1 /* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */ 2 /* Copyright 2017-2019 NXP */ 3 4 #include <linux/timer.h> 5 #include <linux/pci.h> 6 #include <linux/netdevice.h> 7 #include <linux/etherdevice.h> 8 #include <linux/dma-mapping.h> 9 #include <linux/skbuff.h> 10 #include <linux/ethtool.h> 11 #include <linux/if_vlan.h> 12 #include <linux/phy.h> 13 14 #include "enetc_hw.h" 15 16 #define ENETC_MAC_MAXFRM_SIZE 9600 17 #define ENETC_MAX_MTU (ENETC_MAC_MAXFRM_SIZE - \ 18 (ETH_FCS_LEN + ETH_HLEN + VLAN_HLEN)) 19 20 struct enetc_tx_swbd { 21 struct sk_buff *skb; 22 dma_addr_t dma; 23 u16 len; 24 u8 is_dma_page:1; 25 u8 check_wb:1; 26 u8 do_tstamp:1; 27 }; 28 29 #define ENETC_RX_MAXFRM_SIZE ENETC_MAC_MAXFRM_SIZE 30 #define ENETC_RXB_TRUESIZE 2048 /* PAGE_SIZE >> 1 */ 31 #define ENETC_RXB_PAD NET_SKB_PAD /* add extra space if needed */ 32 #define ENETC_RXB_DMA_SIZE \ 33 (SKB_WITH_OVERHEAD(ENETC_RXB_TRUESIZE) - ENETC_RXB_PAD) 34 35 struct enetc_rx_swbd { 36 dma_addr_t dma; 37 struct page *page; 38 u16 page_offset; 39 }; 40 41 struct enetc_ring_stats { 42 unsigned int packets; 43 unsigned int bytes; 44 unsigned int rx_alloc_errs; 45 }; 46 47 #define ENETC_BDR_DEFAULT_SIZE 1024 48 #define ENETC_DEFAULT_TX_WORK 256 49 50 struct enetc_bdr { 51 struct device *dev; /* for DMA mapping */ 52 struct net_device *ndev; 53 void *bd_base; /* points to Rx or Tx BD ring */ 54 union { 55 void __iomem *tpir; 56 void __iomem *rcir; 57 }; 58 u16 index; 59 int bd_count; /* # of BDs */ 60 int next_to_use; 61 int next_to_clean; 62 union { 63 struct enetc_tx_swbd *tx_swbd; 64 struct enetc_rx_swbd *rx_swbd; 65 }; 66 union { 67 void __iomem *tcir; /* Tx */ 68 int next_to_alloc; /* Rx */ 69 }; 70 void __iomem *idr; /* Interrupt Detect Register pointer */ 71 72 struct enetc_ring_stats stats; 73 74 dma_addr_t bd_dma_base; 75 u8 tsd_enable; /* Time specific departure */ 76 bool ext_en; /* enable h/w descriptor extensions */ 77 } ____cacheline_aligned_in_smp; 78 79 static inline void enetc_bdr_idx_inc(struct enetc_bdr *bdr, int *i) 80 { 81 if (unlikely(++*i == bdr->bd_count)) 82 *i = 0; 83 } 84 85 static inline int enetc_bd_unused(struct enetc_bdr *bdr) 86 { 87 if (bdr->next_to_clean > bdr->next_to_use) 88 return bdr->next_to_clean - bdr->next_to_use - 1; 89 90 return bdr->bd_count + bdr->next_to_clean - bdr->next_to_use - 1; 91 } 92 93 /* Control BD ring */ 94 #define ENETC_CBDR_DEFAULT_SIZE 64 95 struct enetc_cbdr { 96 void *bd_base; /* points to Rx or Tx BD ring */ 97 void __iomem *pir; 98 void __iomem *cir; 99 100 int bd_count; /* # of BDs */ 101 int next_to_use; 102 int next_to_clean; 103 104 dma_addr_t bd_dma_base; 105 }; 106 107 #define ENETC_TXBD(BDR, i) (&(((union enetc_tx_bd *)((BDR).bd_base))[i])) 108 109 static inline union enetc_rx_bd *enetc_rxbd(struct enetc_bdr *rx_ring, int i) 110 { 111 int hw_idx = i; 112 113 #ifdef CONFIG_FSL_ENETC_PTP_CLOCK 114 if (rx_ring->ext_en) 115 hw_idx = 2 * i; 116 #endif 117 return &(((union enetc_rx_bd *)rx_ring->bd_base)[hw_idx]); 118 } 119 120 static inline union enetc_rx_bd *enetc_rxbd_next(struct enetc_bdr *rx_ring, 121 union enetc_rx_bd *rxbd, 122 int i) 123 { 124 rxbd++; 125 #ifdef CONFIG_FSL_ENETC_PTP_CLOCK 126 if (rx_ring->ext_en) 127 rxbd++; 128 #endif 129 if (unlikely(++i == rx_ring->bd_count)) 130 rxbd = rx_ring->bd_base; 131 132 return rxbd; 133 } 134 135 static inline union enetc_rx_bd *enetc_rxbd_ext(union enetc_rx_bd *rxbd) 136 { 137 return ++rxbd; 138 } 139 140 struct enetc_msg_swbd { 141 void *vaddr; 142 dma_addr_t dma; 143 int size; 144 }; 145 146 #define ENETC_REV1 0x1 147 enum enetc_errata { 148 ENETC_ERR_TXCSUM = BIT(0), 149 ENETC_ERR_VLAN_ISOL = BIT(1), 150 ENETC_ERR_UCMCSWP = BIT(2), 151 }; 152 153 #define ENETC_SI_F_QBV BIT(0) 154 155 /* PCI IEP device data */ 156 struct enetc_si { 157 struct pci_dev *pdev; 158 struct enetc_hw hw; 159 enum enetc_errata errata; 160 161 struct net_device *ndev; /* back ref. */ 162 163 struct enetc_cbdr cbd_ring; 164 165 int num_rx_rings; /* how many rings are available in the SI */ 166 int num_tx_rings; 167 int num_fs_entries; 168 int num_rss; /* number of RSS buckets */ 169 unsigned short pad; 170 int hw_features; 171 }; 172 173 #define ENETC_SI_ALIGN 32 174 175 static inline void *enetc_si_priv(const struct enetc_si *si) 176 { 177 return (char *)si + ALIGN(sizeof(struct enetc_si), ENETC_SI_ALIGN); 178 } 179 180 static inline bool enetc_si_is_pf(struct enetc_si *si) 181 { 182 return !!(si->hw.port); 183 } 184 185 #define ENETC_MAX_NUM_TXQS 8 186 #define ENETC_INT_NAME_MAX (IFNAMSIZ + 8) 187 188 struct enetc_int_vector { 189 void __iomem *rbier; 190 void __iomem *tbier_base; 191 unsigned long tx_rings_map; 192 int count_tx_rings; 193 struct napi_struct napi; 194 char name[ENETC_INT_NAME_MAX]; 195 196 struct enetc_bdr rx_ring ____cacheline_aligned_in_smp; 197 struct enetc_bdr tx_ring[]; 198 }; 199 200 struct enetc_cls_rule { 201 struct ethtool_rx_flow_spec fs; 202 int used; 203 }; 204 205 #define ENETC_MAX_BDR_INT 2 /* fixed to max # of available cpus */ 206 207 /* TODO: more hardware offloads */ 208 enum enetc_active_offloads { 209 ENETC_F_RX_TSTAMP = BIT(0), 210 ENETC_F_TX_TSTAMP = BIT(1), 211 ENETC_F_QBV = BIT(2), 212 }; 213 214 struct enetc_ndev_priv { 215 struct net_device *ndev; 216 struct device *dev; /* dma-mapping device */ 217 struct enetc_si *si; 218 219 int bdr_int_num; /* number of Rx/Tx ring interrupts */ 220 struct enetc_int_vector *int_vector[ENETC_MAX_BDR_INT]; 221 u16 num_rx_rings, num_tx_rings; 222 u16 rx_bd_count, tx_bd_count; 223 224 u16 msg_enable; 225 int active_offloads; 226 227 u32 speed; /* store speed for compare update pspeed */ 228 229 struct enetc_bdr *tx_ring[16]; 230 struct enetc_bdr *rx_ring[16]; 231 232 struct enetc_cls_rule *cls_rules; 233 234 struct device_node *phy_node; 235 phy_interface_t if_mode; 236 }; 237 238 /* Messaging */ 239 240 /* VF-PF set primary MAC address message format */ 241 struct enetc_msg_cmd_set_primary_mac { 242 struct enetc_msg_cmd_header header; 243 struct sockaddr mac; 244 }; 245 246 #define ENETC_CBD(R, i) (&(((struct enetc_cbd *)((R).bd_base))[i])) 247 248 #define ENETC_CBDR_TIMEOUT 1000 /* usecs */ 249 250 /* PTP driver exports */ 251 extern int enetc_phc_index; 252 253 /* SI common */ 254 int enetc_pci_probe(struct pci_dev *pdev, const char *name, int sizeof_priv); 255 void enetc_pci_remove(struct pci_dev *pdev); 256 int enetc_alloc_msix(struct enetc_ndev_priv *priv); 257 void enetc_free_msix(struct enetc_ndev_priv *priv); 258 void enetc_get_si_caps(struct enetc_si *si); 259 void enetc_init_si_rings_params(struct enetc_ndev_priv *priv); 260 int enetc_alloc_si_resources(struct enetc_ndev_priv *priv); 261 void enetc_free_si_resources(struct enetc_ndev_priv *priv); 262 263 int enetc_open(struct net_device *ndev); 264 int enetc_close(struct net_device *ndev); 265 netdev_tx_t enetc_xmit(struct sk_buff *skb, struct net_device *ndev); 266 struct net_device_stats *enetc_get_stats(struct net_device *ndev); 267 int enetc_set_features(struct net_device *ndev, 268 netdev_features_t features); 269 int enetc_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd); 270 int enetc_setup_tc(struct net_device *ndev, enum tc_setup_type type, 271 void *type_data); 272 273 /* ethtool */ 274 void enetc_set_ethtool_ops(struct net_device *ndev); 275 276 /* control buffer descriptor ring (CBDR) */ 277 int enetc_set_mac_flt_entry(struct enetc_si *si, int index, 278 char *mac_addr, int si_map); 279 int enetc_clear_mac_flt_entry(struct enetc_si *si, int index); 280 int enetc_set_fs_entry(struct enetc_si *si, struct enetc_cmd_rfse *rfse, 281 int index); 282 void enetc_set_rss_key(struct enetc_hw *hw, const u8 *bytes); 283 int enetc_get_rss_table(struct enetc_si *si, u32 *table, int count); 284 int enetc_set_rss_table(struct enetc_si *si, const u32 *table, int count); 285 int enetc_send_cmd(struct enetc_si *si, struct enetc_cbd *cbd); 286 287 #ifdef CONFIG_FSL_ENETC_QOS 288 int enetc_setup_tc_taprio(struct net_device *ndev, void *type_data); 289 void enetc_sched_speed_set(struct net_device *ndev); 290 int enetc_setup_tc_cbs(struct net_device *ndev, void *type_data); 291 int enetc_setup_tc_txtime(struct net_device *ndev, void *type_data); 292 #else 293 #define enetc_setup_tc_taprio(ndev, type_data) -EOPNOTSUPP 294 #define enetc_sched_speed_set(ndev) (void)0 295 #define enetc_setup_tc_cbs(ndev, type_data) -EOPNOTSUPP 296 #define enetc_setup_tc_txtime(ndev, type_data) -EOPNOTSUPP 297 #endif 298