1 /***********************license start***************
2 * Author: Cavium Networks
4 * Contact: support@caviumnetworks.com
5 * This file is part of the OCTEON SDK
7 * Copyright (c) 2003-2008 Cavium Networks
9 * This file is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License, Version 2, as
11 * published by the Free Software Foundation.
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14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
16 * NONINFRINGEMENT. See the GNU General Public License for more
19 * You should have received a copy of the GNU General Public License
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21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 * or visit http://www.gnu.org/licenses/.
24 * This file may also be available under a different license from Cavium.
25 * Contact Cavium Networks for more information
26 ***********************license end**************************************/
31 * Interface to the hardware Free Pool Allocator.
36 #ifndef __CVMX_FPA_H__
37 #define __CVMX_FPA_H__
39 #include "cvmx-address.h"
40 #include "cvmx-fpa-defs.h"
42 #define CVMX_FPA_NUM_POOLS 8
43 #define CVMX_FPA_MIN_BLOCK_SIZE 128
44 #define CVMX_FPA_ALIGNMENT 128
47 * Structure describing the data format used for stores to the FPA.
53 * the (64-bit word) location in scratchpad to write
57 /* the number of words in the response (0 => no response) */
59 /* the ID of the device on the non-coherent bus */
62 * the address that will appear in the first tick on
67 } cvmx_fpa_iobdma_data_t;
70 * Structure describing the current state of a FPA pool.
73 /* Name it was created under */
75 /* Size of each block */
77 /* The base memory address of whole block */
79 /* The number of elements in the pool at creation */
80 uint64_t starting_element_count;
81 } cvmx_fpa_pool_info_t;
84 * Current state of all the pools. Use access functions
85 * instead of using it directly.
87 extern cvmx_fpa_pool_info_t cvmx_fpa_pool_info[CVMX_FPA_NUM_POOLS];
89 /* CSR typedefs have been moved to cvmx-csr-*.h */
92 * Return the name of the pool
94 * @pool: Pool to get the name of
97 static inline const char *cvmx_fpa_get_name(uint64_t pool)
99 return cvmx_fpa_pool_info[pool].name;
103 * Return the base of the pool
105 * @pool: Pool to get the base of
108 static inline void *cvmx_fpa_get_base(uint64_t pool)
110 return cvmx_fpa_pool_info[pool].base;
114 * Check if a pointer belongs to an FPA pool. Return non-zero
115 * if the supplied pointer is inside the memory controlled by
118 * @pool: Pool to check
119 * @ptr: Pointer to check
120 * Returns Non-zero if pointer is in the pool. Zero if not
122 static inline int cvmx_fpa_is_member(uint64_t pool, void *ptr)
124 return ((ptr >= cvmx_fpa_pool_info[pool].base) &&
126 ((char *)(cvmx_fpa_pool_info[pool].base)) +
127 cvmx_fpa_pool_info[pool].size *
128 cvmx_fpa_pool_info[pool].starting_element_count));
132 * Enable the FPA for use. Must be performed after any CSR
133 * configuration but before any other FPA functions.
135 static inline void cvmx_fpa_enable(void)
137 union cvmx_fpa_ctl_status status;
139 status.u64 = cvmx_read_csr(CVMX_FPA_CTL_STATUS);
142 ("Warning: Enabling FPA when FPA already enabled.\n");
146 * Do runtime check as we allow pass1 compiled code to run on
149 if (cvmx_octeon_is_pass1()) {
150 union cvmx_fpa_fpfx_marks marks;
152 for (i = 1; i < 8; i++) {
154 cvmx_read_csr(CVMX_FPA_FPF1_MARKS + (i - 1) * 8ull);
155 marks.s.fpf_wr = 0xe0;
156 cvmx_write_csr(CVMX_FPA_FPF1_MARKS + (i - 1) * 8ull,
160 /* Enforce a 10 cycle delay between config and enable */
164 /* FIXME: CVMX_FPA_CTL_STATUS read is unmodelled */
167 cvmx_write_csr(CVMX_FPA_CTL_STATUS, status.u64);
171 * Get a new block from the FPA
173 * @pool: Pool to get the block from
174 * Returns Pointer to the block or NULL on failure
176 static inline void *cvmx_fpa_alloc(uint64_t pool)
179 cvmx_read_csr(CVMX_ADDR_DID(CVMX_FULL_DID(CVMX_OCT_DID_FPA, pool)));
181 return cvmx_phys_to_ptr(address);
187 * Asynchronously get a new block from the FPA
189 * @scr_addr: Local scratch address to put response in. This is a byte address,
190 * but must be 8 byte aligned.
191 * @pool: Pool to get the block from
193 static inline void cvmx_fpa_async_alloc(uint64_t scr_addr, uint64_t pool)
195 cvmx_fpa_iobdma_data_t data;
198 * Hardware only uses 64 bit alligned locations, so convert
199 * from byte address to 64-bit index
201 data.s.scraddr = scr_addr >> 3;
203 data.s.did = CVMX_FULL_DID(CVMX_OCT_DID_FPA, pool);
205 cvmx_send_single(data.u64);
209 * Free a block allocated with a FPA pool. Does NOT provide memory
210 * ordering in cases where the memory block was modified by the core.
212 * @ptr: Block to free
213 * @pool: Pool to put it in
215 * Cache lines to invalidate
217 static inline void cvmx_fpa_free_nosync(void *ptr, uint64_t pool,
218 uint64_t num_cache_lines)
221 newptr.u64 = cvmx_ptr_to_phys(ptr);
222 newptr.sfilldidspace.didspace =
223 CVMX_ADDR_DIDSPACE(CVMX_FULL_DID(CVMX_OCT_DID_FPA, pool));
224 /* Prevent GCC from reordering around free */
226 /* value written is number of cache lines not written back */
227 cvmx_write_io(newptr.u64, num_cache_lines);
231 * Free a block allocated with a FPA pool. Provides required memory
232 * ordering in cases where memory block was modified by core.
234 * @ptr: Block to free
235 * @pool: Pool to put it in
237 * Cache lines to invalidate
239 static inline void cvmx_fpa_free(void *ptr, uint64_t pool,
240 uint64_t num_cache_lines)
243 newptr.u64 = cvmx_ptr_to_phys(ptr);
244 newptr.sfilldidspace.didspace =
245 CVMX_ADDR_DIDSPACE(CVMX_FULL_DID(CVMX_OCT_DID_FPA, pool));
247 * Make sure that any previous writes to memory go out before
248 * we free this buffer. This also serves as a barrier to
249 * prevent GCC from reordering operations to after the
253 /* value written is number of cache lines not written back */
254 cvmx_write_io(newptr.u64, num_cache_lines);
258 * Setup a FPA pool to control a new block of memory.
259 * This can only be called once per pool. Make sure proper
260 * locking enforces this.
262 * @pool: Pool to initialize
264 * @name: Constant character string to name this pool.
265 * String is not copied.
266 * @buffer: Pointer to the block of memory to use. This must be
267 * accessable by all processors and external hardware.
268 * @block_size: Size for each block controlled by the FPA
269 * @num_blocks: Number of blocks
271 * Returns 0 on Success,
274 extern int cvmx_fpa_setup_pool(uint64_t pool, const char *name, void *buffer,
275 uint64_t block_size, uint64_t num_blocks);
278 * Shutdown a Memory pool and validate that it had all of
279 * the buffers originally placed in it. This should only be
280 * called by one processor after all hardware has finished
283 * @pool: Pool to shutdown
284 * Returns Zero on success
285 * - Positive is count of missing buffers
286 * - Negative is too many buffers or corrupted pointers
288 extern uint64_t cvmx_fpa_shutdown_pool(uint64_t pool);
291 * Get the size of blocks controlled by the pool
292 * This is resolved to a constant at compile time.
294 * @pool: Pool to access
295 * Returns Size of the block in bytes
297 uint64_t cvmx_fpa_get_block_size(uint64_t pool);
299 #endif /* __CVM_FPA_H__ */