| /* |
| * 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_PACKET_SIZE (ETH_FRAME_LEN + ETH_FCS_LEN) |
| #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 NETCP_EFUSE_ADDR_SWAP 2 |
| |
| #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, u32 swap) |
| { |
| unsigned int addr0, addr1; |
| |
| addr1 = readl(efuse_mac + 4); |
| addr0 = readl(efuse_mac); |
| |
| switch (swap) { |
| case NETCP_EFUSE_ADDR_SWAP: |
| addr0 = addr1; |
| addr1 = readl(efuse_mac); |
| break; |
| default: |
| break; |
| } |
| |
| 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; |
| |
| 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); |
| |
| if (!interface) { |
| devm_kfree(dev, intf_modpriv); |
| continue; |
| } |
| |
| 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; |
| } |
| } |
| |
| /* Now register the interface with netdev */ |
| list_for_each_entry(netcp_intf, |
| &netcp_device->interface_head, |
| interface_list) { |
| /* If interface not registered then register now */ |
| if (!netcp_intf->netdev_registered) { |
| ret = netcp_register_interface(netcp_intf); |
| if (ret) |
| return -ENODEV; |
| } |
| } |
| 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; |
| } |
| EXPORT_SYMBOL_GPL(netcp_register_module); |
| |
| 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); |
| } |
| EXPORT_SYMBOL_GPL(netcp_unregister_module); |
| |
| 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; |
| } |
| EXPORT_SYMBOL_GPL(netcp_module_get_intf_data); |
| |
| /* 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; |
| } |
| EXPORT_SYMBOL_GPL(netcp_register_txhook); |
| |
| 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; |
| } |
| EXPORT_SYMBOL_GPL(netcp_unregister_txhook); |
| |
| 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) |
| skb_free_frag(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->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 int 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 -ENOMEM; |
| } |
| |
| if (likely(fdq == 0)) { |
| unsigned int primary_buf_len; |
| /* Allocate a primary receive queue entry */ |
| buf_len = NETCP_PACKET_SIZE + NETCP_SOP_OFFSET; |
| primary_buf_len = SKB_DATA_ALIGN(buf_len) + |
| SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); |
| |
| bufptr = netdev_alloc_frag(primary_buf_len); |
| pad[1] = primary_buf_len; |
| |
| 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); |
| if (unlikely(dma_mapping_error(netcp->dev, dma))) |
| goto fail; |
| |
| pad[0] = (u32)bufptr; |
| |
| } else { |
| /* Allocate a secondary receive queue entry */ |
| page = alloc_page(GFP_ATOMIC | GFP_DMA | __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 0; |
| |
| fail: |
| knav_pool_desc_put(netcp->rx_pool, hwdesc); |
| return -ENOMEM; |
| } |
| |
| /* 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, ret = 0; |
| |
| /* 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]-- && !ret) |
| ret = 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); |
| |
| netcp_rxpool_refill(netcp); |
| if (packets < budget) { |
| napi_complete(&netcp->rx_napi); |
| knav_queue_enable_notify(netcp->rx_queue); |
| } |
| |
| 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_mapping_error(dev, dma_addr))) { |
| dev_err(netcp->ndev_dev, "Failed to map skb buffer\n"); |
| return NULL; |
| } |
| |
| desc = knav_pool_desc_get(netcp->tx_pool); |
| if (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 (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; |
| unsigned int dma_sz; |
| dma_addr_t dma; |
| u32 tmp = 0; |
| 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); |
| tmp |= (p_info.psdata_len & KNAV_DMA_DESC_PSLEN_MASK) << |
| KNAV_DMA_DESC_PSLEN_SHIFT; |
| } |
| |
| tmp |= KNAV_DMA_DESC_HAS_EPIB | |
| ((netcp->tx_compl_qid & KNAV_DMA_DESC_RETQ_MASK) << |
| KNAV_DMA_DESC_RETQ_SHIFT); |
| |
| if (!(tx_pipe->flags & SWITCH_TO_PORT_IN_TAGINFO)) { |
| tmp |= ((tx_pipe->switch_to_port & KNAV_DMA_DESC_PSFLAG_MASK) << |
| KNAV_DMA_DESC_PSFLAG_SHIFT); |
| } |
| |
| set_words(&tmp, 1, &desc->packet_info); |
| set_words((u32 *)&skb, 1, &desc->pad[0]); |
| |
| if (tx_pipe->flags & SWITCH_TO_PORT_IN_TAGINFO) { |
| tmp = tx_pipe->switch_to_port; |
| set_words((u32 *)&tmp, 1, &desc->tag_info); |
| } |
| |
| /* 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; |
| } |
| EXPORT_SYMBOL_GPL(netcp_txpipe_close); |
| |
| 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; |
| } |
| EXPORT_SYMBOL_GPL(netcp_txpipe_open); |
| |
| 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; |
| } |
| EXPORT_SYMBOL_GPL(netcp_txpipe_init); |
| |
| 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 |
| eth_zero_addr(naddr->addr); |
| 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); |
| 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); |
| } |
| 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); |
| |
| 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); |
| } |
| } |
| } |
| |
| 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); |
| |
| spin_lock(&netcp->lock); |
| /* 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); |
| spin_unlock(&netcp->lock); |
| } |
| |
| 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]; |
| ++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; |
| } |
| |
| 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; |
| } |
| } |
| } |
| |
| 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); |
| netcp_rxpool_refill(netcp); |
| 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); |
| } |
| |
| 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); |
| |
| 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"); |
| } |
| } |
| |
| /* 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; |
| |
| 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: |
| 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; |
| unsigned long flags; |
| int err = 0; |
| |
| dev_dbg(netcp->ndev_dev, "adding rx vlan id: %d\n", vid); |
| |
| spin_lock_irqsave(&netcp->lock, flags); |
| 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; |
| } |
| } |
| } |
| spin_unlock_irqrestore(&netcp->lock, flags); |
| |
| 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; |
| unsigned long flags; |
| int err = 0; |
| |
| dev_dbg(netcp->ndev_dev, "removing rx vlan id: %d\n", vid); |
| |
| spin_lock_irqsave(&netcp->lock, flags); |
| 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; |
| } |
| } |
| } |
| spin_unlock_irqrestore(&netcp->lock, flags); |
| 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, efuse_mac); |
| 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-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; |
| 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); |
| |
| 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_intf *netcp_intf, *netcp_tmp; |
| 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); |
| } |
| |
| /* now that all modules are removed, clean up the interfaces */ |
| list_for_each_entry_safe(netcp_intf, netcp_tmp, |
| &netcp_device->interface_head, |
| interface_list) { |
| netcp_delete_interface(netcp_device, netcp_intf->ndev); |
| } |
| |
| WARN(!list_empty(&netcp_device->interface_head), |
| "%s interface list not empty!\n", pdev->name); |
| |
| pm_runtime_put_sync(&pdev->dev); |
| pm_runtime_disable(&pdev->dev); |
| platform_set_drvdata(pdev, NULL); |
| return 0; |
| } |
| |
| static const 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", |
| .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"); |