1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Copyright (c) 2014-2015 Hisilicon Limited.
4 */
5
6#ifndef __HNAE_H
7#define __HNAE_H
8
9/* Names used in this framework:
10 * ae handle (handle):
11 * a set of queues provided by AE
12 * ring buffer queue (rbq):
13 * the channel between upper layer and the AE, can do tx and rx
14 * ring:
15 * a tx or rx channel within a rbq
16 * ring description (desc):
17 * an element in the ring with packet information
18 * buffer:
19 * a memory region referred by desc with the full packet payload
20 *
21 * "num" means a static number set as a parameter, "count" mean a dynamic
22 * number set while running
23 * "cb" means control block
24 */
25
26#include <linux/acpi.h>
27#include <linux/delay.h>
28#include <linux/device.h>
29#include <linux/module.h>
30#include <linux/netdevice.h>
31#include <linux/notifier.h>
32#include <linux/phy.h>
33#include <linux/types.h>
34
35#define HNAE_DRIVER_VERSION "2.0"
36#define HNAE_DRIVER_NAME "hns"
37#define HNAE_COPYRIGHT "Copyright(c) 2015 Huawei Corporation."
38#define HNAE_DRIVER_STRING "Hisilicon Network Subsystem Driver"
39#define HNAE_DEFAULT_DEVICE_DESCR "Hisilicon Network Subsystem"
40
41#ifdef DEBUG
42
43#ifndef assert
44#define assert(expr) \
45do { \
46 if (!(expr)) { \
47 pr_err("Assertion failed! %s, %s, %s, line %d\n", \
48 #expr, __FILE__, __func__, __LINE__); \
49 } \
50} while (0)
51#endif
52
53#else
54
55#ifndef assert
56#define assert(expr)
57#endif
58
59#endif
60
61#define AE_VERSION_1 ('6' << 16 | '6' << 8 | '0')
62#define AE_VERSION_2 ('1' << 24 | '6' << 16 | '1' << 8 | '0')
63#define AE_IS_VER1(ver) ((ver) == AE_VERSION_1)
64#define AE_NAME_SIZE 16
65
66#define BD_SIZE_2048_MAX_MTU 6000
67
68/* some said the RX and TX RCB format should not be the same in the future. But
69 * it is the same now...
70 */
71#define RCB_REG_BASEADDR_L 0x00 /* P660 support only 32bit accessing */
72#define RCB_REG_BASEADDR_H 0x04
73#define RCB_REG_BD_NUM 0x08
74#define RCB_REG_BD_LEN 0x0C
75#define RCB_REG_PKTLINE 0x10
76#define RCB_REG_TAIL 0x18
77#define RCB_REG_HEAD 0x1C
78#define RCB_REG_FBDNUM 0x20
79#define RCB_REG_OFFSET 0x24 /* pkt num to be handled */
80#define RCB_REG_PKTNUM_RECORD 0x2C /* total pkt received */
81
82#define HNS_RX_HEAD_SIZE 256
83
84#define HNAE_AE_REGISTER 0x1
85
86#define RCB_RING_NAME_LEN (IFNAMSIZ + 4)
87
88#define HNAE_LOWEST_LATENCY_COAL_PARAM 30
89#define HNAE_LOW_LATENCY_COAL_PARAM 80
90#define HNAE_BULK_LATENCY_COAL_PARAM 150
91
92enum hnae_led_state {
93 HNAE_LED_INACTIVE,
94 HNAE_LED_ACTIVE,
95 HNAE_LED_ON,
96 HNAE_LED_OFF
97};
98
99#define HNS_RX_FLAG_VLAN_PRESENT 0x1
100#define HNS_RX_FLAG_L3ID_IPV4 0x0
101#define HNS_RX_FLAG_L3ID_IPV6 0x1
102#define HNS_RX_FLAG_L4ID_UDP 0x0
103#define HNS_RX_FLAG_L4ID_TCP 0x1
104#define HNS_RX_FLAG_L4ID_SCTP 0x3
105
106#define HNS_TXD_ASID_S 0
107#define HNS_TXD_ASID_M (0xff << HNS_TXD_ASID_S)
108#define HNS_TXD_BUFNUM_S 8
109#define HNS_TXD_BUFNUM_M (0x3 << HNS_TXD_BUFNUM_S)
110#define HNS_TXD_PORTID_S 10
111#define HNS_TXD_PORTID_M (0x7 << HNS_TXD_PORTID_S)
112
113#define HNS_TXD_RA_B 8
114#define HNS_TXD_RI_B 9
115#define HNS_TXD_L4CS_B 10
116#define HNS_TXD_L3CS_B 11
117#define HNS_TXD_FE_B 12
118#define HNS_TXD_VLD_B 13
119#define HNS_TXD_IPOFFSET_S 14
120#define HNS_TXD_IPOFFSET_M (0xff << HNS_TXD_IPOFFSET_S)
121
122#define HNS_RXD_IPOFFSET_S 0
123#define HNS_RXD_IPOFFSET_M (0xff << HNS_TXD_IPOFFSET_S)
124#define HNS_RXD_BUFNUM_S 8
125#define HNS_RXD_BUFNUM_M (0x3 << HNS_RXD_BUFNUM_S)
126#define HNS_RXD_PORTID_S 10
127#define HNS_RXD_PORTID_M (0x7 << HNS_RXD_PORTID_S)
128#define HNS_RXD_DMAC_S 13
129#define HNS_RXD_DMAC_M (0x3 << HNS_RXD_DMAC_S)
130#define HNS_RXD_VLAN_S 15
131#define HNS_RXD_VLAN_M (0x3 << HNS_RXD_VLAN_S)
132#define HNS_RXD_L3ID_S 17
133#define HNS_RXD_L3ID_M (0xf << HNS_RXD_L3ID_S)
134#define HNS_RXD_L4ID_S 21
135#define HNS_RXD_L4ID_M (0xf << HNS_RXD_L4ID_S)
136#define HNS_RXD_FE_B 25
137#define HNS_RXD_FRAG_B 26
138#define HNS_RXD_VLD_B 27
139#define HNS_RXD_L2E_B 28
140#define HNS_RXD_L3E_B 29
141#define HNS_RXD_L4E_B 30
142#define HNS_RXD_DROP_B 31
143
144#define HNS_RXD_VLANID_S 8
145#define HNS_RXD_VLANID_M (0xfff << HNS_RXD_VLANID_S)
146#define HNS_RXD_CFI_B 20
147#define HNS_RXD_PRI_S 21
148#define HNS_RXD_PRI_M (0x7 << HNS_RXD_PRI_S)
149#define HNS_RXD_ASID_S 24
150#define HNS_RXD_ASID_M (0xff << HNS_RXD_ASID_S)
151
152#define HNSV2_TXD_BUFNUM_S 0
153#define HNSV2_TXD_BUFNUM_M (0x7 << HNSV2_TXD_BUFNUM_S)
154#define HNSV2_TXD_PORTID_S 4
155#define HNSV2_TXD_PORTID_M (0X7 << HNSV2_TXD_PORTID_S)
156#define HNSV2_TXD_RI_B 1
157#define HNSV2_TXD_L4CS_B 2
158#define HNSV2_TXD_L3CS_B 3
159#define HNSV2_TXD_FE_B 4
160#define HNSV2_TXD_VLD_B 5
161
162#define HNSV2_TXD_TSE_B 0
163#define HNSV2_TXD_VLAN_EN_B 1
164#define HNSV2_TXD_SNAP_B 2
165#define HNSV2_TXD_IPV6_B 3
166#define HNSV2_TXD_SCTP_B 4
167
168/* hardware spec ring buffer format */
169struct __packed hnae_desc {
170 __le64 addr;
171 union {
172 struct {
173 union {
174 __le16 asid_bufnum_pid;
175 __le16 asid;
176 };
177 __le16 send_size;
178 union {
179 __le32 flag_ipoffset;
180 struct {
181 __u8 bn_pid;
182 __u8 ra_ri_cs_fe_vld;
183 __u8 ip_offset;
184 __u8 tse_vlan_snap_v6_sctp_nth;
185 };
186 };
187 __le16 mss;
188 __u8 l4_len;
189 __u8 reserved1;
190 __le16 paylen;
191 __u8 vmid;
192 __u8 qid;
193 __le32 reserved2[2];
194 } tx;
195
196 struct {
197 __le32 ipoff_bnum_pid_flag;
198 __le16 pkt_len;
199 __le16 size;
200 union {
201 __le32 vlan_pri_asid;
202 struct {
203 __le16 asid;
204 __le16 vlan_cfi_pri;
205 };
206 };
207 __le32 rss_hash;
208 __le32 reserved_1[2];
209 } rx;
210 };
211};
212
213struct hnae_desc_cb {
214 dma_addr_t dma; /* dma address of this desc */
215 void *buf; /* cpu addr for a desc */
216
217 /* priv data for the desc, e.g. skb when use with ip stack*/
218 void *priv;
219 u32 page_offset;
220 u32 length; /* length of the buffer */
221
222 u16 reuse_flag;
223
224 /* desc type, used by the ring user to mark the type of the priv data */
225 u16 type;
226};
227
228#define setflags(flags, bits) ((flags) |= (bits))
229#define unsetflags(flags, bits) ((flags) &= ~(bits))
230
231/* hnae_ring->flags fields */
232#define RINGF_DIR 0x1 /* TX or RX ring, set if TX */
233#define is_tx_ring(ring) ((ring)->flags & RINGF_DIR)
234#define is_rx_ring(ring) (!is_tx_ring(ring))
235#define ring_to_dma_dir(ring) (is_tx_ring(ring) ? \
236 DMA_TO_DEVICE : DMA_FROM_DEVICE)
237
238struct ring_stats {
239 u64 io_err_cnt;
240 u64 sw_err_cnt;
241 u64 seg_pkt_cnt;
242 union {
243 struct {
244 u64 tx_pkts;
245 u64 tx_bytes;
246 u64 tx_err_cnt;
247 u64 restart_queue;
248 u64 tx_busy;
249 };
250 struct {
251 u64 rx_pkts;
252 u64 rx_bytes;
253 u64 rx_err_cnt;
254 u64 reuse_pg_cnt;
255 u64 err_pkt_len;
256 u64 non_vld_descs;
257 u64 err_bd_num;
258 u64 l2_err;
259 u64 l3l4_csum_err;
260 };
261 };
262};
263
264struct hnae_queue;
265
266struct hnae_ring {
267 u8 __iomem *io_base; /* base io address for the ring */
268 struct hnae_desc *desc; /* dma map address space */
269 struct hnae_desc_cb *desc_cb;
270 struct hnae_queue *q;
271 int irq;
272 char ring_name[RCB_RING_NAME_LEN];
273
274 /* statistic */
275 struct ring_stats stats;
276
277 dma_addr_t desc_dma_addr;
278 u32 buf_size; /* size for hnae_desc->addr, preset by AE */
279 u16 desc_num; /* total number of desc */
280 u16 max_desc_num_per_pkt;
281 u16 max_raw_data_sz_per_desc;
282 u16 max_pkt_size;
283 int next_to_use; /* idx of next spare desc */
284
285 /* idx of lastest sent desc, the ring is empty when equal to
286 * next_to_use
287 */
288 int next_to_clean;
289
290 int flags; /* ring attribute */
291 int irq_init_flag;
292
293 /* total rx bytes after last rx rate calucated */
294 u64 coal_last_rx_bytes;
295 unsigned long coal_last_jiffies;
296 u32 coal_param;
297 u32 coal_rx_rate; /* rx rate in MB */
298};
299
300#define ring_ptr_move_fw(ring, p) \
301 ((ring)->p = ((ring)->p + 1) % (ring)->desc_num)
302#define ring_ptr_move_bw(ring, p) \
303 ((ring)->p = ((ring)->p - 1 + (ring)->desc_num) % (ring)->desc_num)
304
305enum hns_desc_type {
306 DESC_TYPE_SKB,
307 DESC_TYPE_PAGE,
308};
309
310#define assert_is_ring_idx(ring, idx) \
311 assert((idx) >= 0 && (idx) < (ring)->desc_num)
312
313/* the distance between [begin, end) in a ring buffer
314 * note: there is a unuse slot between the begin and the end
315 */
316static inline int ring_dist(struct hnae_ring *ring, int begin, int end)
317{
318 assert_is_ring_idx(ring, begin);
319 assert_is_ring_idx(ring, end);
320
321 return (end - begin + ring->desc_num) % ring->desc_num;
322}
323
324static inline int ring_space(struct hnae_ring *ring)
325{
326 return ring->desc_num -
327 ring_dist(ring, begin: ring->next_to_clean, end: ring->next_to_use) - 1;
328}
329
330static inline int is_ring_empty(struct hnae_ring *ring)
331{
332 assert_is_ring_idx(ring, ring->next_to_use);
333 assert_is_ring_idx(ring, ring->next_to_clean);
334
335 return ring->next_to_use == ring->next_to_clean;
336}
337
338#define hnae_buf_size(_ring) ((_ring)->buf_size)
339#define hnae_page_order(_ring) (get_order(hnae_buf_size(_ring)))
340#define hnae_page_size(_ring) (PAGE_SIZE << hnae_page_order(_ring))
341
342struct hnae_handle;
343
344/* allocate and dma map space for hnae desc */
345struct hnae_buf_ops {
346 int (*alloc_buffer)(struct hnae_ring *ring, struct hnae_desc_cb *cb);
347 void (*free_buffer)(struct hnae_ring *ring, struct hnae_desc_cb *cb);
348 int (*map_buffer)(struct hnae_ring *ring, struct hnae_desc_cb *cb);
349 void (*unmap_buffer)(struct hnae_ring *ring, struct hnae_desc_cb *cb);
350};
351
352struct hnae_queue {
353 u8 __iomem *io_base;
354 phys_addr_t phy_base;
355 struct hnae_ae_dev *dev; /* the device who use this queue */
356 struct hnae_ring rx_ring ____cacheline_internodealigned_in_smp;
357 struct hnae_ring tx_ring ____cacheline_internodealigned_in_smp;
358 struct hnae_handle *handle;
359};
360
361/*hnae loop mode*/
362enum hnae_loop {
363 MAC_INTERNALLOOP_MAC = 0,
364 MAC_INTERNALLOOP_SERDES,
365 MAC_INTERNALLOOP_PHY,
366 MAC_LOOP_PHY_NONE,
367 MAC_LOOP_NONE,
368};
369
370/*hnae port type*/
371enum hnae_port_type {
372 HNAE_PORT_SERVICE = 0,
373 HNAE_PORT_DEBUG
374};
375
376/* mac media type */
377enum hnae_media_type {
378 HNAE_MEDIA_TYPE_UNKNOWN = 0,
379 HNAE_MEDIA_TYPE_FIBER,
380 HNAE_MEDIA_TYPE_COPPER,
381 HNAE_MEDIA_TYPE_BACKPLANE,
382};
383
384/* This struct defines the operation on the handle.
385 *
386 * get_handle(): (mandatory)
387 * Get a handle from AE according to its name and options.
388 * the AE driver should manage the space used by handle and its queues while
389 * the HNAE framework will allocate desc and desc_cb for all rings in the
390 * queues.
391 * put_handle():
392 * Release the handle.
393 * start():
394 * Enable the hardware, include all queues
395 * stop():
396 * Disable the hardware
397 * set_opts(): (mandatory)
398 * Set options to the AE
399 * get_opts(): (mandatory)
400 * Get options from the AE
401 * get_status():
402 * Get the carrier state of the back channel of the handle, 1 for ok, 0 for
403 * non-ok
404 * toggle_ring_irq(): (mandatory)
405 * Set the ring irq to be enabled(0) or disable(1)
406 * toggle_queue_status(): (mandatory)
407 * Set the queue to be enabled(1) or disable(0), this will not change the
408 * ring irq state
409 * adjust_link()
410 * adjust link status
411 * set_loopback()
412 * set loopback
413 * get_ring_bdnum_limit()
414 * get ring bd number limit
415 * get_pauseparam()
416 * get tx and rx of pause frame use
417 * set_pauseparam()
418 * set tx and rx of pause frame use
419 * get_coalesce_usecs()
420 * get usecs to delay a TX interrupt after a packet is sent
421 * get_rx_max_coalesced_frames()
422 * get Maximum number of packets to be sent before a TX interrupt.
423 * set_coalesce_usecs()
424 * set usecs to delay a TX interrupt after a packet is sent
425 * set_coalesce_frames()
426 * set Maximum number of packets to be sent before a TX interrupt.
427 * get_ringnum()
428 * get RX/TX ring number
429 * get_max_ringnum()
430 * get RX/TX ring maximum number
431 * get_mac_addr()
432 * get mac address
433 * set_mac_addr()
434 * set mac address
435 * clr_mc_addr()
436 * clear mcast tcam table
437 * set_mc_addr()
438 * set multicast mode
439 * add_uc_addr()
440 * add ucast address
441 * rm_uc_addr()
442 * remove ucast address
443 * set_mtu()
444 * set mtu
445 * update_stats()
446 * update Old network device statistics
447 * get_ethtool_stats()
448 * get ethtool network device statistics
449 * get_strings()
450 * get a set of strings that describe the requested objects
451 * get_sset_count()
452 * get number of strings that @get_strings will write
453 * update_led_status()
454 * update the led status
455 * set_led_id()
456 * set led id
457 * get_regs()
458 * get regs dump
459 * get_regs_len()
460 * get the len of the regs dump
461 */
462struct hnae_ae_ops {
463 struct hnae_handle *(*get_handle)(struct hnae_ae_dev *dev,
464 u32 port_id);
465 void (*put_handle)(struct hnae_handle *handle);
466 void (*init_queue)(struct hnae_queue *q);
467 void (*fini_queue)(struct hnae_queue *q);
468 int (*start)(struct hnae_handle *handle);
469 void (*stop)(struct hnae_handle *handle);
470 void (*reset)(struct hnae_handle *handle);
471 int (*set_opts)(struct hnae_handle *handle, int type, void *opts);
472 int (*get_opts)(struct hnae_handle *handle, int type, void **opts);
473 int (*get_status)(struct hnae_handle *handle);
474 int (*get_info)(struct hnae_handle *handle,
475 u8 *auto_neg, u16 *speed, u8 *duplex);
476 void (*toggle_ring_irq)(struct hnae_ring *ring, u32 val);
477 void (*adjust_link)(struct hnae_handle *handle, int speed, int duplex);
478 bool (*need_adjust_link)(struct hnae_handle *handle,
479 int speed, int duplex);
480 int (*set_loopback)(struct hnae_handle *handle,
481 enum hnae_loop loop_mode, int en);
482 void (*get_ring_bdnum_limit)(struct hnae_queue *queue,
483 u32 *uplimit);
484 void (*get_pauseparam)(struct hnae_handle *handle,
485 u32 *auto_neg, u32 *rx_en, u32 *tx_en);
486 int (*set_pauseparam)(struct hnae_handle *handle,
487 u32 auto_neg, u32 rx_en, u32 tx_en);
488 void (*get_coalesce_usecs)(struct hnae_handle *handle,
489 u32 *tx_usecs, u32 *rx_usecs);
490 void (*get_max_coalesced_frames)(struct hnae_handle *handle,
491 u32 *tx_frames, u32 *rx_frames);
492 int (*set_coalesce_usecs)(struct hnae_handle *handle, u32 timeout);
493 int (*set_coalesce_frames)(struct hnae_handle *handle,
494 u32 tx_frames, u32 rx_frames);
495 void (*get_coalesce_range)(struct hnae_handle *handle,
496 u32 *tx_frames_low, u32 *rx_frames_low,
497 u32 *tx_frames_high, u32 *rx_frames_high,
498 u32 *tx_usecs_low, u32 *rx_usecs_low,
499 u32 *tx_usecs_high, u32 *rx_usecs_high);
500 void (*set_promisc_mode)(struct hnae_handle *handle, u32 en);
501 int (*get_mac_addr)(struct hnae_handle *handle, void **p);
502 int (*set_mac_addr)(struct hnae_handle *handle, const void *p);
503 int (*add_uc_addr)(struct hnae_handle *handle,
504 const unsigned char *addr);
505 int (*rm_uc_addr)(struct hnae_handle *handle,
506 const unsigned char *addr);
507 int (*clr_mc_addr)(struct hnae_handle *handle);
508 int (*set_mc_addr)(struct hnae_handle *handle, void *addr);
509 int (*set_mtu)(struct hnae_handle *handle, int new_mtu);
510 void (*set_tso_stats)(struct hnae_handle *handle, int enable);
511 void (*update_stats)(struct hnae_handle *handle,
512 struct net_device_stats *net_stats);
513 void (*get_stats)(struct hnae_handle *handle, u64 *data);
514 void (*get_strings)(struct hnae_handle *handle,
515 u32 stringset, u8 *data);
516 int (*get_sset_count)(struct hnae_handle *handle, int stringset);
517 void (*update_led_status)(struct hnae_handle *handle);
518 int (*set_led_id)(struct hnae_handle *handle,
519 enum hnae_led_state status);
520 void (*get_regs)(struct hnae_handle *handle, void *data);
521 int (*get_regs_len)(struct hnae_handle *handle);
522 u32 (*get_rss_key_size)(struct hnae_handle *handle);
523 u32 (*get_rss_indir_size)(struct hnae_handle *handle);
524 int (*get_rss)(struct hnae_handle *handle, u32 *indir, u8 *key,
525 u8 *hfunc);
526 int (*set_rss)(struct hnae_handle *handle, const u32 *indir,
527 const u8 *key, const u8 hfunc);
528};
529
530struct hnae_ae_dev {
531 struct device cls_dev; /* the class dev */
532 struct device *dev; /* the presented dev */
533 struct hnae_ae_ops *ops;
534 struct list_head node;
535 struct module *owner; /* the module who provides this dev */
536 int id;
537 char name[AE_NAME_SIZE];
538 struct list_head handle_list;
539 spinlock_t lock; /* lock to protect the handle_list */
540};
541
542struct hnae_handle {
543 struct device *owner_dev; /* the device which make use of this handle */
544 struct hnae_ae_dev *dev; /* the device who provides this handle */
545 struct phy_device *phy_dev;
546 phy_interface_t phy_if;
547 u32 if_support;
548 int q_num;
549 int vf_id;
550 unsigned long coal_last_jiffies;
551 u32 coal_param; /* self adapt coalesce param */
552 /* the ring index of last ring that set coal param */
553 u32 coal_ring_idx;
554 u32 eport_id;
555 u32 dport_id; /* v2 tx bd should fill the dport_id */
556 bool coal_adapt_en;
557 enum hnae_port_type port_type;
558 enum hnae_media_type media_type;
559 struct list_head node; /* list to hnae_ae_dev->handle_list */
560 struct hnae_buf_ops *bops; /* operation for the buffer */
561 struct hnae_queue *qs[]; /* flexible array of all queues */
562};
563
564#define ring_to_dev(ring) ((ring)->q->dev->dev)
565
566struct hnae_handle *hnae_get_handle(struct device *owner_dev,
567 const struct fwnode_handle *fwnode,
568 u32 port_id,
569 struct hnae_buf_ops *bops);
570
571void hnae_put_handle(struct hnae_handle *handle);
572int hnae_ae_register(struct hnae_ae_dev *dev, struct module *owner);
573void hnae_ae_unregister(struct hnae_ae_dev *dev);
574
575int hnae_register_notifier(struct notifier_block *nb);
576void hnae_unregister_notifier(struct notifier_block *nb);
577int hnae_reinit_handle(struct hnae_handle *handle);
578
579#define hnae_queue_xmit(q, buf_num) writel_relaxed(buf_num, \
580 (q)->tx_ring.io_base + RCB_REG_TAIL)
581
582#ifndef assert
583#define assert(cond)
584#endif
585
586static inline int hnae_reserve_buffer_map(struct hnae_ring *ring,
587 struct hnae_desc_cb *cb)
588{
589 struct hnae_buf_ops *bops = ring->q->handle->bops;
590 int ret;
591
592 ret = bops->alloc_buffer(ring, cb);
593 if (ret)
594 goto out;
595
596 ret = bops->map_buffer(ring, cb);
597 if (ret)
598 goto out_with_buf;
599
600 return 0;
601
602out_with_buf:
603 bops->free_buffer(ring, cb);
604out:
605 return ret;
606}
607
608static inline int hnae_alloc_buffer_attach(struct hnae_ring *ring, int i)
609{
610 int ret = hnae_reserve_buffer_map(ring, cb: &ring->desc_cb[i]);
611
612 if (ret)
613 return ret;
614
615 ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma);
616
617 return 0;
618}
619
620static inline void hnae_buffer_detach(struct hnae_ring *ring, int i)
621{
622 ring->q->handle->bops->unmap_buffer(ring, &ring->desc_cb[i]);
623 ring->desc[i].addr = 0;
624}
625
626static inline void hnae_free_buffer_detach(struct hnae_ring *ring, int i)
627{
628 struct hnae_buf_ops *bops = ring->q->handle->bops;
629 struct hnae_desc_cb *cb = &ring->desc_cb[i];
630
631 if (!ring->desc_cb[i].dma)
632 return;
633
634 hnae_buffer_detach(ring, i);
635 bops->free_buffer(ring, cb);
636}
637
638/* detach a in-used buffer and replace with a reserved one */
639static inline void hnae_replace_buffer(struct hnae_ring *ring, int i,
640 struct hnae_desc_cb *res_cb)
641{
642 struct hnae_buf_ops *bops = ring->q->handle->bops;
643
644 bops->unmap_buffer(ring, &ring->desc_cb[i]);
645 ring->desc_cb[i] = *res_cb;
646 ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma);
647 ring->desc[i].rx.ipoff_bnum_pid_flag = 0;
648}
649
650static inline void hnae_reuse_buffer(struct hnae_ring *ring, int i)
651{
652 ring->desc_cb[i].reuse_flag = 0;
653 ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma
654 + ring->desc_cb[i].page_offset);
655 ring->desc[i].rx.ipoff_bnum_pid_flag = 0;
656}
657
658/* when reinit buffer size, we should reinit buffer description */
659static inline void hnae_reinit_all_ring_desc(struct hnae_handle *h)
660{
661 int i, j;
662 struct hnae_ring *ring;
663
664 for (i = 0; i < h->q_num; i++) {
665 ring = &h->qs[i]->rx_ring;
666 for (j = 0; j < ring->desc_num; j++)
667 ring->desc[j].addr = cpu_to_le64(ring->desc_cb[j].dma);
668 }
669
670 wmb(); /* commit all data before submit */
671}
672
673/* when reinit buffer size, we should reinit page offset */
674static inline void hnae_reinit_all_ring_page_off(struct hnae_handle *h)
675{
676 int i, j;
677 struct hnae_ring *ring;
678
679 for (i = 0; i < h->q_num; i++) {
680 ring = &h->qs[i]->rx_ring;
681 for (j = 0; j < ring->desc_num; j++) {
682 ring->desc_cb[j].page_offset = 0;
683 if (ring->desc[j].addr !=
684 cpu_to_le64(ring->desc_cb[j].dma))
685 ring->desc[j].addr =
686 cpu_to_le64(ring->desc_cb[j].dma);
687 }
688 }
689
690 wmb(); /* commit all data before submit */
691}
692
693#define hnae_set_field(origin, mask, shift, val) \
694 do { \
695 (origin) &= (~(mask)); \
696 (origin) |= ((val) << (shift)) & (mask); \
697 } while (0)
698
699#define hnae_set_bit(origin, shift, val) \
700 hnae_set_field((origin), (0x1 << (shift)), (shift), (val))
701
702#define hnae_get_field(origin, mask, shift) (((origin) & (mask)) >> (shift))
703
704#define hnae_get_bit(origin, shift) \
705 hnae_get_field((origin), (0x1 << (shift)), (shift))
706
707#endif
708

source code of linux/drivers/net/ethernet/hisilicon/hns/hnae.h