Merge branch 'dpaa_eth-next'

Madalin Bucur says:

====================
dpaa_eth: Add the QorIQ DPAA Ethernet driver

This patch series adds the Ethernet driver for the Freescale
QorIQ Data Path Acceleration Architecture (DPAA).

This version includes changes following the feedback received
on previous versions from Eric Dumazet, Bob Cochran, Joe Perches,
Paul Bolle, Joakim Tjernlund, Scott Wood, David Miller - thank you.

Together with the driver a managed version of alloc_percpu
is provided that simplifies the release of per-CPU memory.

The Freescale DPAA architecture consists in a series of hardware
blocks that support the Ethernet connectivity. The Ethernet driver
depends upon the following drivers that are currently in the Linux
kernel:
 - Peripheral Access Memory Unit (PAMU)
    drivers/iommu/fsl_*
 - Frame Manager (FMan) added in v4.4
    drivers/net/ethernet/freescale/fman
 - Queue Manager (QMan), Buffer Manager (BMan) added in v4.9-rc1
    drivers/soc/fsl/qbman

dpaa_eth interfaces mapping to FMan MACs:

  dpaa_eth       /eth0\     ...       /ethN\
  driver        |      |             |      |
  -------------   ----   -----------   ----   -------------
       -Ports  / Tx  Rx \    ...    / Tx  Rx \
  FMan        |          |         |          |
       -MACs  |   MAC0   |         |   MACN   |
             /   dtsec0   \  ...  /   dtsecN   \ (or tgec)
            /              \     /              \(or memac)
  ---------  --------------  ---  --------------  ---------
      FMan, FMan Port, FMan SP, FMan MURAM drivers
  ---------------------------------------------------------
      FMan HW blocks: MURAM, MACs, Ports, SP
  ---------------------------------------------------------

dpaa_eth relation to QMan, FMan:
              ________________________________
  dpaa_eth   /            eth0                \
  driver    /                                  \
  ---------   -^-   -^-   -^-   ---    ---------
  QMan driver / \   / \   / \  \   /  | BMan    |
             |Rx | |Rx | |Tx | |Tx |  | driver  |
  ---------  |Dfl| |Err| |Cnf| |FQs|  |         |
  QMan HW    |FQ | |FQ | |FQ | |   |  |         |
             /   \ /   \ /   \  \ /   |         |
  ---------   ---   ---   ---   -v-    ---------
            |        FMan QMI         |         |
            | FMan HW       FMan BMI  | BMan HW |
              -----------------------   --------

where the acronyms used above (and in the code) are:
DPAA = Data Path Acceleration Architecture
FMan = DPAA Frame Manager
QMan = DPAA Queue Manager
BMan = DPAA Buffers Manager
QMI = QMan interface in FMan
BMI = BMan interface in FMan
FMan SP = FMan Storage Profiles
MURAM = Multi-user RAM in FMan
FQ = QMan Frame Queue
Rx Dfl FQ = default reception FQ
Rx Err FQ = Rx error frames FQ
Tx Cnf FQ = Tx confirmation FQ
Tx FQs = transmission frame queues
dtsec = datapath three speed Ethernet controller (10/100/1000 Mbps)
tgec = ten gigabit Ethernet controller (10 Gbps)
memac = multirate Ethernet MAC (10/100/1000/10000)

Changes from v7:
 - remove the debug option to use a common buffer pool for all the
   interfaces

Changed from v6:
 - fixed an issue on an error path in dpaa_set_mac_address()
 - removed NDO operation definitions that were not needed
 - sorted the local variable declarations
 - cleaned up a few checkpatch checks
 - removed friendly network interface naming code

Changes from v5:
 - adapt to the latest Q/BMan drivers API
 - use build_skb() on Rx path instead of buffer pool refill path
 - proper support for multiple buffer pools
 - align function, variable names, code cleanup
 - driver file structure cleanup

Changes from v4:
 - addressed feedback from Scott Wood and Joe Perches
 - fixed spelling
 - fixed leak of uninitialized stack to userspace
 - fix prints
 - replace raw_cpu_ptr() with this_cpu_ptr()
 - remove _s from the end of structure names
 - remove underscores at start of functions, goto labels
 - remove likely in error paths
 - use container_of() instead of open casts
 - remove priv from the driver name
 - move return type on same line with function name
 - drop DPA_READ_SKB_PTR/DPA_WRITE_SKB_PTR

Changes from v3:
 - removed bogus delay and comment in .ndo_stop implementation
 - addressed minor issues reported by David Miller

Changes from v2:
 - removed debugfs, moved exports to ethtool statistics
 - removed congestion groups Kconfig params

Changes from v1:
 - bpool level Kconfig options removed
 - print format using pr_fmt, cleaned up prints
 - __hot/__cold removed
 - gratuitous unlikely() removed
 - code style aligned, consistent spacing for declarations
 - comment formatting
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/driver-model/devres.txt

@@ -332,6 +332,10 @@ MEM
 MFD
  devm_mfd_add_devices()
 
+PER-CPU MEM
+  devm_alloc_percpu()
+  devm_free_percpu()
+
 PCI
   pcim_enable_device()	: after success, all PCI ops become managed
   pcim_pin_device()	: keep PCI device enabled after release

arch/powerpc/configs/dpaa.config

 CONFIG_FSL_DPAA=y
+CONFIG_FSL_PAMU=y
+CONFIG_FSL_FMAN=y
+CONFIG_FSL_DPAA_ETH=y

drivers/base/devres.c

@@ -10,6 +10,7 @@
 #include <linux/device.h>
 #include <linux/module.h>
 #include <linux/slab.h>
+#include <linux/percpu.h>
 
 #include "base.h"
 
@@ -985,3 +986,68 @@ void devm_free_pages(struct device *dev, unsigned long addr)
 			       &devres));
 }
 EXPORT_SYMBOL_GPL(devm_free_pages);
+
+static void devm_percpu_release(struct device *dev, void *pdata)
+{
+	void __percpu *p;
+
+	p = *(void __percpu **)pdata;
+	free_percpu(p);
+}
+
+static int devm_percpu_match(struct device *dev, void *data, void *p)
+{
+	struct devres *devr = container_of(data, struct devres, data);
+
+	return *(void **)devr->data == p;
+}
+
+/**
+ * __devm_alloc_percpu - Resource-managed alloc_percpu
+ * @dev: Device to allocate per-cpu memory for
+ * @size: Size of per-cpu memory to allocate
+ * @align: Alignment of per-cpu memory to allocate
+ *
+ * Managed alloc_percpu. Per-cpu memory allocated with this function is
+ * automatically freed on driver detach.
+ *
+ * RETURNS:
+ * Pointer to allocated memory on success, NULL on failure.
+ */
+void __percpu *__devm_alloc_percpu(struct device *dev, size_t size,
+		size_t align)
+{
+	void *p;
+	void __percpu *pcpu;
+
+	pcpu = __alloc_percpu(size, align);
+	if (!pcpu)
+		return NULL;
+
+	p = devres_alloc(devm_percpu_release, sizeof(void *), GFP_KERNEL);
+	if (!p) {
+		free_percpu(pcpu);
+		return NULL;
+	}
+
+	*(void __percpu **)p = pcpu;
+
+	devres_add(dev, p);
+
+	return pcpu;
+}
+EXPORT_SYMBOL_GPL(__devm_alloc_percpu);
+
+/**
+ * devm_free_percpu - Resource-managed free_percpu
+ * @dev: Device this memory belongs to
+ * @pdata: Per-cpu memory to free
+ *
+ * Free memory allocated with devm_alloc_percpu().
+ */
+void devm_free_percpu(struct device *dev, void __percpu *pdata)
+{
+	WARN_ON(devres_destroy(dev, devm_percpu_release, devm_percpu_match,
+			       (void *)pdata));
+}
+EXPORT_SYMBOL_GPL(devm_free_percpu);

drivers/net/ethernet/freescale/Kconfig

@@ -93,4 +93,6 @@ config GIANFAR
 	  and MPC86xx family of chips, the eTSEC on LS1021A and the FEC
 	  on the 8540.
 
+source "drivers/net/ethernet/freescale/dpaa/Kconfig"
+
 endif # NET_VENDOR_FREESCALE

drivers/net/ethernet/freescale/Makefile

@@ -22,3 +22,4 @@ obj-$(CONFIG_UCC_GETH) += ucc_geth_driver.o
 ucc_geth_driver-objs := ucc_geth.o ucc_geth_ethtool.o
 
 obj-$(CONFIG_FSL_FMAN) += fman/
+obj-$(CONFIG_FSL_DPAA_ETH) += dpaa/

drivers/net/ethernet/freescale/dpaa/Kconfig

+menuconfig FSL_DPAA_ETH
+	tristate "DPAA Ethernet"
+	depends on FSL_SOC && FSL_DPAA && FSL_FMAN
+	select PHYLIB
+	select FSL_FMAN_MAC
+	---help---
+	  Data Path Acceleration Architecture Ethernet driver,
+	  supporting the Freescale QorIQ chips.
+	  Depends on Freescale Buffer Manager and Queue Manager
+	  driver and Frame Manager Driver.

drivers/net/ethernet/freescale/dpaa/Makefile

+#
+# Makefile for the Freescale DPAA Ethernet controllers
+#
+
+# Include FMan headers
+FMAN        = $(srctree)/drivers/net/ethernet/freescale/fman
+ccflags-y += -I$(FMAN)
+
+obj-$(CONFIG_FSL_DPAA_ETH) += fsl_dpa.o
+
+fsl_dpa-objs += dpaa_eth.o dpaa_ethtool.o dpaa_eth_sysfs.o
+CFLAGS_dpaa_eth.o := -I$(src)

drivers/net/ethernet/freescale/dpaa/dpaa_eth.h

+/* Copyright 2008 - 2016 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.
+ */
+
+#ifndef __DPAA_H
+#define __DPAA_H
+
+#include <linux/netdevice.h>
+#include <soc/fsl/qman.h>
+#include <soc/fsl/bman.h>
+
+#include "fman.h"
+#include "mac.h"
+#include "dpaa_eth_trace.h"
+
+#define DPAA_ETH_TXQ_NUM	NR_CPUS
+
+#define DPAA_BPS_NUM 3 /* number of bpools per interface */
+
+/* More detailed FQ types - used for fine-grained WQ assignments */
+enum dpaa_fq_type {
+	FQ_TYPE_RX_DEFAULT = 1, /* Rx Default FQs */
+	FQ_TYPE_RX_ERROR,	/* Rx Error FQs */
+	FQ_TYPE_TX,		/* "Real" Tx FQs */
+	FQ_TYPE_TX_CONFIRM,	/* Tx default Conf FQ (actually an Rx FQ) */
+	FQ_TYPE_TX_CONF_MQ,	/* Tx conf FQs (one for each Tx FQ) */
+	FQ_TYPE_TX_ERROR,	/* Tx Error FQs (these are actually Rx FQs) */
+};
+
+struct dpaa_fq {
+	struct qman_fq fq_base;
+	struct list_head list;
+	struct net_device *net_dev;
+	bool init;
+	u32 fqid;
+	u32 flags;
+	u16 channel;
+	u8 wq;
+	enum dpaa_fq_type fq_type;
+};
+
+struct dpaa_fq_cbs {
+	struct qman_fq rx_defq;
+	struct qman_fq tx_defq;
+	struct qman_fq rx_errq;
+	struct qman_fq tx_errq;
+	struct qman_fq egress_ern;
+};
+
+struct dpaa_bp {
+	/* device used in the DMA mapping operations */
+	struct device *dev;
+	/* current number of buffers in the buffer pool alloted to each CPU */
+	int __percpu *percpu_count;
+	/* all buffers allocated for this pool have this raw size */
+	size_t raw_size;
+	/* all buffers in this pool have this same usable size */
+	size_t size;
+	/* the buffer pools are initialized with config_count buffers for each
+	 * CPU; at runtime the number of buffers per CPU is constantly brought
+	 * back to this level
+	 */
+	u16 config_count;
+	u8 bpid;
+	struct bman_pool *pool;
+	/* bpool can be seeded before use by this cb */
+	int (*seed_cb)(struct dpaa_bp *);
+	/* bpool can be emptied before freeing by this cb */
+	void (*free_buf_cb)(const struct dpaa_bp *, struct bm_buffer *);
+	atomic_t refs;
+};
+
+struct dpaa_rx_errors {
+	u64 dme;		/* DMA Error */
+	u64 fpe;		/* Frame Physical Error */
+	u64 fse;		/* Frame Size Error */
+	u64 phe;		/* Header Error */
+};
+
+/* Counters for QMan ERN frames - one counter per rejection code */
+struct dpaa_ern_cnt {
+	u64 cg_tdrop;		/* Congestion group taildrop */
+	u64 wred;		/* WRED congestion */
+	u64 err_cond;		/* Error condition */
+	u64 early_window;	/* Order restoration, frame too early */
+	u64 late_window;	/* Order restoration, frame too late */
+	u64 fq_tdrop;		/* FQ taildrop */
+	u64 fq_retired;		/* FQ is retired */
+	u64 orp_zero;		/* ORP disabled */
+};
+
+struct dpaa_napi_portal {
+	struct napi_struct napi;
+	struct qman_portal *p;
+	bool down;
+};
+
+struct dpaa_percpu_priv {
+	struct net_device *net_dev;
+	struct dpaa_napi_portal np;
+	u64 in_interrupt;
+	u64 tx_confirm;
+	/* fragmented (non-linear) skbuffs received from the stack */
+	u64 tx_frag_skbuffs;
+	struct rtnl_link_stats64 stats;
+	struct dpaa_rx_errors rx_errors;
+	struct dpaa_ern_cnt ern_cnt;
+};
+
+struct dpaa_buffer_layout {
+	u16 priv_data_size;
+};
+
+struct dpaa_priv {
+	struct dpaa_percpu_priv __percpu *percpu_priv;
+	struct dpaa_bp *dpaa_bps[DPAA_BPS_NUM];
+	/* Store here the needed Tx headroom for convenience and speed
+	 * (even though it can be computed based on the fields of buf_layout)
+	 */
+	u16 tx_headroom;
+	struct net_device *net_dev;
+	struct mac_device *mac_dev;
+	struct qman_fq *egress_fqs[DPAA_ETH_TXQ_NUM];
+	struct qman_fq *conf_fqs[DPAA_ETH_TXQ_NUM];
+
+	u16 channel;
+	struct list_head dpaa_fq_list;
+
+	u32 msg_enable;	/* net_device message level */
+
+	struct {
+		/* All egress queues to a given net device belong to one
+		 * (and the same) congestion group.
+		 */
+		struct qman_cgr cgr;
+		/* If congested, when it began. Used for performance stats. */
+		u32 congestion_start_jiffies;
+		/* Number of jiffies the Tx port was congested. */
+		u32 congested_jiffies;
+		/* Counter for the number of times the CGR
+		 * entered congestion state
+		 */
+		u32 cgr_congested_count;
+	} cgr_data;
+	/* Use a per-port CGR for ingress traffic. */
+	bool use_ingress_cgr;
+	struct qman_cgr ingress_cgr;
+
+	struct dpaa_buffer_layout buf_layout[2];
+	u16 rx_headroom;
+};
+
+/* from dpaa_ethtool.c */
+extern const struct ethtool_ops dpaa_ethtool_ops;
+
+/* from dpaa_eth_sysfs.c */
+void dpaa_eth_sysfs_remove(struct device *dev);
+void dpaa_eth_sysfs_init(struct device *dev);
+#endif	/* __DPAA_H */

drivers/net/ethernet/freescale/dpaa/dpaa_eth_sysfs.c

+/* Copyright 2008-2016 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.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/of_net.h>
+#include "dpaa_eth.h"
+#include "mac.h"
+
+static ssize_t dpaa_eth_show_addr(struct device *dev,
+				  struct device_attribute *attr, char *buf)
+{
+	struct dpaa_priv *priv = netdev_priv(to_net_dev(dev));
+	struct mac_device *mac_dev = priv->mac_dev;
+
+	if (mac_dev)
+		return sprintf(buf, "%llx",
+				(unsigned long long)mac_dev->res->start);
+	else
+		return sprintf(buf, "none");
+}
+
+static ssize_t dpaa_eth_show_fqids(struct device *dev,
+				   struct device_attribute *attr, char *buf)
+{
+	struct dpaa_priv *priv = netdev_priv(to_net_dev(dev));
+	struct dpaa_fq *prev = NULL;
+	char *prevstr = NULL;
+	struct dpaa_fq *tmp;
+	struct dpaa_fq *fq;
+	u32 first_fqid = 0;
+	u32 last_fqid = 0;
+	ssize_t bytes = 0;
+	char *str;
+	int i = 0;
+
+	list_for_each_entry_safe(fq, tmp, &priv->dpaa_fq_list, list) {
+		switch (fq->fq_type) {
+		case FQ_TYPE_RX_DEFAULT:
+			str = "Rx default";
+			break;
+		case FQ_TYPE_RX_ERROR:
+			str = "Rx error";
+			break;
+		case FQ_TYPE_TX_CONFIRM:
+			str = "Tx default confirmation";
+			break;
+		case FQ_TYPE_TX_CONF_MQ:
+			str = "Tx confirmation (mq)";
+			break;
+		case FQ_TYPE_TX_ERROR:
+			str = "Tx error";
+			break;
+		case FQ_TYPE_TX:
+			str = "Tx";
+			break;
+		default:
+			str = "Unknown";
+		}
+
+		if (prev && (abs(fq->fqid - prev->fqid) != 1 ||
+			     str != prevstr)) {
+			if (last_fqid == first_fqid)
+				bytes += sprintf(buf + bytes,
+					"%s: %d\n", prevstr, prev->fqid);
+			else
+				bytes += sprintf(buf + bytes,
+					"%s: %d - %d\n", prevstr,
+					first_fqid, last_fqid);
+		}
+
+		if (prev && abs(fq->fqid - prev->fqid) == 1 &&
+		    str == prevstr) {
+			last_fqid = fq->fqid;
+		} else {
+			first_fqid = fq->fqid;
+			last_fqid = fq->fqid;
+		}
+
+		prev = fq;
+		prevstr = str;
+		i++;
+	}
+
+	if (prev) {
+		if (last_fqid == first_fqid)
+			bytes += sprintf(buf + bytes, "%s: %d\n", prevstr,
+					prev->fqid);
+		else
+			bytes += sprintf(buf + bytes, "%s: %d - %d\n", prevstr,
+					first_fqid, last_fqid);
+	}
+
+	return bytes;
+}
+
+static ssize_t dpaa_eth_show_bpids(struct device *dev,
+				   struct device_attribute *attr, char *buf)
+{
+	struct dpaa_priv *priv = netdev_priv(to_net_dev(dev));
+	ssize_t bytes = 0;
+	int i = 0;
+
+	for (i = 0; i < DPAA_BPS_NUM; i++)
+		bytes += snprintf(buf + bytes, PAGE_SIZE - bytes, "%u\n",
+				  priv->dpaa_bps[i]->bpid);
+
+	return bytes;
+}
+
+static struct device_attribute dpaa_eth_attrs[] = {
+	__ATTR(device_addr, 0444, dpaa_eth_show_addr, NULL),
+	__ATTR(fqids, 0444, dpaa_eth_show_fqids, NULL),
+	__ATTR(bpids, 0444, dpaa_eth_show_bpids, NULL),
+};
+
+void dpaa_eth_sysfs_init(struct device *dev)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(dpaa_eth_attrs); i++)
+		if (device_create_file(dev, &dpaa_eth_attrs[i])) {
+			dev_err(dev, "Error creating sysfs file\n");
+			while (i > 0)
+				device_remove_file(dev, &dpaa_eth_attrs[--i]);
+			return;
+		}
+}
+
+void dpaa_eth_sysfs_remove(struct device *dev)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(dpaa_eth_attrs); i++)
+		device_remove_file(dev, &dpaa_eth_attrs[i]);
+}

drivers/net/ethernet/freescale/dpaa/dpaa_eth_trace.h

+/* Copyright 2013-2015 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	dpaa_eth
+
+#if !defined(_DPAA_ETH_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _DPAA_ETH_TRACE_H
+
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include "dpaa_eth.h"
+#include <linux/tracepoint.h>
+
+#define fd_format_name(format)	{ qm_fd_##format, #format }
+#define fd_format_list	\
+	fd_format_name(contig),	\
+	fd_format_name(sg)
+
+/* This is used to declare a class of events.
+ * individual events of this type will be defined below.
+ */
+
+/* Store details about a frame descriptor and the FQ on which it was
+ * transmitted/received.
+ */
+DECLARE_EVENT_CLASS(dpaa_eth_fd,
+	/* Trace function prototype */
+	TP_PROTO(struct net_device *netdev,
+		 struct qman_fq *fq,
+		 const struct qm_fd *fd),
+
+	/* Repeat argument list here */
+	TP_ARGS(netdev, fq, 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(u32,	fqid)
+		__field(u64,	fd_addr)
+		__field(u8,	fd_format)
+		__field(u16,	fd_offset)
+		__field(u32,	fd_length)
+		__field(u32,	fd_status)
+		__string(name,	netdev->name)
+	),
+
+	/* The function that assigns values to the above declared fields */
+	TP_fast_assign(
+		__entry->fqid = fq->fqid;
+		__entry->fd_addr = qm_fd_addr_get64(fd);
+		__entry->fd_format = qm_fd_get_format(fd);
+		__entry->fd_offset = qm_fd_get_offset(fd);
+		__entry->fd_length = qm_fd_get_length(fd);
+		__entry->fd_status = fd->status;
+		__assign_str(name, netdev->name);
+	),
+
+	/* This is what gets printed when the trace event is triggered */
+	TP_printk("[%s] fqid=%d, fd: addr=0x%llx, format=%s, off=%u, len=%u, status=0x%08x",
+		  __get_str(name), __entry->fqid, __entry->fd_addr,
+		  __print_symbolic(__entry->fd_format, fd_format_list),
+		  __entry->fd_offset, __entry->fd_length, __entry->fd_status)
+);
+
+/* 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(dpaa_eth_fd, dpaa_tx_fd,
+
+	TP_PROTO(struct net_device *netdev,
+		 struct qman_fq *fq,
+		 const struct qm_fd *fd),
+
+	TP_ARGS(netdev, fq, fd)
+);
+
+/* Rx fd */
+DEFINE_EVENT(dpaa_eth_fd, dpaa_rx_fd,
+
+	TP_PROTO(struct net_device *netdev,
+		 struct qman_fq *fq,
+		 const struct qm_fd *fd),
+
+	TP_ARGS(netdev, fq, fd)
+);
+
+/* Tx confirmation fd */
+DEFINE_EVENT(dpaa_eth_fd, dpaa_tx_conf_fd,
+
+	TP_PROTO(struct net_device *netdev,
+		 struct qman_fq *fq,
+		 const struct qm_fd *fd),
+
+	TP_ARGS(netdev, fq, fd)
+);
+
+/* 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 /* _DPAA_ETH_TRACE_H */
+
+/* This must be outside ifdef _DPAA_ETH_TRACE_H */
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_FILE	dpaa_eth_trace
+#include <trace/define_trace.h>

include/linux/device.h

@@ -698,6 +698,25 @@ static inline int devm_add_action_or_reset(struct device *dev,
 	return ret;
 }
 
+/**
+ * devm_alloc_percpu - Resource-managed alloc_percpu
+ * @dev: Device to allocate per-cpu memory for
+ * @type: Type to allocate per-cpu memory for
+ *
+ * Managed alloc_percpu. Per-cpu memory allocated with this function is
+ * automatically freed on driver detach.
+ *
+ * RETURNS:
+ * Pointer to allocated memory on success, NULL on failure.
+ */
+#define devm_alloc_percpu(dev, type)      \
+	((typeof(type) __percpu *)__devm_alloc_percpu((dev), sizeof(type), \
+						      __alignof__(type)))
+
+void __percpu *__devm_alloc_percpu(struct device *dev, size_t size,
+				   size_t align);
+void devm_free_percpu(struct device *dev, void __percpu *pdata);
+
 struct device_dma_parameters {
 	/*
 	 * a low level driver may set these to teach IOMMU code about