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, 334 insertions, 0 deletions

diff --git a/kernel/drivers/net/ethernet/chelsio/cxgb3/adapter.h b/kernel/drivers/net/ethernet/chelsio/cxgb3/adapter.h
new file mode 100644
index 000000000..8b395b537
--- /dev/null
+++ b/kernel/drivers/net/ethernet/chelsio/cxgb3/adapter.h
@@ -0,0 +1,334 @@
+/*
+ * Copyright (c) 2003-2008 Chelsio, Inc. 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
+ * OpenIB.org BSD license below:
+ *
+ *     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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+/* This file should not be included directly.  Include common.h instead. */
+
+#ifndef __T3_ADAPTER_H__
+#define __T3_ADAPTER_H__
+
+#include <linux/pci.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/timer.h>
+#include <linux/cache.h>
+#include <linux/mutex.h>
+#include <linux/bitops.h>
+#include "t3cdev.h"
+#include <asm/io.h>
+
+struct adapter;
+struct sge_qset;
+struct port_info;
+
+enum mac_idx_types {
+	LAN_MAC_IDX	= 0,
+	SAN_MAC_IDX,
+
+	MAX_MAC_IDX
+};
+
+struct iscsi_config {
+	__u8	mac_addr[ETH_ALEN];
+	__u32	flags;
+	int (*send)(struct port_info *pi, struct sk_buff **skb);
+	int (*recv)(struct port_info *pi, struct sk_buff *skb);
+};
+
+struct port_info {
+	struct adapter *adapter;
+	struct sge_qset *qs;
+	u8 port_id;
+	u8 nqsets;
+	u8 first_qset;
+	struct cphy phy;
+	struct cmac mac;
+	struct link_config link_config;
+	struct net_device_stats netstats;
+	int activity;
+	__be32 iscsi_ipv4addr;
+	struct iscsi_config iscsic;
+
+	int link_fault; /* link fault was detected */
+};
+
+enum {				/* adapter flags */
+	FULL_INIT_DONE = (1 << 0),
+	USING_MSI = (1 << 1),
+	USING_MSIX = (1 << 2),
+	QUEUES_BOUND = (1 << 3),
+	TP_PARITY_INIT = (1 << 4),
+	NAPI_INIT = (1 << 5),
+};
+
+struct fl_pg_chunk {
+	struct page *page;
+	void *va;
+	unsigned int offset;
+	unsigned long *p_cnt;
+	dma_addr_t mapping;
+};
+
+struct rx_desc;
+struct rx_sw_desc;
+
+struct sge_fl {                     /* SGE per free-buffer list state */
+	unsigned int buf_size;      /* size of each Rx buffer */
+	unsigned int credits;       /* # of available Rx buffers */
+	unsigned int pend_cred;     /* new buffers since last FL DB ring */
+	unsigned int size;          /* capacity of free list */
+	unsigned int cidx;          /* consumer index */
+	unsigned int pidx;          /* producer index */
+	unsigned int gen;           /* free list generation */
+	struct fl_pg_chunk pg_chunk;/* page chunk cache */
+	unsigned int use_pages;     /* whether FL uses pages or sk_buffs */
+	unsigned int order;	    /* order of page allocations */
+	unsigned int alloc_size;    /* size of allocated buffer */
+	struct rx_desc *desc;       /* address of HW Rx descriptor ring */
+	struct rx_sw_desc *sdesc;   /* address of SW Rx descriptor ring */
+	dma_addr_t   phys_addr;     /* physical address of HW ring start */
+	unsigned int cntxt_id;      /* SGE context id for the free list */
+	unsigned long empty;        /* # of times queue ran out of buffers */
+	unsigned long alloc_failed; /* # of times buffer allocation failed */
+};
+
+/*
+ * Bundle size for grouping offload RX packets for delivery to the stack.
+ * Don't make this too big as we do prefetch on each packet in a bundle.
+ */
+# define RX_BUNDLE_SIZE 8
+
+struct rsp_desc;
+
+struct sge_rspq {		/* state for an SGE response queue */
+	unsigned int credits;	/* # of pending response credits */
+	unsigned int size;	/* capacity of response queue */
+	unsigned int cidx;	/* consumer index */
+	unsigned int gen;	/* current generation bit */
+	unsigned int polling;	/* is the queue serviced through NAPI? */
+	unsigned int holdoff_tmr;	/* interrupt holdoff timer in 100ns */
+	unsigned int next_holdoff;	/* holdoff time for next interrupt */
+	unsigned int rx_recycle_buf; /* whether recycling occurred
+					within current sop-eop */
+	struct rsp_desc *desc;	/* address of HW response ring */
+	dma_addr_t phys_addr;	/* physical address of the ring */
+	unsigned int cntxt_id;	/* SGE context id for the response q */
+	spinlock_t lock;	/* guards response processing */
+	struct sk_buff_head rx_queue; /* offload packet receive queue */
+	struct sk_buff *pg_skb; /* used to build frag list in napi handler */
+
+	unsigned long offload_pkts;
+	unsigned long offload_bundles;
+	unsigned long eth_pkts;	/* # of ethernet packets */
+	unsigned long pure_rsps;	/* # of pure (non-data) responses */
+	unsigned long imm_data;	/* responses with immediate data */
+	unsigned long rx_drops;	/* # of packets dropped due to no mem */
+	unsigned long async_notif; /* # of asynchronous notification events */
+	unsigned long empty;	/* # of times queue ran out of credits */
+	unsigned long nomem;	/* # of responses deferred due to no mem */
+	unsigned long unhandled_irqs;	/* # of spurious intrs */
+	unsigned long starved;
+	unsigned long restarted;
+};
+
+struct tx_desc;
+struct tx_sw_desc;
+
+struct sge_txq {		/* state for an SGE Tx queue */
+	unsigned long flags;	/* HW DMA fetch status */
+	unsigned int in_use;	/* # of in-use Tx descriptors */
+	unsigned int size;	/* # of descriptors */
+	unsigned int processed;	/* total # of descs HW has processed */
+	unsigned int cleaned;	/* total # of descs SW has reclaimed */
+	unsigned int stop_thres;	/* SW TX queue suspend threshold */
+	unsigned int cidx;	/* consumer index */
+	unsigned int pidx;	/* producer index */
+	unsigned int gen;	/* current value of generation bit */
+	unsigned int unacked;	/* Tx descriptors used since last COMPL */
+	struct tx_desc *desc;	/* address of HW Tx descriptor ring */
+	struct tx_sw_desc *sdesc;	/* address of SW Tx descriptor ring */
+	spinlock_t lock;	/* guards enqueueing of new packets */
+	unsigned int token;	/* WR token */
+	dma_addr_t phys_addr;	/* physical address of the ring */
+	struct sk_buff_head sendq;	/* List of backpressured offload packets */
+	struct tasklet_struct qresume_tsk;	/* restarts the queue */
+	unsigned int cntxt_id;	/* SGE context id for the Tx q */
+	unsigned long stops;	/* # of times q has been stopped */
+	unsigned long restarts;	/* # of queue restarts */
+};
+
+enum {				/* per port SGE statistics */
+	SGE_PSTAT_TSO,		/* # of TSO requests */
+	SGE_PSTAT_RX_CSUM_GOOD,	/* # of successful RX csum offloads */
+	SGE_PSTAT_TX_CSUM,	/* # of TX checksum offloads */
+	SGE_PSTAT_VLANEX,	/* # of VLAN tag extractions */
+	SGE_PSTAT_VLANINS,	/* # of VLAN tag insertions */
+
+	SGE_PSTAT_MAX		/* must be last */
+};
+
+struct napi_gro_fraginfo;
+
+struct sge_qset {		/* an SGE queue set */
+	struct adapter *adap;
+	struct napi_struct napi;
+	struct sge_rspq rspq;
+	struct sge_fl fl[SGE_RXQ_PER_SET];
+	struct sge_txq txq[SGE_TXQ_PER_SET];
+	int nomem;
+	void *lro_va;
+	struct net_device *netdev;
+	struct netdev_queue *tx_q;	/* associated netdev TX queue */
+	unsigned long txq_stopped;	/* which Tx queues are stopped */
+	struct timer_list tx_reclaim_timer;	/* reclaims TX buffers */
+	struct timer_list rx_reclaim_timer;	/* reclaims RX buffers */
+	unsigned long port_stats[SGE_PSTAT_MAX];
+} ____cacheline_aligned;
+
+struct sge {
+	struct sge_qset qs[SGE_QSETS];
+	spinlock_t reg_lock;	/* guards non-atomic SGE registers (eg context) */
+};
+
+struct adapter {
+	struct t3cdev tdev;
+	struct list_head adapter_list;
+	void __iomem *regs;
+	struct pci_dev *pdev;
+	unsigned long registered_device_map;
+	unsigned long open_device_map;
+	unsigned long flags;
+
+	const char *name;
+	int msg_enable;
+	unsigned int mmio_len;
+
+	struct adapter_params params;
+	unsigned int slow_intr_mask;
+	unsigned long irq_stats[IRQ_NUM_STATS];
+
+	int msix_nvectors;
+	struct {
+		unsigned short vec;
+		char desc[22];
+	} msix_info[SGE_QSETS + 1];
+
+	/* T3 modules */
+	struct sge sge;
+	struct mc7 pmrx;
+	struct mc7 pmtx;
+	struct mc7 cm;
+	struct mc5 mc5;
+
+	struct net_device *port[MAX_NPORTS];
+	unsigned int check_task_cnt;
+	struct delayed_work adap_check_task;
+	struct work_struct ext_intr_handler_task;
+	struct work_struct fatal_error_handler_task;
+	struct work_struct link_fault_handler_task;
+
+	struct work_struct db_full_task;
+	struct work_struct db_empty_task;
+	struct work_struct db_drop_task;
+
+	struct dentry *debugfs_root;
+
+	struct mutex mdio_lock;
+	spinlock_t stats_lock;
+	spinlock_t work_lock;
+
+	struct sk_buff *nofail_skb;
+};
+
+static inline u32 t3_read_reg(struct adapter *adapter, u32 reg_addr)
+{
+	u32 val = readl(adapter->regs + reg_addr);
+
+	CH_DBG(adapter, MMIO, "read register 0x%x value 0x%x\n", reg_addr, val);
+	return val;
+}
+
+static inline void t3_write_reg(struct adapter *adapter, u32 reg_addr, u32 val)
+{
+	CH_DBG(adapter, MMIO, "setting register 0x%x to 0x%x\n", reg_addr, val);
+	writel(val, adapter->regs + reg_addr);
+}
+
+static inline struct port_info *adap2pinfo(struct adapter *adap, int idx)
+{
+	return netdev_priv(adap->port[idx]);
+}
+
+static inline int phy2portid(struct cphy *phy)
+{
+	struct adapter *adap = phy->adapter;
+	struct port_info *port0 = adap2pinfo(adap, 0);
+
+	return &port0->phy == phy ? 0 : 1;
+}
+
+#define OFFLOAD_DEVMAP_BIT 15
+
+#define tdev2adap(d) container_of(d, struct adapter, tdev)
+
+static inline int offload_running(struct adapter *adapter)
+{
+	return test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map);
+}
+
+int t3_offload_tx(struct t3cdev *tdev, struct sk_buff *skb);
+
+void t3_os_ext_intr_handler(struct adapter *adapter);
+void t3_os_link_changed(struct adapter *adapter, int port_id, int link_status,
+			int speed, int duplex, int fc);
+void t3_os_phymod_changed(struct adapter *adap, int port_id);
+void t3_os_link_fault(struct adapter *adapter, int port_id, int state);
+void t3_os_link_fault_handler(struct adapter *adapter, int port_id);
+
+void t3_sge_start(struct adapter *adap);
+void t3_sge_stop(struct adapter *adap);
+void t3_start_sge_timers(struct adapter *adap);
+void t3_stop_sge_timers(struct adapter *adap);
+void t3_free_sge_resources(struct adapter *adap);
+void t3_sge_err_intr_handler(struct adapter *adapter);
+irq_handler_t t3_intr_handler(struct adapter *adap, int polling);
+netdev_tx_t t3_eth_xmit(struct sk_buff *skb, struct net_device *dev);
+int t3_mgmt_tx(struct adapter *adap, struct sk_buff *skb);
+void t3_update_qset_coalesce(struct sge_qset *qs, const struct qset_params *p);
+int t3_sge_alloc_qset(struct adapter *adapter, unsigned int id, int nports,
+		      int irq_vec_idx, const struct qset_params *p,
+		      int ntxq, struct net_device *dev,
+		      struct netdev_queue *netdevq);
+extern struct workqueue_struct *cxgb3_wq;
+
+int t3_get_edc_fw(struct cphy *phy, int edc_idx, int size);
+
+#endif				/* __T3_ADAPTER_H__ */