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 } ____cacheline_aligned_in_smp; 76 77 static inline void enetc_bdr_idx_inc(struct enetc_bdr *bdr, int *i) 78 { 79 if (unlikely(++*i == bdr->bd_count)) 80 *i = 0; 81 } 82 83 static inline int enetc_bd_unused(struct enetc_bdr *bdr) 84 { 85 if (bdr->next_to_clean > bdr->next_to_use) 86 return bdr->next_to_clean - bdr->next_to_use - 1; 87 88 return bdr->bd_count + bdr->next_to_clean - bdr->next_to_use - 1; 89 } 90 91 /* Control BD ring */ 92 #define ENETC_CBDR_DEFAULT_SIZE 64 93 struct enetc_cbdr { 94 void *bd_base; /* points to Rx or Tx BD ring */ 95 void __iomem *pir; 96 void __iomem *cir; 97 98 int bd_count; /* # of BDs */ 99 int next_to_use; 100 int next_to_clean; 101 102 dma_addr_t bd_dma_base; 103 }; 104 105 #define ENETC_TXBD(BDR, i) (&(((union enetc_tx_bd *)((BDR).bd_base))[i])) 106 #define ENETC_RXBD(BDR, i) (&(((union enetc_rx_bd *)((BDR).bd_base))[i])) 107 108 struct enetc_msg_swbd { 109 void *vaddr; 110 dma_addr_t dma; 111 int size; 112 }; 113 114 #define ENETC_REV1 0x1 115 enum enetc_errata { 116 ENETC_ERR_TXCSUM = BIT(0), 117 ENETC_ERR_VLAN_ISOL = BIT(1), 118 ENETC_ERR_UCMCSWP = BIT(2), 119 }; 120 121 #define ENETC_SI_F_QBV BIT(0) 122 123 /* PCI IEP device data */ 124 struct enetc_si { 125 struct pci_dev *pdev; 126 struct enetc_hw hw; 127 enum enetc_errata errata; 128 129 struct net_device *ndev; /* back ref. */ 130 131 struct enetc_cbdr cbd_ring; 132 133 int num_rx_rings; /* how many rings are available in the SI */ 134 int num_tx_rings; 135 int num_fs_entries; 136 int num_rss; /* number of RSS buckets */ 137 unsigned short pad; 138 int hw_features; 139 }; 140 141 #define ENETC_SI_ALIGN 32 142 143 static inline void *enetc_si_priv(const struct enetc_si *si) 144 { 145 return (char *)si + ALIGN(sizeof(struct enetc_si), ENETC_SI_ALIGN); 146 } 147 148 static inline bool enetc_si_is_pf(struct enetc_si *si) 149 { 150 return !!(si->hw.port); 151 } 152 153 #define ENETC_MAX_NUM_TXQS 8 154 #define ENETC_INT_NAME_MAX (IFNAMSIZ + 8) 155 156 struct enetc_int_vector { 157 void __iomem *rbier; 158 void __iomem *tbier_base; 159 unsigned long tx_rings_map; 160 int count_tx_rings; 161 struct napi_struct napi; 162 char name[ENETC_INT_NAME_MAX]; 163 164 struct enetc_bdr rx_ring ____cacheline_aligned_in_smp; 165 struct enetc_bdr tx_ring[0]; 166 }; 167 168 struct enetc_cls_rule { 169 struct ethtool_rx_flow_spec fs; 170 int used; 171 }; 172 173 #define ENETC_MAX_BDR_INT 2 /* fixed to max # of available cpus */ 174 175 /* TODO: more hardware offloads */ 176 enum enetc_active_offloads { 177 ENETC_F_RX_TSTAMP = BIT(0), 178 ENETC_F_TX_TSTAMP = BIT(1), 179 ENETC_F_QBV = BIT(2), 180 }; 181 182 struct enetc_ndev_priv { 183 struct net_device *ndev; 184 struct device *dev; /* dma-mapping device */ 185 struct enetc_si *si; 186 187 int bdr_int_num; /* number of Rx/Tx ring interrupts */ 188 struct enetc_int_vector *int_vector[ENETC_MAX_BDR_INT]; 189 u16 num_rx_rings, num_tx_rings; 190 u16 rx_bd_count, tx_bd_count; 191 192 u16 msg_enable; 193 int active_offloads; 194 195 u32 speed; /* store speed for compare update pspeed */ 196 197 struct enetc_bdr *tx_ring[16]; 198 struct enetc_bdr *rx_ring[16]; 199 200 struct enetc_cls_rule *cls_rules; 201 202 struct device_node *phy_node; 203 phy_interface_t if_mode; 204 }; 205 206 /* Messaging */ 207 208 /* VF-PF set primary MAC address message format */ 209 struct enetc_msg_cmd_set_primary_mac { 210 struct enetc_msg_cmd_header header; 211 struct sockaddr mac; 212 }; 213 214 #define ENETC_CBD(R, i) (&(((struct enetc_cbd *)((R).bd_base))[i])) 215 216 #define ENETC_CBDR_TIMEOUT 1000 /* usecs */ 217 218 /* PTP driver exports */ 219 extern int enetc_phc_index; 220 221 /* SI common */ 222 int enetc_pci_probe(struct pci_dev *pdev, const char *name, int sizeof_priv); 223 void enetc_pci_remove(struct pci_dev *pdev); 224 int enetc_alloc_msix(struct enetc_ndev_priv *priv); 225 void enetc_free_msix(struct enetc_ndev_priv *priv); 226 void enetc_get_si_caps(struct enetc_si *si); 227 void enetc_init_si_rings_params(struct enetc_ndev_priv *priv); 228 int enetc_alloc_si_resources(struct enetc_ndev_priv *priv); 229 void enetc_free_si_resources(struct enetc_ndev_priv *priv); 230 231 int enetc_open(struct net_device *ndev); 232 int enetc_close(struct net_device *ndev); 233 netdev_tx_t enetc_xmit(struct sk_buff *skb, struct net_device *ndev); 234 struct net_device_stats *enetc_get_stats(struct net_device *ndev); 235 int enetc_set_features(struct net_device *ndev, 236 netdev_features_t features); 237 int enetc_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd); 238 int enetc_setup_tc(struct net_device *ndev, enum tc_setup_type type, 239 void *type_data); 240 241 /* ethtool */ 242 void enetc_set_ethtool_ops(struct net_device *ndev); 243 244 /* control buffer descriptor ring (CBDR) */ 245 int enetc_set_mac_flt_entry(struct enetc_si *si, int index, 246 char *mac_addr, int si_map); 247 int enetc_clear_mac_flt_entry(struct enetc_si *si, int index); 248 int enetc_set_fs_entry(struct enetc_si *si, struct enetc_cmd_rfse *rfse, 249 int index); 250 void enetc_set_rss_key(struct enetc_hw *hw, const u8 *bytes); 251 int enetc_get_rss_table(struct enetc_si *si, u32 *table, int count); 252 int enetc_set_rss_table(struct enetc_si *si, const u32 *table, int count); 253 int enetc_send_cmd(struct enetc_si *si, struct enetc_cbd *cbd); 254 255 #ifdef CONFIG_FSL_ENETC_QOS 256 int enetc_setup_tc_taprio(struct net_device *ndev, void *type_data); 257 void enetc_sched_speed_set(struct net_device *ndev); 258 int enetc_setup_tc_cbs(struct net_device *ndev, void *type_data); 259 #else 260 #define enetc_setup_tc_taprio(ndev, type_data) -EOPNOTSUPP 261 #define enetc_sched_speed_set(ndev) (void)0 262 #define enetc_setup_tc_cbs(ndev, type_data) -EOPNOTSUPP 263 #endif 264