--- /dev/null
+/*
+ * Keystone NetCP Core driver
+ *
+ * Copyright (C) 2014 Texas Instruments Incorporated
+ * Authors: Sandeep Nair <sandeep_n@ti.com>
+ * Sandeep Paulraj <s-paulraj@ti.com>
+ * Cyril Chemparathy <cyril@ti.com>
+ * Santosh Shilimkar <santosh.shilimkar@ti.com>
+ * Murali Karicheri <m-karicheri2@ti.com>
+ * Wingman Kwok <w-kwok2@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_net.h>
+#include <linux/of_address.h>
+#include <linux/if_vlan.h>
+#include <linux/pm_runtime.h>
+#include <linux/platform_device.h>
+#include <linux/soc/ti/knav_qmss.h>
+#include <linux/soc/ti/knav_dma.h>
+
+#include "netcp.h"
+
+#define NETCP_SOP_OFFSET (NET_IP_ALIGN + NET_SKB_PAD)
+#define NETCP_NAPI_WEIGHT 64
+#define NETCP_TX_TIMEOUT (5 * HZ)
+#define NETCP_MIN_PACKET_SIZE ETH_ZLEN
+#define NETCP_MAX_MCAST_ADDR 16
+
+#define NETCP_EFUSE_REG_INDEX 0
+
+#define NETCP_MOD_PROBE_SKIPPED 1
+#define NETCP_MOD_PROBE_FAILED 2
+
+#define NETCP_DEBUG (NETIF_MSG_HW | NETIF_MSG_WOL | \
+ NETIF_MSG_DRV | NETIF_MSG_LINK | \
+ NETIF_MSG_IFUP | NETIF_MSG_INTR | \
+ NETIF_MSG_PROBE | NETIF_MSG_TIMER | \
+ NETIF_MSG_IFDOWN | NETIF_MSG_RX_ERR | \
+ NETIF_MSG_TX_ERR | NETIF_MSG_TX_DONE | \
+ NETIF_MSG_PKTDATA | NETIF_MSG_TX_QUEUED | \
+ NETIF_MSG_RX_STATUS)
+
+#define knav_queue_get_id(q) knav_queue_device_control(q, \
+ KNAV_QUEUE_GET_ID, (unsigned long)NULL)
+
+#define knav_queue_enable_notify(q) knav_queue_device_control(q, \
+ KNAV_QUEUE_ENABLE_NOTIFY, \
+ (unsigned long)NULL)
+
+#define knav_queue_disable_notify(q) knav_queue_device_control(q, \
+ KNAV_QUEUE_DISABLE_NOTIFY, \
+ (unsigned long)NULL)
+
+#define knav_queue_get_count(q) knav_queue_device_control(q, \
+ KNAV_QUEUE_GET_COUNT, (unsigned long)NULL)
+
+#define for_each_netcp_module(module) \
+ list_for_each_entry(module, &netcp_modules, module_list)
+
+#define for_each_netcp_device_module(netcp_device, inst_modpriv) \
+ list_for_each_entry(inst_modpriv, \
+ &((netcp_device)->modpriv_head), inst_list)
+
+#define for_each_module(netcp, intf_modpriv) \
+ list_for_each_entry(intf_modpriv, &netcp->module_head, intf_list)
+
+/* Module management structures */
+struct netcp_device {
+ struct list_head device_list;
+ struct list_head interface_head;
+ struct list_head modpriv_head;
+ struct device *device;
+};
+
+struct netcp_inst_modpriv {
+ struct netcp_device *netcp_device;
+ struct netcp_module *netcp_module;
+ struct list_head inst_list;
+ void *module_priv;
+};
+
+struct netcp_intf_modpriv {
+ struct netcp_intf *netcp_priv;
+ struct netcp_module *netcp_module;
+ struct list_head intf_list;
+ void *module_priv;
+};
+
+static LIST_HEAD(netcp_devices);
+static LIST_HEAD(netcp_modules);
+static DEFINE_MUTEX(netcp_modules_lock);
+
+static int netcp_debug_level = -1;
+module_param(netcp_debug_level, int, 0);
+MODULE_PARM_DESC(netcp_debug_level, "Netcp debug level (NETIF_MSG bits) (0=none,...,16=all)");
+
+/* Helper functions - Get/Set */
+static void get_pkt_info(u32 *buff, u32 *buff_len, u32 *ndesc,
+ struct knav_dma_desc *desc)
+{
+ *buff_len = desc->buff_len;
+ *buff = desc->buff;
+ *ndesc = desc->next_desc;
+}
+
+static void get_pad_info(u32 *pad0, u32 *pad1, struct knav_dma_desc *desc)
+{
+ *pad0 = desc->pad[0];
+ *pad1 = desc->pad[1];
+}
+
+static void get_org_pkt_info(u32 *buff, u32 *buff_len,
+ struct knav_dma_desc *desc)
+{
+ *buff = desc->orig_buff;
+ *buff_len = desc->orig_len;
+}
+
+static void get_words(u32 *words, int num_words, u32 *desc)
+{
+ int i;
+
+ for (i = 0; i < num_words; i++)
+ words[i] = desc[i];
+}
+
+static void set_pkt_info(u32 buff, u32 buff_len, u32 ndesc,
+ struct knav_dma_desc *desc)
+{
+ desc->buff_len = buff_len;
+ desc->buff = buff;
+ desc->next_desc = ndesc;
+}
+
+static void set_desc_info(u32 desc_info, u32 pkt_info,
+ struct knav_dma_desc *desc)
+{
+ desc->desc_info = desc_info;
+ desc->packet_info = pkt_info;
+}
+
+static void set_pad_info(u32 pad0, u32 pad1, struct knav_dma_desc *desc)
+{
+ desc->pad[0] = pad0;
+ desc->pad[1] = pad1;
+}
+
+static void set_org_pkt_info(u32 buff, u32 buff_len,
+ struct knav_dma_desc *desc)
+{
+ desc->orig_buff = buff;
+ desc->orig_len = buff_len;
+}
+
+static void set_words(u32 *words, int num_words, u32 *desc)
+{
+ int i;
+
+ for (i = 0; i < num_words; i++)
+ desc[i] = words[i];
+}
+
+/* Read the e-fuse value as 32 bit values to be endian independent */
+static int emac_arch_get_mac_addr(char *x, void __iomem *efuse_mac)
+{
+ unsigned int addr0, addr1;
+
+ addr1 = readl(efuse_mac + 4);
+ addr0 = readl(efuse_mac);
+
+ x[0] = (addr1 & 0x0000ff00) >> 8;
+ x[1] = addr1 & 0x000000ff;
+ x[2] = (addr0 & 0xff000000) >> 24;
+ x[3] = (addr0 & 0x00ff0000) >> 16;
+ x[4] = (addr0 & 0x0000ff00) >> 8;
+ x[5] = addr0 & 0x000000ff;
+
+ return 0;
+}
+
+static const char *netcp_node_name(struct device_node *node)
+{
+ const char *name;
+
+ if (of_property_read_string(node, "label", &name) < 0)
+ name = node->name;
+ if (!name)
+ name = "unknown";
+ return name;
+}
+
+/* Module management routines */
+static int netcp_register_interface(struct netcp_intf *netcp)
+{
+ int ret;
+
+ ret = register_netdev(netcp->ndev);
+ if (!ret)
+ netcp->netdev_registered = true;
+ return ret;
+}
+
+static int netcp_module_probe(struct netcp_device *netcp_device,
+ struct netcp_module *module)
+{
+ struct device *dev = netcp_device->device;
+ struct device_node *devices, *interface, *node = dev->of_node;
+ struct device_node *child;
+ struct netcp_inst_modpriv *inst_modpriv;
+ struct netcp_intf *netcp_intf;
+ struct netcp_module *tmp;
+ bool primary_module_registered = false;
+ int ret;
+
+ /* Find this module in the sub-tree for this device */
+ devices = of_get_child_by_name(node, "netcp-devices");
+ if (!devices) {
+ dev_err(dev, "could not find netcp-devices node\n");
+ return NETCP_MOD_PROBE_SKIPPED;
+ }
+
+ for_each_available_child_of_node(devices, child) {
+ const char *name = netcp_node_name(child);
+
+ if (!strcasecmp(module->name, name))
+ break;
+ }
+
+ of_node_put(devices);
+ /* If module not used for this device, skip it */
+ if (!child) {
+ dev_warn(dev, "module(%s) not used for device\n", module->name);
+ return NETCP_MOD_PROBE_SKIPPED;
+ }
+
+ inst_modpriv = devm_kzalloc(dev, sizeof(*inst_modpriv), GFP_KERNEL);
+ if (!inst_modpriv) {
+ of_node_put(child);
+ return -ENOMEM;
+ }
+
+ inst_modpriv->netcp_device = netcp_device;
+ inst_modpriv->netcp_module = module;
+ list_add_tail(&inst_modpriv->inst_list, &netcp_device->modpriv_head);
+
+ ret = module->probe(netcp_device, dev, child,
+ &inst_modpriv->module_priv);
+ of_node_put(child);
+ if (ret) {
+ dev_err(dev, "Probe of module(%s) failed with %d\n",
+ module->name, ret);
+ list_del(&inst_modpriv->inst_list);
+ devm_kfree(dev, inst_modpriv);
+ return NETCP_MOD_PROBE_FAILED;
+ }
+
+ /* Attach modules only if the primary module is probed */
+ for_each_netcp_module(tmp) {
+ if (tmp->primary)
+ primary_module_registered = true;
+ }
+
+ if (!primary_module_registered)
+ return 0;
+
+ /* Attach module to interfaces */
+ list_for_each_entry(netcp_intf, &netcp_device->interface_head,
+ interface_list) {
+ struct netcp_intf_modpriv *intf_modpriv;
+
+ /* If interface not registered then register now */
+ if (!netcp_intf->netdev_registered)
+ ret = netcp_register_interface(netcp_intf);
+
+ if (ret)
+ return -ENODEV;
+
+ intf_modpriv = devm_kzalloc(dev, sizeof(*intf_modpriv),
+ GFP_KERNEL);
+ if (!intf_modpriv)
+ return -ENOMEM;
+
+ interface = of_parse_phandle(netcp_intf->node_interface,
+ module->name, 0);
+
+ intf_modpriv->netcp_priv = netcp_intf;
+ intf_modpriv->netcp_module = module;
+ list_add_tail(&intf_modpriv->intf_list,
+ &netcp_intf->module_head);
+
+ ret = module->attach(inst_modpriv->module_priv,
+ netcp_intf->ndev, interface,
+ &intf_modpriv->module_priv);
+ of_node_put(interface);
+ if (ret) {
+ dev_dbg(dev, "Attach of module %s declined with %d\n",
+ module->name, ret);
+ list_del(&intf_modpriv->intf_list);
+ devm_kfree(dev, intf_modpriv);
+ continue;
+ }
+ }
+ return 0;
+}
+
+int netcp_register_module(struct netcp_module *module)
+{
+ struct netcp_device *netcp_device;
+ struct netcp_module *tmp;
+ int ret;
+
+ if (!module->name) {
+ WARN(1, "error registering netcp module: no name\n");
+ return -EINVAL;
+ }
+
+ if (!module->probe) {
+ WARN(1, "error registering netcp module: no probe\n");
+ return -EINVAL;
+ }
+
+ mutex_lock(&netcp_modules_lock);
+
+ for_each_netcp_module(tmp) {
+ if (!strcasecmp(tmp->name, module->name)) {
+ mutex_unlock(&netcp_modules_lock);
+ return -EEXIST;
+ }
+ }
+ list_add_tail(&module->module_list, &netcp_modules);
+
+ list_for_each_entry(netcp_device, &netcp_devices, device_list) {
+ ret = netcp_module_probe(netcp_device, module);
+ if (ret < 0)
+ goto fail;
+ }
+
+ mutex_unlock(&netcp_modules_lock);
+ return 0;
+
+fail:
+ mutex_unlock(&netcp_modules_lock);
+ netcp_unregister_module(module);
+ return ret;
+}
+
+static void netcp_release_module(struct netcp_device *netcp_device,
+ struct netcp_module *module)
+{
+ struct netcp_inst_modpriv *inst_modpriv, *inst_tmp;
+ struct netcp_intf *netcp_intf, *netcp_tmp;
+ struct device *dev = netcp_device->device;
+
+ /* Release the module from each interface */
+ list_for_each_entry_safe(netcp_intf, netcp_tmp,
+ &netcp_device->interface_head,
+ interface_list) {
+ struct netcp_intf_modpriv *intf_modpriv, *intf_tmp;
+
+ list_for_each_entry_safe(intf_modpriv, intf_tmp,
+ &netcp_intf->module_head,
+ intf_list) {
+ if (intf_modpriv->netcp_module == module) {
+ module->release(intf_modpriv->module_priv);
+ list_del(&intf_modpriv->intf_list);
+ devm_kfree(dev, intf_modpriv);
+ break;
+ }
+ }
+ }
+
+ /* Remove the module from each instance */
+ list_for_each_entry_safe(inst_modpriv, inst_tmp,
+ &netcp_device->modpriv_head, inst_list) {
+ if (inst_modpriv->netcp_module == module) {
+ module->remove(netcp_device,
+ inst_modpriv->module_priv);
+ list_del(&inst_modpriv->inst_list);
+ devm_kfree(dev, inst_modpriv);
+ break;
+ }
+ }
+}
+
+void netcp_unregister_module(struct netcp_module *module)
+{
+ struct netcp_device *netcp_device;
+ struct netcp_module *module_tmp;
+
+ mutex_lock(&netcp_modules_lock);
+
+ list_for_each_entry(netcp_device, &netcp_devices, device_list) {
+ netcp_release_module(netcp_device, module);
+ }
+
+ /* Remove the module from the module list */
+ for_each_netcp_module(module_tmp) {
+ if (module == module_tmp) {
+ list_del(&module->module_list);
+ break;
+ }
+ }
+
+ mutex_unlock(&netcp_modules_lock);
+}
+
+void *netcp_module_get_intf_data(struct netcp_module *module,
+ struct netcp_intf *intf)
+{
+ struct netcp_intf_modpriv *intf_modpriv;
+
+ list_for_each_entry(intf_modpriv, &intf->module_head, intf_list)
+ if (intf_modpriv->netcp_module == module)
+ return intf_modpriv->module_priv;
+ return NULL;
+}
+
+/* Module TX and RX Hook management */
+struct netcp_hook_list {
+ struct list_head list;
+ netcp_hook_rtn *hook_rtn;
+ void *hook_data;
+ int order;
+};
+
+int netcp_register_txhook(struct netcp_intf *netcp_priv, int order,
+ netcp_hook_rtn *hook_rtn, void *hook_data)
+{
+ struct netcp_hook_list *entry;
+ struct netcp_hook_list *next;
+ unsigned long flags;
+
+ entry = devm_kzalloc(netcp_priv->dev, sizeof(*entry), GFP_KERNEL);
+ if (!entry)
+ return -ENOMEM;
+
+ entry->hook_rtn = hook_rtn;
+ entry->hook_data = hook_data;
+ entry->order = order;
+
+ spin_lock_irqsave(&netcp_priv->lock, flags);
+ list_for_each_entry(next, &netcp_priv->txhook_list_head, list) {
+ if (next->order > order)
+ break;
+ }
+ __list_add(&entry->list, next->list.prev, &next->list);
+ spin_unlock_irqrestore(&netcp_priv->lock, flags);
+
+ return 0;
+}
+
+int netcp_unregister_txhook(struct netcp_intf *netcp_priv, int order,
+ netcp_hook_rtn *hook_rtn, void *hook_data)
+{
+ struct netcp_hook_list *next, *n;
+ unsigned long flags;
+
+ spin_lock_irqsave(&netcp_priv->lock, flags);
+ list_for_each_entry_safe(next, n, &netcp_priv->txhook_list_head, list) {
+ if ((next->order == order) &&
+ (next->hook_rtn == hook_rtn) &&
+ (next->hook_data == hook_data)) {
+ list_del(&next->list);
+ spin_unlock_irqrestore(&netcp_priv->lock, flags);
+ devm_kfree(netcp_priv->dev, next);
+ return 0;
+ }
+ }
+ spin_unlock_irqrestore(&netcp_priv->lock, flags);
+ return -ENOENT;
+}
+
+int netcp_register_rxhook(struct netcp_intf *netcp_priv, int order,
+ netcp_hook_rtn *hook_rtn, void *hook_data)
+{
+ struct netcp_hook_list *entry;
+ struct netcp_hook_list *next;
+ unsigned long flags;
+
+ entry = devm_kzalloc(netcp_priv->dev, sizeof(*entry), GFP_KERNEL);
+ if (!entry)
+ return -ENOMEM;
+
+ entry->hook_rtn = hook_rtn;
+ entry->hook_data = hook_data;
+ entry->order = order;
+
+ spin_lock_irqsave(&netcp_priv->lock, flags);
+ list_for_each_entry(next, &netcp_priv->rxhook_list_head, list) {
+ if (next->order > order)
+ break;
+ }
+ __list_add(&entry->list, next->list.prev, &next->list);
+ spin_unlock_irqrestore(&netcp_priv->lock, flags);
+
+ return 0;
+}
+
+int netcp_unregister_rxhook(struct netcp_intf *netcp_priv, int order,
+ netcp_hook_rtn *hook_rtn, void *hook_data)
+{
+ struct netcp_hook_list *next, *n;
+ unsigned long flags;
+
+ spin_lock_irqsave(&netcp_priv->lock, flags);
+ list_for_each_entry_safe(next, n, &netcp_priv->rxhook_list_head, list) {
+ if ((next->order == order) &&
+ (next->hook_rtn == hook_rtn) &&
+ (next->hook_data == hook_data)) {
+ list_del(&next->list);
+ spin_unlock_irqrestore(&netcp_priv->lock, flags);
+ devm_kfree(netcp_priv->dev, next);
+ return 0;
+ }
+ }
+ spin_unlock_irqrestore(&netcp_priv->lock, flags);
+
+ return -ENOENT;
+}
+
+static void netcp_frag_free(bool is_frag, void *ptr)
+{
+ if (is_frag)
+ put_page(virt_to_head_page(ptr));
+ else
+ kfree(ptr);
+}
+
+static void netcp_free_rx_desc_chain(struct netcp_intf *netcp,
+ struct knav_dma_desc *desc)
+{
+ struct knav_dma_desc *ndesc;
+ dma_addr_t dma_desc, dma_buf;
+ unsigned int buf_len, dma_sz = sizeof(*ndesc);
+ void *buf_ptr;
+ u32 tmp;
+
+ get_words(&dma_desc, 1, &desc->next_desc);
+
+ while (dma_desc) {
+ ndesc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz);
+ if (unlikely(!ndesc)) {
+ dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");
+ break;
+ }
+ get_pkt_info(&dma_buf, &tmp, &dma_desc, ndesc);
+ get_pad_info((u32 *)&buf_ptr, &tmp, ndesc);
+ dma_unmap_page(netcp->dev, dma_buf, PAGE_SIZE, DMA_FROM_DEVICE);
+ __free_page(buf_ptr);
+ knav_pool_desc_put(netcp->rx_pool, desc);
+ }
+
+ get_pad_info((u32 *)&buf_ptr, &buf_len, desc);
+ if (buf_ptr)
+ netcp_frag_free(buf_len <= PAGE_SIZE, buf_ptr);
+ knav_pool_desc_put(netcp->rx_pool, desc);
+}
+
+static void netcp_empty_rx_queue(struct netcp_intf *netcp)
+{
+ struct knav_dma_desc *desc;
+ unsigned int dma_sz;
+ dma_addr_t dma;
+
+ for (; ;) {
+ dma = knav_queue_pop(netcp->rx_queue, &dma_sz);
+ if (!dma)
+ break;
+
+ desc = knav_pool_desc_unmap(netcp->rx_pool, dma, dma_sz);
+ if (unlikely(!desc)) {
+ dev_err(netcp->ndev_dev, "%s: failed to unmap Rx desc\n",
+ __func__);
+ netcp->ndev->stats.rx_errors++;
+ continue;
+ }
+ netcp_free_rx_desc_chain(netcp, desc);
+ netcp->ndev->stats.rx_dropped++;
+ }
+}
+
+static int netcp_process_one_rx_packet(struct netcp_intf *netcp)
+{
+ unsigned int dma_sz, buf_len, org_buf_len;
+ struct knav_dma_desc *desc, *ndesc;
+ unsigned int pkt_sz = 0, accum_sz;
+ struct netcp_hook_list *rx_hook;
+ dma_addr_t dma_desc, dma_buff;
+ struct netcp_packet p_info;
+ struct sk_buff *skb;
+ void *org_buf_ptr;
+ u32 tmp;
+
+ dma_desc = knav_queue_pop(netcp->rx_queue, &dma_sz);
+ if (!dma_desc)
+ return -1;
+
+ desc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz);
+ if (unlikely(!desc)) {
+ dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");
+ return 0;
+ }
+
+ get_pkt_info(&dma_buff, &buf_len, &dma_desc, desc);
+ get_pad_info((u32 *)&org_buf_ptr, &org_buf_len, desc);
+
+ if (unlikely(!org_buf_ptr)) {
+ dev_err(netcp->ndev_dev, "NULL bufptr in desc\n");
+ goto free_desc;
+ }
+
+ pkt_sz &= KNAV_DMA_DESC_PKT_LEN_MASK;
+ accum_sz = buf_len;
+ dma_unmap_single(netcp->dev, dma_buff, buf_len, DMA_FROM_DEVICE);
+
+ /* Build a new sk_buff for the primary buffer */
+ skb = build_skb(org_buf_ptr, org_buf_len);
+ if (unlikely(!skb)) {
+ dev_err(netcp->ndev_dev, "build_skb() failed\n");
+ goto free_desc;
+ }
+
+ /* update data, tail and len */
+ skb_reserve(skb, NETCP_SOP_OFFSET);
+ __skb_put(skb, buf_len);
+
+ /* Fill in the page fragment list */
+ while (dma_desc) {
+ struct page *page;
+
+ ndesc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz);
+ if (unlikely(!ndesc)) {
+ dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");
+ goto free_desc;
+ }
+
+ get_pkt_info(&dma_buff, &buf_len, &dma_desc, ndesc);
+ get_pad_info((u32 *)&page, &tmp, ndesc);
+
+ if (likely(dma_buff && buf_len && page)) {
+ dma_unmap_page(netcp->dev, dma_buff, PAGE_SIZE,
+ DMA_FROM_DEVICE);
+ } else {
+ dev_err(netcp->ndev_dev, "Bad Rx desc dma_buff(%p), len(%d), page(%p)\n",
+ (void *)dma_buff, buf_len, page);
+ goto free_desc;
+ }
+
+ skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
+ offset_in_page(dma_buff), buf_len, PAGE_SIZE);
+ accum_sz += buf_len;
+
+ /* Free the descriptor */
+ knav_pool_desc_put(netcp->rx_pool, ndesc);
+ }
+
+ /* Free the primary descriptor */
+ knav_pool_desc_put(netcp->rx_pool, desc);
+
+ /* check for packet len and warn */
+ if (unlikely(pkt_sz != accum_sz))
+ dev_dbg(netcp->ndev_dev, "mismatch in packet size(%d) & sum of fragments(%d)\n",
+ pkt_sz, accum_sz);
+
+ /* Remove ethernet FCS from the packet */
+ __pskb_trim(skb, skb->len - ETH_FCS_LEN);
+
+ /* Call each of the RX hooks */
+ p_info.skb = skb;
+ p_info.rxtstamp_complete = false;
+ list_for_each_entry(rx_hook, &netcp->rxhook_list_head, list) {
+ int ret;
+
+ ret = rx_hook->hook_rtn(rx_hook->order, rx_hook->hook_data,
+ &p_info);
+ if (unlikely(ret)) {
+ dev_err(netcp->ndev_dev, "RX hook %d failed: %d\n",
+ rx_hook->order, ret);
+ netcp->ndev->stats.rx_errors++;
+ dev_kfree_skb(skb);
+ return 0;
+ }
+ }
+
+ netcp->ndev->last_rx = jiffies;
+ netcp->ndev->stats.rx_packets++;
+ netcp->ndev->stats.rx_bytes += skb->len;
+
+ /* push skb up the stack */
+ skb->protocol = eth_type_trans(skb, netcp->ndev);
+ netif_receive_skb(skb);
+ return 0;
+
+free_desc:
+ netcp_free_rx_desc_chain(netcp, desc);
+ netcp->ndev->stats.rx_errors++;
+ return 0;
+}
+
+static int netcp_process_rx_packets(struct netcp_intf *netcp,
+ unsigned int budget)
+{
+ int i;
+
+ for (i = 0; (i < budget) && !netcp_process_one_rx_packet(netcp); i++)
+ ;
+ return i;
+}
+
+/* Release descriptors and attached buffers from Rx FDQ */
+static void netcp_free_rx_buf(struct netcp_intf *netcp, int fdq)
+{
+ struct knav_dma_desc *desc;
+ unsigned int buf_len, dma_sz;
+ dma_addr_t dma;
+ void *buf_ptr;
+ u32 tmp;
+
+ /* Allocate descriptor */
+ while ((dma = knav_queue_pop(netcp->rx_fdq[fdq], &dma_sz))) {
+ desc = knav_pool_desc_unmap(netcp->rx_pool, dma, dma_sz);
+ if (unlikely(!desc)) {
+ dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n");
+ continue;
+ }
+
+ get_org_pkt_info(&dma, &buf_len, desc);
+ get_pad_info((u32 *)&buf_ptr, &tmp, desc);
+
+ if (unlikely(!dma)) {
+ dev_err(netcp->ndev_dev, "NULL orig_buff in desc\n");
+ knav_pool_desc_put(netcp->rx_pool, desc);
+ continue;
+ }
+
+ if (unlikely(!buf_ptr)) {
+ dev_err(netcp->ndev_dev, "NULL bufptr in desc\n");
+ knav_pool_desc_put(netcp->rx_pool, desc);
+ continue;
+ }
+
+ if (fdq == 0) {
+ dma_unmap_single(netcp->dev, dma, buf_len,
+ DMA_FROM_DEVICE);
+ netcp_frag_free((buf_len <= PAGE_SIZE), buf_ptr);
+ } else {
+ dma_unmap_page(netcp->dev, dma, buf_len,
+ DMA_FROM_DEVICE);
+ __free_page(buf_ptr);
+ }
+
+ knav_pool_desc_put(netcp->rx_pool, desc);
+ }
+}
+
+static void netcp_rxpool_free(struct netcp_intf *netcp)
+{
+ int i;
+
+ for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN &&
+ !IS_ERR_OR_NULL(netcp->rx_fdq[i]); i++)
+ netcp_free_rx_buf(netcp, i);
+
+ if (knav_pool_count(netcp->rx_pool) != netcp->rx_pool_size)
+ dev_err(netcp->ndev_dev, "Lost Rx (%d) descriptors\n",
+ netcp->rx_pool_size - knav_pool_count(netcp->rx_pool));
+
+ knav_pool_destroy(netcp->rx_pool);
+ netcp->rx_pool = NULL;
+}
+
+static void netcp_allocate_rx_buf(struct netcp_intf *netcp, int fdq)
+{
+ struct knav_dma_desc *hwdesc;
+ unsigned int buf_len, dma_sz;
+ u32 desc_info, pkt_info;
+ struct page *page;
+ dma_addr_t dma;
+ void *bufptr;
+ u32 pad[2];
+
+ /* Allocate descriptor */
+ hwdesc = knav_pool_desc_get(netcp->rx_pool);
+ if (IS_ERR_OR_NULL(hwdesc)) {
+ dev_dbg(netcp->ndev_dev, "out of rx pool desc\n");
+ return;
+ }
+
+ if (likely(fdq == 0)) {
+ unsigned int primary_buf_len;
+ /* Allocate a primary receive queue entry */
+ buf_len = netcp->rx_buffer_sizes[0] + NETCP_SOP_OFFSET;
+ primary_buf_len = SKB_DATA_ALIGN(buf_len) +
+ SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
+
+ if (primary_buf_len <= PAGE_SIZE) {
+ bufptr = netdev_alloc_frag(primary_buf_len);
+ pad[1] = primary_buf_len;
+ } else {
+ bufptr = kmalloc(primary_buf_len, GFP_ATOMIC |
+ GFP_DMA32 | __GFP_COLD);
+ pad[1] = 0;
+ }
+
+ if (unlikely(!bufptr)) {
+ dev_warn_ratelimited(netcp->ndev_dev, "Primary RX buffer alloc failed\n");
+ goto fail;
+ }
+ dma = dma_map_single(netcp->dev, bufptr, buf_len,
+ DMA_TO_DEVICE);
+ pad[0] = (u32)bufptr;
+
+ } else {
+ /* Allocate a secondary receive queue entry */
+ page = alloc_page(GFP_ATOMIC | GFP_DMA32 | __GFP_COLD);
+ if (unlikely(!page)) {
+ dev_warn_ratelimited(netcp->ndev_dev, "Secondary page alloc failed\n");
+ goto fail;
+ }
+ buf_len = PAGE_SIZE;
+ dma = dma_map_page(netcp->dev, page, 0, buf_len, DMA_TO_DEVICE);
+ pad[0] = (u32)page;
+ pad[1] = 0;
+ }
+
+ desc_info = KNAV_DMA_DESC_PS_INFO_IN_DESC;
+ desc_info |= buf_len & KNAV_DMA_DESC_PKT_LEN_MASK;
+ pkt_info = KNAV_DMA_DESC_HAS_EPIB;
+ pkt_info |= KNAV_DMA_NUM_PS_WORDS << KNAV_DMA_DESC_PSLEN_SHIFT;
+ pkt_info |= (netcp->rx_queue_id & KNAV_DMA_DESC_RETQ_MASK) <<
+ KNAV_DMA_DESC_RETQ_SHIFT;
+ set_org_pkt_info(dma, buf_len, hwdesc);
+ set_pad_info(pad[0], pad[1], hwdesc);
+ set_desc_info(desc_info, pkt_info, hwdesc);
+
+ /* Push to FDQs */
+ knav_pool_desc_map(netcp->rx_pool, hwdesc, sizeof(*hwdesc), &dma,
+ &dma_sz);
+ knav_queue_push(netcp->rx_fdq[fdq], dma, sizeof(*hwdesc), 0);
+ return;
+
+fail:
+ knav_pool_desc_put(netcp->rx_pool, hwdesc);
+}
+
+/* Refill Rx FDQ with descriptors & attached buffers */
+static void netcp_rxpool_refill(struct netcp_intf *netcp)
+{
+ u32 fdq_deficit[KNAV_DMA_FDQ_PER_CHAN] = {0};
+ int i;
+
+ /* Calculate the FDQ deficit and refill */
+ for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN && netcp->rx_fdq[i]; i++) {
+ fdq_deficit[i] = netcp->rx_queue_depths[i] -
+ knav_queue_get_count(netcp->rx_fdq[i]);
+
+ while (fdq_deficit[i]--)
+ netcp_allocate_rx_buf(netcp, i);
+ } /* end for fdqs */
+}
+
+/* NAPI poll */
+static int netcp_rx_poll(struct napi_struct *napi, int budget)
+{
+ struct netcp_intf *netcp = container_of(napi, struct netcp_intf,
+ rx_napi);
+ unsigned int packets;
+
+ packets = netcp_process_rx_packets(netcp, budget);
+
+ if (packets < budget) {
+ napi_complete(&netcp->rx_napi);
+ knav_queue_enable_notify(netcp->rx_queue);
+ }
+
+ netcp_rxpool_refill(netcp);
+ return packets;
+}
+
+static void netcp_rx_notify(void *arg)
+{
+ struct netcp_intf *netcp = arg;
+
+ knav_queue_disable_notify(netcp->rx_queue);
+ napi_schedule(&netcp->rx_napi);
+}
+
+static void netcp_free_tx_desc_chain(struct netcp_intf *netcp,
+ struct knav_dma_desc *desc,
+ unsigned int desc_sz)
+{
+ struct knav_dma_desc *ndesc = desc;
+ dma_addr_t dma_desc, dma_buf;
+ unsigned int buf_len;
+
+ while (ndesc) {
+ get_pkt_info(&dma_buf, &buf_len, &dma_desc, ndesc);
+
+ if (dma_buf && buf_len)
+ dma_unmap_single(netcp->dev, dma_buf, buf_len,
+ DMA_TO_DEVICE);
+ else
+ dev_warn(netcp->ndev_dev, "bad Tx desc buf(%p), len(%d)\n",
+ (void *)dma_buf, buf_len);
+
+ knav_pool_desc_put(netcp->tx_pool, ndesc);
+ ndesc = NULL;
+ if (dma_desc) {
+ ndesc = knav_pool_desc_unmap(netcp->tx_pool, dma_desc,
+ desc_sz);
+ if (!ndesc)
+ dev_err(netcp->ndev_dev, "failed to unmap Tx desc\n");
+ }
+ }
+}
+
+static int netcp_process_tx_compl_packets(struct netcp_intf *netcp,
+ unsigned int budget)
+{
+ struct knav_dma_desc *desc;
+ struct sk_buff *skb;
+ unsigned int dma_sz;
+ dma_addr_t dma;
+ int pkts = 0;
+ u32 tmp;
+
+ while (budget--) {
+ dma = knav_queue_pop(netcp->tx_compl_q, &dma_sz);
+ if (!dma)
+ break;
+ desc = knav_pool_desc_unmap(netcp->tx_pool, dma, dma_sz);
+ if (unlikely(!desc)) {
+ dev_err(netcp->ndev_dev, "failed to unmap Tx desc\n");
+ netcp->ndev->stats.tx_errors++;
+ continue;
+ }
+
+ get_pad_info((u32 *)&skb, &tmp, desc);
+ netcp_free_tx_desc_chain(netcp, desc, dma_sz);
+ if (!skb) {
+ dev_err(netcp->ndev_dev, "No skb in Tx desc\n");
+ netcp->ndev->stats.tx_errors++;
+ continue;
+ }
+
+ if (netif_subqueue_stopped(netcp->ndev, skb) &&
+ netif_running(netcp->ndev) &&
+ (knav_pool_count(netcp->tx_pool) >
+ netcp->tx_resume_threshold)) {
+ u16 subqueue = skb_get_queue_mapping(skb);
+
+ netif_wake_subqueue(netcp->ndev, subqueue);
+ }
+
+ netcp->ndev->stats.tx_packets++;
+ netcp->ndev->stats.tx_bytes += skb->len;
+ dev_kfree_skb(skb);
+ pkts++;
+ }
+ return pkts;
+}
+
+static int netcp_tx_poll(struct napi_struct *napi, int budget)
+{
+ int packets;
+ struct netcp_intf *netcp = container_of(napi, struct netcp_intf,
+ tx_napi);
+
+ packets = netcp_process_tx_compl_packets(netcp, budget);
+ if (packets < budget) {
+ napi_complete(&netcp->tx_napi);
+ knav_queue_enable_notify(netcp->tx_compl_q);
+ }
+
+ return packets;
+}
+
+static void netcp_tx_notify(void *arg)
+{
+ struct netcp_intf *netcp = arg;
+
+ knav_queue_disable_notify(netcp->tx_compl_q);
+ napi_schedule(&netcp->tx_napi);
+}
+
+static struct knav_dma_desc*
+netcp_tx_map_skb(struct sk_buff *skb, struct netcp_intf *netcp)
+{
+ struct knav_dma_desc *desc, *ndesc, *pdesc;
+ unsigned int pkt_len = skb_headlen(skb);
+ struct device *dev = netcp->dev;
+ dma_addr_t dma_addr;
+ unsigned int dma_sz;
+ int i;
+
+ /* Map the linear buffer */
+ dma_addr = dma_map_single(dev, skb->data, pkt_len, DMA_TO_DEVICE);
+ if (unlikely(!dma_addr)) {
+ dev_err(netcp->ndev_dev, "Failed to map skb buffer\n");
+ return NULL;
+ }
+
+ desc = knav_pool_desc_get(netcp->tx_pool);
+ if (unlikely(IS_ERR_OR_NULL(desc))) {
+ dev_err(netcp->ndev_dev, "out of TX desc\n");
+ dma_unmap_single(dev, dma_addr, pkt_len, DMA_TO_DEVICE);
+ return NULL;
+ }
+
+ set_pkt_info(dma_addr, pkt_len, 0, desc);
+ if (skb_is_nonlinear(skb)) {
+ prefetchw(skb_shinfo(skb));
+ } else {
+ desc->next_desc = 0;
+ goto upd_pkt_len;
+ }
+
+ pdesc = desc;
+
+ /* Handle the case where skb is fragmented in pages */
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+ skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+ struct page *page = skb_frag_page(frag);
+ u32 page_offset = frag->page_offset;
+ u32 buf_len = skb_frag_size(frag);
+ dma_addr_t desc_dma;
+ u32 pkt_info;
+
+ dma_addr = dma_map_page(dev, page, page_offset, buf_len,
+ DMA_TO_DEVICE);
+ if (unlikely(!dma_addr)) {
+ dev_err(netcp->ndev_dev, "Failed to map skb page\n");
+ goto free_descs;
+ }
+
+ ndesc = knav_pool_desc_get(netcp->tx_pool);
+ if (unlikely(IS_ERR_OR_NULL(ndesc))) {
+ dev_err(netcp->ndev_dev, "out of TX desc for frags\n");
+ dma_unmap_page(dev, dma_addr, buf_len, DMA_TO_DEVICE);
+ goto free_descs;
+ }
+
+ desc_dma = knav_pool_desc_virt_to_dma(netcp->tx_pool,
+ (void *)ndesc);
+ pkt_info =
+ (netcp->tx_compl_qid & KNAV_DMA_DESC_RETQ_MASK) <<
+ KNAV_DMA_DESC_RETQ_SHIFT;
+ set_pkt_info(dma_addr, buf_len, 0, ndesc);
+ set_words(&desc_dma, 1, &pdesc->next_desc);
+ pkt_len += buf_len;
+ if (pdesc != desc)
+ knav_pool_desc_map(netcp->tx_pool, pdesc,
+ sizeof(*pdesc), &desc_dma, &dma_sz);
+ pdesc = ndesc;
+ }
+ if (pdesc != desc)
+ knav_pool_desc_map(netcp->tx_pool, pdesc, sizeof(*pdesc),
+ &dma_addr, &dma_sz);
+
+ /* frag list based linkage is not supported for now. */
+ if (skb_shinfo(skb)->frag_list) {
+ dev_err_ratelimited(netcp->ndev_dev, "NETIF_F_FRAGLIST not supported\n");
+ goto free_descs;
+ }
+
+upd_pkt_len:
+ WARN_ON(pkt_len != skb->len);
+
+ pkt_len &= KNAV_DMA_DESC_PKT_LEN_MASK;
+ set_words(&pkt_len, 1, &desc->desc_info);
+ return desc;
+
+free_descs:
+ netcp_free_tx_desc_chain(netcp, desc, sizeof(*desc));
+ return NULL;
+}
+
+static int netcp_tx_submit_skb(struct netcp_intf *netcp,
+ struct sk_buff *skb,
+ struct knav_dma_desc *desc)
+{
+ struct netcp_tx_pipe *tx_pipe = NULL;
+ struct netcp_hook_list *tx_hook;
+ struct netcp_packet p_info;
+ u32 packet_info = 0;
+ unsigned int dma_sz;
+ dma_addr_t dma;
+ int ret = 0;
+
+ p_info.netcp = netcp;
+ p_info.skb = skb;
+ p_info.tx_pipe = NULL;
+ p_info.psdata_len = 0;
+ p_info.ts_context = NULL;
+ p_info.txtstamp_complete = NULL;
+ p_info.epib = desc->epib;
+ p_info.psdata = desc->psdata;
+ memset(p_info.epib, 0, KNAV_DMA_NUM_EPIB_WORDS * sizeof(u32));
+
+ /* Find out where to inject the packet for transmission */
+ list_for_each_entry(tx_hook, &netcp->txhook_list_head, list) {
+ ret = tx_hook->hook_rtn(tx_hook->order, tx_hook->hook_data,
+ &p_info);
+ if (unlikely(ret != 0)) {
+ dev_err(netcp->ndev_dev, "TX hook %d rejected the packet with reason(%d)\n",
+ tx_hook->order, ret);
+ ret = (ret < 0) ? ret : NETDEV_TX_OK;
+ goto out;
+ }
+ }
+
+ /* Make sure some TX hook claimed the packet */
+ tx_pipe = p_info.tx_pipe;
+ if (!tx_pipe) {
+ dev_err(netcp->ndev_dev, "No TX hook claimed the packet!\n");
+ ret = -ENXIO;
+ goto out;
+ }
+
+ /* update descriptor */
+ if (p_info.psdata_len) {
+ u32 *psdata = p_info.psdata;
+
+ memmove(p_info.psdata, p_info.psdata + p_info.psdata_len,
+ p_info.psdata_len);
+ set_words(psdata, p_info.psdata_len, psdata);
+ packet_info |=
+ (p_info.psdata_len & KNAV_DMA_DESC_PSLEN_MASK) <<
+ KNAV_DMA_DESC_PSLEN_SHIFT;
+ }
+
+ packet_info |= KNAV_DMA_DESC_HAS_EPIB |
+ ((netcp->tx_compl_qid & KNAV_DMA_DESC_RETQ_MASK) <<
+ KNAV_DMA_DESC_RETQ_SHIFT) |
+ ((tx_pipe->dma_psflags & KNAV_DMA_DESC_PSFLAG_MASK) <<
+ KNAV_DMA_DESC_PSFLAG_SHIFT);
+
+ set_words(&packet_info, 1, &desc->packet_info);
+ set_words((u32 *)&skb, 1, &desc->pad[0]);
+
+ /* submit packet descriptor */
+ ret = knav_pool_desc_map(netcp->tx_pool, desc, sizeof(*desc), &dma,
+ &dma_sz);
+ if (unlikely(ret)) {
+ dev_err(netcp->ndev_dev, "%s() failed to map desc\n", __func__);
+ ret = -ENOMEM;
+ goto out;
+ }
+ skb_tx_timestamp(skb);
+ knav_queue_push(tx_pipe->dma_queue, dma, dma_sz, 0);
+
+out:
+ return ret;
+}
+
+/* Submit the packet */
+static int netcp_ndo_start_xmit(struct sk_buff *skb, struct net_device *ndev)
+{
+ struct netcp_intf *netcp = netdev_priv(ndev);
+ int subqueue = skb_get_queue_mapping(skb);
+ struct knav_dma_desc *desc;
+ int desc_count, ret = 0;
+
+ if (unlikely(skb->len <= 0)) {
+ dev_kfree_skb(skb);
+ return NETDEV_TX_OK;
+ }
+
+ if (unlikely(skb->len < NETCP_MIN_PACKET_SIZE)) {
+ ret = skb_padto(skb, NETCP_MIN_PACKET_SIZE);
+ if (ret < 0) {
+ /* If we get here, the skb has already been dropped */
+ dev_warn(netcp->ndev_dev, "padding failed (%d), packet dropped\n",
+ ret);
+ ndev->stats.tx_dropped++;
+ return ret;
+ }
+ skb->len = NETCP_MIN_PACKET_SIZE;
+ }
+
+ desc = netcp_tx_map_skb(skb, netcp);
+ if (unlikely(!desc)) {
+ netif_stop_subqueue(ndev, subqueue);
+ ret = -ENOBUFS;
+ goto drop;
+ }
+
+ ret = netcp_tx_submit_skb(netcp, skb, desc);
+ if (ret)
+ goto drop;
+
+ ndev->trans_start = jiffies;
+
+ /* Check Tx pool count & stop subqueue if needed */
+ desc_count = knav_pool_count(netcp->tx_pool);
+ if (desc_count < netcp->tx_pause_threshold) {
+ dev_dbg(netcp->ndev_dev, "pausing tx, count(%d)\n", desc_count);
+ netif_stop_subqueue(ndev, subqueue);
+ }
+ return NETDEV_TX_OK;
+
+drop:
+ ndev->stats.tx_dropped++;
+ if (desc)
+ netcp_free_tx_desc_chain(netcp, desc, sizeof(*desc));
+ dev_kfree_skb(skb);
+ return ret;
+}
+
+int netcp_txpipe_close(struct netcp_tx_pipe *tx_pipe)
+{
+ if (tx_pipe->dma_channel) {
+ knav_dma_close_channel(tx_pipe->dma_channel);
+ tx_pipe->dma_channel = NULL;
+ }
+ return 0;
+}
+
+int netcp_txpipe_open(struct netcp_tx_pipe *tx_pipe)
+{
+ struct device *dev = tx_pipe->netcp_device->device;
+ struct knav_dma_cfg config;
+ int ret = 0;
+ u8 name[16];
+
+ memset(&config, 0, sizeof(config));
+ config.direction = DMA_MEM_TO_DEV;
+ config.u.tx.filt_einfo = false;
+ config.u.tx.filt_pswords = false;
+ config.u.tx.priority = DMA_PRIO_MED_L;
+
+ tx_pipe->dma_channel = knav_dma_open_channel(dev,
+ tx_pipe->dma_chan_name, &config);
+ if (IS_ERR_OR_NULL(tx_pipe->dma_channel)) {
+ dev_err(dev, "failed opening tx chan(%s)\n",
+ tx_pipe->dma_chan_name);
+ goto err;
+ }
+
+ snprintf(name, sizeof(name), "tx-pipe-%s", dev_name(dev));
+ tx_pipe->dma_queue = knav_queue_open(name, tx_pipe->dma_queue_id,
+ KNAV_QUEUE_SHARED);
+ if (IS_ERR(tx_pipe->dma_queue)) {
+ dev_err(dev, "Could not open DMA queue for channel \"%s\": %d\n",
+ name, ret);
+ ret = PTR_ERR(tx_pipe->dma_queue);
+ goto err;
+ }
+
+ dev_dbg(dev, "opened tx pipe %s\n", name);
+ return 0;
+
+err:
+ if (!IS_ERR_OR_NULL(tx_pipe->dma_channel))
+ knav_dma_close_channel(tx_pipe->dma_channel);
+ tx_pipe->dma_channel = NULL;
+ return ret;
+}
+
+int netcp_txpipe_init(struct netcp_tx_pipe *tx_pipe,
+ struct netcp_device *netcp_device,
+ const char *dma_chan_name, unsigned int dma_queue_id)
+{
+ memset(tx_pipe, 0, sizeof(*tx_pipe));
+ tx_pipe->netcp_device = netcp_device;
+ tx_pipe->dma_chan_name = dma_chan_name;
+ tx_pipe->dma_queue_id = dma_queue_id;
+ return 0;
+}
+
+static struct netcp_addr *netcp_addr_find(struct netcp_intf *netcp,
+ const u8 *addr,
+ enum netcp_addr_type type)
+{
+ struct netcp_addr *naddr;
+
+ list_for_each_entry(naddr, &netcp->addr_list, node) {
+ if (naddr->type != type)
+ continue;
+ if (addr && memcmp(addr, naddr->addr, ETH_ALEN))
+ continue;
+ return naddr;
+ }
+
+ return NULL;
+}
+
+static struct netcp_addr *netcp_addr_add(struct netcp_intf *netcp,
+ const u8 *addr,
+ enum netcp_addr_type type)
+{
+ struct netcp_addr *naddr;
+
+ naddr = devm_kmalloc(netcp->dev, sizeof(*naddr), GFP_ATOMIC);
+ if (!naddr)
+ return NULL;
+
+ naddr->type = type;
+ naddr->flags = 0;
+ naddr->netcp = netcp;
+ if (addr)
+ ether_addr_copy(naddr->addr, addr);
+ else
+ memset(naddr->addr, 0, ETH_ALEN);
+ list_add_tail(&naddr->node, &netcp->addr_list);
+
+ return naddr;
+}
+
+static void netcp_addr_del(struct netcp_intf *netcp, struct netcp_addr *naddr)
+{
+ list_del(&naddr->node);
+ devm_kfree(netcp->dev, naddr);
+}
+
+static void netcp_addr_clear_mark(struct netcp_intf *netcp)
+{
+ struct netcp_addr *naddr;
+
+ list_for_each_entry(naddr, &netcp->addr_list, node)
+ naddr->flags = 0;
+}
+
+static void netcp_addr_add_mark(struct netcp_intf *netcp, const u8 *addr,
+ enum netcp_addr_type type)
+{
+ struct netcp_addr *naddr;
+
+ naddr = netcp_addr_find(netcp, addr, type);
+ if (naddr) {
+ naddr->flags |= ADDR_VALID;
+ return;
+ }
+
+ naddr = netcp_addr_add(netcp, addr, type);
+ if (!WARN_ON(!naddr))
+ naddr->flags |= ADDR_NEW;
+}
+
+static void netcp_addr_sweep_del(struct netcp_intf *netcp)
+{
+ struct netcp_addr *naddr, *tmp;
+ struct netcp_intf_modpriv *priv;
+ struct netcp_module *module;
+ int error;
+
+ list_for_each_entry_safe(naddr, tmp, &netcp->addr_list, node) {
+ if (naddr->flags & (ADDR_VALID | ADDR_NEW))
+ continue;
+ dev_dbg(netcp->ndev_dev, "deleting address %pM, type %x\n",
+ naddr->addr, naddr->type);
+ mutex_lock(&netcp_modules_lock);
+ for_each_module(netcp, priv) {
+ module = priv->netcp_module;
+ if (!module->del_addr)
+ continue;
+ error = module->del_addr(priv->module_priv,
+ naddr);
+ WARN_ON(error);
+ }
+ mutex_unlock(&netcp_modules_lock);
+ netcp_addr_del(netcp, naddr);
+ }
+}
+
+static void netcp_addr_sweep_add(struct netcp_intf *netcp)
+{
+ struct netcp_addr *naddr, *tmp;
+ struct netcp_intf_modpriv *priv;
+ struct netcp_module *module;
+ int error;
+
+ list_for_each_entry_safe(naddr, tmp, &netcp->addr_list, node) {
+ if (!(naddr->flags & ADDR_NEW))
+ continue;
+ dev_dbg(netcp->ndev_dev, "adding address %pM, type %x\n",
+ naddr->addr, naddr->type);
+ mutex_lock(&netcp_modules_lock);
+ for_each_module(netcp, priv) {
+ module = priv->netcp_module;
+ if (!module->add_addr)
+ continue;
+ error = module->add_addr(priv->module_priv, naddr);
+ WARN_ON(error);
+ }
+ mutex_unlock(&netcp_modules_lock);
+ }
+}
+
+static void netcp_set_rx_mode(struct net_device *ndev)
+{
+ struct netcp_intf *netcp = netdev_priv(ndev);
+ struct netdev_hw_addr *ndev_addr;
+ bool promisc;
+
+ promisc = (ndev->flags & IFF_PROMISC ||
+ ndev->flags & IFF_ALLMULTI ||
+ netdev_mc_count(ndev) > NETCP_MAX_MCAST_ADDR);
+
+ /* first clear all marks */
+ netcp_addr_clear_mark(netcp);
+
+ /* next add new entries, mark existing ones */
+ netcp_addr_add_mark(netcp, ndev->broadcast, ADDR_BCAST);
+ for_each_dev_addr(ndev, ndev_addr)
+ netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_DEV);
+ netdev_for_each_uc_addr(ndev_addr, ndev)
+ netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_UCAST);
+ netdev_for_each_mc_addr(ndev_addr, ndev)
+ netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_MCAST);
+
+ if (promisc)
+ netcp_addr_add_mark(netcp, NULL, ADDR_ANY);
+
+ /* finally sweep and callout into modules */
+ netcp_addr_sweep_del(netcp);
+ netcp_addr_sweep_add(netcp);
+}
+
+static void netcp_free_navigator_resources(struct netcp_intf *netcp)
+{
+ int i;
+
+ if (netcp->rx_channel) {
+ knav_dma_close_channel(netcp->rx_channel);
+ netcp->rx_channel = NULL;
+ }
+
+ if (!IS_ERR_OR_NULL(netcp->rx_pool))
+ netcp_rxpool_free(netcp);
+
+ if (!IS_ERR_OR_NULL(netcp->rx_queue)) {
+ knav_queue_close(netcp->rx_queue);
+ netcp->rx_queue = NULL;
+ }
+
+ for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN &&
+ !IS_ERR_OR_NULL(netcp->rx_fdq[i]) ; ++i) {
+ knav_queue_close(netcp->rx_fdq[i]);
+ netcp->rx_fdq[i] = NULL;
+ }
+
+ if (!IS_ERR_OR_NULL(netcp->tx_compl_q)) {
+ knav_queue_close(netcp->tx_compl_q);
+ netcp->tx_compl_q = NULL;
+ }
+
+ if (!IS_ERR_OR_NULL(netcp->tx_pool)) {
+ knav_pool_destroy(netcp->tx_pool);
+ netcp->tx_pool = NULL;
+ }
+}
+
+static int netcp_setup_navigator_resources(struct net_device *ndev)
+{
+ struct netcp_intf *netcp = netdev_priv(ndev);
+ struct knav_queue_notify_config notify_cfg;
+ struct knav_dma_cfg config;
+ u32 last_fdq = 0;
+ u8 name[16];
+ int ret;
+ int i;
+
+ /* Create Rx/Tx descriptor pools */
+ snprintf(name, sizeof(name), "rx-pool-%s", ndev->name);
+ netcp->rx_pool = knav_pool_create(name, netcp->rx_pool_size,
+ netcp->rx_pool_region_id);
+ if (IS_ERR_OR_NULL(netcp->rx_pool)) {
+ dev_err(netcp->ndev_dev, "Couldn't create rx pool\n");
+ ret = PTR_ERR(netcp->rx_pool);
+ goto fail;
+ }
+
+ snprintf(name, sizeof(name), "tx-pool-%s", ndev->name);
+ netcp->tx_pool = knav_pool_create(name, netcp->tx_pool_size,
+ netcp->tx_pool_region_id);
+ if (IS_ERR_OR_NULL(netcp->tx_pool)) {
+ dev_err(netcp->ndev_dev, "Couldn't create tx pool\n");
+ ret = PTR_ERR(netcp->tx_pool);
+ goto fail;
+ }
+
+ /* open Tx completion queue */
+ snprintf(name, sizeof(name), "tx-compl-%s", ndev->name);
+ netcp->tx_compl_q = knav_queue_open(name, netcp->tx_compl_qid, 0);
+ if (IS_ERR_OR_NULL(netcp->tx_compl_q)) {
+ ret = PTR_ERR(netcp->tx_compl_q);
+ goto fail;
+ }
+ netcp->tx_compl_qid = knav_queue_get_id(netcp->tx_compl_q);
+
+ /* Set notification for Tx completion */
+ notify_cfg.fn = netcp_tx_notify;
+ notify_cfg.fn_arg = netcp;
+ ret = knav_queue_device_control(netcp->tx_compl_q,
+ KNAV_QUEUE_SET_NOTIFIER,
+ (unsigned long)¬ify_cfg);
+ if (ret)
+ goto fail;
+
+ knav_queue_disable_notify(netcp->tx_compl_q);
+
+ /* open Rx completion queue */
+ snprintf(name, sizeof(name), "rx-compl-%s", ndev->name);
+ netcp->rx_queue = knav_queue_open(name, netcp->rx_queue_id, 0);
+ if (IS_ERR_OR_NULL(netcp->rx_queue)) {
+ ret = PTR_ERR(netcp->rx_queue);
+ goto fail;
+ }
+ netcp->rx_queue_id = knav_queue_get_id(netcp->rx_queue);
+
+ /* Set notification for Rx completion */
+ notify_cfg.fn = netcp_rx_notify;
+ notify_cfg.fn_arg = netcp;
+ ret = knav_queue_device_control(netcp->rx_queue,
+ KNAV_QUEUE_SET_NOTIFIER,
+ (unsigned long)¬ify_cfg);
+ if (ret)
+ goto fail;
+
+ knav_queue_disable_notify(netcp->rx_queue);
+
+ /* open Rx FDQs */
+ for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN &&
+ netcp->rx_queue_depths[i] && netcp->rx_buffer_sizes[i]; ++i) {
+ snprintf(name, sizeof(name), "rx-fdq-%s-%d", ndev->name, i);
+ netcp->rx_fdq[i] = knav_queue_open(name, KNAV_QUEUE_GP, 0);
+ if (IS_ERR_OR_NULL(netcp->rx_fdq[i])) {
+ ret = PTR_ERR(netcp->rx_fdq[i]);
+ goto fail;
+ }
+ }
+
+ memset(&config, 0, sizeof(config));
+ config.direction = DMA_DEV_TO_MEM;
+ config.u.rx.einfo_present = true;
+ config.u.rx.psinfo_present = true;
+ config.u.rx.err_mode = DMA_DROP;
+ config.u.rx.desc_type = DMA_DESC_HOST;
+ config.u.rx.psinfo_at_sop = false;
+ config.u.rx.sop_offset = NETCP_SOP_OFFSET;
+ config.u.rx.dst_q = netcp->rx_queue_id;
+ config.u.rx.thresh = DMA_THRESH_NONE;
+
+ for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN; ++i) {
+ if (netcp->rx_fdq[i])
+ last_fdq = knav_queue_get_id(netcp->rx_fdq[i]);
+ config.u.rx.fdq[i] = last_fdq;
+ }
+
+ netcp->rx_channel = knav_dma_open_channel(netcp->netcp_device->device,
+ netcp->dma_chan_name, &config);
+ if (IS_ERR_OR_NULL(netcp->rx_channel)) {
+ dev_err(netcp->ndev_dev, "failed opening rx chan(%s\n",
+ netcp->dma_chan_name);
+ goto fail;
+ }
+
+ dev_dbg(netcp->ndev_dev, "opened RX channel: %p\n", netcp->rx_channel);
+ return 0;
+
+fail:
+ netcp_free_navigator_resources(netcp);
+ return ret;
+}
+
+/* Open the device */
+static int netcp_ndo_open(struct net_device *ndev)
+{
+ struct netcp_intf *netcp = netdev_priv(ndev);
+ struct netcp_intf_modpriv *intf_modpriv;
+ struct netcp_module *module;
+ int ret;
+
+ netif_carrier_off(ndev);
+ ret = netcp_setup_navigator_resources(ndev);
+ if (ret) {
+ dev_err(netcp->ndev_dev, "Failed to setup navigator resources\n");
+ goto fail;
+ }
+
+ mutex_lock(&netcp_modules_lock);
+ for_each_module(netcp, intf_modpriv) {
+ module = intf_modpriv->netcp_module;
+ if (module->open) {
+ ret = module->open(intf_modpriv->module_priv, ndev);
+ if (ret != 0) {
+ dev_err(netcp->ndev_dev, "module open failed\n");
+ goto fail_open;
+ }
+ }
+ }
+ mutex_unlock(&netcp_modules_lock);
+
+ netcp_rxpool_refill(netcp);
+ napi_enable(&netcp->rx_napi);
+ napi_enable(&netcp->tx_napi);
+ knav_queue_enable_notify(netcp->tx_compl_q);
+ knav_queue_enable_notify(netcp->rx_queue);
+ netif_tx_wake_all_queues(ndev);
+ dev_dbg(netcp->ndev_dev, "netcp device %s opened\n", ndev->name);
+ return 0;
+
+fail_open:
+ for_each_module(netcp, intf_modpriv) {
+ module = intf_modpriv->netcp_module;
+ if (module->close)
+ module->close(intf_modpriv->module_priv, ndev);
+ }
+ mutex_unlock(&netcp_modules_lock);
+
+fail:
+ netcp_free_navigator_resources(netcp);
+ return ret;
+}
+
+/* Close the device */
+static int netcp_ndo_stop(struct net_device *ndev)
+{
+ struct netcp_intf *netcp = netdev_priv(ndev);
+ struct netcp_intf_modpriv *intf_modpriv;
+ struct netcp_module *module;
+ int err = 0;
+
+ netif_tx_stop_all_queues(ndev);
+ netif_carrier_off(ndev);
+ netcp_addr_clear_mark(netcp);
+ netcp_addr_sweep_del(netcp);
+ knav_queue_disable_notify(netcp->rx_queue);
+ knav_queue_disable_notify(netcp->tx_compl_q);
+ napi_disable(&netcp->rx_napi);
+ napi_disable(&netcp->tx_napi);
+
+ mutex_lock(&netcp_modules_lock);
+ for_each_module(netcp, intf_modpriv) {
+ module = intf_modpriv->netcp_module;
+ if (module->close) {
+ err = module->close(intf_modpriv->module_priv, ndev);
+ if (err != 0)
+ dev_err(netcp->ndev_dev, "Close failed\n");
+ }
+ }
+ mutex_unlock(&netcp_modules_lock);
+
+ /* Recycle Rx descriptors from completion queue */
+ netcp_empty_rx_queue(netcp);
+
+ /* Recycle Tx descriptors from completion queue */
+ netcp_process_tx_compl_packets(netcp, netcp->tx_pool_size);
+
+ if (knav_pool_count(netcp->tx_pool) != netcp->tx_pool_size)
+ dev_err(netcp->ndev_dev, "Lost (%d) Tx descs\n",
+ netcp->tx_pool_size - knav_pool_count(netcp->tx_pool));
+
+ netcp_free_navigator_resources(netcp);
+ dev_dbg(netcp->ndev_dev, "netcp device %s stopped\n", ndev->name);
+ return 0;
+}
+
+static int netcp_ndo_ioctl(struct net_device *ndev,
+ struct ifreq *req, int cmd)
+{
+ struct netcp_intf *netcp = netdev_priv(ndev);
+ struct netcp_intf_modpriv *intf_modpriv;
+ struct netcp_module *module;
+ int ret = -1, err = -EOPNOTSUPP;
+
+ if (!netif_running(ndev))
+ return -EINVAL;
+
+ mutex_lock(&netcp_modules_lock);
+ for_each_module(netcp, intf_modpriv) {
+ module = intf_modpriv->netcp_module;
+ if (!module->ioctl)
+ continue;
+
+ err = module->ioctl(intf_modpriv->module_priv, req, cmd);
+ if ((err < 0) && (err != -EOPNOTSUPP)) {
+ ret = err;
+ goto out;
+ }
+ if (err == 0)
+ ret = err;
+ }
+
+out:
+ mutex_unlock(&netcp_modules_lock);
+ return (ret == 0) ? 0 : err;
+}
+
+static int netcp_ndo_change_mtu(struct net_device *ndev, int new_mtu)
+{
+ struct netcp_intf *netcp = netdev_priv(ndev);
+
+ /* MTU < 68 is an error for IPv4 traffic */
+ if ((new_mtu < 68) ||
+ (new_mtu > (NETCP_MAX_FRAME_SIZE - ETH_HLEN - ETH_FCS_LEN))) {
+ dev_err(netcp->ndev_dev, "Invalid mtu size = %d\n", new_mtu);
+ return -EINVAL;
+ }
+
+ ndev->mtu = new_mtu;
+ return 0;
+}
+
+static void netcp_ndo_tx_timeout(struct net_device *ndev)
+{
+ struct netcp_intf *netcp = netdev_priv(ndev);
+ unsigned int descs = knav_pool_count(netcp->tx_pool);
+
+ dev_err(netcp->ndev_dev, "transmit timed out tx descs(%d)\n", descs);
+ netcp_process_tx_compl_packets(netcp, netcp->tx_pool_size);
+ ndev->trans_start = jiffies;
+ netif_tx_wake_all_queues(ndev);
+}
+
+static int netcp_rx_add_vid(struct net_device *ndev, __be16 proto, u16 vid)
+{
+ struct netcp_intf *netcp = netdev_priv(ndev);
+ struct netcp_intf_modpriv *intf_modpriv;
+ struct netcp_module *module;
+ int err = 0;
+
+ dev_dbg(netcp->ndev_dev, "adding rx vlan id: %d\n", vid);
+
+ mutex_lock(&netcp_modules_lock);
+ for_each_module(netcp, intf_modpriv) {
+ module = intf_modpriv->netcp_module;
+ if ((module->add_vid) && (vid != 0)) {
+ err = module->add_vid(intf_modpriv->module_priv, vid);
+ if (err != 0) {
+ dev_err(netcp->ndev_dev, "Could not add vlan id = %d\n",
+ vid);
+ break;
+ }
+ }
+ }
+ mutex_unlock(&netcp_modules_lock);
+ return err;
+}
+
+static int netcp_rx_kill_vid(struct net_device *ndev, __be16 proto, u16 vid)
+{
+ struct netcp_intf *netcp = netdev_priv(ndev);
+ struct netcp_intf_modpriv *intf_modpriv;
+ struct netcp_module *module;
+ int err = 0;
+
+ dev_dbg(netcp->ndev_dev, "removing rx vlan id: %d\n", vid);
+
+ mutex_lock(&netcp_modules_lock);
+ for_each_module(netcp, intf_modpriv) {
+ module = intf_modpriv->netcp_module;
+ if (module->del_vid) {
+ err = module->del_vid(intf_modpriv->module_priv, vid);
+ if (err != 0) {
+ dev_err(netcp->ndev_dev, "Could not delete vlan id = %d\n",
+ vid);
+ break;
+ }
+ }
+ }
+ mutex_unlock(&netcp_modules_lock);
+ return err;
+}
+
+static u16 netcp_select_queue(struct net_device *dev, struct sk_buff *skb,
+ void *accel_priv,
+ select_queue_fallback_t fallback)
+{
+ return 0;
+}
+
+static int netcp_setup_tc(struct net_device *dev, u8 num_tc)
+{
+ int i;
+
+ /* setup tc must be called under rtnl lock */
+ ASSERT_RTNL();
+
+ /* Sanity-check the number of traffic classes requested */
+ if ((dev->real_num_tx_queues <= 1) ||
+ (dev->real_num_tx_queues < num_tc))
+ return -EINVAL;
+
+ /* Configure traffic class to queue mappings */
+ if (num_tc) {
+ netdev_set_num_tc(dev, num_tc);
+ for (i = 0; i < num_tc; i++)
+ netdev_set_tc_queue(dev, i, 1, i);
+ } else {
+ netdev_reset_tc(dev);
+ }
+
+ return 0;
+}
+
+static const struct net_device_ops netcp_netdev_ops = {
+ .ndo_open = netcp_ndo_open,
+ .ndo_stop = netcp_ndo_stop,
+ .ndo_start_xmit = netcp_ndo_start_xmit,
+ .ndo_set_rx_mode = netcp_set_rx_mode,
+ .ndo_do_ioctl = netcp_ndo_ioctl,
+ .ndo_change_mtu = netcp_ndo_change_mtu,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_vlan_rx_add_vid = netcp_rx_add_vid,
+ .ndo_vlan_rx_kill_vid = netcp_rx_kill_vid,
+ .ndo_tx_timeout = netcp_ndo_tx_timeout,
+ .ndo_select_queue = netcp_select_queue,
+ .ndo_setup_tc = netcp_setup_tc,
+};
+
+static int netcp_create_interface(struct netcp_device *netcp_device,
+ struct device_node *node_interface)
+{
+ struct device *dev = netcp_device->device;
+ struct device_node *node = dev->of_node;
+ struct netcp_intf *netcp;
+ struct net_device *ndev;
+ resource_size_t size;
+ struct resource res;
+ void __iomem *efuse = NULL;
+ u32 efuse_mac = 0;
+ const void *mac_addr;
+ u8 efuse_mac_addr[6];
+ u32 temp[2];
+ int ret = 0;
+
+ ndev = alloc_etherdev_mqs(sizeof(*netcp), 1, 1);
+ if (!ndev) {
+ dev_err(dev, "Error allocating netdev\n");
+ return -ENOMEM;
+ }
+
+ ndev->features |= NETIF_F_SG;
+ ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
+ ndev->hw_features = ndev->features;
+ ndev->vlan_features |= NETIF_F_SG;
+
+ netcp = netdev_priv(ndev);
+ spin_lock_init(&netcp->lock);
+ INIT_LIST_HEAD(&netcp->module_head);
+ INIT_LIST_HEAD(&netcp->txhook_list_head);
+ INIT_LIST_HEAD(&netcp->rxhook_list_head);
+ INIT_LIST_HEAD(&netcp->addr_list);
+ netcp->netcp_device = netcp_device;
+ netcp->dev = netcp_device->device;
+ netcp->ndev = ndev;
+ netcp->ndev_dev = &ndev->dev;
+ netcp->msg_enable = netif_msg_init(netcp_debug_level, NETCP_DEBUG);
+ netcp->tx_pause_threshold = MAX_SKB_FRAGS;
+ netcp->tx_resume_threshold = netcp->tx_pause_threshold;
+ netcp->node_interface = node_interface;
+
+ ret = of_property_read_u32(node_interface, "efuse-mac", &efuse_mac);
+ if (efuse_mac) {
+ if (of_address_to_resource(node, NETCP_EFUSE_REG_INDEX, &res)) {
+ dev_err(dev, "could not find efuse-mac reg resource\n");
+ ret = -ENODEV;
+ goto quit;
+ }
+ size = resource_size(&res);
+
+ if (!devm_request_mem_region(dev, res.start, size,
+ dev_name(dev))) {
+ dev_err(dev, "could not reserve resource\n");
+ ret = -ENOMEM;
+ goto quit;
+ }
+
+ efuse = devm_ioremap_nocache(dev, res.start, size);
+ if (!efuse) {
+ dev_err(dev, "could not map resource\n");
+ devm_release_mem_region(dev, res.start, size);
+ ret = -ENOMEM;
+ goto quit;
+ }
+
+ emac_arch_get_mac_addr(efuse_mac_addr, efuse);
+ if (is_valid_ether_addr(efuse_mac_addr))
+ ether_addr_copy(ndev->dev_addr, efuse_mac_addr);
+ else
+ random_ether_addr(ndev->dev_addr);
+
+ devm_iounmap(dev, efuse);
+ devm_release_mem_region(dev, res.start, size);
+ } else {
+ mac_addr = of_get_mac_address(node_interface);
+ if (mac_addr)
+ ether_addr_copy(ndev->dev_addr, mac_addr);
+ else
+ random_ether_addr(ndev->dev_addr);
+ }
+
+ ret = of_property_read_string(node_interface, "rx-channel",
+ &netcp->dma_chan_name);
+ if (ret < 0) {
+ dev_err(dev, "missing \"rx-channel\" parameter\n");
+ ret = -ENODEV;
+ goto quit;
+ }
+
+ ret = of_property_read_u32(node_interface, "rx-queue",
+ &netcp->rx_queue_id);
+ if (ret < 0) {
+ dev_warn(dev, "missing \"rx-queue\" parameter\n");
+ netcp->rx_queue_id = KNAV_QUEUE_QPEND;
+ }
+
+ ret = of_property_read_u32_array(node_interface, "rx-queue-depth",
+ netcp->rx_queue_depths,
+ KNAV_DMA_FDQ_PER_CHAN);
+ if (ret < 0) {
+ dev_err(dev, "missing \"rx-queue-depth\" parameter\n");
+ netcp->rx_queue_depths[0] = 128;
+ }
+
+ ret = of_property_read_u32_array(node_interface, "rx-buffer-size",
+ netcp->rx_buffer_sizes,
+ KNAV_DMA_FDQ_PER_CHAN);
+ if (ret) {
+ dev_err(dev, "missing \"rx-buffer-size\" parameter\n");
+ netcp->rx_buffer_sizes[0] = 1536;
+ }
+
+ ret = of_property_read_u32_array(node_interface, "rx-pool", temp, 2);
+ if (ret < 0) {
+ dev_err(dev, "missing \"rx-pool\" parameter\n");
+ ret = -ENODEV;
+ goto quit;
+ }
+ netcp->rx_pool_size = temp[0];
+ netcp->rx_pool_region_id = temp[1];
+
+ ret = of_property_read_u32_array(node_interface, "tx-pool", temp, 2);
+ if (ret < 0) {
+ dev_err(dev, "missing \"tx-pool\" parameter\n");
+ ret = -ENODEV;
+ goto quit;
+ }
+ netcp->tx_pool_size = temp[0];
+ netcp->tx_pool_region_id = temp[1];
+
+ if (netcp->tx_pool_size < MAX_SKB_FRAGS) {
+ dev_err(dev, "tx-pool size too small, must be atleast(%ld)\n",
+ MAX_SKB_FRAGS);
+ ret = -ENODEV;
+ goto quit;
+ }
+
+ ret = of_property_read_u32(node_interface, "tx-completion-queue",
+ &netcp->tx_compl_qid);
+ if (ret < 0) {
+ dev_warn(dev, "missing \"tx-completion-queue\" parameter\n");
+ netcp->tx_compl_qid = KNAV_QUEUE_QPEND;
+ }
+
+ /* NAPI register */
+ netif_napi_add(ndev, &netcp->rx_napi, netcp_rx_poll, NETCP_NAPI_WEIGHT);
+ netif_napi_add(ndev, &netcp->tx_napi, netcp_tx_poll, NETCP_NAPI_WEIGHT);
+
+ /* Register the network device */
+ ndev->dev_id = 0;
+ ndev->watchdog_timeo = NETCP_TX_TIMEOUT;
+ ndev->netdev_ops = &netcp_netdev_ops;
+ SET_NETDEV_DEV(ndev, dev);
+
+ list_add_tail(&netcp->interface_list, &netcp_device->interface_head);
+ return 0;
+
+quit:
+ free_netdev(ndev);
+ return ret;
+}
+
+static void netcp_delete_interface(struct netcp_device *netcp_device,
+ struct net_device *ndev)
+{
+ struct netcp_intf_modpriv *intf_modpriv, *tmp;
+ struct netcp_intf *netcp = netdev_priv(ndev);
+ struct netcp_module *module;
+
+ dev_dbg(netcp_device->device, "Removing interface \"%s\"\n",
+ ndev->name);
+
+ /* Notify each of the modules that the interface is going away */
+ list_for_each_entry_safe(intf_modpriv, tmp, &netcp->module_head,
+ intf_list) {
+ module = intf_modpriv->netcp_module;
+ dev_dbg(netcp_device->device, "Releasing module \"%s\"\n",
+ module->name);
+ if (module->release)
+ module->release(intf_modpriv->module_priv);
+ list_del(&intf_modpriv->intf_list);
+ kfree(intf_modpriv);
+ }
+ WARN(!list_empty(&netcp->module_head), "%s interface module list is not empty!\n",
+ ndev->name);
+
+ list_del(&netcp->interface_list);
+
+ of_node_put(netcp->node_interface);
+ unregister_netdev(ndev);
+ netif_napi_del(&netcp->rx_napi);
+ free_netdev(ndev);
+}
+
+static int netcp_probe(struct platform_device *pdev)
+{
+ struct device_node *node = pdev->dev.of_node;
+ struct netcp_intf *netcp_intf, *netcp_tmp;
+ struct device_node *child, *interfaces;
+ struct netcp_device *netcp_device;
+ struct device *dev = &pdev->dev;
+ struct netcp_module *module;
+ int ret;
+
+ if (!node) {
+ dev_err(dev, "could not find device info\n");
+ return -ENODEV;
+ }
+
+ /* Allocate a new NETCP device instance */
+ netcp_device = devm_kzalloc(dev, sizeof(*netcp_device), GFP_KERNEL);
+ if (!netcp_device)
+ return -ENOMEM;
+
+ pm_runtime_enable(&pdev->dev);
+ ret = pm_runtime_get_sync(&pdev->dev);
+ if (ret < 0) {
+ dev_err(dev, "Failed to enable NETCP power-domain\n");
+ pm_runtime_disable(&pdev->dev);
+ return ret;
+ }
+
+ /* Initialize the NETCP device instance */
+ INIT_LIST_HEAD(&netcp_device->interface_head);
+ INIT_LIST_HEAD(&netcp_device->modpriv_head);
+ netcp_device->device = dev;
+ platform_set_drvdata(pdev, netcp_device);
+
+ /* create interfaces */
+ interfaces = of_get_child_by_name(node, "netcp-interfaces");
+ if (!interfaces) {
+ dev_err(dev, "could not find netcp-interfaces node\n");
+ ret = -ENODEV;
+ goto probe_quit;
+ }
+
+ for_each_available_child_of_node(interfaces, child) {
+ ret = netcp_create_interface(netcp_device, child);
+ if (ret) {
+ dev_err(dev, "could not create interface(%s)\n",
+ child->name);
+ goto probe_quit_interface;
+ }
+ }
+
+ /* Add the device instance to the list */
+ list_add_tail(&netcp_device->device_list, &netcp_devices);
+
+ /* Probe & attach any modules already registered */
+ mutex_lock(&netcp_modules_lock);
+ for_each_netcp_module(module) {
+ ret = netcp_module_probe(netcp_device, module);
+ if (ret < 0)
+ dev_err(dev, "module(%s) probe failed\n", module->name);
+ }
+ mutex_unlock(&netcp_modules_lock);
+ return 0;
+
+probe_quit_interface:
+ list_for_each_entry_safe(netcp_intf, netcp_tmp,
+ &netcp_device->interface_head,
+ interface_list) {
+ netcp_delete_interface(netcp_device, netcp_intf->ndev);
+ }
+
+probe_quit:
+ pm_runtime_put_sync(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+ platform_set_drvdata(pdev, NULL);
+ return ret;
+}
+
+static int netcp_remove(struct platform_device *pdev)
+{
+ struct netcp_device *netcp_device = platform_get_drvdata(pdev);
+ struct netcp_inst_modpriv *inst_modpriv, *tmp;
+ struct netcp_module *module;
+
+ list_for_each_entry_safe(inst_modpriv, tmp, &netcp_device->modpriv_head,
+ inst_list) {
+ module = inst_modpriv->netcp_module;
+ dev_dbg(&pdev->dev, "Removing module \"%s\"\n", module->name);
+ module->remove(netcp_device, inst_modpriv->module_priv);
+ list_del(&inst_modpriv->inst_list);
+ kfree(inst_modpriv);
+ }
+ WARN(!list_empty(&netcp_device->interface_head), "%s interface list not empty!\n",
+ pdev->name);
+
+ devm_kfree(&pdev->dev, netcp_device);
+ pm_runtime_put_sync(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+ platform_set_drvdata(pdev, NULL);
+ return 0;
+}
+
+static struct of_device_id of_match[] = {
+ { .compatible = "ti,netcp-1.0", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_match);
+
+static struct platform_driver netcp_driver = {
+ .driver = {
+ .name = "netcp-1.0",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match,
+ },
+ .probe = netcp_probe,
+ .remove = netcp_remove,
+};
+module_platform_driver(netcp_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("TI NETCP driver for Keystone SOCs");
+MODULE_AUTHOR("Sandeep Nair <sandeep_n@ti.com");
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff