From f5ed3aa62075849b1687731349e5b679c732118a Mon Sep 17 00:00:00 2001 From: Sebastian Huber Date: Fri, 27 Oct 2017 11:50:01 +0200 Subject: sdk_dpaa: Import from QorIQ SDK Linux http://git.freescale.com/git/cgit.cgi/ppc/sdk/linux.git Commit 1ae843c08261402b2c35d83422e4fa1e313611f4 (fsl-sdk-v2.0-1703). Update #3277. --- .../ethernet/freescale/sdk_dpaa/dpaa_eth_macless.c | 498 +++++++++++++++++++++ 1 file changed, 498 insertions(+) create mode 100644 linux/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_macless.c (limited to 'linux/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_macless.c') diff --git a/linux/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_macless.c b/linux/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_macless.c new file mode 100644 index 00000000..b21afa30 --- /dev/null +++ b/linux/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_macless.c @@ -0,0 +1,498 @@ +#include + +/* 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. + */ + +#ifdef CONFIG_FSL_DPAA_ETH_DEBUG +#define pr_fmt(fmt) \ + KBUILD_MODNAME ": %s:%hu:%s() " fmt, \ + KBUILD_BASENAME".c", __LINE__, __func__ +#else +#define pr_fmt(fmt) \ + KBUILD_MODNAME ": " fmt +#endif + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "dpaa_eth.h" +#include "dpaa_eth_common.h" +#include "dpaa_eth_base.h" +#include "lnxwrp_fsl_fman.h" /* fm_get_rx_extra_headroom(), fm_get_max_frm() */ +#include "mac.h" + +/* For MAC-based interfaces, we compute the tx needed headroom from the + * associated Tx port's buffer layout settings. + * For MACless interfaces just use a default value. + */ +#define DPA_DEFAULT_TX_HEADROOM 64 + +#define DPA_DESCRIPTION "FSL DPAA MACless Ethernet driver" + +MODULE_LICENSE("Dual BSD/GPL"); + +MODULE_DESCRIPTION(DPA_DESCRIPTION); + +/* This has to work in tandem with the DPA_CS_THRESHOLD_xxx values. */ +static uint16_t macless_tx_timeout = 1000; +module_param(macless_tx_timeout, ushort, S_IRUGO); +MODULE_PARM_DESC(macless_tx_timeout, "The MACless Tx timeout in ms"); + +/* forward declarations */ +static int __cold dpa_macless_start(struct net_device *net_dev); +static int __cold dpa_macless_stop(struct net_device *net_dev); +static int __cold dpa_macless_set_address(struct net_device *net_dev, + void *addr); +static void __cold dpa_macless_set_rx_mode(struct net_device *net_dev); + +static int dpaa_eth_macless_probe(struct platform_device *_of_dev); +static netdev_features_t +dpa_macless_fix_features(struct net_device *dev, netdev_features_t features); + +static const struct net_device_ops dpa_macless_ops = { + .ndo_open = dpa_macless_start, + .ndo_start_xmit = dpa_shared_tx, + .ndo_stop = dpa_macless_stop, + .ndo_tx_timeout = dpa_timeout, + .ndo_get_stats64 = dpa_get_stats64, + .ndo_set_mac_address = dpa_macless_set_address, + .ndo_set_rx_mode = dpa_macless_set_rx_mode, + .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_init = dpa_ndo_init, + .ndo_set_features = dpa_set_features, + .ndo_fix_features = dpa_macless_fix_features, +}; + +static const struct of_device_id dpa_macless_match[] = { + { + .compatible = "fsl,dpa-ethernet-macless" + }, + {} +}; +MODULE_DEVICE_TABLE(of, dpa_macless_match); + +static struct platform_driver dpa_macless_driver = { + .driver = { + .name = KBUILD_MODNAME "-macless", + .of_match_table = dpa_macless_match, + .owner = THIS_MODULE, + }, + .probe = dpaa_eth_macless_probe, + .remove = dpa_remove +}; + +static const char macless_frame_queues[][25] = { + [RX] = "fsl,qman-frame-queues-rx", + [TX] = "fsl,qman-frame-queues-tx" +}; + +static int __cold dpa_macless_start(struct net_device *net_dev) +{ + const struct dpa_priv_s *priv = netdev_priv(net_dev); + struct proxy_device *proxy_dev = (struct proxy_device *)priv->peer; + + netif_tx_start_all_queues(net_dev); + + if (proxy_dev) + dpa_proxy_start(net_dev); + + + return 0; +} + +static int __cold dpa_macless_stop(struct net_device *net_dev) +{ + const struct dpa_priv_s *priv = netdev_priv(net_dev); + struct proxy_device *proxy_dev = (struct proxy_device *)priv->peer; + + netif_tx_stop_all_queues(net_dev); + + if (proxy_dev) + dpa_proxy_stop(proxy_dev, net_dev); + + return 0; +} + +static int dpa_macless_set_address(struct net_device *net_dev, void *addr) +{ + const struct dpa_priv_s *priv = netdev_priv(net_dev); + struct proxy_device *proxy_dev = (struct proxy_device *)priv->peer; + int _errno; + + _errno = eth_mac_addr(net_dev, addr); + if (_errno < 0) { + if (netif_msg_drv(priv)) + netdev_err(net_dev, "eth_mac_addr() = %d\n", _errno); + return _errno; + } + + if (proxy_dev) { + _errno = dpa_proxy_set_mac_address(proxy_dev, net_dev); + if (_errno < 0) { + if (netif_msg_drv(priv)) + netdev_err(net_dev, "proxy_set_mac_address() = %d\n", + _errno); + return _errno; + } + } + + return 0; +} + +static void __cold dpa_macless_set_rx_mode(struct net_device *net_dev) +{ + const struct dpa_priv_s *priv = netdev_priv(net_dev); + struct proxy_device *proxy_dev = (struct proxy_device *)priv->peer; + + if (proxy_dev) + dpa_proxy_set_rx_mode(proxy_dev, net_dev); +} + +static netdev_features_t +dpa_macless_fix_features(struct net_device *dev, netdev_features_t features) +{ + netdev_features_t unsupported_features = 0; + + /* In theory we should never be requested to enable features that + * we didn't set in netdev->features and netdev->hw_features at probe + * time, but double check just to be on the safe side. + */ + unsupported_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; + /* We don't support enabling Rx csum through ethtool yet */ + unsupported_features |= NETIF_F_RXCSUM; + + features &= ~unsupported_features; + + return features; +} + +static int dpa_macless_netdev_init(struct device_node *dpa_node, + struct net_device *net_dev) +{ + struct dpa_priv_s *priv = netdev_priv(net_dev); + struct proxy_device *proxy_dev = (struct proxy_device *)priv->peer; + struct device *dev = net_dev->dev.parent; + const uint8_t *mac_addr; + + net_dev->netdev_ops = &dpa_macless_ops; + + if (proxy_dev) { + struct mac_device *mac_dev = proxy_dev->mac_dev; + net_dev->mem_start = mac_dev->res->start; + net_dev->mem_end = mac_dev->res->end; + + return dpa_netdev_init(net_dev, mac_dev->addr, + macless_tx_timeout); + } else { + /* Get the MAC address from device tree */ + mac_addr = of_get_mac_address(dpa_node); + + if (mac_addr == NULL) { + if (netif_msg_probe(priv)) + dev_err(dev, "No MAC address found!\n"); + return -EINVAL; + } + + return dpa_netdev_init(net_dev, mac_addr, + macless_tx_timeout); + } +} + +/* Probing of FQs for MACless ports */ +static int dpa_fq_probe_macless(struct device *dev, struct list_head *list, + enum port_type ptype) +{ + struct device_node *np = dev->of_node; + const struct fqid_cell *fqids; + int num_ranges; + int i, lenp; + + fqids = of_get_property(np, macless_frame_queues[ptype], &lenp); + if (fqids == NULL) { + dev_err(dev, "Need FQ definition in dts for MACless devices\n"); + return -EINVAL; + } + + num_ranges = lenp / sizeof(*fqids); + + /* All ranges defined in the device tree are used as Rx/Tx queues */ + for (i = 0; i < num_ranges; i++) { + if (!dpa_fq_alloc(dev, be32_to_cpu(fqids[i].start), + be32_to_cpu(fqids[i].count), list, + ptype == RX ? FQ_TYPE_RX_PCD : FQ_TYPE_TX)) { + dev_err(dev, "_dpa_fq_alloc() failed\n"); + return -ENOMEM; + } + } + + return 0; +} + + static struct proxy_device * +dpa_macless_proxy_probe(struct platform_device *_of_dev) +{ + struct device *dev; + const phandle *proxy_prop; + struct proxy_device *proxy_dev; + struct device_node *proxy_node; + struct platform_device *proxy_pdev; + int lenp; + + dev = &_of_dev->dev; + + proxy_prop = of_get_property(dev->of_node, "proxy", &lenp); + if (!proxy_prop) + return NULL; + + proxy_node = of_find_node_by_phandle(*proxy_prop); + if (!proxy_node) { + dev_err(dev, "Cannot find proxy node\n"); + return NULL; + } + + proxy_pdev = of_find_device_by_node(proxy_node); + if (!proxy_pdev) { + of_node_put(proxy_node); + dev_err(dev, "Cannot find device represented by proxy node\n"); + return NULL; + } + + proxy_dev = dev_get_drvdata(&proxy_pdev->dev); + + of_node_put(proxy_node); + + return proxy_dev; +} + +static int dpaa_eth_macless_probe(struct platform_device *_of_dev) +{ + int err = 0, i, channel; + struct device *dev; + struct device_node *dpa_node; + struct dpa_bp *dpa_bp; + size_t count; + struct net_device *net_dev = NULL; + struct dpa_priv_s *priv = NULL; + struct dpa_percpu_priv_s *percpu_priv; + static struct proxy_device *proxy_dev; + struct task_struct *kth; + static u8 macless_idx; + + 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 */ + dpa_bp = dpa_bp_probe(_of_dev, &count); + if (IS_ERR(dpa_bp)) + return PTR_ERR(dpa_bp); + + for (i = 0; i < count; i++) + dpa_bp[i].seed_cb = dpa_bp_shared_port_seed; + + proxy_dev = dpa_macless_proxy_probe(_of_dev); + + + /* 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; + sprintf(priv->if_type, "macless%d", macless_idx++); + + priv->msg_enable = netif_msg_init(advanced_debug, -1); + + priv->peer = NULL; + priv->mac_dev = NULL; + if (proxy_dev) { + /* This is a temporary solution for the need of + * having main driver upstreamability: adjust_link + * is a general function that should work for both + * private driver and macless driver with MAC device + * control capabilities even if the last will not be + * upstreamable. + * TODO: find a convenient solution (wrapper over + * main priv structure, etc.) + */ + priv->mac_dev = proxy_dev->mac_dev; + + /* control over proxy's mac device */ + priv->peer = (void *)proxy_dev; + } + + INIT_LIST_HEAD(&priv->dpa_fq_list); + + err = dpa_fq_probe_macless(dev, &priv->dpa_fq_list, RX); + if (!err) + err = dpa_fq_probe_macless(dev, &priv->dpa_fq_list, + TX); + if (err < 0) + goto fq_probe_failed; + + /* bp init */ + priv->bp_count = count; + err = dpa_bp_create(net_dev, dpa_bp, count); + if (err < 0) + goto bp_create_failed; + + channel = dpa_get_channel(); + + if (channel < 0) { + err = channel; + goto get_channel_failed; + } + + priv->channel = (uint16_t)channel; + + /* 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, &shared_fq_cbs, NULL); + + /* Add the FQs to the interface, and make them active */ + /* For MAC-less devices we only get here for RX frame queues + * initialization, which are the TX queues of the other + * partition. + * It is safe to rely on one partition to set the FQ taildrop + * threshold for the TX queues of the other partition + * because the ERN notifications will be received by the + * partition doing qman_enqueue. + */ + err = dpa_fqs_init(dev, &priv->dpa_fq_list, true); + if (err < 0) + goto fq_alloc_failed; + + priv->tx_headroom = DPA_DEFAULT_TX_HEADROOM; + + priv->percpu_priv = devm_alloc_percpu(dev, *priv->percpu_priv); + + if (priv->percpu_priv == NULL) { + dev_err(dev, "devm_alloc_percpu() failed\n"); + err = -ENOMEM; + goto alloc_percpu_failed; + } + for_each_possible_cpu(i) { + percpu_priv = per_cpu_ptr(priv->percpu_priv, i); + memset(percpu_priv, 0, sizeof(*percpu_priv)); + } + + err = dpa_macless_netdev_init(dpa_node, net_dev); + if (err < 0) + goto netdev_init_failed; + + dpaa_eth_sysfs_init(&net_dev->dev); + + pr_info("fsl_dpa_macless: Probed %s interface as %s\n", + priv->if_type, net_dev->name); + + return 0; + +netdev_init_failed: +alloc_percpu_failed: +fq_alloc_failed: + if (net_dev) + dpa_fq_free(dev, &priv->dpa_fq_list); +add_channel_failed: +get_channel_failed: + if (net_dev) + dpa_bp_free(priv); +bp_create_failed: +fq_probe_failed: + dev_set_drvdata(dev, NULL); + if (net_dev) + free_netdev(net_dev); + + return err; +} + +static int __init __cold dpa_macless_load(void) +{ + int _errno; + + pr_info(DPA_DESCRIPTION "\n"); + + /* Initialize 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_macless_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_macless_load); + +static void __exit __cold dpa_macless_unload(void) +{ + platform_driver_unregister(&dpa_macless_driver); + + pr_debug(KBUILD_MODNAME ": %s:%s() ->\n", + KBUILD_BASENAME".c", __func__); +} +module_exit(dpa_macless_unload); -- cgit v1.2.3