drivers/staging/octeon/cvmx-fpa.c

/***********************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
 *
 * Support library for the hardware Free Pool Allocator.
 *
 *
 */

#include "cvmx-config.h"
#include "cvmx.h"
#include "cvmx-fpa.h"
#include "cvmx-ipd.h"

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

/**
 * Setup a FPA pool to control a new block of memory. The
 * buffer pointer must be a physical address.
 *
 * @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
 *                   accessable 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
 */
int cvmx_fpa_setup_pool(uint64_t pool, const char *name, void *buffer,
			uint64_t block_size, uint64_t num_blocks)
{
	char *ptr;
	if (!buffer) {
		cvmx_dprintf
		    ("ERROR: cvmx_fpa_setup_pool: NULL buffer pointer!\n");
		return -1;
	}
	if (pool >= CVMX_FPA_NUM_POOLS) {
		cvmx_dprintf("ERROR: cvmx_fpa_setup_pool: Illegal pool!\n");
		return -1;
	}

	if (block_size < CVMX_FPA_MIN_BLOCK_SIZE) {
		cvmx_dprintf
		    ("ERROR: cvmx_fpa_setup_pool: Block size too small.\n");
		return -1;
	}

	if (((unsigned long)buffer & (CVMX_FPA_ALIGNMENT - 1)) != 0) {
		cvmx_dprintf
		    ("ERROR: cvmx_fpa_setup_pool: Buffer not aligned properly.\n");
		return -1;
	}

	cvmx_fpa_pool_info[pool].name = name;
	cvmx_fpa_pool_info[pool].size = block_size;
	cvmx_fpa_pool_info[pool].starting_element_count = num_blocks;
	cvmx_fpa_pool_info[pool].base = buffer;

	ptr = (char *)buffer;
	while (num_blocks--) {
		cvmx_fpa_free(ptr, pool, 0);
		ptr += block_size;
	}
	return 0;
}

/**
 * Shutdown a Memory pool and validate that it had all of
 * the buffers originally placed in it.
 *
 * @pool:   Pool to shutdown
 * Returns Zero on success
 *         - Positive is count of missing buffers
 *         - Negative is too many buffers or corrupted pointers
 */
uint64_t cvmx_fpa_shutdown_pool(uint64_t pool)
{
	uint64_t errors = 0;
	uint64_t count = 0;
	uint64_t base = cvmx_ptr_to_phys(cvmx_fpa_pool_info[pool].base);
	uint64_t finish =
	    base +
	    cvmx_fpa_pool_info[pool].size *
	    cvmx_fpa_pool_info[pool].starting_element_count;
	void *ptr;
	uint64_t address;

	count = 0;
	do {
		ptr = cvmx_fpa_alloc(pool);
		if (ptr)
			address = cvmx_ptr_to_phys(ptr);
		else
			address = 0;
		if (address) {
			if ((address >= base) && (address < finish) &&
			    (((address -
			       base) % cvmx_fpa_pool_info[pool].size) == 0)) {
				count++;
			} else {
				cvmx_dprintf
				    ("ERROR: cvmx_fpa_shutdown_pool: Illegal address 0x%llx in pool %s(%d)\n",
				     (unsigned long long)address,
				     cvmx_fpa_pool_info[pool].name, (int)pool);
				errors++;
			}
		}
	} while (address);

#ifdef CVMX_ENABLE_PKO_FUNCTIONS
	if (pool == 0)
		cvmx_ipd_free_ptr();
#endif

	if (errors) {
		cvmx_dprintf
		    ("ERROR: cvmx_fpa_shutdown_pool: Pool %s(%d) started at 0x%llx, ended at 0x%llx, with a step of 0x%llx\n",
		     cvmx_fpa_pool_info[pool].name, (int)pool,
		     (unsigned long long)base, (unsigned long long)finish,
		     (unsigned long long)cvmx_fpa_pool_info[pool].size);
		return -errors;
	} else
		return 0;
}

uint64_t cvmx_fpa_get_block_size(uint64_t pool)
{
	switch (pool) {
	case 0:
		return CVMX_FPA_POOL_0_SIZE;
	case 1:
		return CVMX_FPA_POOL_1_SIZE;
	case 2:
		return CVMX_FPA_POOL_2_SIZE;
	case 3:
		return CVMX_FPA_POOL_3_SIZE;
	case 4:
		return CVMX_FPA_POOL_4_SIZE;
	case 5:
		return CVMX_FPA_POOL_5_SIZE;
	case 6:
		return CVMX_FPA_POOL_6_SIZE;
	case 7:
		return CVMX_FPA_POOL_7_SIZE;
	default:
		return 0;
	}
}