staging: fsl-dpaa2/eth: Add Freescale DPAA2 Ethernet driver

Introduce the DPAA2 Ethernet driver, which manages Datapath
Network Interface (DPNI) objects discovered on the MC bus.

In addition to DPNIs, the Ethernet driver uses several other
MC objects to build a network interface abstraction: buffer
pools (DPBPs), I/O Portals (DPIOs) and concentrators (DPCONs).

The starting point is the SDK 2.0 GA 1703 driver, plus the following
changes:
- removed busy poll code (integrated into netstack)
- minor signature change for dpaa2_eth_get_stats
- debugfs support removed (contained into different patch)
- Tx queues registered to XPS
- max MTU handling changed according to netdevice update
- dropped dpaa2_sg_{le_to_cpu/cpu_to_le} - no longer needed
  (BIG_ENDIAN support not tested yet)

This is a squashed commit containing the contributions of the following
authors:
Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: Bogdan Hamciuc <bogdan.hamciuc@nxp.com>
Signed-off-by: Cristian Sovaiala <cristian.sovaiala@nxp.com>
Signed-off-by: Alexandru Marginean <alexandru.marginean@nxp.com>
Signed-off-by: Roy Pledge <roy.pledge@nxp.com>
Signed-off-by: Haiying Wang <haiying.wang@nxp.com>
Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com>
Signed-off-by: J. German Rivera <German.Rivera@freescale.com>
Signed-off-by: Itai Katz <itai.katz@freescale.com>
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>

Signed-off-by: Bogdan Purcareata <bogdan.purcareata@nxp.com>

1 files changed, 184 insertions, 0 deletions

diff --git a/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth-trace.h b/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth-trace.h
new file mode 100644
index 0000000..e8e6522
--- /dev/null
+++ b/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth-trace.h
@@ -0,0 +1,184 @@
+/* Copyright 2014-2015 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.
+ */
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM	dpaa2_eth
+
+#if !defined(_DPAA2_ETH_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _DPAA2_ETH_TRACE_H
+
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/tracepoint.h>
+
+#define TR_FMT "[%s] fd: addr=0x%llx, len=%u, off=%u"
+/* trace_printk format for raw buffer event class */
+#define TR_BUF_FMT "[%s] vaddr=%p size=%zu dma_addr=%pad map_size=%zu bpid=%d"
+
+/* This is used to declare a class of events.
+ * individual events of this type will be defined below.
+ */
+
+/* Store details about a frame descriptor */
+DECLARE_EVENT_CLASS(dpaa2_eth_fd,
+		    /* Trace function prototype */
+		    TP_PROTO(struct net_device *netdev,
+			     const struct dpaa2_fd *fd),
+
+		    /* Repeat argument list here */
+		    TP_ARGS(netdev, fd),
+
+		    /* A structure containing the relevant information we want
+		     * to record. Declare name and type for each normal element,
+		     * name, type and size for arrays. Use __string for variable
+		     * length strings.
+		     */
+		    TP_STRUCT__entry(
+				     __field(u64, fd_addr)
+				     __field(u32, fd_len)
+				     __field(u16, fd_offset)
+				     __string(name, netdev->name)
+		    ),
+
+		    /* The function that assigns values to the above declared
+		     * fields
+		     */
+		    TP_fast_assign(
+				   __entry->fd_addr = dpaa2_fd_get_addr(fd);
+				   __entry->fd_len = dpaa2_fd_get_len(fd);
+				   __entry->fd_offset = dpaa2_fd_get_offset(fd);
+				   __assign_str(name, netdev->name);
+		    ),
+
+		    /* This is what gets printed when the trace event is
+		     * triggered.
+		     */
+		    TP_printk(TR_FMT,
+			      __get_str(name),
+			      __entry->fd_addr,
+			      __entry->fd_len,
+			      __entry->fd_offset)
+);
+
+/* Now declare events of the above type. Format is:
+ * DEFINE_EVENT(class, name, proto, args), with proto and args same as for class
+ */
+
+/* Tx (egress) fd */
+DEFINE_EVENT(dpaa2_eth_fd, dpaa2_tx_fd,
+	     TP_PROTO(struct net_device *netdev,
+		      const struct dpaa2_fd *fd),
+
+	     TP_ARGS(netdev, fd)
+);
+
+/* Rx fd */
+DEFINE_EVENT(dpaa2_eth_fd, dpaa2_rx_fd,
+	     TP_PROTO(struct net_device *netdev,
+		      const struct dpaa2_fd *fd),
+
+	     TP_ARGS(netdev, fd)
+);
+
+/* Tx confirmation fd */
+DEFINE_EVENT(dpaa2_eth_fd, dpaa2_tx_conf_fd,
+	     TP_PROTO(struct net_device *netdev,
+		      const struct dpaa2_fd *fd),
+
+	     TP_ARGS(netdev, fd)
+);
+
+/* Log data about raw buffers. Useful for tracing DPBP content. */
+TRACE_EVENT(dpaa2_eth_buf_seed,
+	    /* Trace function prototype */
+	    TP_PROTO(struct net_device *netdev,
+		     /* virtual address and size */
+		     void *vaddr,
+		     size_t size,
+		     /* dma map address and size */
+		     dma_addr_t dma_addr,
+		     size_t map_size,
+		     /* buffer pool id, if relevant */
+		     u16 bpid),
+
+	    /* Repeat argument list here */
+	    TP_ARGS(netdev, vaddr, size, dma_addr, map_size, bpid),
+
+	    /* A structure containing the relevant information we want
+	     * to record. Declare name and type for each normal element,
+	     * name, type and size for arrays. Use __string for variable
+	     * length strings.
+	     */
+	    TP_STRUCT__entry(
+			     __field(void *, vaddr)
+			     __field(size_t, size)
+			     __field(dma_addr_t, dma_addr)
+			     __field(size_t, map_size)
+			     __field(u16, bpid)
+			     __string(name, netdev->name)
+	    ),
+
+	    /* The function that assigns values to the above declared
+	     * fields
+	     */
+	    TP_fast_assign(
+			   __entry->vaddr = vaddr;
+			   __entry->size = size;
+			   __entry->dma_addr = dma_addr;
+			   __entry->map_size = map_size;
+			   __entry->bpid = bpid;
+			   __assign_str(name, netdev->name);
+	    ),
+
+	    /* This is what gets printed when the trace event is
+	     * triggered.
+	     */
+	    TP_printk(TR_BUF_FMT,
+		      __get_str(name),
+		      __entry->vaddr,
+		      __entry->size,
+		      &__entry->dma_addr,
+		      __entry->map_size,
+		      __entry->bpid)
+);
+
+/* If only one event of a certain type needs to be declared, use TRACE_EVENT().
+ * The syntax is the same as for DECLARE_EVENT_CLASS().
+ */
+
+#endif /* _DPAA2_ETH_TRACE_H */
+
+/* This must be outside ifdef _DPAA2_ETH_TRACE_H */
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_FILE	dpaa2-eth-trace
+#include <trace/define_trace.h>