2282 lines
60 KiB
C
2282 lines
60 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Keystone NetCP Core driver
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*
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* Copyright (C) 2014 Texas Instruments Incorporated
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* Authors: Sandeep Nair <sandeep_n@ti.com>
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* Sandeep Paulraj <s-paulraj@ti.com>
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* Cyril Chemparathy <cyril@ti.com>
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* Santosh Shilimkar <santosh.shilimkar@ti.com>
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* Murali Karicheri <m-karicheri2@ti.com>
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* Wingman Kwok <w-kwok2@ti.com>
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*/
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/of_net.h>
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#include <linux/of_address.h>
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#include <linux/if_vlan.h>
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#include <linux/pm_runtime.h>
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#include <linux/platform_device.h>
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#include <linux/soc/ti/knav_qmss.h>
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#include <linux/soc/ti/knav_dma.h>
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#include "netcp.h"
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#define NETCP_SOP_OFFSET (NET_IP_ALIGN + NET_SKB_PAD)
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#define NETCP_NAPI_WEIGHT 64
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#define NETCP_TX_TIMEOUT (5 * HZ)
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#define NETCP_PACKET_SIZE (ETH_FRAME_LEN + ETH_FCS_LEN)
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#define NETCP_MIN_PACKET_SIZE ETH_ZLEN
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#define NETCP_MAX_MCAST_ADDR 16
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#define NETCP_EFUSE_REG_INDEX 0
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#define NETCP_MOD_PROBE_SKIPPED 1
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#define NETCP_MOD_PROBE_FAILED 2
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#define NETCP_DEBUG (NETIF_MSG_HW | NETIF_MSG_WOL | \
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NETIF_MSG_DRV | NETIF_MSG_LINK | \
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NETIF_MSG_IFUP | NETIF_MSG_INTR | \
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NETIF_MSG_PROBE | NETIF_MSG_TIMER | \
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NETIF_MSG_IFDOWN | NETIF_MSG_RX_ERR | \
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NETIF_MSG_TX_ERR | NETIF_MSG_TX_DONE | \
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NETIF_MSG_PKTDATA | NETIF_MSG_TX_QUEUED | \
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NETIF_MSG_RX_STATUS)
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#define NETCP_EFUSE_ADDR_SWAP 2
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#define knav_queue_get_id(q) knav_queue_device_control(q, \
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KNAV_QUEUE_GET_ID, (unsigned long)NULL)
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#define knav_queue_enable_notify(q) knav_queue_device_control(q, \
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KNAV_QUEUE_ENABLE_NOTIFY, \
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(unsigned long)NULL)
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#define knav_queue_disable_notify(q) knav_queue_device_control(q, \
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KNAV_QUEUE_DISABLE_NOTIFY, \
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(unsigned long)NULL)
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#define knav_queue_get_count(q) knav_queue_device_control(q, \
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KNAV_QUEUE_GET_COUNT, (unsigned long)NULL)
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#define for_each_netcp_module(module) \
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list_for_each_entry(module, &netcp_modules, module_list)
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#define for_each_netcp_device_module(netcp_device, inst_modpriv) \
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list_for_each_entry(inst_modpriv, \
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&((netcp_device)->modpriv_head), inst_list)
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#define for_each_module(netcp, intf_modpriv) \
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list_for_each_entry(intf_modpriv, &netcp->module_head, intf_list)
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/* Module management structures */
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struct netcp_device {
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struct list_head device_list;
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struct list_head interface_head;
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struct list_head modpriv_head;
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struct device *device;
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};
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struct netcp_inst_modpriv {
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struct netcp_device *netcp_device;
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struct netcp_module *netcp_module;
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struct list_head inst_list;
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void *module_priv;
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};
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struct netcp_intf_modpriv {
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struct netcp_intf *netcp_priv;
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struct netcp_module *netcp_module;
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struct list_head intf_list;
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void *module_priv;
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};
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struct netcp_tx_cb {
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void *ts_context;
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void (*txtstamp)(void *context, struct sk_buff *skb);
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};
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static LIST_HEAD(netcp_devices);
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static LIST_HEAD(netcp_modules);
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static DEFINE_MUTEX(netcp_modules_lock);
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static int netcp_debug_level = -1;
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module_param(netcp_debug_level, int, 0);
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MODULE_PARM_DESC(netcp_debug_level, "Netcp debug level (NETIF_MSG bits) (0=none,...,16=all)");
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/* Helper functions - Get/Set */
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static void get_pkt_info(dma_addr_t *buff, u32 *buff_len, dma_addr_t *ndesc,
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struct knav_dma_desc *desc)
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{
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*buff_len = le32_to_cpu(desc->buff_len);
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*buff = le32_to_cpu(desc->buff);
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*ndesc = le32_to_cpu(desc->next_desc);
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}
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static void get_desc_info(u32 *desc_info, u32 *pkt_info,
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struct knav_dma_desc *desc)
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{
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*desc_info = le32_to_cpu(desc->desc_info);
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*pkt_info = le32_to_cpu(desc->packet_info);
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}
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static u32 get_sw_data(int index, struct knav_dma_desc *desc)
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{
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/* No Endian conversion needed as this data is untouched by hw */
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return desc->sw_data[index];
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}
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/* use these macros to get sw data */
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#define GET_SW_DATA0(desc) get_sw_data(0, desc)
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#define GET_SW_DATA1(desc) get_sw_data(1, desc)
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#define GET_SW_DATA2(desc) get_sw_data(2, desc)
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#define GET_SW_DATA3(desc) get_sw_data(3, desc)
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static void get_org_pkt_info(dma_addr_t *buff, u32 *buff_len,
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struct knav_dma_desc *desc)
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{
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*buff = le32_to_cpu(desc->orig_buff);
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*buff_len = le32_to_cpu(desc->orig_len);
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}
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static void get_words(dma_addr_t *words, int num_words, __le32 *desc)
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{
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int i;
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for (i = 0; i < num_words; i++)
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words[i] = le32_to_cpu(desc[i]);
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}
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static void set_pkt_info(dma_addr_t buff, u32 buff_len, u32 ndesc,
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struct knav_dma_desc *desc)
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{
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desc->buff_len = cpu_to_le32(buff_len);
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desc->buff = cpu_to_le32(buff);
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desc->next_desc = cpu_to_le32(ndesc);
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}
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static void set_desc_info(u32 desc_info, u32 pkt_info,
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struct knav_dma_desc *desc)
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{
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desc->desc_info = cpu_to_le32(desc_info);
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desc->packet_info = cpu_to_le32(pkt_info);
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}
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static void set_sw_data(int index, u32 data, struct knav_dma_desc *desc)
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{
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/* No Endian conversion needed as this data is untouched by hw */
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desc->sw_data[index] = data;
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}
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/* use these macros to set sw data */
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#define SET_SW_DATA0(data, desc) set_sw_data(0, data, desc)
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#define SET_SW_DATA1(data, desc) set_sw_data(1, data, desc)
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#define SET_SW_DATA2(data, desc) set_sw_data(2, data, desc)
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#define SET_SW_DATA3(data, desc) set_sw_data(3, data, desc)
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static void set_org_pkt_info(dma_addr_t buff, u32 buff_len,
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struct knav_dma_desc *desc)
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{
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desc->orig_buff = cpu_to_le32(buff);
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desc->orig_len = cpu_to_le32(buff_len);
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}
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static void set_words(u32 *words, int num_words, __le32 *desc)
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{
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int i;
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for (i = 0; i < num_words; i++)
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desc[i] = cpu_to_le32(words[i]);
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}
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/* Read the e-fuse value as 32 bit values to be endian independent */
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static int emac_arch_get_mac_addr(char *x, void __iomem *efuse_mac, u32 swap)
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{
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unsigned int addr0, addr1;
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addr1 = readl(efuse_mac + 4);
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addr0 = readl(efuse_mac);
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switch (swap) {
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case NETCP_EFUSE_ADDR_SWAP:
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addr0 = addr1;
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addr1 = readl(efuse_mac);
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break;
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default:
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break;
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}
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x[0] = (addr1 & 0x0000ff00) >> 8;
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x[1] = addr1 & 0x000000ff;
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x[2] = (addr0 & 0xff000000) >> 24;
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x[3] = (addr0 & 0x00ff0000) >> 16;
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x[4] = (addr0 & 0x0000ff00) >> 8;
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x[5] = addr0 & 0x000000ff;
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return 0;
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}
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/* Module management routines */
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static int netcp_register_interface(struct netcp_intf *netcp)
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{
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int ret;
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ret = register_netdev(netcp->ndev);
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if (!ret)
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netcp->netdev_registered = true;
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return ret;
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}
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static int netcp_module_probe(struct netcp_device *netcp_device,
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struct netcp_module *module)
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{
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struct device *dev = netcp_device->device;
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struct device_node *devices, *interface, *node = dev->of_node;
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struct device_node *child;
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struct netcp_inst_modpriv *inst_modpriv;
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struct netcp_intf *netcp_intf;
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struct netcp_module *tmp;
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bool primary_module_registered = false;
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int ret;
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/* Find this module in the sub-tree for this device */
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devices = of_get_child_by_name(node, "netcp-devices");
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if (!devices) {
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dev_err(dev, "could not find netcp-devices node\n");
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return NETCP_MOD_PROBE_SKIPPED;
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}
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for_each_available_child_of_node(devices, child) {
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const char *name;
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char node_name[32];
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if (of_property_read_string(child, "label", &name) < 0) {
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snprintf(node_name, sizeof(node_name), "%pOFn", child);
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name = node_name;
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}
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if (!strcasecmp(module->name, name))
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break;
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}
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of_node_put(devices);
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/* If module not used for this device, skip it */
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if (!child) {
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dev_warn(dev, "module(%s) not used for device\n", module->name);
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return NETCP_MOD_PROBE_SKIPPED;
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}
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inst_modpriv = devm_kzalloc(dev, sizeof(*inst_modpriv), GFP_KERNEL);
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if (!inst_modpriv) {
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of_node_put(child);
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return -ENOMEM;
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}
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inst_modpriv->netcp_device = netcp_device;
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inst_modpriv->netcp_module = module;
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list_add_tail(&inst_modpriv->inst_list, &netcp_device->modpriv_head);
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ret = module->probe(netcp_device, dev, child,
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&inst_modpriv->module_priv);
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of_node_put(child);
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if (ret) {
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dev_err(dev, "Probe of module(%s) failed with %d\n",
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module->name, ret);
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list_del(&inst_modpriv->inst_list);
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devm_kfree(dev, inst_modpriv);
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return NETCP_MOD_PROBE_FAILED;
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}
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/* Attach modules only if the primary module is probed */
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for_each_netcp_module(tmp) {
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if (tmp->primary)
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primary_module_registered = true;
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}
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if (!primary_module_registered)
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return 0;
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/* Attach module to interfaces */
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list_for_each_entry(netcp_intf, &netcp_device->interface_head,
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interface_list) {
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struct netcp_intf_modpriv *intf_modpriv;
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intf_modpriv = devm_kzalloc(dev, sizeof(*intf_modpriv),
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GFP_KERNEL);
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if (!intf_modpriv)
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return -ENOMEM;
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interface = of_parse_phandle(netcp_intf->node_interface,
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module->name, 0);
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if (!interface) {
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devm_kfree(dev, intf_modpriv);
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continue;
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}
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intf_modpriv->netcp_priv = netcp_intf;
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intf_modpriv->netcp_module = module;
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list_add_tail(&intf_modpriv->intf_list,
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&netcp_intf->module_head);
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ret = module->attach(inst_modpriv->module_priv,
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netcp_intf->ndev, interface,
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&intf_modpriv->module_priv);
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of_node_put(interface);
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if (ret) {
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dev_dbg(dev, "Attach of module %s declined with %d\n",
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module->name, ret);
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list_del(&intf_modpriv->intf_list);
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devm_kfree(dev, intf_modpriv);
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continue;
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}
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}
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/* Now register the interface with netdev */
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list_for_each_entry(netcp_intf,
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&netcp_device->interface_head,
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interface_list) {
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/* If interface not registered then register now */
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if (!netcp_intf->netdev_registered) {
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ret = netcp_register_interface(netcp_intf);
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if (ret)
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return -ENODEV;
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}
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}
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return 0;
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}
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int netcp_register_module(struct netcp_module *module)
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{
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struct netcp_device *netcp_device;
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struct netcp_module *tmp;
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int ret;
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if (!module->name) {
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WARN(1, "error registering netcp module: no name\n");
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return -EINVAL;
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}
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if (!module->probe) {
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WARN(1, "error registering netcp module: no probe\n");
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return -EINVAL;
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}
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mutex_lock(&netcp_modules_lock);
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for_each_netcp_module(tmp) {
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if (!strcasecmp(tmp->name, module->name)) {
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mutex_unlock(&netcp_modules_lock);
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return -EEXIST;
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}
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}
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list_add_tail(&module->module_list, &netcp_modules);
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list_for_each_entry(netcp_device, &netcp_devices, device_list) {
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ret = netcp_module_probe(netcp_device, module);
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if (ret < 0)
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goto fail;
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}
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mutex_unlock(&netcp_modules_lock);
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return 0;
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fail:
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mutex_unlock(&netcp_modules_lock);
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netcp_unregister_module(module);
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return ret;
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}
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EXPORT_SYMBOL_GPL(netcp_register_module);
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static void netcp_release_module(struct netcp_device *netcp_device,
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struct netcp_module *module)
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{
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struct netcp_inst_modpriv *inst_modpriv, *inst_tmp;
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struct netcp_intf *netcp_intf, *netcp_tmp;
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struct device *dev = netcp_device->device;
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/* Release the module from each interface */
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list_for_each_entry_safe(netcp_intf, netcp_tmp,
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&netcp_device->interface_head,
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interface_list) {
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struct netcp_intf_modpriv *intf_modpriv, *intf_tmp;
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list_for_each_entry_safe(intf_modpriv, intf_tmp,
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&netcp_intf->module_head,
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intf_list) {
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if (intf_modpriv->netcp_module == module) {
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module->release(intf_modpriv->module_priv);
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list_del(&intf_modpriv->intf_list);
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devm_kfree(dev, intf_modpriv);
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break;
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}
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}
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}
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/* Remove the module from each instance */
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list_for_each_entry_safe(inst_modpriv, inst_tmp,
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&netcp_device->modpriv_head, inst_list) {
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if (inst_modpriv->netcp_module == module) {
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module->remove(netcp_device,
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inst_modpriv->module_priv);
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list_del(&inst_modpriv->inst_list);
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devm_kfree(dev, inst_modpriv);
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break;
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}
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}
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}
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void netcp_unregister_module(struct netcp_module *module)
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{
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struct netcp_device *netcp_device;
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struct netcp_module *module_tmp;
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mutex_lock(&netcp_modules_lock);
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list_for_each_entry(netcp_device, &netcp_devices, device_list) {
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netcp_release_module(netcp_device, module);
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}
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/* Remove the module from the module list */
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for_each_netcp_module(module_tmp) {
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if (module == module_tmp) {
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list_del(&module->module_list);
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break;
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}
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}
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mutex_unlock(&netcp_modules_lock);
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}
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EXPORT_SYMBOL_GPL(netcp_unregister_module);
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void *netcp_module_get_intf_data(struct netcp_module *module,
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struct netcp_intf *intf)
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{
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struct netcp_intf_modpriv *intf_modpriv;
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list_for_each_entry(intf_modpriv, &intf->module_head, intf_list)
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if (intf_modpriv->netcp_module == module)
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return intf_modpriv->module_priv;
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return NULL;
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}
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EXPORT_SYMBOL_GPL(netcp_module_get_intf_data);
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/* Module TX and RX Hook management */
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struct netcp_hook_list {
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struct list_head list;
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netcp_hook_rtn *hook_rtn;
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void *hook_data;
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int order;
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};
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int netcp_register_txhook(struct netcp_intf *netcp_priv, int order,
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netcp_hook_rtn *hook_rtn, void *hook_data)
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{
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struct netcp_hook_list *entry;
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struct netcp_hook_list *next;
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unsigned long flags;
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entry = devm_kzalloc(netcp_priv->dev, sizeof(*entry), GFP_KERNEL);
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if (!entry)
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return -ENOMEM;
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entry->hook_rtn = hook_rtn;
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entry->hook_data = hook_data;
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entry->order = order;
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spin_lock_irqsave(&netcp_priv->lock, flags);
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list_for_each_entry(next, &netcp_priv->txhook_list_head, list) {
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if (next->order > order)
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break;
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}
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__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;
|
|
}
|
|
EXPORT_SYMBOL_GPL(netcp_register_rxhook);
|
|
|
|
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;
|
|
}
|
|
EXPORT_SYMBOL_GPL(netcp_unregister_rxhook);
|
|
|
|
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);
|
|
/* warning!!!! We are retrieving the virtual ptr in the sw_data
|
|
* field as a 32bit value. Will not work on 64bit machines
|
|
*/
|
|
buf_ptr = (void *)GET_SW_DATA0(ndesc);
|
|
buf_len = (int)GET_SW_DATA1(desc);
|
|
dma_unmap_page(netcp->dev, dma_buf, PAGE_SIZE, DMA_FROM_DEVICE);
|
|
__free_page(buf_ptr);
|
|
knav_pool_desc_put(netcp->rx_pool, desc);
|
|
}
|
|
/* warning!!!! We are retrieving the virtual ptr in the sw_data
|
|
* field as a 32bit value. Will not work on 64bit machines
|
|
*/
|
|
buf_ptr = (void *)GET_SW_DATA0(desc);
|
|
buf_len = (int)GET_SW_DATA1(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 netcp_stats *rx_stats = &netcp->stats;
|
|
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__);
|
|
rx_stats->rx_errors++;
|
|
continue;
|
|
}
|
|
netcp_free_rx_desc_chain(netcp, desc);
|
|
rx_stats->rx_dropped++;
|
|
}
|
|
}
|
|
|
|
static int netcp_process_one_rx_packet(struct netcp_intf *netcp)
|
|
{
|
|
struct netcp_stats *rx_stats = &netcp->stats;
|
|
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);
|
|
/* warning!!!! We are retrieving the virtual ptr in the sw_data
|
|
* field as a 32bit value. Will not work on 64bit machines
|
|
*/
|
|
org_buf_ptr = (void *)GET_SW_DATA0(desc);
|
|
org_buf_len = (int)GET_SW_DATA1(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);
|
|
/* warning!!!! We are retrieving the virtual ptr in the sw_data
|
|
* field as a 32bit value. Will not work on 64bit machines
|
|
*/
|
|
page = (struct page *)GET_SW_DATA0(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(%pad), len(%d), page(%p)\n",
|
|
&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);
|
|
}
|
|
|
|
/* 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);
|
|
|
|
/* Newer version of the Ethernet switch can trim the Ethernet FCS
|
|
* from the packet and is indicated in hw_cap. So trim it only for
|
|
* older h/w
|
|
*/
|
|
if (!(netcp->hw_cap & ETH_SW_CAN_REMOVE_ETH_FCS))
|
|
__pskb_trim(skb, skb->len - ETH_FCS_LEN);
|
|
|
|
/* Call each of the RX hooks */
|
|
p_info.skb = skb;
|
|
skb->dev = netcp->ndev;
|
|
p_info.rxtstamp_complete = false;
|
|
get_desc_info(&tmp, &p_info.eflags, desc);
|
|
p_info.epib = desc->epib;
|
|
p_info.psdata = (u32 __force *)desc->psdata;
|
|
p_info.eflags = ((p_info.eflags >> KNAV_DMA_DESC_EFLAGS_SHIFT) &
|
|
KNAV_DMA_DESC_EFLAGS_MASK);
|
|
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);
|
|
/* Free the primary descriptor */
|
|
rx_stats->rx_dropped++;
|
|
knav_pool_desc_put(netcp->rx_pool, desc);
|
|
dev_kfree_skb(skb);
|
|
return 0;
|
|
}
|
|
}
|
|
/* Free the primary descriptor */
|
|
knav_pool_desc_put(netcp->rx_pool, desc);
|
|
|
|
u64_stats_update_begin(&rx_stats->syncp_rx);
|
|
rx_stats->rx_packets++;
|
|
rx_stats->rx_bytes += skb->len;
|
|
u64_stats_update_end(&rx_stats->syncp_rx);
|
|
|
|
/* 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);
|
|
rx_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;
|
|
|
|
/* 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);
|
|
/* warning!!!! We are retrieving the virtual ptr in the sw_data
|
|
* field as a 32bit value. Will not work on 64bit machines
|
|
*/
|
|
buf_ptr = (void *)GET_SW_DATA0(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 sw_data[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);
|
|
sw_data[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;
|
|
|
|
/* warning!!!! We are saving the virtual ptr in the sw_data
|
|
* field as a 32bit value. Will not work on 64bit machines
|
|
*/
|
|
sw_data[0] = (u32)bufptr;
|
|
} else {
|
|
/* Allocate a secondary receive queue entry */
|
|
page = alloc_page(GFP_ATOMIC | GFP_DMA);
|
|
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);
|
|
/* warning!!!! We are saving the virtual ptr in the sw_data
|
|
* field as a 32bit value. Will not work on 64bit machines
|
|
*/
|
|
sw_data[0] = (u32)page;
|
|
sw_data[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_SW_DATA0(sw_data[0], hwdesc);
|
|
SET_SW_DATA1(sw_data[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_done(&netcp->rx_napi, packets);
|
|
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(%pad), len(%d)\n",
|
|
&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 netcp_stats *tx_stats = &netcp->stats;
|
|
struct knav_dma_desc *desc;
|
|
struct netcp_tx_cb *tx_cb;
|
|
struct sk_buff *skb;
|
|
unsigned int dma_sz;
|
|
dma_addr_t dma;
|
|
int pkts = 0;
|
|
|
|
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");
|
|
tx_stats->tx_errors++;
|
|
continue;
|
|
}
|
|
|
|
/* warning!!!! We are retrieving the virtual ptr in the sw_data
|
|
* field as a 32bit value. Will not work on 64bit machines
|
|
*/
|
|
skb = (struct sk_buff *)GET_SW_DATA0(desc);
|
|
netcp_free_tx_desc_chain(netcp, desc, dma_sz);
|
|
if (!skb) {
|
|
dev_err(netcp->ndev_dev, "No skb in Tx desc\n");
|
|
tx_stats->tx_errors++;
|
|
continue;
|
|
}
|
|
|
|
tx_cb = (struct netcp_tx_cb *)skb->cb;
|
|
if (tx_cb->txtstamp)
|
|
tx_cb->txtstamp(tx_cb->ts_context, skb);
|
|
|
|
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);
|
|
}
|
|
|
|
u64_stats_update_begin(&tx_stats->syncp_tx);
|
|
tx_stats->tx_packets++;
|
|
tx_stats->tx_bytes += skb->len;
|
|
u64_stats_update_end(&tx_stats->syncp_tx);
|
|
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 = skb_frag_off(frag);
|
|
u32 buf_len = skb_frag_size(frag);
|
|
dma_addr_t desc_dma;
|
|
u32 desc_dma_32;
|
|
|
|
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, ndesc);
|
|
set_pkt_info(dma_addr, buf_len, 0, ndesc);
|
|
desc_dma_32 = (u32)desc_dma;
|
|
set_words(&desc_dma_32, 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;
|
|
struct netcp_tx_cb *tx_cb;
|
|
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 = NULL;
|
|
p_info.epib = desc->epib;
|
|
p_info.psdata = (u32 __force *)desc->psdata;
|
|
memset(p_info.epib, 0, KNAV_DMA_NUM_EPIB_WORDS * sizeof(__le32));
|
|
|
|
/* 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;
|
|
}
|
|
|
|
tx_cb = (struct netcp_tx_cb *)skb->cb;
|
|
tx_cb->ts_context = p_info.ts_context;
|
|
tx_cb->txtstamp = p_info.txtstamp;
|
|
|
|
/* update descriptor */
|
|
if (p_info.psdata_len) {
|
|
/* psdata points to both native-endian and device-endian data */
|
|
__le32 *psdata = (void __force *)p_info.psdata;
|
|
|
|
set_words((u32 *)psdata +
|
|
(KNAV_DMA_NUM_PS_WORDS - p_info.psdata_len),
|
|
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);
|
|
/* warning!!!! We are saving the virtual ptr in the sw_data
|
|
* field as a 32bit value. Will not work on 64bit machines
|
|
*/
|
|
SET_SW_DATA0((u32)skb, desc);
|
|
|
|
if (tx_pipe->flags & SWITCH_TO_PORT_IN_TAGINFO) {
|
|
tmp = tx_pipe->switch_to_port;
|
|
set_words(&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);
|
|
struct netcp_stats *tx_stats = &netcp->stats;
|
|
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);
|
|
tx_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;
|
|
|
|
/* 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:
|
|
tx_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(tx_pipe->dma_channel)) {
|
|
dev_err(dev, "failed opening tx chan(%s)\n",
|
|
tx_pipe->dma_chan_name);
|
|
ret = PTR_ERR(tx_pipe->dma_channel);
|
|
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\": %pe\n",
|
|
name, tx_pipe->dma_queue);
|
|
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 int netcp_set_promiscuous(struct netcp_intf *netcp, bool promisc)
|
|
{
|
|
struct netcp_intf_modpriv *priv;
|
|
struct netcp_module *module;
|
|
int error;
|
|
|
|
for_each_module(netcp, priv) {
|
|
module = priv->netcp_module;
|
|
if (!module->set_rx_mode)
|
|
continue;
|
|
|
|
error = module->set_rx_mode(priv->module_priv, promisc);
|
|
if (error)
|
|
return error;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
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);
|
|
netcp_set_promiscuous(netcp, promisc);
|
|
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(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(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(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(netcp->rx_channel)) {
|
|
dev_err(netcp->ndev_dev, "failed opening rx chan(%s\n",
|
|
netcp->dma_chan_name);
|
|
ret = PTR_ERR(netcp->rx_channel);
|
|
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 void netcp_ndo_tx_timeout(struct net_device *ndev, unsigned int txqueue)
|
|
{
|
|
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);
|
|
netif_trans_update(ndev);
|
|
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 int netcp_setup_tc(struct net_device *dev, enum tc_setup_type type,
|
|
void *type_data)
|
|
{
|
|
struct tc_mqprio_qopt *mqprio = type_data;
|
|
u8 num_tc;
|
|
int i;
|
|
|
|
/* setup tc must be called under rtnl lock */
|
|
ASSERT_RTNL();
|
|
|
|
if (type != TC_SETUP_QDISC_MQPRIO)
|
|
return -EOPNOTSUPP;
|
|
|
|
mqprio->hw = TC_MQPRIO_HW_OFFLOAD_TCS;
|
|
num_tc = mqprio->num_tc;
|
|
|
|
/* 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 void
|
|
netcp_get_stats(struct net_device *ndev, struct rtnl_link_stats64 *stats)
|
|
{
|
|
struct netcp_intf *netcp = netdev_priv(ndev);
|
|
struct netcp_stats *p = &netcp->stats;
|
|
u64 rxpackets, rxbytes, txpackets, txbytes;
|
|
unsigned int start;
|
|
|
|
do {
|
|
start = u64_stats_fetch_begin_irq(&p->syncp_rx);
|
|
rxpackets = p->rx_packets;
|
|
rxbytes = p->rx_bytes;
|
|
} while (u64_stats_fetch_retry_irq(&p->syncp_rx, start));
|
|
|
|
do {
|
|
start = u64_stats_fetch_begin_irq(&p->syncp_tx);
|
|
txpackets = p->tx_packets;
|
|
txbytes = p->tx_bytes;
|
|
} while (u64_stats_fetch_retry_irq(&p->syncp_tx, start));
|
|
|
|
stats->rx_packets = rxpackets;
|
|
stats->rx_bytes = rxbytes;
|
|
stats->tx_packets = txpackets;
|
|
stats->tx_bytes = txbytes;
|
|
|
|
/* The following are stored as 32 bit */
|
|
stats->rx_errors = p->rx_errors;
|
|
stats->rx_dropped = p->rx_dropped;
|
|
stats->tx_dropped = p->tx_dropped;
|
|
}
|
|
|
|
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_eth_ioctl = netcp_ndo_ioctl,
|
|
.ndo_get_stats64 = netcp_get_stats,
|
|
.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 = dev_pick_tx_zero,
|
|
.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;
|
|
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;
|
|
|
|
/* MTU range: 68 - 9486 */
|
|
ndev->min_mtu = ETH_MIN_MTU;
|
|
ndev->max_mtu = NETCP_MAX_FRAME_SIZE - (ETH_HLEN + ETH_FCS_LEN);
|
|
|
|
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);
|
|
u64_stats_init(&netcp->stats.syncp_rx);
|
|
u64_stats_init(&netcp->stats.syncp_tx);
|
|
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(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
|
|
eth_random_addr(ndev->dev_addr);
|
|
|
|
devm_iounmap(dev, efuse);
|
|
devm_release_mem_region(dev, res.start, size);
|
|
} else {
|
|
ret = of_get_mac_address(node_interface, ndev->dev_addr);
|
|
if (ret)
|
|
eth_random_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_tx_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);
|
|
}
|
|
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);
|
|
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 (!knav_dma_device_ready() ||
|
|
!knav_qmss_device_ready())
|
|
return -EPROBE_DEFER;
|
|
|
|
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(%pOFn)\n",
|
|
child);
|
|
goto probe_quit_interface;
|
|
}
|
|
}
|
|
|
|
of_node_put(interfaces);
|
|
|
|
/* 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);
|
|
}
|
|
|
|
of_node_put(interfaces);
|
|
|
|
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);
|
|
}
|
|
|
|
/* 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");
|