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) \
45 do { \
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 
92 enum 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 */
169 struct __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 
213 struct 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 
238 struct 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 
264 struct hnae_queue;
265 
266 struct 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 
305 enum 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  */
316 static 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 
324 static inline int ring_space(struct hnae_ring *ring)
325 {
326 	return ring->desc_num -
327 		ring_dist(ring, ring->next_to_clean, ring->next_to_use) - 1;
328 }
329 
330 static 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 
342 struct hnae_handle;
343 
344 /* allocate and dma map space for hnae desc */
345 struct 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 
352 struct 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*/
362 enum 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*/
371 enum hnae_port_type {
372 	HNAE_PORT_SERVICE = 0,
373 	HNAE_PORT_DEBUG
374 };
375 
376 /* mac media type */
377 enum 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  */
462 struct 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, 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 
530 struct 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 
542 struct 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;  /* array base of all queues */
562 };
563 
564 #define ring_to_dev(ring) ((ring)->q->dev->dev)
565 
566 struct 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 
571 void hnae_put_handle(struct hnae_handle *handle);
572 int hnae_ae_register(struct hnae_ae_dev *dev, struct module *owner);
573 void hnae_ae_unregister(struct hnae_ae_dev *dev);
574 
575 int hnae_register_notifier(struct notifier_block *nb);
576 void hnae_unregister_notifier(struct notifier_block *nb);
577 int 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 
586 static 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 
602 out_with_buf:
603 	bops->free_buffer(ring, cb);
604 out:
605 	return ret;
606 }
607 
608 static inline int hnae_alloc_buffer_attach(struct hnae_ring *ring, int i)
609 {
610 	int ret = hnae_reserve_buffer_map(ring, &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 
620 static 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 
626 static 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  */
639 static 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 
650 static 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 */
659 static 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 */
674 static 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