1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _SPARC64_VIO_H
3 #define _SPARC64_VIO_H
4 
5 #include <linux/kernel.h>
6 #include <linux/device.h>
7 #include <linux/mod_devicetable.h>
8 #include <linux/timer.h>
9 #include <linux/spinlock.h>
10 #include <linux/completion.h>
11 #include <linux/list.h>
12 #include <linux/log2.h>
13 
14 #include <asm/ldc.h>
15 #include <asm/mdesc.h>
16 
17 struct vio_msg_tag {
18 	u8			type;
19 #define VIO_TYPE_CTRL		0x01
20 #define VIO_TYPE_DATA		0x02
21 #define VIO_TYPE_ERR		0x04
22 
23 	u8			stype;
24 #define VIO_SUBTYPE_INFO	0x01
25 #define VIO_SUBTYPE_ACK		0x02
26 #define VIO_SUBTYPE_NACK	0x04
27 
28 	u16			stype_env;
29 #define VIO_VER_INFO		0x0001
30 #define VIO_ATTR_INFO		0x0002
31 #define VIO_DRING_REG		0x0003
32 #define VIO_DRING_UNREG		0x0004
33 #define VIO_RDX			0x0005
34 #define VIO_PKT_DATA		0x0040
35 #define VIO_DESC_DATA		0x0041
36 #define VIO_DRING_DATA		0x0042
37 #define VNET_MCAST_INFO		0x0101
38 
39 	u32		sid;
40 };
41 
42 struct vio_rdx {
43 	struct vio_msg_tag	tag;
44 	u64			resv[6];
45 };
46 
47 struct vio_ver_info {
48 	struct vio_msg_tag	tag;
49 	u16			major;
50 	u16			minor;
51 	u8			dev_class;
52 #define VDEV_NETWORK		0x01
53 #define VDEV_NETWORK_SWITCH	0x02
54 #define VDEV_DISK		0x03
55 #define VDEV_DISK_SERVER	0x04
56 #define VDEV_CONSOLE_CON	0x05
57 
58 	u8			resv1[3];
59 	u64			resv2[5];
60 };
61 
62 struct vio_dring_register {
63 	struct vio_msg_tag	tag;
64 	u64			dring_ident;
65 	u32			num_descr;
66 	u32			descr_size;
67 	u16			options;
68 #define VIO_TX_DRING		0x0001
69 #define VIO_RX_DRING		0x0002
70 #define VIO_RX_DRING_DATA	0x0004
71 	u16			resv;
72 	u32			num_cookies;
73 	struct ldc_trans_cookie	cookies[0];
74 };
75 
76 struct vio_dring_unregister {
77 	struct vio_msg_tag	tag;
78 	u64			dring_ident;
79 	u64			resv[5];
80 };
81 
82 /* Data transfer modes */
83 #define VIO_PKT_MODE		0x01 /* Packet based transfer	*/
84 #define VIO_DESC_MODE		0x02 /* In-band descriptors	*/
85 #define VIO_DRING_MODE		0x03 /* Descriptor rings	*/
86 /* in vers >= 1.2, VIO_DRING_MODE is 0x04 and transfer mode is a bitmask */
87 #define VIO_NEW_DRING_MODE	0x04
88 
89 struct vio_dring_data {
90 	struct vio_msg_tag	tag;
91 	u64			seq;
92 	u64			dring_ident;
93 	u32			start_idx;
94 	u32			end_idx;
95 	u8			state;
96 #define VIO_DRING_ACTIVE	0x01
97 #define VIO_DRING_STOPPED	0x02
98 
99 	u8			__pad1;
100 	u16			__pad2;
101 	u32			__pad3;
102 	u64			__par4[2];
103 };
104 
105 struct vio_dring_hdr {
106 	u8			state;
107 #define VIO_DESC_FREE		0x01
108 #define VIO_DESC_READY		0x02
109 #define VIO_DESC_ACCEPTED	0x03
110 #define VIO_DESC_DONE		0x04
111 	u8			ack;
112 #define VIO_ACK_ENABLE		0x01
113 #define VIO_ACK_DISABLE		0x00
114 
115 	u16			__pad1;
116 	u32			__pad2;
117 };
118 
119 /* VIO disk specific structures and defines */
120 struct vio_disk_attr_info {
121 	struct vio_msg_tag	tag;
122 	u8			xfer_mode;
123 	u8			vdisk_type;
124 #define VD_DISK_TYPE_SLICE	0x01 /* Slice in block device	*/
125 #define VD_DISK_TYPE_DISK	0x02 /* Entire block device	*/
126 	u8			vdisk_mtype;		/* v1.1 */
127 #define VD_MEDIA_TYPE_FIXED	0x01 /* Fixed device */
128 #define VD_MEDIA_TYPE_CD	0x02 /* CD Device    */
129 #define VD_MEDIA_TYPE_DVD	0x03 /* DVD Device   */
130 	u8			resv1;
131 	u32			vdisk_block_size;
132 	u64			operations;
133 	u64			vdisk_size;		/* v1.1 */
134 	u64			max_xfer_size;
135 	u32			phys_block_size;	/* v1.2 */
136 	u32			resv2;
137 	u64			resv3[1];
138 };
139 
140 struct vio_disk_desc {
141 	struct vio_dring_hdr	hdr;
142 	u64			req_id;
143 	u8			operation;
144 #define VD_OP_BREAD		0x01 /* Block read			*/
145 #define VD_OP_BWRITE		0x02 /* Block write			*/
146 #define VD_OP_FLUSH		0x03 /* Flush disk contents		*/
147 #define VD_OP_GET_WCE		0x04 /* Get write-cache status		*/
148 #define VD_OP_SET_WCE		0x05 /* Enable/disable write-cache	*/
149 #define VD_OP_GET_VTOC		0x06 /* Get VTOC			*/
150 #define VD_OP_SET_VTOC		0x07 /* Set VTOC			*/
151 #define VD_OP_GET_DISKGEOM	0x08 /* Get disk geometry		*/
152 #define VD_OP_SET_DISKGEOM	0x09 /* Set disk geometry		*/
153 #define VD_OP_SCSICMD		0x0a /* SCSI control command		*/
154 #define VD_OP_GET_DEVID		0x0b /* Get device ID			*/
155 #define VD_OP_GET_EFI		0x0c /* Get EFI				*/
156 #define VD_OP_SET_EFI		0x0d /* Set EFI				*/
157 	u8			slice;
158 	u16			resv1;
159 	u32			status;
160 	u64			offset;
161 	u64			size;
162 	u32			ncookies;
163 	u32			resv2;
164 	struct ldc_trans_cookie	cookies[0];
165 };
166 
167 #define VIO_DISK_VNAME_LEN	8
168 #define VIO_DISK_ALABEL_LEN	128
169 #define VIO_DISK_NUM_PART	8
170 
171 struct vio_disk_vtoc {
172 	u8			volume_name[VIO_DISK_VNAME_LEN];
173 	u16			sector_size;
174 	u16			num_partitions;
175 	u8			ascii_label[VIO_DISK_ALABEL_LEN];
176 	struct {
177 		u16		id;
178 		u16		perm_flags;
179 		u32		resv;
180 		u64		start_block;
181 		u64		num_blocks;
182 	} partitions[VIO_DISK_NUM_PART];
183 };
184 
185 struct vio_disk_geom {
186 	u16			num_cyl; /* Num data cylinders		*/
187 	u16			alt_cyl; /* Num alternate cylinders	*/
188 	u16			beg_cyl; /* Cyl off of fixed head area	*/
189 	u16			num_hd;  /* Num heads			*/
190 	u16			num_sec; /* Num sectors			*/
191 	u16			ifact;   /* Interleave factor		*/
192 	u16			apc;     /* Alts per cylinder (SCSI)	*/
193 	u16			rpm;	 /* Revolutions per minute	*/
194 	u16			phy_cyl; /* Num physical cylinders	*/
195 	u16			wr_skip; /* Num sects to skip, writes	*/
196 	u16			rd_skip; /* Num sects to skip, writes	*/
197 };
198 
199 struct vio_disk_devid {
200 	u16			resv;
201 	u16			type;
202 	u32			len;
203 	char			id[0];
204 };
205 
206 struct vio_disk_efi {
207 	u64			lba;
208 	u64			len;
209 	char			data[0];
210 };
211 
212 /* VIO net specific structures and defines */
213 struct vio_net_attr_info {
214 	struct vio_msg_tag	tag;
215 	u8			xfer_mode;
216 	u8			addr_type;
217 #define VNET_ADDR_ETHERMAC	0x01
218 	u16			ack_freq;
219 	u8			plnk_updt;
220 #define PHYSLINK_UPDATE_NONE		0x00
221 #define PHYSLINK_UPDATE_STATE		0x01
222 #define PHYSLINK_UPDATE_STATE_ACK	0x02
223 #define PHYSLINK_UPDATE_STATE_NACK	0x03
224 	u8			options;
225 	u16			resv1;
226 	u64			addr;
227 	u64			mtu;
228 	u16			cflags;
229 #define VNET_LSO_IPV4_CAPAB		0x0001
230 	u16			ipv4_lso_maxlen;
231 	u32			resv2;
232 	u64			resv3[2];
233 };
234 
235 #define VNET_NUM_MCAST		7
236 
237 struct vio_net_mcast_info {
238 	struct vio_msg_tag	tag;
239 	u8			set;
240 	u8			count;
241 	u8			mcast_addr[VNET_NUM_MCAST * 6];
242 	u32			resv;
243 };
244 
245 struct vio_net_desc {
246 	struct vio_dring_hdr	hdr;
247 	u32			size;
248 	u32			ncookies;
249 	struct ldc_trans_cookie	cookies[0];
250 };
251 
252 struct vio_net_dext {
253 	u8		flags;
254 #define VNET_PKT_HASH			0x01
255 #define	VNET_PKT_HCK_IPV4_HDRCKSUM	0x02
256 #define	VNET_PKT_HCK_FULLCKSUM		0x04
257 #define	VNET_PKT_IPV4_LSO		0x08
258 #define	VNET_PKT_HCK_IPV4_HDRCKSUM_OK	0x10
259 #define	VNET_PKT_HCK_FULLCKSUM_OK	0x20
260 
261 	u8		vnet_hashval;
262 	u16		ipv4_lso_mss;
263 	u32		resv3;
264 };
265 
vio_net_ext(struct vio_net_desc * desc)266 static inline struct vio_net_dext *vio_net_ext(struct vio_net_desc *desc)
267 {
268 	return (struct vio_net_dext *)&desc->cookies[2];
269 }
270 
271 #define VIO_MAX_RING_COOKIES	24
272 
273 struct vio_dring_state {
274 	u64			ident;
275 	void			*base;
276 	u64			snd_nxt;
277 	u64			rcv_nxt;
278 	u32			entry_size;
279 	u32			num_entries;
280 	u32			prod;
281 	u32			cons;
282 	u32			pending;
283 	int			ncookies;
284 	struct ldc_trans_cookie	cookies[VIO_MAX_RING_COOKIES];
285 };
286 
287 #define VIO_TAG_SIZE		((int)sizeof(struct vio_msg_tag))
288 #define VIO_VCC_MTU_SIZE	(LDC_PACKET_SIZE - VIO_TAG_SIZE)
289 
290 struct vio_vcc {
291 	struct vio_msg_tag	tag;
292 	char			data[VIO_VCC_MTU_SIZE];
293 };
294 
vio_dring_cur(struct vio_dring_state * dr)295 static inline void *vio_dring_cur(struct vio_dring_state *dr)
296 {
297 	return dr->base + (dr->entry_size * dr->prod);
298 }
299 
vio_dring_entry(struct vio_dring_state * dr,unsigned int index)300 static inline void *vio_dring_entry(struct vio_dring_state *dr,
301 				    unsigned int index)
302 {
303 	return dr->base + (dr->entry_size * index);
304 }
305 
vio_dring_avail(struct vio_dring_state * dr,unsigned int ring_size)306 static inline u32 vio_dring_avail(struct vio_dring_state *dr,
307 				  unsigned int ring_size)
308 {
309 	return (dr->pending -
310 		((dr->prod - dr->cons) & (ring_size - 1)) - 1);
311 }
312 
vio_dring_next(struct vio_dring_state * dr,u32 index)313 static inline u32 vio_dring_next(struct vio_dring_state *dr, u32 index)
314 {
315 	if (++index == dr->num_entries)
316 		index = 0;
317 	return index;
318 }
319 
vio_dring_prev(struct vio_dring_state * dr,u32 index)320 static inline u32 vio_dring_prev(struct vio_dring_state *dr, u32 index)
321 {
322 	if (index == 0)
323 		return dr->num_entries - 1;
324 	else
325 		return index - 1;
326 }
327 
328 #define VIO_MAX_TYPE_LEN	32
329 #define VIO_MAX_NAME_LEN	32
330 #define VIO_MAX_COMPAT_LEN	64
331 
332 struct vio_dev {
333 	u64			mp;
334 	struct device_node	*dp;
335 
336 	char			node_name[VIO_MAX_NAME_LEN];
337 	char			type[VIO_MAX_TYPE_LEN];
338 	char			compat[VIO_MAX_COMPAT_LEN];
339 	int			compat_len;
340 
341 	u64			dev_no;
342 
343 	unsigned long		port_id;
344 	unsigned long		channel_id;
345 
346 	unsigned int		tx_irq;
347 	unsigned int		rx_irq;
348 	u64			rx_ino;
349 	u64			tx_ino;
350 
351 	/* Handle to the root of "channel-devices" sub-tree in MDESC */
352 	u64			cdev_handle;
353 
354 	/* MD specific data used to identify the vdev in MD */
355 	union md_node_info	md_node_info;
356 
357 	struct device		dev;
358 };
359 
360 struct vio_driver {
361 	const char			*name;
362 	struct list_head		node;
363 	const struct vio_device_id	*id_table;
364 	int (*probe)(struct vio_dev *dev, const struct vio_device_id *id);
365 	int (*remove)(struct vio_dev *dev);
366 	void (*shutdown)(struct vio_dev *dev);
367 	unsigned long			driver_data;
368 	struct device_driver		driver;
369 	bool				no_irq;
370 };
371 
372 struct vio_version {
373 	u16		major;
374 	u16		minor;
375 };
376 
377 struct vio_driver_state;
378 struct vio_driver_ops {
379 	int	(*send_attr)(struct vio_driver_state *vio);
380 	int	(*handle_attr)(struct vio_driver_state *vio, void *pkt);
381 	void	(*handshake_complete)(struct vio_driver_state *vio);
382 };
383 
384 struct vio_completion {
385 	struct completion	com;
386 	int			err;
387 	int			waiting_for;
388 };
389 
390 struct vio_driver_state {
391 	/* Protects VIO handshake and, optionally, driver private state.  */
392 	spinlock_t		lock;
393 
394 	struct ldc_channel	*lp;
395 
396 	u32			_peer_sid;
397 	u32			_local_sid;
398 	struct vio_dring_state	drings[2];
399 #define VIO_DRIVER_TX_RING	0
400 #define VIO_DRIVER_RX_RING	1
401 
402 	u8			hs_state;
403 #define VIO_HS_INVALID		0x00
404 #define VIO_HS_GOTVERS		0x01
405 #define VIO_HS_GOT_ATTR		0x04
406 #define VIO_HS_SENT_DREG	0x08
407 #define VIO_HS_SENT_RDX		0x10
408 #define VIO_HS_GOT_RDX_ACK	0x20
409 #define VIO_HS_GOT_RDX		0x40
410 #define VIO_HS_SENT_RDX_ACK	0x80
411 #define VIO_HS_COMPLETE		(VIO_HS_GOT_RDX_ACK | VIO_HS_SENT_RDX_ACK)
412 
413 	u8			dev_class;
414 
415 	u8			dr_state;
416 #define VIO_DR_STATE_TXREG	0x01
417 #define VIO_DR_STATE_RXREG	0x02
418 #define VIO_DR_STATE_TXREQ	0x10
419 #define VIO_DR_STATE_RXREQ	0x20
420 
421 	u8			debug;
422 #define VIO_DEBUG_HS		0x01
423 #define VIO_DEBUG_DATA		0x02
424 
425 	void			*desc_buf;
426 	unsigned int		desc_buf_len;
427 
428 	struct vio_completion	*cmp;
429 
430 	struct vio_dev		*vdev;
431 
432 	struct timer_list	timer;
433 
434 	struct vio_version	ver;
435 
436 	struct vio_version	*ver_table;
437 	int			ver_table_entries;
438 
439 	char			*name;
440 
441 	struct vio_driver_ops	*ops;
442 };
443 
vio_version_before(struct vio_driver_state * vio,u16 major,u16 minor)444 static inline bool vio_version_before(struct vio_driver_state *vio,
445 				      u16 major, u16 minor)
446 {
447 	u32 have = (u32)vio->ver.major << 16 | vio->ver.minor;
448 	u32 want = (u32)major << 16 | minor;
449 
450 	return have < want;
451 }
452 
vio_version_after(struct vio_driver_state * vio,u16 major,u16 minor)453 static inline bool vio_version_after(struct vio_driver_state *vio,
454 				      u16 major, u16 minor)
455 {
456 	u32 have = (u32)vio->ver.major << 16 | vio->ver.minor;
457 	u32 want = (u32)major << 16 | minor;
458 
459 	return have > want;
460 }
461 
vio_version_after_eq(struct vio_driver_state * vio,u16 major,u16 minor)462 static inline bool vio_version_after_eq(struct vio_driver_state *vio,
463 					u16 major, u16 minor)
464 {
465 	u32 have = (u32)vio->ver.major << 16 | vio->ver.minor;
466 	u32 want = (u32)major << 16 | minor;
467 
468 	return have >= want;
469 }
470 
471 #define viodbg(TYPE, f, a...) \
472 do {	if (vio->debug & VIO_DEBUG_##TYPE) \
473 		printk(KERN_INFO "vio: ID[%lu] " f, \
474 		       vio->vdev->channel_id, ## a); \
475 } while (0)
476 
477 int __vio_register_driver(struct vio_driver *drv, struct module *owner,
478 				 const char *mod_name);
479 /*
480  * vio_register_driver must be a macro so that KBUILD_MODNAME can be expanded
481  */
482 #define vio_register_driver(driver)		\
483 	__vio_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
484 void vio_unregister_driver(struct vio_driver *drv);
485 
to_vio_driver(struct device_driver * drv)486 static inline struct vio_driver *to_vio_driver(struct device_driver *drv)
487 {
488 	return container_of(drv, struct vio_driver, driver);
489 }
490 
to_vio_dev(struct device * dev)491 static inline struct vio_dev *to_vio_dev(struct device *dev)
492 {
493 	return container_of(dev, struct vio_dev, dev);
494 }
495 
496 int vio_ldc_send(struct vio_driver_state *vio, void *data, int len);
497 void vio_link_state_change(struct vio_driver_state *vio, int event);
498 void vio_conn_reset(struct vio_driver_state *vio);
499 int vio_control_pkt_engine(struct vio_driver_state *vio, void *pkt);
500 int vio_validate_sid(struct vio_driver_state *vio,
501 		     struct vio_msg_tag *tp);
502 u32 vio_send_sid(struct vio_driver_state *vio);
503 int vio_ldc_alloc(struct vio_driver_state *vio,
504 		  struct ldc_channel_config *base_cfg, void *event_arg);
505 void vio_ldc_free(struct vio_driver_state *vio);
506 int vio_driver_init(struct vio_driver_state *vio, struct vio_dev *vdev,
507 		    u8 dev_class, struct vio_version *ver_table,
508 		    int ver_table_size, struct vio_driver_ops *ops,
509 		    char *name);
510 
511 void vio_port_up(struct vio_driver_state *vio);
512 int vio_set_intr(unsigned long dev_ino, int state);
513 u64 vio_vdev_node(struct mdesc_handle *hp, struct vio_dev *vdev);
514 
515 #endif /* _SPARC64_VIO_H */
516