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 /* PCI IEP device data */ 122 struct enetc_si { 123 struct pci_dev *pdev; 124 struct enetc_hw hw; 125 enum enetc_errata errata; 126 127 struct net_device *ndev; /* back ref. */ 128 129 struct enetc_cbdr cbd_ring; 130 131 int num_rx_rings; /* how many rings are available in the SI */ 132 int num_tx_rings; 133 int num_fs_entries; 134 int num_rss; /* number of RSS buckets */ 135 unsigned short pad; 136 }; 137 138 #define ENETC_SI_ALIGN 32 139 140 static inline void *enetc_si_priv(const struct enetc_si *si) 141 { 142 return (char *)si + ALIGN(sizeof(struct enetc_si), ENETC_SI_ALIGN); 143 } 144 145 static inline bool enetc_si_is_pf(struct enetc_si *si) 146 { 147 return !!(si->hw.port); 148 } 149 150 #define ENETC_MAX_NUM_TXQS 8 151 #define ENETC_INT_NAME_MAX (IFNAMSIZ + 8) 152 153 struct enetc_int_vector { 154 void __iomem *rbier; 155 void __iomem *tbier_base; 156 unsigned long tx_rings_map; 157 int count_tx_rings; 158 struct napi_struct napi; 159 char name[ENETC_INT_NAME_MAX]; 160 161 struct enetc_bdr rx_ring ____cacheline_aligned_in_smp; 162 struct enetc_bdr tx_ring[0]; 163 }; 164 165 struct enetc_cls_rule { 166 struct ethtool_rx_flow_spec fs; 167 int used; 168 }; 169 170 #define ENETC_MAX_BDR_INT 2 /* fixed to max # of available cpus */ 171 172 /* TODO: more hardware offloads */ 173 enum enetc_active_offloads { 174 ENETC_F_RX_TSTAMP = BIT(0), 175 ENETC_F_TX_TSTAMP = BIT(1), 176 }; 177 178 struct enetc_ndev_priv { 179 struct net_device *ndev; 180 struct device *dev; /* dma-mapping device */ 181 struct enetc_si *si; 182 183 int bdr_int_num; /* number of Rx/Tx ring interrupts */ 184 struct enetc_int_vector *int_vector[ENETC_MAX_BDR_INT]; 185 u16 num_rx_rings, num_tx_rings; 186 u16 rx_bd_count, tx_bd_count; 187 188 u16 msg_enable; 189 int active_offloads; 190 191 struct enetc_bdr *tx_ring[16]; 192 struct enetc_bdr *rx_ring[16]; 193 194 struct enetc_cls_rule *cls_rules; 195 196 struct device_node *phy_node; 197 phy_interface_t if_mode; 198 }; 199 200 /* Messaging */ 201 202 /* VF-PF set primary MAC address message format */ 203 struct enetc_msg_cmd_set_primary_mac { 204 struct enetc_msg_cmd_header header; 205 struct sockaddr mac; 206 }; 207 208 #define ENETC_CBD(R, i) (&(((struct enetc_cbd *)((R).bd_base))[i])) 209 210 #define ENETC_CBDR_TIMEOUT 1000 /* usecs */ 211 212 /* PTP driver exports */ 213 extern int enetc_phc_index; 214 215 /* SI common */ 216 int enetc_pci_probe(struct pci_dev *pdev, const char *name, int sizeof_priv); 217 void enetc_pci_remove(struct pci_dev *pdev); 218 int enetc_alloc_msix(struct enetc_ndev_priv *priv); 219 void enetc_free_msix(struct enetc_ndev_priv *priv); 220 void enetc_get_si_caps(struct enetc_si *si); 221 void enetc_init_si_rings_params(struct enetc_ndev_priv *priv); 222 int enetc_alloc_si_resources(struct enetc_ndev_priv *priv); 223 void enetc_free_si_resources(struct enetc_ndev_priv *priv); 224 225 int enetc_open(struct net_device *ndev); 226 int enetc_close(struct net_device *ndev); 227 netdev_tx_t enetc_xmit(struct sk_buff *skb, struct net_device *ndev); 228 struct net_device_stats *enetc_get_stats(struct net_device *ndev); 229 int enetc_set_features(struct net_device *ndev, 230 netdev_features_t features); 231 int enetc_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd); 232 int enetc_setup_tc(struct net_device *ndev, enum tc_setup_type type, 233 void *type_data); 234 235 /* ethtool */ 236 void enetc_set_ethtool_ops(struct net_device *ndev); 237 238 /* control buffer descriptor ring (CBDR) */ 239 int enetc_set_mac_flt_entry(struct enetc_si *si, int index, 240 char *mac_addr, int si_map); 241 int enetc_clear_mac_flt_entry(struct enetc_si *si, int index); 242 int enetc_set_fs_entry(struct enetc_si *si, struct enetc_cmd_rfse *rfse, 243 int index); 244 void enetc_set_rss_key(struct enetc_hw *hw, const u8 *bytes); 245 int enetc_get_rss_table(struct enetc_si *si, u32 *table, int count); 246 int enetc_set_rss_table(struct enetc_si *si, const u32 *table, int count); 247