1 /* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
2 /* Copyright 2017-2019 NXP */
4 #include <linux/timer.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/phylink.h>
13 #include <linux/dim.h>
17 #define ENETC_MAC_MAXFRM_SIZE 9600
18 #define ENETC_MAX_MTU (ENETC_MAC_MAXFRM_SIZE - \
19 (ETH_FCS_LEN + ETH_HLEN + VLAN_HLEN))
21 struct enetc_tx_swbd {
30 #define ENETC_RX_MAXFRM_SIZE ENETC_MAC_MAXFRM_SIZE
31 #define ENETC_RXB_TRUESIZE 2048 /* PAGE_SIZE >> 1 */
32 #define ENETC_RXB_PAD NET_SKB_PAD /* add extra space if needed */
33 #define ENETC_RXB_DMA_SIZE \
34 (SKB_WITH_OVERHEAD(ENETC_RXB_TRUESIZE) - ENETC_RXB_PAD)
36 struct enetc_rx_swbd {
42 struct enetc_ring_stats {
45 unsigned int rx_alloc_errs;
48 #define ENETC_RX_RING_DEFAULT_SIZE 512
49 #define ENETC_TX_RING_DEFAULT_SIZE 256
50 #define ENETC_DEFAULT_TX_WORK (ENETC_TX_RING_DEFAULT_SIZE / 2)
53 struct device *dev; /* for DMA mapping */
54 struct net_device *ndev;
55 void *bd_base; /* points to Rx or Tx BD ring */
61 int bd_count; /* # of BDs */
65 struct enetc_tx_swbd *tx_swbd;
66 struct enetc_rx_swbd *rx_swbd;
69 void __iomem *tcir; /* Tx */
70 int next_to_alloc; /* Rx */
72 void __iomem *idr; /* Interrupt Detect Register pointer */
74 struct enetc_ring_stats stats;
76 dma_addr_t bd_dma_base;
77 u8 tsd_enable; /* Time specific departure */
78 bool ext_en; /* enable h/w descriptor extensions */
79 } ____cacheline_aligned_in_smp;
81 static inline void enetc_bdr_idx_inc(struct enetc_bdr *bdr, int *i)
83 if (unlikely(++*i == bdr->bd_count))
87 static inline int enetc_bd_unused(struct enetc_bdr *bdr)
89 if (bdr->next_to_clean > bdr->next_to_use)
90 return bdr->next_to_clean - bdr->next_to_use - 1;
92 return bdr->bd_count + bdr->next_to_clean - bdr->next_to_use - 1;
96 #define ENETC_CBDR_DEFAULT_SIZE 64
98 void *bd_base; /* points to Rx or Tx BD ring */
102 int bd_count; /* # of BDs */
106 dma_addr_t bd_dma_base;
109 #define ENETC_TXBD(BDR, i) (&(((union enetc_tx_bd *)((BDR).bd_base))[i]))
111 static inline union enetc_rx_bd *enetc_rxbd(struct enetc_bdr *rx_ring, int i)
115 #ifdef CONFIG_FSL_ENETC_PTP_CLOCK
119 return &(((union enetc_rx_bd *)rx_ring->bd_base)[hw_idx]);
122 static inline union enetc_rx_bd *enetc_rxbd_next(struct enetc_bdr *rx_ring,
123 union enetc_rx_bd *rxbd,
127 #ifdef CONFIG_FSL_ENETC_PTP_CLOCK
131 if (unlikely(++i == rx_ring->bd_count))
132 rxbd = rx_ring->bd_base;
137 static inline union enetc_rx_bd *enetc_rxbd_ext(union enetc_rx_bd *rxbd)
142 struct enetc_msg_swbd {
148 #define ENETC_REV1 0x1
150 ENETC_ERR_VLAN_ISOL = BIT(0),
151 ENETC_ERR_UCMCSWP = BIT(1),
154 #define ENETC_SI_F_QBV BIT(0)
155 #define ENETC_SI_F_PSFP BIT(1)
157 /* PCI IEP device data */
159 struct pci_dev *pdev;
161 enum enetc_errata errata;
163 struct net_device *ndev; /* back ref. */
165 struct enetc_cbdr cbd_ring;
167 int num_rx_rings; /* how many rings are available in the SI */
170 int num_rss; /* number of RSS buckets */
175 #define ENETC_SI_ALIGN 32
177 static inline void *enetc_si_priv(const struct enetc_si *si)
179 return (char *)si + ALIGN(sizeof(struct enetc_si), ENETC_SI_ALIGN);
182 static inline bool enetc_si_is_pf(struct enetc_si *si)
184 return !!(si->hw.port);
187 #define ENETC_MAX_NUM_TXQS 8
188 #define ENETC_INT_NAME_MAX (IFNAMSIZ + 8)
190 struct enetc_int_vector {
192 void __iomem *tbier_base;
194 unsigned long tx_rings_map;
198 bool rx_dim_en, rx_napi_work;
199 struct napi_struct napi ____cacheline_aligned_in_smp;
200 struct dim rx_dim ____cacheline_aligned_in_smp;
201 char name[ENETC_INT_NAME_MAX];
203 struct enetc_bdr rx_ring;
204 struct enetc_bdr tx_ring[];
205 } ____cacheline_aligned_in_smp;
207 struct enetc_cls_rule {
208 struct ethtool_rx_flow_spec fs;
212 #define ENETC_MAX_BDR_INT 2 /* fixed to max # of available cpus */
217 u32 max_psfp_gatelist;
221 /* TODO: more hardware offloads */
222 enum enetc_active_offloads {
223 ENETC_F_RX_TSTAMP = BIT(0),
224 ENETC_F_TX_TSTAMP = BIT(1),
225 ENETC_F_QBV = BIT(2),
226 ENETC_F_QCI = BIT(3),
229 /* interrupt coalescing modes */
231 /* one interrupt per frame */
233 /* activated when int coalescing time is set to a non-0 value */
234 ENETC_IC_RX_MANUAL = BIT(0),
235 ENETC_IC_TX_MANUAL = BIT(1),
236 /* use dynamic interrupt moderation */
237 ENETC_IC_RX_ADAPTIVE = BIT(2),
240 #define ENETC_RXIC_PKTTHR min_t(u32, 256, ENETC_RX_RING_DEFAULT_SIZE / 2)
241 #define ENETC_TXIC_PKTTHR min_t(u32, 128, ENETC_TX_RING_DEFAULT_SIZE / 2)
242 #define ENETC_TXIC_TIMETHR enetc_usecs_to_cycles(600)
244 struct enetc_ndev_priv {
245 struct net_device *ndev;
246 struct device *dev; /* dma-mapping device */
249 int bdr_int_num; /* number of Rx/Tx ring interrupts */
250 struct enetc_int_vector *int_vector[ENETC_MAX_BDR_INT];
251 u16 num_rx_rings, num_tx_rings;
252 u16 rx_bd_count, tx_bd_count;
257 u32 speed; /* store speed for compare update pspeed */
259 struct enetc_bdr *tx_ring[16];
260 struct enetc_bdr *rx_ring[16];
262 struct enetc_cls_rule *cls_rules;
264 struct psfp_cap psfp_cap;
266 struct phylink *phylink;
273 /* VF-PF set primary MAC address message format */
274 struct enetc_msg_cmd_set_primary_mac {
275 struct enetc_msg_cmd_header header;
279 #define ENETC_CBD(R, i) (&(((struct enetc_cbd *)((R).bd_base))[i]))
281 #define ENETC_CBDR_TIMEOUT 1000 /* usecs */
283 /* PTP driver exports */
284 extern int enetc_phc_index;
287 int enetc_pci_probe(struct pci_dev *pdev, const char *name, int sizeof_priv);
288 void enetc_pci_remove(struct pci_dev *pdev);
289 int enetc_alloc_msix(struct enetc_ndev_priv *priv);
290 void enetc_free_msix(struct enetc_ndev_priv *priv);
291 void enetc_get_si_caps(struct enetc_si *si);
292 void enetc_init_si_rings_params(struct enetc_ndev_priv *priv);
293 int enetc_alloc_si_resources(struct enetc_ndev_priv *priv);
294 void enetc_free_si_resources(struct enetc_ndev_priv *priv);
296 int enetc_open(struct net_device *ndev);
297 int enetc_close(struct net_device *ndev);
298 void enetc_start(struct net_device *ndev);
299 void enetc_stop(struct net_device *ndev);
300 netdev_tx_t enetc_xmit(struct sk_buff *skb, struct net_device *ndev);
301 struct net_device_stats *enetc_get_stats(struct net_device *ndev);
302 int enetc_set_features(struct net_device *ndev,
303 netdev_features_t features);
304 int enetc_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd);
305 int enetc_setup_tc(struct net_device *ndev, enum tc_setup_type type,
309 void enetc_set_ethtool_ops(struct net_device *ndev);
311 /* control buffer descriptor ring (CBDR) */
312 int enetc_set_mac_flt_entry(struct enetc_si *si, int index,
313 char *mac_addr, int si_map);
314 int enetc_clear_mac_flt_entry(struct enetc_si *si, int index);
315 int enetc_set_fs_entry(struct enetc_si *si, struct enetc_cmd_rfse *rfse,
317 void enetc_set_rss_key(struct enetc_hw *hw, const u8 *bytes);
318 int enetc_get_rss_table(struct enetc_si *si, u32 *table, int count);
319 int enetc_set_rss_table(struct enetc_si *si, const u32 *table, int count);
320 int enetc_send_cmd(struct enetc_si *si, struct enetc_cbd *cbd);
322 #ifdef CONFIG_FSL_ENETC_QOS
323 int enetc_setup_tc_taprio(struct net_device *ndev, void *type_data);
324 void enetc_sched_speed_set(struct enetc_ndev_priv *priv, int speed);
325 int enetc_setup_tc_cbs(struct net_device *ndev, void *type_data);
326 int enetc_setup_tc_txtime(struct net_device *ndev, void *type_data);
327 int enetc_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
329 int enetc_setup_tc_psfp(struct net_device *ndev, void *type_data);
330 int enetc_psfp_init(struct enetc_ndev_priv *priv);
331 int enetc_psfp_clean(struct enetc_ndev_priv *priv);
333 static inline void enetc_get_max_cap(struct enetc_ndev_priv *priv)
337 reg = enetc_port_rd(&priv->si->hw, ENETC_PSIDCAPR);
338 priv->psfp_cap.max_streamid = reg & ENETC_PSIDCAPR_MSK;
339 /* Port stream filter capability */
340 reg = enetc_port_rd(&priv->si->hw, ENETC_PSFCAPR);
341 priv->psfp_cap.max_psfp_filter = reg & ENETC_PSFCAPR_MSK;
342 /* Port stream gate capability */
343 reg = enetc_port_rd(&priv->si->hw, ENETC_PSGCAPR);
344 priv->psfp_cap.max_psfp_gate = (reg & ENETC_PSGCAPR_SGIT_MSK);
345 priv->psfp_cap.max_psfp_gatelist = (reg & ENETC_PSGCAPR_GCL_MSK) >> 16;
346 /* Port flow meter capability */
347 reg = enetc_port_rd(&priv->si->hw, ENETC_PFMCAPR);
348 priv->psfp_cap.max_psfp_meter = reg & ENETC_PFMCAPR_MSK;
351 static inline int enetc_psfp_enable(struct enetc_ndev_priv *priv)
353 struct enetc_hw *hw = &priv->si->hw;
356 enetc_get_max_cap(priv);
358 err = enetc_psfp_init(priv);
362 enetc_wr(hw, ENETC_PPSFPMR, enetc_rd(hw, ENETC_PPSFPMR) |
363 ENETC_PPSFPMR_PSFPEN | ENETC_PPSFPMR_VS |
364 ENETC_PPSFPMR_PVC | ENETC_PPSFPMR_PVZC);
369 static inline int enetc_psfp_disable(struct enetc_ndev_priv *priv)
371 struct enetc_hw *hw = &priv->si->hw;
374 err = enetc_psfp_clean(priv);
378 enetc_wr(hw, ENETC_PPSFPMR, enetc_rd(hw, ENETC_PPSFPMR) &
379 ~ENETC_PPSFPMR_PSFPEN & ~ENETC_PPSFPMR_VS &
380 ~ENETC_PPSFPMR_PVC & ~ENETC_PPSFPMR_PVZC);
382 memset(&priv->psfp_cap, 0, sizeof(struct psfp_cap));
388 #define enetc_setup_tc_taprio(ndev, type_data) -EOPNOTSUPP
389 #define enetc_sched_speed_set(priv, speed) (void)0
390 #define enetc_setup_tc_cbs(ndev, type_data) -EOPNOTSUPP
391 #define enetc_setup_tc_txtime(ndev, type_data) -EOPNOTSUPP
392 #define enetc_setup_tc_psfp(ndev, type_data) -EOPNOTSUPP
393 #define enetc_setup_tc_block_cb NULL
395 #define enetc_get_max_cap(p) \
396 memset(&((p)->psfp_cap), 0, sizeof(struct psfp_cap))
398 static inline int enetc_psfp_enable(struct enetc_ndev_priv *priv)
403 static inline int enetc_psfp_disable(struct enetc_ndev_priv *priv)