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

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /****************************************************************************
   3  * Driver for Solarflare network controllers and boards
   4  * Copyright 2005-2006 Fen Systems Ltd.
   5  * Copyright 2006-2013 Solarflare Communications Inc.
   6  */
   7
   8 #ifndef EFX_EFX_H
   9 #define EFX_EFX_H
  10
  11 #include <linux/indirect_call_wrapper.h>
  12 #include "net_driver.h"
  13 #include "filter.h"
  14
  15 /* TX */
  16 void efx_siena_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue);
  17 netdev_tx_t efx_siena_hard_start_xmit(struct sk_buff *skb,
  18                                       struct net_device *net_dev);
  19 netdev_tx_t __efx_siena_enqueue_skb(struct efx_tx_queue *tx_queue,
  20                                     struct sk_buff *skb);
  21 static inline netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb)
  22 {
  23         return INDIRECT_CALL_1(tx_queue->efx->type->tx_enqueue,
  24                                __efx_siena_enqueue_skb, tx_queue, skb);
  25 }
  26 int efx_siena_setup_tc(struct net_device *net_dev, enum tc_setup_type type,
  27                        void *type_data);
  28
  29 /* RX */
  30 void __efx_siena_rx_packet(struct efx_channel *channel);
  31 void efx_siena_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,
  32                          unsigned int n_frags, unsigned int len, u16 flags);
  33 static inline void efx_rx_flush_packet(struct efx_channel *channel)
  34 {
  35         if (channel->rx_pkt_n_frags)
  36                 __efx_siena_rx_packet(channel);
  37 }
  38
  39 /* Maximum number of TCP segments we support for soft-TSO */
  40 #define EFX_TSO_MAX_SEGS        100
  41
  42 /* The smallest [rt]xq_entries that the driver supports.  RX minimum
  43  * is a bit arbitrary.  For TX, we must have space for at least 2
  44  * TSO skbs.
  45  */
  46 #define EFX_RXQ_MIN_ENT         128U
  47 #define EFX_TXQ_MIN_ENT(efx)    (2 * efx_siena_tx_max_skb_descs(efx))
  48
  49 /* All EF10 architecture NICs steal one bit of the DMAQ size for various
  50  * other purposes when counting TxQ entries, so we halve the queue size.
  51  */
  52 #define EFX_TXQ_MAX_ENT(efx)    (EFX_WORKAROUND_EF10(efx) ? \
  53                                  EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE)
  54
  55 static inline bool efx_rss_enabled(struct efx_nic *efx)
  56 {
  57         return efx->rss_spread > 1;
  58 }
  59
  60 /* Filters */
  61
  62 /**
  63  * efx_filter_insert_filter - add or replace a filter
  64  * @efx: NIC in which to insert the filter
  65  * @spec: Specification for the filter
  66  * @replace_equal: Flag for whether the specified filter may replace an
  67  *      existing filter with equal priority
  68  *
  69  * On success, return the filter ID.
  70  * On failure, return a negative error code.
  71  *
  72  * If existing filters have equal match values to the new filter spec,
  73  * then the new filter might replace them or the function might fail,
  74  * as follows.
  75  *
  76  * 1. If the existing filters have lower priority, or @replace_equal
  77  *    is set and they have equal priority, replace them.
  78  *
  79  * 2. If the existing filters have higher priority, return -%EPERM.
  80  *
  81  * 3. If !efx_siena_filter_is_mc_recipient(@spec), or the NIC does not
  82  *    support delivery to multiple recipients, return -%EEXIST.
  83  *
  84  * This implies that filters for multiple multicast recipients must
  85  * all be inserted with the same priority and @replace_equal = %false.
  86  */
  87 static inline s32 efx_filter_insert_filter(struct efx_nic *efx,
  88                                            struct efx_filter_spec *spec,
  89                                            bool replace_equal)
  90 {
  91         return efx->type->filter_insert(efx, spec, replace_equal);
  92 }
  93
  94 /**
  95  * efx_filter_remove_id_safe - remove a filter by ID, carefully
  96  * @efx: NIC from which to remove the filter
  97  * @priority: Priority of filter, as passed to @efx_filter_insert_filter
  98  * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
  99  *
 100  * This function will range-check @filter_id, so it is safe to call
 101  * with a value passed from userland.
 102  */
 103 static inline int efx_filter_remove_id_safe(struct efx_nic *efx,
 104                                             enum efx_filter_priority priority,
 105                                             u32 filter_id)
 106 {
 107         return efx->type->filter_remove_safe(efx, priority, filter_id);
 108 }
 109
 110 /**
 111  * efx_filter_get_filter_safe - retrieve a filter by ID, carefully
 112  * @efx: NIC from which to remove the filter
 113  * @priority: Priority of filter, as passed to @efx_filter_insert_filter
 114  * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
 115  * @spec: Buffer in which to store filter specification
 116  *
 117  * This function will range-check @filter_id, so it is safe to call
 118  * with a value passed from userland.
 119  */
 120 static inline int
 121 efx_filter_get_filter_safe(struct efx_nic *efx,
 122                            enum efx_filter_priority priority,
 123                            u32 filter_id, struct efx_filter_spec *spec)
 124 {
 125         return efx->type->filter_get_safe(efx, priority, filter_id, spec);
 126 }
 127
 128 static inline u32 efx_filter_count_rx_used(struct efx_nic *efx,
 129                                            enum efx_filter_priority priority)
 130 {
 131         return efx->type->filter_count_rx_used(efx, priority);
 132 }
 133 static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx)
 134 {
 135         return efx->type->filter_get_rx_id_limit(efx);
 136 }
 137 static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx,
 138                                         enum efx_filter_priority priority,
 139                                         u32 *buf, u32 size)
 140 {
 141         return efx->type->filter_get_rx_ids(efx, priority, buf, size);
 142 }
 143
 144 /* RSS contexts */
 145 static inline bool efx_rss_active(struct efx_rss_context *ctx)
 146 {
 147         return ctx->context_id != EFX_MCDI_RSS_CONTEXT_INVALID;
 148 }
 149
 150 /* Ethtool support */
 151 extern const struct ethtool_ops efx_siena_ethtool_ops;
 152
 153 /* Global */
 154 unsigned int efx_siena_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs);
 155 int efx_siena_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
 156                                   unsigned int rx_usecs, bool rx_adaptive,
 157                                   bool rx_may_override_tx);
 158 void efx_siena_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
 159                                   unsigned int *rx_usecs, bool *rx_adaptive);
 160
 161 /* Update the generic software stats in the passed stats array */
 162 void efx_siena_update_sw_stats(struct efx_nic *efx, u64 *stats);
 163
 164 /* MTD */
 165 #ifdef CONFIG_SFC_SIENA_MTD
 166 int efx_siena_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts,
 167                       size_t n_parts, size_t sizeof_part);
 168 static inline int efx_mtd_probe(struct efx_nic *efx)
 169 {
 170         return efx->type->mtd_probe(efx);
 171 }
 172 void efx_siena_mtd_rename(struct efx_nic *efx);
 173 void efx_siena_mtd_remove(struct efx_nic *efx);
 174 #else
 175 static inline int efx_mtd_probe(struct efx_nic *efx) { return 0; }
 176 static inline void efx_siena_mtd_rename(struct efx_nic *efx) {}
 177 static inline void efx_siena_mtd_remove(struct efx_nic *efx) {}
 178 #endif
 179
 180 #ifdef CONFIG_SFC_SIENA_SRIOV
 181 static inline unsigned int efx_vf_size(struct efx_nic *efx)
 182 {
 183         return 1 << efx->vi_scale;
 184 }
 185 #endif
 186
 187 static inline void efx_device_detach_sync(struct efx_nic *efx)
 188 {
 189         struct net_device *dev = efx->net_dev;
 190
 191         /* Lock/freeze all TX queues so that we can be sure the
 192          * TX scheduler is stopped when we're done and before
 193          * netif_device_present() becomes false.
 194          */
 195         netif_tx_lock_bh(dev);
 196         netif_device_detach(dev);
 197         netif_tx_unlock_bh(dev);
 198 }
 199
 200 static inline void efx_device_attach_if_not_resetting(struct efx_nic *efx)
 201 {
 202         if ((efx->state != STATE_DISABLED) && !efx->reset_pending)
 203                 netif_device_attach(efx->net_dev);
 204 }
 205
 206 static inline bool efx_rwsem_assert_write_locked(struct rw_semaphore *sem)
 207 {
 208         if (WARN_ON(down_read_trylock(sem))) {
 209                 up_read(sem);
 210                 return false;
 211         }
 212         return true;
 213 }
 214
 215 int efx_siena_xdp_tx_buffers(struct efx_nic *efx, int n,
 216                              struct xdp_frame **xdpfs, bool flush);
 217
 218 #endif /* EFX_EFX_H */