af866496c7
Signed-off-by: David Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Cc: netdev@vger.kernel.org Cc: devel@driverdev.osuosl.org Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Patchwork: https://patchwork.linux-mips.org/patch/2942/ Patchwork: https://patchwork.linux-mips.org/patch/3012/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
215 lines
6 KiB
C
215 lines
6 KiB
C
/***********************license start***************
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* Author: Cavium Networks
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*
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* Contact: support@caviumnetworks.com
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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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* Debug routine to dump the packet structure to the console
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*
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* @work: Work queue entry containing the packet to dump
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* Returns
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*/
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extern int cvmx_helper_dump_packet(cvmx_wqe_t *work);
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/**
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* Setup Random Early Drop on a specific input queue
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*
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* @queue: Input queue to setup RED on (0-7)
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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 incomming 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_queue(int queue, int pass_thresh,
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int drop_thresh);
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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 incomming 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(cvmx_wqe_t *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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