summaryrefslogtreecommitdiff
path: root/include/linux/fsl/mc.h
blob: 765ba41f5987fb1303c34fbaaaf72eaed121c8f0 (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
/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Freescale Management Complex (MC) bus public interface
 *
 * Copyright (C) 2014-2016 Freescale Semiconductor, Inc.
 * Author: German Rivera <German.Rivera@freescale.com>
 *
 */
#ifndef _FSL_MC_H_
#define _FSL_MC_H_

#include <linux/device.h>
#include <linux/mod_devicetable.h>
#include <linux/interrupt.h>

#define FSL_MC_VENDOR_FREESCALE	0x1957

struct irq_domain;
struct msi_domain_info;

struct fsl_mc_device;
struct fsl_mc_io;

/**
 * struct fsl_mc_driver - MC object device driver object
 * @driver: Generic device driver
 * @match_id_table: table of supported device matching Ids
 * @probe: Function called when a device is added
 * @remove: Function called when a device is removed
 * @shutdown: Function called at shutdown time to quiesce the device
 * @suspend: Function called when a device is stopped
 * @resume: Function called when a device is resumed
 *
 * Generic DPAA device driver object for device drivers that are registered
 * with a DPRC bus. This structure is to be embedded in each device-specific
 * driver structure.
 */
struct fsl_mc_driver {
	struct device_driver driver;
	const struct fsl_mc_device_id *match_id_table;
	int (*probe)(struct fsl_mc_device *dev);
	int (*remove)(struct fsl_mc_device *dev);
	void (*shutdown)(struct fsl_mc_device *dev);
	int (*suspend)(struct fsl_mc_device *dev, pm_message_t state);
	int (*resume)(struct fsl_mc_device *dev);
};

#define to_fsl_mc_driver(_drv) \
	container_of(_drv, struct fsl_mc_driver, driver)

/**
 * enum fsl_mc_pool_type - Types of allocatable MC bus resources
 *
 * Entries in these enum are used as indices in the array of resource
 * pools of an fsl_mc_bus object.
 */
enum fsl_mc_pool_type {
	FSL_MC_POOL_DPMCP = 0x0,    /* corresponds to "dpmcp" in the MC */
	FSL_MC_POOL_DPBP,	    /* corresponds to "dpbp" in the MC */
	FSL_MC_POOL_DPCON,	    /* corresponds to "dpcon" in the MC */
	FSL_MC_POOL_IRQ,

	/*
	 * NOTE: New resource pool types must be added before this entry
	 */
	FSL_MC_NUM_POOL_TYPES
};

/**
 * struct fsl_mc_resource - MC generic resource
 * @type: type of resource
 * @id: unique MC resource Id within the resources of the same type
 * @data: pointer to resource-specific data if the resource is currently
 * allocated, or NULL if the resource is not currently allocated.
 * @parent_pool: pointer to the parent resource pool from which this
 * resource is allocated from.
 * @node: Node in the free list of the corresponding resource pool
 *
 * NOTE: This structure is to be embedded as a field of specific
 * MC resource structures.
 */
struct fsl_mc_resource {
	enum fsl_mc_pool_type type;
	s32 id;
	void *data;
	struct fsl_mc_resource_pool *parent_pool;
	struct list_head node;
};

/**
 * struct fsl_mc_device_irq - MC object device message-based interrupt
 * @msi_desc: pointer to MSI descriptor allocated by fsl_mc_msi_alloc_descs()
 * @mc_dev: MC object device that owns this interrupt
 * @dev_irq_index: device-relative IRQ index
 * @resource: MC generic resource associated with the interrupt
 */
struct fsl_mc_device_irq {
	struct msi_desc *msi_desc;
	struct fsl_mc_device *mc_dev;
	u8 dev_irq_index;
	struct fsl_mc_resource resource;
};

#define to_fsl_mc_irq(_mc_resource) \
	container_of(_mc_resource, struct fsl_mc_device_irq, resource)

/* Opened state - Indicates that an object is open by at least one owner */
#define FSL_MC_OBJ_STATE_OPEN		0x00000001
/* Plugged state - Indicates that the object is plugged */
#define FSL_MC_OBJ_STATE_PLUGGED	0x00000002

/**
 * Shareability flag - Object flag indicating no memory shareability.
 * the object generates memory accesses that are non coherent with other
 * masters;
 * user is responsible for proper memory handling through IOMMU configuration.
 */
#define FSL_MC_OBJ_FLAG_NO_MEM_SHAREABILITY	0x0001

/**
 * struct fsl_mc_obj_desc - Object descriptor
 * @type: Type of object: NULL terminated string
 * @id: ID of logical object resource
 * @vendor: Object vendor identifier
 * @ver_major: Major version number
 * @ver_minor:  Minor version number
 * @irq_count: Number of interrupts supported by the object
 * @region_count: Number of mappable regions supported by the object
 * @state: Object state: combination of FSL_MC_OBJ_STATE_ states
 * @label: Object label: NULL terminated string
 * @flags: Object's flags
 */
struct fsl_mc_obj_desc {
	char type[16];
	int id;
	u16 vendor;
	u16 ver_major;
	u16 ver_minor;
	u8 irq_count;
	u8 region_count;
	u32 state;
	char label[16];
	u16 flags;
};

/**
 * Bit masks for a MC object device (struct fsl_mc_device) flags
 */
#define FSL_MC_IS_DPRC	0x0001

/**
 * struct fsl_mc_device - MC object device object
 * @dev: Linux driver model device object
 * @dma_mask: Default DMA mask
 * @flags: MC object device flags
 * @icid: Isolation context ID for the device
 * @mc_handle: MC handle for the corresponding MC object opened
 * @mc_io: Pointer to MC IO object assigned to this device or
 * NULL if none.
 * @obj_desc: MC description of the DPAA device
 * @regions: pointer to array of MMIO region entries
 * @irqs: pointer to array of pointers to interrupts allocated to this device
 * @resource: generic resource associated with this MC object device, if any.
 *
 * Generic device object for MC object devices that are "attached" to a
 * MC bus.
 *
 * NOTES:
 * - For a non-DPRC object its icid is the same as its parent DPRC's icid.
 * - The SMMU notifier callback gets invoked after device_add() has been
 *   called for an MC object device, but before the device-specific probe
 *   callback gets called.
 * - DP_OBJ_DPRC objects are the only MC objects that have built-in MC
 *   portals. For all other MC objects, their device drivers are responsible for
 *   allocating MC portals for them by calling fsl_mc_portal_allocate().
 * - Some types of MC objects (e.g., DP_OBJ_DPBP, DP_OBJ_DPCON) are
 *   treated as resources that can be allocated/deallocated from the
 *   corresponding resource pool in the object's parent DPRC, using the
 *   fsl_mc_object_allocate()/fsl_mc_object_free() functions. These MC objects
 *   are known as "allocatable" objects. For them, the corresponding
 *   fsl_mc_device's 'resource' points to the associated resource object.
 *   For MC objects that are not allocatable (e.g., DP_OBJ_DPRC, DP_OBJ_DPNI),
 *   'resource' is NULL.
 */
struct fsl_mc_device {
	struct device dev;
	u64 dma_mask;
	u16 flags;
	u16 icid;
	u16 mc_handle;
	struct fsl_mc_io *mc_io;
	struct fsl_mc_obj_desc obj_desc;
	struct resource *regions;
	struct fsl_mc_device_irq **irqs;
	struct fsl_mc_resource *resource;
};

#define to_fsl_mc_device(_dev) \
	container_of(_dev, struct fsl_mc_device, dev)

#define MC_CMD_NUM_OF_PARAMS	7

struct mc_cmd_header {
	u8 src_id;
	u8 flags_hw;
	u8 status;
	u8 flags_sw;
	__le16 token;
	__le16 cmd_id;
};

struct mc_command {
	u64 header;
	u64 params[MC_CMD_NUM_OF_PARAMS];
};

enum mc_cmd_status {
	MC_CMD_STATUS_OK = 0x0, /* Completed successfully */
	MC_CMD_STATUS_READY = 0x1, /* Ready to be processed */
	MC_CMD_STATUS_AUTH_ERR = 0x3, /* Authentication error */
	MC_CMD_STATUS_NO_PRIVILEGE = 0x4, /* No privilege */
	MC_CMD_STATUS_DMA_ERR = 0x5, /* DMA or I/O error */
	MC_CMD_STATUS_CONFIG_ERR = 0x6, /* Configuration error */
	MC_CMD_STATUS_TIMEOUT = 0x7, /* Operation timed out */
	MC_CMD_STATUS_NO_RESOURCE = 0x8, /* No resources */
	MC_CMD_STATUS_NO_MEMORY = 0x9, /* No memory available */
	MC_CMD_STATUS_BUSY = 0xA, /* Device is busy */
	MC_CMD_STATUS_UNSUPPORTED_OP = 0xB, /* Unsupported operation */
	MC_CMD_STATUS_INVALID_STATE = 0xC /* Invalid state */
};

/*
 * MC command flags
 */

/* High priority flag */
#define MC_CMD_FLAG_PRI		0x80
/* Command completion flag */
#define MC_CMD_FLAG_INTR_DIS	0x01

static inline u64 mc_encode_cmd_header(u16 cmd_id,
				       u32 cmd_flags,
				       u16 token)
{
	u64 header = 0;
	struct mc_cmd_header *hdr = (struct mc_cmd_header *)&header;

	hdr->cmd_id = cpu_to_le16(cmd_id);
	hdr->token  = cpu_to_le16(token);
	hdr->status = MC_CMD_STATUS_READY;
	if (cmd_flags & MC_CMD_FLAG_PRI)
		hdr->flags_hw = MC_CMD_FLAG_PRI;
	if (cmd_flags & MC_CMD_FLAG_INTR_DIS)
		hdr->flags_sw = MC_CMD_FLAG_INTR_DIS;

	return header;
}

static inline u16 mc_cmd_hdr_read_token(struct mc_command *cmd)
{
	struct mc_cmd_header *hdr = (struct mc_cmd_header *)&cmd->header;
	u16 token = le16_to_cpu(hdr->token);

	return token;
}

struct mc_rsp_create {
	__le32 object_id;
};

struct mc_rsp_api_ver {
	__le16 major_ver;
	__le16 minor_ver;
};

static inline u32 mc_cmd_read_object_id(struct mc_command *cmd)
{
	struct mc_rsp_create *rsp_params;

	rsp_params = (struct mc_rsp_create *)cmd->params;
	return le32_to_cpu(rsp_params->object_id);
}

static inline void mc_cmd_read_api_version(struct mc_command *cmd,
					   u16 *major_ver,
					   u16 *minor_ver)
{
	struct mc_rsp_api_ver *rsp_params;

	rsp_params = (struct mc_rsp_api_ver *)cmd->params;
	*major_ver = le16_to_cpu(rsp_params->major_ver);
	*minor_ver = le16_to_cpu(rsp_params->minor_ver);
}

/**
 * Bit masks for a MC I/O object (struct fsl_mc_io) flags
 */
#define FSL_MC_IO_ATOMIC_CONTEXT_PORTAL	0x0001

/**
 * struct fsl_mc_io - MC I/O object to be passed-in to mc_send_command()
 * @dev: device associated with this Mc I/O object
 * @flags: flags for mc_send_command()
 * @portal_size: MC command portal size in bytes
 * @portal_phys_addr: MC command portal physical address
 * @portal_virt_addr: MC command portal virtual address
 * @dpmcp_dev: pointer to the DPMCP device associated with the MC portal.
 *
 * Fields are only meaningful if the FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag is not
 * set:
 * @mutex: Mutex to serialize mc_send_command() calls that use the same MC
 * portal, if the fsl_mc_io object was created with the
 * FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag off. mc_send_command() calls for this
 * fsl_mc_io object must be made only from non-atomic context.
 *
 * Fields are only meaningful if the FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag is
 * set:
 * @spinlock: Spinlock to serialize mc_send_command() calls that use the same MC
 * portal, if the fsl_mc_io object was created with the
 * FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag on. mc_send_command() calls for this
 * fsl_mc_io object can be made from atomic or non-atomic context.
 */
struct fsl_mc_io {
	struct device *dev;
	u16 flags;
	u32 portal_size;
	phys_addr_t portal_phys_addr;
	void __iomem *portal_virt_addr;
	struct fsl_mc_device *dpmcp_dev;
	union {
		/*
		 * This field is only meaningful if the
		 * FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag is not set
		 */
		struct mutex mutex; /* serializes mc_send_command() */

		/*
		 * This field is only meaningful if the
		 * FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag is set
		 */
		spinlock_t spinlock;	/* serializes mc_send_command() */
	};
};

int mc_send_command(struct fsl_mc_io *mc_io, struct mc_command *cmd);

#ifdef CONFIG_FSL_MC_BUS
#define dev_is_fsl_mc(_dev) ((_dev)->bus == &fsl_mc_bus_type)
#else
/* If fsl-mc bus is not present device cannot belong to fsl-mc bus */
#define dev_is_fsl_mc(_dev) (0)
#endif

/*
 * module_fsl_mc_driver() - Helper macro for drivers that don't do
 * anything special in module init/exit.  This eliminates a lot of
 * boilerplate.  Each module may only use this macro once, and
 * calling it replaces module_init() and module_exit()
 */
#define module_fsl_mc_driver(__fsl_mc_driver) \
	module_driver(__fsl_mc_driver, fsl_mc_driver_register, \
		      fsl_mc_driver_unregister)

/*
 * Macro to avoid include chaining to get THIS_MODULE
 */
#define fsl_mc_driver_register(drv) \
	__fsl_mc_driver_register(drv, THIS_MODULE)

int __must_check __fsl_mc_driver_register(struct fsl_mc_driver *fsl_mc_driver,
					  struct module *owner);

void fsl_mc_driver_unregister(struct fsl_mc_driver *driver);

int __must_check fsl_mc_portal_allocate(struct fsl_mc_device *mc_dev,
					u16 mc_io_flags,
					struct fsl_mc_io **new_mc_io);

void fsl_mc_portal_free(struct fsl_mc_io *mc_io);

int fsl_mc_portal_reset(struct fsl_mc_io *mc_io);

int __must_check fsl_mc_object_allocate(struct fsl_mc_device *mc_dev,
					enum fsl_mc_pool_type pool_type,
					struct fsl_mc_device **new_mc_adev);

void fsl_mc_object_free(struct fsl_mc_device *mc_adev);

struct irq_domain *fsl_mc_msi_create_irq_domain(struct fwnode_handle *fwnode,
						struct msi_domain_info *info,
						struct irq_domain *parent);

int __must_check fsl_mc_allocate_irqs(struct fsl_mc_device *mc_dev);

void fsl_mc_free_irqs(struct fsl_mc_device *mc_dev);

extern struct bus_type fsl_mc_bus_type;

extern struct device_type fsl_mc_bus_dprc_type;
extern struct device_type fsl_mc_bus_dpni_type;
extern struct device_type fsl_mc_bus_dpio_type;
extern struct device_type fsl_mc_bus_dpsw_type;
extern struct device_type fsl_mc_bus_dpbp_type;
extern struct device_type fsl_mc_bus_dpcon_type;
extern struct device_type fsl_mc_bus_dpmcp_type;
extern struct device_type fsl_mc_bus_dpmac_type;
extern struct device_type fsl_mc_bus_dprtc_type;

static inline bool is_fsl_mc_bus_dprc(const struct fsl_mc_device *mc_dev)
{
	return mc_dev->dev.type == &fsl_mc_bus_dprc_type;
}

static inline bool is_fsl_mc_bus_dpni(const struct fsl_mc_device *mc_dev)
{
	return mc_dev->dev.type == &fsl_mc_bus_dpni_type;
}

static inline bool is_fsl_mc_bus_dpio(const struct fsl_mc_device *mc_dev)
{
	return mc_dev->dev.type == &fsl_mc_bus_dpio_type;
}

static inline bool is_fsl_mc_bus_dpsw(const struct fsl_mc_device *mc_dev)
{
	return mc_dev->dev.type == &fsl_mc_bus_dpsw_type;
}

static inline bool is_fsl_mc_bus_dpbp(const struct fsl_mc_device *mc_dev)
{
	return mc_dev->dev.type == &fsl_mc_bus_dpbp_type;
}

static inline bool is_fsl_mc_bus_dpcon(const struct fsl_mc_device *mc_dev)
{
	return mc_dev->dev.type == &fsl_mc_bus_dpcon_type;
}

static inline bool is_fsl_mc_bus_dpmcp(const struct fsl_mc_device *mc_dev)
{
	return mc_dev->dev.type == &fsl_mc_bus_dpmcp_type;
}

static inline bool is_fsl_mc_bus_dpmac(const struct fsl_mc_device *mc_dev)
{
	return mc_dev->dev.type == &fsl_mc_bus_dpmac_type;
}

static inline bool is_fsl_mc_bus_dprtc(const struct fsl_mc_device *mc_dev)
{
	return mc_dev->dev.type == &fsl_mc_bus_dprtc_type;
}

#endif /* _FSL_MC_H_ */