summaryrefslogtreecommitdiffstats
path: root/drivers/net/ethernet/sfc/efx.h
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/ethernet/sfc/efx.h')
-rw-r--r--drivers/net/ethernet/sfc/efx.h241
1 files changed, 241 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h
new file mode 100644
index 0000000000..48d3623735
--- /dev/null
+++ b/drivers/net/ethernet/sfc/efx.h
@@ -0,0 +1,241 @@
+/* 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 "efx_common.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);
+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;
+
+ /* We must stop reps (which use our TX) before we stop ourselves. */
+ efx_detach_reps(efx);
+
+ /* 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);
+ if (efx->state == STATE_NET_UP)
+ efx_attach_reps(efx);
+ }
+}
+
+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 */