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 } ____cacheline_aligned_in_smp; 77 78 static inline void enetc_bdr_idx_inc(struct enetc_bdr *bdr, int *i) 79 { 80 if (unlikely(++*i == bdr->bd_count)) 81 *i = 0; 82 } 83 84 static inline int enetc_bd_unused(struct enetc_bdr *bdr) 85 { 86 if (bdr->next_to_clean > bdr->next_to_use) 87 return bdr->next_to_clean - bdr->next_to_use - 1; 88 89 return bdr->bd_count + bdr->next_to_clean - bdr->next_to_use - 1; 90 } 91 92 /* Control BD ring */ 93 #define ENETC_CBDR_DEFAULT_SIZE 64 94 struct enetc_cbdr { 95 void *bd_base; /* points to Rx or Tx BD ring */ 96 void __iomem *pir; 97 void __iomem *cir; 98 99 int bd_count; /* # of BDs */ 100 int next_to_use; 101 int next_to_clean; 102 103 dma_addr_t bd_dma_base; 104 }; 105 106 #define ENETC_TXBD(BDR, i) (&(((union enetc_tx_bd *)((BDR).bd_base))[i])) 107 #define ENETC_RXBD(BDR, i) (&(((union enetc_rx_bd *)((BDR).bd_base))[i])) 108 109 struct enetc_msg_swbd { 110 void *vaddr; 111 dma_addr_t dma; 112 int size; 113 }; 114 115 #define ENETC_REV1 0x1 116 enum enetc_errata { 117 ENETC_ERR_TXCSUM = BIT(0), 118 ENETC_ERR_VLAN_ISOL = BIT(1), 119 ENETC_ERR_UCMCSWP = BIT(2), 120 }; 121 122 #define ENETC_SI_F_QBV BIT(0) 123 124 /* PCI IEP device data */ 125 struct enetc_si { 126 struct pci_dev *pdev; 127 struct enetc_hw hw; 128 enum enetc_errata errata; 129 130 struct net_device *ndev; /* back ref. */ 131 132 struct enetc_cbdr cbd_ring; 133 134 int num_rx_rings; /* how many rings are available in the SI */ 135 int num_tx_rings; 136 int num_fs_entries; 137 int num_rss; /* number of RSS buckets */ 138 unsigned short pad; 139 int hw_features; 140 }; 141 142 #define ENETC_SI_ALIGN 32 143 144 static inline void *enetc_si_priv(const struct enetc_si *si) 145 { 146 return (char *)si + ALIGN(sizeof(struct enetc_si), ENETC_SI_ALIGN); 147 } 148 149 static inline bool enetc_si_is_pf(struct enetc_si *si) 150 { 151 return !!(si->hw.port); 152 } 153 154 #define ENETC_MAX_NUM_TXQS 8 155 #define ENETC_INT_NAME_MAX (IFNAMSIZ + 8) 156 157 struct enetc_int_vector { 158 void __iomem *rbier; 159 void __iomem *tbier_base; 160 unsigned long tx_rings_map; 161 int count_tx_rings; 162 struct napi_struct napi; 163 char name[ENETC_INT_NAME_MAX]; 164 165 struct enetc_bdr rx_ring ____cacheline_aligned_in_smp; 166 struct enetc_bdr tx_ring[0]; 167 }; 168 169 struct enetc_cls_rule { 170 struct ethtool_rx_flow_spec fs; 171 int used; 172 }; 173 174 #define ENETC_MAX_BDR_INT 2 /* fixed to max # of available cpus */ 175 176 /* TODO: more hardware offloads */ 177 enum enetc_active_offloads { 178 ENETC_F_RX_TSTAMP = BIT(0), 179 ENETC_F_TX_TSTAMP = BIT(1), 180 ENETC_F_QBV = BIT(2), 181 }; 182 183 struct enetc_ndev_priv { 184 struct net_device *ndev; 185 struct device *dev; /* dma-mapping device */ 186 struct enetc_si *si; 187 188 int bdr_int_num; /* number of Rx/Tx ring interrupts */ 189 struct enetc_int_vector *int_vector[ENETC_MAX_BDR_INT]; 190 u16 num_rx_rings, num_tx_rings; 191 u16 rx_bd_count, tx_bd_count; 192 193 u16 msg_enable; 194 int active_offloads; 195 196 u32 speed; /* store speed for compare update pspeed */ 197 198 struct enetc_bdr *tx_ring[16]; 199 struct enetc_bdr *rx_ring[16]; 200 201 struct enetc_cls_rule *cls_rules; 202 203 struct device_node *phy_node; 204 phy_interface_t if_mode; 205 }; 206 207 /* Messaging */ 208 209 /* VF-PF set primary MAC address message format */ 210 struct enetc_msg_cmd_set_primary_mac { 211 struct enetc_msg_cmd_header header; 212 struct sockaddr mac; 213 }; 214 215 #define ENETC_CBD(R, i) (&(((struct enetc_cbd *)((R).bd_base))[i])) 216 217 #define ENETC_CBDR_TIMEOUT 1000 /* usecs */ 218 219 /* PTP driver exports */ 220 extern int enetc_phc_index; 221 222 /* SI common */ 223 int enetc_pci_probe(struct pci_dev *pdev, const char *name, int sizeof_priv); 224 void enetc_pci_remove(struct pci_dev *pdev); 225 int enetc_alloc_msix(struct enetc_ndev_priv *priv); 226 void enetc_free_msix(struct enetc_ndev_priv *priv); 227 void enetc_get_si_caps(struct enetc_si *si); 228 void enetc_init_si_rings_params(struct enetc_ndev_priv *priv); 229 int enetc_alloc_si_resources(struct enetc_ndev_priv *priv); 230 void enetc_free_si_resources(struct enetc_ndev_priv *priv); 231 232 int enetc_open(struct net_device *ndev); 233 int enetc_close(struct net_device *ndev); 234 netdev_tx_t enetc_xmit(struct sk_buff *skb, struct net_device *ndev); 235 struct net_device_stats *enetc_get_stats(struct net_device *ndev); 236 int enetc_set_features(struct net_device *ndev, 237 netdev_features_t features); 238 int enetc_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd); 239 int enetc_setup_tc(struct net_device *ndev, enum tc_setup_type type, 240 void *type_data); 241 242 /* ethtool */ 243 void enetc_set_ethtool_ops(struct net_device *ndev); 244 245 /* control buffer descriptor ring (CBDR) */ 246 int enetc_set_mac_flt_entry(struct enetc_si *si, int index, 247 char *mac_addr, int si_map); 248 int enetc_clear_mac_flt_entry(struct enetc_si *si, int index); 249 int enetc_set_fs_entry(struct enetc_si *si, struct enetc_cmd_rfse *rfse, 250 int index); 251 void enetc_set_rss_key(struct enetc_hw *hw, const u8 *bytes); 252 int enetc_get_rss_table(struct enetc_si *si, u32 *table, int count); 253 int enetc_set_rss_table(struct enetc_si *si, const u32 *table, int count); 254 int enetc_send_cmd(struct enetc_si *si, struct enetc_cbd *cbd); 255 256 #ifdef CONFIG_FSL_ENETC_QOS 257 int enetc_setup_tc_taprio(struct net_device *ndev, void *type_data); 258 void enetc_sched_speed_set(struct net_device *ndev); 259 int enetc_setup_tc_cbs(struct net_device *ndev, void *type_data); 260 int enetc_setup_tc_txtime(struct net_device *ndev, void *type_data); 261 #else 262 #define enetc_setup_tc_taprio(ndev, type_data) -EOPNOTSUPP 263 #define enetc_sched_speed_set(ndev) (void)0 264 #define enetc_setup_tc_cbs(ndev, type_data) -EOPNOTSUPP 265 #define enetc_setup_tc_txtime(ndev, type_data) -EOPNOTSUPP 266 #endif 267