2 * Copyright (c) 2014-2015 Hisilicon Limited.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
13 /* Names used in this framework:
15 * a set of queues provided by AE
16 * ring buffer queue (rbq):
17 * the channel between upper layer and the AE, can do tx and rx
19 * a tx or rx channel within a rbq
20 * ring description (desc):
21 * an element in the ring with packet information
23 * a memory region referred by desc with the full packet payload
25 * "num" means a static number set as a parameter, "count" mean a dynamic
26 * number set while running
27 * "cb" means control block
30 #include <linux/delay.h>
31 #include <linux/device.h>
32 #include <linux/module.h>
33 #include <linux/netdevice.h>
34 #include <linux/notifier.h>
35 #include <linux/phy.h>
36 #include <linux/types.h>
38 #define HNAE_DRIVER_VERSION "2.0"
39 #define HNAE_DRIVER_NAME "hns"
40 #define HNAE_COPYRIGHT "Copyright(c) 2015 Huawei Corporation."
41 #define HNAE_DRIVER_STRING "Hisilicon Network Subsystem Driver"
42 #define HNAE_DEFAULT_DEVICE_DESCR "Hisilicon Network Subsystem"
47 #define assert(expr) \
50 pr_err("Assertion failed! %s, %s, %s, line %d\n", \
51 #expr, __FILE__, __func__, __LINE__); \
64 #define AE_VERSION_1 ('6' << 16 | '6' << 8 | '0')
65 #define AE_VERSION_2 ('1' << 24 | '6' << 16 | '1' << 8 | '0')
66 #define AE_IS_VER1(ver) ((ver) == AE_VERSION_1)
67 #define AE_NAME_SIZE 16
69 /* some said the RX and TX RCB format should not be the same in the future. But
70 * it is the same now...
72 #define RCB_REG_BASEADDR_L 0x00 /* P660 support only 32bit accessing */
73 #define RCB_REG_BASEADDR_H 0x04
74 #define RCB_REG_BD_NUM 0x08
75 #define RCB_REG_BD_LEN 0x0C
76 #define RCB_REG_PKTLINE 0x10
77 #define RCB_REG_TAIL 0x18
78 #define RCB_REG_HEAD 0x1C
79 #define RCB_REG_FBDNUM 0x20
80 #define RCB_REG_OFFSET 0x24 /* pkt num to be handled */
81 #define RCB_REG_PKTNUM_RECORD 0x2C /* total pkt received */
83 #define HNS_RX_HEAD_SIZE 256
85 #define HNAE_AE_REGISTER 0x1
87 #define RCB_RING_NAME_LEN 16
96 #define HNS_RX_FLAG_VLAN_PRESENT 0x1
97 #define HNS_RX_FLAG_L3ID_IPV4 0x0
98 #define HNS_RX_FLAG_L3ID_IPV6 0x1
99 #define HNS_RX_FLAG_L4ID_UDP 0x0
100 #define HNS_RX_FLAG_L4ID_TCP 0x1
102 #define HNS_TXD_ASID_S 0
103 #define HNS_TXD_ASID_M (0xff << HNS_TXD_ASID_S)
104 #define HNS_TXD_BUFNUM_S 8
105 #define HNS_TXD_BUFNUM_M (0x3 << HNS_TXD_BUFNUM_S)
106 #define HNS_TXD_PORTID_S 10
107 #define HNS_TXD_PORTID_M (0x7 << HNS_TXD_PORTID_S)
109 #define HNS_TXD_RA_B 8
110 #define HNS_TXD_RI_B 9
111 #define HNS_TXD_L4CS_B 10
112 #define HNS_TXD_L3CS_B 11
113 #define HNS_TXD_FE_B 12
114 #define HNS_TXD_VLD_B 13
115 #define HNS_TXD_IPOFFSET_S 14
116 #define HNS_TXD_IPOFFSET_M (0xff << HNS_TXD_IPOFFSET_S)
118 #define HNS_RXD_IPOFFSET_S 0
119 #define HNS_RXD_IPOFFSET_M (0xff << HNS_TXD_IPOFFSET_S)
120 #define HNS_RXD_BUFNUM_S 8
121 #define HNS_RXD_BUFNUM_M (0x3 << HNS_RXD_BUFNUM_S)
122 #define HNS_RXD_PORTID_S 10
123 #define HNS_RXD_PORTID_M (0x7 << HNS_RXD_PORTID_S)
124 #define HNS_RXD_DMAC_S 13
125 #define HNS_RXD_DMAC_M (0x3 << HNS_RXD_DMAC_S)
126 #define HNS_RXD_VLAN_S 15
127 #define HNS_RXD_VLAN_M (0x3 << HNS_RXD_VLAN_S)
128 #define HNS_RXD_L3ID_S 17
129 #define HNS_RXD_L3ID_M (0xf << HNS_RXD_L3ID_S)
130 #define HNS_RXD_L4ID_S 21
131 #define HNS_RXD_L4ID_M (0xf << HNS_RXD_L4ID_S)
132 #define HNS_RXD_FE_B 25
133 #define HNS_RXD_FRAG_B 26
134 #define HNS_RXD_VLD_B 27
135 #define HNS_RXD_L2E_B 28
136 #define HNS_RXD_L3E_B 29
137 #define HNS_RXD_L4E_B 30
138 #define HNS_RXD_DROP_B 31
140 #define HNS_RXD_VLANID_S 8
141 #define HNS_RXD_VLANID_M (0xfff << HNS_RXD_VLANID_S)
142 #define HNS_RXD_CFI_B 20
143 #define HNS_RXD_PRI_S 21
144 #define HNS_RXD_PRI_M (0x7 << HNS_RXD_PRI_S)
145 #define HNS_RXD_ASID_S 24
146 #define HNS_RXD_ASID_M (0xff << HNS_RXD_ASID_S)
148 #define HNSV2_TXD_BUFNUM_S 0
149 #define HNSV2_TXD_BUFNUM_M (0x7 << HNSV2_TXD_BUFNUM_S)
150 #define HNSV2_TXD_RI_B 1
151 #define HNSV2_TXD_L4CS_B 2
152 #define HNSV2_TXD_L3CS_B 3
153 #define HNSV2_TXD_FE_B 4
154 #define HNSV2_TXD_VLD_B 5
156 #define HNSV2_TXD_TSE_B 0
157 #define HNSV2_TXD_VLAN_EN_B 1
158 #define HNSV2_TXD_SNAP_B 2
159 #define HNSV2_TXD_IPV6_B 3
160 #define HNSV2_TXD_SCTP_B 4
162 /* hardware spec ring buffer format */
163 struct __packed hnae_desc {
168 __le16 asid_bufnum_pid;
173 __le32 flag_ipoffset;
176 __u8 ra_ri_cs_fe_vld;
178 __u8 tse_vlan_snap_v6_sctp_nth;
191 __le32 ipoff_bnum_pid_flag;
195 __le32 vlan_pri_asid;
202 __le32 reserved_1[2];
207 struct hnae_desc_cb {
208 dma_addr_t dma; /* dma address of this desc */
209 void *buf; /* cpu addr for a desc */
211 /* priv data for the desc, e.g. skb when use with ip stack*/
216 u16 length; /* length of the buffer */
218 /* desc type, used by the ring user to mark the type of the priv data */
222 #define setflags(flags, bits) ((flags) |= (bits))
223 #define unsetflags(flags, bits) ((flags) &= ~(bits))
225 /* hnae_ring->flags fields */
226 #define RINGF_DIR 0x1 /* TX or RX ring, set if TX */
227 #define is_tx_ring(ring) ((ring)->flags & RINGF_DIR)
228 #define is_rx_ring(ring) (!is_tx_ring(ring))
229 #define ring_to_dma_dir(ring) (is_tx_ring(ring) ? \
230 DMA_TO_DEVICE : DMA_FROM_DEVICE)
261 u8 __iomem *io_base; /* base io address for the ring */
262 struct hnae_desc *desc; /* dma map address space */
263 struct hnae_desc_cb *desc_cb;
264 struct hnae_queue *q;
266 char ring_name[RCB_RING_NAME_LEN];
269 struct ring_stats stats;
271 dma_addr_t desc_dma_addr;
272 u32 buf_size; /* size for hnae_desc->addr, preset by AE */
273 u16 desc_num; /* total number of desc */
274 u16 max_desc_num_per_pkt;
275 u16 max_raw_data_sz_per_desc;
277 int next_to_use; /* idx of next spare desc */
279 /* idx of lastest sent desc, the ring is empty when equal to
284 int flags; /* ring attribute */
288 #define ring_ptr_move_fw(ring, p) \
289 ((ring)->p = ((ring)->p + 1) % (ring)->desc_num)
290 #define ring_ptr_move_bw(ring, p) \
291 ((ring)->p = ((ring)->p - 1 + (ring)->desc_num) % (ring)->desc_num)
298 #define assert_is_ring_idx(ring, idx) \
299 assert((idx) >= 0 && (idx) < (ring)->desc_num)
301 /* the distance between [begin, end) in a ring buffer
302 * note: there is a unuse slot between the begin and the end
304 static inline int ring_dist(struct hnae_ring *ring, int begin, int end)
306 assert_is_ring_idx(ring, begin);
307 assert_is_ring_idx(ring, end);
309 return (end - begin + ring->desc_num) % ring->desc_num;
312 static inline int ring_space(struct hnae_ring *ring)
314 return ring->desc_num -
315 ring_dist(ring, ring->next_to_clean, ring->next_to_use) - 1;
318 static inline int is_ring_empty(struct hnae_ring *ring)
320 assert_is_ring_idx(ring, ring->next_to_use);
321 assert_is_ring_idx(ring, ring->next_to_clean);
323 return ring->next_to_use == ring->next_to_clean;
326 #define hnae_buf_size(_ring) ((_ring)->buf_size)
327 #define hnae_page_order(_ring) (get_order(hnae_buf_size(_ring)))
328 #define hnae_page_size(_ring) (PAGE_SIZE << hnae_page_order(_ring))
332 /* allocate and dma map space for hnae desc */
333 struct hnae_buf_ops {
334 int (*alloc_buffer)(struct hnae_ring *ring, struct hnae_desc_cb *cb);
335 void (*free_buffer)(struct hnae_ring *ring, struct hnae_desc_cb *cb);
336 int (*map_buffer)(struct hnae_ring *ring, struct hnae_desc_cb *cb);
337 void (*unmap_buffer)(struct hnae_ring *ring, struct hnae_desc_cb *cb);
341 void __iomem *io_base;
342 phys_addr_t phy_base;
343 struct hnae_ae_dev *dev; /* the device who use this queue */
344 struct hnae_ring rx_ring ____cacheline_internodealigned_in_smp;
345 struct hnae_ring tx_ring ____cacheline_internodealigned_in_smp;
346 struct hnae_handle *handle;
351 MAC_INTERNALLOOP_MAC = 0,
352 MAC_INTERNALLOOP_SERDES,
353 MAC_INTERNALLOOP_PHY,
358 enum hnae_port_type {
359 HNAE_PORT_SERVICE = 0,
363 /* This struct defines the operation on the handle.
365 * get_handle(): (mandatory)
366 * Get a handle from AE according to its name and options.
367 * the AE driver should manage the space used by handle and its queues while
368 * the HNAE framework will allocate desc and desc_cb for all rings in the
371 * Release the handle.
373 * Enable the hardware, include all queues
375 * Disable the hardware
376 * set_opts(): (mandatory)
377 * Set options to the AE
378 * get_opts(): (mandatory)
379 * Get options from the AE
381 * Get the carrier state of the back channel of the handle, 1 for ok, 0 for
383 * toggle_ring_irq(): (mandatory)
384 * Set the ring irq to be enabled(0) or disable(1)
385 * toggle_queue_status(): (mandatory)
386 * Set the queue to be enabled(1) or disable(0), this will not change the
392 * get_ring_bdnum_limit()
393 * get ring bd number limit
395 * get tx and rx of pause frame use
397 * set auto autonegotiation of pause frame use
399 * get auto autonegotiation of pause frame use
401 * set tx and rx of pause frame use
402 * get_coalesce_usecs()
403 * get usecs to delay a TX interrupt after a packet is sent
404 * get_rx_max_coalesced_frames()
405 * get Maximum number of packets to be sent before a TX interrupt.
406 * set_coalesce_usecs()
407 * set usecs to delay a TX interrupt after a packet is sent
408 * set_coalesce_frames()
409 * set Maximum number of packets to be sent before a TX interrupt.
411 * get RX/TX ring number
413 * get RX/TX ring maximum number
423 * update Old network device statistics
424 * get_ethtool_stats()
425 * get ethtool network device statistics
427 * get a set of strings that describe the requested objects
429 * get number of strings that @get_strings will write
430 * update_led_status()
431 * update the led status
437 * get the len of the regs dump
440 struct hnae_handle *(*get_handle)(struct hnae_ae_dev *dev,
442 void (*put_handle)(struct hnae_handle *handle);
443 void (*init_queue)(struct hnae_queue *q);
444 void (*fini_queue)(struct hnae_queue *q);
445 int (*start)(struct hnae_handle *handle);
446 void (*stop)(struct hnae_handle *handle);
447 void (*reset)(struct hnae_handle *handle);
448 int (*set_opts)(struct hnae_handle *handle, int type, void *opts);
449 int (*get_opts)(struct hnae_handle *handle, int type, void **opts);
450 int (*get_status)(struct hnae_handle *handle);
451 int (*get_info)(struct hnae_handle *handle,
452 u8 *auto_neg, u16 *speed, u8 *duplex);
453 void (*toggle_ring_irq)(struct hnae_ring *ring, u32 val);
454 void (*toggle_queue_status)(struct hnae_queue *queue, u32 val);
455 void (*adjust_link)(struct hnae_handle *handle, int speed, int duplex);
456 int (*set_loopback)(struct hnae_handle *handle,
457 enum hnae_loop loop_mode, int en);
458 void (*get_ring_bdnum_limit)(struct hnae_queue *queue,
460 void (*get_pauseparam)(struct hnae_handle *handle,
461 u32 *auto_neg, u32 *rx_en, u32 *tx_en);
462 int (*set_autoneg)(struct hnae_handle *handle, u8 enable);
463 int (*get_autoneg)(struct hnae_handle *handle);
464 int (*set_pauseparam)(struct hnae_handle *handle,
465 u32 auto_neg, u32 rx_en, u32 tx_en);
466 void (*get_coalesce_usecs)(struct hnae_handle *handle,
467 u32 *tx_usecs, u32 *rx_usecs);
468 void (*get_rx_max_coalesced_frames)(struct hnae_handle *handle,
469 u32 *tx_frames, u32 *rx_frames);
470 void (*set_coalesce_usecs)(struct hnae_handle *handle, u32 timeout);
471 int (*set_coalesce_frames)(struct hnae_handle *handle,
472 u32 coalesce_frames);
473 void (*set_promisc_mode)(struct hnae_handle *handle, u32 en);
474 int (*get_mac_addr)(struct hnae_handle *handle, void **p);
475 int (*set_mac_addr)(struct hnae_handle *handle, void *p);
476 int (*set_mc_addr)(struct hnae_handle *handle, void *addr);
477 int (*set_mtu)(struct hnae_handle *handle, int new_mtu);
478 void (*set_tso_stats)(struct hnae_handle *handle, int enable);
479 void (*update_stats)(struct hnae_handle *handle,
480 struct net_device_stats *net_stats);
481 void (*get_stats)(struct hnae_handle *handle, u64 *data);
482 void (*get_strings)(struct hnae_handle *handle,
483 u32 stringset, u8 *data);
484 int (*get_sset_count)(struct hnae_handle *handle, int stringset);
485 void (*update_led_status)(struct hnae_handle *handle);
486 int (*set_led_id)(struct hnae_handle *handle,
487 enum hnae_led_state status);
488 void (*get_regs)(struct hnae_handle *handle, void *data);
489 int (*get_regs_len)(struct hnae_handle *handle);
490 u32 (*get_rss_key_size)(struct hnae_handle *handle);
491 u32 (*get_rss_indir_size)(struct hnae_handle *handle);
492 int (*get_rss)(struct hnae_handle *handle, u32 *indir, u8 *key,
494 int (*set_rss)(struct hnae_handle *handle, const u32 *indir,
495 const u8 *key, const u8 hfunc);
499 struct device cls_dev; /* the class dev */
500 struct device *dev; /* the presented dev */
501 struct hnae_ae_ops *ops;
502 struct list_head node;
503 struct module *owner; /* the module who provides this dev */
505 char name[AE_NAME_SIZE];
506 struct list_head handle_list;
507 spinlock_t lock; /* lock to protect the handle_list */
511 struct device *owner_dev; /* the device which make use of this handle */
512 struct hnae_ae_dev *dev; /* the device who provides this handle */
513 struct device_node *phy_node;
514 phy_interface_t phy_if;
519 enum hnae_port_type port_type;
520 struct list_head node; /* list to hnae_ae_dev->handle_list */
521 struct hnae_buf_ops *bops; /* operation for the buffer */
522 struct hnae_queue **qs; /* array base of all queues */
525 #define ring_to_dev(ring) ((ring)->q->dev->dev)
527 struct hnae_handle *hnae_get_handle(struct device *owner_dev,
528 const struct device_node *ae_node,
530 struct hnae_buf_ops *bops);
532 void hnae_put_handle(struct hnae_handle *handle);
533 int hnae_ae_register(struct hnae_ae_dev *dev, struct module *owner);
534 void hnae_ae_unregister(struct hnae_ae_dev *dev);
536 int hnae_register_notifier(struct notifier_block *nb);
537 void hnae_unregister_notifier(struct notifier_block *nb);
538 int hnae_reinit_handle(struct hnae_handle *handle);
540 #define hnae_queue_xmit(q, buf_num) writel_relaxed(buf_num, \
541 (q)->tx_ring.io_base + RCB_REG_TAIL)
547 static inline int hnae_reserve_buffer_map(struct hnae_ring *ring,
548 struct hnae_desc_cb *cb)
550 struct hnae_buf_ops *bops = ring->q->handle->bops;
553 ret = bops->alloc_buffer(ring, cb);
557 ret = bops->map_buffer(ring, cb);
564 bops->free_buffer(ring, cb);
569 static inline int hnae_alloc_buffer_attach(struct hnae_ring *ring, int i)
571 int ret = hnae_reserve_buffer_map(ring, &ring->desc_cb[i]);
576 ring->desc[i].addr = (__le64)ring->desc_cb[i].dma;
581 static inline void hnae_buffer_detach(struct hnae_ring *ring, int i)
583 ring->q->handle->bops->unmap_buffer(ring, &ring->desc_cb[i]);
584 ring->desc[i].addr = 0;
587 static inline void hnae_free_buffer_detach(struct hnae_ring *ring, int i)
589 struct hnae_buf_ops *bops = ring->q->handle->bops;
590 struct hnae_desc_cb *cb = &ring->desc_cb[i];
592 if (!ring->desc_cb[i].dma)
595 hnae_buffer_detach(ring, i);
596 bops->free_buffer(ring, cb);
599 /* detach a in-used buffer and replace with a reserved one */
600 static inline void hnae_replace_buffer(struct hnae_ring *ring, int i,
601 struct hnae_desc_cb *res_cb)
603 struct hnae_buf_ops *bops = ring->q->handle->bops;
605 bops->unmap_buffer(ring, &ring->desc_cb[i]);
606 ring->desc_cb[i] = *res_cb;
607 ring->desc[i].addr = (__le64)ring->desc_cb[i].dma;
608 ring->desc[i].rx.ipoff_bnum_pid_flag = 0;
611 static inline void hnae_reuse_buffer(struct hnae_ring *ring, int i)
613 ring->desc_cb[i].reuse_flag = 0;
614 ring->desc[i].addr = (__le64)(ring->desc_cb[i].dma
615 + ring->desc_cb[i].page_offset);
616 ring->desc[i].rx.ipoff_bnum_pid_flag = 0;
619 #define hnae_set_field(origin, mask, shift, val) \
621 (origin) &= (~(mask)); \
622 (origin) |= ((val) << (shift)) & (mask); \
625 #define hnae_set_bit(origin, shift, val) \
626 hnae_set_field((origin), (0x1 << (shift)), (shift), (val))
628 #define hnae_get_field(origin, mask, shift) (((origin) & (mask)) >> (shift))
630 #define hnae_get_bit(origin, shift) \
631 hnae_get_field((origin), (0x1 << (shift)), (shift))