summaryrefslogtreecommitdiff
path: root/arch/mips/include/asm/octeon/cvmx-fpa.h
blob: c00501d0f7ae078168b936691e466d9a8968f5d2 (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
/***********************license start***************
 * Author: Cavium Networks
 *
 * Contact: support@caviumnetworks.com
 * This file is part of the OCTEON SDK
 *
 * Copyright (c) 2003-2008 Cavium Networks
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this file; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 * or visit http://www.gnu.org/licenses/.
 *
 * This file may also be available under a different license from Cavium.
 * Contact Cavium Networks for more information
 ***********************license end**************************************/

/**
 * @file
 *
 * Interface to the hardware Free Pool Allocator.
 *
 *
 */

#ifndef __CVMX_FPA_H__
#define __CVMX_FPA_H__

#include <asm/octeon/cvmx-address.h>
#include <asm/octeon/cvmx-fpa-defs.h>

#define CVMX_FPA_NUM_POOLS	8
#define CVMX_FPA_MIN_BLOCK_SIZE 128
#define CVMX_FPA_ALIGNMENT	128

/**
 * Structure describing the data format used for stores to the FPA.
 */
typedef union {
	uint64_t u64;
	struct {
#ifdef __BIG_ENDIAN_BITFIELD
		/*
		 * the (64-bit word) location in scratchpad to write
		 * to (if len != 0)
		 */
		uint64_t scraddr:8;
		/* the number of words in the response (0 => no response) */
		uint64_t len:8;
		/* the ID of the device on the non-coherent bus */
		uint64_t did:8;
		/*
		 * the address that will appear in the first tick on
		 * the NCB bus.
		 */
		uint64_t addr:40;
#else
		uint64_t addr:40;
		uint64_t did:8;
		uint64_t len:8;
		uint64_t scraddr:8;
#endif
	} s;
} cvmx_fpa_iobdma_data_t;

/**
 * Structure describing the current state of a FPA pool.
 */
typedef struct {
	/* Name it was created under */
	const char *name;
	/* Size of each block */
	uint64_t size;
	/* The base memory address of whole block */
	void *base;
	/* The number of elements in the pool at creation */
	uint64_t starting_element_count;
} cvmx_fpa_pool_info_t;

/**
 * Current state of all the pools. Use access functions
 * instead of using it directly.
 */
extern cvmx_fpa_pool_info_t cvmx_fpa_pool_info[CVMX_FPA_NUM_POOLS];

/* CSR typedefs have been moved to cvmx-csr-*.h */

/**
 * Return the name of the pool
 *
 * @pool:   Pool to get the name of
 * Returns The name
 */
static inline const char *cvmx_fpa_get_name(uint64_t pool)
{
	return cvmx_fpa_pool_info[pool].name;
}

/**
 * Return the base of the pool
 *
 * @pool:   Pool to get the base of
 * Returns The base
 */
static inline void *cvmx_fpa_get_base(uint64_t pool)
{
	return cvmx_fpa_pool_info[pool].base;
}

/**
 * Check if a pointer belongs to an FPA pool. Return non-zero
 * if the supplied pointer is inside the memory controlled by
 * an FPA pool.
 *
 * @pool:   Pool to check
 * @ptr:    Pointer to check
 * Returns Non-zero if pointer is in the pool. Zero if not
 */
static inline int cvmx_fpa_is_member(uint64_t pool, void *ptr)
{
	return ((ptr >= cvmx_fpa_pool_info[pool].base) &&
		((char *)ptr <
		 ((char *)(cvmx_fpa_pool_info[pool].base)) +
		 cvmx_fpa_pool_info[pool].size *
		 cvmx_fpa_pool_info[pool].starting_element_count));
}

/**
 * Enable the FPA for use. Must be performed after any CSR
 * configuration but before any other FPA functions.
 */
static inline void cvmx_fpa_enable(void)
{
	union cvmx_fpa_ctl_status status;

	status.u64 = cvmx_read_csr(CVMX_FPA_CTL_STATUS);
	if (status.s.enb) {
		cvmx_dprintf
		    ("Warning: Enabling FPA when FPA already enabled.\n");
	}

	/*
	 * Do runtime check as we allow pass1 compiled code to run on
	 * pass2 chips.
	 */
	if (cvmx_octeon_is_pass1()) {
		union cvmx_fpa_fpfx_marks marks;
		int i;
		for (i = 1; i < 8; i++) {
			marks.u64 =
			    cvmx_read_csr(CVMX_FPA_FPF1_MARKS + (i - 1) * 8ull);
			marks.s.fpf_wr = 0xe0;
			cvmx_write_csr(CVMX_FPA_FPF1_MARKS + (i - 1) * 8ull,
				       marks.u64);
		}

		/* Enforce a 10 cycle delay between config and enable */
		cvmx_wait(10);
	}

	/* FIXME: CVMX_FPA_CTL_STATUS read is unmodelled */
	status.u64 = 0;
	status.s.enb = 1;
	cvmx_write_csr(CVMX_FPA_CTL_STATUS, status.u64);
}

/**
 * Get a new block from the FPA
 *
 * @pool:   Pool to get the block from
 * Returns Pointer to the block or NULL on failure
 */
static inline void *cvmx_fpa_alloc(uint64_t pool)
{
	uint64_t address =
	    cvmx_read_csr(CVMX_ADDR_DID(CVMX_FULL_DID(CVMX_OCT_DID_FPA, pool)));
	if (address)
		return cvmx_phys_to_ptr(address);
	else
		return NULL;
}

/**
 * Asynchronously get a new block from the FPA
 *
 * @scr_addr: Local scratch address to put response in.	 This is a byte address,
 *		    but must be 8 byte aligned.
 * @pool:      Pool to get the block from
 */
static inline void cvmx_fpa_async_alloc(uint64_t scr_addr, uint64_t pool)
{
	cvmx_fpa_iobdma_data_t data;

	/*
	 * Hardware only uses 64 bit aligned locations, so convert
	 * from byte address to 64-bit index
	 */
	data.s.scraddr = scr_addr >> 3;
	data.s.len = 1;
	data.s.did = CVMX_FULL_DID(CVMX_OCT_DID_FPA, pool);
	data.s.addr = 0;
	cvmx_send_single(data.u64);
}

/**
 * Free a block allocated with a FPA pool.  Does NOT provide memory
 * ordering in cases where the memory block was modified by the core.
 *
 * @ptr:    Block to free
 * @pool:   Pool to put it in
 * @num_cache_lines:
 *		 Cache lines to invalidate
 */
static inline void cvmx_fpa_free_nosync(void *ptr, uint64_t pool,
					uint64_t num_cache_lines)
{
	cvmx_addr_t newptr;
	newptr.u64 = cvmx_ptr_to_phys(ptr);
	newptr.sfilldidspace.didspace =
	    CVMX_ADDR_DIDSPACE(CVMX_FULL_DID(CVMX_OCT_DID_FPA, pool));
	/* Prevent GCC from reordering around free */
	barrier();
	/* value written is number of cache lines not written back */
	cvmx_write_io(newptr.u64, num_cache_lines);
}

/**
 * Free a block allocated with a FPA pool.  Provides required memory
 * ordering in cases where memory block was modified by core.
 *
 * @ptr:    Block to free
 * @pool:   Pool to put it in
 * @num_cache_lines:
 *		 Cache lines to invalidate
 */
static inline void cvmx_fpa_free(void *ptr, uint64_t pool,
				 uint64_t num_cache_lines)
{
	cvmx_addr_t newptr;
	newptr.u64 = cvmx_ptr_to_phys(ptr);
	newptr.sfilldidspace.didspace =
	    CVMX_ADDR_DIDSPACE(CVMX_FULL_DID(CVMX_OCT_DID_FPA, pool));
	/*
	 * Make sure that any previous writes to memory go out before
	 * we free this buffer.	 This also serves as a barrier to
	 * prevent GCC from reordering operations to after the
	 * free.
	 */
	CVMX_SYNCWS;
	/* value written is number of cache lines not written back */
	cvmx_write_io(newptr.u64, num_cache_lines);
}

/**
 * Setup a FPA pool to control a new block of memory.
 * This can only be called once per pool. Make sure proper
 * locking enforces this.
 *
 * @pool:	Pool to initialize
 *		     0 <= pool < 8
 * @name:	Constant character string to name this pool.
 *		     String is not copied.
 * @buffer:	Pointer to the block of memory to use. This must be
 *		     accessible by all processors and external hardware.
 * @block_size: Size for each block controlled by the FPA
 * @num_blocks: Number of blocks
 *
 * Returns 0 on Success,
 *	   -1 on failure
 */
extern int cvmx_fpa_setup_pool(uint64_t pool, const char *name, void *buffer,
			       uint64_t block_size, uint64_t num_blocks);

/**
 * Shutdown a Memory pool and validate that it had all of
 * the buffers originally placed in it. This should only be
 * called by one processor after all hardware has finished
 * using the pool.
 *
 * @pool:   Pool to shutdown
 * Returns Zero on success
 *	   - Positive is count of missing buffers
 *	   - Negative is too many buffers or corrupted pointers
 */
extern uint64_t cvmx_fpa_shutdown_pool(uint64_t pool);

/**
 * Get the size of blocks controlled by the pool
 * This is resolved to a constant at compile time.
 *
 * @pool:   Pool to access
 * Returns Size of the block in bytes
 */
uint64_t cvmx_fpa_get_block_size(uint64_t pool);

#endif /*  __CVM_FPA_H__ */