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Diffstat (limited to 'drivers/net/ethernet/freescale/sdk_fman/src/wrapper/lnxwrp_resources.h')
| -rw-r--r-- | drivers/net/ethernet/freescale/sdk_fman/src/wrapper/lnxwrp_resources.h | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/drivers/net/ethernet/freescale/sdk_fman/src/wrapper/lnxwrp_resources.h b/drivers/net/ethernet/freescale/sdk_fman/src/wrapper/lnxwrp_resources.h new file mode 100644 index 0000000..1b72e1d --- /dev/null +++ b/drivers/net/ethernet/freescale/sdk_fman/src/wrapper/lnxwrp_resources.h @@ -0,0 +1,121 @@ +/* + * Copyright 2008-2012 Freescale Semiconductor Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of Freescale Semiconductor nor the + * names of its contributors may be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * + * ALTERNATIVELY, this software may be distributed under the terms of the + * GNU General Public License ("GPL") as published by the Free Software + * Foundation, either version 2 of that License or (at your option) any + * later version. + * + * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/* + @File lnxwrp_resources.h + + @Description FMD wrapper resource allocation functions. + +*/ + +#ifndef LNXWRP_RESOURCES_H_ +#define LNXWRP_RESOURCES_H_ + +#if !defined(FMAN_RESOURCES_UNIT_TEST) +#include "lnxwrp_fm.h" +#else +#include "lnxwrp_resources_ut.h" +#endif + +#define ROUND(X) ((2*(X)+1)/2) +#define CEIL(X) ((X)+1) +/* #define ROUND_DIV(X, Y) (((X)+(Y)/2)/(Y)) */ +#define ROUND_DIV(X, Y) ((2*(X)+(Y))/(2*(Y))) +#define CEIL_DIV(X, Y) (((X)+(Y)-1)/(Y)) + +/* used for resource calculus */ +#define DPDE_1G 2 /* DQDP 1g - from LLD: + DEFAULT_PORT_txFifoDeqPipelineDepth_1G */ +#define DPDE_10G 8 /* DQDP 10g - from LLD: + DEFAULT_PORT_txFifoDeqPipelineDepth_10G */ + +int fm_set_active_fman_ports(struct platform_device *of_dev, + t_LnxWrpFmDev *p_LnxWrpFmDev); + +/* Calculate the fifosize based on MURAM allocation, number of ports, dpde + * value and s/g software support (! Kernel does not suport s/g). + * + * Algorithm summary: + * - Calculate the the minimum fifosize required for every type of port + * (TX,RX for 1G, 2.5G and 10G). + * - Set TX the minimum fifosize required. + * - Distribute the remaining buffers (after all TX were set) to RX ports + * based on: + * 1G RX = Remaining_buffers * 1/(1+2.5+10) + * 2.5G RX = Remaining_buffers * 2.5/(1+2.5+10) + * 10G RX = Remaining_buffers * 10/(1+2.5+10) + * - if the RX is smaller than the minimum required, then set the minimum + * required + * - In the end distribuite the leftovers if there are any (due to + * unprecise calculus) or if over allocation cat some buffers from all RX + * ports w/o pass over minimum required treshold, but if there must be + * pass the treshold in order to cat the over allocation ,then this + * configuration can not be set - KERN_ALERT. +*/ +int fm_precalculate_fifosizes(t_LnxWrpFmDev *p_LnxWrpFmDev, + int muram_fifo_size); + +#if !defined(FMAN_RESOURCES_UNIT_TEST) +int fm_config_precalculate_fifosize(t_LnxWrpFmPortDev *p_LnxWrpFmPortDev); +#endif + +/* Compute FMan open DMA based on total number of open DMAs and + * number of available fman ports. + * + * By default 10g ports are set to input parameters. The other ports + * tries to keep the proportion rx=2tx open dmas or tresholds. + * + * If leftovers, then those will be set as shared. + * + * If after computing overflow appears, then it decrements open dma + * for all ports w/o cross the tresholds. If the tresholds are meet + * and is still overflow, then it returns error. +*/ +int fm_precalculate_open_dma(t_LnxWrpFmDev *p_LnxWrpFmDev, + int max_fm_open_dma, + int default_tx_10g_dmas, + int default_rx_10g_dmas, + int min_tx_10g_treshold, int min_rx_10g_treshold); + +#if !defined(FMAN_RESOURCES_UNIT_TEST) +int fm_config_precalculate_open_dma(t_LnxWrpFmPortDev *p_LnxWrpFmPortDev); +#endif + +/* Compute FMan tnums based on available tnums and number of ports. + * Set defaults (minim tresholds) and then distribute leftovers.*/ +int fm_precalculate_tnums(t_LnxWrpFmDev *p_LnxWrpFmDev, int max_fm_tnums); + +#if !defined(FMAN_RESOURCES_UNIT_TEST) +int fm_config_precalculate_tnums(t_LnxWrpFmPortDev *p_LnxWrpFmPortDev); +#endif + +#endif /* LNXWRP_RESOURCES_H_ */ |