summaryrefslogtreecommitdiff
path: root/drivers/net/vmxnet3/vmxnet3_int.h
blob: 34f392f46fb1e026e3d766d8fc9dd61dcd678328 (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
/*
 * Linux driver for VMware's vmxnet3 ethernet NIC.
 *
 * Copyright (C) 2008-2009, VMware, Inc. All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; version 2 of the License and no later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
 * NON INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * The full GNU General Public License is included in this distribution in
 * the file called "COPYING".
 *
 * Maintained by: Shreyas Bhatewara <pv-drivers@vmware.com>
 *
 */

#ifndef _VMXNET3_INT_H
#define _VMXNET3_INT_H

#include <linux/ethtool.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/pci.h>
#include <linux/compiler.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/ioport.h>
#include <linux/highmem.h>
#include <linux/init.h>
#include <linux/timer.h>
#include <linux/skbuff.h>
#include <linux/interrupt.h>
#include <linux/workqueue.h>
#include <linux/uaccess.h>
#include <asm/dma.h>
#include <asm/page.h>

#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/in.h>
#include <linux/etherdevice.h>
#include <asm/checksum.h>
#include <linux/if_vlan.h>
#include <linux/if_arp.h>
#include <linux/inetdevice.h>

#include "vmxnet3_defs.h"

#ifdef DEBUG
# define VMXNET3_DRIVER_VERSION_REPORT VMXNET3_DRIVER_VERSION_STRING"-NAPI(debug)"
#else
# define VMXNET3_DRIVER_VERSION_REPORT VMXNET3_DRIVER_VERSION_STRING"-NAPI"
#endif


/*
 * Version numbers
 */
#define VMXNET3_DRIVER_VERSION_STRING   "1.0.5.0-k"

/* a 32-bit int, each byte encode a verion number in VMXNET3_DRIVER_VERSION */
#define VMXNET3_DRIVER_VERSION_NUM      0x01000500


/*
 * Capabilities
 */

enum {
	VMNET_CAP_SG	        = 0x0001, /* Can do scatter-gather transmits. */
	VMNET_CAP_IP4_CSUM      = 0x0002, /* Can checksum only TCP/UDP over
					   * IPv4 */
	VMNET_CAP_HW_CSUM       = 0x0004, /* Can checksum all packets. */
	VMNET_CAP_HIGH_DMA      = 0x0008, /* Can DMA to high memory. */
	VMNET_CAP_TOE	        = 0x0010, /* Supports TCP/IP offload. */
	VMNET_CAP_TSO	        = 0x0020, /* Supports TCP Segmentation
					   * offload */
	VMNET_CAP_SW_TSO        = 0x0040, /* Supports SW TCP Segmentation */
	VMNET_CAP_VMXNET_APROM  = 0x0080, /* Vmxnet APROM support */
	VMNET_CAP_HW_TX_VLAN    = 0x0100, /* Can we do VLAN tagging in HW */
	VMNET_CAP_HW_RX_VLAN    = 0x0200, /* Can we do VLAN untagging in HW */
	VMNET_CAP_SW_VLAN       = 0x0400, /* VLAN tagging/untagging in SW */
	VMNET_CAP_WAKE_PCKT_RCV = 0x0800, /* Can wake on network packet recv? */
	VMNET_CAP_ENABLE_INT_INLINE = 0x1000,  /* Enable Interrupt Inline */
	VMNET_CAP_ENABLE_HEADER_COPY = 0x2000,  /* copy header for vmkernel */
	VMNET_CAP_TX_CHAIN      = 0x4000, /* Guest can use multiple tx entries
					  * for a pkt */
	VMNET_CAP_RX_CHAIN      = 0x8000, /* pkt can span multiple rx entries */
	VMNET_CAP_LPD           = 0x10000, /* large pkt delivery */
	VMNET_CAP_BPF           = 0x20000, /* BPF Support in VMXNET Virtual HW*/
	VMNET_CAP_SG_SPAN_PAGES = 0x40000, /* Scatter-gather can span multiple*/
					   /* pages transmits */
	VMNET_CAP_IP6_CSUM      = 0x80000, /* Can do IPv6 csum offload. */
	VMNET_CAP_TSO6         = 0x100000, /* TSO seg. offload for IPv6 pkts. */
	VMNET_CAP_TSO256k      = 0x200000, /* Can do TSO seg offload for */
					   /* pkts up to 256kB. */
	VMNET_CAP_UPT          = 0x400000  /* Support UPT */
};

/*
 * PCI vendor and device IDs.
 */
#define PCI_VENDOR_ID_VMWARE            0x15AD
#define PCI_DEVICE_ID_VMWARE_VMXNET3    0x07B0
#define MAX_ETHERNET_CARDS		10
#define MAX_PCI_PASSTHRU_DEVICE		6

struct vmxnet3_cmd_ring {
	union Vmxnet3_GenericDesc *base;
	u32		size;
	u32		next2fill;
	u32		next2comp;
	u8		gen;
	dma_addr_t	basePA;
};

static inline void
vmxnet3_cmd_ring_adv_next2fill(struct vmxnet3_cmd_ring *ring)
{
	ring->next2fill++;
	if (unlikely(ring->next2fill == ring->size)) {
		ring->next2fill = 0;
		VMXNET3_FLIP_RING_GEN(ring->gen);
	}
}

static inline void
vmxnet3_cmd_ring_adv_next2comp(struct vmxnet3_cmd_ring *ring)
{
	VMXNET3_INC_RING_IDX_ONLY(ring->next2comp, ring->size);
}

static inline int
vmxnet3_cmd_ring_desc_avail(struct vmxnet3_cmd_ring *ring)
{
	return (ring->next2comp > ring->next2fill ? 0 : ring->size) +
		ring->next2comp - ring->next2fill - 1;
}

struct vmxnet3_comp_ring {
	union Vmxnet3_GenericDesc *base;
	u32               size;
	u32               next2proc;
	u8                gen;
	u8                intr_idx;
	dma_addr_t           basePA;
};

static inline void
vmxnet3_comp_ring_adv_next2proc(struct vmxnet3_comp_ring *ring)
{
	ring->next2proc++;
	if (unlikely(ring->next2proc == ring->size)) {
		ring->next2proc = 0;
		VMXNET3_FLIP_RING_GEN(ring->gen);
	}
}

struct vmxnet3_tx_data_ring {
	struct Vmxnet3_TxDataDesc *base;
	u32              size;
	dma_addr_t          basePA;
};

enum vmxnet3_buf_map_type {
	VMXNET3_MAP_INVALID = 0,
	VMXNET3_MAP_NONE,
	VMXNET3_MAP_SINGLE,
	VMXNET3_MAP_PAGE,
};

struct vmxnet3_tx_buf_info {
	u32      map_type;
	u16      len;
	u16      sop_idx;
	dma_addr_t  dma_addr;
	struct sk_buff *skb;
};

struct vmxnet3_tq_driver_stats {
	u64 drop_total;     /* # of pkts dropped by the driver, the
				* counters below track droppings due to
				* different reasons
				*/
	u64 drop_too_many_frags;
	u64 drop_oversized_hdr;
	u64 drop_hdr_inspect_err;
	u64 drop_tso;

	u64 tx_ring_full;
	u64 linearized;         /* # of pkts linearized */
	u64 copy_skb_header;    /* # of times we have to copy skb header */
	u64 oversized_hdr;
};

struct vmxnet3_tx_ctx {
	bool   ipv4;
	u16 mss;
	u32 eth_ip_hdr_size; /* only valid for pkts requesting tso or csum
				 * offloading
				 */
	u32 l4_hdr_size;     /* only valid if mss != 0 */
	u32 copy_size;       /* # of bytes copied into the data ring */
	union Vmxnet3_GenericDesc *sop_txd;
	union Vmxnet3_GenericDesc *eop_txd;
};

struct vmxnet3_tx_queue {
	spinlock_t                      tx_lock;
	struct vmxnet3_cmd_ring         tx_ring;
	struct vmxnet3_tx_buf_info     *buf_info;
	struct vmxnet3_tx_data_ring     data_ring;
	struct vmxnet3_comp_ring        comp_ring;
	struct Vmxnet3_TxQueueCtrl            *shared;
	struct vmxnet3_tq_driver_stats  stats;
	bool                            stopped;
	int                             num_stop;  /* # of times the queue is
						    * stopped */
} __attribute__((__aligned__(SMP_CACHE_BYTES)));

enum vmxnet3_rx_buf_type {
	VMXNET3_RX_BUF_NONE = 0,
	VMXNET3_RX_BUF_SKB = 1,
	VMXNET3_RX_BUF_PAGE = 2
};

struct vmxnet3_rx_buf_info {
	enum vmxnet3_rx_buf_type buf_type;
	u16     len;
	union {
		struct sk_buff *skb;
		struct page    *page;
	};
	dma_addr_t dma_addr;
};

struct vmxnet3_rx_ctx {
	struct sk_buff *skb;
	u32 sop_idx;
};

struct vmxnet3_rq_driver_stats {
	u64 drop_total;
	u64 drop_err;
	u64 drop_fcs;
	u64 rx_buf_alloc_failure;
};

struct vmxnet3_rx_queue {
	struct vmxnet3_cmd_ring   rx_ring[2];
	struct vmxnet3_comp_ring  comp_ring;
	struct vmxnet3_rx_ctx     rx_ctx;
	u32 qid;            /* rqID in RCD for buffer from 1st ring */
	u32 qid2;           /* rqID in RCD for buffer from 2nd ring */
	u32 uncommitted[2]; /* # of buffers allocated since last RXPROD
				* update */
	struct vmxnet3_rx_buf_info     *buf_info[2];
	struct Vmxnet3_RxQueueCtrl            *shared;
	struct vmxnet3_rq_driver_stats  stats;
} __attribute__((__aligned__(SMP_CACHE_BYTES)));

#define VMXNET3_LINUX_MAX_MSIX_VECT     1

struct vmxnet3_intr {
	enum vmxnet3_intr_mask_mode  mask_mode;
	enum vmxnet3_intr_type       type;	/* MSI-X, MSI, or INTx? */
	u8  num_intrs;			/* # of intr vectors */
	u8  event_intr_idx;		/* idx of the intr vector for event */
	u8  mod_levels[VMXNET3_LINUX_MAX_MSIX_VECT]; /* moderation level */
#ifdef CONFIG_PCI_MSI
	struct msix_entry msix_entries[VMXNET3_LINUX_MAX_MSIX_VECT];
#endif
};

#define VMXNET3_STATE_BIT_RESETTING   0
#define VMXNET3_STATE_BIT_QUIESCED    1
struct vmxnet3_adapter {
	struct vmxnet3_tx_queue         tx_queue;
	struct vmxnet3_rx_queue         rx_queue;
	struct napi_struct              napi;
	struct vlan_group              *vlan_grp;

	struct vmxnet3_intr             intr;

	struct Vmxnet3_DriverShared    *shared;
	struct Vmxnet3_PMConf          *pm_conf;
	struct Vmxnet3_TxQueueDesc     *tqd_start;     /* first tx queue desc */
	struct Vmxnet3_RxQueueDesc     *rqd_start;     /* first rx queue desc */
	struct net_device              *netdev;
	struct pci_dev                 *pdev;

	u8				*hw_addr0; /* for BAR 0 */
	u8				*hw_addr1; /* for BAR 1 */

	/* feature control */
	bool				rxcsum;
	bool				lro;
	bool				jumbo_frame;

	/* rx buffer related */
	unsigned			skb_buf_size;
	int		rx_buf_per_pkt;  /* only apply to the 1st ring */
	dma_addr_t			shared_pa;
	dma_addr_t queue_desc_pa;

	/* Wake-on-LAN */
	u32     wol;

	/* Link speed */
	u32     link_speed; /* in mbps */

	u64     tx_timeout_count;
	struct work_struct work;

	unsigned long  state;    /* VMXNET3_STATE_BIT_xxx */

	int dev_number;
};

#define VMXNET3_WRITE_BAR0_REG(adapter, reg, val)  \
	writel(cpu_to_le32(val), (adapter)->hw_addr0 + (reg))
#define VMXNET3_READ_BAR0_REG(adapter, reg)        \
	le32_to_cpu(readl((adapter)->hw_addr0 + (reg)))

#define VMXNET3_WRITE_BAR1_REG(adapter, reg, val)  \
	writel(cpu_to_le32(val), (adapter)->hw_addr1 + (reg))
#define VMXNET3_READ_BAR1_REG(adapter, reg)        \
	le32_to_cpu(readl((adapter)->hw_addr1 + (reg)))

#define VMXNET3_WAKE_QUEUE_THRESHOLD(tq)  (5)
#define VMXNET3_RX_ALLOC_THRESHOLD(rq, ring_idx, adapter) \
	((rq)->rx_ring[ring_idx].size >> 3)

#define VMXNET3_GET_ADDR_LO(dma)   ((u32)(dma))
#define VMXNET3_GET_ADDR_HI(dma)   ((u32)(((u64)(dma)) >> 32))

/* must be a multiple of VMXNET3_RING_SIZE_ALIGN */
#define VMXNET3_DEF_TX_RING_SIZE    512
#define VMXNET3_DEF_RX_RING_SIZE    256

#define VMXNET3_MAX_ETH_HDR_SIZE    22
#define VMXNET3_MAX_SKB_BUF_SIZE    (3*1024)

void set_flag_le16(__le16 *data, u16 flag);
void set_flag_le64(__le64 *data, u64 flag);
void reset_flag_le64(__le64 *data, u64 flag);

int
vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter);

int
vmxnet3_activate_dev(struct vmxnet3_adapter *adapter);

void
vmxnet3_force_close(struct vmxnet3_adapter *adapter);

void
vmxnet3_reset_dev(struct vmxnet3_adapter *adapter);

void
vmxnet3_tq_destroy(struct vmxnet3_tx_queue *tq,
		   struct vmxnet3_adapter *adapter);

void
vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq,
		   struct vmxnet3_adapter *adapter);

int
vmxnet3_create_queues(struct vmxnet3_adapter *adapter,
		      u32 tx_ring_size, u32 rx_ring_size, u32 rx_ring2_size);

extern void vmxnet3_set_ethtool_ops(struct net_device *netdev);
extern struct net_device_stats *vmxnet3_get_stats(struct net_device *netdev);

extern char vmxnet3_driver_name[];
#endif