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|
/*
* Copyright 2008-2013 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 ": %s:%hu:%s() " fmt, \
KBUILD_BASENAME".c", __LINE__, __func__
#include <linux/init.h>
#include <linux/module.h>
#include <linux/of_mdio.h>
#include <linux/of_net.h>
#include <linux/kthread.h>
#include <linux/io.h>
#include <linux/if_arp.h> /* arp_hdr_len() */
#include <linux/if_vlan.h> /* VLAN_HLEN */
#include <linux/icmp.h> /* struct icmphdr */
#include <linux/ip.h> /* struct iphdr */
#include <linux/ipv6.h> /* struct ipv6hdr */
#include <linux/udp.h> /* struct udphdr */
#include <linux/tcp.h> /* struct tcphdr */
#include <linux/net.h> /* net_ratelimit() */
#include <linux/if_ether.h> /* ETH_P_IP and ETH_P_IPV6 */
#include <linux/highmem.h>
#include <linux/percpu.h>
#include <linux/dma-mapping.h>
#include <asm/smp.h> /* get_hard_smp_processor_id() */
#include <linux/fsl_bman.h>
#include "fsl_fman.h"
#include "fm_ext.h"
#include "fm_port_ext.h"
#include "mac.h"
#include "dpaa_eth.h"
#include "dpaa_eth_common.h"
#ifdef CONFIG_FSL_DPAA_ETH_DEBUGFS
#include "dpaa_debugfs.h"
#endif /* CONFIG_FSL_DPAA_ETH_DEBUGFS */
#ifdef CONFIG_FSL_DPAA_ETH_UNIT_TESTS
#include "dpaa_eth_unit_test.h"
#endif /* CONFIG_FSL_DPAA_ETH_UNIT_TESTS */
/* CREATE_TRACE_POINTS only needs to be defined once. Other dpa files
* using trace events only need to #include <trace/events/sched.h>
*/
#define CREATE_TRACE_POINTS
#include "dpaa_eth_trace.h"
#define DPA_NAPI_WEIGHT 64
/* Valid checksum indication */
#define DPA_CSUM_VALID 0xFFFF
#define DPA_DESCRIPTION "FSL DPAA Ethernet driver"
MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Andy Fleming <afleming@freescale.com>");
MODULE_DESCRIPTION(DPA_DESCRIPTION);
static uint8_t debug = -1;
module_param(debug, byte, S_IRUGO);
MODULE_PARM_DESC(debug, "Module/Driver verbosity level");
/* This has to work in tandem with the DPA_CS_THRESHOLD_xxx values. */
static uint16_t tx_timeout = 1000;
module_param(tx_timeout, ushort, S_IRUGO);
MODULE_PARM_DESC(tx_timeout, "The Tx timeout in ms");
/* dpaa_eth mirror for the FMan values */
int dpa_rx_extra_headroom;
int dpa_max_frm;
static const char rtx[][3] = {
[RX] = "RX",
[TX] = "TX"
};
#if defined(CONFIG_FSL_FMAN_TEST)
/* Defined as weak, to be implemented by fman pcd tester. */
int dpa_alloc_pcd_fqids(struct device *, uint32_t, uint8_t, uint32_t *)
__attribute__((weak));
int dpa_free_pcd_fqids(struct device *, uint32_t) __attribute__((weak));
#endif /* CONFIG_FSL_DPAA_FMAN_UNIT_TESTS */
/* BM */
#define DPAA_ETH_MAX_PAD (L1_CACHE_BYTES * 8)
struct dpa_bp *default_pool;
bool default_pool_seeded;
uint32_t default_buf_size;
/* A set of callbacks for hooking into the fastpath at different points. */
struct dpaa_eth_hooks_s dpaa_eth_hooks;
/*
* This function should only be called on the probe paths, since it makes no
* effort to guarantee consistency of the destination hooks structure.
*/
void fsl_dpaa_eth_set_hooks(struct dpaa_eth_hooks_s *hooks)
{
if (hooks)
dpaa_eth_hooks = *hooks;
else
pr_err("NULL pointer to hooks!\n");
}
EXPORT_SYMBOL(fsl_dpaa_eth_set_hooks);
/*
* Checks whether the checksum field in Parse Results array is valid
* (equals 0xFFFF) and increments the .cse counter otherwise
*/
static inline void
dpa_csum_validation(const struct dpa_priv_s *priv,
struct dpa_percpu_priv_s *percpu_priv,
const struct qm_fd *fd)
{
dma_addr_t addr = qm_fd_addr(fd);
struct dpa_bp *dpa_bp = priv->dpa_bp;
void *frm = phys_to_virt(addr);
t_FmPrsResult *parse_result;
if (unlikely(!frm))
return;
dma_unmap_single(dpa_bp->dev, addr, dpa_bp->size, DMA_BIDIRECTIONAL);
parse_result = (t_FmPrsResult *)(frm + DPA_RX_PRIV_DATA_SIZE);
if (parse_result->cksum != DPA_CSUM_VALID)
percpu_priv->rx_errors.cse++;
}
static void _dpa_rx_error(struct net_device *net_dev,
const struct dpa_priv_s *priv,
struct dpa_percpu_priv_s *percpu_priv,
const struct qm_fd *fd,
u32 fqid)
{
/*
* limit common, possibly innocuous Rx FIFO Overflow errors'
* interference with zero-loss convergence benchmark results.
*/
if (likely(fd->status & FM_FD_STAT_ERR_PHYSICAL))
pr_warn_once("fsl-dpa: non-zero error counters in fman statistics (sysfs)\n");
else
if (netif_msg_hw(priv) && net_ratelimit())
netdev_err(net_dev, "Err FD status = 0x%08x\n",
fd->status & FM_FD_STAT_ERRORS);
if (dpaa_eth_hooks.rx_error &&
dpaa_eth_hooks.rx_error(net_dev, fd, fqid) == DPAA_ETH_STOLEN)
/* it's up to the hook to perform resource cleanup */
return;
percpu_priv->stats.rx_errors++;
if (fd->status & FM_PORT_FRM_ERR_DMA)
percpu_priv->rx_errors.dme++;
if (fd->status & FM_PORT_FRM_ERR_PHYSICAL)
percpu_priv->rx_errors.fpe++;
if (fd->status & FM_PORT_FRM_ERR_SIZE)
percpu_priv->rx_errors.fse++;
if (fd->status & FM_PORT_FRM_ERR_PRS_HDR_ERR)
percpu_priv->rx_errors.phe++;
if (fd->status & FM_FD_STAT_L4CV)
dpa_csum_validation(priv, percpu_priv, fd);
dpa_fd_release(net_dev, fd);
}
static void _dpa_tx_error(struct net_device *net_dev,
const struct dpa_priv_s *priv,
struct dpa_percpu_priv_s *percpu_priv,
const struct qm_fd *fd,
u32 fqid)
{
struct sk_buff *skb;
if (netif_msg_hw(priv) && net_ratelimit())
netdev_warn(net_dev, "FD status = 0x%08x\n",
fd->status & FM_FD_STAT_ERRORS);
if (dpaa_eth_hooks.tx_error &&
dpaa_eth_hooks.tx_error(net_dev, fd, fqid) == DPAA_ETH_STOLEN)
/* now the hook must ensure proper cleanup */
return;
percpu_priv->stats.tx_errors++;
skb = _dpa_cleanup_tx_fd(priv, fd);
dev_kfree_skb(skb);
}
/*
* Helper function to factor out frame validation logic on all Rx paths. Its
* purpose is to extract from the Parse Results structure information about
* the integrity of the frame, its checksum, the length of the parsed headers
* and whether the frame is suitable for GRO.
*
* Assumes no parser errors, since any error frame is dropped before this
* function is called.
*
* @skb will have its ip_summed field overwritten;
* @use_gro will only be written with 0, if the frame is definitely not
* GRO-able; otherwise, it will be left unchanged;
* @hdr_size will be written with a safe value, at least the size of the
* headers' length.
*/
void __hot _dpa_process_parse_results(const t_FmPrsResult *parse_results,
const struct qm_fd *fd,
struct sk_buff *skb, int *use_gro)
{
if (fd->status & FM_FD_STAT_L4CV) {
/*
* 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.
*/
skb->ip_summed = CHECKSUM_UNNECESSARY;
/*
* Don't go through GRO for certain types of traffic that
* we know are not GRO-able, such as dgram-based protocols.
* In the worst-case scenarios, such as small-pkt terminating
* UDP, the extra GRO processing would be overkill.
*
* The only protocol the Parser supports that is also GRO-able
* is currently TCP.
*/
if (!fm_l4_frame_is_tcp(parse_results))
*use_gro = 0;
return;
}
/*
* 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
*/
skb->ip_summed = CHECKSUM_NONE;
/* Bypass GRO for unknown traffic or if no PCDs are applied */
*use_gro = 0;
}
static int dpaa_eth_poll(struct napi_struct *napi, int budget)
{
int cleaned = qman_poll_dqrr(budget);
if (cleaned < budget) {
int tmp;
napi_complete(napi);
tmp = qman_irqsource_add(QM_PIRQ_DQRI);
BUG_ON(tmp);
}
return cleaned;
}
static void __hot _dpa_tx_conf(struct net_device *net_dev,
const struct dpa_priv_s *priv,
struct dpa_percpu_priv_s *percpu_priv,
const struct qm_fd *fd,
u32 fqid)
{
struct sk_buff *skb;
/* do we need the timestamp for the error frames? */
if (unlikely(fd->status & FM_FD_STAT_ERRORS) != 0) {
if (netif_msg_hw(priv) && net_ratelimit())
netdev_warn(net_dev, "FD status = 0x%08x\n",
fd->status & FM_FD_STAT_ERRORS);
percpu_priv->stats.tx_errors++;
}
/* hopefully we need not get the timestamp before the hook */
if (dpaa_eth_hooks.tx_confirm && dpaa_eth_hooks.tx_confirm(net_dev,
fd, fqid) == DPAA_ETH_STOLEN)
/* it's the hook that must now perform cleanup */
return;
/* This might not perfectly reflect the reality, if the core dequeuing
* the Tx confirmation is different from the one that did the enqueue,
* but at least it'll show up in the total count.
*/
percpu_priv->tx_confirm++;
skb = _dpa_cleanup_tx_fd(priv, fd);
dev_kfree_skb(skb);
}
static enum qman_cb_dqrr_result
priv_rx_error_dqrr(struct qman_portal *portal,
struct qman_fq *fq,
const struct qm_dqrr_entry *dq)
{
struct net_device *net_dev;
struct dpa_priv_s *priv;
struct dpa_percpu_priv_s *percpu_priv;
net_dev = ((struct dpa_fq *)fq)->net_dev;
priv = netdev_priv(net_dev);
percpu_priv = per_cpu_ptr(priv->percpu_priv, smp_processor_id());
if (dpaa_eth_napi_schedule(percpu_priv)) {
percpu_priv->in_interrupt++;
return qman_cb_dqrr_stop;
}
if (unlikely(dpaa_eth_refill_bpools(percpu_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.
*/
dpa_fd_release(net_dev, &dq->fd);
else
_dpa_rx_error(net_dev, priv, percpu_priv, &dq->fd, fq->fqid);
return qman_cb_dqrr_consume;
}
static enum qman_cb_dqrr_result __hot
priv_rx_default_dqrr(struct qman_portal *portal,
struct qman_fq *fq,
const struct qm_dqrr_entry *dq)
{
struct net_device *net_dev;
struct dpa_priv_s *priv;
struct dpa_percpu_priv_s *percpu_priv;
net_dev = ((struct dpa_fq *)fq)->net_dev;
priv = netdev_priv(net_dev);
/* Trace the Rx fd */
trace_dpa_rx_fd(net_dev, fq, &dq->fd);
/* IRQ handler, non-migratable; safe to use __this_cpu_ptr here */
percpu_priv = __this_cpu_ptr(priv->percpu_priv);
if (unlikely(dpaa_eth_napi_schedule(percpu_priv))) {
percpu_priv->in_interrupt++;
return qman_cb_dqrr_stop;
}
/* Vale of plenty: make sure we didn't run out of buffers */
if (unlikely(dpaa_eth_refill_bpools(percpu_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.
*/
dpa_fd_release(net_dev, &dq->fd);
else
_dpa_rx(net_dev, priv, percpu_priv, &dq->fd, fq->fqid);
return qman_cb_dqrr_consume;
}
static enum qman_cb_dqrr_result
priv_tx_conf_error_dqrr(struct qman_portal *portal,
struct qman_fq *fq,
const struct qm_dqrr_entry *dq)
{
struct net_device *net_dev;
struct dpa_priv_s *priv;
struct dpa_percpu_priv_s *percpu_priv;
net_dev = ((struct dpa_fq *)fq)->net_dev;
priv = netdev_priv(net_dev);
percpu_priv = per_cpu_ptr(priv->percpu_priv, smp_processor_id());
if (dpaa_eth_napi_schedule(percpu_priv)) {
percpu_priv->in_interrupt++;
return qman_cb_dqrr_stop;
}
_dpa_tx_error(net_dev, priv, percpu_priv, &dq->fd, fq->fqid);
return qman_cb_dqrr_consume;
}
static enum qman_cb_dqrr_result __hot
priv_tx_conf_default_dqrr(struct qman_portal *portal,
struct qman_fq *fq,
const struct qm_dqrr_entry *dq)
{
struct net_device *net_dev;
struct dpa_priv_s *priv;
struct dpa_percpu_priv_s *percpu_priv;
net_dev = ((struct dpa_fq *)fq)->net_dev;
priv = netdev_priv(net_dev);
/* Trace the fd */
trace_dpa_tx_conf_fd(net_dev, fq, &dq->fd);
/* Non-migratable context, safe to use __this_cpu_ptr */
percpu_priv = __this_cpu_ptr(priv->percpu_priv);
if (dpaa_eth_napi_schedule(percpu_priv)) {
percpu_priv->in_interrupt++;
return qman_cb_dqrr_stop;
}
_dpa_tx_conf(net_dev, priv, percpu_priv, &dq->fd, fq->fqid);
return qman_cb_dqrr_consume;
}
static void priv_ern(struct qman_portal *portal,
struct qman_fq *fq,
const struct qm_mr_entry *msg)
{
struct net_device *net_dev;
const struct dpa_priv_s *priv;
struct sk_buff *skb;
struct dpa_percpu_priv_s *percpu_priv;
struct qm_fd fd = msg->ern.fd;
net_dev = ((struct dpa_fq *)fq)->net_dev;
priv = netdev_priv(net_dev);
/* Non-migratable context, safe to use __this_cpu_ptr */
percpu_priv = __this_cpu_ptr(priv->percpu_priv);
percpu_priv->stats.tx_dropped++;
percpu_priv->stats.tx_fifo_errors++;
count_ern(percpu_priv, msg);
/*
* If we intended this buffer to go into the pool
* when the FM was done, we need to put it in
* manually.
*/
if (msg->ern.fd.cmd & FM_FD_CMD_FCO) {
dpa_fd_release(net_dev, &fd);
return;
}
skb = _dpa_cleanup_tx_fd(priv, &fd);
dev_kfree_skb_any(skb);
}
static const dpa_fq_cbs_t private_fq_cbs = {
.rx_defq = { .cb = { .dqrr = priv_rx_default_dqrr } },
.tx_defq = { .cb = { .dqrr = priv_tx_conf_default_dqrr } },
.rx_errq = { .cb = { .dqrr = priv_rx_error_dqrr } },
.tx_errq = { .cb = { .dqrr = priv_tx_conf_error_dqrr } },
.egress_ern = { .cb = { .ern = priv_ern } }
};
static void dpaa_eth_napi_enable(struct dpa_priv_s *priv)
{
struct dpa_percpu_priv_s *percpu_priv;
int i;
for_each_online_cpu(i) {
percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
napi_enable(&percpu_priv->napi);
}
}
static void dpaa_eth_napi_disable(struct dpa_priv_s *priv)
{
struct dpa_percpu_priv_s *percpu_priv;
int i;
for_each_online_cpu(i) {
percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
napi_disable(&percpu_priv->napi);
}
}
static int __cold dpa_eth_priv_start(struct net_device *net_dev)
{
int i, err;
struct dpa_priv_s *priv;
struct dpa_percpu_priv_s *percpu_priv;
priv = netdev_priv(net_dev);
/* Seed the global buffer pool at the first ifconfig up
* of a private port. Update the percpu buffer counters
* of each private interface.
*/
if (!default_pool_seeded) {
default_pool->size = default_buf_size;
dpa_make_private_pool(default_pool);
default_pool_seeded = true;
}
for_each_online_cpu(i) {
percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
if (!percpu_priv->dpa_bp) {
percpu_priv->dpa_bp = priv->dpa_bp;
percpu_priv->dpa_bp_count =
per_cpu_ptr(priv->dpa_bp->percpu_count,
i);
}
}
dpaa_eth_napi_enable(priv);
err = dpa_start(net_dev);
if (err < 0)
dpaa_eth_napi_disable(priv);
return err;
}
static int __cold dpa_eth_priv_stop(struct net_device *net_dev)
{
int _errno;
struct dpa_priv_s *priv;
_errno = dpa_stop(net_dev);
priv = netdev_priv(net_dev);
dpaa_eth_napi_disable(priv);
return _errno;
}
#ifdef CONFIG_NET_POLL_CONTROLLER
static void dpaa_eth_poll_controller(struct net_device *net_dev)
{
struct dpa_priv_s *priv = netdev_priv(net_dev);
struct dpa_percpu_priv_s *percpu_priv =
this_cpu_ptr(priv->percpu_priv);
struct napi_struct napi = percpu_priv->napi;
qman_irqsource_remove(QM_PIRQ_DQRI);
qman_poll_dqrr(napi.weight);
qman_irqsource_add(QM_PIRQ_DQRI);
}
#endif
static const struct net_device_ops dpa_private_ops = {
.ndo_open = dpa_eth_priv_start,
.ndo_start_xmit = dpa_tx,
.ndo_stop = dpa_eth_priv_stop,
.ndo_tx_timeout = dpa_timeout,
.ndo_get_stats64 = dpa_get_stats64,
.ndo_set_mac_address = dpa_set_mac_address,
.ndo_validate_addr = eth_validate_addr,
#ifdef CONFIG_FSL_DPAA_ETH_USE_NDO_SELECT_QUEUE
.ndo_select_queue = dpa_select_queue,
#endif
.ndo_change_mtu = dpa_change_mtu,
.ndo_set_rx_mode = dpa_set_rx_mode,
.ndo_init = dpa_ndo_init,
.ndo_set_features = dpa_set_features,
.ndo_fix_features = dpa_fix_features,
.ndo_do_ioctl = dpa_ioctl,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = dpaa_eth_poll_controller,
#endif
};
static int dpa_private_netdev_init(struct device_node *dpa_node,
struct net_device *net_dev)
{
int i;
struct dpa_priv_s *priv = netdev_priv(net_dev);
struct dpa_percpu_priv_s *percpu_priv;
const uint8_t *mac_addr;
/*
* Although we access another CPU's private data here
* we do it at initialization so it is safe
*/
for_each_online_cpu(i) {
percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
percpu_priv->net_dev = net_dev;
netif_napi_add(net_dev, &percpu_priv->napi, dpaa_eth_poll,
DPA_NAPI_WEIGHT);
}
net_dev->netdev_ops = &dpa_private_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->hw_features |= (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
NETIF_F_LLTX);
#ifdef CONFIG_FSL_DPAA_ETH_SG_SUPPORT
/* Advertise S/G and HIGHDMA support for private interfaces */
net_dev->hw_features |= NETIF_F_SG | NETIF_F_HIGHDMA;
/* Recent kernels enable GSO automatically, if
* we declare NETIF_F_SG. For conformity, we'll
* still declare GSO explicitly.
*/
net_dev->features |= NETIF_F_GSO;
#endif
/* Advertise GRO support */
net_dev->features |= NETIF_F_GRO;
return dpa_netdev_init(dpa_node, net_dev, mac_addr, tx_timeout);
}
static struct dpa_bp * __cold
dpa_priv_bp_probe(struct device *dev)
{
struct dpa_bp *dpa_bp;
dpa_bp = devm_kzalloc(dev, sizeof(*dpa_bp), GFP_KERNEL);
if (unlikely(dpa_bp == NULL)) {
dev_err(dev, "devm_kzalloc() failed\n");
return ERR_PTR(-ENOMEM);
}
dpa_bp->target_count = CONFIG_FSL_DPAA_ETH_MAX_BUF_COUNT;
dpa_bp->requires_draining = true;
return dpa_bp;
}
static int
dpa_priv_bp_alloc(struct dpa_bp *dpa_bp)
{
int err;
struct bman_pool_params bp_params;
struct platform_device *pdev;
BUG_ON(dpa_bp->size == 0);
BUG_ON(dpa_bp->config_count == 0);
bp_params.flags = BMAN_POOL_FLAG_DEPLETION;
bp_params.cb = dpa_bp_depletion;
bp_params.cb_ctx = dpa_bp;
if (default_pool) {
atomic_inc(&default_pool->refs);
return 0;
}
/* If the pool is already specified, we only create one per bpid */
if (dpa_bpid2pool_use(dpa_bp->bpid))
return 0;
if (dpa_bp->bpid == 0)
bp_params.flags |= BMAN_POOL_FLAG_DYNAMIC_BPID;
else
bp_params.bpid = dpa_bp->bpid;
dpa_bp->pool = bman_new_pool(&bp_params);
if (unlikely(dpa_bp->pool == NULL)) {
pr_err("bman_new_pool() failed\n");
return -ENODEV;
}
dpa_bp->bpid = bman_get_params(dpa_bp->pool)->bpid;
pdev = platform_device_register_simple("dpaa_eth_bpool",
dpa_bp->bpid, NULL, 0);
if (IS_ERR(pdev)) {
err = PTR_ERR(pdev);
goto pdev_register_failed;
}
err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(40));
if (err)
goto pdev_mask_failed;
dpa_bp->dev = &pdev->dev;
if (!default_pool)
default_pool = dpa_bp;
dpa_bpid2pool_map(dpa_bp->bpid, dpa_bp);
return 0;
pdev_mask_failed:
platform_device_unregister(pdev);
pdev_register_failed:
bman_free_pool(dpa_bp->pool);
return err;
}
static int dpa_priv_bp_create(struct net_device *net_dev, struct dpa_bp *dpa_bp,
size_t count)
{
struct dpa_priv_s *priv = netdev_priv(net_dev);
int i;
if (netif_msg_probe(priv))
dev_dbg(net_dev->dev.parent,
"Using private BM buffer pools\n");
priv->dpa_bp = dpa_bp;
priv->bp_count = count;
for (i = 0; i < count; i++) {
int err;
err = dpa_priv_bp_alloc(&dpa_bp[i]);
if (err < 0) {
dpa_bp_free(priv, dpa_bp);
priv->dpa_bp = NULL;
return err;
}
priv->dpa_bp = default_pool;
}
return 0;
}
static const struct of_device_id dpa_match[];
static int
dpaa_eth_priv_probe(struct platform_device *_of_dev)
{
int err = 0, i;
struct device *dev;
struct device_node *dpa_node;
struct dpa_bp *dpa_bp;
struct dpa_fq *dpa_fq, *tmp;
size_t count = 1;
struct net_device *net_dev = NULL;
struct dpa_priv_s *priv = NULL;
struct dpa_percpu_priv_s *percpu_priv;
struct fm_port_fqs port_fqs;
struct dpa_buffer_layout_s *buf_layout = NULL;
struct mac_device *mac_dev;
struct task_struct *kth;
dev = &_of_dev->dev;
dpa_node = dev->of_node;
if (!of_device_is_available(dpa_node))
return -ENODEV;
/* Get the buffer pools assigned to this interface;
* run only once the default pool probing code
*/
dpa_bp = (default_pool) ? default_pool : dpa_priv_bp_probe(dev);
if (IS_ERR(dpa_bp))
return PTR_ERR(dpa_bp);
/*
* Allocate this early, so we can store relevant information in
* the private area (needed by 1588 code in dpa_mac_probe)
*/
net_dev = alloc_etherdev_mq(sizeof(*priv), DPAA_ETH_TX_QUEUES);
if (!net_dev) {
dev_err(dev, "alloc_etherdev_mq() failed\n");
return -ENOMEM;
}
/* 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;
strcpy(priv->if_type, "private");
priv->msg_enable = netif_msg_init(debug, -1);
mac_dev = dpa_mac_probe(_of_dev);
if (IS_ERR(mac_dev) || !mac_dev) {
err = PTR_ERR(mac_dev);
goto mac_probe_failed;
}
/* We have physical ports, so we need to establish
* the buffer layout.
*/
buf_layout = devm_kzalloc(dev, 2 * sizeof(*buf_layout),
GFP_KERNEL);
if (!buf_layout) {
dev_err(dev, "devm_kzalloc() failed\n");
goto alloc_failed;
}
dpa_set_buffers_layout(mac_dev, buf_layout);
/* For private ports, need to compute the size of the default
* buffer pool, based on FMan port buffer layout;also update
* the maximum buffer size for private ports if necessary
*/
dpa_bp->size = dpa_bp_size(&buf_layout[RX]);
if (dpa_bp->size > default_buf_size)
default_buf_size = dpa_bp->size;
INIT_LIST_HEAD(&priv->dpa_fq_list);
memset(&port_fqs, 0, sizeof(port_fqs));
err = dpa_fq_probe_mac(dev, &priv->dpa_fq_list, &port_fqs, true, RX);
if (!err)
err = dpa_fq_probe_mac(dev, &priv->dpa_fq_list,
&port_fqs, true, TX);
if (err < 0)
goto fq_probe_failed;
/* bp init */
err = dpa_priv_bp_create(net_dev, dpa_bp, count);
if (err < 0)
goto bp_create_failed;
priv->mac_dev = mac_dev;
priv->channel = dpa_get_channel(dev, dpa_node);
if (priv->channel < 0) {
err = priv->channel;
goto get_channel_failed;
}
/* Start a thread that will walk the cpus with affine portals
* and add this pool channel to each's dequeue mask.
*/
kth = kthread_run(dpaa_eth_add_channel,
(void *)(unsigned long)priv->channel,
"dpaa_%p:%d", net_dev, priv->channel);
if (!kth) {
err = -ENOMEM;
goto add_channel_failed;
}
dpa_fq_setup(priv, &private_fq_cbs, priv->mac_dev->port_dev[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");
goto cgr_init_failed;
}
/* Add the FQs to the interface, and make them active */
list_for_each_entry_safe(dpa_fq, tmp, &priv->dpa_fq_list, list) {
err = dpa_fq_init(dpa_fq, false);
if (err < 0)
goto fq_alloc_failed;
}
priv->buf_layout = buf_layout;
priv->tx_headroom = dpa_get_headroom(&priv->buf_layout[TX]);
priv->rx_headroom = dpa_get_headroom(&priv->buf_layout[RX]);
/* All real interfaces need their ports initialized */
dpaa_eth_init_ports(mac_dev, dpa_bp, count, &port_fqs,
buf_layout, dev);
priv->percpu_priv = alloc_percpu(*priv->percpu_priv);
if (priv->percpu_priv == NULL) {
dev_err(dev, "alloc_percpu() failed\n");
err = -ENOMEM;
goto alloc_percpu_failed;
}
for_each_online_cpu(i) {
percpu_priv = per_cpu_ptr(priv->percpu_priv, i);
memset(percpu_priv, 0, sizeof(*percpu_priv));
}
err = dpa_private_netdev_init(dpa_node, net_dev);
if (err < 0)
goto netdev_init_failed;
dpaa_eth_sysfs_init(&net_dev->dev);
printk(KERN_INFO "fsl_dpa: Probed interface %s\n", net_dev->name);
#ifdef CONFIG_FSL_DPAA_ETH_UNIT_TESTS
/* The unit test is designed to test private interfaces */
dpa_unit_tests(net_dev);
#endif
return 0;
netdev_init_failed:
if (net_dev)
free_percpu(priv->percpu_priv);
alloc_percpu_failed:
fq_alloc_failed:
if (net_dev) {
dpa_fq_free(dev, &priv->dpa_fq_list);
qman_release_cgrid(priv->cgr_data.cgr.cgrid);
qman_delete_cgr(&priv->cgr_data.cgr);
}
cgr_init_failed:
add_channel_failed:
get_channel_failed:
if (net_dev)
dpa_bp_free(priv, priv->dpa_bp);
bp_create_failed:
fq_probe_failed:
devm_kfree(dev, buf_layout);
alloc_failed:
mac_probe_failed:
dev_set_drvdata(dev, NULL);
if (net_dev)
free_netdev(net_dev);
return err;
}
static const struct of_device_id dpa_match[] = {
{
.compatible = "fsl,dpa-ethernet"
},
{}
};
MODULE_DEVICE_TABLE(of, dpa_match);
static struct platform_driver dpa_driver = {
.driver = {
.name = KBUILD_MODNAME,
.of_match_table = dpa_match,
.owner = THIS_MODULE,
},
.probe = dpaa_eth_priv_probe,
.remove = dpa_remove
};
static int __init __cold dpa_load(void)
{
int _errno;
printk(KERN_INFO KBUILD_MODNAME ": " DPA_DESCRIPTION " (" VERSION ")\n");
/* initialise dpaa_eth mirror values */
dpa_rx_extra_headroom = fm_get_rx_extra_headroom();
dpa_max_frm = fm_get_max_frm();
_errno = platform_driver_register(&dpa_driver);
if (unlikely(_errno < 0)) {
pr_err(KBUILD_MODNAME
": %s:%hu:%s(): platform_driver_register() = %d\n",
KBUILD_BASENAME".c", __LINE__, __func__, _errno);
}
pr_debug(KBUILD_MODNAME ": %s:%s() ->\n",
KBUILD_BASENAME".c", __func__);
return _errno;
}
module_init(dpa_load);
static void __exit __cold dpa_unload(void)
{
pr_debug(KBUILD_MODNAME ": -> %s:%s()\n",
KBUILD_BASENAME".c", __func__);
platform_driver_unregister(&dpa_driver);
pr_debug(KBUILD_MODNAME ": %s:%s() ->\n",
KBUILD_BASENAME".c", __func__);
}
module_exit(dpa_unload);
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