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Diffstat (limited to 'arch/mips/include/asm/octeon/cvmx-fpa.h')
| -rw-r--r-- | arch/mips/include/asm/octeon/cvmx-fpa.h | 308 |
1 files changed, 308 insertions, 0 deletions
diff --git a/arch/mips/include/asm/octeon/cvmx-fpa.h b/arch/mips/include/asm/octeon/cvmx-fpa.h new file mode 100644 index 000000000..29ae63606 --- /dev/null +++ b/arch/mips/include/asm/octeon/cvmx-fpa.h @@ -0,0 +1,308 @@ +/***********************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); +} + +/** + * 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__ */ |