380 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/* Atlantic Network Driver3 *4 * Copyright (C) 2014-2019 aQuantia Corporation5 * Copyright (C) 2019-2020 Marvell International Ltd.6 */7 8/* File aq_vec.c: Definition of common structure for vector of Rx and Tx rings.9 * Definition of functions for Rx and Tx rings. Friendly module for aq_nic.10 */11 12#include "aq_vec.h"13 14struct aq_vec_s {15 const struct aq_hw_ops *aq_hw_ops;16 struct aq_hw_s *aq_hw;17 struct aq_nic_s *aq_nic;18 unsigned int tx_rings;19 unsigned int rx_rings;20 struct aq_ring_param_s aq_ring_param;21 struct napi_struct napi;22 struct aq_ring_s ring[AQ_CFG_TCS_MAX][2];23};24 25#define AQ_VEC_TX_ID 026#define AQ_VEC_RX_ID 127 28static int aq_vec_poll(struct napi_struct *napi, int budget)29{30 struct aq_vec_s *self = container_of(napi, struct aq_vec_s, napi);31 unsigned int sw_tail_old = 0U;32 struct aq_ring_s *ring = NULL;33 bool was_tx_cleaned = true;34 unsigned int i = 0U;35 int work_done = 0;36 int err = 0;37 38 if (!self) {39 err = -EINVAL;40 } else {41 for (i = 0U; self->tx_rings > i; ++i) {42 ring = self->ring[i];43 u64_stats_update_begin(&ring[AQ_VEC_RX_ID].stats.rx.syncp);44 ring[AQ_VEC_RX_ID].stats.rx.polls++;45 u64_stats_update_end(&ring[AQ_VEC_RX_ID].stats.rx.syncp);46 if (self->aq_hw_ops->hw_ring_tx_head_update) {47 err = self->aq_hw_ops->hw_ring_tx_head_update(48 self->aq_hw,49 &ring[AQ_VEC_TX_ID]);50 if (err < 0)51 goto err_exit;52 }53 54 if (ring[AQ_VEC_TX_ID].sw_head !=55 ring[AQ_VEC_TX_ID].hw_head) {56 was_tx_cleaned = aq_ring_tx_clean(&ring[AQ_VEC_TX_ID]);57 aq_ring_update_queue_state(&ring[AQ_VEC_TX_ID]);58 }59 60 err = self->aq_hw_ops->hw_ring_rx_receive(self->aq_hw,61 &ring[AQ_VEC_RX_ID]);62 if (err < 0)63 goto err_exit;64 65 if (ring[AQ_VEC_RX_ID].sw_head !=66 ring[AQ_VEC_RX_ID].hw_head) {67 err = aq_ring_rx_clean(&ring[AQ_VEC_RX_ID],68 napi,69 &work_done,70 budget - work_done);71 if (err < 0)72 goto err_exit;73 74 sw_tail_old = ring[AQ_VEC_RX_ID].sw_tail;75 76 err = aq_ring_rx_fill(&ring[AQ_VEC_RX_ID]);77 if (err < 0)78 goto err_exit;79 80 err = self->aq_hw_ops->hw_ring_rx_fill(81 self->aq_hw,82 &ring[AQ_VEC_RX_ID], sw_tail_old);83 if (err < 0)84 goto err_exit;85 }86 }87 88err_exit:89 if (!was_tx_cleaned)90 work_done = budget;91 92 if (work_done < budget) {93 napi_complete_done(napi, work_done);94 self->aq_hw_ops->hw_irq_enable(self->aq_hw,95 1U << self->aq_ring_param.vec_idx);96 }97 }98 99 return work_done;100}101 102struct aq_vec_s *aq_vec_alloc(struct aq_nic_s *aq_nic, unsigned int idx,103 struct aq_nic_cfg_s *aq_nic_cfg)104{105 struct aq_vec_s *self = NULL;106 107 self = kzalloc(sizeof(*self), GFP_KERNEL);108 if (!self)109 goto err_exit;110 111 self->aq_nic = aq_nic;112 self->aq_ring_param.vec_idx = idx;113 self->aq_ring_param.cpu =114 idx + aq_nic_cfg->aq_rss.base_cpu_number;115 116 cpumask_set_cpu(self->aq_ring_param.cpu,117 &self->aq_ring_param.affinity_mask);118 119 self->tx_rings = 0;120 self->rx_rings = 0;121 122 netif_napi_add(aq_nic_get_ndev(aq_nic), &self->napi, aq_vec_poll);123 124err_exit:125 return self;126}127 128int aq_vec_ring_alloc(struct aq_vec_s *self, struct aq_nic_s *aq_nic,129 unsigned int idx, struct aq_nic_cfg_s *aq_nic_cfg)130{131 struct aq_ring_s *ring = NULL;132 unsigned int i = 0U;133 int err = 0;134 135 for (i = 0; i < aq_nic_cfg->tcs; ++i) {136 const unsigned int idx_ring = AQ_NIC_CFG_TCVEC2RING(aq_nic_cfg,137 i, idx);138 139 ring = &self->ring[i][AQ_VEC_TX_ID];140 err = aq_ring_tx_alloc(ring, aq_nic, idx_ring, aq_nic_cfg);141 if (err)142 goto err_exit;143 144 ++self->tx_rings;145 146 aq_nic_set_tx_ring(aq_nic, idx_ring, ring);147 148 ring = &self->ring[i][AQ_VEC_RX_ID];149 if (xdp_rxq_info_reg(&ring->xdp_rxq,150 aq_nic->ndev, idx,151 self->napi.napi_id) < 0) {152 err = -ENOMEM;153 goto err_exit;154 }155 if (xdp_rxq_info_reg_mem_model(&ring->xdp_rxq,156 MEM_TYPE_PAGE_SHARED, NULL) < 0) {157 xdp_rxq_info_unreg(&ring->xdp_rxq);158 err = -ENOMEM;159 goto err_exit;160 }161 162 err = aq_ring_rx_alloc(ring, aq_nic, idx_ring, aq_nic_cfg);163 if (err) {164 xdp_rxq_info_unreg(&ring->xdp_rxq);165 goto err_exit;166 }167 168 ++self->rx_rings;169 }170 171err_exit:172 if (err < 0) {173 aq_vec_ring_free(self);174 self = NULL;175 }176 177 return err;178}179 180int aq_vec_init(struct aq_vec_s *self, const struct aq_hw_ops *aq_hw_ops,181 struct aq_hw_s *aq_hw)182{183 struct aq_ring_s *ring = NULL;184 unsigned int i = 0U;185 int err = 0;186 187 self->aq_hw_ops = aq_hw_ops;188 self->aq_hw = aq_hw;189 190 for (i = 0U; self->tx_rings > i; ++i) {191 ring = self->ring[i];192 err = aq_ring_init(&ring[AQ_VEC_TX_ID], ATL_RING_TX);193 if (err < 0)194 goto err_exit;195 196 err = self->aq_hw_ops->hw_ring_tx_init(self->aq_hw,197 &ring[AQ_VEC_TX_ID],198 &self->aq_ring_param);199 if (err < 0)200 goto err_exit;201 202 err = aq_ring_init(&ring[AQ_VEC_RX_ID], ATL_RING_RX);203 if (err < 0)204 goto err_exit;205 206 err = self->aq_hw_ops->hw_ring_rx_init(self->aq_hw,207 &ring[AQ_VEC_RX_ID],208 &self->aq_ring_param);209 if (err < 0)210 goto err_exit;211 212 err = aq_ring_rx_fill(&ring[AQ_VEC_RX_ID]);213 if (err < 0)214 goto err_exit;215 216 err = self->aq_hw_ops->hw_ring_rx_fill(self->aq_hw,217 &ring[AQ_VEC_RX_ID], 0U);218 if (err < 0)219 goto err_exit;220 }221 222err_exit:223 return err;224}225 226int aq_vec_start(struct aq_vec_s *self)227{228 struct aq_ring_s *ring = NULL;229 unsigned int i = 0U;230 int err = 0;231 232 for (i = 0U; self->tx_rings > i; ++i) {233 ring = self->ring[i];234 err = self->aq_hw_ops->hw_ring_tx_start(self->aq_hw,235 &ring[AQ_VEC_TX_ID]);236 if (err < 0)237 goto err_exit;238 239 err = self->aq_hw_ops->hw_ring_rx_start(self->aq_hw,240 &ring[AQ_VEC_RX_ID]);241 if (err < 0)242 goto err_exit;243 }244 245 napi_enable(&self->napi);246 247err_exit:248 return err;249}250 251void aq_vec_stop(struct aq_vec_s *self)252{253 struct aq_ring_s *ring = NULL;254 unsigned int i = 0U;255 256 for (i = 0U; self->tx_rings > i; ++i) {257 ring = self->ring[i];258 self->aq_hw_ops->hw_ring_tx_stop(self->aq_hw,259 &ring[AQ_VEC_TX_ID]);260 261 self->aq_hw_ops->hw_ring_rx_stop(self->aq_hw,262 &ring[AQ_VEC_RX_ID]);263 }264 265 napi_disable(&self->napi);266}267 268void aq_vec_deinit(struct aq_vec_s *self)269{270 struct aq_ring_s *ring = NULL;271 unsigned int i = 0U;272 273 if (!self)274 goto err_exit;275 276 for (i = 0U; self->tx_rings > i; ++i) {277 ring = self->ring[i];278 aq_ring_tx_clean(&ring[AQ_VEC_TX_ID]);279 aq_ring_rx_deinit(&ring[AQ_VEC_RX_ID]);280 }281 282err_exit:;283}284 285void aq_vec_free(struct aq_vec_s *self)286{287 if (!self)288 goto err_exit;289 290 netif_napi_del(&self->napi);291 292 kfree(self);293 294err_exit:;295}296 297void aq_vec_ring_free(struct aq_vec_s *self)298{299 struct aq_ring_s *ring = NULL;300 unsigned int i = 0U;301 302 if (!self)303 goto err_exit;304 305 for (i = 0U; self->tx_rings > i; ++i) {306 ring = self->ring[i];307 aq_ring_free(&ring[AQ_VEC_TX_ID]);308 if (i < self->rx_rings) {309 xdp_rxq_info_unreg(&ring[AQ_VEC_RX_ID].xdp_rxq);310 aq_ring_free(&ring[AQ_VEC_RX_ID]);311 }312 }313 314 self->tx_rings = 0;315 self->rx_rings = 0;316err_exit:;317}318 319irqreturn_t aq_vec_isr(int irq, void *private)320{321 struct aq_vec_s *self = private;322 int err = 0;323 324 if (!self) {325 err = -EINVAL;326 goto err_exit;327 }328 napi_schedule(&self->napi);329 330err_exit:331 return err >= 0 ? IRQ_HANDLED : IRQ_NONE;332}333 334irqreturn_t aq_vec_isr_legacy(int irq, void *private)335{336 struct aq_vec_s *self = private;337 u64 irq_mask = 0U;338 int err;339 340 if (!self)341 return IRQ_NONE;342 err = self->aq_hw_ops->hw_irq_read(self->aq_hw, &irq_mask);343 if (err < 0)344 return IRQ_NONE;345 346 if (irq_mask) {347 self->aq_hw_ops->hw_irq_disable(self->aq_hw,348 1U << self->aq_ring_param.vec_idx);349 napi_schedule(&self->napi);350 } else {351 self->aq_hw_ops->hw_irq_enable(self->aq_hw, 1U);352 return IRQ_NONE;353 }354 355 return IRQ_HANDLED;356}357 358cpumask_t *aq_vec_get_affinity_mask(struct aq_vec_s *self)359{360 return &self->aq_ring_param.affinity_mask;361}362 363bool aq_vec_is_valid_tc(struct aq_vec_s *self, const unsigned int tc)364{365 return tc < self->rx_rings && tc < self->tx_rings;366}367 368unsigned int aq_vec_get_sw_stats(struct aq_vec_s *self, const unsigned int tc, u64 *data)369{370 unsigned int count;371 372 if (!aq_vec_is_valid_tc(self, tc))373 return 0;374 375 count = aq_ring_fill_stats_data(&self->ring[tc][AQ_VEC_RX_ID], data);376 count += aq_ring_fill_stats_data(&self->ring[tc][AQ_VEC_TX_ID], data + count);377 378 return count;379}380