efx_reset_down(struct efx_nic *efx, enum reset_type method);
+void efx_watchdog(struct net_device *net_dev, unsigned int txqueue);
+int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok);
+int efx_reset(struct efx_nic *efx, enum reset_type method);
+void efx_schedule_reset(struct efx_nic *efx, enum reset_type type);
+
+/* Dummy PHY ops for PHY drivers */
+int efx_port_dummy_op_int(struct efx_nic *efx);
+void efx_port_dummy_op_void(struct efx_nic *efx);
+
+static inline int efx_check_disabled(struct efx_nic *efx)
+{
+	if (efx->state == STATE_DISABLED || efx->state == STATE_RECOVERY) {
+		netif_err(efx, drv, efx->net_dev,
+			  "device is disabled due to earlier errors\n");
+		return -EIO;
+	}
+	return 0;
+}
+
+static inline void efx_schedule_channel(struct efx_channel *channel)
+{
+	netif_vdbg(channel->efx, intr, channel->efx->net_dev,
+		   "channel %d scheduling NAPI poll on CPU%d\n",
+		   channel->channel, raw_smp_processor_id());
+
+	napi_schedule(&channel->napi_str);
+}
+
+static inline void efx_schedule_channel_irq(struct efx_channel *channel)
+{
+	channel->event_test_cpu = raw_smp_processor_id();
+	efx_schedule_channel(channel);
+}
+
+#ifdef CONFIG_SFC_MCDI_LOGGING
+void efx_init_mcdi_logging(struct efx_nic *efx);
+void efx_fini_mcdi_logging(struct efx_nic *efx);
+#else
+static inline void efx_init_mcdi_logging(struct efx_nic *efx) {}
+static inline void efx_fini_mcdi_logging(struct efx_nic *efx) {}
+#endif
+
+void efx_mac_reconfigure(struct efx_nic *efx, bool mtu_only);
+int efx_set_mac_address(struct net_device *net_dev, void *data);
+void efx_set_rx_mode(struct net_device *net_dev);
+int efx_set_features(struct net_device *net_dev, netdev_features_t data);
+void efx_link_status_changed(struct efx_nic *efx);
+unsigned int efx_xdp_max_mtu(struct efx_nic *efx);
+int efx_change_mtu(struct net_device *net_dev, int new_mtu);
+
+extern const struct pci_error_handlers efx_err_handlers;
+
+netdev_features_t efx_features_check(struct sk_buff *skb, struct net_device *dev,
+				     netdev_features_t features);
+
+int efx_get_phys_port_id(struct net_device *net_dev,
+			 struct netdev_phys_item_id *ppid);
+
+int efx_get_phys_port_name(struct net_device *net_dev,
+			   char *name, size_t len);
+#endif

drivers/net/ethernet/sfc/siena/enum.h

+/* SPDX-License-Identifier: GPL-2.0-only */
+/****************************************************************************
+ * Driver for Solarflare network controllers and boards
+ * Copyright 2007-2013 Solarflare Communications Inc.
+ */
+
+#ifndef EFX_ENUM_H
+#define EFX_ENUM_H
+
+/**
+ * enum efx_loopback_mode - loopback modes
+ * @LOOPBACK_NONE: no loopback
+ * @LOOPBACK_DATA: data path loopback
+ * @LOOPBACK_GMAC: loopback within GMAC
+ * @LOOPBACK_XGMII: loopback after XMAC
+ * @LOOPBACK_XGXS: loopback within BPX after XGXS
+ * @LOOPBACK_XAUI: loopback within BPX before XAUI serdes
+ * @LOOPBACK_GMII: loopback within BPX after GMAC
+ * @LOOPBACK_SGMII: loopback within BPX within SGMII
+ * @LOOPBACK_XGBR: loopback within BPX within XGBR
+ * @LOOPBACK_XFI: loopback within BPX before XFI serdes
+ * @LOOPBACK_XAUI_FAR: loopback within BPX after XAUI serdes
+ * @LOOPBACK_GMII_FAR: loopback within BPX before SGMII
+ * @LOOPBACK_SGMII_FAR: loopback within BPX after SGMII
+ * @LOOPBACK_XFI_FAR: loopback after XFI serdes
+ * @LOOPBACK_GPHY: loopback within 1G PHY at unspecified level
+ * @LOOPBACK_PHYXS: loopback within 10G PHY at PHYXS level
+ * @LOOPBACK_PCS: loopback within 10G PHY at PCS level
+ * @LOOPBACK_PMAPMD: loopback within 10G PHY at PMAPMD level
+ * @LOOPBACK_XPORT: cross port loopback
+ * @LOOPBACK_XGMII_WS: wireside loopback excluding XMAC
+ * @LOOPBACK_XAUI_WS: wireside loopback within BPX within XAUI serdes
+ * @LOOPBACK_XAUI_WS_FAR: wireside loopback within BPX including XAUI serdes
+ * @LOOPBACK_XAUI_WS_NEAR: wireside loopback within BPX excluding XAUI serdes
+ * @LOOPBACK_GMII_WS: wireside loopback excluding GMAC
+ * @LOOPBACK_XFI_WS: wireside loopback excluding XFI serdes
+ * @LOOPBACK_XFI_WS_FAR: wireside loopback including XFI serdes
+ * @LOOPBACK_PHYXS_WS: wireside loopback within 10G PHY at PHYXS level
+ */
+/* Please keep up-to-date w.r.t the following two #defines */
+enum efx_loopback_mode {
+	LOOPBACK_NONE = 0,
+	LOOPBACK_DATA = 1,
+	LOOPBACK_GMAC = 2,
+	LOOPBACK_XGMII = 3,
+	LOOPBACK_XGXS = 4,
+	LOOPBACK_XAUI = 5,
+	LOOPBACK_GMII = 6,
+	LOOPBACK_SGMII = 7,
+	LOOPBACK_XGBR = 8,
+	LOOPBACK_XFI = 9,
+	LOOPBACK_XAUI_FAR = 10,
+	LOOPBACK_GMII_FAR = 11,
+	LOOPBACK_SGMII_FAR = 12,
+	LOOPBACK_XFI_FAR = 13,
+	LOOPBACK_GPHY = 14,
+	LOOPBACK_PHYXS = 15,
+	LOOPBACK_PCS = 16,
+	LOOPBACK_PMAPMD = 17,
+	LOOPBACK_XPORT = 18,
+	LOOPBACK_XGMII_WS = 19,
+	LOOPBACK_XAUI_WS = 20,
+	LOOPBACK_XAUI_WS_FAR = 21,
+	LOOPBACK_XAUI_WS_NEAR = 22,
+	LOOPBACK_GMII_WS = 23,
+	LOOPBACK_XFI_WS = 24,
+	LOOPBACK_XFI_WS_FAR = 25,
+	LOOPBACK_PHYXS_WS = 26,
+	LOOPBACK_MAX
+};
+#define LOOPBACK_TEST_MAX LOOPBACK_PMAPMD
+
+/* These loopbacks occur within the controller */
+#define LOOPBACKS_INTERNAL ((1 << LOOPBACK_DATA) |		\
+			    (1 << LOOPBACK_GMAC) |		\
+			    (1 << LOOPBACK_XGMII)|		\
+			    (1 << LOOPBACK_XGXS) |		\
+			    (1 << LOOPBACK_XAUI) |		\
+			    (1 << LOOPBACK_GMII) |		\
+			    (1 << LOOPBACK_SGMII) |		\
+			    (1 << LOOPBACK_XGBR) |		\
+			    (1 << LOOPBACK_XFI) |		\
+			    (1 << LOOPBACK_XAUI_FAR) |		\
+			    (1 << LOOPBACK_GMII_FAR) |		\
+			    (1 << LOOPBACK_SGMII_FAR) |		\
+			    (1 << LOOPBACK_XFI_FAR) |		\
+			    (1 << LOOPBACK_XGMII_WS) |		\
+			    (1 << LOOPBACK_XAUI_WS) |		\
+			    (1 << LOOPBACK_XAUI_WS_FAR) |	\
+			    (1 << LOOPBACK_XAUI_WS_NEAR) |	\
+			    (1 << LOOPBACK_GMII_WS) |		\
+			    (1 << LOOPBACK_XFI_WS) |		\
+			    (1 << LOOPBACK_XFI_WS_FAR))
+
+#define LOOPBACKS_WS ((1 << LOOPBACK_XGMII_WS) |		\
+		      (1 << LOOPBACK_XAUI_WS) |			\
+		      (1 << LOOPBACK_XAUI_WS_FAR) |		\
+		      (1 << LOOPBACK_XAUI_WS_NEAR) |		\
+		      (1 << LOOPBACK_GMII_WS) |			\
+		      (1 << LOOPBACK_XFI_WS) |			\
+		      (1 << LOOPBACK_XFI_WS_FAR) |		\
+		      (1 << LOOPBACK_PHYXS_WS))
+
+#define LOOPBACKS_EXTERNAL(_efx)					\
+	((_efx)->loopback_modes & ~LOOPBACKS_INTERNAL &			\
+	 ~(1 << LOOPBACK_NONE))
+
+#define LOOPBACK_MASK(_efx)			\
+	(1 << (_efx)->loopback_mode)
+
+#define LOOPBACK_INTERNAL(_efx)				\
+	(!!(LOOPBACKS_INTERNAL & LOOPBACK_MASK(_efx)))
+
+#define LOOPBACK_EXTERNAL(_efx)				\
+	(!!(LOOPBACK_MASK(_efx) & LOOPBACKS_EXTERNAL(_efx)))
+
+#define LOOPBACK_CHANGED(_from, _to, _mask)				\
+	(!!((LOOPBACK_MASK(_from) ^ LOOPBACK_MASK(_to)) & (_mask)))
+
+#define LOOPBACK_OUT_OF(_from, _to, _mask)				\
+	((LOOPBACK_MASK(_from) & (_mask)) && !(LOOPBACK_MASK(_to) & (_mask)))
+
+/*****************************************************************************/
+
+/**
+ * enum reset_type - reset types
+ *
+ * %RESET_TYPE_INVSIBLE, %RESET_TYPE_ALL, %RESET_TYPE_WORLD and
+ * %RESET_TYPE_DISABLE specify the method/scope of the reset.  The
+ * other valuesspecify reasons, which efx_schedule_reset() will choose
+ * a method for.
+ *
+ * Reset methods are numbered in order of increasing scope.
+ *
+ * @RESET_TYPE_INVISIBLE: Reset datapath and MAC (Falcon only)
+ * @RESET_TYPE_RECOVER_OR_ALL: Try to recover. Apply RESET_TYPE_ALL
+ * if unsuccessful.
+ * @RESET_TYPE_ALL: Reset datapath, MAC and PHY
+ * @RESET_TYPE_WORLD: Reset as much as possible
+ * @RESET_TYPE_RECOVER_OR_DISABLE: Try to recover. Apply RESET_TYPE_DISABLE if
+ * unsuccessful.
+ * @RESET_TYPE_DATAPATH: Reset datapath only.
+ * @RESET_TYPE_MC_BIST: MC entering BIST mode.
+ * @RESET_TYPE_DISABLE: Reset datapath, MAC and PHY; leave NIC disabled
+ * @RESET_TYPE_TX_WATCHDOG: reset due to TX watchdog
+ * @RESET_TYPE_INT_ERROR: reset due to internal error
+ * @RESET_TYPE_DMA_ERROR: DMA error
+ * @RESET_TYPE_TX_SKIP: hardware completed empty tx descriptors
+ * @RESET_TYPE_MC_FAILURE: MC reboot/assertion
+ * @RESET_TYPE_MCDI_TIMEOUT: MCDI timeout.
+ */
+enum reset_type {
+	RESET_TYPE_INVISIBLE,
+	RESET_TYPE_RECOVER_OR_ALL,
+	RESET_TYPE_ALL,
+	RESET_TYPE_WORLD,
+	RESET_TYPE_RECOVER_OR_DISABLE,
+	RESET_TYPE_DATAPATH,
+	RESET_TYPE_MC_BIST,
+	RESET_TYPE_DISABLE,
+	RESET_TYPE_MAX_METHOD,
+	RESET_TYPE_TX_WATCHDOG,
+	RESET_TYPE_INT_ERROR,
+	RESET_TYPE_DMA_ERROR,
+	RESET_TYPE_TX_SKIP,
+	RESET_TYPE_MC_FAILURE,
+	/* RESET_TYPE_MCDI_TIMEOUT is actually a method, not just a reason, but
+	 * it doesn't fit the scope hierarchy (not well-ordered by inclusion).
+	 * We encode this by having its enum value be greater than
+	 * RESET_TYPE_MAX_METHOD.
+	 */
+	RESET_TYPE_MCDI_TIMEOUT,
+	RESET_TYPE_MAX,
+};
+
+#endif /* EFX_ENUM_H */

drivers/net/ethernet/sfc/siena/ethtool.c

+// SPDX-License-Identifier: GPL-2.0-only
+/****************************************************************************
+ * Driver for Solarflare network controllers and boards
+ * Copyright 2005-2006 Fen Systems Ltd.
+ * Copyright 2006-2013 Solarflare Communications Inc.
+ */
+
+#include <linux/netdevice.h>
+#include <linux/ethtool.h>
+#include <linux/rtnetlink.h>
+#include <linux/in.h>
+#include "net_driver.h"
+#include "workarounds.h"
+#include "selftest.h"
+#include "efx.h"
+#include "efx_channels.h"
+#include "rx_common.h"
+#include "tx_common.h"
+#include "ethtool_common.h"
+#include "filter.h"
+#include "nic.h"
+
+#define EFX_ETHTOOL_EEPROM_MAGIC 0xEFAB
+
+/**************************************************************************
+ *
+ * Ethtool operations
+ *
+ **************************************************************************
+ */
+
+/* Identify device by flashing LEDs */
+static int efx_ethtool_phys_id(struct net_device *net_dev,
+			       enum ethtool_phys_id_state state)
+{
+	struct efx_nic *efx = netdev_priv(net_dev);
+	enum efx_led_mode mode = EFX_LED_DEFAULT;
+
+	switch (state) {
+	case ETHTOOL_ID_ON:
+		mode = EFX_LED_ON;
+		break;
+	case ETHTOOL_ID_OFF:
+		mode = EFX_LED_OFF;
+		break;
+	case ETHTOOL_ID_INACTIVE:
+		mode = EFX_LED_DEFAULT;
+		break;
+	case ETHTOOL_ID_ACTIVE:
+		return 1;	/* cycle on/off once per second */
+	}
+
+	return efx_mcdi_set_id_led(efx, mode);
+}
+
+static int efx_ethtool_get_regs_len(struct net_device *net_dev)
+{
+	return efx_nic_get_regs_len(netdev_priv(net_dev));
+}
+
+static void efx_ethtool_get_regs(struct net_device *net_dev,
+				 struct ethtool_regs *regs, void *buf)
+{
+	struct efx_nic *efx = netdev_priv(net_dev);
+
+	regs->version = efx->type->revision;
+	efx_nic_get_regs(efx, buf);
+}
+
+/*
+ * Each channel has a single IRQ and moderation timer, started by any
+ * completion (or other event).  Unless the module parameter
+ * separate_tx_channels is set, IRQs and moderation are therefore
+ * shared between RX and TX completions.  In this case, when RX IRQ
+ * moderation is explicitly changed then TX IRQ moderation is
+ * automatically changed too, but otherwise we fail if the two values
+ * are requested to be different.
+ *
+ * The hardware does not support a limit on the number of completions
+ * before an IRQ, so we do not use the max_frames fields.  We should
+ * report and require that max_frames == (usecs != 0), but this would
+ * invalidate existing user documentation.
+ *
+ * The hardware does not have distinct settings for interrupt
+ * moderation while the previous IRQ is being handled, so we should
+ * not use the 'irq' fields.  However, an earlier developer
+ * misunderstood the meaning of the 'irq' fields and the driver did
+ * not support the standard fields.  To avoid invalidating existing
+ * user documentation, we report and accept changes through either the
+ * standard or 'irq' fields.  If both are changed at the same time, we
+ * prefer the standard field.
+ *
+ * We implement adaptive IRQ moderation, but use a different algorithm
+ * from that assumed in the definition of struct ethtool_coalesce.
+ * Therefore we do not use any of the adaptive moderation parameters
+ * in it.
+ */
+
+static int efx_ethtool_get_coalesce(struct net_device *net_dev,
+				    struct ethtool_coalesce *coalesce,
+				    struct kernel_ethtool_coalesce *kernel_coal,
+				    struct netlink_ext_ack *extack)
+{
+	struct efx_nic *efx = netdev_priv(net_dev);
+	unsigned int tx_usecs, rx_usecs;
+	bool rx_adaptive;
+
+	efx_get_irq_moderation(efx, &tx_usecs, &rx_usecs, &rx_adaptive);
+
+	coalesce->tx_coalesce_usecs = tx_usecs;
+	coalesce->tx_coalesce_usecs_irq = tx_usecs;
+	coalesce->rx_coalesce_usecs = rx_usecs;
+	coalesce->rx_coalesce_usecs_irq = rx_usecs;
+	coalesce->use_adaptive_rx_coalesce = rx_adaptive;
+
+	return 0;
+}
+
+static int efx_ethtool_set_coalesce(struct net_device *net_dev,
+				    struct ethtool_coalesce *coalesce,
+				    struct kernel_ethtool_coalesce *kernel_coal,
+				    struct netlink_ext_ack *extack)
+{
+	struct efx_nic *efx = netdev_priv(net_dev);
+	struct efx_channel *channel;
+	unsigned int tx_usecs, rx_usecs;
+	bool adaptive, rx_may_override_tx;
+	int rc;
+
+	efx_get_irq_moderation(efx, &tx_usecs, &rx_usecs, &adaptive);
+
+	if (coalesce->rx_coalesce_usecs != rx_usecs)
+		rx_usecs = coalesce->rx_coalesce_usecs;
+	else
+		rx_usecs = coalesce->rx_coalesce_usecs_irq;
+
+	adaptive = coalesce->use_adaptive_rx_coalesce;
+
+	/* If channels are shared, TX IRQ moderation can be quietly
+	 * overridden unless it is changed from its old value.
+	 */
+	rx_may_override_tx = (coalesce->tx_coalesce_usecs == tx_usecs &&
+			      coalesce->tx_coalesce_usecs_irq == tx_usecs);
+	if (coalesce->tx_coalesce_usecs != tx_usecs)
+		tx_usecs = coalesce->tx_coalesce_usecs;
+	else
+		tx_usecs = coalesce->tx_coalesce_usecs_irq;
+
+	rc = efx_init_irq_moderation(efx, tx_usecs, rx_usecs, adaptive,
+				     rx_may_override_tx);
+	if (rc != 0)
+		return rc;
+
+	efx_for_each_channel(channel, efx)
+		efx->type->push_irq_moderation(channel);
+
+	return 0;
+}
+
+static void
+efx_ethtool_get_ringparam(struct net_device *net_dev,
+			  struct ethtool_ringparam *ring,
+			  struct kernel_ethtool_ringparam *kernel_ring,
+			  struct netlink_ext_ack *extack)
+{
+	struct efx_nic *efx = netdev_priv(net_dev);
+
+	ring->rx_max_pending = EFX_MAX_DMAQ_SIZE;
+	ring->tx_max_pending = EFX_TXQ_MAX_ENT(efx);
+	ring->rx_pending = efx->rxq_entries;
+	ring->tx_pending = efx->txq_entries;
+}
+
+static int
+efx_ethtool_set_ringparam(struct net_device *net_dev,
+			  struct ethtool_ringparam *ring,
+			  struct kernel_ethtool_ringparam *kernel_ring,
+			  struct netlink_ext_ack *extack)
+{
+	struct efx_nic *efx = netdev_priv(net_dev);
+	u32 txq_entries;
+
+	if (ring->rx_mini_pending || ring->rx_jumbo_pending ||
+	    ring->rx_pending > EFX_MAX_DMAQ_SIZE ||
+	    ring->tx_pending > EFX_TXQ_MAX_ENT(efx))
+		return -EINVAL;
+
+	if (ring->rx_pending < EFX_RXQ_MIN_ENT) {
+		netif_err(efx, drv, efx->net_dev,
+			  "RX queues cannot be smaller than %u\n",
+			  EFX_RXQ_MIN_ENT);
+		return -EINVAL;
+	}
+
+	txq_entries = max(ring->tx_pending, EFX_TXQ_MIN_ENT(efx));
+	if (txq_entries != ring->tx_pending)
+		netif_warn(efx, drv, efx->net_dev,
+			   "increasing TX queue size to minimum of %u\n",
+			   txq_entries);
+
+	return efx_realloc_channels(efx, ring->rx_pending, txq_entries);
+}
+
+static void efx_ethtool_get_wol(struct net_device *net_dev,
+				struct ethtool_wolinfo *wol)
+{
+	struct efx_nic *efx = netdev_priv(net_dev);
+	return efx->type->get_wol(efx, wol);
+}
+
+
+static int efx_ethtool_set_wol(struct net_device *net_dev,
+			       struct ethtool_wolinfo *wol)
+{
+	struct efx_nic *efx = netdev_priv(net_dev);
+	return efx->type->set_wol(efx, wol->wolopts);
+}
+
+static void efx_ethtool_get_fec_stats(struct net_device *net_dev,
+				      struct ethtool_fec_stats *fec_stats)
+{
+	struct efx_nic *efx = netdev_priv(net_dev);
+
+	if (efx->type->get_fec_stats)
+		efx->type->get_fec_stats(efx, fec_stats);
+}
+
+static int efx_ethtool_get_ts_info(struct net_device *net_dev,
+				   struct ethtool_ts_info *ts_info)
+{
+	struct efx_nic *efx = netdev_priv(net_dev);
+
+	/* Software capabilities */
+	ts_info->so_timestamping = (SOF_TIMESTAMPING_RX_SOFTWARE |
+				    SOF_TIMESTAMPING_SOFTWARE);
+	ts_info->phc_index = -1;
+
+	efx_ptp_get_ts_info(efx, ts_info);
+	return 0;
+}
+
+const struct ethtool_ops efx_ethtool_ops = {
+	.supported_coalesce_params = ETHTOOL_COALESCE_USECS |
+				     ETHTOOL_COALESCE_USECS_IRQ |
+				     ETHTOOL_COALESCE_USE_ADAPTIVE_RX,
+	.get_drvinfo		= efx_ethtool_get_drvinfo,
+	.get_regs_len		= efx_ethtool_get_regs_len,
+	.get_regs		= efx_ethtool_get_regs,
+	.get_msglevel		= efx_ethtool_get_msglevel,
+	.set_msglevel		= efx_ethtool_set_msglevel,
+	.get_link		= ethtool_op_get_link,
+	.get_coalesce		= efx_ethtool_get_coalesce,
+	.set_coalesce		= efx_ethtool_set_coalesce,
+	.get_ringparam		= efx_ethtool_get_ringparam,
+	.set_ringparam		= efx_ethtool_set_ringparam,
+	.get_pauseparam         = efx_ethtool_get_pauseparam,
+	.set_pauseparam         = efx_ethtool_set_pauseparam,
+	.get_sset_count		= efx_ethtool_get_sset_count,
+	.self_test		= efx_ethtool_self_test,
+	.get_strings		= efx_ethtool_get_strings,
+	.set_phys_id		= efx_ethtool_phys_id,
+	.get_ethtool_stats	= efx_ethtool_get_stats,
+	.get_wol                = efx_ethtool_get_wol,
+	.set_wol                = efx_ethtool_set_wol,
+	.reset			= efx_ethtool_reset,
+	.get_rxnfc		= efx_ethtool_get_rxnfc,
+	.set_rxnfc		= efx_ethtool_set_rxnfc,
+	.get_rxfh_indir_size	= efx_ethtool_get_rxfh_indir_size,
+	.get_rxfh_key_size	= efx_ethtool_get_rxfh_key_size,
+	.get_rxfh		= efx_ethtool_get_rxfh,
+	.set_rxfh		= efx_ethtool_set_rxfh,
+	.get_rxfh_context	= efx_ethtool_get_rxfh_context,
+	.set_rxfh_context	= efx_ethtool_set_rxfh_context,
+	.get_ts_info		= efx_ethtool_get_ts_info,
+	.get_module_info	= efx_ethtool_get_module_info,
+	.get_module_eeprom	= efx_ethtool_get_module_eeprom,
+	.get_link_ksettings	= efx_ethtool_get_link_ksettings,
+	.set_link_ksettings	= efx_ethtool_set_link_ksettings,
+	.get_fec_stats		= efx_ethtool_get_fec_stats,
+	.get_fecparam		= efx_ethtool_get_fecparam,
+	.set_fecparam		= efx_ethtool_set_fecparam,
+};

drivers/net/ethernet/sfc/siena/ethtool_common.h

+/* SPDX-License-Identifier: GPL-2.0-only */
+/****************************************************************************
+ * Driver for Solarflare network controllers and boards
+ * Copyright 2019 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_ETHTOOL_COMMON_H
+#define EFX_ETHTOOL_COMMON_H
+
+void efx_ethtool_get_drvinfo(struct net_device *net_dev,
+			     struct ethtool_drvinfo *info);
+u32 efx_ethtool_get_msglevel(struct net_device *net_dev);
+void efx_ethtool_set_msglevel(struct net_device *net_dev, u32 msg_enable);
+void efx_ethtool_self_test(struct net_device *net_dev,
+			   struct ethtool_test *test, u64 *data);
+void efx_ethtool_get_pauseparam(struct net_device *net_dev,
+				struct ethtool_pauseparam *pause);
+int efx_ethtool_set_pauseparam(struct net_device *net_dev,
+			       struct ethtool_pauseparam *pause);
+int efx_ethtool_fill_self_tests(struct efx_nic *efx,
+				struct efx_self_tests *tests,
+				u8 *strings, u64 *data);
+int efx_ethtool_get_sset_count(struct net_device *net_dev, int string_set);
+void efx_ethtool_get_strings(struct net_device *net_dev, u32 string_set,
+			     u8 *strings);
+void efx_ethtool_get_stats(struct net_device *net_dev,
+			   struct ethtool_stats *stats __attribute__ ((unused)),
+			   u64 *data);
+int efx_ethtool_get_link_ksettings(struct net_device *net_dev,
+				   struct ethtool_link_ksettings *out);
+int efx_ethtool_set_link_ksettings(struct net_device *net_dev,
+				   const struct ethtool_link_ksettings *settings);
+int efx_ethtool_get_fecparam(struct net_device *net_dev,
+			     struct ethtool_fecparam *fecparam);
+int efx_ethtool_set_fecparam(struct net_device *net_dev,
+			     struct ethtool_fecparam *fecparam);
+int efx_ethtool_get_rxnfc(struct net_device *net_dev,
+			  struct ethtool_rxnfc *info, u32 *rule_locs);
+int efx_ethtool_set_rxnfc(struct net_device *net_dev,
+			  struct ethtool_rxnfc *info);
+u32 efx_ethtool_get_rxfh_indir_size(struct net_device *net_dev);
+u32 efx_ethtool_get_rxfh_key_size(struct net_device *net_dev);
+int efx_ethtool_get_rxfh(struct net_device *net_dev, u32 *indir, u8 *key,
+			 u8 *hfunc);
+int efx_ethtool_set_rxfh(struct net_device *net_dev,
+			 const u32 *indir, const u8 *key, const u8 hfunc);
+int efx_ethtool_get_rxfh_context(struct net_device *net_dev, u32 *indir,
+				 u8 *key, u8 *hfunc, u32 rss_context);
+int efx_ethtool_set_rxfh_context(struct net_device *net_dev,
+				 const u32 *indir, const u8 *key,
+				 const u8 hfunc, u32 *rss_context,
+				 bool delete);
+int efx_ethtool_reset(struct net_device *net_dev, u32 *flags);
+int efx_ethtool_get_module_eeprom(struct net_device *net_dev,
+				  struct ethtool_eeprom *ee,
+				  u8 *data);
+int efx_ethtool_get_module_info(struct net_device *net_dev,
+				struct ethtool_modinfo *modinfo);
+#endif

drivers/net/ethernet/sfc/siena/filter.h

+/* SPDX-License-Identifier: GPL-2.0-only */
+/****************************************************************************
+ * Driver for Solarflare network controllers and boards
+ * Copyright 2005-2013 Solarflare Communications Inc.
+ */
+
+#ifndef EFX_FILTER_H
+#define EFX_FILTER_H
+
+#include <linux/types.h>
+#include <linux/if_ether.h>
+#include <asm/byteorder.h>
+
+/**
+ * enum efx_filter_match_flags - Flags for hardware filter match type
+ * @EFX_FILTER_MATCH_REM_HOST: Match by remote IP host address
+ * @EFX_FILTER_MATCH_LOC_HOST: Match by local IP host address
+ * @EFX_FILTER_MATCH_REM_MAC: Match by remote MAC address
+ * @EFX_FILTER_MATCH_REM_PORT: Match by remote TCP/UDP port
+ * @EFX_FILTER_MATCH_LOC_MAC: Match by local MAC address
+ * @EFX_FILTER_MATCH_LOC_PORT: Match by local TCP/UDP port
+ * @EFX_FILTER_MATCH_ETHER_TYPE: Match by Ether-type
+ * @EFX_FILTER_MATCH_INNER_VID: Match by inner VLAN ID
+ * @EFX_FILTER_MATCH_OUTER_VID: Match by outer VLAN ID
+ * @EFX_FILTER_MATCH_IP_PROTO: Match by IP transport protocol
+ * @EFX_FILTER_MATCH_LOC_MAC_IG: Match by local MAC address I/G bit.
+ * @EFX_FILTER_MATCH_ENCAP_TYPE: Match by encapsulation type.
+ *	Used for RX default unicast and multicast/broadcast filters.
+ *
+ * Only some combinations are supported, depending on NIC type:
+ *
+ * - Falcon supports RX filters matching by {TCP,UDP}/IPv4 4-tuple or
+ *   local 2-tuple (only implemented for Falcon B0)
+ *
+ * - Siena supports RX and TX filters matching by {TCP,UDP}/IPv4 4-tuple
+ *   or local 2-tuple, or local MAC with or without outer VID, and RX
+ *   default filters
+ *
+ * - Huntington supports filter matching controlled by firmware, potentially
+ *   using {TCP,UDP}/IPv{4,6} 4-tuple or local 2-tuple, local MAC or I/G bit,
+ *   with or without outer and inner VID
+ */
+enum efx_filter_match_flags {
+	EFX_FILTER_MATCH_REM_HOST =	0x0001,
+	EFX_FILTER_MATCH_LOC_HOST =	0x0002,
+	EFX_FILTER_MATCH_REM_MAC =	0x0004,
+	EFX_FILTER_MATCH_REM_PORT =	0x0008,
+	EFX_FILTER_MATCH_LOC_MAC =	0x0010,
+	EFX_FILTER_MATCH_LOC_PORT =	0x0020,
+	EFX_FILTER_MATCH_ETHER_TYPE =	0x0040,
+	EFX_FILTER_MATCH_INNER_VID =	0x0080,
+	EFX_FILTER_MATCH_OUTER_VID =	0x0100,
+	EFX_FILTER_MATCH_IP_PROTO =	0x0200,
+	EFX_FILTER_MATCH_LOC_MAC_IG =	0x0400,
+	EFX_FILTER_MATCH_ENCAP_TYPE =	0x0800,
+};
+
+/**
+ * enum efx_filter_priority - priority of a hardware filter specification
+ * @EFX_FILTER_PRI_HINT: Performance hint
+ * @EFX_FILTER_PRI_AUTO: Automatic filter based on device address list
+ *	or hardware requirements.  This may only be used by the filter
+ *	implementation for each NIC type.
+ * @EFX_FILTER_PRI_MANUAL: Manually configured filter
+ * @EFX_FILTER_PRI_REQUIRED: Required for correct behaviour (user-level
+ *	networking and SR-IOV)
+ */
+enum efx_filter_priority {
+	EFX_FILTER_PRI_HINT = 0,
+	EFX_FILTER_PRI_AUTO,
+	EFX_FILTER_PRI_MANUAL,
+	EFX_FILTER_PRI_REQUIRED,
+};
+
+/**
+ * enum efx_filter_flags - flags for hardware filter specifications
+ * @EFX_FILTER_FLAG_RX_RSS: Use RSS to spread across multiple queues.
+ *	By default, matching packets will be delivered only to the
+ *	specified queue. If this flag is set, they will be delivered
+ *	to a range of queues offset from the specified queue number
+ *	according to the indirection table.
+ * @EFX_FILTER_FLAG_RX_SCATTER: Enable DMA scatter on the receiving
+ *	queue.
+ * @EFX_FILTER_FLAG_RX_OVER_AUTO: Indicates a filter that is
+ *	overriding an automatic filter (priority
+ *	%EFX_FILTER_PRI_AUTO).  This may only be set by the filter
+ *	implementation for each type.  A removal request will restore
+ *	the automatic filter in its place.
+ * @EFX_FILTER_FLAG_RX: Filter is for RX
+ * @EFX_FILTER_FLAG_TX: Filter is for TX
+ */
+enum efx_filter_flags {
+	EFX_FILTER_FLAG_RX_RSS = 0x01,
+	EFX_FILTER_FLAG_RX_SCATTER = 0x02,
+	EFX_FILTER_FLAG_RX_OVER_AUTO = 0x04,
+	EFX_FILTER_FLAG_RX = 0x08,
+	EFX_FILTER_FLAG_TX = 0x10,
+};
+
+/** enum efx_encap_type - types of encapsulation
+ * @EFX_ENCAP_TYPE_NONE: no encapsulation
+ * @EFX_ENCAP_TYPE_VXLAN: VXLAN encapsulation
+ * @EFX_ENCAP_TYPE_NVGRE: NVGRE encapsulation
+ * @EFX_ENCAP_TYPE_GENEVE: GENEVE encapsulation
+ * @EFX_ENCAP_FLAG_IPV6: indicates IPv6 outer frame
+ *
+ * Contains both enumerated types and flags.
+ * To get just the type, OR with @EFX_ENCAP_TYPES_MASK.
+ */
+enum efx_encap_type {
+	EFX_ENCAP_TYPE_NONE = 0,
+	EFX_ENCAP_TYPE_VXLAN = 1,
+	EFX_ENCAP_TYPE_NVGRE = 2,
+	EFX_ENCAP_TYPE_GENEVE = 3,
+
+	EFX_ENCAP_TYPES_MASK = 7,
+	EFX_ENCAP_FLAG_IPV6 = 8,
+};
+
+/**
+ * struct efx_filter_spec - specification for a hardware filter
+ * @match_flags: Match type flags, from &enum efx_filter_match_flags
+ * @priority: Priority of the filter, from &enum efx_filter_priority
+ * @flags: Miscellaneous flags, from &enum efx_filter_flags
+ * @rss_context: RSS context to use, if %EFX_FILTER_FLAG_RX_RSS is set.  This
+ *	is a user_id (with 0 meaning the driver/default RSS context), not an
+ *	MCFW context_id.
+ * @dmaq_id: Source/target queue index, or %EFX_FILTER_RX_DMAQ_ID_DROP for
+ *	an RX drop filter
+ * @outer_vid: Outer VLAN ID to match, if %EFX_FILTER_MATCH_OUTER_VID is set
+ * @inner_vid: Inner VLAN ID to match, if %EFX_FILTER_MATCH_INNER_VID is set
+ * @loc_mac: Local MAC address to match, if %EFX_FILTER_MATCH_LOC_MAC or
+ *	%EFX_FILTER_MATCH_LOC_MAC_IG is set
+ * @rem_mac: Remote MAC address to match, if %EFX_FILTER_MATCH_REM_MAC is set
+ * @ether_type: Ether-type to match, if %EFX_FILTER_MATCH_ETHER_TYPE is set
+ * @ip_proto: IP transport protocol to match, if %EFX_FILTER_MATCH_IP_PROTO
+ *	is set
+ * @loc_host: Local IP host to match, if %EFX_FILTER_MATCH_LOC_HOST is set
+ * @rem_host: Remote IP host to match, if %EFX_FILTER_MATCH_REM_HOST is set
+ * @loc_port: Local TCP/UDP port to match, if %EFX_FILTER_MATCH_LOC_PORT is set
+ * @rem_port: Remote TCP/UDP port to match, if %EFX_FILTER_MATCH_REM_PORT is set
+ * @encap_type: Encapsulation type to match (from &enum efx_encap_type), if
+ *	%EFX_FILTER_MATCH_ENCAP_TYPE is set
+ *
+ * The efx_filter_init_rx() or efx_filter_init_tx() function *must* be
+ * used to initialise the structure.  The efx_filter_set_*() functions
+ * may then be used to set @rss_context, @match_flags and related
+ * fields.
+ *
+ * The @priority field is used by software to determine whether a new
+ * filter may replace an old one.  The hardware priority of a filter
+ * depends on which fields are matched.
+ */
+struct efx_filter_spec {
+	u32	match_flags:12;
+	u32	priority:2;
+	u32	flags:6;
+	u32	dmaq_id:12;
+	u32	rss_context;
+	__be16	outer_vid __aligned(4); /* allow jhash2() of match values */
+	__be16	inner_vid;
+	u8	loc_mac[ETH_ALEN];
+	u8	rem_mac[ETH_ALEN];
+	__be16	ether_type;
+	u8	ip_proto;
+	__be32	loc_host[4];
+	__be32	rem_host[4];
+	__be16	loc_port;
+	__be16	rem_port;
+	u32     encap_type:4;
+	/* total 65 bytes */
+};
+
+enum {
+	EFX_FILTER_RX_DMAQ_ID_DROP = 0xfff
+};
+
+static inline void efx_filter_init_rx(struct efx_filter_spec *spec,
+				      enum efx_filter_priority priority,
+				      enum efx_filter_flags flags,
+				      unsigned rxq_id)
+{
+	memset(spec, 0, sizeof(*spec));
+	spec->priority = priority;
+	spec->flags = EFX_FILTER_FLAG_RX | flags;
+	spec->rss_context = 0;
+	spec->dmaq_id = rxq_id;
+}
+
+static inline void efx_filter_init_tx(struct efx_filter_spec *spec,
+				      unsigned txq_id)
+{
+	memset(spec, 0, sizeof(*spec));
+	spec->priority = EFX_FILTER_PRI_REQUIRED;
+	spec->flags = EFX_FILTER_FLAG_TX;
+	spec->dmaq_id = txq_id;
+}
+
+/**
+ * efx_filter_set_ipv4_local - specify IPv4 host, transport protocol and port
+ * @spec: Specification to initialise
+ * @proto: Transport layer protocol number
+ * @host: Local host address (network byte order)
+ * @port: Local port (network byte order)
+ */
+static inline int
+efx_filter_set_ipv4_local(struct efx_filter_spec *spec, u8 proto,
+			  __be32 host, __be16 port)
+{
+	spec->match_flags |=
+		EFX_FILTER_MATCH_ETHER_TYPE | EFX_FILTER_MATCH_IP_PROTO |
+		EFX_FILTER_MATCH_LOC_HOST | EFX_FILTER_MATCH_LOC_PORT;
+	spec->ether_type = htons(ETH_P_IP);
+	spec->ip_proto = proto;
+	spec->loc_host[0] = host;
+	spec->loc_port = port;
+	return 0;
+}
+
+/**
+ * efx_filter_set_ipv4_full - specify IPv4 hosts, transport protocol and ports
+ * @spec: Specification to initialise
+ * @proto: Transport layer protocol number
+ * @lhost: Local host address (network byte order)
+ * @lport: Local port (network byte order)
+ * @rhost: Remote host address (network byte order)
+ * @rport: Remote port (network byte order)
+ */
+static inline int
+efx_filter_set_ipv4_full(struct efx_filter_spec *spec, u8 proto,
+			 __be32 lhost, __be16 lport,
+			 __be32 rhost, __be16 rport)
+{
+	spec->match_flags |=
+		EFX_FILTER_MATCH_ETHER_TYPE | EFX_FILTER_MATCH_IP_PROTO |
+		EFX_FILTER_MATCH_LOC_HOST | EFX_FILTER_MATCH_LOC_PORT |
+		EFX_FILTER_MATCH_REM_HOST | EFX_FILTER_MATCH_REM_PORT;
+	spec->ether_type = htons(ETH_P_IP);
+	spec->ip_proto = proto;
+	spec->loc_host[0] = lhost;
+	spec->loc_port = lport;
+	spec->rem_host[0] = rhost;
+	spec->rem_port = rport;
+	return 0;
+}
+
+enum {
+	EFX_FILTER_VID_UNSPEC = 0xffff,
+};
+
+/**
+ * efx_filter_set_eth_local - specify local Ethernet address and/or VID
+ * @spec: Specification to initialise
+ * @vid: Outer VLAN ID to match, or %EFX_FILTER_VID_UNSPEC
+ * @addr: Local Ethernet MAC address, or %NULL
+ */
+static inline int efx_filter_set_eth_local(struct efx_filter_spec *spec,
+					   u16 vid, const u8 *addr)
+{
+	if (vid == EFX_FILTER_VID_UNSPEC && addr == NULL)
+		return -EINVAL;
+
+	if (vid != EFX_FILTER_VID_UNSPEC) {
+		spec->match_flags |= EFX_FILTER_MATCH_OUTER_VID;
+		spec->outer_vid = htons(vid);
+	}
+	if (addr != NULL) {
+		spec->match_flags |= EFX_FILTER_MATCH_LOC_MAC;
+		ether_addr_copy(spec->loc_mac, addr);
+	}
+	return 0;
+}
+
+/**
+ * efx_filter_set_uc_def - specify matching otherwise-unmatched unicast
+ * @spec: Specification to initialise
+ */
+static inline int efx_filter_set_uc_def(struct efx_filter_spec *spec)
+{
+	spec->match_flags |= EFX_FILTER_MATCH_LOC_MAC_IG;
+	return 0;
+}
+
+/**
+ * efx_filter_set_mc_def - specify matching otherwise-unmatched multicast
+ * @spec: Specification to initialise
+ */
+static inline int efx_filter_set_mc_def(struct efx_filter_spec *spec)
+{
+	spec->match_flags |= EFX_FILTER_MATCH_LOC_MAC_IG;
+	spec->loc_mac[0] = 1;
+	return 0;
+}
+
+static inline void efx_filter_set_encap_type(struct efx_filter_spec *spec,
+					     enum efx_encap_type encap_type)
+{
+	spec->match_flags |= EFX_FILTER_MATCH_ENCAP_TYPE;
+	spec->encap_type = encap_type;
+}
+
+static inline enum efx_encap_type efx_filter_get_encap_type(
+		const struct efx_filter_spec *spec)
+{
+	if (spec->match_flags & EFX_FILTER_MATCH_ENCAP_TYPE)
+		return spec->encap_type;
+	return EFX_ENCAP_TYPE_NONE;
+}
+#endif /* EFX_FILTER_H */

drivers/net/ethernet/sfc/siena/io.h

+/* SPDX-License-Identifier: GPL-2.0-only */
+/****************************************************************************
+ * Driver for Solarflare network controllers and boards
+ * Copyright 2005-2006 Fen Systems Ltd.
+ * Copyright 2006-2013 Solarflare Communications Inc.
+ */
+
+#ifndef EFX_IO_H
+#define EFX_IO_H
+
+#include <linux/io.h>
+#include <linux/spinlock.h>
+
+/**************************************************************************
+ *
+ * NIC register I/O
+ *
+ **************************************************************************
+ *
+ * Notes on locking strategy for the Falcon architecture:
+ *
+ * Many CSRs are very wide and cannot be read or written atomically.
+ * Writes from the host are buffered by the Bus Interface Unit (BIU)
+ * up to 128 bits.  Whenever the host writes part of such a register,
+ * the BIU collects the written value and does not write to the
+ * underlying register until all 4 dwords have been written.  A
+ * similar buffering scheme applies to host access to the NIC's 64-bit
+ * SRAM.
+ *
+ * Writes to different CSRs and 64-bit SRAM words must be serialised,
+ * since interleaved access can result in lost writes.  We use
+ * efx_nic::biu_lock for this.
+ *
+ * We also serialise reads from 128-bit CSRs and SRAM with the same
+ * spinlock.  This may not be necessary, but it doesn't really matter
+ * as there are no such reads on the fast path.
+ *
+ * The DMA descriptor pointers (RX_DESC_UPD and TX_DESC_UPD) are
+ * 128-bit but are special-cased in the BIU to avoid the need for
+ * locking in the host:
+ *
+ * - They are write-only.
+ * - The semantics of writing to these registers are such that
+ *   replacing the low 96 bits with zero does not affect functionality.
+ * - If the host writes to the last dword address of such a register
+ *   (i.e. the high 32 bits) the underlying register will always be
+ *   written.  If the collector and the current write together do not
+ *   provide values for all 128 bits of the register, the low 96 bits
+ *   will be written as zero.
+ * - If the host writes to the address of any other part of such a
+ *   register while the collector already holds values for some other
+ *   register, the write is discarded and the collector maintains its
+ *   current state.
+ *
+ * The EF10 architecture exposes very few registers to the host and
+ * most of them are only 32 bits wide.  The only exceptions are the MC
+ * doorbell register pair, which has its own latching, and
+ * TX_DESC_UPD, which works in a similar way to the Falcon
+ * architecture.
+ */
+
+#if BITS_PER_LONG == 64
+#define EFX_USE_QWORD_IO 1
+#endif
+
+/* Hardware issue requires that only 64-bit naturally aligned writes
+ * are seen by hardware. Its not strictly necessary to restrict to
+ * x86_64 arch, but done for safety since unusual write combining behaviour
+ * can break PIO.
+ */
+#ifdef CONFIG_X86_64
+/* PIO is a win only if write-combining is possible */
+#ifdef ARCH_HAS_IOREMAP_WC
+#define EFX_USE_PIO 1
+#endif
+#endif
+
+static inline u32 efx_reg(struct efx_nic *efx, unsigned int reg)
+{
+	return efx->reg_base + reg;
+}
+
+#ifdef EFX_USE_QWORD_IO
+static inline void _efx_writeq(struct efx_nic *efx, __le64 value,
+				  unsigned int reg)
+{
+	__raw_writeq((__force u64)value, efx->membase + reg);
+}
+static inline __le64 _efx_readq(struct efx_nic *efx, unsigned int reg)
+{
+	return (__force __le64)__raw_readq(efx->membase + reg);
+}
+#endif
+
+static inline void _efx_writed(struct efx_nic *efx, __le32 value,
+				  unsigned int reg)
+{
+	__raw_writel((__force u32)value, efx->membase + reg);
+}
+static inline __le32 _efx_readd(struct efx_nic *efx, unsigned int reg)
+{
+	return (__force __le32)__raw_readl(efx->membase + reg);
+}
+
+/* Write a normal 128-bit CSR, locking as appropriate. */
+static inline void efx_writeo(struct efx_nic *efx, const efx_oword_t *value,
+			      unsigned int reg)
+{
+	unsigned long flags __attribute__ ((unused));
+
+	netif_vdbg(efx, hw, efx->net_dev,
+		   "writing register %x with " EFX_OWORD_FMT "\n", reg,
+		   EFX_OWORD_VAL(*value));
+
+	spin_lock_irqsave(&efx->biu_lock, flags);
+#ifdef EFX_USE_QWORD_IO
+	_efx_writeq(efx, value->u64[0], reg + 0);
+	_efx_writeq(efx, value->u64[1], reg + 8);
+#else
+	_efx_writed(efx, value->u32[0], reg + 0);
+	_efx_writed(efx, value->u32[1], reg + 4);
+	_efx_writed(efx, value->u32[2], reg + 8);
+	_efx_writed(efx, value->u32[3], reg + 12);
+#endif
+	spin_unlock_irqrestore(&efx->biu_lock, flags);
+}
+
+/* Write 64-bit SRAM through the supplied mapping, locking as appropriate. */
+static inline void efx_sram_writeq(struct efx_nic *efx, void __iomem *membase,
+				   const efx_qword_t *value, unsigned int index)
+{
+	unsigned int addr = index * sizeof(*value);
+	unsigned long flags __attribute__ ((unused));
+
+	netif_vdbg(efx, hw, efx->net_dev,
+		   "writing SRAM address %x with " EFX_QWORD_FMT "\n",
+		   addr, EFX_QWORD_VAL(*value));
+
+	spin_lock_irqsave(&efx->biu_lock, flags);
+#ifdef EFX_USE_QWORD_IO
+	__raw_writeq((__force u64)value->u64[0], membase + addr);
+#else
+	__raw_writel((__force u32)value->u32[0], membase + addr);
+	__raw_writel((__force u32)value->u32[1], membase + addr + 4);
+#endif
+	spin_unlock_irqrestore(&efx->biu_lock, flags);
+}
+
+/* Write a 32-bit CSR or the last dword of a special 128-bit CSR */
+static inline void efx_writed(struct efx_nic *efx, const efx_dword_t *value,
+			      unsigned int reg)
+{
+	netif_vdbg(efx, hw, efx->net_dev,
+		   "writing register %x with "EFX_DWORD_FMT"\n",
+		   reg, EFX_DWORD_VAL(*value));
+
+	/* No lock required */
+	_efx_writed(efx, value->u32[0], reg);
+}
+
+/* Read a 128-bit CSR, locking as appropriate. */
+static inline void efx_reado(struct efx_nic *efx, efx_oword_t *value,
+			     unsigned int reg)
+{
+	unsigned long flags __attribute__ ((unused));
+
+	spin_lock_irqsave(&efx->biu_lock, flags);
+	value->u32[0] = _efx_readd(efx, reg + 0);
+	value->u32[1] = _efx_readd(efx, reg + 4);
+	value->u32[2] = _efx_readd(efx, reg + 8);
+	value->u32[3] = _efx_readd(efx, reg + 12);
+	spin_unlock_irqrestore(&efx->biu_lock, flags);
+
+	netif_vdbg(efx, hw, efx->net_dev,
+		   "read from register %x, got " EFX_OWORD_FMT "\n", reg,
+		   EFX_OWORD_VAL(*value));
+}
+
+/* Read 64-bit SRAM through the supplied mapping, locking as appropriate. */
+static inline void efx_sram_readq(struct efx_nic *efx, void __iomem *membase,
+				  efx_qword_t *value, unsigned int index)
+{
+	unsigned int addr = index * sizeof(*value);
+	unsigned long flags __attribute__ ((unused));
+
+	spin_lock_irqsave(&efx->biu_lock, flags);
+#ifdef EFX_USE_QWORD_IO
+	value->u64[0] = (__force __le64)__raw_readq(membase + addr);
+#else
+	value->u32[0] = (__force __le32)__raw_readl(membase + addr);
+	value->u32[1] = (__force __le32)__raw_readl(membase + addr + 4);
+#endif
+	spin_unlock_irqrestore(&efx->biu_lock, flags);
+
+	netif_vdbg(efx, hw, efx->net_dev,
+		   "read from SRAM address %x, got "EFX_QWORD_FMT"\n",
+		   addr, EFX_QWORD_VAL(*value));
+}
+
+/* Read a 32-bit CSR or SRAM */
+static inline void efx_readd(struct efx_nic *efx, efx_dword_t *value,
+				unsigned int reg)
+{
+	value->u32[0] = _efx_readd(efx, reg);
+	netif_vdbg(efx, hw, efx->net_dev,
+		   "read from register %x, got "EFX_DWORD_FMT"\n",
+		   reg, EFX_DWORD_VAL(*value));
+}
+
+/* Write a 128-bit CSR forming part of a table */
+static inline void
+efx_writeo_table(struct efx_nic *efx, const efx_oword_t *value,
+		 unsigned int reg, unsigned int index)
+{
+	efx_writeo(efx, value, reg + index * sizeof(efx_oword_t));
+}
+
+/* Read a 128-bit CSR forming part of a table */
+static inline void efx_reado_table(struct efx_nic *efx, efx_oword_t *value,
+				     unsigned int reg, unsigned int index)
+{
+	efx_reado(efx, value, reg + index * sizeof(efx_oword_t));
+}
+
+/* default VI stride (step between per-VI registers) is 8K on EF10 and
+ * 64K on EF100
+ */
+#define EFX_DEFAULT_VI_STRIDE		0x2000
+#define EF100_DEFAULT_VI_STRIDE		0x10000
+
+/* Calculate offset to page-mapped register */
+static inline unsigned int efx_paged_reg(struct efx_nic *efx, unsigned int page,
+					 unsigned int reg)
+{
+	return page * efx->vi_stride + reg;
+}
+
+/* Write the whole of RX_DESC_UPD or TX_DESC_UPD */
+static inline void _efx_writeo_page(struct efx_nic *efx, efx_oword_t *value,
+				    unsigned int reg, unsigned int page)
+{
+	reg = efx_paged_reg(efx, page, reg);
+
+	netif_vdbg(efx, hw, efx->net_dev,
+		   "writing register %x with " EFX_OWORD_FMT "\n", reg,
+		   EFX_OWORD_VAL(*value));
+
+#ifdef EFX_USE_QWORD_IO
+	_efx_writeq(efx, value->u64[0], reg + 0);
+	_efx_writeq(efx, value->u64[1], reg + 8);
+#else
+	_efx_writed(efx, value->u32[0], reg + 0);
+	_efx_writed(efx, value->u32[1], reg + 4);
+	_efx_writed(efx, value->u32[2], reg + 8);
+	_efx_writed(efx, value->u32[3], reg + 12);
+#endif
+}
+#define efx_writeo_page(efx, value, reg, page)				\
+	_efx_writeo_page(efx, value,					\
+			 reg +						\
+			 BUILD_BUG_ON_ZERO((reg) != 0x830 && (reg) != 0xa10), \
+			 page)
+
+/* Write a page-mapped 32-bit CSR (EVQ_RPTR, EVQ_TMR (EF10), or the
+ * high bits of RX_DESC_UPD or TX_DESC_UPD)
+ */
+static inline void
+_efx_writed_page(struct efx_nic *efx, const efx_dword_t *value,
+		 unsigned int reg, unsigned int page)
+{
+	efx_writed(efx, value, efx_paged_reg(efx, page, reg));
+}
+#define efx_writed_page(efx, value, reg, page)				\
+	_efx_writed_page(efx, value,					\
+			 reg +						\
+			 BUILD_BUG_ON_ZERO((reg) != 0x180 &&		\
+					   (reg) != 0x200 &&		\
+					   (reg) != 0x400 &&		\
+					   (reg) != 0x420 &&		\
+					   (reg) != 0x830 &&		\
+					   (reg) != 0x83c &&		\
+					   (reg) != 0xa18 &&		\
+					   (reg) != 0xa1c),		\
+			 page)
+
+/* Write TIMER_COMMAND.  This is a page-mapped 32-bit CSR, but a bug
+ * in the BIU means that writes to TIMER_COMMAND[0] invalidate the
+ * collector register.
+ */
+static inline void _efx_writed_page_locked(struct efx_nic *efx,
+					   const efx_dword_t *value,
+					   unsigned int reg,
+					   unsigned int page)
+{
+	unsigned long flags __attribute__ ((unused));
+
+	if (page == 0) {
+		spin_lock_irqsave(&efx->biu_lock, flags);
+		efx_writed(efx, value, efx_paged_reg(efx, page, reg));
+		spin_unlock_irqrestore(&efx->biu_lock, flags);
+	} else {
+		efx_writed(efx, value, efx_paged_reg(efx, page, reg));
+	}
+}
+#define efx_writed_page_locked(efx, value, reg, page)			\
+	_efx_writed_page_locked(efx, value,				\
+				reg + BUILD_BUG_ON_ZERO((reg) != 0x420), \
+				page)
+
+#endif /* EFX_IO_H */