summaryrefslogtreecommitdiff
path: root/arch/sparc/include/asm/vio.h
blob: 8a1a83bbb6d5514d5cb154f2c970382463c44024 (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
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _SPARC64_VIO_H
#define _SPARC64_VIO_H

#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/mod_devicetable.h>
#include <linux/timer.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/list.h>
#include <linux/log2.h>

#include <asm/ldc.h>
#include <asm/mdesc.h>

struct vio_msg_tag {
	u8			type;
#define VIO_TYPE_CTRL		0x01
#define VIO_TYPE_DATA		0x02
#define VIO_TYPE_ERR		0x04

	u8			stype;
#define VIO_SUBTYPE_INFO	0x01
#define VIO_SUBTYPE_ACK		0x02
#define VIO_SUBTYPE_NACK	0x04

	u16			stype_env;
#define VIO_VER_INFO		0x0001
#define VIO_ATTR_INFO		0x0002
#define VIO_DRING_REG		0x0003
#define VIO_DRING_UNREG		0x0004
#define VIO_RDX			0x0005
#define VIO_PKT_DATA		0x0040
#define VIO_DESC_DATA		0x0041
#define VIO_DRING_DATA		0x0042
#define VNET_MCAST_INFO		0x0101

	u32		sid;
};

struct vio_rdx {
	struct vio_msg_tag	tag;
	u64			resv[6];
};

struct vio_ver_info {
	struct vio_msg_tag	tag;
	u16			major;
	u16			minor;
	u8			dev_class;
#define VDEV_NETWORK		0x01
#define VDEV_NETWORK_SWITCH	0x02
#define VDEV_DISK		0x03
#define VDEV_DISK_SERVER	0x04
#define VDEV_CONSOLE_CON	0x05

	u8			resv1[3];
	u64			resv2[5];
};

struct vio_dring_register {
	struct vio_msg_tag	tag;
	u64			dring_ident;
	u32			num_descr;
	u32			descr_size;
	u16			options;
#define VIO_TX_DRING		0x0001
#define VIO_RX_DRING		0x0002
#define VIO_RX_DRING_DATA	0x0004
	u16			resv;
	u32			num_cookies;
	struct ldc_trans_cookie	cookies[0];
};

struct vio_dring_unregister {
	struct vio_msg_tag	tag;
	u64			dring_ident;
	u64			resv[5];
};

/* Data transfer modes */
#define VIO_PKT_MODE		0x01 /* Packet based transfer	*/
#define VIO_DESC_MODE		0x02 /* In-band descriptors	*/
#define VIO_DRING_MODE		0x03 /* Descriptor rings	*/
/* in vers >= 1.2, VIO_DRING_MODE is 0x04 and transfer mode is a bitmask */
#define VIO_NEW_DRING_MODE	0x04

struct vio_dring_data {
	struct vio_msg_tag	tag;
	u64			seq;
	u64			dring_ident;
	u32			start_idx;
	u32			end_idx;
	u8			state;
#define VIO_DRING_ACTIVE	0x01
#define VIO_DRING_STOPPED	0x02

	u8			__pad1;
	u16			__pad2;
	u32			__pad3;
	u64			__par4[2];
};

struct vio_dring_hdr {
	u8			state;
#define VIO_DESC_FREE		0x01
#define VIO_DESC_READY		0x02
#define VIO_DESC_ACCEPTED	0x03
#define VIO_DESC_DONE		0x04
	u8			ack;
#define VIO_ACK_ENABLE		0x01
#define VIO_ACK_DISABLE		0x00

	u16			__pad1;
	u32			__pad2;
};

/* VIO disk specific structures and defines */
struct vio_disk_attr_info {
	struct vio_msg_tag	tag;
	u8			xfer_mode;
	u8			vdisk_type;
#define VD_DISK_TYPE_SLICE	0x01 /* Slice in block device	*/
#define VD_DISK_TYPE_DISK	0x02 /* Entire block device	*/
	u8			vdisk_mtype;		/* v1.1 */
#define VD_MEDIA_TYPE_FIXED	0x01 /* Fixed device */
#define VD_MEDIA_TYPE_CD	0x02 /* CD Device    */
#define VD_MEDIA_TYPE_DVD	0x03 /* DVD Device   */
	u8			resv1;
	u32			vdisk_block_size;
	u64			operations;
	u64			vdisk_size;		/* v1.1 */
	u64			max_xfer_size;
	u32			phys_block_size;	/* v1.2 */
	u32			resv2;
	u64			resv3[1];
};

struct vio_disk_desc {
	struct vio_dring_hdr	hdr;
	u64			req_id;
	u8			operation;
#define VD_OP_BREAD		0x01 /* Block read			*/
#define VD_OP_BWRITE		0x02 /* Block write			*/
#define VD_OP_FLUSH		0x03 /* Flush disk contents		*/
#define VD_OP_GET_WCE		0x04 /* Get write-cache status		*/
#define VD_OP_SET_WCE		0x05 /* Enable/disable write-cache	*/
#define VD_OP_GET_VTOC		0x06 /* Get VTOC			*/
#define VD_OP_SET_VTOC		0x07 /* Set VTOC			*/
#define VD_OP_GET_DISKGEOM	0x08 /* Get disk geometry		*/
#define VD_OP_SET_DISKGEOM	0x09 /* Set disk geometry		*/
#define VD_OP_SCSICMD		0x0a /* SCSI control command		*/
#define VD_OP_GET_DEVID		0x0b /* Get device ID			*/
#define VD_OP_GET_EFI		0x0c /* Get EFI				*/
#define VD_OP_SET_EFI		0x0d /* Set EFI				*/
	u8			slice;
	u16			resv1;
	u32			status;
	u64			offset;
	u64			size;
	u32			ncookies;
	u32			resv2;
	struct ldc_trans_cookie	cookies[0];
};

#define VIO_DISK_VNAME_LEN	8
#define VIO_DISK_ALABEL_LEN	128
#define VIO_DISK_NUM_PART	8

struct vio_disk_vtoc {
	u8			volume_name[VIO_DISK_VNAME_LEN];
	u16			sector_size;
	u16			num_partitions;
	u8			ascii_label[VIO_DISK_ALABEL_LEN];
	struct {
		u16		id;
		u16		perm_flags;
		u32		resv;
		u64		start_block;
		u64		num_blocks;
	} partitions[VIO_DISK_NUM_PART];
};

struct vio_disk_geom {
	u16			num_cyl; /* Num data cylinders		*/
	u16			alt_cyl; /* Num alternate cylinders	*/
	u16			beg_cyl; /* Cyl off of fixed head area	*/
	u16			num_hd;  /* Num heads			*/
	u16			num_sec; /* Num sectors			*/
	u16			ifact;   /* Interleave factor		*/
	u16			apc;     /* Alts per cylinder (SCSI)	*/
	u16			rpm;	 /* Revolutions per minute	*/
	u16			phy_cyl; /* Num physical cylinders	*/
	u16			wr_skip; /* Num sects to skip, writes	*/
	u16			rd_skip; /* Num sects to skip, writes	*/
};

struct vio_disk_devid {
	u16			resv;
	u16			type;
	u32			len;
	char			id[0];
};

struct vio_disk_efi {
	u64			lba;
	u64			len;
	char			data[0];
};

/* VIO net specific structures and defines */
struct vio_net_attr_info {
	struct vio_msg_tag	tag;
	u8			xfer_mode;
	u8			addr_type;
#define VNET_ADDR_ETHERMAC	0x01
	u16			ack_freq;
	u8			plnk_updt;
#define PHYSLINK_UPDATE_NONE		0x00
#define PHYSLINK_UPDATE_STATE		0x01
#define PHYSLINK_UPDATE_STATE_ACK	0x02
#define PHYSLINK_UPDATE_STATE_NACK	0x03
	u8			options;
	u16			resv1;
	u64			addr;
	u64			mtu;
	u16			cflags;
#define VNET_LSO_IPV4_CAPAB		0x0001
	u16			ipv4_lso_maxlen;
	u32			resv2;
	u64			resv3[2];
};

#define VNET_NUM_MCAST		7

struct vio_net_mcast_info {
	struct vio_msg_tag	tag;
	u8			set;
	u8			count;
	u8			mcast_addr[VNET_NUM_MCAST * 6];
	u32			resv;
};

struct vio_net_desc {
	struct vio_dring_hdr	hdr;
	u32			size;
	u32			ncookies;
	struct ldc_trans_cookie	cookies[0];
};

struct vio_net_dext {
	u8		flags;
#define VNET_PKT_HASH			0x01
#define	VNET_PKT_HCK_IPV4_HDRCKSUM	0x02
#define	VNET_PKT_HCK_FULLCKSUM		0x04
#define	VNET_PKT_IPV4_LSO		0x08
#define	VNET_PKT_HCK_IPV4_HDRCKSUM_OK	0x10
#define	VNET_PKT_HCK_FULLCKSUM_OK	0x20

	u8		vnet_hashval;
	u16		ipv4_lso_mss;
	u32		resv3;
};

static inline struct vio_net_dext *vio_net_ext(struct vio_net_desc *desc)
{
	return (struct vio_net_dext *)&desc->cookies[2];
}

#define VIO_MAX_RING_COOKIES	24

struct vio_dring_state {
	u64			ident;
	void			*base;
	u64			snd_nxt;
	u64			rcv_nxt;
	u32			entry_size;
	u32			num_entries;
	u32			prod;
	u32			cons;
	u32			pending;
	int			ncookies;
	struct ldc_trans_cookie	cookies[VIO_MAX_RING_COOKIES];
};

#define VIO_TAG_SIZE		((int)sizeof(struct vio_msg_tag))
#define VIO_VCC_MTU_SIZE	(LDC_PACKET_SIZE - VIO_TAG_SIZE)

struct vio_vcc {
	struct vio_msg_tag	tag;
	char			data[VIO_VCC_MTU_SIZE];
};

static inline void *vio_dring_cur(struct vio_dring_state *dr)
{
	return dr->base + (dr->entry_size * dr->prod);
}

static inline void *vio_dring_entry(struct vio_dring_state *dr,
				    unsigned int index)
{
	return dr->base + (dr->entry_size * index);
}

static inline u32 vio_dring_avail(struct vio_dring_state *dr,
				  unsigned int ring_size)
{
	return (dr->pending -
		((dr->prod - dr->cons) & (ring_size - 1)) - 1);
}

static inline u32 vio_dring_next(struct vio_dring_state *dr, u32 index)
{
	if (++index == dr->num_entries)
		index = 0;
	return index;
}

static inline u32 vio_dring_prev(struct vio_dring_state *dr, u32 index)
{
	if (index == 0)
		return dr->num_entries - 1;
	else
		return index - 1;
}

#define VIO_MAX_TYPE_LEN	32
#define VIO_MAX_NAME_LEN	32
#define VIO_MAX_COMPAT_LEN	64

struct vio_dev {
	u64			mp;
	struct device_node	*dp;

	char			node_name[VIO_MAX_NAME_LEN];
	char			type[VIO_MAX_TYPE_LEN];
	char			compat[VIO_MAX_COMPAT_LEN];
	int			compat_len;

	u64			dev_no;

	unsigned long		port_id;
	unsigned long		channel_id;

	unsigned int		tx_irq;
	unsigned int		rx_irq;
	u64			rx_ino;
	u64			tx_ino;

	/* Handle to the root of "channel-devices" sub-tree in MDESC */
	u64			cdev_handle;

	/* MD specific data used to identify the vdev in MD */
	union md_node_info	md_node_info;

	struct device		dev;
};

struct vio_driver {
	const char			*name;
	struct list_head		node;
	const struct vio_device_id	*id_table;
	int (*probe)(struct vio_dev *dev, const struct vio_device_id *id);
	void (*remove)(struct vio_dev *dev);
	void (*shutdown)(struct vio_dev *dev);
	unsigned long			driver_data;
	struct device_driver		driver;
	bool				no_irq;
};

struct vio_version {
	u16		major;
	u16		minor;
};

struct vio_driver_state;
struct vio_driver_ops {
	int	(*send_attr)(struct vio_driver_state *vio);
	int	(*handle_attr)(struct vio_driver_state *vio, void *pkt);
	void	(*handshake_complete)(struct vio_driver_state *vio);
};

struct vio_completion {
	struct completion	com;
	int			err;
	int			waiting_for;
};

struct vio_driver_state {
	/* Protects VIO handshake and, optionally, driver private state.  */
	spinlock_t		lock;

	struct ldc_channel	*lp;

	u32			_peer_sid;
	u32			_local_sid;
	struct vio_dring_state	drings[2];
#define VIO_DRIVER_TX_RING	0
#define VIO_DRIVER_RX_RING	1

	u8			hs_state;
#define VIO_HS_INVALID		0x00
#define VIO_HS_GOTVERS		0x01
#define VIO_HS_GOT_ATTR		0x04
#define VIO_HS_SENT_DREG	0x08
#define VIO_HS_SENT_RDX		0x10
#define VIO_HS_GOT_RDX_ACK	0x20
#define VIO_HS_GOT_RDX		0x40
#define VIO_HS_SENT_RDX_ACK	0x80
#define VIO_HS_COMPLETE		(VIO_HS_GOT_RDX_ACK | VIO_HS_SENT_RDX_ACK)

	u8			dev_class;

	u8			dr_state;
#define VIO_DR_STATE_TXREG	0x01
#define VIO_DR_STATE_RXREG	0x02
#define VIO_DR_STATE_TXREQ	0x10
#define VIO_DR_STATE_RXREQ	0x20

	u8			debug;
#define VIO_DEBUG_HS		0x01
#define VIO_DEBUG_DATA		0x02

	void			*desc_buf;
	unsigned int		desc_buf_len;

	struct vio_completion	*cmp;

	struct vio_dev		*vdev;

	struct timer_list	timer;

	struct vio_version	ver;

	struct vio_version	*ver_table;
	int			ver_table_entries;

	char			*name;

	struct vio_driver_ops	*ops;
};

static inline bool vio_version_before(struct vio_driver_state *vio,
				      u16 major, u16 minor)
{
	u32 have = (u32)vio->ver.major << 16 | vio->ver.minor;
	u32 want = (u32)major << 16 | minor;

	return have < want;
}

static inline bool vio_version_after(struct vio_driver_state *vio,
				      u16 major, u16 minor)
{
	u32 have = (u32)vio->ver.major << 16 | vio->ver.minor;
	u32 want = (u32)major << 16 | minor;

	return have > want;
}

static inline bool vio_version_after_eq(struct vio_driver_state *vio,
					u16 major, u16 minor)
{
	u32 have = (u32)vio->ver.major << 16 | vio->ver.minor;
	u32 want = (u32)major << 16 | minor;

	return have >= want;
}

#define viodbg(TYPE, f, a...) \
do {	if (vio->debug & VIO_DEBUG_##TYPE) \
		printk(KERN_INFO "vio: ID[%lu] " f, \
		       vio->vdev->channel_id, ## a); \
} while (0)

int __vio_register_driver(struct vio_driver *drv, struct module *owner,
				 const char *mod_name);
/*
 * vio_register_driver must be a macro so that KBUILD_MODNAME can be expanded
 */
#define vio_register_driver(driver)		\
	__vio_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
void vio_unregister_driver(struct vio_driver *drv);

static inline struct vio_driver *to_vio_driver(struct device_driver *drv)
{
	return container_of(drv, struct vio_driver, driver);
}

static inline struct vio_dev *to_vio_dev(struct device *dev)
{
	return container_of(dev, struct vio_dev, dev);
}

int vio_ldc_send(struct vio_driver_state *vio, void *data, int len);
void vio_link_state_change(struct vio_driver_state *vio, int event);
void vio_conn_reset(struct vio_driver_state *vio);
int vio_control_pkt_engine(struct vio_driver_state *vio, void *pkt);
int vio_validate_sid(struct vio_driver_state *vio,
		     struct vio_msg_tag *tp);
u32 vio_send_sid(struct vio_driver_state *vio);
int vio_ldc_alloc(struct vio_driver_state *vio,
		  struct ldc_channel_config *base_cfg, void *event_arg);
void vio_ldc_free(struct vio_driver_state *vio);
int vio_driver_init(struct vio_driver_state *vio, struct vio_dev *vdev,
		    u8 dev_class, struct vio_version *ver_table,
		    int ver_table_size, struct vio_driver_ops *ops,
		    char *name);

void vio_port_up(struct vio_driver_state *vio);
int vio_set_intr(unsigned long dev_ino, int state);
u64 vio_vdev_node(struct mdesc_handle *hp, struct vio_dev *vdev);

#endif /* _SPARC64_VIO_H */