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192 lines
5.2 KiB
192 lines
5.2 KiB
/***********************license start*************** |
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* Author: Cavium Networks |
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* |
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* Contact: [email protected] |
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* This file is part of the OCTEON SDK |
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* |
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* Copyright (c) 2003-2008 Cavium Networks |
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* |
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* This file is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License, Version 2, as |
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* published by the Free Software Foundation. |
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* |
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* This file is distributed in the hope that it will be useful, but |
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* AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty |
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or |
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* NONINFRINGEMENT. See the GNU General Public License for more |
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* details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this file; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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* or visit http://www.gnu.org/licenses/. |
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* |
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* This file may also be available under a different license from Cavium. |
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* Contact Cavium Networks for more information |
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***********************license end**************************************/ |
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/* |
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* |
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* Small helper utilities. |
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* |
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*/ |
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#ifndef __CVMX_HELPER_UTIL_H__ |
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#define __CVMX_HELPER_UTIL_H__ |
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/** |
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* Convert a interface mode into a human readable string |
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* |
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* @mode: Mode to convert |
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* |
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* Returns String |
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*/ |
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extern const char |
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*cvmx_helper_interface_mode_to_string(cvmx_helper_interface_mode_t mode); |
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/** |
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* Setup Random Early Drop to automatically begin dropping packets. |
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* |
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* @pass_thresh: |
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* Packets will begin slowly dropping when there are less than |
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* this many packet buffers free in FPA 0. |
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* @drop_thresh: |
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* All incoming packets will be dropped when there are less |
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* than this many free packet buffers in FPA 0. |
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* Returns Zero on success. Negative on failure |
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*/ |
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extern int cvmx_helper_setup_red(int pass_thresh, int drop_thresh); |
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/** |
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* Get the version of the CVMX libraries. |
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* |
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* Returns Version string. Note this buffer is allocated statically |
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* and will be shared by all callers. |
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*/ |
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extern const char *cvmx_helper_get_version(void); |
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/** |
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* Setup the common GMX settings that determine the number of |
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* ports. These setting apply to almost all configurations of all |
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* chips. |
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* |
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* @interface: Interface to configure |
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* @num_ports: Number of ports on the interface |
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* |
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* Returns Zero on success, negative on failure |
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*/ |
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extern int __cvmx_helper_setup_gmx(int interface, int num_ports); |
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/** |
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* Returns the IPD/PKO port number for a port on the given |
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* interface. |
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* |
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* @interface: Interface to use |
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* @port: Port on the interface |
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* |
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* Returns IPD/PKO port number |
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*/ |
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extern int cvmx_helper_get_ipd_port(int interface, int port); |
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/** |
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* Returns the IPD/PKO port number for the first port on the given |
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* interface. |
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* |
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* @interface: Interface to use |
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* |
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* Returns IPD/PKO port number |
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*/ |
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static inline int cvmx_helper_get_first_ipd_port(int interface) |
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{ |
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return cvmx_helper_get_ipd_port(interface, 0); |
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} |
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/** |
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* Returns the IPD/PKO port number for the last port on the given |
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* interface. |
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* |
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* @interface: Interface to use |
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* |
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* Returns IPD/PKO port number |
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*/ |
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static inline int cvmx_helper_get_last_ipd_port(int interface) |
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{ |
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extern int cvmx_helper_ports_on_interface(int interface); |
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return cvmx_helper_get_first_ipd_port(interface) + |
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cvmx_helper_ports_on_interface(interface) - 1; |
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} |
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/** |
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* Free the packet buffers contained in a work queue entry. |
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* The work queue entry is not freed. |
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* |
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* @work: Work queue entry with packet to free |
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*/ |
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static inline void cvmx_helper_free_packet_data(struct cvmx_wqe *work) |
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{ |
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uint64_t number_buffers; |
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union cvmx_buf_ptr buffer_ptr; |
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union cvmx_buf_ptr next_buffer_ptr; |
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uint64_t start_of_buffer; |
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number_buffers = work->word2.s.bufs; |
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if (number_buffers == 0) |
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return; |
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buffer_ptr = work->packet_ptr; |
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/* |
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* Since the number of buffers is not zero, we know this is |
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* not a dynamic short packet. We need to check if it is a |
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* packet received with IPD_CTL_STATUS[NO_WPTR]. If this is |
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* true, we need to free all buffers except for the first |
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* one. The caller doesn't expect their WQE pointer to be |
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* freed |
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*/ |
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start_of_buffer = ((buffer_ptr.s.addr >> 7) - buffer_ptr.s.back) << 7; |
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if (cvmx_ptr_to_phys(work) == start_of_buffer) { |
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next_buffer_ptr = |
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*(union cvmx_buf_ptr *) cvmx_phys_to_ptr(buffer_ptr.s.addr - 8); |
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buffer_ptr = next_buffer_ptr; |
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number_buffers--; |
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} |
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while (number_buffers--) { |
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/* |
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* Remember the back pointer is in cache lines, not |
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* 64bit words |
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*/ |
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start_of_buffer = |
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((buffer_ptr.s.addr >> 7) - buffer_ptr.s.back) << 7; |
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/* |
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* Read pointer to next buffer before we free the |
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* current buffer. |
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*/ |
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next_buffer_ptr = |
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*(union cvmx_buf_ptr *) cvmx_phys_to_ptr(buffer_ptr.s.addr - 8); |
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cvmx_fpa_free(cvmx_phys_to_ptr(start_of_buffer), |
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buffer_ptr.s.pool, 0); |
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buffer_ptr = next_buffer_ptr; |
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} |
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} |
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/** |
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* Returns the interface number for an IPD/PKO port number. |
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* |
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* @ipd_port: IPD/PKO port number |
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* |
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* Returns Interface number |
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*/ |
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extern int cvmx_helper_get_interface_num(int ipd_port); |
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/** |
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* Returns the interface index number for an IPD/PKO port |
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* number. |
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* |
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* @ipd_port: IPD/PKO port number |
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* |
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* Returns Interface index number |
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*/ |
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extern int cvmx_helper_get_interface_index_num(int ipd_port); |
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#endif /* __CVMX_HELPER_H__ */
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