summaryrefslogtreecommitdiffstats
path: root/drivers/net/ethernet/cavium/liquidio/octeon_network.h
blob: e5d1debd05add28a0a91e8880db929cb2e7a19db (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
/**********************************************************************
 * Author: Cavium, Inc.
 *
 * Contact: support@cavium.com
 *          Please include "LiquidIO" in the subject.
 *
 * Copyright (c) 2003-2015 Cavium, Inc.
 *
 * This file is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, Version 2, as
 * published by the Free Software Foundation.
 *
 * This file is distributed in the hope that it will be useful, but
 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
 * NONINFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * This file may also be available under a different license from Cavium.
 * Contact Cavium, Inc. for more information
 **********************************************************************/

/*!  \file  octeon_network.h
 *   \brief Host NIC Driver: Structure and Macro definitions used by NIC Module.
 */

#ifndef __OCTEON_NETWORK_H__
#define __OCTEON_NETWORK_H__
#include <linux/ptp_clock_kernel.h>

#define LIO_MAX_MTU_SIZE (OCTNET_MAX_FRM_SIZE - OCTNET_FRM_HEADER_SIZE)
#define LIO_MIN_MTU_SIZE 68

struct oct_nic_stats_resp {
	u64     rh;
	struct oct_link_stats stats;
	u64     status;
};

struct oct_nic_stats_ctrl {
	struct completion complete;
	struct net_device *netdev;
};

/** LiquidIO per-interface network private data */
struct lio {
	/** State of the interface. Rx/Tx happens only in the RUNNING state.  */
	atomic_t ifstate;

	/** Octeon Interface index number. This device will be represented as
	 *  oct<ifidx> in the system.
	 */
	int ifidx;

	/** Octeon Input queue to use to transmit for this network interface. */
	int txq;

	/** Octeon Output queue from which pkts arrive
	 * for this network interface.
	 */
	int rxq;

	/** Guards each glist */
	spinlock_t *glist_lock;

	/** Array of gather component linked lists */
	struct list_head *glist;

	/** Pointer to the NIC properties for the Octeon device this network
	 *  interface is associated with.
	 */
	struct octdev_props *octprops;

	/** Pointer to the octeon device structure. */
	struct octeon_device *oct_dev;

	struct net_device *netdev;

	/** Link information sent by the core application for this interface. */
	struct oct_link_info linfo;

	/** counter of link changes */
	u64 link_changes;

	/** Size of Tx queue for this octeon device. */
	u32 tx_qsize;

	/** Size of Rx queue for this octeon device. */
	u32 rx_qsize;

	/** Size of MTU this octeon device. */
	u32 mtu;

	/** msg level flag per interface. */
	u32 msg_enable;

	/** Copy of Interface capabilities: TSO, TSO6, LRO, Chescksums . */
	u64 dev_capability;

	/* Copy of transmit encapsulation capabilities:
	 * TSO, TSO6, Checksums for this device for Kernel
	 * 3.10.0 onwards
	 */
	u64 enc_dev_capability;

	/** Copy of beacaon reg in phy */
	u32 phy_beacon_val;

	/** Copy of ctrl reg in phy */
	u32 led_ctrl_val;

	/* PTP clock information */
	struct ptp_clock_info ptp_info;
	struct ptp_clock *ptp_clock;
	s64 ptp_adjust;

	/* for atomic access to Octeon PTP reg and data struct */
	spinlock_t ptp_lock;

	/* Interface info */
	u32	intf_open;

	/* work queue for  txq status */
	struct cavium_wq	txq_status_wq;

	/* work queue for  link status */
	struct cavium_wq	link_status_wq;

};

#define LIO_SIZE         (sizeof(struct lio))
#define GET_LIO(netdev)  ((struct lio *)netdev_priv(netdev))

#define CIU3_WDOG(c)                 (0x1010000020000ULL + (c << 3))
#define CIU3_WDOG_MASK               12ULL
#define LIO_MONITOR_WDOG_EXPIRE      1
#define LIO_MONITOR_CORE_STUCK_MSGD  2
#define LIO_MAX_CORES                12

/**
 * \brief Enable or disable feature
 * @param netdev    pointer to network device
 * @param cmd       Command that just requires acknowledgment
 * @param param1    Parameter to command
 */
int liquidio_set_feature(struct net_device *netdev, int cmd, u16 param1);

/**
 * \brief Link control command completion callback
 * @param nctrl_ptr pointer to control packet structure
 *
 * This routine is called by the callback function when a ctrl pkt sent to
 * core app completes. The nctrl_ptr contains a copy of the command type
 * and data sent to the core app. This routine is only called if the ctrl
 * pkt was sent successfully to the core app.
 */
void liquidio_link_ctrl_cmd_completion(void *nctrl_ptr);

/**
 * \brief Register ethtool operations
 * @param netdev    pointer to network device
 */
void liquidio_set_ethtool_ops(struct net_device *netdev);

#define SKB_ADJ_MASK  0x3F
#define SKB_ADJ       (SKB_ADJ_MASK + 1)

#define MIN_SKB_SIZE       256 /* 8 bytes and more - 8 bytes for PTP */
#define LIO_RXBUFFER_SZ    2048

static inline void
*recv_buffer_alloc(struct octeon_device *oct,
		   struct octeon_skb_page_info *pg_info)
{
	struct page *page;
	struct sk_buff *skb;
	struct octeon_skb_page_info *skb_pg_info;

	page = alloc_page(GFP_ATOMIC | __GFP_COLD);
	if (unlikely(!page))
		return NULL;

	skb = dev_alloc_skb(MIN_SKB_SIZE + SKB_ADJ);
	if (unlikely(!skb)) {
		__free_page(page);
		pg_info->page = NULL;
		return NULL;
	}

	if ((unsigned long)skb->data & SKB_ADJ_MASK) {
		u32 r = SKB_ADJ - ((unsigned long)skb->data & SKB_ADJ_MASK);

		skb_reserve(skb, r);
	}

	skb_pg_info = ((struct octeon_skb_page_info *)(skb->cb));
	/* Get DMA info */
	pg_info->dma = dma_map_page(&oct->pci_dev->dev, page, 0,
				    PAGE_SIZE, DMA_FROM_DEVICE);

	/* Mapping failed!! */
	if (dma_mapping_error(&oct->pci_dev->dev, pg_info->dma)) {
		__free_page(page);
		dev_kfree_skb_any((struct sk_buff *)skb);
		pg_info->page = NULL;
		return NULL;
	}

	pg_info->page = page;
	pg_info->page_offset = 0;
	skb_pg_info->page = page;
	skb_pg_info->page_offset = 0;
	skb_pg_info->dma = pg_info->dma;

	return (void *)skb;
}

static inline void
*recv_buffer_fast_alloc(u32 size)
{
	struct sk_buff *skb;
	struct octeon_skb_page_info *skb_pg_info;

	skb = dev_alloc_skb(size + SKB_ADJ);
	if (unlikely(!skb))
		return NULL;

	if ((unsigned long)skb->data & SKB_ADJ_MASK) {
		u32 r = SKB_ADJ - ((unsigned long)skb->data & SKB_ADJ_MASK);

		skb_reserve(skb, r);
	}

	skb_pg_info = ((struct octeon_skb_page_info *)(skb->cb));
	skb_pg_info->page = NULL;
	skb_pg_info->page_offset = 0;
	skb_pg_info->dma = 0;

	return skb;
}

static inline int
recv_buffer_recycle(struct octeon_device *oct, void *buf)
{
	struct octeon_skb_page_info *pg_info = buf;

	if (!pg_info->page) {
		dev_err(&oct->pci_dev->dev, "%s: pg_info->page NULL\n",
			__func__);
		return -ENOMEM;
	}

	if (unlikely(page_count(pg_info->page) != 1) ||
	    unlikely(page_to_nid(pg_info->page)	!= numa_node_id())) {
		dma_unmap_page(&oct->pci_dev->dev,
			       pg_info->dma, (PAGE_SIZE << 0),
			       DMA_FROM_DEVICE);
		pg_info->dma = 0;
		pg_info->page = NULL;
		pg_info->page_offset = 0;
		return -ENOMEM;
	}

	/* Flip to other half of the buffer */
	if (pg_info->page_offset == 0)
		pg_info->page_offset = LIO_RXBUFFER_SZ;
	else
		pg_info->page_offset = 0;
	page_ref_inc(pg_info->page);

	return 0;
}

static inline void
*recv_buffer_reuse(struct octeon_device *oct, void *buf)
{
	struct octeon_skb_page_info *pg_info = buf, *skb_pg_info;
	struct sk_buff *skb;

	skb = dev_alloc_skb(MIN_SKB_SIZE + SKB_ADJ);
	if (unlikely(!skb)) {
		dma_unmap_page(&oct->pci_dev->dev,
			       pg_info->dma, (PAGE_SIZE << 0),
			       DMA_FROM_DEVICE);
		return NULL;
	}

	if ((unsigned long)skb->data & SKB_ADJ_MASK) {
		u32 r = SKB_ADJ - ((unsigned long)skb->data & SKB_ADJ_MASK);

		skb_reserve(skb, r);
	}

	skb_pg_info = ((struct octeon_skb_page_info *)(skb->cb));
	skb_pg_info->page = pg_info->page;
	skb_pg_info->page_offset = pg_info->page_offset;
	skb_pg_info->dma = pg_info->dma;

	return skb;
}

static inline void
recv_buffer_destroy(void *buffer, struct octeon_skb_page_info *pg_info)
{
	struct sk_buff *skb = (struct sk_buff *)buffer;

	put_page(pg_info->page);
	pg_info->dma = 0;
	pg_info->page = NULL;
	pg_info->page_offset = 0;

	if (skb)
		dev_kfree_skb_any(skb);
}

static inline void recv_buffer_free(void *buffer)
{
	struct sk_buff *skb = (struct sk_buff *)buffer;
	struct octeon_skb_page_info *pg_info;

	pg_info = ((struct octeon_skb_page_info *)(skb->cb));

	if (pg_info->page) {
		put_page(pg_info->page);
		pg_info->dma = 0;
		pg_info->page = NULL;
		pg_info->page_offset = 0;
	}

	dev_kfree_skb_any((struct sk_buff *)buffer);
}

static inline void
recv_buffer_fast_free(void *buffer)
{
	dev_kfree_skb_any((struct sk_buff *)buffer);
}

static inline void tx_buffer_free(void *buffer)
{
	dev_kfree_skb_any((struct sk_buff *)buffer);
}

#define lio_dma_alloc(oct, size, dma_addr) \
	dma_alloc_coherent(&oct->pci_dev->dev, size, dma_addr, GFP_KERNEL)
#define lio_dma_free(oct, size, virt_addr, dma_addr) \
	dma_free_coherent(&oct->pci_dev->dev, size, virt_addr, dma_addr)

static inline
void *get_rbd(struct sk_buff *skb)
{
	struct octeon_skb_page_info *pg_info;
	unsigned char *va;

	pg_info = ((struct octeon_skb_page_info *)(skb->cb));
	va = page_address(pg_info->page) + pg_info->page_offset;

	return va;
}

static inline u64
lio_map_ring_info(struct octeon_droq *droq, u32 i)
{
	dma_addr_t dma_addr;
	struct octeon_device *oct = droq->oct_dev;

	dma_addr = dma_map_single(&oct->pci_dev->dev, &droq->info_list[i],
				  OCT_DROQ_INFO_SIZE, DMA_FROM_DEVICE);

	WARN_ON(dma_mapping_error(&oct->pci_dev->dev, dma_addr));

	return (u64)dma_addr;
}

static inline void
lio_unmap_ring_info(struct pci_dev *pci_dev,
		    u64 info_ptr, u32 size)
{
	dma_unmap_single(&pci_dev->dev, info_ptr, size, DMA_FROM_DEVICE);
}

static inline u64
lio_map_ring(void *buf)
{
	dma_addr_t dma_addr;

	struct sk_buff *skb = (struct sk_buff *)buf;
	struct octeon_skb_page_info *pg_info;

	pg_info = ((struct octeon_skb_page_info *)(skb->cb));
	if (!pg_info->page) {
		pr_err("%s: pg_info->page NULL\n", __func__);
		WARN_ON(1);
	}

	/* Get DMA info */
	dma_addr = pg_info->dma;
	if (!pg_info->dma) {
		pr_err("%s: ERROR it should be already available\n",
		       __func__);
		WARN_ON(1);
	}
	dma_addr += pg_info->page_offset;

	return (u64)dma_addr;
}

static inline void
lio_unmap_ring(struct pci_dev *pci_dev,
	       u64 buf_ptr)

{
	dma_unmap_page(&pci_dev->dev,
		       buf_ptr, (PAGE_SIZE << 0),
		       DMA_FROM_DEVICE);
}

static inline void *octeon_fast_packet_alloc(u32 size)
{
	return recv_buffer_fast_alloc(size);
}

static inline void octeon_fast_packet_next(struct octeon_droq *droq,
					   struct sk_buff *nicbuf,
					   int copy_len,
					   int idx)
{
	memcpy(skb_put(nicbuf, copy_len),
	       get_rbd(droq->recv_buf_list[idx].buffer), copy_len);
}

#endif