/*
* Copyright (c) 2003-2012 Broadcom Corporation
* All Rights Reserved
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the Broadcom
* license below:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY BROADCOM ``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 BROADCOM OR CONTRIBUTORS 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.
*/
#include <asm/cpu-info.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <asm/mipsregs.h>
#include <asm/netlogic/xlr/fmn.h>
#include <asm/netlogic/xlr/xlr.h>
#include <asm/netlogic/common.h>
#include <asm/netlogic/haldefs.h>
struct xlr_board_fmn_config xlr_board_fmn_config;
static void __maybe_unused print_credit_config(struct xlr_fmn_info *fmn_info)
{
int bkt;
pr_info("Bucket size :\n");
pr_info("Station\t: Size\n");
for (bkt = 0; bkt < 16; bkt++)
pr_info(" %d %d %d %d %d %d %d %d\n",
xlr_board_fmn_config.bucket_size[(bkt * 8) + 0],
xlr_board_fmn_config.bucket_size[(bkt * 8) + 1],
xlr_board_fmn_config.bucket_size[(bkt * 8) + 2],
xlr_board_fmn_config.bucket_size[(bkt * 8) + 3],
xlr_board_fmn_config.bucket_size[(bkt * 8) + 4],
xlr_board_fmn_config.bucket_size[(bkt * 8) + 5],
xlr_board_fmn_config.bucket_size[(bkt * 8) + 6],
xlr_board_fmn_config.bucket_size[(bkt * 8) + 7]);
pr_info("\n");
pr_info("Credits distribution :\n");
pr_info("Station\t: Size\n");
for (bkt = 0; bkt < 16; bkt++)
pr_info(" %d %d %d %d %d %d %d %d\n",
fmn_info->credit_config[(bkt * 8) + 0],
fmn_info->credit_config[(bkt * 8) + 1],
fmn_info->credit_config[(bkt * 8) + 2],
fmn_info->credit_config[(bkt * 8) + 3],
fmn_info->credit_config[(bkt * 8) + 4],
fmn_info->credit_config[(bkt * 8) + 5],
fmn_info->credit_config[(bkt * 8) + 6],
fmn_info->credit_config[(bkt * 8) + 7]);
pr_info("\n");
}
static void check_credit_distribution(void)
{
struct xlr_board_fmn_config *cfg = &xlr_board_fmn_config;
int bkt, n, total_credits, ncores;
ncores = hweight32(nlm_current_node()->coremask);
for (bkt = 0; bkt < 128; bkt++) {
total_credits = 0;
for (n = 0; n < ncores; n++)
total_credits += cfg->cpu[n].credit_config[bkt];
total_credits += cfg->gmac[0].credit_config[bkt];
total_credits += cfg->gmac[1].credit_config[bkt];
total_credits += cfg->dma.credit_config[bkt];
total_credits += cfg->cmp.credit_config[bkt];
total_credits += cfg->sae.credit_config[bkt];
total_credits += cfg->xgmac[0].credit_config[bkt];
total_credits += cfg->xgmac[1].credit_config[bkt];
if (total_credits > cfg->bucket_size[bkt])
pr_err("ERROR: Bucket %d: credits (%d) > size (%d)\n",
bkt, total_credits, cfg->bucket_size[bkt]);
}
pr_info("Credit distribution complete.\n");
}
/**
* Configure bucket size and credits for a device. 'size' is the size of
* the buckets for the device. This size is distributed among all the CPUs
* so that all of them can send messages to the device.
*
* The device is also given 'cpu_credits' to send messages to the CPUs
*
* @dev_info: FMN information structure for each devices
* @start_stn_id: Starting station id of dev_info
* @end_stn_id: End station id of dev_info
* @num_buckets: Total number of buckets for den_info
* @cpu_credits: Allowed credits to cpu for each devices pointing by dev_info
* @size: Size of the each buckets in the device station
*/
static void setup_fmn_cc(struct xlr_fmn_info *dev_info, int start_stn_id,
int end_stn_id, int num_buckets, int cpu_credits, int size)
{
int i, j, num_core, n, credits_per_cpu;
struct xlr_fmn_info *cpu = xlr_board_fmn_config.cpu;
num_core = hweight32(nlm_current_node()->coremask);
dev_info->num_buckets = num_buckets;
dev_info->start_stn_id = start_stn_id;
dev_info->end_stn_id = end_stn_id;
n = num_core;
if (num_core == 3)
n = 4;
for (i = start_stn_id; i <= end_stn_id; i++) {
xlr_board_fmn_config.bucket_size[i] = size;
/* Dividing device credits equally to cpus */
credits_per_cpu = size / n;
for (j = 0; j < num_core; j++)
cpu[j].credit_config[i] = credits_per_cpu;
/* credits left to distribute */
credits_per_cpu = size - (credits_per_cpu * num_core);
/* distribute the remaining credits (if any), among cores */
for (j = 0; (j < num_core) && (credits_per_cpu >= 4); j++) {
cpu[j].credit_config[i] += 4;
credits_per_cpu -= 4;
}
}
/* Distributing cpu per bucket credits to devices */
for (i = 0; i < num_core; i++) {
for (j = 0; j < FMN_CORE_NBUCKETS; j++)
dev_info->credit_config[(i * 8) + j] = cpu_credits;
}
}
/*
* Each core has 256 slots and 8 buckets,
* Configure the 8 buckets each with 32 slots
*/
static void setup_cpu_fmninfo(struct xlr_fmn_info *cpu, int num_core)
{
int i, j;
for (i = 0; i < num_core; i++) {
cpu[i].start_stn_id = (8 * i);
cpu[i].end_stn_id = (8 * i + 8);
for (j = cpu[i].start_stn_id; j < cpu[i].end_stn_id; j++)
xlr_board_fmn_config.bucket_size[j] = 32;
}
}
/**
* Setup the FMN details for each devices according to the device available
* in each variant of XLR/XLS processor
*/
void xlr_board_info_setup(void)
{
struct xlr_fmn_info *cpu = xlr_board_fmn_config.cpu;
struct xlr_fmn_info *gmac = xlr_board_fmn_config.gmac;
struct xlr_fmn_info *xgmac = xlr_board_fmn_config.xgmac;
struct xlr_fmn_info *dma = &xlr_board_fmn_config.dma;
struct xlr_fmn_info *cmp = &xlr_board_fmn_config.cmp;
struct xlr_fmn_info *sae = &xlr_board_fmn_config.sae;
int processor_id, num_core;
num_core = hweight32(nlm_current_node()->coremask);
processor_id = read_c0_prid() & 0xff00;
setup_cpu_fmninfo(cpu, num_core);
switch (processor_id) {
case PRID_IMP_NETLOGIC_XLS104:
case PRID_IMP_NETLOGIC_XLS108:
setup_fmn_cc(&gmac[0], FMN_STNID_GMAC0,
FMN_STNID_GMAC0_TX3, 8, 16, 32);
setup_fmn_cc(dma, FMN_STNID_DMA_0,
FMN_STNID_DMA_3, 4, 8, 64);
setup_fmn_cc(sae, FMN_STNID_SEC0,
FMN_STNID_SEC1, 2, 8, 128);
break;
case PRID_IMP_NETLOGIC_XLS204:
case PRID_IMP_NETLOGIC_XLS208:
setup_fmn_cc(&gmac[0], FMN_STNID_GMAC0,
FMN_STNID_GMAC0_TX3, 8, 16, 32);
setup_fmn_cc(dma, FMN_STNID_DMA_0,
FMN_STNID_DMA_3, 4, 8, 64);
setup_fmn_cc(sae, FMN_STNID_SEC0,
FMN_STNID_SEC1, 2, 8, 128);
break;
case PRID_IMP_NETLOGIC_XLS404:
case PRID_IMP_NETLOGIC_XLS408:
case PRID_IMP_NETLOGIC_XLS404B:
case PRID_IMP_NETLOGIC_XLS408B:
case PRID_IMP_NETLOGIC_XLS416B:
case PRID_IMP_NETLOGIC_XLS608B:
case PRID_IMP_NETLOGIC_XLS616B:
setup_fmn_cc(&gmac[0], FMN_STNID_GMAC0,
FMN_STNID_GMAC0_TX3, 8, 8, 32);
setup_fmn_cc(&gmac[1], FMN_STNID_GMAC1_FR_0,
FMN_STNID_GMAC1_TX3, 8, 8, 32);
setup_fmn_cc(dma, FMN_STNID_DMA_0,
FMN_STNID_DMA_3, 4, 4, 64);
setup_fmn_cc(cmp, FMN_STNID_CMP_0,
FMN_STNID_CMP_3, 4, 4, 64);
setup_fmn_cc(sae, FMN_STNID_SEC0,
FMN_STNID_SEC1, 2, 8, 128);
break;
case PRID_IMP_NETLOGIC_XLS412B:
setup_fmn_cc(&gmac[0], FMN_STNID_GMAC0,
FMN_STNID_GMAC0_TX3, 8, 8, 32);
setup_fmn_cc(&gmac[1], FMN_STNID_GMAC1_FR_0,
FMN_STNID_GMAC1_TX3, 8, 8, 32);
setup_fmn_cc(dma, FMN_STNID_DMA_0,
FMN_STNID_DMA_3, 4, 4, 64);
setup_fmn_cc(cmp, FMN_STNID_CMP_0,
FMN_STNID_CMP_3, 4, 4, 64);
setup_fmn_cc(sae, FMN_STNID_SEC0,
FMN_STNID_SEC1, 2, 8, 128);
break;
case PRID_IMP_NETLOGIC_XLR308:
case PRID_IMP_NETLOGIC_XLR308C:
setup_fmn_cc(&gmac[0], FMN_STNID_GMAC0,
FMN_STNID_GMAC0_TX3, 8, 16, 32);
setup_fmn_cc(dma, FMN_STNID_DMA_0,
FMN_STNID_DMA_3, 4, 8, 64);
setup_fmn_cc(sae, FMN_STNID_SEC0,
FMN_STNID_SEC1, 2, 4, 128);
break;
case PRID_IMP_NETLOGIC_XLR532:
case PRID_IMP_NETLOGIC_XLR532C:
case PRID_IMP_NETLOGIC_XLR516C:
case PRID_IMP_NETLOGIC_XLR508C:
setup_fmn_cc(&gmac[0], FMN_STNID_GMAC0,
FMN_STNID_GMAC0_TX3, 8, 16, 32);
setup_fmn_cc(dma, FMN_STNID_DMA_0,
FMN_STNID_DMA_3, 4, 8, 64);
setup_fmn_cc(sae, FMN_STNID_SEC0,
FMN_STNID_SEC1, 2, 4, 128);
break;
case PRID_IMP_NETLOGIC_XLR732:
case PRID_IMP_NETLOGIC_XLR716:
setup_fmn_cc(&xgmac[0], FMN_STNID_XMAC0_00_TX,
FMN_STNID_XMAC0_15_TX, 8, 0, 32);
setup_fmn_cc(&xgmac[1], FMN_STNID_XMAC1_00_TX,
FMN_STNID_XMAC1_15_TX, 8, 0, 32);
setup_fmn_cc(&gmac[0], FMN_STNID_GMAC0,
FMN_STNID_GMAC0_TX3, 8, 24, 32);
setup_fmn_cc(dma, FMN_STNID_DMA_0,
FMN_STNID_DMA_3, 4, 4, 64);
setup_fmn_cc(sae, FMN_STNID_SEC0,
FMN_STNID_SEC1, 2, 4, 128);
break;
default:
pr_err("Unknown CPU with processor ID [%d]\n", processor_id);
pr_err("Error: Cannot initialize FMN credits.\n");
}
check_credit_distribution();
#if 0 /* debug */
print_credit_config(&cpu[0]);
print_credit_config(&gmac[0]);
#endif
}