| /********************************************************************** |
| * Author: Cavium, Inc. |
| * |
| * Contact: support@cavium.com |
| * Please include "LiquidIO" in the subject. |
| * |
| * Copyright (c) 2003-2015 Cavium, Inc. |
| * |
| * 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. |
| * |
| * This file may also be available under a different license from Cavium. |
| * Contact Cavium, Inc. for more information |
| **********************************************************************/ |
| |
| /*! \file response_manager.h |
| * \brief Host Driver: Response queues for host instructions. |
| */ |
| |
| #ifndef __RESPONSE_MANAGER_H__ |
| #define __RESPONSE_MANAGER_H__ |
| |
| /** Maximum ordered requests to process in every invocation of |
| * lio_process_ordered_list(). The function will continue to process requests |
| * as long as it can find one that has finished processing. If it keeps |
| * finding requests that have completed, the function can run for ever. The |
| * value defined here sets an upper limit on the number of requests it can |
| * process before it returns control to the poll thread. |
| */ |
| #define MAX_ORD_REQS_TO_PROCESS 4096 |
| |
| /** Head of a response list. There are several response lists in the |
| * system. One for each response order- Unordered, ordered |
| * and 1 for noresponse entries on each instruction queue. |
| */ |
| struct octeon_response_list { |
| /** List structure to add delete pending entries to */ |
| struct list_head head; |
| |
| /** A lock for this response list */ |
| spinlock_t lock; |
| |
| atomic_t pending_req_count; |
| }; |
| |
| /** The type of response list. |
| */ |
| enum { |
| OCTEON_ORDERED_LIST = 0, |
| OCTEON_UNORDERED_NONBLOCKING_LIST = 1, |
| OCTEON_UNORDERED_BLOCKING_LIST = 2, |
| OCTEON_ORDERED_SC_LIST = 3 |
| }; |
| |
| /** Response Order values for a Octeon Request. */ |
| enum { |
| OCTEON_RESP_ORDERED = 0, |
| OCTEON_RESP_UNORDERED = 1, |
| OCTEON_RESP_NORESPONSE = 2 |
| }; |
| |
| /** Error codes used in Octeon Host-Core communication. |
| * |
| * 31 16 15 0 |
| * --------------------------------- |
| * | | | |
| * --------------------------------- |
| * Error codes are 32-bit wide. The upper 16-bits, called Major Error Number, |
| * are reserved to identify the group to which the error code belongs. The |
| * lower 16-bits, called Minor Error Number, carry the actual code. |
| * |
| * So error codes are (MAJOR NUMBER << 16)| MINOR_NUMBER. |
| */ |
| |
| /*------------ Error codes used by host driver -----------------*/ |
| #define DRIVER_MAJOR_ERROR_CODE 0x0000 |
| |
| /** A value of 0x00000000 indicates no error i.e. success */ |
| #define DRIVER_ERROR_NONE 0x00000000 |
| |
| /** (Major number: 0x0000; Minor Number: 0x0001) */ |
| #define DRIVER_ERROR_REQ_PENDING 0x00000001 |
| #define DRIVER_ERROR_REQ_TIMEOUT 0x00000003 |
| #define DRIVER_ERROR_REQ_EINTR 0x00000004 |
| #define DRIVER_ERROR_REQ_ENXIO 0x00000006 |
| #define DRIVER_ERROR_REQ_ENOMEM 0x0000000C |
| #define DRIVER_ERROR_REQ_EINVAL 0x00000016 |
| #define DRIVER_ERROR_REQ_FAILED 0x000000ff |
| |
| /** Status for a request. |
| * If a request is not queued to Octeon by the driver, the driver returns |
| * an error condition that's describe by one of the OCTEON_REQ_ERR_* value |
| * below. If the request is successfully queued, the driver will return |
| * a OCTEON_REQUEST_PENDING status. OCTEON_REQUEST_TIMEOUT and |
| * OCTEON_REQUEST_INTERRUPTED are only returned by the driver if the |
| * response for request failed to arrive before a time-out period or if |
| * the request processing * got interrupted due to a signal respectively. |
| */ |
| enum { |
| OCTEON_REQUEST_DONE = (DRIVER_ERROR_NONE), |
| OCTEON_REQUEST_PENDING = (DRIVER_ERROR_REQ_PENDING), |
| OCTEON_REQUEST_TIMEOUT = (DRIVER_ERROR_REQ_TIMEOUT), |
| OCTEON_REQUEST_INTERRUPTED = (DRIVER_ERROR_REQ_EINTR), |
| OCTEON_REQUEST_NO_DEVICE = (0x00000021), |
| OCTEON_REQUEST_NOT_RUNNING, |
| OCTEON_REQUEST_INVALID_IQ, |
| OCTEON_REQUEST_INVALID_BUFCNT, |
| OCTEON_REQUEST_INVALID_RESP_ORDER, |
| OCTEON_REQUEST_NO_MEMORY, |
| OCTEON_REQUEST_INVALID_BUFSIZE, |
| OCTEON_REQUEST_NO_PENDING_ENTRY, |
| OCTEON_REQUEST_NO_IQ_SPACE = (0x7FFFFFFF) |
| |
| }; |
| |
| /** Initialize the response lists. The number of response lists to create is |
| * given by count. |
| * @param octeon_dev - the octeon device structure. |
| */ |
| int octeon_setup_response_list(struct octeon_device *octeon_dev); |
| |
| void octeon_delete_response_list(struct octeon_device *octeon_dev); |
| |
| /** Check the status of first entry in the ordered list. If the instruction at |
| * that entry finished processing or has timed-out, the entry is cleaned. |
| * @param octeon_dev - the octeon device structure. |
| * @param force_quit - the request is forced to timeout if this is 1 |
| * @return 1 if the ordered list is empty, 0 otherwise. |
| */ |
| int lio_process_ordered_list(struct octeon_device *octeon_dev, |
| u32 force_quit); |
| |
| #endif |
