dpaa_eth.c 77.2 KB
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/* 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.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/init.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/of_mdio.h>
#include <linux/of_net.h>
#include <linux/io.h>
#include <linux/if_arp.h>
#include <linux/if_vlan.h>
#include <linux/icmp.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/udp.h>
#include <linux/tcp.h>
#include <linux/net.h>
#include <linux/skbuff.h>
#include <linux/etherdevice.h>
#include <linux/if_ether.h>
#include <linux/highmem.h>
#include <linux/percpu.h>
#include <linux/dma-mapping.h>
#include <linux/sort.h>
#include <soc/fsl/bman.h>
#include <soc/fsl/qman.h>

#include "fman.h"
#include "fman_port.h"
#include "mac.h"
#include "dpaa_eth.h"

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/* CREATE_TRACE_POINTS only needs to be defined once. Other dpaa files
 * using trace events only need to #include <trace/events/sched.h>
 */
#define CREATE_TRACE_POINTS
#include "dpaa_eth_trace.h"

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static int debug = -1;
module_param(debug, int, 0444);
MODULE_PARM_DESC(debug, "Module/Driver verbosity level (0=none,...,16=all)");

static u16 tx_timeout = 1000;
module_param(tx_timeout, ushort, 0444);
MODULE_PARM_DESC(tx_timeout, "The Tx timeout in ms");

#define FM_FD_STAT_RX_ERRORS						\
	(FM_FD_ERR_DMA | FM_FD_ERR_PHYSICAL	| \
	 FM_FD_ERR_SIZE | FM_FD_ERR_CLS_DISCARD | \
	 FM_FD_ERR_EXTRACTION | FM_FD_ERR_NO_SCHEME	| \
	 FM_FD_ERR_PRS_TIMEOUT | FM_FD_ERR_PRS_ILL_INSTRUCT | \
	 FM_FD_ERR_PRS_HDR_ERR)

#define FM_FD_STAT_TX_ERRORS \
	(FM_FD_ERR_UNSUPPORTED_FORMAT | \
	 FM_FD_ERR_LENGTH | FM_FD_ERR_DMA)

#define DPAA_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | \
			  NETIF_MSG_LINK | NETIF_MSG_IFUP | \
			  NETIF_MSG_IFDOWN)

#define DPAA_INGRESS_CS_THRESHOLD 0x10000000
/* Ingress congestion threshold on FMan ports
 * The size in bytes of the ingress tail-drop threshold on FMan ports.
 * Traffic piling up above this value will be rejected by QMan and discarded
 * by FMan.
 */

/* Size in bytes of the FQ taildrop threshold */
#define DPAA_FQ_TD 0x200000

#define DPAA_CS_THRESHOLD_1G 0x06000000
/* Egress congestion threshold on 1G ports, range 0x1000 .. 0x10000000
 * The size in bytes of the egress Congestion State notification threshold on
 * 1G ports. The 1G dTSECs can quite easily be flooded by cores doing Tx in a
 * tight loop (e.g. by sending UDP datagrams at "while(1) speed"),
 * and the larger the frame size, the more acute the problem.
 * So we have to find a balance between these factors:
 * - avoiding the device staying congested for a prolonged time (risking
 *   the netdev watchdog to fire - see also the tx_timeout module param);
 * - affecting performance of protocols such as TCP, which otherwise
 *   behave well under the congestion notification mechanism;
 * - preventing the Tx cores from tightly-looping (as if the congestion
 *   threshold was too low to be effective);
 * - running out of memory if the CS threshold is set too high.
 */

#define DPAA_CS_THRESHOLD_10G 0x10000000
/* The size in bytes of the egress Congestion State notification threshold on
 * 10G ports, range 0x1000 .. 0x10000000
 */

/* Largest value that the FQD's OAL field can hold */
#define FSL_QMAN_MAX_OAL	127

/* Default alignment for start of data in an Rx FD */
#define DPAA_FD_DATA_ALIGNMENT  16

/* Values for the L3R field of the FM Parse Results
 */
/* L3 Type field: First IP Present IPv4 */
#define FM_L3_PARSE_RESULT_IPV4	0x8000
/* L3 Type field: First IP Present IPv6 */
#define FM_L3_PARSE_RESULT_IPV6	0x4000
/* Values for the L4R field of the FM Parse Results */
/* L4 Type field: UDP */
#define FM_L4_PARSE_RESULT_UDP	0x40
/* L4 Type field: TCP */
#define FM_L4_PARSE_RESULT_TCP	0x20

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/* FD status field indicating whether the FM Parser has attempted to validate
 * the L4 csum of the frame.
 * Note that having this bit set doesn't necessarily imply that the checksum
 * is valid. One would have to check the parse results to find that out.
 */
#define FM_FD_STAT_L4CV         0x00000004

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#define DPAA_SGT_MAX_ENTRIES 16 /* maximum number of entries in SG Table */
#define DPAA_BUFF_RELEASE_MAX 8 /* maximum number of buffers released at once */

#define FSL_DPAA_BPID_INV		0xff
#define FSL_DPAA_ETH_MAX_BUF_COUNT	128
#define FSL_DPAA_ETH_REFILL_THRESHOLD	80

#define DPAA_TX_PRIV_DATA_SIZE	16
#define DPAA_PARSE_RESULTS_SIZE sizeof(struct fman_prs_result)
#define DPAA_TIME_STAMP_SIZE 8
#define DPAA_HASH_RESULTS_SIZE 8
#define DPAA_RX_PRIV_DATA_SIZE	(u16)(DPAA_TX_PRIV_DATA_SIZE + \
					dpaa_rx_extra_headroom)

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#define DPAA_ETH_PCD_RXQ_NUM	128
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#define DPAA_ENQUEUE_RETRIES	100000

enum port_type {RX, TX};

struct fm_port_fqs {
	struct dpaa_fq *tx_defq;
	struct dpaa_fq *tx_errq;
	struct dpaa_fq *rx_defq;
	struct dpaa_fq *rx_errq;
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	struct dpaa_fq *rx_pcdq;
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};

/* All the dpa bps in use at any moment */
static struct dpaa_bp *dpaa_bp_array[BM_MAX_NUM_OF_POOLS];

/* The raw buffer size must be cacheline aligned */
#define DPAA_BP_RAW_SIZE 4096
/* When using more than one buffer pool, the raw sizes are as follows:
 * 1 bp: 4KB
 * 2 bp: 2KB, 4KB
 * 3 bp: 1KB, 2KB, 4KB
 * 4 bp: 1KB, 2KB, 4KB, 8KB
 */
static inline size_t bpool_buffer_raw_size(u8 index, u8 cnt)
{
	size_t res = DPAA_BP_RAW_SIZE / 4;
	u8 i;

	for (i = (cnt < 3) ? cnt : 3; i < 3 + index; i++)
		res *= 2;
	return res;
}

/* FMan-DMA requires 16-byte alignment for Rx buffers, but SKB_DATA_ALIGN is
 * even stronger (SMP_CACHE_BYTES-aligned), so we just get away with that,
 * via SKB_WITH_OVERHEAD(). We can't rely on netdev_alloc_frag() giving us
 * half-page-aligned buffers, so we reserve some more space for start-of-buffer
 * alignment.
 */
#define dpaa_bp_size(raw_size) SKB_WITH_OVERHEAD((raw_size) - SMP_CACHE_BYTES)

static int dpaa_max_frm;

static int dpaa_rx_extra_headroom;

#define dpaa_get_max_mtu()	\
	(dpaa_max_frm - (VLAN_ETH_HLEN + ETH_FCS_LEN))

static int dpaa_netdev_init(struct net_device *net_dev,
			    const struct net_device_ops *dpaa_ops,
			    u16 tx_timeout)
{
	struct dpaa_priv *priv = netdev_priv(net_dev);
	struct device *dev = net_dev->dev.parent;
	struct dpaa_percpu_priv *percpu_priv;
	const u8 *mac_addr;
	int i, err;

	/* Although we access another CPU's private data here
	 * we do it at initialization so it is safe
	 */
	for_each_possible_cpu(i) {
		percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
		percpu_priv->net_dev = net_dev;
	}

	net_dev->netdev_ops = dpaa_ops;
	mac_addr = priv->mac_dev->addr;

	net_dev->mem_start = priv->mac_dev->res->start;
	net_dev->mem_end = priv->mac_dev->res->end;

	net_dev->min_mtu = ETH_MIN_MTU;
	net_dev->max_mtu = dpaa_get_max_mtu();

	net_dev->hw_features |= (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
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				 NETIF_F_LLTX | NETIF_F_RXHASH);
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	net_dev->hw_features |= NETIF_F_SG | NETIF_F_HIGHDMA;
	/* The kernels enables GSO automatically, if we declare NETIF_F_SG.
	 * For conformity, we'll still declare GSO explicitly.
	 */
	net_dev->features |= NETIF_F_GSO;
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	net_dev->features |= NETIF_F_RXCSUM;
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	net_dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
	/* we do not want shared skbs on TX */
	net_dev->priv_flags &= ~IFF_TX_SKB_SHARING;

	net_dev->features |= net_dev->hw_features;
	net_dev->vlan_features = net_dev->features;

	memcpy(net_dev->perm_addr, mac_addr, net_dev->addr_len);
	memcpy(net_dev->dev_addr, mac_addr, net_dev->addr_len);

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	net_dev->ethtool_ops = &dpaa_ethtool_ops;

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	net_dev->needed_headroom = priv->tx_headroom;
	net_dev->watchdog_timeo = msecs_to_jiffies(tx_timeout);

	/* start without the RUNNING flag, phylib controls it later */
	netif_carrier_off(net_dev);

	err = register_netdev(net_dev);
	if (err < 0) {
		dev_err(dev, "register_netdev() = %d\n", err);
		return err;
	}

	return 0;
}

static int dpaa_stop(struct net_device *net_dev)
{
	struct mac_device *mac_dev;
	struct dpaa_priv *priv;
	int i, err, error;

	priv = netdev_priv(net_dev);
	mac_dev = priv->mac_dev;

	netif_tx_stop_all_queues(net_dev);
	/* Allow the Fman (Tx) port to process in-flight frames before we
	 * try switching it off.
	 */
	usleep_range(5000, 10000);

	err = mac_dev->stop(mac_dev);
	if (err < 0)
		netif_err(priv, ifdown, net_dev, "mac_dev->stop() = %d\n",
			  err);

	for (i = 0; i < ARRAY_SIZE(mac_dev->port); i++) {
		error = fman_port_disable(mac_dev->port[i]);
		if (error)
			err = error;
	}

	if (net_dev->phydev)
		phy_disconnect(net_dev->phydev);
	net_dev->phydev = NULL;

	return err;
}

static void dpaa_tx_timeout(struct net_device *net_dev)
{
	struct dpaa_percpu_priv *percpu_priv;
	const struct dpaa_priv	*priv;

	priv = netdev_priv(net_dev);
	percpu_priv = this_cpu_ptr(priv->percpu_priv);

	netif_crit(priv, timer, net_dev, "Transmit timeout latency: %u ms\n",
		   jiffies_to_msecs(jiffies - dev_trans_start(net_dev)));

	percpu_priv->stats.tx_errors++;
}

/* Calculates the statistics for the given device by adding the statistics
 * collected by each CPU.
 */
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static void dpaa_get_stats64(struct net_device *net_dev,
			     struct rtnl_link_stats64 *s)
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{
	int numstats = sizeof(struct rtnl_link_stats64) / sizeof(u64);
	struct dpaa_priv *priv = netdev_priv(net_dev);
	struct dpaa_percpu_priv *percpu_priv;
	u64 *netstats = (u64 *)s;
	u64 *cpustats;
	int i, j;

	for_each_possible_cpu(i) {
		percpu_priv = per_cpu_ptr(priv->percpu_priv, i);

		cpustats = (u64 *)&percpu_priv->stats;

		/* add stats from all CPUs */
		for (j = 0; j < numstats; j++)
			netstats[j] += cpustats[j];
	}
}

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static int dpaa_setup_tc(struct net_device *net_dev, enum tc_setup_type type,
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			 void *type_data)
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{
	struct dpaa_priv *priv = netdev_priv(net_dev);
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	struct tc_mqprio_qopt *mqprio = type_data;
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	u8 num_tc;
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	int i;

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	if (type != TC_SETUP_MQPRIO)
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		return -EOPNOTSUPP;
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	mqprio->hw = TC_MQPRIO_HW_OFFLOAD_TCS;
	num_tc = mqprio->num_tc;
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	if (num_tc == priv->num_tc)
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		return 0;

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	if (!num_tc) {
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		netdev_reset_tc(net_dev);
		goto out;
	}

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	if (num_tc > DPAA_TC_NUM) {
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		netdev_err(net_dev, "Too many traffic classes: max %d supported.\n",
			   DPAA_TC_NUM);
		return -EINVAL;
	}

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	netdev_set_num_tc(net_dev, num_tc);
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	for (i = 0; i < num_tc; i++)
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		netdev_set_tc_queue(net_dev, i, DPAA_TC_TXQ_NUM,
				    i * DPAA_TC_TXQ_NUM);

out:
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	priv->num_tc = num_tc ? : 1;
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	netif_set_real_num_tx_queues(net_dev, priv->num_tc * DPAA_TC_TXQ_NUM);
	return 0;
}

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static struct mac_device *dpaa_mac_dev_get(struct platform_device *pdev)
{
	struct dpaa_eth_data *eth_data;
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	struct device *dpaa_dev;
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	struct mac_device *mac_dev;

	dpaa_dev = &pdev->dev;
	eth_data = dpaa_dev->platform_data;
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	if (!eth_data) {
		dev_err(dpaa_dev, "eth_data missing\n");
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		return ERR_PTR(-ENODEV);
	}
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	mac_dev = eth_data->mac_dev;
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	if (!mac_dev) {
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		dev_err(dpaa_dev, "mac_dev missing\n");
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		return ERR_PTR(-EINVAL);
	}

	return mac_dev;
}

static int dpaa_set_mac_address(struct net_device *net_dev, void *addr)
{
	const struct dpaa_priv *priv;
	struct mac_device *mac_dev;
	struct sockaddr old_addr;
	int err;

	priv = netdev_priv(net_dev);

	memcpy(old_addr.sa_data, net_dev->dev_addr,  ETH_ALEN);

	err = eth_mac_addr(net_dev, addr);
	if (err < 0) {
		netif_err(priv, drv, net_dev, "eth_mac_addr() = %d\n", err);
		return err;
	}

	mac_dev = priv->mac_dev;

	err = mac_dev->change_addr(mac_dev->fman_mac,
				   (enet_addr_t *)net_dev->dev_addr);
	if (err < 0) {
		netif_err(priv, drv, net_dev, "mac_dev->change_addr() = %d\n",
			  err);
		/* reverting to previous address */
		eth_mac_addr(net_dev, &old_addr);

		return err;
	}

	return 0;
}

static void dpaa_set_rx_mode(struct net_device *net_dev)
{
	const struct dpaa_priv	*priv;
	int err;

	priv = netdev_priv(net_dev);

	if (!!(net_dev->flags & IFF_PROMISC) != priv->mac_dev->promisc) {
		priv->mac_dev->promisc = !priv->mac_dev->promisc;
		err = priv->mac_dev->set_promisc(priv->mac_dev->fman_mac,
						 priv->mac_dev->promisc);
		if (err < 0)
			netif_err(priv, drv, net_dev,
				  "mac_dev->set_promisc() = %d\n",
				  err);
	}

	err = priv->mac_dev->set_multi(net_dev, priv->mac_dev);
	if (err < 0)
		netif_err(priv, drv, net_dev, "mac_dev->set_multi() = %d\n",
			  err);
}

static struct dpaa_bp *dpaa_bpid2pool(int bpid)
{
	if (WARN_ON(bpid < 0 || bpid >= BM_MAX_NUM_OF_POOLS))
		return NULL;

	return dpaa_bp_array[bpid];
}

/* checks if this bpool is already allocated */
static bool dpaa_bpid2pool_use(int bpid)
{
	if (dpaa_bpid2pool(bpid)) {
		atomic_inc(&dpaa_bp_array[bpid]->refs);
		return true;
	}

	return false;
}

/* called only once per bpid by dpaa_bp_alloc_pool() */
static void dpaa_bpid2pool_map(int bpid, struct dpaa_bp *dpaa_bp)
{
	dpaa_bp_array[bpid] = dpaa_bp;
	atomic_set(&dpaa_bp->refs, 1);
}

static int dpaa_bp_alloc_pool(struct dpaa_bp *dpaa_bp)
{
	int err;

	if (dpaa_bp->size == 0 || dpaa_bp->config_count == 0) {
		pr_err("%s: Buffer pool is not properly initialized! Missing size or initial number of buffers\n",
		       __func__);
		return -EINVAL;
	}

	/* If the pool is already specified, we only create one per bpid */
	if (dpaa_bp->bpid != FSL_DPAA_BPID_INV &&
	    dpaa_bpid2pool_use(dpaa_bp->bpid))
		return 0;

	if (dpaa_bp->bpid == FSL_DPAA_BPID_INV) {
		dpaa_bp->pool = bman_new_pool();
		if (!dpaa_bp->pool) {
			pr_err("%s: bman_new_pool() failed\n",
			       __func__);
			return -ENODEV;
		}

		dpaa_bp->bpid = (u8)bman_get_bpid(dpaa_bp->pool);
	}

	if (dpaa_bp->seed_cb) {
		err = dpaa_bp->seed_cb(dpaa_bp);
		if (err)
			goto pool_seed_failed;
	}

	dpaa_bpid2pool_map(dpaa_bp->bpid, dpaa_bp);

	return 0;

pool_seed_failed:
	pr_err("%s: pool seeding failed\n", __func__);
	bman_free_pool(dpaa_bp->pool);

	return err;
}

/* remove and free all the buffers from the given buffer pool */
static void dpaa_bp_drain(struct dpaa_bp *bp)
{
	u8 num = 8;
	int ret;

	do {
		struct bm_buffer bmb[8];
		int i;

		ret = bman_acquire(bp->pool, bmb, num);
		if (ret < 0) {
			if (num == 8) {
				/* we have less than 8 buffers left;
				 * drain them one by one
				 */
				num = 1;
				ret = 1;
				continue;
			} else {
				/* Pool is fully drained */
				break;
			}
		}

		if (bp->free_buf_cb)
			for (i = 0; i < num; i++)
				bp->free_buf_cb(bp, &bmb[i]);
	} while (ret > 0);
}

static void dpaa_bp_free(struct dpaa_bp *dpaa_bp)
{
	struct dpaa_bp *bp = dpaa_bpid2pool(dpaa_bp->bpid);

	/* the mapping between bpid and dpaa_bp is done very late in the
	 * allocation procedure; if something failed before the mapping, the bp
	 * was not configured, therefore we don't need the below instructions
	 */
	if (!bp)
		return;

	if (!atomic_dec_and_test(&bp->refs))
		return;

	if (bp->free_buf_cb)
		dpaa_bp_drain(bp);

	dpaa_bp_array[bp->bpid] = NULL;
	bman_free_pool(bp->pool);
}

static void dpaa_bps_free(struct dpaa_priv *priv)
{
	int i;

	for (i = 0; i < DPAA_BPS_NUM; i++)
		dpaa_bp_free(priv->dpaa_bps[i]);
}

/* Use multiple WQs for FQ assignment:
 *	- Tx Confirmation queues go to WQ1.
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 *	- Rx Error and Tx Error queues go to WQ5 (giving them a better chance
 *	  to be scheduled, in case there are many more FQs in WQ6).
 *	- Rx Default goes to WQ6.
 *	- Tx queues go to different WQs depending on their priority. Equal
 *	  chunks of NR_CPUS queues go to WQ6 (lowest priority), WQ2, WQ1 and
 *	  WQ0 (highest priority).
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 * This ensures that Tx-confirmed buffers are timely released. In particular,
 * it avoids congestion on the Tx Confirm FQs, which can pile up PFDRs if they
 * are greatly outnumbered by other FQs in the system, while
 * dequeue scheduling is round-robin.
 */
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static inline void dpaa_assign_wq(struct dpaa_fq *fq, int idx)
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{
	switch (fq->fq_type) {
	case FQ_TYPE_TX_CONFIRM:
	case FQ_TYPE_TX_CONF_MQ:
		fq->wq = 1;
		break;
	case FQ_TYPE_RX_ERROR:
	case FQ_TYPE_TX_ERROR:
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		fq->wq = 5;
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		break;
	case FQ_TYPE_RX_DEFAULT:
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	case FQ_TYPE_RX_PCD:
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		fq->wq = 6;
		break;
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	case FQ_TYPE_TX:
621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641
		switch (idx / DPAA_TC_TXQ_NUM) {
		case 0:
			/* Low priority (best effort) */
			fq->wq = 6;
			break;
		case 1:
			/* Medium priority */
			fq->wq = 2;
			break;
		case 2:
			/* High priority */
			fq->wq = 1;
			break;
		case 3:
			/* Very high priority */
			fq->wq = 0;
			break;
		default:
			WARN(1, "Too many TX FQs: more than %d!\n",
			     DPAA_ETH_TXQ_NUM);
		}
642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668
		break;
	default:
		WARN(1, "Invalid FQ type %d for FQID %d!\n",
		     fq->fq_type, fq->fqid);
	}
}

static struct dpaa_fq *dpaa_fq_alloc(struct device *dev,
				     u32 start, u32 count,
				     struct list_head *list,
				     enum dpaa_fq_type fq_type)
{
	struct dpaa_fq *dpaa_fq;
	int i;

	dpaa_fq = devm_kzalloc(dev, sizeof(*dpaa_fq) * count,
			       GFP_KERNEL);
	if (!dpaa_fq)
		return NULL;

	for (i = 0; i < count; i++) {
		dpaa_fq[i].fq_type = fq_type;
		dpaa_fq[i].fqid = start ? start + i : 0;
		list_add_tail(&dpaa_fq[i].list, list);
	}

	for (i = 0; i < count; i++)
669
		dpaa_assign_wq(dpaa_fq + i, i);
670 671 672 673 674 675 676 677

	return dpaa_fq;
}

static int dpaa_alloc_all_fqs(struct device *dev, struct list_head *list,
			      struct fm_port_fqs *port_fqs)
{
	struct dpaa_fq *dpaa_fq;
678
	u32 fq_base, fq_base_aligned, i;
679 680 681 682 683 684 685 686 687 688 689 690 691

	dpaa_fq = dpaa_fq_alloc(dev, 0, 1, list, FQ_TYPE_RX_ERROR);
	if (!dpaa_fq)
		goto fq_alloc_failed;

	port_fqs->rx_errq = &dpaa_fq[0];

	dpaa_fq = dpaa_fq_alloc(dev, 0, 1, list, FQ_TYPE_RX_DEFAULT);
	if (!dpaa_fq)
		goto fq_alloc_failed;

	port_fqs->rx_defq = &dpaa_fq[0];

692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711
	/* the PCD FQIDs range needs to be aligned for correct operation */
	if (qman_alloc_fqid_range(&fq_base, 2 * DPAA_ETH_PCD_RXQ_NUM))
		goto fq_alloc_failed;

	fq_base_aligned = ALIGN(fq_base, DPAA_ETH_PCD_RXQ_NUM);

	for (i = fq_base; i < fq_base_aligned; i++)
		qman_release_fqid(i);

	for (i = fq_base_aligned + DPAA_ETH_PCD_RXQ_NUM;
	     i < (fq_base + 2 * DPAA_ETH_PCD_RXQ_NUM); i++)
		qman_release_fqid(i);

	dpaa_fq = dpaa_fq_alloc(dev, fq_base_aligned, DPAA_ETH_PCD_RXQ_NUM,
				list, FQ_TYPE_RX_PCD);
	if (!dpaa_fq)
		goto fq_alloc_failed;

	port_fqs->rx_pcdq = &dpaa_fq[0];

712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786
	if (!dpaa_fq_alloc(dev, 0, DPAA_ETH_TXQ_NUM, list, FQ_TYPE_TX_CONF_MQ))
		goto fq_alloc_failed;

	dpaa_fq = dpaa_fq_alloc(dev, 0, 1, list, FQ_TYPE_TX_ERROR);
	if (!dpaa_fq)
		goto fq_alloc_failed;

	port_fqs->tx_errq = &dpaa_fq[0];

	dpaa_fq = dpaa_fq_alloc(dev, 0, 1, list, FQ_TYPE_TX_CONFIRM);
	if (!dpaa_fq)
		goto fq_alloc_failed;

	port_fqs->tx_defq = &dpaa_fq[0];

	if (!dpaa_fq_alloc(dev, 0, DPAA_ETH_TXQ_NUM, list, FQ_TYPE_TX))
		goto fq_alloc_failed;

	return 0;

fq_alloc_failed:
	dev_err(dev, "dpaa_fq_alloc() failed\n");
	return -ENOMEM;
}

static u32 rx_pool_channel;
static DEFINE_SPINLOCK(rx_pool_channel_init);

static int dpaa_get_channel(void)
{
	spin_lock(&rx_pool_channel_init);
	if (!rx_pool_channel) {
		u32 pool;
		int ret;

		ret = qman_alloc_pool(&pool);

		if (!ret)
			rx_pool_channel = pool;
	}
	spin_unlock(&rx_pool_channel_init);
	if (!rx_pool_channel)
		return -ENOMEM;
	return rx_pool_channel;
}

static void dpaa_release_channel(void)
{
	qman_release_pool(rx_pool_channel);
}

static void dpaa_eth_add_channel(u16 channel)
{
	u32 pool = QM_SDQCR_CHANNELS_POOL_CONV(channel);
	const cpumask_t *cpus = qman_affine_cpus();
	struct qman_portal *portal;
	int cpu;

	for_each_cpu(cpu, cpus) {
		portal = qman_get_affine_portal(cpu);
		qman_p_static_dequeue_add(portal, pool);
	}
}

/* Congestion group state change notification callback.
 * Stops the device's egress queues while they are congested and
 * wakes them upon exiting congested state.
 * Also updates some CGR-related stats.
 */
static void dpaa_eth_cgscn(struct qman_portal *qm, struct qman_cgr *cgr,
			   int congested)
{
	struct dpaa_priv *priv = (struct dpaa_priv *)container_of(cgr,
		struct dpaa_priv, cgr_data.cgr);

M
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	if (congested) {
		priv->cgr_data.congestion_start_jiffies = jiffies;
789
		netif_tx_stop_all_queues(priv->net_dev);
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		priv->cgr_data.cgr_congested_count++;
	} else {
		priv->cgr_data.congested_jiffies +=
			(jiffies - priv->cgr_data.congestion_start_jiffies);
794
		netif_tx_wake_all_queues(priv->net_dev);
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	}
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}

static int dpaa_eth_cgr_init(struct dpaa_priv *priv)
{
	struct qm_mcc_initcgr initcgr;
	u32 cs_th;
	int err;

	err = qman_alloc_cgrid(&priv->cgr_data.cgr.cgrid);
	if (err < 0) {
		if (netif_msg_drv(priv))
			pr_err("%s: Error %d allocating CGR ID\n",
			       __func__, err);
		goto out_error;
	}
	priv->cgr_data.cgr.cb = dpaa_eth_cgscn;

	/* Enable Congestion State Change Notifications and CS taildrop */
814
	memset(&initcgr, 0, sizeof(initcgr));
815
	initcgr.we_mask = cpu_to_be16(QM_CGR_WE_CSCN_EN | QM_CGR_WE_CS_THRES);
816 817 818 819 820 821 822 823 824 825 826 827 828
	initcgr.cgr.cscn_en = QM_CGR_EN;

	/* Set different thresholds based on the MAC speed.
	 * This may turn suboptimal if the MAC is reconfigured at a speed
	 * lower than its max, e.g. if a dTSEC later negotiates a 100Mbps link.
	 * In such cases, we ought to reconfigure the threshold, too.
	 */
	if (priv->mac_dev->if_support & SUPPORTED_10000baseT_Full)
		cs_th = DPAA_CS_THRESHOLD_10G;
	else
		cs_th = DPAA_CS_THRESHOLD_1G;
	qm_cgr_cs_thres_set64(&initcgr.cgr.cs_thres, cs_th, 1);

829
	initcgr.we_mask |= cpu_to_be16(QM_CGR_WE_CSTD_EN);
830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880
	initcgr.cgr.cstd_en = QM_CGR_EN;

	err = qman_create_cgr(&priv->cgr_data.cgr, QMAN_CGR_FLAG_USE_INIT,
			      &initcgr);
	if (err < 0) {
		if (netif_msg_drv(priv))
			pr_err("%s: Error %d creating CGR with ID %d\n",
			       __func__, err, priv->cgr_data.cgr.cgrid);
		qman_release_cgrid(priv->cgr_data.cgr.cgrid);
		goto out_error;
	}
	if (netif_msg_drv(priv))
		pr_debug("Created CGR %d for netdev with hwaddr %pM on QMan channel %d\n",
			 priv->cgr_data.cgr.cgrid, priv->mac_dev->addr,
			 priv->cgr_data.cgr.chan);

out_error:
	return err;
}

static inline void dpaa_setup_ingress(const struct dpaa_priv *priv,
				      struct dpaa_fq *fq,
				      const struct qman_fq *template)
{
	fq->fq_base = *template;
	fq->net_dev = priv->net_dev;

	fq->flags = QMAN_FQ_FLAG_NO_ENQUEUE;
	fq->channel = priv->channel;
}

static inline void dpaa_setup_egress(const struct dpaa_priv *priv,
				     struct dpaa_fq *fq,
				     struct fman_port *port,
				     const struct qman_fq *template)
{
	fq->fq_base = *template;
	fq->net_dev = priv->net_dev;

	if (port) {
		fq->flags = QMAN_FQ_FLAG_TO_DCPORTAL;
		fq->channel = (u16)fman_port_get_qman_channel_id(port);
	} else {
		fq->flags = QMAN_FQ_FLAG_NO_MODIFY;
	}
}

static void dpaa_fq_setup(struct dpaa_priv *priv,
			  const struct dpaa_fq_cbs *fq_cbs,
			  struct fman_port *tx_port)
{
881
	int egress_cnt = 0, conf_cnt = 0, num_portals = 0, portal_cnt = 0, cpu;
882
	const cpumask_t *affine_cpus = qman_affine_cpus();
883
	u16 channels[NR_CPUS];
884 885 886
	struct dpaa_fq *fq;

	for_each_cpu(cpu, affine_cpus)
887 888
		channels[num_portals++] = qman_affine_channel(cpu);

889 890 891 892 893 894 895 896 897 898 899 900 901
	if (num_portals == 0)
		dev_err(priv->net_dev->dev.parent,
			"No Qman software (affine) channels found");

	/* Initialize each FQ in the list */
	list_for_each_entry(fq, &priv->dpaa_fq_list, list) {
		switch (fq->fq_type) {
		case FQ_TYPE_RX_DEFAULT:
			dpaa_setup_ingress(priv, fq, &fq_cbs->rx_defq);
			break;
		case FQ_TYPE_RX_ERROR:
			dpaa_setup_ingress(priv, fq, &fq_cbs->rx_errq);
			break;
902 903 904 905 906 907
		case FQ_TYPE_RX_PCD:
			if (!num_portals)
				continue;
			dpaa_setup_ingress(priv, fq, &fq_cbs->rx_defq);
			fq->channel = channels[portal_cnt++ % num_portals];
			break;
908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984
		case FQ_TYPE_TX:
			dpaa_setup_egress(priv, fq, tx_port,
					  &fq_cbs->egress_ern);
			/* If we have more Tx queues than the number of cores,
			 * just ignore the extra ones.
			 */
			if (egress_cnt < DPAA_ETH_TXQ_NUM)
				priv->egress_fqs[egress_cnt++] = &fq->fq_base;
			break;
		case FQ_TYPE_TX_CONF_MQ:
			priv->conf_fqs[conf_cnt++] = &fq->fq_base;
			/* fall through */
		case FQ_TYPE_TX_CONFIRM:
			dpaa_setup_ingress(priv, fq, &fq_cbs->tx_defq);
			break;
		case FQ_TYPE_TX_ERROR:
			dpaa_setup_ingress(priv, fq, &fq_cbs->tx_errq);
			break;
		default:
			dev_warn(priv->net_dev->dev.parent,
				 "Unknown FQ type detected!\n");
			break;
		}
	}

	 /* Make sure all CPUs receive a corresponding Tx queue. */
	while (egress_cnt < DPAA_ETH_TXQ_NUM) {
		list_for_each_entry(fq, &priv->dpaa_fq_list, list) {
			if (fq->fq_type != FQ_TYPE_TX)
				continue;
			priv->egress_fqs[egress_cnt++] = &fq->fq_base;
			if (egress_cnt == DPAA_ETH_TXQ_NUM)
				break;
		}
	}
}

static inline int dpaa_tx_fq_to_id(const struct dpaa_priv *priv,
				   struct qman_fq *tx_fq)
{
	int i;

	for (i = 0; i < DPAA_ETH_TXQ_NUM; i++)
		if (priv->egress_fqs[i] == tx_fq)
			return i;

	return -EINVAL;
}

static int dpaa_fq_init(struct dpaa_fq *dpaa_fq, bool td_enable)
{
	const struct dpaa_priv	*priv;
	struct qman_fq *confq = NULL;
	struct qm_mcc_initfq initfq;
	struct device *dev;
	struct qman_fq *fq;
	int queue_id;
	int err;

	priv = netdev_priv(dpaa_fq->net_dev);
	dev = dpaa_fq->net_dev->dev.parent;

	if (dpaa_fq->fqid == 0)
		dpaa_fq->flags |= QMAN_FQ_FLAG_DYNAMIC_FQID;

	dpaa_fq->init = !(dpaa_fq->flags & QMAN_FQ_FLAG_NO_MODIFY);

	err = qman_create_fq(dpaa_fq->fqid, dpaa_fq->flags, &dpaa_fq->fq_base);
	if (err) {
		dev_err(dev, "qman_create_fq() failed\n");
		return err;
	}
	fq = &dpaa_fq->fq_base;

	if (dpaa_fq->init) {
		memset(&initfq, 0, sizeof(initfq));

985
		initfq.we_mask = cpu_to_be16(QM_INITFQ_WE_FQCTRL);
986
		/* Note: we may get to keep an empty FQ in cache */
987
		initfq.fqd.fq_ctrl = cpu_to_be16(QM_FQCTRL_PREFERINCACHE);
988 989 990 991 992

		/* Try to reduce the number of portal interrupts for
		 * Tx Confirmation FQs.
		 */
		if (dpaa_fq->fq_type == FQ_TYPE_TX_CONFIRM)
993
			initfq.fqd.fq_ctrl |= cpu_to_be16(QM_FQCTRL_AVOIDBLOCK);
994 995

		/* FQ placement */
996
		initfq.we_mask |= cpu_to_be16(QM_INITFQ_WE_DESTWQ);
997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008

		qm_fqd_set_destwq(&initfq.fqd, dpaa_fq->channel, dpaa_fq->wq);

		/* Put all egress queues in a congestion group of their own.
		 * Sensu stricto, the Tx confirmation queues are Rx FQs,
		 * rather than Tx - but they nonetheless account for the
		 * memory footprint on behalf of egress traffic. We therefore
		 * place them in the netdev's CGR, along with the Tx FQs.
		 */
		if (dpaa_fq->fq_type == FQ_TYPE_TX ||
		    dpaa_fq->fq_type == FQ_TYPE_TX_CONFIRM ||
		    dpaa_fq->fq_type == FQ_TYPE_TX_CONF_MQ) {
1009 1010
			initfq.we_mask |= cpu_to_be16(QM_INITFQ_WE_CGID);
			initfq.fqd.fq_ctrl |= cpu_to_be16(QM_FQCTRL_CGE);
1011 1012 1013 1014 1015 1016 1017 1018 1019 1020
			initfq.fqd.cgid = (u8)priv->cgr_data.cgr.cgrid;
			/* Set a fixed overhead accounting, in an attempt to
			 * reduce the impact of fixed-size skb shells and the
			 * driver's needed headroom on system memory. This is
			 * especially the case when the egress traffic is
			 * composed of small datagrams.
			 * Unfortunately, QMan's OAL value is capped to an
			 * insufficient value, but even that is better than
			 * no overhead accounting at all.
			 */
1021
			initfq.we_mask |= cpu_to_be16(QM_INITFQ_WE_OAC);
1022 1023 1024 1025 1026 1027 1028 1029
			qm_fqd_set_oac(&initfq.fqd, QM_OAC_CG);
			qm_fqd_set_oal(&initfq.fqd,
				       min(sizeof(struct sk_buff) +
				       priv->tx_headroom,
				       (size_t)FSL_QMAN_MAX_OAL));
		}

		if (td_enable) {
1030
			initfq.we_mask |= cpu_to_be16(QM_INITFQ_WE_TDTHRESH);
1031
			qm_fqd_set_taildrop(&initfq.fqd, DPAA_FQ_TD, 1);
1032
			initfq.fqd.fq_ctrl = cpu_to_be16(QM_FQCTRL_TDE);
1033 1034 1035 1036 1037 1038 1039
		}

		if (dpaa_fq->fq_type == FQ_TYPE_TX) {
			queue_id = dpaa_tx_fq_to_id(priv, &dpaa_fq->fq_base);
			if (queue_id >= 0)
				confq = priv->conf_fqs[queue_id];
			if (confq) {
1040 1041
				initfq.we_mask |=
					cpu_to_be16(QM_INITFQ_WE_CONTEXTA);
1042 1043 1044 1045 1046 1047 1048
			/* ContextA: OVOM=1(use contextA2 bits instead of ICAD)
			 *	     A2V=1 (contextA A2 field is valid)
			 *	     A0V=1 (contextA A0 field is valid)
			 *	     B0V=1 (contextB field is valid)
			 * ContextA A2: EBD=1 (deallocate buffers inside FMan)
			 * ContextB B0(ASPID): 0 (absolute Virtual Storage ID)
			 */
1049 1050
				qm_fqd_context_a_set64(&initfq.fqd,
						       0x1e00000080000000ULL);
1051 1052 1053 1054 1055 1056
			}
		}

		/* Put all the ingress queues in our "ingress CGR". */
		if (priv->use_ingress_cgr &&
		    (dpaa_fq->fq_type == FQ_TYPE_RX_DEFAULT ||
1057 1058
		     dpaa_fq->fq_type == FQ_TYPE_RX_ERROR ||
		     dpaa_fq->fq_type == FQ_TYPE_RX_PCD)) {
1059 1060
			initfq.we_mask |= cpu_to_be16(QM_INITFQ_WE_CGID);
			initfq.fqd.fq_ctrl |= cpu_to_be16(QM_FQCTRL_CGE);
1061 1062 1063 1064
			initfq.fqd.cgid = (u8)priv->ingress_cgr.cgrid;
			/* Set a fixed overhead accounting, just like for the
			 * egress CGR.
			 */
1065
			initfq.we_mask |= cpu_to_be16(QM_INITFQ_WE_OAC);
1066 1067 1068 1069 1070 1071 1072 1073 1074
			qm_fqd_set_oac(&initfq.fqd, QM_OAC_CG);
			qm_fqd_set_oal(&initfq.fqd,
				       min(sizeof(struct sk_buff) +
				       priv->tx_headroom,
				       (size_t)FSL_QMAN_MAX_OAL));
		}

		/* Initialization common to all ingress queues */
		if (dpaa_fq->flags & QMAN_FQ_FLAG_NO_ENQUEUE) {
1075
			initfq.we_mask |= cpu_to_be16(QM_INITFQ_WE_CONTEXTA);
1076 1077
			initfq.fqd.fq_ctrl |= cpu_to_be16(QM_FQCTRL_HOLDACTIVE |
						QM_FQCTRL_CTXASTASHING);
1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146
			initfq.fqd.context_a.stashing.exclusive =
				QM_STASHING_EXCL_DATA | QM_STASHING_EXCL_CTX |
				QM_STASHING_EXCL_ANNOTATION;
			qm_fqd_set_stashing(&initfq.fqd, 1, 2,
					    DIV_ROUND_UP(sizeof(struct qman_fq),
							 64));
		}

		err = qman_init_fq(fq, QMAN_INITFQ_FLAG_SCHED, &initfq);
		if (err < 0) {
			dev_err(dev, "qman_init_fq(%u) = %d\n",
				qman_fq_fqid(fq), err);
			qman_destroy_fq(fq);
			return err;
		}
	}

	dpaa_fq->fqid = qman_fq_fqid(fq);

	return 0;
}

static int dpaa_fq_free_entry(struct device *dev, struct qman_fq *fq)
{
	const struct dpaa_priv  *priv;
	struct dpaa_fq *dpaa_fq;
	int err, error;

	err = 0;

	dpaa_fq = container_of(fq, struct dpaa_fq, fq_base);
	priv = netdev_priv(dpaa_fq->net_dev);

	if (dpaa_fq->init) {
		err = qman_retire_fq(fq, NULL);
		if (err < 0 && netif_msg_drv(priv))
			dev_err(dev, "qman_retire_fq(%u) = %d\n",
				qman_fq_fqid(fq), err);

		error = qman_oos_fq(fq);
		if (error < 0 && netif_msg_drv(priv)) {
			dev_err(dev, "qman_oos_fq(%u) = %d\n",
				qman_fq_fqid(fq), error);
			if (err >= 0)
				err = error;
		}
	}

	qman_destroy_fq(fq);
	list_del(&dpaa_fq->list);

	return err;
}

static int dpaa_fq_free(struct device *dev, struct list_head *list)
{
	struct dpaa_fq *dpaa_fq, *tmp;
	int err, error;

	err = 0;
	list_for_each_entry_safe(dpaa_fq, tmp, list, list) {
		error = dpaa_fq_free_entry(dev, (struct qman_fq *)dpaa_fq);
		if (error < 0 && err >= 0)
			err = error;
	}

	return err;
}

1147 1148 1149
static int dpaa_eth_init_tx_port(struct fman_port *port, struct dpaa_fq *errq,
				 struct dpaa_fq *defq,
				 struct dpaa_buffer_layout *buf_layout)
1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167
{
	struct fman_buffer_prefix_content buf_prefix_content;
	struct fman_port_params params;
	int err;

	memset(&params, 0, sizeof(params));
	memset(&buf_prefix_content, 0, sizeof(buf_prefix_content));

	buf_prefix_content.priv_data_size = buf_layout->priv_data_size;
	buf_prefix_content.pass_prs_result = true;
	buf_prefix_content.pass_hash_result = true;
	buf_prefix_content.pass_time_stamp = false;
	buf_prefix_content.data_align = DPAA_FD_DATA_ALIGNMENT;

	params.specific_params.non_rx_params.err_fqid = errq->fqid;
	params.specific_params.non_rx_params.dflt_fqid = defq->fqid;

	err = fman_port_config(port, &params);
1168
	if (err) {
1169
		pr_err("%s: fman_port_config failed\n", __func__);
1170 1171
		return err;
	}
1172 1173

	err = fman_port_cfg_buf_prefix_content(port, &buf_prefix_content);
1174
	if (err) {
1175 1176
		pr_err("%s: fman_port_cfg_buf_prefix_content failed\n",
		       __func__);
1177 1178
		return err;
	}
1179 1180 1181 1182

	err = fman_port_init(port);
	if (err)
		pr_err("%s: fm_port_init failed\n", __func__);
1183 1184

	return err;
1185 1186
}

1187 1188
static int dpaa_eth_init_rx_port(struct fman_port *port, struct dpaa_bp **bps,
				 size_t count, struct dpaa_fq *errq,
1189
				 struct dpaa_fq *defq, struct dpaa_fq *pcdq,
1190
				 struct dpaa_buffer_layout *buf_layout)
1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208
{
	struct fman_buffer_prefix_content buf_prefix_content;
	struct fman_port_rx_params *rx_p;
	struct fman_port_params params;
	int i, err;

	memset(&params, 0, sizeof(params));
	memset(&buf_prefix_content, 0, sizeof(buf_prefix_content));

	buf_prefix_content.priv_data_size = buf_layout->priv_data_size;
	buf_prefix_content.pass_prs_result = true;
	buf_prefix_content.pass_hash_result = true;
	buf_prefix_content.pass_time_stamp = false;
	buf_prefix_content.data_align = DPAA_FD_DATA_ALIGNMENT;

	rx_p = &params.specific_params.rx_params;
	rx_p->err_fqid = errq->fqid;
	rx_p->dflt_fqid = defq->fqid;
1209 1210 1211 1212
	if (pcdq) {
		rx_p->pcd_base_fqid = pcdq->fqid;
		rx_p->pcd_fqs_count = DPAA_ETH_PCD_RXQ_NUM;
	}
1213 1214 1215 1216 1217 1218 1219 1220 1221

	count = min(ARRAY_SIZE(rx_p->ext_buf_pools.ext_buf_pool), count);
	rx_p->ext_buf_pools.num_of_pools_used = (u8)count;
	for (i = 0; i < count; i++) {
		rx_p->ext_buf_pools.ext_buf_pool[i].id =  bps[i]->bpid;
		rx_p->ext_buf_pools.ext_buf_pool[i].size = (u16)bps[i]->size;
	}

	err = fman_port_config(port, &params);
1222
	if (err) {
1223
		pr_err("%s: fman_port_config failed\n", __func__);
1224 1225
		return err;
	}
1226 1227

	err = fman_port_cfg_buf_prefix_content(port, &buf_prefix_content);
1228
	if (err) {
1229 1230
		pr_err("%s: fman_port_cfg_buf_prefix_content failed\n",
		       __func__);
1231 1232
		return err;
	}
1233 1234 1235 1236

	err = fman_port_init(port);
	if (err)
		pr_err("%s: fm_port_init failed\n", __func__);
1237 1238

	return err;
1239 1240
}

1241 1242 1243 1244 1245
static int dpaa_eth_init_ports(struct mac_device *mac_dev,
			       struct dpaa_bp **bps, size_t count,
			       struct fm_port_fqs *port_fqs,
			       struct dpaa_buffer_layout *buf_layout,
			       struct device *dev)
1246 1247 1248
{
	struct fman_port *rxport = mac_dev->port[RX];
	struct fman_port *txport = mac_dev->port[TX];
1249
	int err;
1250

1251 1252 1253 1254 1255 1256
	err = dpaa_eth_init_tx_port(txport, port_fqs->tx_errq,
				    port_fqs->tx_defq, &buf_layout[TX]);
	if (err)
		return err;

	err = dpaa_eth_init_rx_port(rxport, bps, count, port_fqs->rx_errq,
1257 1258
				    port_fqs->rx_defq, port_fqs->rx_pcdq,
				    &buf_layout[RX]);
1259 1260

	return err;
1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341
}

static int dpaa_bman_release(const struct dpaa_bp *dpaa_bp,
			     struct bm_buffer *bmb, int cnt)
{
	int err;

	err = bman_release(dpaa_bp->pool, bmb, cnt);
	/* Should never occur, address anyway to avoid leaking the buffers */
	if (unlikely(WARN_ON(err)) && dpaa_bp->free_buf_cb)
		while (cnt-- > 0)
			dpaa_bp->free_buf_cb(dpaa_bp, &bmb[cnt]);

	return cnt;
}

static void dpaa_release_sgt_members(struct qm_sg_entry *sgt)
{
	struct bm_buffer bmb[DPAA_BUFF_RELEASE_MAX];
	struct dpaa_bp *dpaa_bp;
	int i = 0, j;

	memset(bmb, 0, sizeof(bmb));

	do {
		dpaa_bp = dpaa_bpid2pool(sgt[i].bpid);
		if (!dpaa_bp)
			return;

		j = 0;
		do {
			WARN_ON(qm_sg_entry_is_ext(&sgt[i]));

			bm_buffer_set64(&bmb[j], qm_sg_entry_get64(&sgt[i]));

			j++; i++;
		} while (j < ARRAY_SIZE(bmb) &&
				!qm_sg_entry_is_final(&sgt[i - 1]) &&
				sgt[i - 1].bpid == sgt[i].bpid);

		dpaa_bman_release(dpaa_bp, bmb, j);
	} while (!qm_sg_entry_is_final(&sgt[i - 1]));
}

static void dpaa_fd_release(const struct net_device *net_dev,
			    const struct qm_fd *fd)
{
	struct qm_sg_entry *sgt;
	struct dpaa_bp *dpaa_bp;
	struct bm_buffer bmb;
	dma_addr_t addr;
	void *vaddr;

	bmb.data = 0;
	bm_buffer_set64(&bmb, qm_fd_addr(fd));

	dpaa_bp = dpaa_bpid2pool(fd->bpid);
	if (!dpaa_bp)
		return;

	if (qm_fd_get_format(fd) == qm_fd_sg) {
		vaddr = phys_to_virt(qm_fd_addr(fd));
		sgt = vaddr + qm_fd_get_offset(fd);

		dma_unmap_single(dpaa_bp->dev, qm_fd_addr(fd), dpaa_bp->size,
				 DMA_FROM_DEVICE);

		dpaa_release_sgt_members(sgt);

		addr = dma_map_single(dpaa_bp->dev, vaddr, dpaa_bp->size,
				      DMA_FROM_DEVICE);
		if (dma_mapping_error(dpaa_bp->dev, addr)) {
			dev_err(dpaa_bp->dev, "DMA mapping failed");
			return;
		}
		bm_buffer_set64(&bmb, addr);
	}

	dpaa_bman_release(dpaa_bp, &bmb, 1);
}

M
Madalin Bucur 已提交
1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372
static void count_ern(struct dpaa_percpu_priv *percpu_priv,
		      const union qm_mr_entry *msg)
{
	switch (msg->ern.rc & QM_MR_RC_MASK) {
	case QM_MR_RC_CGR_TAILDROP:
		percpu_priv->ern_cnt.cg_tdrop++;
		break;
	case QM_MR_RC_WRED:
		percpu_priv->ern_cnt.wred++;
		break;
	case QM_MR_RC_ERROR:
		percpu_priv->ern_cnt.err_cond++;
		break;
	case QM_MR_RC_ORPWINDOW_EARLY:
		percpu_priv->ern_cnt.early_window++;
		break;
	case QM_MR_RC_ORPWINDOW_LATE:
		percpu_priv->ern_cnt.late_window++;
		break;
	case QM_MR_RC_FQ_TAILDROP:
		percpu_priv->ern_cnt.fq_tdrop++;
		break;
	case QM_MR_RC_ORPWINDOW_RETIRED:
		percpu_priv->ern_cnt.fq_retired++;
		break;
	case QM_MR_RC_ORP_ZERO:
		percpu_priv->ern_cnt.orp_zero++;
		break;
	}
}

1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463
/* Turn on HW checksum computation for this outgoing frame.
 * If the current protocol is not something we support in this regard
 * (or if the stack has already computed the SW checksum), we do nothing.
 *
 * Returns 0 if all goes well (or HW csum doesn't apply), and a negative value
 * otherwise.
 *
 * Note that this function may modify the fd->cmd field and the skb data buffer
 * (the Parse Results area).
 */
static int dpaa_enable_tx_csum(struct dpaa_priv *priv,
			       struct sk_buff *skb,
			       struct qm_fd *fd,
			       char *parse_results)
{
	struct fman_prs_result *parse_result;
	u16 ethertype = ntohs(skb->protocol);
	struct ipv6hdr *ipv6h = NULL;
	struct iphdr *iph;
	int retval = 0;
	u8 l4_proto;

	if (skb->ip_summed != CHECKSUM_PARTIAL)
		return 0;

	/* Note: L3 csum seems to be already computed in sw, but we can't choose
	 * L4 alone from the FM configuration anyway.
	 */

	/* Fill in some fields of the Parse Results array, so the FMan
	 * can find them as if they came from the FMan Parser.
	 */
	parse_result = (struct fman_prs_result *)parse_results;

	/* If we're dealing with VLAN, get the real Ethernet type */
	if (ethertype == ETH_P_8021Q) {
		/* We can't always assume the MAC header is set correctly
		 * by the stack, so reset to beginning of skb->data
		 */
		skb_reset_mac_header(skb);
		ethertype = ntohs(vlan_eth_hdr(skb)->h_vlan_encapsulated_proto);
	}

	/* Fill in the relevant L3 parse result fields
	 * and read the L4 protocol type
	 */
	switch (ethertype) {
	case ETH_P_IP:
		parse_result->l3r = cpu_to_be16(FM_L3_PARSE_RESULT_IPV4);
		iph = ip_hdr(skb);
		WARN_ON(!iph);
		l4_proto = iph->protocol;
		break;
	case ETH_P_IPV6:
		parse_result->l3r = cpu_to_be16(FM_L3_PARSE_RESULT_IPV6);
		ipv6h = ipv6_hdr(skb);
		WARN_ON(!ipv6h);
		l4_proto = ipv6h->nexthdr;
		break;
	default:
		/* We shouldn't even be here */
		if (net_ratelimit())
			netif_alert(priv, tx_err, priv->net_dev,
				    "Can't compute HW csum for L3 proto 0x%x\n",
				    ntohs(skb->protocol));
		retval = -EIO;
		goto return_error;
	}

	/* Fill in the relevant L4 parse result fields */
	switch (l4_proto) {
	case IPPROTO_UDP:
		parse_result->l4r = FM_L4_PARSE_RESULT_UDP;
		break;
	case IPPROTO_TCP:
		parse_result->l4r = FM_L4_PARSE_RESULT_TCP;
		break;
	default:
		if (net_ratelimit())
			netif_alert(priv, tx_err, priv->net_dev,
				    "Can't compute HW csum for L4 proto 0x%x\n",
				    l4_proto);
		retval = -EIO;
		goto return_error;
	}

	/* At index 0 is IPOffset_1 as defined in the Parse Results */
	parse_result->ip_off[0] = (u8)skb_network_offset(skb);
	parse_result->l4_off = (u8)skb_transport_offset(skb);

	/* Enable L3 (and L4, if TCP or UDP) HW checksum. */
1464
	fd->cmd |= cpu_to_be32(FM_FD_CMD_RPD | FM_FD_CMD_DTC);
1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640

	/* On P1023 and similar platforms fd->cmd interpretation could
	 * be disabled by setting CONTEXT_A bit ICMD; currently this bit
	 * is not set so we do not need to check; in the future, if/when
	 * using context_a we need to check this bit
	 */

return_error:
	return retval;
}

static int dpaa_bp_add_8_bufs(const struct dpaa_bp *dpaa_bp)
{
	struct device *dev = dpaa_bp->dev;
	struct bm_buffer bmb[8];
	dma_addr_t addr;
	void *new_buf;
	u8 i;

	for (i = 0; i < 8; i++) {
		new_buf = netdev_alloc_frag(dpaa_bp->raw_size);
		if (unlikely(!new_buf)) {
			dev_err(dev, "netdev_alloc_frag() failed, size %zu\n",
				dpaa_bp->raw_size);
			goto release_previous_buffs;
		}
		new_buf = PTR_ALIGN(new_buf, SMP_CACHE_BYTES);

		addr = dma_map_single(dev, new_buf,
				      dpaa_bp->size, DMA_FROM_DEVICE);
		if (unlikely(dma_mapping_error(dev, addr))) {
			dev_err(dpaa_bp->dev, "DMA map failed");
			goto release_previous_buffs;
		}

		bmb[i].data = 0;
		bm_buffer_set64(&bmb[i], addr);
	}

release_bufs:
	return dpaa_bman_release(dpaa_bp, bmb, i);

release_previous_buffs:
	WARN_ONCE(1, "dpaa_eth: failed to add buffers on Rx\n");

	bm_buffer_set64(&bmb[i], 0);
	/* Avoid releasing a completely null buffer; bman_release() requires
	 * at least one buffer.
	 */
	if (likely(i))
		goto release_bufs;

	return 0;
}

static int dpaa_bp_seed(struct dpaa_bp *dpaa_bp)
{
	int i;

	/* Give each CPU an allotment of "config_count" buffers */
	for_each_possible_cpu(i) {
		int *count_ptr = per_cpu_ptr(dpaa_bp->percpu_count, i);
		int j;

		/* Although we access another CPU's counters here
		 * we do it at boot time so it is safe
		 */
		for (j = 0; j < dpaa_bp->config_count; j += 8)
			*count_ptr += dpaa_bp_add_8_bufs(dpaa_bp);
	}
	return 0;
}

/* Add buffers/(pages) for Rx processing whenever bpool count falls below
 * REFILL_THRESHOLD.
 */
static int dpaa_eth_refill_bpool(struct dpaa_bp *dpaa_bp, int *countptr)
{
	int count = *countptr;
	int new_bufs;

	if (unlikely(count < FSL_DPAA_ETH_REFILL_THRESHOLD)) {
		do {
			new_bufs = dpaa_bp_add_8_bufs(dpaa_bp);
			if (unlikely(!new_bufs)) {
				/* Avoid looping forever if we've temporarily
				 * run out of memory. We'll try again at the
				 * next NAPI cycle.
				 */
				break;
			}
			count += new_bufs;
		} while (count < FSL_DPAA_ETH_MAX_BUF_COUNT);

		*countptr = count;
		if (unlikely(count < FSL_DPAA_ETH_MAX_BUF_COUNT))
			return -ENOMEM;
	}

	return 0;
}

static int dpaa_eth_refill_bpools(struct dpaa_priv *priv)
{
	struct dpaa_bp *dpaa_bp;
	int *countptr;
	int res, i;

	for (i = 0; i < DPAA_BPS_NUM; i++) {
		dpaa_bp = priv->dpaa_bps[i];
		if (!dpaa_bp)
			return -EINVAL;
		countptr = this_cpu_ptr(dpaa_bp->percpu_count);
		res  = dpaa_eth_refill_bpool(dpaa_bp, countptr);
		if (res)
			return res;
	}
	return 0;
}

/* Cleanup function for outgoing frame descriptors that were built on Tx path,
 * either contiguous frames or scatter/gather ones.
 * Skb freeing is not handled here.
 *
 * This function may be called on error paths in the Tx function, so guard
 * against cases when not all fd relevant fields were filled in.
 *
 * Return the skb backpointer, since for S/G frames the buffer containing it
 * gets freed here.
 */
static struct sk_buff *dpaa_cleanup_tx_fd(const struct dpaa_priv *priv,
					  const struct qm_fd *fd)
{
	const enum dma_data_direction dma_dir = DMA_TO_DEVICE;
	struct device *dev = priv->net_dev->dev.parent;
	dma_addr_t addr = qm_fd_addr(fd);
	const struct qm_sg_entry *sgt;
	struct sk_buff **skbh, *skb;
	int nr_frags, i;

	skbh = (struct sk_buff **)phys_to_virt(addr);
	skb = *skbh;

	if (unlikely(qm_fd_get_format(fd) == qm_fd_sg)) {
		nr_frags = skb_shinfo(skb)->nr_frags;
		dma_unmap_single(dev, addr, qm_fd_get_offset(fd) +
				 sizeof(struct qm_sg_entry) * (1 + nr_frags),
				 dma_dir);

		/* The sgt buffer has been allocated with netdev_alloc_frag(),
		 * it's from lowmem.
		 */
		sgt = phys_to_virt(addr + qm_fd_get_offset(fd));

		/* sgt[0] is from lowmem, was dma_map_single()-ed */
		dma_unmap_single(dev, qm_sg_addr(&sgt[0]),
				 qm_sg_entry_get_len(&sgt[0]), dma_dir);

		/* remaining pages were mapped with skb_frag_dma_map() */
		for (i = 1; i < nr_frags; i++) {
			WARN_ON(qm_sg_entry_is_ext(&sgt[i]));

			dma_unmap_page(dev, qm_sg_addr(&sgt[i]),
				       qm_sg_entry_get_len(&sgt[i]), dma_dir);
		}

		/* Free the page frag that we allocated on Tx */
		skb_free_frag(phys_to_virt(addr));
	} else {
		dma_unmap_single(dev, addr,
				 skb_tail_pointer(skb) - (u8 *)skbh, dma_dir);
	}

	return skb;
}

1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657
static u8 rx_csum_offload(const struct dpaa_priv *priv, const struct qm_fd *fd)
{
	/* The parser has run and performed L4 checksum validation.
	 * We know there were no parser errors (and implicitly no
	 * L4 csum error), otherwise we wouldn't be here.
	 */
	if ((priv->net_dev->features & NETIF_F_RXCSUM) &&
	    (be32_to_cpu(fd->status) & FM_FD_STAT_L4CV))
		return CHECKSUM_UNNECESSARY;

	/* We're here because either the parser didn't run or the L4 checksum
	 * was not verified. This may include the case of a UDP frame with
	 * checksum zero or an L4 proto other than TCP/UDP
	 */
	return CHECKSUM_NONE;
}

1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687
/* Build a linear skb around the received buffer.
 * We are guaranteed there is enough room at the end of the data buffer to
 * accommodate the shared info area of the skb.
 */
static struct sk_buff *contig_fd_to_skb(const struct dpaa_priv *priv,
					const struct qm_fd *fd)
{
	ssize_t fd_off = qm_fd_get_offset(fd);
	dma_addr_t addr = qm_fd_addr(fd);
	struct dpaa_bp *dpaa_bp;
	struct sk_buff *skb;
	void *vaddr;

	vaddr = phys_to_virt(addr);
	WARN_ON(!IS_ALIGNED((unsigned long)vaddr, SMP_CACHE_BYTES));

	dpaa_bp = dpaa_bpid2pool(fd->bpid);
	if (!dpaa_bp)
		goto free_buffer;

	skb = build_skb(vaddr, dpaa_bp->size +
			SKB_DATA_ALIGN(sizeof(struct skb_shared_info)));
	if (unlikely(!skb)) {
		WARN_ONCE(1, "Build skb failure on Rx\n");
		goto free_buffer;
	}
	WARN_ON(fd_off != priv->rx_headroom);
	skb_reserve(skb, fd_off);
	skb_put(skb, qm_fd_get_length(fd));

1688
	skb->ip_summed = rx_csum_offload(priv, fd);
1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747

	return skb;

free_buffer:
	skb_free_frag(vaddr);
	return NULL;
}

/* Build an skb with the data of the first S/G entry in the linear portion and
 * the rest of the frame as skb fragments.
 *
 * The page fragment holding the S/G Table is recycled here.
 */
static struct sk_buff *sg_fd_to_skb(const struct dpaa_priv *priv,
				    const struct qm_fd *fd)
{
	ssize_t fd_off = qm_fd_get_offset(fd);
	dma_addr_t addr = qm_fd_addr(fd);
	const struct qm_sg_entry *sgt;
	struct page *page, *head_page;
	struct dpaa_bp *dpaa_bp;
	void *vaddr, *sg_vaddr;
	int frag_off, frag_len;
	struct sk_buff *skb;
	dma_addr_t sg_addr;
	int page_offset;
	unsigned int sz;
	int *count_ptr;
	int i;

	vaddr = phys_to_virt(addr);
	WARN_ON(!IS_ALIGNED((unsigned long)vaddr, SMP_CACHE_BYTES));

	/* Iterate through the SGT entries and add data buffers to the skb */
	sgt = vaddr + fd_off;
	for (i = 0; i < DPAA_SGT_MAX_ENTRIES; i++) {
		/* Extension bit is not supported */
		WARN_ON(qm_sg_entry_is_ext(&sgt[i]));

		sg_addr = qm_sg_addr(&sgt[i]);
		sg_vaddr = phys_to_virt(sg_addr);
		WARN_ON(!IS_ALIGNED((unsigned long)sg_vaddr,
				    SMP_CACHE_BYTES));

		/* We may use multiple Rx pools */
		dpaa_bp = dpaa_bpid2pool(sgt[i].bpid);
		if (!dpaa_bp)
			goto free_buffers;

		count_ptr = this_cpu_ptr(dpaa_bp->percpu_count);
		dma_unmap_single(dpaa_bp->dev, sg_addr, dpaa_bp->size,
				 DMA_FROM_DEVICE);
		if (i == 0) {
			sz = dpaa_bp->size +
				SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
			skb = build_skb(sg_vaddr, sz);
			if (WARN_ON(unlikely(!skb)))
				goto free_buffers;

1748
			skb->ip_summed = rx_csum_offload(priv, fd);
1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797

			/* Make sure forwarded skbs will have enough space
			 * on Tx, if extra headers are added.
			 */
			WARN_ON(fd_off != priv->rx_headroom);
			skb_reserve(skb, fd_off);
			skb_put(skb, qm_sg_entry_get_len(&sgt[i]));
		} else {
			/* Not the first S/G entry; all data from buffer will
			 * be added in an skb fragment; fragment index is offset
			 * by one since first S/G entry was incorporated in the
			 * linear part of the skb.
			 *
			 * Caution: 'page' may be a tail page.
			 */
			page = virt_to_page(sg_vaddr);
			head_page = virt_to_head_page(sg_vaddr);

			/* Compute offset in (possibly tail) page */
			page_offset = ((unsigned long)sg_vaddr &
					(PAGE_SIZE - 1)) +
				(page_address(page) - page_address(head_page));
			/* page_offset only refers to the beginning of sgt[i];
			 * but the buffer itself may have an internal offset.
			 */
			frag_off = qm_sg_entry_get_off(&sgt[i]) + page_offset;
			frag_len = qm_sg_entry_get_len(&sgt[i]);
			/* skb_add_rx_frag() does no checking on the page; if
			 * we pass it a tail page, we'll end up with
			 * bad page accounting and eventually with segafults.
			 */
			skb_add_rx_frag(skb, i - 1, head_page, frag_off,
					frag_len, dpaa_bp->size);
		}
		/* Update the pool count for the current {cpu x bpool} */
		(*count_ptr)--;

		if (qm_sg_entry_is_final(&sgt[i]))
			break;
	}
	WARN_ONCE(i == DPAA_SGT_MAX_ENTRIES, "No final bit on SGT\n");

	/* free the SG table buffer */
	skb_free_frag(vaddr);

	return skb;

free_buffers:
	/* compensate sw bpool counter changes */
D
Dan Carpenter 已提交
1798
	for (i--; i >= 0; i--) {
1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862
		dpaa_bp = dpaa_bpid2pool(sgt[i].bpid);
		if (dpaa_bp) {
			count_ptr = this_cpu_ptr(dpaa_bp->percpu_count);
			(*count_ptr)++;
		}
	}
	/* free all the SG entries */
	for (i = 0; i < DPAA_SGT_MAX_ENTRIES ; i++) {
		sg_addr = qm_sg_addr(&sgt[i]);
		sg_vaddr = phys_to_virt(sg_addr);
		skb_free_frag(sg_vaddr);
		dpaa_bp = dpaa_bpid2pool(sgt[i].bpid);
		if (dpaa_bp) {
			count_ptr = this_cpu_ptr(dpaa_bp->percpu_count);
			(*count_ptr)--;
		}

		if (qm_sg_entry_is_final(&sgt[i]))
			break;
	}
	/* free the SGT fragment */
	skb_free_frag(vaddr);

	return NULL;
}

static int skb_to_contig_fd(struct dpaa_priv *priv,
			    struct sk_buff *skb, struct qm_fd *fd,
			    int *offset)
{
	struct net_device *net_dev = priv->net_dev;
	struct device *dev = net_dev->dev.parent;
	enum dma_data_direction dma_dir;
	unsigned char *buffer_start;
	struct sk_buff **skbh;
	dma_addr_t addr;
	int err;

	/* We are guaranteed to have at least tx_headroom bytes
	 * available, so just use that for offset.
	 */
	fd->bpid = FSL_DPAA_BPID_INV;
	buffer_start = skb->data - priv->tx_headroom;
	dma_dir = DMA_TO_DEVICE;

	skbh = (struct sk_buff **)buffer_start;
	*skbh = skb;

	/* Enable L3/L4 hardware checksum computation.
	 *
	 * We must do this before dma_map_single(DMA_TO_DEVICE), because we may
	 * need to write into the skb.
	 */
	err = dpaa_enable_tx_csum(priv, skb, fd,
				  ((char *)skbh) + DPAA_TX_PRIV_DATA_SIZE);
	if (unlikely(err < 0)) {
		if (net_ratelimit())
			netif_err(priv, tx_err, net_dev, "HW csum error: %d\n",
				  err);
		return err;
	}

	/* Fill in the rest of the FD fields */
	qm_fd_set_contig(fd, priv->tx_headroom, skb->len);
1863
	fd->cmd |= cpu_to_be32(FM_FD_CMD_FCO);
1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970

	/* Map the entire buffer size that may be seen by FMan, but no more */
	addr = dma_map_single(dev, skbh,
			      skb_tail_pointer(skb) - buffer_start, dma_dir);
	if (unlikely(dma_mapping_error(dev, addr))) {
		if (net_ratelimit())
			netif_err(priv, tx_err, net_dev, "dma_map_single() failed\n");
		return -EINVAL;
	}
	qm_fd_addr_set64(fd, addr);

	return 0;
}

static int skb_to_sg_fd(struct dpaa_priv *priv,
			struct sk_buff *skb, struct qm_fd *fd)
{
	const enum dma_data_direction dma_dir = DMA_TO_DEVICE;
	const int nr_frags = skb_shinfo(skb)->nr_frags;
	struct net_device *net_dev = priv->net_dev;
	struct device *dev = net_dev->dev.parent;
	struct qm_sg_entry *sgt;
	struct sk_buff **skbh;
	int i, j, err, sz;
	void *buffer_start;
	skb_frag_t *frag;
	dma_addr_t addr;
	size_t frag_len;
	void *sgt_buf;

	/* get a page frag to store the SGTable */
	sz = SKB_DATA_ALIGN(priv->tx_headroom +
		sizeof(struct qm_sg_entry) * (1 + nr_frags));
	sgt_buf = netdev_alloc_frag(sz);
	if (unlikely(!sgt_buf)) {
		netdev_err(net_dev, "netdev_alloc_frag() failed for size %d\n",
			   sz);
		return -ENOMEM;
	}

	/* Enable L3/L4 hardware checksum computation.
	 *
	 * We must do this before dma_map_single(DMA_TO_DEVICE), because we may
	 * need to write into the skb.
	 */
	err = dpaa_enable_tx_csum(priv, skb, fd,
				  sgt_buf + DPAA_TX_PRIV_DATA_SIZE);
	if (unlikely(err < 0)) {
		if (net_ratelimit())
			netif_err(priv, tx_err, net_dev, "HW csum error: %d\n",
				  err);
		goto csum_failed;
	}

	sgt = (struct qm_sg_entry *)(sgt_buf + priv->tx_headroom);
	qm_sg_entry_set_len(&sgt[0], skb_headlen(skb));
	sgt[0].bpid = FSL_DPAA_BPID_INV;
	sgt[0].offset = 0;
	addr = dma_map_single(dev, skb->data,
			      skb_headlen(skb), dma_dir);
	if (unlikely(dma_mapping_error(dev, addr))) {
		dev_err(dev, "DMA mapping failed");
		err = -EINVAL;
		goto sg0_map_failed;
	}
	qm_sg_entry_set64(&sgt[0], addr);

	/* populate the rest of SGT entries */
	frag = &skb_shinfo(skb)->frags[0];
	frag_len = frag->size;
	for (i = 1; i <= nr_frags; i++, frag++) {
		WARN_ON(!skb_frag_page(frag));
		addr = skb_frag_dma_map(dev, frag, 0,
					frag_len, dma_dir);
		if (unlikely(dma_mapping_error(dev, addr))) {
			dev_err(dev, "DMA mapping failed");
			err = -EINVAL;
			goto sg_map_failed;
		}

		qm_sg_entry_set_len(&sgt[i], frag_len);
		sgt[i].bpid = FSL_DPAA_BPID_INV;
		sgt[i].offset = 0;

		/* keep the offset in the address */
		qm_sg_entry_set64(&sgt[i], addr);
		frag_len = frag->size;
	}
	qm_sg_entry_set_f(&sgt[i - 1], frag_len);

	qm_fd_set_sg(fd, priv->tx_headroom, skb->len);

	/* DMA map the SGT page */
	buffer_start = (void *)sgt - priv->tx_headroom;
	skbh = (struct sk_buff **)buffer_start;
	*skbh = skb;

	addr = dma_map_single(dev, buffer_start, priv->tx_headroom +
			      sizeof(struct qm_sg_entry) * (1 + nr_frags),
			      dma_dir);
	if (unlikely(dma_mapping_error(dev, addr))) {
		dev_err(dev, "DMA mapping failed");
		err = -EINVAL;
		goto sgt_map_failed;
	}

	fd->bpid = FSL_DPAA_BPID_INV;
1971
	fd->cmd |= cpu_to_be32(FM_FD_CMD_FCO);
1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997
	qm_fd_addr_set64(fd, addr);

	return 0;

sgt_map_failed:
sg_map_failed:
	for (j = 0; j < i; j++)
		dma_unmap_page(dev, qm_sg_addr(&sgt[j]),
			       qm_sg_entry_get_len(&sgt[j]), dma_dir);
sg0_map_failed:
csum_failed:
	skb_free_frag(sgt_buf);

	return err;
}

static inline int dpaa_xmit(struct dpaa_priv *priv,
			    struct rtnl_link_stats64 *percpu_stats,
			    int queue,
			    struct qm_fd *fd)
{
	struct qman_fq *egress_fq;
	int err, i;

	egress_fq = priv->egress_fqs[queue];
	if (fd->bpid == FSL_DPAA_BPID_INV)
1998
		fd->cmd |= cpu_to_be32(qman_fq_fqid(priv->conf_fqs[queue]));
1999

M
Madalin Bucur 已提交
2000 2001 2002
	/* Trace this Tx fd */
	trace_dpaa_tx_fd(priv->net_dev, egress_fq, fd);

2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057
	for (i = 0; i < DPAA_ENQUEUE_RETRIES; i++) {
		err = qman_enqueue(egress_fq, fd);
		if (err != -EBUSY)
			break;
	}

	if (unlikely(err < 0)) {
		percpu_stats->tx_errors++;
		percpu_stats->tx_fifo_errors++;
		return err;
	}

	percpu_stats->tx_packets++;
	percpu_stats->tx_bytes += qm_fd_get_length(fd);

	return 0;
}

static int dpaa_start_xmit(struct sk_buff *skb, struct net_device *net_dev)
{
	const int queue_mapping = skb_get_queue_mapping(skb);
	bool nonlinear = skb_is_nonlinear(skb);
	struct rtnl_link_stats64 *percpu_stats;
	struct dpaa_percpu_priv *percpu_priv;
	struct dpaa_priv *priv;
	struct qm_fd fd;
	int offset = 0;
	int err = 0;

	priv = netdev_priv(net_dev);
	percpu_priv = this_cpu_ptr(priv->percpu_priv);
	percpu_stats = &percpu_priv->stats;

	qm_fd_clear_fd(&fd);

	if (!nonlinear) {
		/* We're going to store the skb backpointer at the beginning
		 * of the data buffer, so we need a privately owned skb
		 *
		 * We've made sure skb is not shared in dev->priv_flags,
		 * we need to verify the skb head is not cloned
		 */
		if (skb_cow_head(skb, priv->tx_headroom))
			goto enomem;

		WARN_ON(skb_is_nonlinear(skb));
	}

	/* MAX_SKB_FRAGS is equal or larger than our dpaa_SGT_MAX_ENTRIES;
	 * make sure we don't feed FMan with more fragments than it supports.
	 */
	if (nonlinear &&
	    likely(skb_shinfo(skb)->nr_frags < DPAA_SGT_MAX_ENTRIES)) {
		/* Just create a S/G fd based on the skb */
		err = skb_to_sg_fd(priv, skb, &fd);
M
Madalin Bucur 已提交
2058
		percpu_priv->tx_frag_skbuffs++;
2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090
	} else {
		/* If the egress skb contains more fragments than we support
		 * we have no choice but to linearize it ourselves.
		 */
		if (unlikely(nonlinear) && __skb_linearize(skb))
			goto enomem;

		/* Finally, create a contig FD from this skb */
		err = skb_to_contig_fd(priv, skb, &fd, &offset);
	}
	if (unlikely(err < 0))
		goto skb_to_fd_failed;

	if (likely(dpaa_xmit(priv, percpu_stats, queue_mapping, &fd) == 0))
		return NETDEV_TX_OK;

	dpaa_cleanup_tx_fd(priv, &fd);
skb_to_fd_failed:
enomem:
	percpu_stats->tx_errors++;
	dev_kfree_skb(skb);
	return NETDEV_TX_OK;
}

static void dpaa_rx_error(struct net_device *net_dev,
			  const struct dpaa_priv *priv,
			  struct dpaa_percpu_priv *percpu_priv,
			  const struct qm_fd *fd,
			  u32 fqid)
{
	if (net_ratelimit())
		netif_err(priv, hw, net_dev, "Err FD status = 0x%08x\n",
2091
			  be32_to_cpu(fd->status) & FM_FD_STAT_RX_ERRORS);
2092 2093 2094

	percpu_priv->stats.rx_errors++;

2095
	if (be32_to_cpu(fd->status) & FM_FD_ERR_DMA)
M
Madalin Bucur 已提交
2096
		percpu_priv->rx_errors.dme++;
2097
	if (be32_to_cpu(fd->status) & FM_FD_ERR_PHYSICAL)
M
Madalin Bucur 已提交
2098
		percpu_priv->rx_errors.fpe++;
2099
	if (be32_to_cpu(fd->status) & FM_FD_ERR_SIZE)
M
Madalin Bucur 已提交
2100
		percpu_priv->rx_errors.fse++;
2101
	if (be32_to_cpu(fd->status) & FM_FD_ERR_PRS_HDR_ERR)
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Madalin Bucur 已提交
2102 2103
		percpu_priv->rx_errors.phe++;

2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116
	dpaa_fd_release(net_dev, fd);
}

static void dpaa_tx_error(struct net_device *net_dev,
			  const struct dpaa_priv *priv,
			  struct dpaa_percpu_priv *percpu_priv,
			  const struct qm_fd *fd,
			  u32 fqid)
{
	struct sk_buff *skb;

	if (net_ratelimit())
		netif_warn(priv, hw, net_dev, "FD status = 0x%08x\n",
2117
			   be32_to_cpu(fd->status) & FM_FD_STAT_TX_ERRORS);
2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132

	percpu_priv->stats.tx_errors++;

	skb = dpaa_cleanup_tx_fd(priv, fd);
	dev_kfree_skb(skb);
}

static int dpaa_eth_poll(struct napi_struct *napi, int budget)
{
	struct dpaa_napi_portal *np =
			container_of(napi, struct dpaa_napi_portal, napi);

	int cleaned = qman_p_poll_dqrr(np->p, budget);

	if (cleaned < budget) {
2133
		napi_complete_done(napi, cleaned);
2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150
		qman_p_irqsource_add(np->p, QM_PIRQ_DQRI);

	} else if (np->down) {
		qman_p_irqsource_add(np->p, QM_PIRQ_DQRI);
	}

	return cleaned;
}

static void dpaa_tx_conf(struct net_device *net_dev,
			 const struct dpaa_priv *priv,
			 struct dpaa_percpu_priv *percpu_priv,
			 const struct qm_fd *fd,
			 u32 fqid)
{
	struct sk_buff	*skb;

2151
	if (unlikely(be32_to_cpu(fd->status) & FM_FD_STAT_TX_ERRORS)) {
2152 2153
		if (net_ratelimit())
			netif_warn(priv, hw, net_dev, "FD status = 0x%08x\n",
2154 2155
				   be32_to_cpu(fd->status) &
				   FM_FD_STAT_TX_ERRORS);
2156 2157 2158 2159

		percpu_priv->stats.tx_errors++;
	}

M
Madalin Bucur 已提交
2160 2161
	percpu_priv->tx_confirm++;

2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175
	skb = dpaa_cleanup_tx_fd(priv, fd);

	consume_skb(skb);
}

static inline int dpaa_eth_napi_schedule(struct dpaa_percpu_priv *percpu_priv,
					 struct qman_portal *portal)
{
	if (unlikely(in_irq() || !in_serving_softirq())) {
		/* Disable QMan IRQ and invoke NAPI */
		qman_p_irqsource_remove(portal, QM_PIRQ_DQRI);

		percpu_priv->np.p = portal;
		napi_schedule(&percpu_priv->np.napi);
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Madalin Bucur 已提交
2176
		percpu_priv->in_interrupt++;
2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224
		return 1;
	}
	return 0;
}

static enum qman_cb_dqrr_result rx_error_dqrr(struct qman_portal *portal,
					      struct qman_fq *fq,
					      const struct qm_dqrr_entry *dq)
{
	struct dpaa_fq *dpaa_fq = container_of(fq, struct dpaa_fq, fq_base);
	struct dpaa_percpu_priv *percpu_priv;
	struct net_device *net_dev;
	struct dpaa_bp *dpaa_bp;
	struct dpaa_priv *priv;

	net_dev = dpaa_fq->net_dev;
	priv = netdev_priv(net_dev);
	dpaa_bp = dpaa_bpid2pool(dq->fd.bpid);
	if (!dpaa_bp)
		return qman_cb_dqrr_consume;

	percpu_priv = this_cpu_ptr(priv->percpu_priv);

	if (dpaa_eth_napi_schedule(percpu_priv, portal))
		return qman_cb_dqrr_stop;

	if (dpaa_eth_refill_bpools(priv))
		/* Unable to refill the buffer pool due to insufficient
		 * system memory. Just release the frame back into the pool,
		 * otherwise we'll soon end up with an empty buffer pool.
		 */
		dpaa_fd_release(net_dev, &dq->fd);
	else
		dpaa_rx_error(net_dev, priv, percpu_priv, &dq->fd, fq->fqid);

	return qman_cb_dqrr_consume;
}

static enum qman_cb_dqrr_result rx_default_dqrr(struct qman_portal *portal,
						struct qman_fq *fq,
						const struct qm_dqrr_entry *dq)
{
	struct rtnl_link_stats64 *percpu_stats;
	struct dpaa_percpu_priv *percpu_priv;
	const struct qm_fd *fd = &dq->fd;
	dma_addr_t addr = qm_fd_addr(fd);
	enum qm_fd_format fd_format;
	struct net_device *net_dev;
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Madalin Bucur 已提交
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	u32 fd_status, hash_offset;
2226 2227 2228 2229 2230
	struct dpaa_bp *dpaa_bp;
	struct dpaa_priv *priv;
	unsigned int skb_len;
	struct sk_buff *skb;
	int *count_ptr;
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Madalin Bucur 已提交
2231
	void *vaddr;
2232

2233 2234
	fd_status = be32_to_cpu(fd->status);
	fd_format = qm_fd_get_format(fd);
2235 2236 2237 2238 2239 2240
	net_dev = ((struct dpaa_fq *)fq)->net_dev;
	priv = netdev_priv(net_dev);
	dpaa_bp = dpaa_bpid2pool(dq->fd.bpid);
	if (!dpaa_bp)
		return qman_cb_dqrr_consume;

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Madalin Bucur 已提交
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	/* Trace the Rx fd */
	trace_dpaa_rx_fd(net_dev, fq, &dq->fd);

2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276
	percpu_priv = this_cpu_ptr(priv->percpu_priv);
	percpu_stats = &percpu_priv->stats;

	if (unlikely(dpaa_eth_napi_schedule(percpu_priv, portal)))
		return qman_cb_dqrr_stop;

	/* Make sure we didn't run out of buffers */
	if (unlikely(dpaa_eth_refill_bpools(priv))) {
		/* Unable to refill the buffer pool due to insufficient
		 * system memory. Just release the frame back into the pool,
		 * otherwise we'll soon end up with an empty buffer pool.
		 */
		dpaa_fd_release(net_dev, &dq->fd);
		return qman_cb_dqrr_consume;
	}

	if (unlikely(fd_status & FM_FD_STAT_RX_ERRORS) != 0) {
		if (net_ratelimit())
			netif_warn(priv, hw, net_dev, "FD status = 0x%08x\n",
				   fd_status & FM_FD_STAT_RX_ERRORS);

		percpu_stats->rx_errors++;
		dpaa_fd_release(net_dev, fd);
		return qman_cb_dqrr_consume;
	}

	dpaa_bp = dpaa_bpid2pool(fd->bpid);
	if (!dpaa_bp)
		return qman_cb_dqrr_consume;

	dma_unmap_single(dpaa_bp->dev, addr, dpaa_bp->size, DMA_FROM_DEVICE);

	/* prefetch the first 64 bytes of the frame or the SGT start */
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	vaddr = phys_to_virt(addr);
	prefetch(vaddr + qm_fd_get_offset(fd));
2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298

	fd_format = qm_fd_get_format(fd);
	/* The only FD types that we may receive are contig and S/G */
	WARN_ON((fd_format != qm_fd_contig) && (fd_format != qm_fd_sg));

	/* Account for either the contig buffer or the SGT buffer (depending on
	 * which case we were in) having been removed from the pool.
	 */
	count_ptr = this_cpu_ptr(dpaa_bp->percpu_count);
	(*count_ptr)--;

	if (likely(fd_format == qm_fd_contig))
		skb = contig_fd_to_skb(priv, fd);
	else
		skb = sg_fd_to_skb(priv, fd);
	if (!skb)
		return qman_cb_dqrr_consume;

	skb->protocol = eth_type_trans(skb, net_dev);

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2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310
	if (net_dev->features & NETIF_F_RXHASH && priv->keygen_in_use &&
	    !fman_port_get_hash_result_offset(priv->mac_dev->port[RX],
					      &hash_offset)) {
		enum pkt_hash_types type;

		/* if L4 exists, it was used in the hash generation */
		type = be32_to_cpu(fd->status) & FM_FD_STAT_L4CV ?
			PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3;
		skb_set_hash(skb, be32_to_cpu(*(u32 *)(vaddr + hash_offset)),
			     type);
	}

2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353
	skb_len = skb->len;

	if (unlikely(netif_receive_skb(skb) == NET_RX_DROP))
		return qman_cb_dqrr_consume;

	percpu_stats->rx_packets++;
	percpu_stats->rx_bytes += skb_len;

	return qman_cb_dqrr_consume;
}

static enum qman_cb_dqrr_result conf_error_dqrr(struct qman_portal *portal,
						struct qman_fq *fq,
						const struct qm_dqrr_entry *dq)
{
	struct dpaa_percpu_priv *percpu_priv;
	struct net_device *net_dev;
	struct dpaa_priv *priv;

	net_dev = ((struct dpaa_fq *)fq)->net_dev;
	priv = netdev_priv(net_dev);

	percpu_priv = this_cpu_ptr(priv->percpu_priv);

	if (dpaa_eth_napi_schedule(percpu_priv, portal))
		return qman_cb_dqrr_stop;

	dpaa_tx_error(net_dev, priv, percpu_priv, &dq->fd, fq->fqid);

	return qman_cb_dqrr_consume;
}

static enum qman_cb_dqrr_result conf_dflt_dqrr(struct qman_portal *portal,
					       struct qman_fq *fq,
					       const struct qm_dqrr_entry *dq)
{
	struct dpaa_percpu_priv *percpu_priv;
	struct net_device *net_dev;
	struct dpaa_priv *priv;

	net_dev = ((struct dpaa_fq *)fq)->net_dev;
	priv = netdev_priv(net_dev);

M
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	/* Trace the fd */
	trace_dpaa_tx_conf_fd(net_dev, fq, &dq->fd);

2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382
	percpu_priv = this_cpu_ptr(priv->percpu_priv);

	if (dpaa_eth_napi_schedule(percpu_priv, portal))
		return qman_cb_dqrr_stop;

	dpaa_tx_conf(net_dev, priv, percpu_priv, &dq->fd, fq->fqid);

	return qman_cb_dqrr_consume;
}

static void egress_ern(struct qman_portal *portal,
		       struct qman_fq *fq,
		       const union qm_mr_entry *msg)
{
	const struct qm_fd *fd = &msg->ern.fd;
	struct dpaa_percpu_priv *percpu_priv;
	const struct dpaa_priv *priv;
	struct net_device *net_dev;
	struct sk_buff *skb;

	net_dev = ((struct dpaa_fq *)fq)->net_dev;
	priv = netdev_priv(net_dev);
	percpu_priv = this_cpu_ptr(priv->percpu_priv);

	percpu_priv->stats.tx_dropped++;
	percpu_priv->stats.tx_fifo_errors++;
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2383
	count_ern(percpu_priv, msg);
2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422

	skb = dpaa_cleanup_tx_fd(priv, fd);
	dev_kfree_skb_any(skb);
}

static const struct dpaa_fq_cbs dpaa_fq_cbs = {
	.rx_defq = { .cb = { .dqrr = rx_default_dqrr } },
	.tx_defq = { .cb = { .dqrr = conf_dflt_dqrr } },
	.rx_errq = { .cb = { .dqrr = rx_error_dqrr } },
	.tx_errq = { .cb = { .dqrr = conf_error_dqrr } },
	.egress_ern = { .cb = { .ern = egress_ern } }
};

static void dpaa_eth_napi_enable(struct dpaa_priv *priv)
{
	struct dpaa_percpu_priv *percpu_priv;
	int i;

	for_each_possible_cpu(i) {
		percpu_priv = per_cpu_ptr(priv->percpu_priv, i);

		percpu_priv->np.down = 0;
		napi_enable(&percpu_priv->np.napi);
	}
}

static void dpaa_eth_napi_disable(struct dpaa_priv *priv)
{
	struct dpaa_percpu_priv *percpu_priv;
	int i;

	for_each_possible_cpu(i) {
		percpu_priv = per_cpu_ptr(priv->percpu_priv, i);

		percpu_priv->np.down = 1;
		napi_disable(&percpu_priv->np.napi);
	}
}

2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460
static void dpaa_adjust_link(struct net_device *net_dev)
{
	struct mac_device *mac_dev;
	struct dpaa_priv *priv;

	priv = netdev_priv(net_dev);
	mac_dev = priv->mac_dev;
	mac_dev->adjust_link(mac_dev);
}

static int dpaa_phy_init(struct net_device *net_dev)
{
	struct mac_device *mac_dev;
	struct phy_device *phy_dev;
	struct dpaa_priv *priv;

	priv = netdev_priv(net_dev);
	mac_dev = priv->mac_dev;

	phy_dev = of_phy_connect(net_dev, mac_dev->phy_node,
				 &dpaa_adjust_link, 0,
				 mac_dev->phy_if);
	if (!phy_dev) {
		netif_err(priv, ifup, net_dev, "init_phy() failed\n");
		return -ENODEV;
	}

	/* Remove any features not supported by the controller */
	phy_dev->supported &= mac_dev->if_support;
	phy_dev->supported |= (SUPPORTED_Pause | SUPPORTED_Asym_Pause);
	phy_dev->advertising = phy_dev->supported;

	mac_dev->phy_dev = phy_dev;
	net_dev->phydev = phy_dev;

	return 0;
}

2461 2462 2463 2464 2465 2466 2467 2468 2469 2470
static int dpaa_open(struct net_device *net_dev)
{
	struct mac_device *mac_dev;
	struct dpaa_priv *priv;
	int err, i;

	priv = netdev_priv(net_dev);
	mac_dev = priv->mac_dev;
	dpaa_eth_napi_enable(priv);

2471 2472
	err = dpaa_phy_init(net_dev);
	if (err)
2473
		goto phy_init_failed;
2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494

	for (i = 0; i < ARRAY_SIZE(mac_dev->port); i++) {
		err = fman_port_enable(mac_dev->port[i]);
		if (err)
			goto mac_start_failed;
	}

	err = priv->mac_dev->start(mac_dev);
	if (err < 0) {
		netif_err(priv, ifup, net_dev, "mac_dev->start() = %d\n", err);
		goto mac_start_failed;
	}

	netif_tx_start_all_queues(net_dev);

	return 0;

mac_start_failed:
	for (i = 0; i < ARRAY_SIZE(mac_dev->port); i++)
		fman_port_disable(mac_dev->port[i]);

2495
phy_init_failed:
2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513
	dpaa_eth_napi_disable(priv);

	return err;
}

static int dpaa_eth_stop(struct net_device *net_dev)
{
	struct dpaa_priv *priv;
	int err;

	err = dpaa_stop(net_dev);

	priv = netdev_priv(net_dev);
	dpaa_eth_napi_disable(priv);

	return err;
}

2514 2515 2516 2517 2518 2519 2520
static int dpaa_ioctl(struct net_device *net_dev, struct ifreq *rq, int cmd)
{
	if (!net_dev->phydev)
		return -EINVAL;
	return phy_mii_ioctl(net_dev->phydev, rq, cmd);
}

2521 2522 2523 2524 2525 2526 2527 2528 2529
static const struct net_device_ops dpaa_ops = {
	.ndo_open = dpaa_open,
	.ndo_start_xmit = dpaa_start_xmit,
	.ndo_stop = dpaa_eth_stop,
	.ndo_tx_timeout = dpaa_tx_timeout,
	.ndo_get_stats64 = dpaa_get_stats64,
	.ndo_set_mac_address = dpaa_set_mac_address,
	.ndo_validate_addr = eth_validate_addr,
	.ndo_set_rx_mode = dpaa_set_rx_mode,
2530
	.ndo_do_ioctl = dpaa_ioctl,
2531
	.ndo_setup_tc = dpaa_setup_tc,
2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583
};

static int dpaa_napi_add(struct net_device *net_dev)
{
	struct dpaa_priv *priv = netdev_priv(net_dev);
	struct dpaa_percpu_priv *percpu_priv;
	int cpu;

	for_each_possible_cpu(cpu) {
		percpu_priv = per_cpu_ptr(priv->percpu_priv, cpu);

		netif_napi_add(net_dev, &percpu_priv->np.napi,
			       dpaa_eth_poll, NAPI_POLL_WEIGHT);
	}

	return 0;
}

static void dpaa_napi_del(struct net_device *net_dev)
{
	struct dpaa_priv *priv = netdev_priv(net_dev);
	struct dpaa_percpu_priv *percpu_priv;
	int cpu;

	for_each_possible_cpu(cpu) {
		percpu_priv = per_cpu_ptr(priv->percpu_priv, cpu);

		netif_napi_del(&percpu_priv->np.napi);
	}
}

static inline void dpaa_bp_free_pf(const struct dpaa_bp *bp,
				   struct bm_buffer *bmb)
{
	dma_addr_t addr = bm_buf_addr(bmb);

	dma_unmap_single(bp->dev, addr, bp->size, DMA_FROM_DEVICE);

	skb_free_frag(phys_to_virt(addr));
}

/* Alloc the dpaa_bp struct and configure default values */
static struct dpaa_bp *dpaa_bp_alloc(struct device *dev)
{
	struct dpaa_bp *dpaa_bp;

	dpaa_bp = devm_kzalloc(dev, sizeof(*dpaa_bp), GFP_KERNEL);
	if (!dpaa_bp)
		return ERR_PTR(-ENOMEM);

	dpaa_bp->bpid = FSL_DPAA_BPID_INV;
	dpaa_bp->percpu_count = devm_alloc_percpu(dev, *dpaa_bp->percpu_count);
2584 2585 2586
	if (!dpaa_bp->percpu_count)
		return ERR_PTR(-ENOMEM);

2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613
	dpaa_bp->config_count = FSL_DPAA_ETH_MAX_BUF_COUNT;

	dpaa_bp->seed_cb = dpaa_bp_seed;
	dpaa_bp->free_buf_cb = dpaa_bp_free_pf;

	return dpaa_bp;
}

/* Place all ingress FQs (Rx Default, Rx Error) in a dedicated CGR.
 * We won't be sending congestion notifications to FMan; for now, we just use
 * this CGR to generate enqueue rejections to FMan in order to drop the frames
 * before they reach our ingress queues and eat up memory.
 */
static int dpaa_ingress_cgr_init(struct dpaa_priv *priv)
{
	struct qm_mcc_initcgr initcgr;
	u32 cs_th;
	int err;

	err = qman_alloc_cgrid(&priv->ingress_cgr.cgrid);
	if (err < 0) {
		if (netif_msg_drv(priv))
			pr_err("Error %d allocating CGR ID\n", err);
		goto out_error;
	}

	/* Enable CS TD, but disable Congestion State Change Notifications. */
2614
	memset(&initcgr, 0, sizeof(initcgr));
2615
	initcgr.we_mask = cpu_to_be16(QM_CGR_WE_CS_THRES);
2616 2617 2618 2619
	initcgr.cgr.cscn_en = QM_CGR_EN;
	cs_th = DPAA_INGRESS_CS_THRESHOLD;
	qm_cgr_cs_thres_set64(&initcgr.cgr.cs_thres, cs_th, 1);

2620
	initcgr.we_mask |= cpu_to_be16(QM_CGR_WE_CSTD_EN);
2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680
	initcgr.cgr.cstd_en = QM_CGR_EN;

	/* This CGR will be associated with the SWP affined to the current CPU.
	 * However, we'll place all our ingress FQs in it.
	 */
	err = qman_create_cgr(&priv->ingress_cgr, QMAN_CGR_FLAG_USE_INIT,
			      &initcgr);
	if (err < 0) {
		if (netif_msg_drv(priv))
			pr_err("Error %d creating ingress CGR with ID %d\n",
			       err, priv->ingress_cgr.cgrid);
		qman_release_cgrid(priv->ingress_cgr.cgrid);
		goto out_error;
	}
	if (netif_msg_drv(priv))
		pr_debug("Created ingress CGR %d for netdev with hwaddr %pM\n",
			 priv->ingress_cgr.cgrid, priv->mac_dev->addr);

	priv->use_ingress_cgr = true;

out_error:
	return err;
}

static const struct of_device_id dpaa_match[];

static inline u16 dpaa_get_headroom(struct dpaa_buffer_layout *bl)
{
	u16 headroom;

	/* The frame headroom must accommodate:
	 * - the driver private data area
	 * - parse results, hash results, timestamp if selected
	 * If either hash results or time stamp are selected, both will
	 * be copied to/from the frame headroom, as TS is located between PR and
	 * HR in the IC and IC copy size has a granularity of 16bytes
	 * (see description of FMBM_RICP and FMBM_TICP registers in DPAARM)
	 *
	 * Also make sure the headroom is a multiple of data_align bytes
	 */
	headroom = (u16)(bl->priv_data_size + DPAA_PARSE_RESULTS_SIZE +
		DPAA_TIME_STAMP_SIZE + DPAA_HASH_RESULTS_SIZE);

	return DPAA_FD_DATA_ALIGNMENT ? ALIGN(headroom,
					      DPAA_FD_DATA_ALIGNMENT) :
					headroom;
}

static int dpaa_eth_probe(struct platform_device *pdev)
{
	struct dpaa_bp *dpaa_bps[DPAA_BPS_NUM] = {NULL};
	struct dpaa_percpu_priv *percpu_priv;
	struct net_device *net_dev = NULL;
	struct dpaa_fq *dpaa_fq, *tmp;
	struct dpaa_priv *priv = NULL;
	struct fm_port_fqs port_fqs;
	struct mac_device *mac_dev;
	int err = 0, i, channel;
	struct device *dev;

M
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2681 2682 2683 2684 2685 2686 2687
	/* device used for DMA mapping */
	dev = pdev->dev.parent;
	err = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(40));
	if (err) {
		dev_err(dev, "dma_coerce_mask_and_coherent() failed\n");
		return err;
	}
2688 2689 2690 2691 2692 2693 2694

	/* Allocate this early, so we can store relevant information in
	 * the private area
	 */
	net_dev = alloc_etherdev_mq(sizeof(*priv), DPAA_ETH_TXQ_NUM);
	if (!net_dev) {
		dev_err(dev, "alloc_etherdev_mq() failed\n");
2695
		return -ENOMEM;
2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710
	}

	/* Do this here, so we can be verbose early */
	SET_NETDEV_DEV(net_dev, dev);
	dev_set_drvdata(dev, net_dev);

	priv = netdev_priv(net_dev);
	priv->net_dev = net_dev;

	priv->msg_enable = netif_msg_init(debug, DPAA_MSG_DEFAULT);

	mac_dev = dpaa_mac_dev_get(pdev);
	if (IS_ERR(mac_dev)) {
		dev_err(dev, "dpaa_mac_dev_get() failed\n");
		err = PTR_ERR(mac_dev);
2711
		goto free_netdev;
2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734
	}

	/* If fsl_fm_max_frm is set to a higher value than the all-common 1500,
	 * we choose conservatively and let the user explicitly set a higher
	 * MTU via ifconfig. Otherwise, the user may end up with different MTUs
	 * in the same LAN.
	 * If on the other hand fsl_fm_max_frm has been chosen below 1500,
	 * start with the maximum allowed.
	 */
	net_dev->mtu = min(dpaa_get_max_mtu(), ETH_DATA_LEN);

	netdev_dbg(net_dev, "Setting initial MTU on net device: %d\n",
		   net_dev->mtu);

	priv->buf_layout[RX].priv_data_size = DPAA_RX_PRIV_DATA_SIZE; /* Rx */
	priv->buf_layout[TX].priv_data_size = DPAA_TX_PRIV_DATA_SIZE; /* Tx */

	/* bp init */
	for (i = 0; i < DPAA_BPS_NUM; i++) {
		int err;

		dpaa_bps[i] = dpaa_bp_alloc(dev);
		if (IS_ERR(dpaa_bps[i]))
2735
			goto free_dpaa_bps;
2736 2737 2738 2739 2740 2741 2742
		/* the raw size of the buffers used for reception */
		dpaa_bps[i]->raw_size = bpool_buffer_raw_size(i, DPAA_BPS_NUM);
		/* avoid runtime computations by keeping the usable size here */
		dpaa_bps[i]->size = dpaa_bp_size(dpaa_bps[i]->raw_size);
		dpaa_bps[i]->dev = dev;

		err = dpaa_bp_alloc_pool(dpaa_bps[i]);
2743 2744
		if (err < 0)
			goto free_dpaa_bps;
2745 2746 2747 2748 2749 2750 2751 2752 2753 2754
		priv->dpaa_bps[i] = dpaa_bps[i];
	}

	INIT_LIST_HEAD(&priv->dpaa_fq_list);

	memset(&port_fqs, 0, sizeof(port_fqs));

	err = dpaa_alloc_all_fqs(dev, &priv->dpaa_fq_list, &port_fqs);
	if (err < 0) {
		dev_err(dev, "dpaa_alloc_all_fqs() failed\n");
2755
		goto free_dpaa_bps;
2756 2757 2758 2759 2760 2761 2762 2763
	}

	priv->mac_dev = mac_dev;

	channel = dpaa_get_channel();
	if (channel < 0) {
		dev_err(dev, "dpaa_get_channel() failed\n");
		err = channel;
2764
		goto free_dpaa_bps;
2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783
	}

	priv->channel = (u16)channel;

	/* Start a thread that will walk the CPUs with affine portals
	 * and add this pool channel to each's dequeue mask.
	 */
	dpaa_eth_add_channel(priv->channel);

	dpaa_fq_setup(priv, &dpaa_fq_cbs, priv->mac_dev->port[TX]);

	/* Create a congestion group for this netdev, with
	 * dynamically-allocated CGR ID.
	 * Must be executed after probing the MAC, but before
	 * assigning the egress FQs to the CGRs.
	 */
	err = dpaa_eth_cgr_init(priv);
	if (err < 0) {
		dev_err(dev, "Error initializing CGR\n");
2784
		goto free_dpaa_bps;
2785 2786 2787 2788 2789
	}

	err = dpaa_ingress_cgr_init(priv);
	if (err < 0) {
		dev_err(dev, "Error initializing ingress CGR\n");
2790
		goto delete_egress_cgr;
2791 2792 2793 2794 2795 2796
	}

	/* Add the FQs to the interface, and make them active */
	list_for_each_entry_safe(dpaa_fq, tmp, &priv->dpaa_fq_list, list) {
		err = dpaa_fq_init(dpaa_fq, false);
		if (err < 0)
2797
			goto free_dpaa_fqs;
2798 2799 2800 2801 2802 2803
	}

	priv->tx_headroom = dpaa_get_headroom(&priv->buf_layout[TX]);
	priv->rx_headroom = dpaa_get_headroom(&priv->buf_layout[RX]);

	/* All real interfaces need their ports initialized */
2804 2805 2806
	err = dpaa_eth_init_ports(mac_dev, dpaa_bps, DPAA_BPS_NUM, &port_fqs,
				  &priv->buf_layout[0], dev);
	if (err)
2807
		goto free_dpaa_fqs;
2808

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2809 2810 2811
	/* Rx traffic distribution based on keygen hashing defaults to on */
	priv->keygen_in_use = true;

2812 2813 2814 2815
	priv->percpu_priv = devm_alloc_percpu(dev, *priv->percpu_priv);
	if (!priv->percpu_priv) {
		dev_err(dev, "devm_alloc_percpu() failed\n");
		err = -ENOMEM;
2816
		goto free_dpaa_fqs;
2817 2818 2819 2820 2821 2822
	}
	for_each_possible_cpu(i) {
		percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
		memset(percpu_priv, 0, sizeof(*percpu_priv));
	}

2823 2824 2825
	priv->num_tc = 1;
	netif_set_real_num_tx_queues(net_dev, priv->num_tc * DPAA_TC_TXQ_NUM);

2826 2827 2828
	/* Initialize NAPI */
	err = dpaa_napi_add(net_dev);
	if (err < 0)
2829
		goto delete_dpaa_napi;
2830 2831 2832

	err = dpaa_netdev_init(net_dev, &dpaa_ops, tx_timeout);
	if (err < 0)
2833
		goto delete_dpaa_napi;
2834

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2835 2836
	dpaa_eth_sysfs_init(&net_dev->dev);

2837 2838 2839 2840 2841
	netif_info(priv, probe, net_dev, "Probed interface %s\n",
		   net_dev->name);

	return 0;

2842
delete_dpaa_napi:
2843
	dpaa_napi_del(net_dev);
2844
free_dpaa_fqs:
2845 2846 2847
	dpaa_fq_free(dev, &priv->dpaa_fq_list);
	qman_delete_cgr_safe(&priv->ingress_cgr);
	qman_release_cgrid(priv->ingress_cgr.cgrid);
2848
delete_egress_cgr:
2849 2850
	qman_delete_cgr_safe(&priv->cgr_data.cgr);
	qman_release_cgrid(priv->cgr_data.cgr.cgrid);
2851
free_dpaa_bps:
2852
	dpaa_bps_free(priv);
2853
free_netdev:
2854 2855
	dev_set_drvdata(dev, NULL);
	free_netdev(net_dev);
2856

2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871
	return err;
}

static int dpaa_remove(struct platform_device *pdev)
{
	struct net_device *net_dev;
	struct dpaa_priv *priv;
	struct device *dev;
	int err;

	dev = &pdev->dev;
	net_dev = dev_get_drvdata(dev);

	priv = netdev_priv(net_dev);

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2872 2873
	dpaa_eth_sysfs_remove(dev);

2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892
	dev_set_drvdata(dev, NULL);
	unregister_netdev(net_dev);

	err = dpaa_fq_free(dev, &priv->dpaa_fq_list);

	qman_delete_cgr_safe(&priv->ingress_cgr);
	qman_release_cgrid(priv->ingress_cgr.cgrid);
	qman_delete_cgr_safe(&priv->cgr_data.cgr);
	qman_release_cgrid(priv->cgr_data.cgr.cgrid);

	dpaa_napi_del(net_dev);

	dpaa_bps_free(priv);

	free_netdev(net_dev);

	return err;
}

2893
static const struct platform_device_id dpaa_devtype[] = {
2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941
	{
		.name = "dpaa-ethernet",
		.driver_data = 0,
	}, {
	}
};
MODULE_DEVICE_TABLE(platform, dpaa_devtype);

static struct platform_driver dpaa_driver = {
	.driver = {
		.name = KBUILD_MODNAME,
	},
	.id_table = dpaa_devtype,
	.probe = dpaa_eth_probe,
	.remove = dpaa_remove
};

static int __init dpaa_load(void)
{
	int err;

	pr_debug("FSL DPAA Ethernet driver\n");

	/* initialize dpaa_eth mirror values */
	dpaa_rx_extra_headroom = fman_get_rx_extra_headroom();
	dpaa_max_frm = fman_get_max_frm();

	err = platform_driver_register(&dpaa_driver);
	if (err < 0)
		pr_err("Error, platform_driver_register() = %d\n", err);

	return err;
}
module_init(dpaa_load);

static void __exit dpaa_unload(void)
{
	platform_driver_unregister(&dpaa_driver);

	/* Only one channel is used and needs to be released after all
	 * interfaces are removed
	 */
	dpaa_release_channel();
}
module_exit(dpaa_unload);

MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("FSL DPAA Ethernet driver");