| /* Copyright (c) 2013-2017, The Linux Foundation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 and |
| * only version 2 as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| #include <linux/atomic.h> |
| #include <linux/errno.h> |
| #include <linux/etherdevice.h> |
| #include <linux/debugfs.h> |
| #include <linux/in.h> |
| #include <linux/stddef.h> |
| #include <linux/ip.h> |
| #include <linux/fs.h> |
| #include <linux/module.h> |
| #include <linux/msm_ipa.h> |
| #include <linux/netdevice.h> |
| #include <linux/skbuff.h> |
| #include <linux/sched.h> |
| #include <linux/ipa.h> |
| #include <linux/random.h> |
| #include <linux/rndis_ipa.h> |
| #include <linux/workqueue.h> |
| #include "../ipa_common_i.h" |
| #include "../ipa_v3/ipa_pm.h" |
| |
| #define CREATE_TRACE_POINTS |
| #include "rndis_ipa_trace.h" |
| |
| #define DRV_NAME "RNDIS_IPA" |
| #define DEBUGFS_DIR_NAME "rndis_ipa" |
| #define DEBUGFS_AGGR_DIR_NAME "rndis_ipa_aggregation" |
| #define NETDEV_NAME "rndis" |
| #define DRV_RESOURCE_ID IPA_RM_RESOURCE_RNDIS_PROD |
| #define IPV4_HDR_NAME "rndis_eth_ipv4" |
| #define IPV6_HDR_NAME "rndis_eth_ipv6" |
| #define IPA_TO_USB_CLIENT IPA_CLIENT_USB_CONS |
| #define INACTIVITY_MSEC_DELAY 100 |
| #define DEFAULT_OUTSTANDING_HIGH 64 |
| #define DEFAULT_OUTSTANDING_LOW 32 |
| #define DEBUGFS_TEMP_BUF_SIZE 4 |
| #define RNDIS_IPA_PKT_TYPE 0x00000001 |
| #define RNDIS_IPA_DFLT_RT_HDL 0 |
| #define FROM_IPA_TO_USB_BAMDMA 4 |
| #define FROM_USB_TO_IPA_BAMDMA 5 |
| #define BAM_DMA_MAX_PKT_NUMBER 10 |
| #define BAM_DMA_DATA_FIFO_SIZE \ |
| (BAM_DMA_MAX_PKT_NUMBER * \ |
| (ETH_FRAME_LEN + sizeof(struct rndis_pkt_hdr))) |
| #define BAM_DMA_DESC_FIFO_SIZE \ |
| (BAM_DMA_MAX_PKT_NUMBER * (sizeof(struct sps_iovec))) |
| #define TX_TIMEOUT (5 * HZ) |
| #define MIN_TX_ERROR_SLEEP_PERIOD 500 |
| #define DEFAULT_AGGR_TIME_LIMIT 1 |
| #define DEFAULT_AGGR_PKT_LIMIT 0 |
| |
| #define RNDIS_IPA_ERROR(fmt, args...) \ |
| pr_err(DRV_NAME "@%s@%d@ctx:%s: "\ |
| fmt, __func__, __LINE__, current->comm, ## args) |
| #define RNDIS_IPA_DEBUG(fmt, args...) \ |
| pr_debug("ctx: %s, "fmt, current->comm, ## args) |
| |
| #define NULL_CHECK_RETVAL(ptr) \ |
| do { \ |
| if (!(ptr)) { \ |
| RNDIS_IPA_ERROR("null pointer #ptr\n"); \ |
| ret = -EINVAL; \ |
| } \ |
| } \ |
| while (0) |
| |
| #define RNDIS_HDR_OFST(field) offsetof(struct rndis_pkt_hdr, field) |
| #define RNDIS_IPA_LOG_ENTRY() RNDIS_IPA_DEBUG("begin\n") |
| #define RNDIS_IPA_LOG_EXIT() RNDIS_IPA_DEBUG("end\n") |
| |
| /** |
| * enum rndis_ipa_state - specify the current driver internal state |
| * which is guarded by a state machine. |
| * |
| * The driver internal state changes due to its external API usage. |
| * The driver saves its internal state to guard from caller illegal |
| * call sequence. |
| * states: |
| * UNLOADED is the first state which is the default one and is also the state |
| * after the driver gets unloaded(cleanup). |
| * INITIALIZED is the driver state once it finished registering |
| * the network device and all internal data struct were initialized |
| * CONNECTED is the driver state once the USB pipes were connected to IPA |
| * UP is the driver state after the interface mode was set to UP but the |
| * pipes are not connected yet - this state is meta-stable state. |
| * CONNECTED_AND_UP is the driver state when the pipe were connected and |
| * the interface got UP request from the network stack. this is the driver |
| * idle operation state which allows it to transmit/receive data. |
| * INVALID is a state which is not allowed. |
| */ |
| enum rndis_ipa_state { |
| RNDIS_IPA_UNLOADED = 0, |
| RNDIS_IPA_INITIALIZED = 1, |
| RNDIS_IPA_CONNECTED = 2, |
| RNDIS_IPA_UP = 3, |
| RNDIS_IPA_CONNECTED_AND_UP = 4, |
| RNDIS_IPA_INVALID = 5, |
| }; |
| |
| /** |
| * enum rndis_ipa_operation - enumerations used to describe the API operation |
| * |
| * Those enums are used as input for the driver state machine. |
| */ |
| enum rndis_ipa_operation { |
| RNDIS_IPA_INITIALIZE, |
| RNDIS_IPA_CONNECT, |
| RNDIS_IPA_OPEN, |
| RNDIS_IPA_STOP, |
| RNDIS_IPA_DISCONNECT, |
| RNDIS_IPA_CLEANUP, |
| }; |
| |
| #define RNDIS_IPA_STATE_DEBUG(ctx) \ |
| RNDIS_IPA_DEBUG("Driver state: %s\n",\ |
| rndis_ipa_state_string((ctx)->state)) |
| |
| |
| /** |
| * struct rndis_ipa_dev - main driver context parameters |
| * |
| * @net: network interface struct implemented by this driver |
| * @directory: debugfs directory for various debugging switches |
| * @tx_filter: flag that enable/disable Tx path to continue to IPA |
| * @tx_dropped: number of filtered out Tx packets |
| * @tx_dump_enable: dump all Tx packets |
| * @rx_filter: flag that enable/disable Rx path to continue to IPA |
| * @rx_dropped: number of filtered out Rx packets |
| * @rx_dump_enable: dump all Rx packets |
| * @icmp_filter: allow all ICMP packet to pass through the filters |
| * @rm_enable: flag that enable/disable Resource manager request prior to Tx |
| * @deaggregation_enable: enable/disable IPA HW deaggregation logic |
| * @during_xmit_error: flags that indicate that the driver is in a middle |
| * of error handling in Tx path |
| * @directory: holds all debug flags used by the driver to allow cleanup |
| * for driver unload |
| * @eth_ipv4_hdr_hdl: saved handle for ipv4 header-insertion table |
| * @eth_ipv6_hdr_hdl: saved handle for ipv6 header-insertion table |
| * @usb_to_ipa_hdl: save handle for IPA pipe operations |
| * @ipa_to_usb_hdl: save handle for IPA pipe operations |
| * @outstanding_pkts: number of packets sent to IPA without TX complete ACKed |
| * @outstanding_high: number of outstanding packets allowed |
| * @outstanding_low: number of outstanding packets which shall cause |
| * to netdev queue start (after stopped due to outstanding_high reached) |
| * @error_msec_sleep_time: number of msec for sleeping in case of Tx error |
| * @state: current state of the driver |
| * @host_ethaddr: holds the tethered PC ethernet address |
| * @device_ethaddr: holds the device ethernet address |
| * @device_ready_notify: callback supplied by USB core driver |
| * This callback shall be called by the Netdev once the Netdev internal |
| * state is changed to RNDIS_IPA_CONNECTED_AND_UP |
| * @xmit_error_delayed_work: work item for cases where IPA driver Tx fails |
| * @state_lock: used to protect the state variable. |
| * @pm_hdl: handle for IPA PM framework |
| */ |
| struct rndis_ipa_dev { |
| struct net_device *net; |
| bool tx_filter; |
| u32 tx_dropped; |
| bool tx_dump_enable; |
| bool rx_filter; |
| u32 rx_dropped; |
| bool rx_dump_enable; |
| bool icmp_filter; |
| bool rm_enable; |
| bool deaggregation_enable; |
| bool during_xmit_error; |
| struct dentry *directory; |
| u32 eth_ipv4_hdr_hdl; |
| u32 eth_ipv6_hdr_hdl; |
| u32 usb_to_ipa_hdl; |
| u32 ipa_to_usb_hdl; |
| atomic_t outstanding_pkts; |
| u32 outstanding_high; |
| u32 outstanding_low; |
| u32 error_msec_sleep_time; |
| enum rndis_ipa_state state; |
| u8 host_ethaddr[ETH_ALEN]; |
| u8 device_ethaddr[ETH_ALEN]; |
| void (*device_ready_notify)(void); |
| struct delayed_work xmit_error_delayed_work; |
| spinlock_t state_lock; /* Spinlock for the state variable.*/ |
| u32 pm_hdl; |
| }; |
| |
| /** |
| * rndis_pkt_hdr - RNDIS_IPA representation of REMOTE_NDIS_PACKET_MSG |
| * @msg_type: for REMOTE_NDIS_PACKET_MSG this value should be 1 |
| * @msg_len: total message length in bytes, including RNDIS header an payload |
| * @data_ofst: offset in bytes from start of the data_ofst to payload |
| * @data_len: payload size in bytes |
| * @zeroes: OOB place holder - not used for RNDIS_IPA. |
| */ |
| struct rndis_pkt_hdr { |
| __le32 msg_type; |
| __le32 msg_len; |
| __le32 data_ofst; |
| __le32 data_len; |
| __le32 zeroes[7]; |
| } __packed__; |
| |
| static int rndis_ipa_open(struct net_device *net); |
| static void rndis_ipa_packet_receive_notify |
| (void *private, enum ipa_dp_evt_type evt, unsigned long data); |
| static void rndis_ipa_tx_complete_notify |
| (void *private, enum ipa_dp_evt_type evt, unsigned long data); |
| static void rndis_ipa_tx_timeout(struct net_device *net); |
| static int rndis_ipa_stop(struct net_device *net); |
| static void rndis_ipa_enable_data_path(struct rndis_ipa_dev *rndis_ipa_ctx); |
| static struct sk_buff *rndis_encapsulate_skb(struct sk_buff *skb); |
| static void rndis_ipa_xmit_error(struct sk_buff *skb); |
| static void rndis_ipa_xmit_error_aftercare_wq(struct work_struct *work); |
| static void rndis_ipa_prepare_header_insertion |
| (int eth_type, |
| const char *hdr_name, struct ipa_hdr_add *add_hdr, |
| const void *dst_mac, const void *src_mac); |
| static int rndis_ipa_hdrs_cfg |
| (struct rndis_ipa_dev *rndis_ipa_ctx, |
| const void *dst_mac, const void *src_mac); |
| static int rndis_ipa_hdrs_destroy(struct rndis_ipa_dev *rndis_ipa_ctx); |
| static struct net_device_stats *rndis_ipa_get_stats(struct net_device *net); |
| static int rndis_ipa_register_properties(char *netdev_name); |
| static int rndis_ipa_deregister_properties(char *netdev_name); |
| static void rndis_ipa_rm_notify |
| (void *user_data, enum ipa_rm_event event, |
| unsigned long data); |
| static int rndis_ipa_create_rm_resource(struct rndis_ipa_dev *rndis_ipa_ctx); |
| static int rndis_ipa_destroy_rm_resource(struct rndis_ipa_dev *rndis_ipa_ctx); |
| static int rndis_ipa_register_pm_client(struct rndis_ipa_dev *rndis_ipa_ctx); |
| static int rndis_ipa_deregister_pm_client(struct rndis_ipa_dev *rndis_ipa_ctx); |
| static bool rx_filter(struct sk_buff *skb); |
| static bool tx_filter(struct sk_buff *skb); |
| static bool rm_enabled(struct rndis_ipa_dev *rndis_ipa_ctx); |
| static int resource_request(struct rndis_ipa_dev *rndis_ipa_ctx); |
| static void resource_release(struct rndis_ipa_dev *rndis_ipa_ctx); |
| static netdev_tx_t rndis_ipa_start_xmit |
| (struct sk_buff *skb, struct net_device *net); |
| static int rndis_ipa_debugfs_atomic_open |
| (struct inode *inode, struct file *file); |
| static int rndis_ipa_debugfs_aggr_open |
| (struct inode *inode, struct file *file); |
| static ssize_t rndis_ipa_debugfs_aggr_write |
| (struct file *file, |
| const char __user *buf, size_t count, loff_t *ppos); |
| static ssize_t rndis_ipa_debugfs_atomic_read |
| (struct file *file, |
| char __user *ubuf, size_t count, loff_t *ppos); |
| static void rndis_ipa_dump_skb(struct sk_buff *skb); |
| static void rndis_ipa_debugfs_init(struct rndis_ipa_dev *rndis_ipa_ctx); |
| static void rndis_ipa_debugfs_destroy(struct rndis_ipa_dev *rndis_ipa_ctx); |
| static int rndis_ipa_ep_registers_cfg |
| (u32 usb_to_ipa_hdl, |
| u32 ipa_to_usb_hdl, u32 max_xfer_size_bytes_to_dev, |
| u32 max_xfer_size_bytes_to_host, u32 mtu, |
| bool deaggr_enable); |
| static int rndis_ipa_set_device_ethernet_addr |
| (u8 *dev_ethaddr, |
| u8 device_ethaddr[]); |
| static enum rndis_ipa_state rndis_ipa_next_state |
| (enum rndis_ipa_state current_state, |
| enum rndis_ipa_operation operation); |
| static const char *rndis_ipa_state_string(enum rndis_ipa_state state); |
| static int rndis_ipa_init_module(void); |
| static void rndis_ipa_cleanup_module(void); |
| |
| struct rndis_ipa_dev *rndis_ipa; |
| |
| static const struct net_device_ops rndis_ipa_netdev_ops = { |
| .ndo_open = rndis_ipa_open, |
| .ndo_stop = rndis_ipa_stop, |
| .ndo_start_xmit = rndis_ipa_start_xmit, |
| .ndo_tx_timeout = rndis_ipa_tx_timeout, |
| .ndo_get_stats = rndis_ipa_get_stats, |
| .ndo_set_mac_address = eth_mac_addr, |
| }; |
| |
| const struct file_operations rndis_ipa_debugfs_atomic_ops = { |
| .open = rndis_ipa_debugfs_atomic_open, |
| .read = rndis_ipa_debugfs_atomic_read, |
| }; |
| |
| const struct file_operations rndis_ipa_aggr_ops = { |
| .open = rndis_ipa_debugfs_aggr_open, |
| .write = rndis_ipa_debugfs_aggr_write, |
| }; |
| |
| static struct ipa_ep_cfg ipa_to_usb_ep_cfg = { |
| .mode = { |
| .mode = IPA_BASIC, |
| .dst = IPA_CLIENT_APPS_LAN_CONS, |
| }, |
| .hdr = { |
| .hdr_len = ETH_HLEN + sizeof(struct rndis_pkt_hdr), |
| .hdr_ofst_metadata_valid = false, |
| .hdr_ofst_metadata = 0, |
| .hdr_additional_const_len = ETH_HLEN, |
| .hdr_ofst_pkt_size_valid = true, |
| .hdr_ofst_pkt_size = 3 * sizeof(u32), |
| .hdr_a5_mux = false, |
| .hdr_remove_additional = false, |
| .hdr_metadata_reg_valid = false, |
| }, |
| .hdr_ext = { |
| .hdr_pad_to_alignment = 0, |
| .hdr_total_len_or_pad_offset = 1 * sizeof(u32), |
| .hdr_payload_len_inc_padding = false, |
| .hdr_total_len_or_pad = IPA_HDR_TOTAL_LEN, |
| .hdr_total_len_or_pad_valid = true, |
| .hdr_little_endian = true, |
| }, |
| .aggr = { |
| .aggr_en = IPA_ENABLE_AGGR, |
| .aggr = IPA_GENERIC, |
| .aggr_byte_limit = 4, |
| .aggr_time_limit = DEFAULT_AGGR_TIME_LIMIT, |
| .aggr_pkt_limit = DEFAULT_AGGR_PKT_LIMIT |
| }, |
| .deaggr = { |
| .deaggr_hdr_len = 0, |
| .packet_offset_valid = 0, |
| .packet_offset_location = 0, |
| .max_packet_len = 0, |
| }, |
| .route = { |
| .rt_tbl_hdl = RNDIS_IPA_DFLT_RT_HDL, |
| }, |
| .nat = { |
| .nat_en = IPA_SRC_NAT, |
| }, |
| }; |
| |
| static struct ipa_ep_cfg usb_to_ipa_ep_cfg_deaggr_dis = { |
| .mode = { |
| .mode = IPA_BASIC, |
| .dst = IPA_CLIENT_APPS_LAN_CONS, |
| }, |
| .hdr = { |
| .hdr_len = ETH_HLEN + sizeof(struct rndis_pkt_hdr), |
| .hdr_ofst_metadata_valid = false, |
| .hdr_ofst_metadata = 0, |
| .hdr_additional_const_len = 0, |
| .hdr_ofst_pkt_size_valid = true, |
| .hdr_ofst_pkt_size = 3 * sizeof(u32) + |
| sizeof(struct rndis_pkt_hdr), |
| .hdr_a5_mux = false, |
| .hdr_remove_additional = false, |
| .hdr_metadata_reg_valid = false, |
| }, |
| .hdr_ext = { |
| .hdr_pad_to_alignment = 0, |
| .hdr_total_len_or_pad_offset = 1 * sizeof(u32), |
| .hdr_payload_len_inc_padding = false, |
| .hdr_total_len_or_pad = IPA_HDR_TOTAL_LEN, |
| .hdr_total_len_or_pad_valid = true, |
| .hdr_little_endian = true, |
| }, |
| |
| .aggr = { |
| .aggr_en = IPA_BYPASS_AGGR, |
| .aggr = 0, |
| .aggr_byte_limit = 0, |
| .aggr_time_limit = 0, |
| .aggr_pkt_limit = 0, |
| }, |
| .deaggr = { |
| .deaggr_hdr_len = 0, |
| .packet_offset_valid = false, |
| .packet_offset_location = 0, |
| .max_packet_len = 0, |
| }, |
| |
| .route = { |
| .rt_tbl_hdl = RNDIS_IPA_DFLT_RT_HDL, |
| }, |
| .nat = { |
| .nat_en = IPA_BYPASS_NAT, |
| }, |
| }; |
| |
| static struct ipa_ep_cfg usb_to_ipa_ep_cfg_deaggr_en = { |
| .mode = { |
| .mode = IPA_BASIC, |
| .dst = IPA_CLIENT_APPS_LAN_CONS, |
| }, |
| .hdr = { |
| .hdr_len = ETH_HLEN, |
| .hdr_ofst_metadata_valid = false, |
| .hdr_ofst_metadata = 0, |
| .hdr_additional_const_len = 0, |
| .hdr_ofst_pkt_size_valid = true, |
| .hdr_ofst_pkt_size = 3 * sizeof(u32), |
| .hdr_a5_mux = false, |
| .hdr_remove_additional = false, |
| .hdr_metadata_reg_valid = false, |
| }, |
| .hdr_ext = { |
| .hdr_pad_to_alignment = 0, |
| .hdr_total_len_or_pad_offset = 1 * sizeof(u32), |
| .hdr_payload_len_inc_padding = false, |
| .hdr_total_len_or_pad = IPA_HDR_TOTAL_LEN, |
| .hdr_total_len_or_pad_valid = true, |
| .hdr_little_endian = true, |
| }, |
| .aggr = { |
| .aggr_en = IPA_ENABLE_DEAGGR, |
| .aggr = IPA_GENERIC, |
| .aggr_byte_limit = 0, |
| .aggr_time_limit = 0, |
| .aggr_pkt_limit = 0, |
| }, |
| .deaggr = { |
| .deaggr_hdr_len = sizeof(struct rndis_pkt_hdr), |
| .packet_offset_valid = true, |
| .packet_offset_location = 8, |
| .max_packet_len = 8192, /* Will be overridden*/ |
| }, |
| .route = { |
| .rt_tbl_hdl = RNDIS_IPA_DFLT_RT_HDL, |
| }, |
| .nat = { |
| .nat_en = IPA_BYPASS_NAT, |
| }, |
| }; |
| |
| /** |
| * rndis_template_hdr - RNDIS template structure for RNDIS_IPA SW insertion |
| * @msg_type: set for REMOTE_NDIS_PACKET_MSG (0x00000001) |
| * this value will be used for all data packets |
| * @msg_len: will add the skb length to get final size |
| * @data_ofst: this field value will not be changed |
| * @data_len: set as skb length to get final size |
| * @zeroes: make sure all OOB data is not used |
| */ |
| struct rndis_pkt_hdr rndis_template_hdr = { |
| .msg_type = RNDIS_IPA_PKT_TYPE, |
| .msg_len = sizeof(struct rndis_pkt_hdr), |
| .data_ofst = sizeof(struct rndis_pkt_hdr) - RNDIS_HDR_OFST(data_ofst), |
| .data_len = 0, |
| .zeroes = {0}, |
| }; |
| |
| /** |
| * rndis_ipa_init() - create network device and initialize internal |
| * data structures |
| * @params: in/out parameters required for initialization, |
| * see "struct ipa_usb_init_params" for more details |
| * |
| * Shall be called prior to pipe connection. |
| * Detailed description: |
| * - allocate the network device |
| * - set default values for driver internal switches and stash them inside |
| * the netdev private field |
| * - set needed headroom for RNDIS header |
| * - create debugfs folder and files |
| * - create IPA resource manager client |
| * - set the ethernet address for the netdev to be added on SW Tx path |
| * - add header insertion rules for IPA driver (based on host/device Ethernet |
| * addresses given in input params and on RNDIS data template struct) |
| * - register tx/rx properties to IPA driver (will be later used |
| * by IPA configuration manager to configure rest of the IPA rules) |
| * - set the carrier state to "off" (until connect is called) |
| * - register the network device |
| * - set the out parameters |
| * - change driver internal state to INITIALIZED |
| * |
| * Returns negative errno, or zero on success |
| */ |
| int rndis_ipa_init(struct ipa_usb_init_params *params) |
| { |
| int result = 0; |
| struct net_device *net; |
| struct rndis_ipa_dev *rndis_ipa_ctx; |
| int ret; |
| |
| RNDIS_IPA_LOG_ENTRY(); |
| RNDIS_IPA_DEBUG("%s initializing\n", DRV_NAME); |
| ret = 0; |
| NULL_CHECK_RETVAL(params); |
| if (ret) |
| return ret; |
| |
| RNDIS_IPA_DEBUG |
| ("host_ethaddr=%pM, device_ethaddr=%pM\n", |
| params->host_ethaddr, |
| params->device_ethaddr); |
| |
| net = alloc_etherdev(sizeof(struct rndis_ipa_dev)); |
| if (!net) { |
| result = -ENOMEM; |
| RNDIS_IPA_ERROR("fail to allocate Ethernet device\n"); |
| goto fail_alloc_etherdev; |
| } |
| RNDIS_IPA_DEBUG("network device was successfully allocated\n"); |
| |
| rndis_ipa_ctx = netdev_priv(net); |
| if (!rndis_ipa_ctx) { |
| result = -ENOMEM; |
| RNDIS_IPA_ERROR("fail to extract netdev priv\n"); |
| goto fail_netdev_priv; |
| } |
| memset(rndis_ipa_ctx, 0, sizeof(*rndis_ipa_ctx)); |
| RNDIS_IPA_DEBUG("rndis_ipa_ctx (private)=%p\n", rndis_ipa_ctx); |
| |
| spin_lock_init(&rndis_ipa_ctx->state_lock); |
| |
| rndis_ipa_ctx->net = net; |
| rndis_ipa_ctx->tx_filter = false; |
| rndis_ipa_ctx->rx_filter = false; |
| rndis_ipa_ctx->icmp_filter = true; |
| rndis_ipa_ctx->rm_enable = true; |
| rndis_ipa_ctx->tx_dropped = 0; |
| rndis_ipa_ctx->rx_dropped = 0; |
| rndis_ipa_ctx->tx_dump_enable = false; |
| rndis_ipa_ctx->rx_dump_enable = false; |
| rndis_ipa_ctx->deaggregation_enable = false; |
| rndis_ipa_ctx->outstanding_high = DEFAULT_OUTSTANDING_HIGH; |
| rndis_ipa_ctx->outstanding_low = DEFAULT_OUTSTANDING_LOW; |
| atomic_set(&rndis_ipa_ctx->outstanding_pkts, 0); |
| memcpy |
| (rndis_ipa_ctx->device_ethaddr, params->device_ethaddr, |
| sizeof(rndis_ipa_ctx->device_ethaddr)); |
| memcpy |
| (rndis_ipa_ctx->host_ethaddr, params->host_ethaddr, |
| sizeof(rndis_ipa_ctx->host_ethaddr)); |
| INIT_DELAYED_WORK |
| (&rndis_ipa_ctx->xmit_error_delayed_work, |
| rndis_ipa_xmit_error_aftercare_wq); |
| rndis_ipa_ctx->error_msec_sleep_time = |
| MIN_TX_ERROR_SLEEP_PERIOD; |
| RNDIS_IPA_DEBUG("internal data structures were set\n"); |
| |
| if (!params->device_ready_notify) |
| RNDIS_IPA_DEBUG("device_ready_notify() was not supplied\n"); |
| rndis_ipa_ctx->device_ready_notify = params->device_ready_notify; |
| |
| snprintf(net->name, sizeof(net->name), "%s%%d", NETDEV_NAME); |
| RNDIS_IPA_DEBUG |
| ("Setting network interface driver name to: %s\n", |
| net->name); |
| |
| net->netdev_ops = &rndis_ipa_netdev_ops; |
| net->watchdog_timeo = TX_TIMEOUT; |
| |
| net->needed_headroom = sizeof(rndis_template_hdr); |
| RNDIS_IPA_DEBUG |
| ("Needed headroom for RNDIS header set to %d\n", |
| net->needed_headroom); |
| |
| rndis_ipa_debugfs_init(rndis_ipa_ctx); |
| |
| result = rndis_ipa_set_device_ethernet_addr |
| (net->dev_addr, rndis_ipa_ctx->device_ethaddr); |
| if (result) { |
| RNDIS_IPA_ERROR("set device MAC failed\n"); |
| goto fail_set_device_ethernet; |
| } |
| RNDIS_IPA_DEBUG("Device Ethernet address set %pM\n", net->dev_addr); |
| |
| result = rndis_ipa_hdrs_cfg |
| (rndis_ipa_ctx, |
| params->host_ethaddr, |
| params->device_ethaddr); |
| if (result) { |
| RNDIS_IPA_ERROR("fail on ipa hdrs set\n"); |
| goto fail_hdrs_cfg; |
| } |
| RNDIS_IPA_DEBUG("IPA header-insertion configed for Ethernet+RNDIS\n"); |
| |
| result = rndis_ipa_register_properties(net->name); |
| if (result) { |
| RNDIS_IPA_ERROR("fail on properties set\n"); |
| goto fail_register_tx; |
| } |
| RNDIS_IPA_DEBUG("2 TX and 2 RX properties were registered\n"); |
| |
| netif_carrier_off(net); |
| RNDIS_IPA_DEBUG("set carrier off until pipes are connected\n"); |
| |
| result = register_netdev(net); |
| if (result) { |
| RNDIS_IPA_ERROR("register_netdev failed: %d\n", result); |
| goto fail_register_netdev; |
| } |
| RNDIS_IPA_DEBUG |
| ("netdev:%s registration succeeded, index=%d\n", |
| net->name, net->ifindex); |
| |
| rndis_ipa = rndis_ipa_ctx; |
| params->ipa_rx_notify = rndis_ipa_packet_receive_notify; |
| params->ipa_tx_notify = rndis_ipa_tx_complete_notify; |
| params->private = rndis_ipa_ctx; |
| params->skip_ep_cfg = false; |
| rndis_ipa_ctx->state = RNDIS_IPA_INITIALIZED; |
| RNDIS_IPA_STATE_DEBUG(rndis_ipa_ctx); |
| pr_info("RNDIS_IPA NetDev was initialized"); |
| |
| RNDIS_IPA_LOG_EXIT(); |
| |
| return 0; |
| |
| fail_register_netdev: |
| rndis_ipa_deregister_properties(net->name); |
| fail_register_tx: |
| rndis_ipa_hdrs_destroy(rndis_ipa_ctx); |
| fail_set_device_ethernet: |
| fail_hdrs_cfg: |
| rndis_ipa_debugfs_destroy(rndis_ipa_ctx); |
| fail_netdev_priv: |
| free_netdev(net); |
| fail_alloc_etherdev: |
| return result; |
| } |
| EXPORT_SYMBOL(rndis_ipa_init); |
| |
| /** |
| * rndis_ipa_pipe_connect_notify() - notify rndis_ipa Netdev that the USB pipes |
| * were connected |
| * @usb_to_ipa_hdl: handle from IPA driver client for USB->IPA |
| * @ipa_to_usb_hdl: handle from IPA driver client for IPA->USB |
| * @private: same value that was set by init(), this parameter holds the |
| * network device pointer. |
| * @max_transfer_byte_size: RNDIS protocol specific, the maximum size that |
| * the host expect |
| * @max_packet_number: RNDIS protocol specific, the maximum packet number |
| * that the host expects |
| * |
| * Once USB driver finishes the pipe connection between IPA core |
| * and USB core this method shall be called in order to |
| * allow the driver to complete the data path configurations. |
| * Detailed description: |
| * - configure the IPA end-points register |
| * - notify the Linux kernel for "carrier_on" |
| * - change the driver internal state |
| * |
| * After this function is done the driver state changes to "Connected" or |
| * Connected and Up. |
| * This API is expected to be called after initialization() or |
| * after a call to disconnect(). |
| * |
| * Returns negative errno, or zero on success |
| */ |
| int rndis_ipa_pipe_connect_notify( |
| u32 usb_to_ipa_hdl, |
| u32 ipa_to_usb_hdl, |
| u32 max_xfer_size_bytes_to_dev, |
| u32 max_packet_number_to_dev, |
| u32 max_xfer_size_bytes_to_host, |
| void *private) |
| { |
| struct rndis_ipa_dev *rndis_ipa_ctx = private; |
| int next_state; |
| int result; |
| int ret; |
| unsigned long flags; |
| |
| RNDIS_IPA_LOG_ENTRY(); |
| |
| ret = 0; |
| NULL_CHECK_RETVAL(private); |
| |
| if (ret) |
| return ret; |
| |
| RNDIS_IPA_DEBUG |
| ("usb_to_ipa_hdl=%d, ipa_to_usb_hdl=%d, private=0x%p\n", |
| usb_to_ipa_hdl, ipa_to_usb_hdl, private); |
| RNDIS_IPA_DEBUG |
| ("max_xfer_sz_to_dev=%d, max_pkt_num_to_dev=%d\n", |
| max_xfer_size_bytes_to_dev, |
| max_packet_number_to_dev); |
| RNDIS_IPA_DEBUG |
| ("max_xfer_sz_to_host=%d\n", |
| max_xfer_size_bytes_to_host); |
| |
| spin_lock_irqsave(&rndis_ipa_ctx->state_lock, flags); |
| next_state = rndis_ipa_next_state |
| (rndis_ipa_ctx->state, |
| RNDIS_IPA_CONNECT); |
| if (next_state == RNDIS_IPA_INVALID) { |
| spin_unlock_irqrestore(&rndis_ipa_ctx->state_lock, flags); |
| RNDIS_IPA_ERROR("use init()/disconnect() before connect()\n"); |
| return -EPERM; |
| } |
| spin_unlock_irqrestore(&rndis_ipa_ctx->state_lock, flags); |
| |
| if (usb_to_ipa_hdl >= IPA_CLIENT_MAX) { |
| RNDIS_IPA_ERROR |
| ("usb_to_ipa_hdl(%d) - not valid ipa handle\n", |
| usb_to_ipa_hdl); |
| return -EINVAL; |
| } |
| if (ipa_to_usb_hdl >= IPA_CLIENT_MAX) { |
| RNDIS_IPA_ERROR |
| ("ipa_to_usb_hdl(%d) - not valid ipa handle\n", |
| ipa_to_usb_hdl); |
| return -EINVAL; |
| } |
| |
| if (ipa_pm_is_used()) |
| result = rndis_ipa_register_pm_client(rndis_ipa_ctx); |
| else |
| result = rndis_ipa_create_rm_resource(rndis_ipa_ctx); |
| if (result) { |
| RNDIS_IPA_ERROR("fail on RM create\n"); |
| goto fail_create_rm; |
| } |
| RNDIS_IPA_DEBUG("RM resource was created\n"); |
| |
| rndis_ipa_ctx->ipa_to_usb_hdl = ipa_to_usb_hdl; |
| rndis_ipa_ctx->usb_to_ipa_hdl = usb_to_ipa_hdl; |
| if (max_packet_number_to_dev > 1) |
| rndis_ipa_ctx->deaggregation_enable = true; |
| else |
| rndis_ipa_ctx->deaggregation_enable = false; |
| result = rndis_ipa_ep_registers_cfg |
| (usb_to_ipa_hdl, |
| ipa_to_usb_hdl, |
| max_xfer_size_bytes_to_dev, |
| max_xfer_size_bytes_to_host, |
| rndis_ipa_ctx->net->mtu, |
| rndis_ipa_ctx->deaggregation_enable); |
| if (result) { |
| RNDIS_IPA_ERROR("fail on ep cfg\n"); |
| goto fail; |
| } |
| RNDIS_IPA_DEBUG("end-points configured\n"); |
| |
| netif_stop_queue(rndis_ipa_ctx->net); |
| RNDIS_IPA_DEBUG("netif_stop_queue() was called\n"); |
| |
| netif_carrier_on(rndis_ipa_ctx->net); |
| if (!netif_carrier_ok(rndis_ipa_ctx->net)) { |
| RNDIS_IPA_ERROR("netif_carrier_ok error\n"); |
| result = -EBUSY; |
| goto fail; |
| } |
| RNDIS_IPA_DEBUG("netif_carrier_on() was called\n"); |
| |
| spin_lock_irqsave(&rndis_ipa_ctx->state_lock, flags); |
| next_state = rndis_ipa_next_state(rndis_ipa_ctx->state, |
| RNDIS_IPA_CONNECT); |
| if (next_state == RNDIS_IPA_INVALID) { |
| spin_unlock_irqrestore(&rndis_ipa_ctx->state_lock, flags); |
| RNDIS_IPA_ERROR("use init()/disconnect() before connect()\n"); |
| return -EPERM; |
| } |
| rndis_ipa_ctx->state = next_state; |
| spin_unlock_irqrestore(&rndis_ipa_ctx->state_lock, flags); |
| |
| RNDIS_IPA_STATE_DEBUG(rndis_ipa_ctx); |
| |
| if (next_state == RNDIS_IPA_CONNECTED_AND_UP) |
| rndis_ipa_enable_data_path(rndis_ipa_ctx); |
| else |
| RNDIS_IPA_DEBUG("queue shall be started after open()\n"); |
| |
| pr_info("RNDIS_IPA NetDev pipes were connected\n"); |
| |
| RNDIS_IPA_LOG_EXIT(); |
| |
| return 0; |
| |
| fail: |
| if (ipa_pm_is_used()) |
| rndis_ipa_deregister_pm_client(rndis_ipa_ctx); |
| else |
| rndis_ipa_destroy_rm_resource(rndis_ipa_ctx); |
| fail_create_rm: |
| return result; |
| } |
| EXPORT_SYMBOL(rndis_ipa_pipe_connect_notify); |
| |
| /** |
| * rndis_ipa_open() - notify Linux network stack to start sending packets |
| * @net: the network interface supplied by the network stack |
| * |
| * Linux uses this API to notify the driver that the network interface |
| * transitions to the up state. |
| * The driver will instruct the Linux network stack to start |
| * delivering data packets. |
| * The driver internal state shall be changed to Up or Connected and Up |
| * |
| * Returns negative errno, or zero on success |
| */ |
| static int rndis_ipa_open(struct net_device *net) |
| { |
| struct rndis_ipa_dev *rndis_ipa_ctx; |
| int next_state; |
| unsigned long flags; |
| |
| RNDIS_IPA_LOG_ENTRY(); |
| |
| rndis_ipa_ctx = netdev_priv(net); |
| |
| spin_lock_irqsave(&rndis_ipa_ctx->state_lock, flags); |
| |
| next_state = rndis_ipa_next_state(rndis_ipa_ctx->state, RNDIS_IPA_OPEN); |
| if (next_state == RNDIS_IPA_INVALID) { |
| spin_unlock_irqrestore(&rndis_ipa_ctx->state_lock, flags); |
| RNDIS_IPA_ERROR("can't bring driver up before initialize\n"); |
| return -EPERM; |
| } |
| |
| rndis_ipa_ctx->state = next_state; |
| |
| spin_unlock_irqrestore(&rndis_ipa_ctx->state_lock, flags); |
| |
| RNDIS_IPA_STATE_DEBUG(rndis_ipa_ctx); |
| |
| if (next_state == RNDIS_IPA_CONNECTED_AND_UP) |
| rndis_ipa_enable_data_path(rndis_ipa_ctx); |
| else |
| RNDIS_IPA_DEBUG("queue shall be started after connect()\n"); |
| |
| pr_info("RNDIS_IPA NetDev was opened\n"); |
| |
| RNDIS_IPA_LOG_EXIT(); |
| |
| return 0; |
| } |
| |
| /** |
| * rndis_ipa_start_xmit() - send data from APPs to USB core via IPA core |
| * using SW path (Tx data path) |
| * Tx path for this Netdev is Apps-processor->IPA->USB |
| * @skb: packet received from Linux network stack destined for tethered PC |
| * @net: the network device being used to send this packet (rndis0) |
| * |
| * Several conditions needed in order to send the packet to IPA: |
| * - Transmit queue for the network driver is currently |
| * in "started" state |
| * - The driver internal state is in Connected and Up state. |
| * - Filters Tx switch are turned off |
| * - The IPA resource manager state for the driver producer client |
| * is "Granted" which implies that all the resources in the dependency |
| * graph are valid for data flow. |
| * - outstanding high boundary was not reached. |
| * |
| * In case the outstanding packets high boundary is reached, the driver will |
| * stop the send queue until enough packets are processed by |
| * the IPA core (based on calls to rndis_ipa_tx_complete_notify). |
| * |
| * In case all of the conditions are met, the network driver shall: |
| * - encapsulate the Ethernet packet with RNDIS header (REMOTE_NDIS_PACKET_MSG) |
| * - send the packet by using IPA Driver SW path (IP_PACKET_INIT) |
| * - Netdev status fields shall be updated based on the current Tx packet |
| * |
| * Returns NETDEV_TX_BUSY if retry should be made later, |
| * or NETDEV_TX_OK on success. |
| */ |
| static netdev_tx_t rndis_ipa_start_xmit(struct sk_buff *skb, |
| struct net_device *net) |
| { |
| int ret; |
| netdev_tx_t status = NETDEV_TX_BUSY; |
| struct rndis_ipa_dev *rndis_ipa_ctx = netdev_priv(net); |
| |
| netif_trans_update(net); |
| |
| RNDIS_IPA_DEBUG |
| ("Tx, len=%d, skb->protocol=%d, outstanding=%d\n", |
| skb->len, skb->protocol, |
| atomic_read(&rndis_ipa_ctx->outstanding_pkts)); |
| |
| if (unlikely(netif_queue_stopped(net))) { |
| RNDIS_IPA_ERROR("interface queue is stopped\n"); |
| goto out; |
| } |
| |
| if (unlikely(rndis_ipa_ctx->tx_dump_enable)) |
| rndis_ipa_dump_skb(skb); |
| |
| if (unlikely(rndis_ipa_ctx->state != RNDIS_IPA_CONNECTED_AND_UP)) { |
| RNDIS_IPA_ERROR("Missing pipe connected and/or iface up\n"); |
| return NETDEV_TX_BUSY; |
| } |
| |
| if (unlikely(tx_filter(skb))) { |
| dev_kfree_skb_any(skb); |
| RNDIS_IPA_DEBUG("packet got filtered out on Tx path\n"); |
| rndis_ipa_ctx->tx_dropped++; |
| status = NETDEV_TX_OK; |
| goto out; |
| } |
| |
| ret = resource_request(rndis_ipa_ctx); |
| if (ret) { |
| RNDIS_IPA_DEBUG("Waiting to resource\n"); |
| netif_stop_queue(net); |
| goto resource_busy; |
| } |
| |
| if (atomic_read(&rndis_ipa_ctx->outstanding_pkts) >= |
| rndis_ipa_ctx->outstanding_high) { |
| RNDIS_IPA_DEBUG("Outstanding high boundary reached (%d)\n", |
| rndis_ipa_ctx->outstanding_high); |
| netif_stop_queue(net); |
| RNDIS_IPA_DEBUG("send queue was stopped\n"); |
| status = NETDEV_TX_BUSY; |
| goto out; |
| } |
| |
| skb = rndis_encapsulate_skb(skb); |
| trace_rndis_tx_dp(skb->protocol); |
| ret = ipa_tx_dp(IPA_TO_USB_CLIENT, skb, NULL); |
| if (ret) { |
| RNDIS_IPA_ERROR("ipa transmit failed (%d)\n", ret); |
| goto fail_tx_packet; |
| } |
| |
| atomic_inc(&rndis_ipa_ctx->outstanding_pkts); |
| |
| status = NETDEV_TX_OK; |
| goto out; |
| |
| fail_tx_packet: |
| rndis_ipa_xmit_error(skb); |
| out: |
| resource_release(rndis_ipa_ctx); |
| resource_busy: |
| RNDIS_IPA_DEBUG |
| ("packet Tx done - %s\n", |
| (status == NETDEV_TX_OK) ? "OK" : "FAIL"); |
| |
| return status; |
| } |
| |
| /** |
| * rndis_ipa_tx_complete_notify() - notification for Netdev that the |
| * last packet was successfully sent |
| * @private: driver context stashed by IPA driver upon pipe connect |
| * @evt: event type (expected to be write-done event) |
| * @data: data provided with event (this is actually the skb that |
| * holds the sent packet) |
| * |
| * This function will be called on interrupt bottom halve deferred context. |
| * outstanding packets counter shall be decremented. |
| * Network stack send queue will be re-started in case low outstanding |
| * boundary is reached and queue was stopped before. |
| * At the end the skb shall be freed. |
| */ |
| static void rndis_ipa_tx_complete_notify( |
| void *private, |
| enum ipa_dp_evt_type evt, |
| unsigned long data) |
| { |
| struct sk_buff *skb = (struct sk_buff *)data; |
| struct rndis_ipa_dev *rndis_ipa_ctx = private; |
| int ret; |
| |
| ret = 0; |
| NULL_CHECK_RETVAL(private); |
| if (ret) |
| return; |
| |
| trace_rndis_status_rcvd(skb->protocol); |
| |
| RNDIS_IPA_DEBUG |
| ("Tx-complete, len=%d, skb->prot=%d, outstanding=%d\n", |
| skb->len, skb->protocol, |
| atomic_read(&rndis_ipa_ctx->outstanding_pkts)); |
| |
| if (unlikely((evt != IPA_WRITE_DONE))) { |
| RNDIS_IPA_ERROR("unsupported event on TX call-back\n"); |
| return; |
| } |
| |
| if (unlikely(rndis_ipa_ctx->state != RNDIS_IPA_CONNECTED_AND_UP)) { |
| RNDIS_IPA_DEBUG |
| ("dropping Tx-complete pkt, state=%s\n", |
| rndis_ipa_state_string(rndis_ipa_ctx->state)); |
| goto out; |
| } |
| |
| rndis_ipa_ctx->net->stats.tx_packets++; |
| rndis_ipa_ctx->net->stats.tx_bytes += skb->len; |
| |
| atomic_dec(&rndis_ipa_ctx->outstanding_pkts); |
| if |
| (netif_queue_stopped(rndis_ipa_ctx->net) && |
| netif_carrier_ok(rndis_ipa_ctx->net) && |
| atomic_read(&rndis_ipa_ctx->outstanding_pkts) < |
| (rndis_ipa_ctx->outstanding_low)) { |
| RNDIS_IPA_DEBUG("outstanding low boundary reached (%d)n", |
| rndis_ipa_ctx->outstanding_low); |
| netif_wake_queue(rndis_ipa_ctx->net); |
| RNDIS_IPA_DEBUG("send queue was awaken\n"); |
| } |
| |
| out: |
| dev_kfree_skb_any(skb); |
| } |
| |
| static void rndis_ipa_tx_timeout(struct net_device *net) |
| { |
| struct rndis_ipa_dev *rndis_ipa_ctx = netdev_priv(net); |
| int outstanding = atomic_read(&rndis_ipa_ctx->outstanding_pkts); |
| |
| RNDIS_IPA_ERROR |
| ("possible IPA stall was detected, %d outstanding\n", |
| outstanding); |
| |
| net->stats.tx_errors++; |
| } |
| |
| /** |
| * rndis_ipa_rm_notify() - callback supplied to IPA resource manager |
| * for grant/release events |
| * user_data: the driver context supplied to IPA resource manager during call |
| * to ipa_rm_create_resource(). |
| * event: the event notified to us by IPA resource manager (Release/Grant) |
| * data: reserved field supplied by IPA resource manager |
| * |
| * This callback shall be called based on resource request/release sent |
| * to the IPA resource manager. |
| * In case the queue was stopped during EINPROGRESS for Tx path and the |
| * event received is Grant then the queue shall be restarted. |
| * In case the event notified is a release notification the netdev discard it. |
| */ |
| static void rndis_ipa_rm_notify( |
| void *user_data, enum ipa_rm_event event, |
| unsigned long data) |
| { |
| struct rndis_ipa_dev *rndis_ipa_ctx = user_data; |
| |
| RNDIS_IPA_LOG_ENTRY(); |
| |
| if (event == IPA_RM_RESOURCE_RELEASED) { |
| RNDIS_IPA_DEBUG("Resource Released\n"); |
| return; |
| } |
| |
| if (event != IPA_RM_RESOURCE_GRANTED) { |
| RNDIS_IPA_ERROR |
| ("Unexceoted event receieved from RM (%d\n)", event); |
| return; |
| } |
| RNDIS_IPA_DEBUG("Resource Granted\n"); |
| |
| if (netif_queue_stopped(rndis_ipa_ctx->net)) { |
| RNDIS_IPA_DEBUG("starting queue\n"); |
| netif_start_queue(rndis_ipa_ctx->net); |
| } else { |
| RNDIS_IPA_DEBUG("queue already awake\n"); |
| } |
| |
| RNDIS_IPA_LOG_EXIT(); |
| } |
| |
| /** |
| * rndis_ipa_packet_receive_notify() - Rx notify for packet sent from |
| * tethered PC (USB->IPA). |
| * is USB->IPA->Apps-processor |
| * @private: driver context |
| * @evt: event type |
| * @data: data provided with event |
| * |
| * Once IPA driver receives a packet from USB client this callback will be |
| * called from bottom-half interrupt handling context (ipa Rx workqueue). |
| * |
| * Packets that shall be sent to Apps processor may be of two types: |
| * 1) Packets that are destined for Apps (e.g: WEBSERVER running on Apps) |
| * 2) Exception packets that need special handling (based on IPA core |
| * configuration, e.g: new TCP session or any other packets that IPA core |
| * can't handle) |
| * If the next conditions are met, the packet shall be sent up to the |
| * Linux network stack: |
| * - Driver internal state is Connected and Up |
| * - Notification received from IPA driver meets the expected type |
| * for Rx packet |
| * -Filters Rx switch are turned off |
| * |
| * Prior to the sending to the network stack: |
| * - Netdev struct shall be stashed to the skb as required by the network stack |
| * - Ethernet header shall be removed (skb->data shall point to the Ethernet |
| * payload, Ethernet still stashed under MAC header). |
| * - The skb->pkt_protocol shall be set based on the ethernet destination |
| * address, Can be Broadcast, Multicast or Other-Host, The later |
| * pkt-types packets shall be dropped in case the Netdev is not |
| * in promisc mode. |
| * - Set the skb protocol field based on the EtherType field |
| * |
| * Netdev status fields shall be updated based on the current Rx packet |
| */ |
| static void rndis_ipa_packet_receive_notify( |
| void *private, |
| enum ipa_dp_evt_type evt, |
| unsigned long data) |
| { |
| struct sk_buff *skb = (struct sk_buff *)data; |
| struct rndis_ipa_dev *rndis_ipa_ctx = private; |
| int result; |
| unsigned int packet_len = skb->len; |
| |
| RNDIS_IPA_DEBUG |
| ("packet Rx, len=%d\n", |
| skb->len); |
| |
| if (unlikely(rndis_ipa_ctx->rx_dump_enable)) |
| rndis_ipa_dump_skb(skb); |
| |
| if (unlikely(rndis_ipa_ctx->state != RNDIS_IPA_CONNECTED_AND_UP)) { |
| RNDIS_IPA_DEBUG("use connect()/up() before receive()\n"); |
| RNDIS_IPA_DEBUG("packet dropped (length=%d)\n", |
| skb->len); |
| return; |
| } |
| |
| if (evt != IPA_RECEIVE) { |
| RNDIS_IPA_ERROR("a none IPA_RECEIVE event in driver RX\n"); |
| return; |
| } |
| |
| if (!rndis_ipa_ctx->deaggregation_enable) |
| skb_pull(skb, sizeof(struct rndis_pkt_hdr)); |
| |
| skb->dev = rndis_ipa_ctx->net; |
| skb->protocol = eth_type_trans(skb, rndis_ipa_ctx->net); |
| |
| if (rx_filter(skb)) { |
| RNDIS_IPA_DEBUG("packet got filtered out on RX path\n"); |
| rndis_ipa_ctx->rx_dropped++; |
| dev_kfree_skb_any(skb); |
| return; |
| } |
| |
| trace_rndis_netif_ni(skb->protocol); |
| result = netif_rx_ni(skb); |
| if (result) |
| RNDIS_IPA_ERROR("fail on netif_rx_ni\n"); |
| rndis_ipa_ctx->net->stats.rx_packets++; |
| rndis_ipa_ctx->net->stats.rx_bytes += packet_len; |
| } |
| |
| /** rndis_ipa_stop() - notify the network interface to stop |
| * sending/receiving data |
| * @net: the network device being stopped. |
| * |
| * This API is used by Linux network stack to notify the network driver that |
| * its state was changed to "down" |
| * The driver will stop the "send" queue and change its internal |
| * state to "Connected". |
| * The Netdev shall be returned to be "Up" after rndis_ipa_open(). |
| */ |
| static int rndis_ipa_stop(struct net_device *net) |
| { |
| struct rndis_ipa_dev *rndis_ipa_ctx = netdev_priv(net); |
| int next_state; |
| unsigned long flags; |
| |
| RNDIS_IPA_LOG_ENTRY(); |
| |
| spin_lock_irqsave(&rndis_ipa_ctx->state_lock, flags); |
| |
| next_state = rndis_ipa_next_state(rndis_ipa_ctx->state, RNDIS_IPA_STOP); |
| if (next_state == RNDIS_IPA_INVALID) { |
| spin_unlock_irqrestore(&rndis_ipa_ctx->state_lock, flags); |
| RNDIS_IPA_DEBUG("can't do network interface down without up\n"); |
| return -EPERM; |
| } |
| |
| rndis_ipa_ctx->state = next_state; |
| |
| spin_unlock_irqrestore(&rndis_ipa_ctx->state_lock, flags); |
| |
| netif_stop_queue(net); |
| pr_info("RNDIS_IPA NetDev queue is stopped\n"); |
| |
| RNDIS_IPA_STATE_DEBUG(rndis_ipa_ctx); |
| |
| RNDIS_IPA_LOG_EXIT(); |
| |
| return 0; |
| } |
| |
| /** rndis_ipa_disconnect() - notify rndis_ipa Netdev that the USB pipes |
| * were disconnected |
| * @private: same value that was set by init(), this parameter holds the |
| * network device pointer. |
| * |
| * USB shall notify the Netdev after disconnecting the pipe. |
| * - The internal driver state shall returned to its previous |
| * state (Up or Initialized). |
| * - Linux network stack shall be informed for carrier off to notify |
| * user space for pipe disconnect |
| * - send queue shall be stopped |
| * During the transition between the pipe disconnection to |
| * the Netdev notification packets |
| * are expected to be dropped by IPA driver or IPA core. |
| */ |
| int rndis_ipa_pipe_disconnect_notify(void *private) |
| { |
| struct rndis_ipa_dev *rndis_ipa_ctx = private; |
| int next_state; |
| int outstanding_dropped_pkts; |
| int retval; |
| int ret; |
| unsigned long flags; |
| |
| RNDIS_IPA_LOG_ENTRY(); |
| |
| ret = 0; |
| NULL_CHECK_RETVAL(rndis_ipa_ctx); |
| if (ret) |
| return ret; |
| RNDIS_IPA_DEBUG("private=0x%p\n", private); |
| |
| spin_lock_irqsave(&rndis_ipa_ctx->state_lock, flags); |
| |
| next_state = rndis_ipa_next_state |
| (rndis_ipa_ctx->state, |
| RNDIS_IPA_DISCONNECT); |
| if (next_state == RNDIS_IPA_INVALID) { |
| spin_unlock_irqrestore(&rndis_ipa_ctx->state_lock, flags); |
| RNDIS_IPA_ERROR("can't disconnect before connect\n"); |
| return -EPERM; |
| } |
| spin_unlock_irqrestore(&rndis_ipa_ctx->state_lock, flags); |
| |
| if (rndis_ipa_ctx->during_xmit_error) { |
| RNDIS_IPA_DEBUG("canceling xmit-error delayed work\n"); |
| cancel_delayed_work_sync( |
| &rndis_ipa_ctx->xmit_error_delayed_work); |
| rndis_ipa_ctx->during_xmit_error = false; |
| } |
| |
| netif_carrier_off(rndis_ipa_ctx->net); |
| RNDIS_IPA_DEBUG("carrier_off notification was sent\n"); |
| |
| netif_stop_queue(rndis_ipa_ctx->net); |
| RNDIS_IPA_DEBUG("queue stopped\n"); |
| |
| outstanding_dropped_pkts = |
| atomic_read(&rndis_ipa_ctx->outstanding_pkts); |
| |
| rndis_ipa_ctx->net->stats.tx_dropped += outstanding_dropped_pkts; |
| atomic_set(&rndis_ipa_ctx->outstanding_pkts, 0); |
| |
| if (ipa_pm_is_used()) |
| retval = rndis_ipa_deregister_pm_client(rndis_ipa_ctx); |
| else |
| retval = rndis_ipa_destroy_rm_resource(rndis_ipa_ctx); |
| if (retval) { |
| RNDIS_IPA_ERROR("Fail to clean RM\n"); |
| return retval; |
| } |
| RNDIS_IPA_DEBUG("RM was successfully destroyed\n"); |
| |
| spin_lock_irqsave(&rndis_ipa_ctx->state_lock, flags); |
| next_state = rndis_ipa_next_state(rndis_ipa_ctx->state, |
| RNDIS_IPA_DISCONNECT); |
| if (next_state == RNDIS_IPA_INVALID) { |
| spin_unlock_irqrestore(&rndis_ipa_ctx->state_lock, flags); |
| RNDIS_IPA_ERROR("can't disconnect before connect\n"); |
| return -EPERM; |
| } |
| rndis_ipa_ctx->state = next_state; |
| spin_unlock_irqrestore(&rndis_ipa_ctx->state_lock, flags); |
| |
| RNDIS_IPA_STATE_DEBUG(rndis_ipa_ctx); |
| |
| pr_info("RNDIS_IPA NetDev pipes disconnected (%d outstanding clr)\n", |
| outstanding_dropped_pkts); |
| |
| RNDIS_IPA_LOG_EXIT(); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(rndis_ipa_pipe_disconnect_notify); |
| |
| /** |
| * rndis_ipa_cleanup() - unregister the network interface driver and free |
| * internal data structs. |
| * @private: same value that was set by init(), this |
| * parameter holds the network device pointer. |
| * |
| * This function shall be called once the network interface is not |
| * needed anymore, e.g: when the USB composition does not support it. |
| * This function shall be called after the pipes were disconnected. |
| * Detailed description: |
| * - remove header-insertion headers from IPA core |
| * - delete the driver dependency defined for IPA resource manager and |
| * destroy the producer resource. |
| * - remove the debugfs entries |
| * - deregister the network interface from Linux network stack |
| * - free all internal data structs |
| * |
| * It is assumed that no packets shall be sent through HW bridging |
| * during cleanup to avoid packets trying to add an header that is |
| * removed during cleanup (IPA configuration manager should have |
| * removed them at this point) |
| */ |
| void rndis_ipa_cleanup(void *private) |
| { |
| struct rndis_ipa_dev *rndis_ipa_ctx = private; |
| int next_state; |
| int retval; |
| unsigned long flags; |
| |
| RNDIS_IPA_LOG_ENTRY(); |
| |
| RNDIS_IPA_DEBUG("private=0x%p\n", private); |
| |
| if (!rndis_ipa_ctx) { |
| RNDIS_IPA_ERROR("rndis_ipa_ctx NULL pointer\n"); |
| return; |
| } |
| |
| spin_lock_irqsave(&rndis_ipa_ctx->state_lock, flags); |
| next_state = rndis_ipa_next_state |
| (rndis_ipa_ctx->state, |
| RNDIS_IPA_CLEANUP); |
| if (next_state == RNDIS_IPA_INVALID) { |
| spin_unlock_irqrestore(&rndis_ipa_ctx->state_lock, flags); |
| RNDIS_IPA_ERROR("use disconnect()before clean()\n"); |
| return; |
| } |
| spin_unlock_irqrestore(&rndis_ipa_ctx->state_lock, flags); |
| |
| RNDIS_IPA_STATE_DEBUG(rndis_ipa_ctx); |
| |
| retval = rndis_ipa_deregister_properties(rndis_ipa_ctx->net->name); |
| if (retval) { |
| RNDIS_IPA_ERROR("Fail to deregister Tx/Rx properties\n"); |
| return; |
| } |
| RNDIS_IPA_DEBUG("deregister Tx/Rx properties was successful\n"); |
| |
| retval = rndis_ipa_hdrs_destroy(rndis_ipa_ctx); |
| if (retval) |
| RNDIS_IPA_ERROR( |
| "Failed removing RNDIS headers from IPA core. Continue anyway\n"); |
| else |
| RNDIS_IPA_DEBUG("RNDIS headers were removed from IPA core\n"); |
| |
| rndis_ipa_debugfs_destroy(rndis_ipa_ctx); |
| RNDIS_IPA_DEBUG("debugfs remove was done\n"); |
| |
| unregister_netdev(rndis_ipa_ctx->net); |
| RNDIS_IPA_DEBUG("netdev unregistered\n"); |
| |
| spin_lock_irqsave(&rndis_ipa_ctx->state_lock, flags); |
| next_state = rndis_ipa_next_state(rndis_ipa_ctx->state, |
| RNDIS_IPA_CLEANUP); |
| if (next_state == RNDIS_IPA_INVALID) { |
| spin_unlock_irqrestore(&rndis_ipa_ctx->state_lock, flags); |
| RNDIS_IPA_ERROR("use disconnect()before clean()\n"); |
| return; |
| } |
| rndis_ipa_ctx->state = next_state; |
| spin_unlock_irqrestore(&rndis_ipa_ctx->state_lock, flags); |
| free_netdev(rndis_ipa_ctx->net); |
| pr_info("RNDIS_IPA NetDev was cleaned\n"); |
| |
| RNDIS_IPA_LOG_EXIT(); |
| } |
| EXPORT_SYMBOL(rndis_ipa_cleanup); |
| |
| static void rndis_ipa_enable_data_path(struct rndis_ipa_dev *rndis_ipa_ctx) |
| { |
| if (rndis_ipa_ctx->device_ready_notify) { |
| rndis_ipa_ctx->device_ready_notify(); |
| RNDIS_IPA_DEBUG("USB device_ready_notify() was called\n"); |
| } else { |
| RNDIS_IPA_DEBUG("device_ready_notify() not supplied\n"); |
| } |
| |
| netif_start_queue(rndis_ipa_ctx->net); |
| RNDIS_IPA_DEBUG("netif_start_queue() was called\n"); |
| } |
| |
| static void rndis_ipa_xmit_error(struct sk_buff *skb) |
| { |
| bool retval; |
| struct rndis_ipa_dev *rndis_ipa_ctx = netdev_priv(skb->dev); |
| unsigned long delay_jiffies; |
| u8 rand_dealy_msec; |
| |
| RNDIS_IPA_LOG_ENTRY(); |
| |
| RNDIS_IPA_DEBUG("starting Tx-queue backoff\n"); |
| |
| netif_stop_queue(rndis_ipa_ctx->net); |
| RNDIS_IPA_DEBUG("netif_stop_queue was called\n"); |
| |
| skb_pull(skb, sizeof(rndis_template_hdr)); |
| rndis_ipa_ctx->net->stats.tx_errors++; |
| |
| get_random_bytes(&rand_dealy_msec, sizeof(rand_dealy_msec)); |
| delay_jiffies = msecs_to_jiffies( |
| rndis_ipa_ctx->error_msec_sleep_time + rand_dealy_msec); |
| |
| retval = schedule_delayed_work( |
| &rndis_ipa_ctx->xmit_error_delayed_work, delay_jiffies); |
| if (!retval) { |
| RNDIS_IPA_ERROR("fail to schedule delayed work\n"); |
| netif_start_queue(rndis_ipa_ctx->net); |
| } else { |
| RNDIS_IPA_DEBUG |
| ("work scheduled to start Tx-queue in %d msec\n", |
| rndis_ipa_ctx->error_msec_sleep_time + |
| rand_dealy_msec); |
| rndis_ipa_ctx->during_xmit_error = true; |
| } |
| |
| RNDIS_IPA_LOG_EXIT(); |
| } |
| |
| static void rndis_ipa_xmit_error_aftercare_wq(struct work_struct *work) |
| { |
| struct rndis_ipa_dev *rndis_ipa_ctx; |
| struct delayed_work *delayed_work; |
| |
| RNDIS_IPA_LOG_ENTRY(); |
| |
| RNDIS_IPA_DEBUG("Starting queue after xmit error\n"); |
| |
| delayed_work = to_delayed_work(work); |
| rndis_ipa_ctx = container_of |
| (delayed_work, struct rndis_ipa_dev, |
| xmit_error_delayed_work); |
| |
| if (unlikely(rndis_ipa_ctx->state != RNDIS_IPA_CONNECTED_AND_UP)) { |
| RNDIS_IPA_ERROR |
| ("error aftercare handling in bad state (%d)", |
| rndis_ipa_ctx->state); |
| return; |
| } |
| |
| rndis_ipa_ctx->during_xmit_error = false; |
| |
| netif_start_queue(rndis_ipa_ctx->net); |
| RNDIS_IPA_DEBUG("netif_start_queue() was called\n"); |
| |
| RNDIS_IPA_LOG_EXIT(); |
| } |
| |
| /** |
| * rndis_ipa_prepare_header_insertion() - prepare the header insertion request |
| * for IPA driver |
| * eth_type: the Ethernet type for this header-insertion header |
| * hdr_name: string that shall represent this header in IPA data base |
| * add_hdr: output for caller to be used with ipa_add_hdr() to configure |
| * the IPA core |
| * dst_mac: tethered PC MAC (Ethernet) address to be added to packets |
| * for IPA->USB pipe |
| * src_mac: device MAC (Ethernet) address to be added to packets |
| * for IPA->USB pipe |
| * |
| * This function shall build the header-insertion block request for a |
| * single Ethernet+RNDIS header) |
| * this header shall be inserted for packets processed by IPA |
| * and destined for USB client. |
| * This header shall be used for HW bridging for packets destined for |
| * tethered PC. |
| * For SW data-path, this header won't be used. |
| */ |
| static void rndis_ipa_prepare_header_insertion( |
| int eth_type, |
| const char *hdr_name, struct ipa_hdr_add *add_hdr, |
| const void *dst_mac, const void *src_mac) |
| { |
| struct ethhdr *eth_hdr; |
| |
| add_hdr->hdr_len = sizeof(rndis_template_hdr); |
| add_hdr->is_partial = false; |
| strlcpy(add_hdr->name, hdr_name, IPA_RESOURCE_NAME_MAX); |
| |
| memcpy(add_hdr->hdr, &rndis_template_hdr, sizeof(rndis_template_hdr)); |
| eth_hdr = (struct ethhdr *)(add_hdr->hdr + sizeof(rndis_template_hdr)); |
| memcpy(eth_hdr->h_dest, dst_mac, ETH_ALEN); |
| memcpy(eth_hdr->h_source, src_mac, ETH_ALEN); |
| eth_hdr->h_proto = htons(eth_type); |
| add_hdr->hdr_len += ETH_HLEN; |
| add_hdr->is_eth2_ofst_valid = true; |
| add_hdr->eth2_ofst = sizeof(rndis_template_hdr); |
| add_hdr->type = IPA_HDR_L2_ETHERNET_II; |
| } |
| |
| /** |
| * rndis_ipa_hdrs_cfg() - configure header insertion block in IPA core |
| * to allow HW bridging |
| * @rndis_ipa_ctx: main driver context |
| * @dst_mac: destination MAC address (tethered PC) |
| * @src_mac: source MAC address (MDM device) |
| * |
| * This function shall add 2 headers. |
| * One header for Ipv4 and one header for Ipv6. |
| * Both headers shall contain Ethernet header and RNDIS header, the only |
| * difference shall be in the EtherTye field. |
| * Headers will be committed to HW |
| * |
| * Returns negative errno, or zero on success |
| */ |
| static int rndis_ipa_hdrs_cfg( |
| struct rndis_ipa_dev *rndis_ipa_ctx, |
| const void *dst_mac, const void *src_mac) |
| { |
| struct ipa_ioc_add_hdr *hdrs; |
| struct ipa_hdr_add *ipv4_hdr; |
| struct ipa_hdr_add *ipv6_hdr; |
| int result = 0; |
| |
| RNDIS_IPA_LOG_ENTRY(); |
| |
| hdrs = kzalloc |
| (sizeof(*hdrs) + sizeof(*ipv4_hdr) + sizeof(*ipv6_hdr), |
| GFP_KERNEL); |
| if (!hdrs) { |
| RNDIS_IPA_ERROR("mem allocation fail for header-insertion\n"); |
| result = -ENOMEM; |
| goto fail_mem; |
| } |
| |
| ipv4_hdr = &hdrs->hdr[0]; |
| ipv6_hdr = &hdrs->hdr[1]; |
| rndis_ipa_prepare_header_insertion |
| (ETH_P_IP, IPV4_HDR_NAME, |
| ipv4_hdr, dst_mac, src_mac); |
| rndis_ipa_prepare_header_insertion |
| (ETH_P_IPV6, IPV6_HDR_NAME, |
| ipv6_hdr, dst_mac, src_mac); |
| |
| hdrs->commit = 1; |
| hdrs->num_hdrs = 2; |
| result = ipa_add_hdr(hdrs); |
| if (result) { |
| RNDIS_IPA_ERROR("Fail on Header-Insertion(%d)\n", result); |
| goto fail_add_hdr; |
| } |
| if (ipv4_hdr->status) { |
| RNDIS_IPA_ERROR("Fail on Header-Insertion ipv4(%d)\n", |
| ipv4_hdr->status); |
| result = ipv4_hdr->status; |
| goto fail_add_hdr; |
| } |
| if (ipv6_hdr->status) { |
| RNDIS_IPA_ERROR("Fail on Header-Insertion ipv6(%d)\n", |
| ipv6_hdr->status); |
| result = ipv6_hdr->status; |
| goto fail_add_hdr; |
| } |
| rndis_ipa_ctx->eth_ipv4_hdr_hdl = ipv4_hdr->hdr_hdl; |
| rndis_ipa_ctx->eth_ipv6_hdr_hdl = ipv6_hdr->hdr_hdl; |
| |
| RNDIS_IPA_LOG_EXIT(); |
| |
| fail_add_hdr: |
| kfree(hdrs); |
| fail_mem: |
| return result; |
| } |
| |
| /** |
| * rndis_ipa_hdrs_destroy() - remove the IPA core configuration done for |
| * the driver data path bridging. |
| * @rndis_ipa_ctx: the driver context |
| * |
| * Revert the work done on rndis_ipa_hdrs_cfg(), which is, |
| * remove 2 headers for Ethernet+RNDIS. |
| */ |
| static int rndis_ipa_hdrs_destroy(struct rndis_ipa_dev *rndis_ipa_ctx) |
| { |
| struct ipa_ioc_del_hdr *del_hdr; |
| struct ipa_hdr_del *ipv4; |
| struct ipa_hdr_del *ipv6; |
| int result; |
| |
| del_hdr = kzalloc(sizeof(*del_hdr) + sizeof(*ipv4) + |
| sizeof(*ipv6), GFP_KERNEL); |
| if (!del_hdr) { |
| RNDIS_IPA_ERROR("memory allocation for del_hdr failed\n"); |
| return -ENOMEM; |
| } |
| |
| del_hdr->commit = 1; |
| del_hdr->num_hdls = 2; |
| |
| ipv4 = &del_hdr->hdl[0]; |
| ipv4->hdl = rndis_ipa_ctx->eth_ipv4_hdr_hdl; |
| ipv6 = &del_hdr->hdl[1]; |
| ipv6->hdl = rndis_ipa_ctx->eth_ipv6_hdr_hdl; |
| |
| result = ipa_del_hdr(del_hdr); |
| if (result || ipv4->status || ipv6->status) |
| RNDIS_IPA_ERROR("ipa_del_hdr failed\n"); |
| else |
| RNDIS_IPA_DEBUG("hdrs deletion done\n"); |
| |
| kfree(del_hdr); |
| return result; |
| } |
| |
| static struct net_device_stats *rndis_ipa_get_stats(struct net_device *net) |
| { |
| return &net->stats; |
| } |
| |
| /** |
| * rndis_ipa_register_properties() - set Tx/Rx properties needed |
| * by IPA configuration manager |
| * @netdev_name: a string with the name of the network interface device |
| * |
| * Register Tx/Rx properties to allow user space configuration (IPA |
| * Configuration Manager): |
| * |
| * - Two Tx properties (IPA->USB): specify the header names and pipe number |
| * that shall be used by user space for header-addition configuration |
| * for ipv4/ipv6 packets flowing from IPA to USB for HW bridging data. |
| * That header-addition header is added by the Netdev and used by user |
| * space to close the the HW bridge by adding filtering and routing rules |
| * that point to this header. |
| * |
| * - Two Rx properties (USB->IPA): these properties shall be used by user space |
| * to configure the IPA core to identify the packets destined |
| * for Apps-processor by configuring the unicast rules destined for |
| * the Netdev IP address. |
| * This rules shall be added based on the attribute mask supplied at |
| * this function, that is, always hit rule. |
| */ |
| static int rndis_ipa_register_properties(char *netdev_name) |
| { |
| struct ipa_tx_intf tx_properties = {0}; |
| struct ipa_ioc_tx_intf_prop properties[2] = { {0}, {0} }; |
| struct ipa_ioc_tx_intf_prop *ipv4_property; |
| struct ipa_ioc_tx_intf_prop *ipv6_property; |
| struct ipa_ioc_rx_intf_prop rx_ioc_properties[2] = { {0}, {0} }; |
| struct ipa_rx_intf rx_properties = {0}; |
| struct ipa_ioc_rx_intf_prop *rx_ipv4_property; |
| struct ipa_ioc_rx_intf_prop *rx_ipv6_property; |
| int result = 0; |
| |
| RNDIS_IPA_LOG_ENTRY(); |
| |
| tx_properties.prop = properties; |
| ipv4_property = &tx_properties.prop[0]; |
| ipv4_property->ip = IPA_IP_v4; |
| ipv4_property->dst_pipe = IPA_TO_USB_CLIENT; |
| strlcpy |
| (ipv4_property->hdr_name, IPV4_HDR_NAME, |
| IPA_RESOURCE_NAME_MAX); |
| ipv4_property->hdr_l2_type = IPA_HDR_L2_ETHERNET_II; |
| ipv6_property = &tx_properties.prop[1]; |
| ipv6_property->ip = IPA_IP_v6; |
| ipv6_property->dst_pipe = IPA_TO_USB_CLIENT; |
| strlcpy |
| (ipv6_property->hdr_name, IPV6_HDR_NAME, |
| IPA_RESOURCE_NAME_MAX); |
| ipv6_property->hdr_l2_type = IPA_HDR_L2_ETHERNET_II; |
| tx_properties.num_props = 2; |
| |
| rx_properties.prop = rx_ioc_properties; |
| rx_ipv4_property = &rx_properties.prop[0]; |
| rx_ipv4_property->ip = IPA_IP_v4; |
| rx_ipv4_property->attrib.attrib_mask = 0; |
| rx_ipv4_property->src_pipe = IPA_CLIENT_USB_PROD; |
| rx_ipv4_property->hdr_l2_type = IPA_HDR_L2_ETHERNET_II; |
| rx_ipv6_property = &rx_properties.prop[1]; |
| rx_ipv6_property->ip = IPA_IP_v6; |
| rx_ipv6_property->attrib.attrib_mask = 0; |
| rx_ipv6_property->src_pipe = IPA_CLIENT_USB_PROD; |
| rx_ipv6_property->hdr_l2_type = IPA_HDR_L2_ETHERNET_II; |
| rx_properties.num_props = 2; |
| |
| result = ipa_register_intf("rndis0", &tx_properties, &rx_properties); |
| if (result) |
| RNDIS_IPA_ERROR("fail on Tx/Rx properties registration\n"); |
| else |
| RNDIS_IPA_DEBUG("Tx/Rx properties registration done\n"); |
| |
| RNDIS_IPA_LOG_EXIT(); |
| |
| return result; |
| } |
| |
| /** |
| * rndis_ipa_deregister_properties() - remove the 2 Tx and 2 Rx properties |
| * @netdev_name: a string with the name of the network interface device |
| * |
| * This function revert the work done on rndis_ipa_register_properties(). |
| */ |
| static int rndis_ipa_deregister_properties(char *netdev_name) |
| { |
| int result; |
| |
| RNDIS_IPA_LOG_ENTRY(); |
| |
| result = ipa_deregister_intf(netdev_name); |
| if (result) { |
| RNDIS_IPA_DEBUG("Fail on Tx prop deregister\n"); |
| return result; |
| } |
| RNDIS_IPA_LOG_EXIT(); |
| |
| return 0; |
| } |
| |
| /** |
| * rndis_ipa_create_rm_resource() -creates the resource representing |
| * this Netdev and supply notification callback for resource event |
| * such as Grant/Release |
| * @rndis_ipa_ctx: this driver context |
| * |
| * In order make sure all needed resources are available during packet |
| * transmit this Netdev shall use Request/Release mechanism of |
| * the IPA resource manager. |
| * This mechanism shall iterate over a dependency graph and make sure |
| * all dependent entities are ready to for packet Tx |
| * transfer (Apps->IPA->USB). |
| * In this function the resource representing the Netdev is created |
| * in addition to the basic dependency between the Netdev and the USB client. |
| * Hence, USB client, is a dependency for the Netdev and may be notified in |
| * case of packet transmit from this Netdev to tethered Host. |
| * As implied from the "may" in the above sentence there is a scenario where |
| * the USB is not notified. This is done thanks to the IPA resource manager |
| * inactivity timer. |
| * The inactivity timer allow the Release requests to be delayed in order |
| * prevent ping-pong with the USB and other dependencies. |
| */ |
| static int rndis_ipa_create_rm_resource(struct rndis_ipa_dev *rndis_ipa_ctx) |
| { |
| struct ipa_rm_create_params create_params = {0}; |
| struct ipa_rm_perf_profile profile; |
| int result; |
| |
| RNDIS_IPA_LOG_ENTRY(); |
| |
| create_params.name = DRV_RESOURCE_ID; |
| create_params.reg_params.user_data = rndis_ipa_ctx; |
| create_params.reg_params.notify_cb = rndis_ipa_rm_notify; |
| result = ipa_rm_create_resource(&create_params); |
| if (result) { |
| RNDIS_IPA_ERROR("Fail on ipa_rm_create_resource\n"); |
| goto fail_rm_create; |
| } |
| RNDIS_IPA_DEBUG("RM client was created\n"); |
| |
| profile.max_supported_bandwidth_mbps = IPA_APPS_MAX_BW_IN_MBPS; |
| ipa_rm_set_perf_profile(DRV_RESOURCE_ID, &profile); |
| |
| result = ipa_rm_inactivity_timer_init |
| (DRV_RESOURCE_ID, |
| INACTIVITY_MSEC_DELAY); |
| if (result) { |
| RNDIS_IPA_ERROR("Fail on ipa_rm_inactivity_timer_init\n"); |
| goto fail_inactivity_timer; |
| } |
| |
| RNDIS_IPA_DEBUG("rm_it client was created\n"); |
| |
| result = ipa_rm_add_dependency_sync |
| (DRV_RESOURCE_ID, |
| IPA_RM_RESOURCE_USB_CONS); |
| |
| if (result && result != -EINPROGRESS) |
| RNDIS_IPA_ERROR("unable to add RNDIS/USB dependency (%d)\n", |
| result); |
| else |
| RNDIS_IPA_DEBUG("RNDIS/USB dependency was set\n"); |
| |
| result = ipa_rm_add_dependency_sync |
| (IPA_RM_RESOURCE_USB_PROD, |
| IPA_RM_RESOURCE_APPS_CONS); |
| if (result && result != -EINPROGRESS) |
| RNDIS_IPA_ERROR("unable to add USB/APPS dependency (%d)\n", |
| result); |
| else |
| RNDIS_IPA_DEBUG("USB/APPS dependency was set\n"); |
| |
| RNDIS_IPA_LOG_EXIT(); |
| |
| return 0; |
| |
| fail_inactivity_timer: |
| fail_rm_create: |
| return result; |
| } |
| |
| static void rndis_ipa_pm_cb(void *p, enum ipa_pm_cb_event event) |
| { |
| struct rndis_ipa_dev *rndis_ipa_ctx = p; |
| |
| RNDIS_IPA_LOG_ENTRY(); |
| |
| if (event != IPA_PM_CLIENT_ACTIVATED) { |
| RNDIS_IPA_ERROR("unexpected event %d\n", event); |
| WARN_ON(1); |
| return; |
| } |
| RNDIS_IPA_DEBUG("Resource Granted\n"); |
| |
| if (netif_queue_stopped(rndis_ipa_ctx->net)) { |
| RNDIS_IPA_DEBUG("starting queue\n"); |
| netif_start_queue(rndis_ipa_ctx->net); |
| } else { |
| RNDIS_IPA_DEBUG("queue already awake\n"); |
| } |
| |
| RNDIS_IPA_LOG_EXIT(); |
| } |
| |
| /** |
| * rndis_ipa_destroy_rm_resource() - delete the dependency and destroy |
| * the resource done on rndis_ipa_create_rm_resource() |
| * @rndis_ipa_ctx: this driver context |
| * |
| * This function shall delete the dependency create between |
| * the Netdev to the USB. |
| * In addition the inactivity time shall be destroy and the resource shall |
| * be deleted. |
| */ |
| static int rndis_ipa_destroy_rm_resource(struct rndis_ipa_dev *rndis_ipa_ctx) |
| { |
| int result; |
| |
| RNDIS_IPA_LOG_ENTRY(); |
| |
| result = ipa_rm_delete_dependency |
| (DRV_RESOURCE_ID, |
| IPA_RM_RESOURCE_USB_CONS); |
| if (result && result != -EINPROGRESS) { |
| RNDIS_IPA_ERROR("Fail to delete RNDIS/USB dependency\n"); |
| goto bail; |
| } |
| RNDIS_IPA_DEBUG("RNDIS/USB dependency was successfully deleted\n"); |
| |
| result = ipa_rm_delete_dependency |
| (IPA_RM_RESOURCE_USB_PROD, |
| IPA_RM_RESOURCE_APPS_CONS); |
| if (result == -EINPROGRESS) { |
| RNDIS_IPA_DEBUG("RM dependency deletion is in progress"); |
| } else if (result) { |
| RNDIS_IPA_ERROR("Fail to delete USB/APPS dependency\n"); |
| goto bail; |
| } else { |
| RNDIS_IPA_DEBUG("USB/APPS dependency was deleted\n"); |
| } |
| |
| result = ipa_rm_inactivity_timer_destroy(DRV_RESOURCE_ID); |
| if (result) { |
| RNDIS_IPA_ERROR("Fail to destroy inactivity timern"); |
| goto bail; |
| } |
| RNDIS_IPA_DEBUG("RM inactivity timer was successfully destroy\n"); |
| |
| result = ipa_rm_delete_resource(DRV_RESOURCE_ID); |
| if (result) { |
| RNDIS_IPA_ERROR("resource deletion failed\n"); |
| goto bail; |
| } |
| RNDIS_IPA_DEBUG |
| ("Netdev RM resource was deleted (resid:%d)\n", |
| DRV_RESOURCE_ID); |
| |
| RNDIS_IPA_LOG_EXIT(); |
| |
| bail: |
| return result; |
| } |
| |
| static int rndis_ipa_register_pm_client(struct rndis_ipa_dev *rndis_ipa_ctx) |
| { |
| int result; |
| struct ipa_pm_register_params pm_reg; |
| |
| memset(&pm_reg, 0, sizeof(pm_reg)); |
| |
| pm_reg.name = rndis_ipa_ctx->net->name; |
| pm_reg.user_data = rndis_ipa_ctx; |
| pm_reg.callback = rndis_ipa_pm_cb; |
| pm_reg.group = IPA_PM_GROUP_APPS; |
| result = ipa_pm_register(&pm_reg, &rndis_ipa_ctx->pm_hdl); |
| if (result) { |
| RNDIS_IPA_ERROR("failed to create IPA PM client %d\n", result); |
| return result; |
| } |
| return 0; |
| } |
| |
| static int rndis_ipa_deregister_pm_client(struct rndis_ipa_dev *rndis_ipa_ctx) |
| { |
| ipa_pm_deactivate_sync(rndis_ipa_ctx->pm_hdl); |
| ipa_pm_deregister(rndis_ipa_ctx->pm_hdl); |
| rndis_ipa_ctx->pm_hdl = ~0; |
| return 0; |
| } |
| |
| /** |
| * resource_request() - request for the Netdev resource |
| * @rndis_ipa_ctx: main driver context |
| * |
| * This function shall send the IPA resource manager inactivity time a request |
| * to Grant the Netdev producer. |
| * In case the resource is already Granted the function shall return immediately |
| * and "pet" the inactivity timer. |
| * In case the resource was not already Granted this function shall |
| * return EINPROGRESS and the Netdev shall stop the send queue until |
| * the IPA resource manager notify it that the resource is |
| * granted (done in a differ context) |
| */ |
| static int resource_request(struct rndis_ipa_dev *rndis_ipa_ctx) |
| { |
| int result = 0; |
| |
| if (!rm_enabled(rndis_ipa_ctx)) |
| return result; |
| |
| if (ipa_pm_is_used()) |
| return ipa_pm_activate(rndis_ipa_ctx->pm_hdl); |
| |
| return ipa_rm_inactivity_timer_request_resource( |
| DRV_RESOURCE_ID); |
| |
| } |
| |
| /** |
| * resource_release() - release the Netdev resource |
| * @rndis_ipa_ctx: main driver context |
| * |
| * start the inactivity timer count down.by using the IPA resource |
| * manager inactivity time. |
| * The actual resource release shall occur only if no request shall be done |
| * during the INACTIVITY_MSEC_DELAY. |
| */ |
| static void resource_release(struct rndis_ipa_dev *rndis_ipa_ctx) |
| { |
| if (!rm_enabled(rndis_ipa_ctx)) |
| return; |
| if (ipa_pm_is_used()) |
| ipa_pm_deferred_deactivate(rndis_ipa_ctx->pm_hdl); |
| else |
| ipa_rm_inactivity_timer_release_resource(DRV_RESOURCE_ID); |
| |
| return; |
| } |
| |
| /** |
| * rndis_encapsulate_skb() - encapsulate the given Ethernet skb with |
| * an RNDIS header |
| * @skb: packet to be encapsulated with the RNDIS header |
| * |
| * Shall use a template header for RNDIS and update it with the given |
| * skb values. |
| * Ethernet is expected to be already encapsulate the packet. |
| */ |
| static struct sk_buff *rndis_encapsulate_skb(struct sk_buff *skb) |
| { |
| struct rndis_pkt_hdr *rndis_hdr; |
| int payload_byte_len = skb->len; |
| |
| /* if there is no room in this skb, allocate a new one */ |
| if (unlikely(skb_headroom(skb) < sizeof(rndis_template_hdr))) { |
| struct sk_buff *new_skb = skb_copy_expand(skb, |
| sizeof(rndis_template_hdr), 0, GFP_ATOMIC); |
| if (!new_skb) { |
| RNDIS_IPA_ERROR("no memory for skb expand\n"); |
| return skb; |
| } |
| RNDIS_IPA_DEBUG("skb expanded. old %p new %p\n", skb, new_skb); |
| dev_kfree_skb_any(skb); |
| skb = new_skb; |
| } |
| |
| /* make room at the head of the SKB to put the RNDIS header */ |
| rndis_hdr = (struct rndis_pkt_hdr *)skb_push(skb, |
| sizeof(rndis_template_hdr)); |
| |
| memcpy(rndis_hdr, &rndis_template_hdr, sizeof(*rndis_hdr)); |
| rndis_hdr->msg_len += payload_byte_len; |
| rndis_hdr->data_len += payload_byte_len; |
| |
| return skb; |
| } |
| |
| /** |
| * rx_filter() - logic that decide if the current skb is to be filtered out |
| * @skb: skb that may be sent up to the network stack |
| * |
| * This function shall do Rx packet filtering on the Netdev level. |
| */ |
| static bool rx_filter(struct sk_buff *skb) |
| { |
| struct rndis_ipa_dev *rndis_ipa_ctx = netdev_priv(skb->dev); |
| |
| return rndis_ipa_ctx->rx_filter; |
| } |
| |
| /** |
| * tx_filter() - logic that decide if the current skb is to be filtered out |
| * @skb: skb that may be sent to the USB core |
| * |
| * This function shall do Tx packet filtering on the Netdev level. |
| * ICMP filter bypass is possible to allow only ICMP packet to be |
| * sent (pings and etc) |
| */ |
| |
| static bool tx_filter(struct sk_buff *skb) |
| { |
| struct rndis_ipa_dev *rndis_ipa_ctx = netdev_priv(skb->dev); |
| bool is_icmp; |
| |
| if (likely(!rndis_ipa_ctx->tx_filter)) |
| return false; |
| |
| is_icmp = (skb->protocol == htons(ETH_P_IP) && |
| ip_hdr(skb)->protocol == IPPROTO_ICMP); |
| |
| if ((!rndis_ipa_ctx->icmp_filter) && is_icmp) |
| return false; |
| |
| return true; |
| } |
| |
| /** |
| * rm_enabled() - allow the use of resource manager Request/Release to |
| * be bypassed |
| * @rndis_ipa_ctx: main driver context |
| * |
| * By disabling the resource manager flag the Request for the Netdev resource |
| * shall be bypassed and the packet shall be sent. |
| * accordingly, Release request shall be bypass as well. |
| */ |
| static bool rm_enabled(struct rndis_ipa_dev *rndis_ipa_ctx) |
| { |
| return rndis_ipa_ctx->rm_enable; |
| } |
| |
| /** |
| * rndis_ipa_ep_registers_cfg() - configure the USB endpoints |
| * @usb_to_ipa_hdl: handle received from ipa_connect which represents |
| * the USB to IPA end-point |
| * @ipa_to_usb_hdl: handle received from ipa_connect which represents |
| * the IPA to USB end-point |
| * @max_xfer_size_bytes_to_dev: the maximum size, in bytes, that the device |
| * expects to receive from the host. supplied on REMOTE_NDIS_INITIALIZE_CMPLT. |
| * @max_xfer_size_bytes_to_host: the maximum size, in bytes, that the host |
| * expects to receive from the device. supplied on REMOTE_NDIS_INITIALIZE_MSG. |
| * @mtu: the netdev MTU size, in bytes |
| * |
| * USB to IPA pipe: |
| * - de-aggregation |
| * - Remove Ethernet header |
| * - Remove RNDIS header |
| * - SRC NAT |
| * - Default routing(0) |
| * IPA to USB Pipe: |
| * - aggregation |
| * - Add Ethernet header |
| * - Add RNDIS header |
| */ |
| static int rndis_ipa_ep_registers_cfg( |
| u32 usb_to_ipa_hdl, |
| u32 ipa_to_usb_hdl, |
| u32 max_xfer_size_bytes_to_dev, |
| u32 max_xfer_size_bytes_to_host, |
| u32 mtu, |
| bool deaggr_enable) |
| { |
| int result; |
| struct ipa_ep_cfg *usb_to_ipa_ep_cfg; |
| |
| if (deaggr_enable) { |
| usb_to_ipa_ep_cfg = &usb_to_ipa_ep_cfg_deaggr_en; |
| RNDIS_IPA_DEBUG("deaggregation enabled\n"); |
| } else { |
| usb_to_ipa_ep_cfg = &usb_to_ipa_ep_cfg_deaggr_dis; |
| RNDIS_IPA_DEBUG("deaggregation disabled\n"); |
| } |
| |
| usb_to_ipa_ep_cfg->deaggr.max_packet_len = max_xfer_size_bytes_to_dev; |
| result = ipa_cfg_ep(usb_to_ipa_hdl, usb_to_ipa_ep_cfg); |
| if (result) { |
| pr_err("failed to configure USB to IPA point\n"); |
| return result; |
| } |
| RNDIS_IPA_DEBUG("IPA<-USB end-point configured\n"); |
| |
| ipa_to_usb_ep_cfg.aggr.aggr_byte_limit = |
| (max_xfer_size_bytes_to_host - mtu) / 1024; |
| |
| if (ipa_to_usb_ep_cfg.aggr.aggr_byte_limit == 0) { |
| ipa_to_usb_ep_cfg.aggr.aggr_time_limit = 0; |
| ipa_to_usb_ep_cfg.aggr.aggr_pkt_limit = 1; |
| } else { |
| ipa_to_usb_ep_cfg.aggr.aggr_time_limit = |
| DEFAULT_AGGR_TIME_LIMIT; |
| ipa_to_usb_ep_cfg.aggr.aggr_pkt_limit = |
| DEFAULT_AGGR_PKT_LIMIT; |
| } |
| |
| RNDIS_IPA_DEBUG( |
| "RNDIS aggregation param: en=%d byte_limit=%d time_limit=%d pkt_limit=%d\n" |
| , ipa_to_usb_ep_cfg.aggr.aggr_en, |
| ipa_to_usb_ep_cfg.aggr.aggr_byte_limit, |
| ipa_to_usb_ep_cfg.aggr.aggr_time_limit, |
| ipa_to_usb_ep_cfg.aggr.aggr_pkt_limit); |
| |
| result = ipa_cfg_ep(ipa_to_usb_hdl, &ipa_to_usb_ep_cfg); |
| if (result) { |
| pr_err("failed to configure IPA to USB end-point\n"); |
| return result; |
| } |
| RNDIS_IPA_DEBUG("IPA->USB end-point configured\n"); |
| |
| return 0; |
| } |
| |
| /** |
| * rndis_ipa_set_device_ethernet_addr() - set device Ethernet address |
| * @dev_ethaddr: device Ethernet address |
| * |
| * Returns 0 for success, negative otherwise |
| */ |
| static int rndis_ipa_set_device_ethernet_addr( |
| u8 *dev_ethaddr, |
| u8 device_ethaddr[]) |
| { |
| if (!is_valid_ether_addr(device_ethaddr)) |
| return -EINVAL; |
| memcpy(dev_ethaddr, device_ethaddr, ETH_ALEN); |
| |
| return 0; |
| } |
| |
| /** rndis_ipa_next_state - return the next state of the driver |
| * @current_state: the current state of the driver |
| * @operation: an enum which represent the operation being made on the driver |
| * by its API. |
| * |
| * This function implements the driver internal state machine. |
| * Its decisions are based on the driver current state and the operation |
| * being made. |
| * In case the operation is invalid this state machine will return |
| * the value RNDIS_IPA_INVALID to inform the caller for a forbidden sequence. |
| */ |
| static enum rndis_ipa_state rndis_ipa_next_state( |
| enum rndis_ipa_state current_state, |
| enum rndis_ipa_operation operation) |
| { |
| int next_state = RNDIS_IPA_INVALID; |
| |
| switch (current_state) { |
| case RNDIS_IPA_UNLOADED: |
| if (operation == RNDIS_IPA_INITIALIZE) |
| next_state = RNDIS_IPA_INITIALIZED; |
| break; |
| case RNDIS_IPA_INITIALIZED: |
| if (operation == RNDIS_IPA_CONNECT) |
| next_state = RNDIS_IPA_CONNECTED; |
| else if (operation == RNDIS_IPA_OPEN) |
| next_state = RNDIS_IPA_UP; |
| else if (operation == RNDIS_IPA_CLEANUP) |
| next_state = RNDIS_IPA_UNLOADED; |
| break; |
| case RNDIS_IPA_CONNECTED: |
| if (operation == RNDIS_IPA_DISCONNECT) |
| next_state = RNDIS_IPA_INITIALIZED; |
| else if (operation == RNDIS_IPA_OPEN) |
| next_state = RNDIS_IPA_CONNECTED_AND_UP; |
| break; |
| case RNDIS_IPA_UP: |
| if (operation == RNDIS_IPA_STOP) |
| next_state = RNDIS_IPA_INITIALIZED; |
| else if (operation == RNDIS_IPA_CONNECT) |
| next_state = RNDIS_IPA_CONNECTED_AND_UP; |
| else if (operation == RNDIS_IPA_CLEANUP) |
| next_state = RNDIS_IPA_UNLOADED; |
| break; |
| case RNDIS_IPA_CONNECTED_AND_UP: |
| if (operation == RNDIS_IPA_STOP) |
| next_state = RNDIS_IPA_CONNECTED; |
| else if (operation == RNDIS_IPA_DISCONNECT) |
| next_state = RNDIS_IPA_UP; |
| break; |
| default: |
| RNDIS_IPA_ERROR("State is not supported\n"); |
| WARN_ON(true); |
| break; |
| } |
| |
| RNDIS_IPA_DEBUG |
| ("state transition ( %s -> %s )- %s\n", |
| rndis_ipa_state_string(current_state), |
| rndis_ipa_state_string(next_state), |
| next_state == RNDIS_IPA_INVALID ? |
| "Forbidden" : "Allowed"); |
| |
| return next_state; |
| } |
| |
| /** |
| * rndis_ipa_state_string - return the state string representation |
| * @state: enum which describe the state |
| */ |
| static const char *rndis_ipa_state_string(enum rndis_ipa_state state) |
| { |
| switch (state) { |
| case RNDIS_IPA_UNLOADED: |
| return "RNDIS_IPA_UNLOADED"; |
| case RNDIS_IPA_INITIALIZED: |
| return "RNDIS_IPA_INITIALIZED"; |
| case RNDIS_IPA_CONNECTED: |
| return "RNDIS_IPA_CONNECTED"; |
| case RNDIS_IPA_UP: |
| return "RNDIS_IPA_UP"; |
| case RNDIS_IPA_CONNECTED_AND_UP: |
| return "RNDIS_IPA_CONNECTED_AND_UP"; |
| default: |
| return "Not supported"; |
| } |
| } |
| |
| static void rndis_ipa_dump_skb(struct sk_buff *skb) |
| { |
| int i; |
| u32 *cur = (u32 *)skb->data; |
| u8 *byte; |
| |
| RNDIS_IPA_DEBUG |
| ("packet dump start for skb->len=%d\n", |
| skb->len); |
| |
| for (i = 0; i < (skb->len / 4); i++) { |
| byte = (u8 *)(cur + i); |
| pr_info |
| ("%2d %08x %02x %02x %02x %02x\n", |
| i, *(cur + i), |
| byte[0], byte[1], byte[2], byte[3]); |
| } |
| RNDIS_IPA_DEBUG |
| ("packet dump ended for skb->len=%d\n", skb->len); |
| } |
| |
| #ifdef CONFIG_DEBUG_FS |
| /** |
| * Creates the root folder for the driver |
| */ |
| static void rndis_ipa_debugfs_init(struct rndis_ipa_dev *rndis_ipa_ctx) |
| { |
| const mode_t flags_read_write = 0666; |
| const mode_t flags_read_only = 0444; |
| const mode_t flags_write_only = 0222; |
| struct dentry *file; |
| struct dentry *aggr_directory; |
| |
| RNDIS_IPA_LOG_ENTRY(); |
| |
| if (!rndis_ipa_ctx) |
| return; |
| |
| rndis_ipa_ctx->directory = debugfs_create_dir(DEBUGFS_DIR_NAME, NULL); |
| if (!rndis_ipa_ctx->directory) { |
| RNDIS_IPA_ERROR("could not create debugfs directory entry\n"); |
| goto fail_directory; |
| } |
| |
| file = debugfs_create_bool |
| ("tx_filter", flags_read_write, |
| rndis_ipa_ctx->directory, &rndis_ipa_ctx->tx_filter); |
| if (!file) { |
| RNDIS_IPA_ERROR("could not create debugfs tx_filter file\n"); |
| goto fail_file; |
| } |
| |
| file = debugfs_create_bool |
| ("rx_filter", flags_read_write, |
| rndis_ipa_ctx->directory, &rndis_ipa_ctx->rx_filter); |
| if (!file) { |
| RNDIS_IPA_ERROR("could not create debugfs rx_filter file\n"); |
| goto fail_file; |
| } |
| |
| file = debugfs_create_bool |
| ("icmp_filter", flags_read_write, |
| rndis_ipa_ctx->directory, &rndis_ipa_ctx->icmp_filter); |
| if (!file) { |
| RNDIS_IPA_ERROR("could not create debugfs icmp_filter file\n"); |
| goto fail_file; |
| } |
| |
| file = debugfs_create_bool |
| ("rm_enable", flags_read_write, |
| rndis_ipa_ctx->directory, &rndis_ipa_ctx->rm_enable); |
| if (!file) { |
| RNDIS_IPA_ERROR("could not create debugfs rm file\n"); |
| goto fail_file; |
| } |
| |
| file = debugfs_create_u32 |
| ("outstanding_high", flags_read_write, |
| rndis_ipa_ctx->directory, |
| &rndis_ipa_ctx->outstanding_high); |
| if (!file) { |
| RNDIS_IPA_ERROR("could not create outstanding_high file\n"); |
| goto fail_file; |
| } |
| |
| file = debugfs_create_u32 |
| ("outstanding_low", flags_read_write, |
| rndis_ipa_ctx->directory, |
| &rndis_ipa_ctx->outstanding_low); |
| if (!file) { |
| RNDIS_IPA_ERROR("could not create outstanding_low file\n"); |
| goto fail_file; |
| } |
| |
| file = debugfs_create_file |
| ("outstanding", flags_read_only, |
| rndis_ipa_ctx->directory, |
| rndis_ipa_ctx, &rndis_ipa_debugfs_atomic_ops); |
| if (!file) { |
| RNDIS_IPA_ERROR("could not create outstanding file\n"); |
| goto fail_file; |
| } |
| |
| file = debugfs_create_u8 |
| ("state", flags_read_only, |
| rndis_ipa_ctx->directory, (u8 *)&rndis_ipa_ctx->state); |
| if (!file) { |
| RNDIS_IPA_ERROR("could not create state file\n"); |
| goto fail_file; |
| } |
| |
| file = debugfs_create_u32 |
| ("tx_dropped", flags_read_only, |
| rndis_ipa_ctx->directory, &rndis_ipa_ctx->tx_dropped); |
| if (!file) { |
| RNDIS_IPA_ERROR("could not create tx_dropped file\n"); |
| goto fail_file; |
| } |
| |
| file = debugfs_create_u32 |
| ("rx_dropped", flags_read_only, |
| rndis_ipa_ctx->directory, &rndis_ipa_ctx->rx_dropped); |
| if (!file) { |
| RNDIS_IPA_ERROR("could not create rx_dropped file\n"); |
| goto fail_file; |
| } |
| |
| aggr_directory = debugfs_create_dir |
| (DEBUGFS_AGGR_DIR_NAME, |
| rndis_ipa_ctx->directory); |
| if (!aggr_directory) { |
| RNDIS_IPA_ERROR("could not create debugfs aggr entry\n"); |
| goto fail_directory; |
| } |
| |
| file = debugfs_create_file |
| ("aggr_value_set", flags_write_only, |
| aggr_directory, |
| rndis_ipa_ctx, &rndis_ipa_aggr_ops); |
| if (!file) { |
| RNDIS_IPA_ERROR("could not create aggr_value_set file\n"); |
| goto fail_file; |
| } |
| |
| file = debugfs_create_u8 |
| ("aggr_enable", flags_read_write, |
| aggr_directory, (u8 *)&ipa_to_usb_ep_cfg.aggr.aggr_en); |
| if (!file) { |
| RNDIS_IPA_ERROR("could not create aggr_enable file\n"); |
| goto fail_file; |
| } |
| |
| file = debugfs_create_u8 |
| ("aggr_type", flags_read_write, |
| aggr_directory, (u8 *)&ipa_to_usb_ep_cfg.aggr.aggr); |
| if (!file) { |
| RNDIS_IPA_ERROR("could not create aggr_type file\n"); |
| goto fail_file; |
| } |
| |
| file = debugfs_create_u32 |
| ("aggr_byte_limit", flags_read_write, |
| aggr_directory, |
| &ipa_to_usb_ep_cfg.aggr.aggr_byte_limit); |
| if (!file) { |
| RNDIS_IPA_ERROR("could not create aggr_byte_limit file\n"); |
| goto fail_file; |
| } |
| |
| file = debugfs_create_u32 |
| ("aggr_time_limit", flags_read_write, |
| aggr_directory, |
| &ipa_to_usb_ep_cfg.aggr.aggr_time_limit); |
| if (!file) { |
| RNDIS_IPA_ERROR("could not create aggr_time_limit file\n"); |
| goto fail_file; |
| } |
| |
| file = debugfs_create_u32 |
| ("aggr_pkt_limit", flags_read_write, |
| aggr_directory, |
| &ipa_to_usb_ep_cfg.aggr.aggr_pkt_limit); |
| if (!file) { |
| RNDIS_IPA_ERROR("could not create aggr_pkt_limit file\n"); |
| goto fail_file; |
| } |
| |
| file = debugfs_create_bool |
| ("tx_dump_enable", flags_read_write, |
| rndis_ipa_ctx->directory, |
| &rndis_ipa_ctx->tx_dump_enable); |
| if (!file) { |
| RNDIS_IPA_ERROR("fail to create tx_dump_enable file\n"); |
| goto fail_file; |
| } |
| |
| file = debugfs_create_bool |
| ("rx_dump_enable", flags_read_write, |
| rndis_ipa_ctx->directory, |
| &rndis_ipa_ctx->rx_dump_enable); |
| if (!file) { |
| RNDIS_IPA_ERROR("fail to create rx_dump_enable file\n"); |
| goto fail_file; |
| } |
| |
| file = debugfs_create_bool |
| ("deaggregation_enable", flags_read_write, |
| rndis_ipa_ctx->directory, |
| &rndis_ipa_ctx->deaggregation_enable); |
| if (!file) { |
| RNDIS_IPA_ERROR("fail to create deaggregation_enable file\n"); |
| goto fail_file; |
| } |
| |
| file = debugfs_create_u32 |
| ("error_msec_sleep_time", flags_read_write, |
| rndis_ipa_ctx->directory, |
| &rndis_ipa_ctx->error_msec_sleep_time); |
| if (!file) { |
| RNDIS_IPA_ERROR("fail to create error_msec_sleep_time file\n"); |
| goto fail_file; |
| } |
| |
| file = debugfs_create_bool |
| ("during_xmit_error", flags_read_only, |
| rndis_ipa_ctx->directory, |
| &rndis_ipa_ctx->during_xmit_error); |
| if (!file) { |
| RNDIS_IPA_ERROR("fail to create during_xmit_error file\n"); |
| goto fail_file; |
| } |
| |
| RNDIS_IPA_DEBUG("debugfs entries were created\n"); |
| RNDIS_IPA_LOG_EXIT(); |
| |
| return; |
| fail_file: |
| debugfs_remove_recursive(rndis_ipa_ctx->directory); |
| fail_directory: |
| return; |
| } |
| |
| static void rndis_ipa_debugfs_destroy(struct rndis_ipa_dev *rndis_ipa_ctx) |
| { |
| debugfs_remove_recursive(rndis_ipa_ctx->directory); |
| } |
| |
| #else /* !CONFIG_DEBUG_FS */ |
| |
| static void rndis_ipa_debugfs_init(struct rndis_ipa_dev *rndis_ipa_ctx) {} |
| |
| static void rndis_ipa_debugfs_destroy(struct rndis_ipa_dev *rndis_ipa_ctx) {} |
| |
| #endif /* CONFIG_DEBUG_FS*/ |
| |
| static int rndis_ipa_debugfs_aggr_open |
| (struct inode *inode, |
| struct file *file) |
| { |
| struct rndis_ipa_dev *rndis_ipa_ctx = inode->i_private; |
| |
| file->private_data = rndis_ipa_ctx; |
| |
| return 0; |
| } |
| |
| static ssize_t rndis_ipa_debugfs_aggr_write |
| (struct file *file, |
| const char __user *buf, size_t count, loff_t *ppos) |
| { |
| struct rndis_ipa_dev *rndis_ipa_ctx = file->private_data; |
| int result; |
| |
| result = ipa_cfg_ep(rndis_ipa_ctx->usb_to_ipa_hdl, &ipa_to_usb_ep_cfg); |
| if (result) { |
| pr_err("failed to re-configure USB to IPA point\n"); |
| return result; |
| } |
| pr_info("IPA<-USB end-point re-configured\n"); |
| |
| return count; |
| } |
| |
| static int rndis_ipa_debugfs_atomic_open(struct inode *inode, struct file *file) |
| { |
| struct rndis_ipa_dev *rndis_ipa_ctx = inode->i_private; |
| |
| RNDIS_IPA_LOG_ENTRY(); |
| |
| file->private_data = &rndis_ipa_ctx->outstanding_pkts; |
| |
| RNDIS_IPA_LOG_EXIT(); |
| |
| return 0; |
| } |
| |
| static ssize_t rndis_ipa_debugfs_atomic_read |
| (struct file *file, char __user *ubuf, size_t count, loff_t *ppos) |
| { |
| int nbytes; |
| u8 atomic_str[DEBUGFS_TEMP_BUF_SIZE] = {0}; |
| atomic_t *atomic_var = file->private_data; |
| |
| RNDIS_IPA_LOG_ENTRY(); |
| |
| nbytes = scnprintf |
| (atomic_str, sizeof(atomic_str), "%d\n", |
| atomic_read(atomic_var)); |
| |
| RNDIS_IPA_LOG_EXIT(); |
| |
| return simple_read_from_buffer(ubuf, count, ppos, atomic_str, nbytes); |
| } |
| |
| static int rndis_ipa_init_module(void) |
| { |
| pr_info("RNDIS_IPA module is loaded."); |
| return 0; |
| } |
| |
| static void rndis_ipa_cleanup_module(void) |
| { |
| pr_info("RNDIS_IPA module is unloaded."); |
| } |
| |
| MODULE_LICENSE("GPL v2"); |
| MODULE_DESCRIPTION("RNDIS_IPA network interface"); |
| |
| late_initcall(rndis_ipa_init_module); |
| module_exit(rndis_ipa_cleanup_module); |