Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 293 insertions, 0 deletions

diff --git a/kernel/arch/mips/netlogic/xlr/fmn-config.c b/kernel/arch/mips/netlogic/xlr/fmn-config.c
new file mode 100644
index 000000000..c7622c6e5
--- /dev/null
+++ b/kernel/arch/mips/netlogic/xlr/fmn-config.c
@@ -0,0 +1,293 @@
+/*
+ * 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/cpu.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() & PRID_IMP_MASK;
+
+	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
+}