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/***********************license start***************
* Copyright (c) 2003-2010 Cavium Inc. (support@cavium.com). All rights
* reserved.
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of Cavium Inc. nor the names of
* its contributors may be used to endorse or promote products
* derived from this software without specific prior written
* permission.
* This Software, including technical data, may be subject to U.S. export control
* laws, including the U.S. Export Administration Act and its associated
* regulations, and may be subject to export or import regulations in other
* countries.
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
* AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS OR
* WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO
* THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR
* DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM
* SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE,
* MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF
* VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR
* CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR
* PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
***********************license end**************************************/
/**
* @file
*
* Support library for the hardware Free Pool Allocator.
*
* <hr>$Revision: 70030 $<hr>
*
*/
#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.
*
* @param pool Pool to initialize
* 0 <= pool < 8
* @param name Constant character string to name this pool.
* String is not copied.
* @param buffer Pointer to the block of memory to use. This must be
* accessable by all processors and external hardware.
* @param block_size Size for each block controlled by the FPA
* @param num_blocks Number of blocks
*
* @return 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. This should only be
* called by one processor after all hardware has finished
* using the pool. Most like you will want to have called
* cvmx_helper_shutdown_packet_io_global() before this
* function to make sure all FPA buffers are out of the packet
* IO hardware.
*
* @param pool Pool to shutdown
*
* @return 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)
{
int errors = 0;
int count = 0;
int expected_count = cvmx_fpa_pool_info[pool].starting_element_count;
uint64_t base = cvmx_ptr_to_phys(cvmx_fpa_pool_info[pool].base);
uint64_t finish = base + cvmx_fpa_pool_info[pool].size * expected_count;
count = 0;
while (1)
{
uint64_t address;
void *ptr = cvmx_fpa_alloc(pool);
if (!ptr)
break;
address = cvmx_ptr_to_phys(ptr);
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++;
}
}
if (count < expected_count)
{
cvmx_dprintf("ERROR: cvmx_fpa_shutdown_pool: Pool %s(%d) missing %d buffers\n",
cvmx_fpa_pool_info[pool].name, (int)pool, expected_count - count);
}
else if (count > expected_count)
{
cvmx_dprintf("ERROR: cvmx_fpa_shutdown_pool: Pool %s(%d) had %d duplicate buffers\n",
cvmx_fpa_pool_info[pool].name, (int)pool, count - expected_count);
}
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%x\n",
cvmx_fpa_pool_info[pool].name, (int)pool, (unsigned long long)base, (unsigned long long)finish, (int)cvmx_fpa_pool_info[pool].size);
return -errors;
}
else
return expected_count - count;
}
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;
}
}
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