/***********************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 <linux/delay.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 */
__delay(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);
}
/**
* 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__ */