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/**
* @file
*
* Interface to the hardware Packet Output unit.
*
* Starting with SDK 1.7.0, the PKO output functions now support
* two types of locking. CVMX_PKO_LOCK_ATOMIC_TAG continues to
* function similarly to previous SDKs by using POW atomic tags
* to preserve ordering and exclusivity. As a new option, you
* can now pass CVMX_PKO_LOCK_CMD_QUEUE which uses a ll/sc
* memory based locking instead. This locking has the advantage
* of not affecting the tag state but doesn't preserve packet
* ordering. CVMX_PKO_LOCK_CMD_QUEUE is appropriate in most
* generic code while CVMX_PKO_LOCK_CMD_QUEUE should be used
* with hand tuned fast path code.
*
* Some of other SDK differences visible to the command command
* queuing:
* - PKO indexes are no longer stored in the FAU. A large
* percentage of the FAU register block used to be tied up
* maintaining PKO queue pointers. These are now stored in a
* global named block.
* - The PKO <b>use_locking</b> parameter can now have a global
* effect. Since all application use the same named block,
* queue locking correctly applies across all operating
* systems when using CVMX_PKO_LOCK_CMD_QUEUE.
* - PKO 3 word commands are now supported. Use
* cvmx_pko_send_packet_finish3().
*
* <hr>$Revision: 49448 $<hr>
*/
#ifndef __CVMX_PKO_H__
#define __CVMX_PKO_H__
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
#include "cvmx-config.h"
#include "cvmx-pko-defs.h"
#else
# ifndef CVMX_DONT_INCLUDE_CONFIG
# include "executive-config.h"
# ifdef CVMX_ENABLE_PKO_FUNCTIONS
# include "cvmx-config.h"
# endif
# endif
#endif
#include "cvmx-fau.h"
#include "cvmx-fpa.h"
#include "cvmx-pow.h"
#include "cvmx-cmd-queue.h"
/* Adjust the command buffer size by 1 word so that in the case of using only
** two word PKO commands no command words stradle buffers. The useful values
** for this are 0 and 1. */
#define CVMX_PKO_COMMAND_BUFFER_SIZE_ADJUST (1)
#ifdef __cplusplus
extern "C" {
#endif
#define CVMX_PKO_MAX_OUTPUT_QUEUES_STATIC 256
#define CVMX_PKO_MAX_OUTPUT_QUEUES ((OCTEON_IS_MODEL(OCTEON_CN31XX) || OCTEON_IS_MODEL(OCTEON_CN3010) || OCTEON_IS_MODEL(OCTEON_CN3005) || OCTEON_IS_MODEL(OCTEON_CN50XX)) ? 32 : (OCTEON_IS_MODEL(OCTEON_CN58XX) || OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN52XX) || OCTEON_IS_MODEL(OCTEON_CN63XX)) ? 256 : 128)
#define CVMX_PKO_NUM_OUTPUT_PORTS ((OCTEON_IS_MODEL(OCTEON_CN63XX)) ? 44 : 40)
#define CVMX_PKO_MEM_QUEUE_PTRS_ILLEGAL_PID 63 /* use this for queues that are not used */
#define CVMX_PKO_QUEUE_STATIC_PRIORITY 9
#define CVMX_PKO_ILLEGAL_QUEUE 0xFFFF
#define CVMX_PKO_MAX_QUEUE_DEPTH 0
typedef enum
{
CVMX_PKO_SUCCESS,
CVMX_PKO_INVALID_PORT,
CVMX_PKO_INVALID_QUEUE,
CVMX_PKO_INVALID_PRIORITY,
CVMX_PKO_NO_MEMORY,
CVMX_PKO_PORT_ALREADY_SETUP,
CVMX_PKO_CMD_QUEUE_INIT_ERROR
} cvmx_pko_status_t;
/**
* This enumeration represents the differnet locking modes supported by PKO.
*/
typedef enum
{
CVMX_PKO_LOCK_NONE = 0, /**< PKO doesn't do any locking. It is the responsibility
of the application to make sure that no other core is
accessing the same queue at the smae time */
CVMX_PKO_LOCK_ATOMIC_TAG = 1, /**< PKO performs an atomic tagswitch to insure exclusive
access to the output queue. This will maintain
packet ordering on output */
CVMX_PKO_LOCK_CMD_QUEUE = 2, /**< PKO uses the common command queue locks to insure
exclusive access to the output queue. This is a memory
based ll/sc. This is the most portable locking
mechanism */
} cvmx_pko_lock_t;
typedef struct
{
uint32_t packets;
uint64_t octets;
uint64_t doorbell;
} cvmx_pko_port_status_t;
/**
* This structure defines the address to use on a packet enqueue
*/
typedef union
{
uint64_t u64;
struct
{
cvmx_mips_space_t mem_space : 2; /**< Must CVMX_IO_SEG */
uint64_t reserved :13; /**< Must be zero */
uint64_t is_io : 1; /**< Must be one */
uint64_t did : 8; /**< The ID of the device on the non-coherent bus */
uint64_t reserved2 : 4; /**< Must be zero */
uint64_t reserved3 :18; /**< Must be zero */
uint64_t port : 6; /**< The hardware likes to have the output port in addition to the output queue */
uint64_t queue : 9; /**< The output queue to send the packet to (0-127 are legal) */
uint64_t reserved4 : 3; /**< Must be zero */
} s;
} cvmx_pko_doorbell_address_t;
/**
* Structure of the first packet output command word.
*/
typedef union
{
uint64_t u64;
struct
{
cvmx_fau_op_size_t size1 : 2; /**< The size of the reg1 operation - could be 8, 16, 32, or 64 bits */
cvmx_fau_op_size_t size0 : 2; /**< The size of the reg0 operation - could be 8, 16, 32, or 64 bits */
uint64_t subone1 : 1; /**< If set, subtract 1, if clear, subtract packet size */
uint64_t reg1 :11; /**< The register, subtract will be done if reg1 is non-zero */
uint64_t subone0 : 1; /**< If set, subtract 1, if clear, subtract packet size */
uint64_t reg0 :11; /**< The register, subtract will be done if reg0 is non-zero */
uint64_t le : 1; /**< When set, interpret segment pointer and segment bytes in little endian order */
uint64_t n2 : 1; /**< When set, packet data not allocated in L2 cache by PKO */
uint64_t wqp : 1; /**< If set and rsp is set, word3 contains a pointer to a work queue entry */
uint64_t rsp : 1; /**< If set, the hardware will send a response when done */
uint64_t gather : 1; /**< If set, the supplied pkt_ptr is really a pointer to a list of pkt_ptr's */
uint64_t ipoffp1 : 7; /**< If ipoffp1 is non zero, (ipoffp1-1) is the number of bytes to IP header,
and the hardware will calculate and insert the UDP/TCP checksum */
uint64_t ignore_i : 1; /**< If set, ignore the I bit (force to zero) from all pointer structures */
uint64_t dontfree : 1; /**< If clear, the hardware will attempt to free the buffers containing the packet */
uint64_t segs : 6; /**< The total number of segs in the packet, if gather set, also gather list length */
uint64_t total_bytes :16; /**< Including L2, but no trailing CRC */
} s;
} cvmx_pko_command_word0_t;
/* CSR typedefs have been moved to cvmx-pko-defs.h */
/**
* Definition of internal state for Packet output processing
*/
typedef struct
{
uint64_t * start_ptr; /**< ptr to start of buffer, offset kept in FAU reg */
} cvmx_pko_state_elem_t;
#ifdef CVMX_ENABLE_PKO_FUNCTIONS
/**
* Call before any other calls to initialize the packet
* output system.
*/
extern void cvmx_pko_initialize_global(void);
extern int cvmx_pko_initialize_local(void);
#endif
/**
* Enables the packet output hardware. It must already be
* configured.
*/
extern void cvmx_pko_enable(void);
/**
* Disables the packet output. Does not affect any configuration.
*/
extern void cvmx_pko_disable(void);
/**
* Shutdown and free resources required by packet output.
*/
#ifdef CVMX_ENABLE_PKO_FUNCTIONS
extern void cvmx_pko_shutdown(void);
#endif
/**
* Configure a output port and the associated queues for use.
*
* @param port Port to configure.
* @param base_queue First queue number to associate with this port.
* @param num_queues Number of queues t oassociate with this port
* @param priority Array of priority levels for each queue. Values are
* allowed to be 1-8. A value of 8 get 8 times the traffic
* of a value of 1. There must be num_queues elements in the
* array.
*/
extern cvmx_pko_status_t cvmx_pko_config_port(uint64_t port, uint64_t base_queue, uint64_t num_queues, const uint64_t priority[]);
/**
* Ring the packet output doorbell. This tells the packet
* output hardware that "len" command words have been added
* to its pending list. This command includes the required
* CVMX_SYNCWS before the doorbell ring.
*
* @param port Port the packet is for
* @param queue Queue the packet is for
* @param len Length of the command in 64 bit words
*/
static inline void cvmx_pko_doorbell(uint64_t port, uint64_t queue, uint64_t len)
{
cvmx_pko_doorbell_address_t ptr;
ptr.u64 = 0;
ptr.s.mem_space = CVMX_IO_SEG;
ptr.s.did = CVMX_OCT_DID_PKT_SEND;
ptr.s.is_io = 1;
ptr.s.port = port;
ptr.s.queue = queue;
CVMX_SYNCWS; /* Need to make sure output queue data is in DRAM before doorbell write */
cvmx_write_io(ptr.u64, len);
}
/**
* Prepare to send a packet. This may initiate a tag switch to
* get exclusive access to the output queue structure, and
* performs other prep work for the packet send operation.
*
* cvmx_pko_send_packet_finish() MUST be called after this function is called,
* and must be called with the same port/queue/use_locking arguments.
*
* The use_locking parameter allows the caller to use three
* possible locking modes.
* - CVMX_PKO_LOCK_NONE
* - PKO doesn't do any locking. It is the responsibility
* of the application to make sure that no other core
* is accessing the same queue at the smae time.
* - CVMX_PKO_LOCK_ATOMIC_TAG
* - PKO performs an atomic tagswitch to insure exclusive
* access to the output queue. This will maintain
* packet ordering on output.
* - CVMX_PKO_LOCK_CMD_QUEUE
* - PKO uses the common command queue locks to insure
* exclusive access to the output queue. This is a
* memory based ll/sc. This is the most portable
* locking mechanism.
*
* NOTE: If atomic locking is used, the POW entry CANNOT be
* descheduled, as it does not contain a valid WQE pointer.
*
* @param port Port to send it on
* @param queue Queue to use
* @param use_locking
* CVMX_PKO_LOCK_NONE, CVMX_PKO_LOCK_ATOMIC_TAG, or CVMX_PKO_LOCK_CMD_QUEUE
*/
#ifdef CVMX_ENABLE_PKO_FUNCTIONS
static inline void cvmx_pko_send_packet_prepare(uint64_t port, uint64_t queue, cvmx_pko_lock_t use_locking)
{
if (use_locking == CVMX_PKO_LOCK_ATOMIC_TAG)
{
/* Must do a full switch here to handle all cases. We use a fake WQE pointer, as the POW does
** not access this memory. The WQE pointer and group are only used if this work is descheduled,
** which is not supported by the cvmx_pko_send_packet_prepare/cvmx_pko_send_packet_finish combination.
** Note that this is a special case in which these fake values can be used - this is not a general technique.
*/
uint32_t tag = CVMX_TAG_SW_BITS_INTERNAL << CVMX_TAG_SW_SHIFT | CVMX_TAG_SUBGROUP_PKO << CVMX_TAG_SUBGROUP_SHIFT | (CVMX_TAG_SUBGROUP_MASK & queue);
cvmx_pow_tag_sw_full((cvmx_wqe_t *)cvmx_phys_to_ptr(0x80), tag, CVMX_POW_TAG_TYPE_ATOMIC, 0);
}
}
/**
* Complete packet output. cvmx_pko_send_packet_prepare() must be called exactly once before this,
* and the same parameters must be passed to both cvmx_pko_send_packet_prepare() and
* cvmx_pko_send_packet_finish().
*
* @param port Port to send it on
* @param queue Queue to use
* @param pko_command
* PKO HW command word
* @param packet Packet to send
* @param use_locking
* CVMX_PKO_LOCK_NONE, CVMX_PKO_LOCK_ATOMIC_TAG, or CVMX_PKO_LOCK_CMD_QUEUE
*
* @return returns CVMX_PKO_SUCCESS on success, or error code on failure of output
*/
static inline cvmx_pko_status_t cvmx_pko_send_packet_finish(uint64_t port, uint64_t queue,
cvmx_pko_command_word0_t pko_command,
cvmx_buf_ptr_t packet, cvmx_pko_lock_t use_locking)
{
cvmx_cmd_queue_result_t result;
if (use_locking == CVMX_PKO_LOCK_ATOMIC_TAG)
cvmx_pow_tag_sw_wait();
result = cvmx_cmd_queue_write2(CVMX_CMD_QUEUE_PKO(queue),
(use_locking == CVMX_PKO_LOCK_CMD_QUEUE),
pko_command.u64,
packet.u64);
if (cvmx_likely(result == CVMX_CMD_QUEUE_SUCCESS))
{
cvmx_pko_doorbell(port, queue, 2);
return CVMX_PKO_SUCCESS;
}
else if ((result == CVMX_CMD_QUEUE_NO_MEMORY) || (result == CVMX_CMD_QUEUE_FULL))
{
return CVMX_PKO_NO_MEMORY;
}
else
{
return CVMX_PKO_INVALID_QUEUE;
}
}
/**
* Complete packet output. cvmx_pko_send_packet_prepare() must be called exactly once before this,
* and the same parameters must be passed to both cvmx_pko_send_packet_prepare() and
* cvmx_pko_send_packet_finish().
*
* @param port Port to send it on
* @param queue Queue to use
* @param pko_command
* PKO HW command word
* @param packet Packet to send
* @param addr Plysical address of a work queue entry or physical address to zero on complete.
* @param use_locking
* CVMX_PKO_LOCK_NONE, CVMX_PKO_LOCK_ATOMIC_TAG, or CVMX_PKO_LOCK_CMD_QUEUE
*
* @return returns CVMX_PKO_SUCCESS on success, or error code on failure of output
*/
static inline cvmx_pko_status_t cvmx_pko_send_packet_finish3(uint64_t port, uint64_t queue,
cvmx_pko_command_word0_t pko_command,
cvmx_buf_ptr_t packet, uint64_t addr, cvmx_pko_lock_t use_locking)
{
cvmx_cmd_queue_result_t result;
if (use_locking == CVMX_PKO_LOCK_ATOMIC_TAG)
cvmx_pow_tag_sw_wait();
result = cvmx_cmd_queue_write3(CVMX_CMD_QUEUE_PKO(queue),
(use_locking == CVMX_PKO_LOCK_CMD_QUEUE),
pko_command.u64,
packet.u64,
addr);
if (cvmx_likely(result == CVMX_CMD_QUEUE_SUCCESS))
{
cvmx_pko_doorbell(port, queue, 3);
return CVMX_PKO_SUCCESS;
}
else if ((result == CVMX_CMD_QUEUE_NO_MEMORY) || (result == CVMX_CMD_QUEUE_FULL))
{
return CVMX_PKO_NO_MEMORY;
}
else
{
return CVMX_PKO_INVALID_QUEUE;
}
}
/**
* Return the pko output queue associated with a port and a specific core.
* In normal mode (PKO lockless operation is disabled), the value returned
* is the base queue.
*
* @param port Port number
* @param core Core to get queue for
*
* @return Core-specific output queue
*/
static inline int cvmx_pko_get_base_queue_per_core(int port, int core)
{
#ifndef CVMX_HELPER_PKO_MAX_PORTS_INTERFACE0
#define CVMX_HELPER_PKO_MAX_PORTS_INTERFACE0 16
#endif
#ifndef CVMX_HELPER_PKO_MAX_PORTS_INTERFACE1
#define CVMX_HELPER_PKO_MAX_PORTS_INTERFACE1 16
#endif
#ifndef CVMX_PKO_QUEUES_PER_PORT_SRIO0
/* We use two queues per port for SRIO0. Having two queues per
port with two ports gives us four queues, one for each mailbox */
#define CVMX_PKO_QUEUES_PER_PORT_SRIO0 2
#endif
#ifndef CVMX_PKO_QUEUES_PER_PORT_SRIO1
/* We use two queues per port for SRIO1. Having two queues per
port with two ports gives us four queues, one for each mailbox */
#define CVMX_PKO_QUEUES_PER_PORT_SRIO1 2
#endif
if (port < CVMX_PKO_MAX_PORTS_INTERFACE0)
return port * CVMX_PKO_QUEUES_PER_PORT_INTERFACE0 + core;
else if (port >=16 && port < 16 + CVMX_PKO_MAX_PORTS_INTERFACE1)
return CVMX_PKO_MAX_PORTS_INTERFACE0 * CVMX_PKO_QUEUES_PER_PORT_INTERFACE0 +
(port-16) * CVMX_PKO_QUEUES_PER_PORT_INTERFACE1 + core;
else if ((port >= 32) && (port < 36))
return CVMX_PKO_MAX_PORTS_INTERFACE0 * CVMX_PKO_QUEUES_PER_PORT_INTERFACE0 +
CVMX_PKO_MAX_PORTS_INTERFACE1 * CVMX_PKO_QUEUES_PER_PORT_INTERFACE1 +
(port-32) * CVMX_PKO_QUEUES_PER_PORT_PCI;
else if ((port >= 36) && (port < 40))
return CVMX_PKO_MAX_PORTS_INTERFACE0 * CVMX_PKO_QUEUES_PER_PORT_INTERFACE0 +
CVMX_PKO_MAX_PORTS_INTERFACE1 * CVMX_PKO_QUEUES_PER_PORT_INTERFACE1 +
4 * CVMX_PKO_QUEUES_PER_PORT_PCI +
(port-36) * CVMX_PKO_QUEUES_PER_PORT_LOOP;
else if ((port >= 40) && (port < 42))
return CVMX_PKO_MAX_PORTS_INTERFACE0 * CVMX_PKO_QUEUES_PER_PORT_INTERFACE0 +
CVMX_PKO_MAX_PORTS_INTERFACE1 * CVMX_PKO_QUEUES_PER_PORT_INTERFACE1 +
4 * CVMX_PKO_QUEUES_PER_PORT_PCI +
4 * CVMX_PKO_QUEUES_PER_PORT_LOOP +
(port-40) * CVMX_PKO_QUEUES_PER_PORT_SRIO0;
else if ((port >= 42) && (port < 44))
return CVMX_PKO_MAX_PORTS_INTERFACE0 * CVMX_PKO_QUEUES_PER_PORT_INTERFACE0 +
CVMX_PKO_MAX_PORTS_INTERFACE1 * CVMX_PKO_QUEUES_PER_PORT_INTERFACE1 +
4 * CVMX_PKO_QUEUES_PER_PORT_PCI +
4 * CVMX_PKO_QUEUES_PER_PORT_LOOP +
2 * CVMX_PKO_QUEUES_PER_PORT_SRIO0 +
(port-42) * CVMX_PKO_QUEUES_PER_PORT_SRIO1;
else
/* Given the limit on the number of ports we can map to
* CVMX_MAX_OUTPUT_QUEUES_STATIC queues (currently 256,
* divided among all cores), the remaining unmapped ports
* are assigned an illegal queue number */
return CVMX_PKO_ILLEGAL_QUEUE;
}
/**
* For a given port number, return the base pko output queue
* for the port.
*
* @param port Port number
* @return Base output queue
*/
static inline int cvmx_pko_get_base_queue(int port)
{
return cvmx_pko_get_base_queue_per_core(port, 0);
}
/**
* For a given port number, return the number of pko output queues.
*
* @param port Port number
* @return Number of output queues
*/
static inline int cvmx_pko_get_num_queues(int port)
{
if (port < 16)
return CVMX_PKO_QUEUES_PER_PORT_INTERFACE0;
else if (port<32)
return CVMX_PKO_QUEUES_PER_PORT_INTERFACE1;
else if (port<36)
return CVMX_PKO_QUEUES_PER_PORT_PCI;
else if (port<40)
return CVMX_PKO_QUEUES_PER_PORT_LOOP;
else if (port<42)
return CVMX_PKO_QUEUES_PER_PORT_SRIO0;
else if (port<44)
return CVMX_PKO_QUEUES_PER_PORT_SRIO1;
else
return 0;
}
/**
* Get the status counters for a port.
*
* @param port_num Port number to get statistics for.
* @param clear Set to 1 to clear the counters after they are read
* @param status Where to put the results.
*/
static inline void cvmx_pko_get_port_status(uint64_t port_num, uint64_t clear, cvmx_pko_port_status_t *status)
{
cvmx_pko_reg_read_idx_t pko_reg_read_idx;
cvmx_pko_mem_count0_t pko_mem_count0;
cvmx_pko_mem_count1_t pko_mem_count1;
pko_reg_read_idx.u64 = 0;
pko_reg_read_idx.s.index = port_num;
cvmx_write_csr(CVMX_PKO_REG_READ_IDX, pko_reg_read_idx.u64);
pko_mem_count0.u64 = cvmx_read_csr(CVMX_PKO_MEM_COUNT0);
status->packets = pko_mem_count0.s.count;
if (clear)
{
pko_mem_count0.s.count = port_num;
cvmx_write_csr(CVMX_PKO_MEM_COUNT0, pko_mem_count0.u64);
}
pko_mem_count1.u64 = cvmx_read_csr(CVMX_PKO_MEM_COUNT1);
status->octets = pko_mem_count1.s.count;
if (clear)
{
pko_mem_count1.s.count = port_num;
cvmx_write_csr(CVMX_PKO_MEM_COUNT1, pko_mem_count1.u64);
}
if (OCTEON_IS_MODEL(OCTEON_CN3XXX))
{
cvmx_pko_mem_debug9_t debug9;
pko_reg_read_idx.s.index = cvmx_pko_get_base_queue(port_num);
cvmx_write_csr(CVMX_PKO_REG_READ_IDX, pko_reg_read_idx.u64);
debug9.u64 = cvmx_read_csr(CVMX_PKO_MEM_DEBUG9);
status->doorbell = debug9.cn38xx.doorbell;
}
else
{
cvmx_pko_mem_debug8_t debug8;
pko_reg_read_idx.s.index = cvmx_pko_get_base_queue(port_num);
cvmx_write_csr(CVMX_PKO_REG_READ_IDX, pko_reg_read_idx.u64);
debug8.u64 = cvmx_read_csr(CVMX_PKO_MEM_DEBUG8);
status->doorbell = debug8.cn58xx.doorbell;
}
}
/**
* Rate limit a PKO port to a max packets/sec. This function is only
* supported on CN57XX, CN56XX, CN55XX, and CN54XX.
*
* @param port Port to rate limit
* @param packets_s Maximum packet/sec
* @param burst Maximum number of packets to burst in a row before rate
* limiting cuts in.
*
* @return Zero on success, negative on failure
*/
extern int cvmx_pko_rate_limit_packets(int port, int packets_s, int burst);
/**
* Rate limit a PKO port to a max bits/sec. This function is only
* supported on CN57XX, CN56XX, CN55XX, and CN54XX.
*
* @param port Port to rate limit
* @param bits_s PKO rate limit in bits/sec
* @param burst Maximum number of bits to burst before rate
* limiting cuts in.
*
* @return Zero on success, negative on failure
*/
extern int cvmx_pko_rate_limit_bits(int port, uint64_t bits_s, int burst);
#endif /* CVMX_ENABLE_PKO_FUNCTIONS */
#ifdef __cplusplus
}
#endif
#endif /* __CVMX_PKO_H__ */