From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ... --- drivers/usb/serial/usb_wwan.c | 658 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 658 insertions(+) create mode 100644 drivers/usb/serial/usb_wwan.c (limited to 'drivers/usb/serial/usb_wwan.c') diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c new file mode 100644 index 000000000..0017f6e96 --- /dev/null +++ b/drivers/usb/serial/usb_wwan.c @@ -0,0 +1,658 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + USB Driver layer for GSM modems + + Copyright (C) 2005 Matthias Urlichs + + Portions copied from the Keyspan driver by Hugh Blemings + + History: see the git log. + + Work sponsored by: Sigos GmbH, Germany + + This driver exists because the "normal" serial driver doesn't work too well + with GSM modems. Issues: + - data loss -- one single Receive URB is not nearly enough + - controlling the baud rate doesn't make sense +*/ + +#define DRIVER_AUTHOR "Matthias Urlichs " +#define DRIVER_DESC "USB Driver for GSM modems" + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "usb-wwan.h" + +/* + * Generate DTR/RTS signals on the port using the SET_CONTROL_LINE_STATE request + * in CDC ACM. + */ +static int usb_wwan_send_setup(struct usb_serial_port *port) +{ + struct usb_serial *serial = port->serial; + struct usb_wwan_port_private *portdata; + int val = 0; + int ifnum; + int res; + + portdata = usb_get_serial_port_data(port); + + if (portdata->dtr_state) + val |= USB_CDC_CTRL_DTR; + if (portdata->rts_state) + val |= USB_CDC_CTRL_RTS; + + ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber; + + res = usb_autopm_get_interface(serial->interface); + if (res) + return res; + + res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + USB_CDC_REQ_SET_CONTROL_LINE_STATE, + USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE, + val, ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT); + + usb_autopm_put_interface(port->serial->interface); + + return res; +} + +void usb_wwan_dtr_rts(struct usb_serial_port *port, int on) +{ + struct usb_wwan_port_private *portdata; + struct usb_wwan_intf_private *intfdata; + + intfdata = usb_get_serial_data(port->serial); + + if (!intfdata->use_send_setup) + return; + + portdata = usb_get_serial_port_data(port); + /* FIXME: locking */ + portdata->rts_state = on; + portdata->dtr_state = on; + + usb_wwan_send_setup(port); +} +EXPORT_SYMBOL(usb_wwan_dtr_rts); + +int usb_wwan_tiocmget(struct tty_struct *tty) +{ + struct usb_serial_port *port = tty->driver_data; + unsigned int value; + struct usb_wwan_port_private *portdata; + + portdata = usb_get_serial_port_data(port); + + value = ((portdata->rts_state) ? TIOCM_RTS : 0) | + ((portdata->dtr_state) ? TIOCM_DTR : 0) | + ((portdata->cts_state) ? TIOCM_CTS : 0) | + ((portdata->dsr_state) ? TIOCM_DSR : 0) | + ((portdata->dcd_state) ? TIOCM_CAR : 0) | + ((portdata->ri_state) ? TIOCM_RNG : 0); + + return value; +} +EXPORT_SYMBOL(usb_wwan_tiocmget); + +int usb_wwan_tiocmset(struct tty_struct *tty, + unsigned int set, unsigned int clear) +{ + struct usb_serial_port *port = tty->driver_data; + struct usb_wwan_port_private *portdata; + struct usb_wwan_intf_private *intfdata; + + portdata = usb_get_serial_port_data(port); + intfdata = usb_get_serial_data(port->serial); + + if (!intfdata->use_send_setup) + return -EINVAL; + + /* FIXME: what locks portdata fields ? */ + if (set & TIOCM_RTS) + portdata->rts_state = 1; + if (set & TIOCM_DTR) + portdata->dtr_state = 1; + + if (clear & TIOCM_RTS) + portdata->rts_state = 0; + if (clear & TIOCM_DTR) + portdata->dtr_state = 0; + return usb_wwan_send_setup(port); +} +EXPORT_SYMBOL(usb_wwan_tiocmset); + +int usb_wwan_write(struct tty_struct *tty, struct usb_serial_port *port, + const unsigned char *buf, int count) +{ + struct usb_wwan_port_private *portdata; + struct usb_wwan_intf_private *intfdata; + int i; + int left, todo; + struct urb *this_urb = NULL; /* spurious */ + int err; + unsigned long flags; + + portdata = usb_get_serial_port_data(port); + intfdata = usb_get_serial_data(port->serial); + + dev_dbg(&port->dev, "%s: write (%d chars)\n", __func__, count); + + left = count; + for (i = 0; left > 0 && i < N_OUT_URB; i++) { + todo = left; + if (todo > OUT_BUFLEN) + todo = OUT_BUFLEN; + + this_urb = portdata->out_urbs[i]; + if (test_and_set_bit(i, &portdata->out_busy)) { + if (time_before(jiffies, + portdata->tx_start_time[i] + 10 * HZ)) + continue; + usb_unlink_urb(this_urb); + continue; + } + dev_dbg(&port->dev, "%s: endpoint %d buf %d\n", __func__, + usb_pipeendpoint(this_urb->pipe), i); + + err = usb_autopm_get_interface_async(port->serial->interface); + if (err < 0) { + clear_bit(i, &portdata->out_busy); + break; + } + + /* send the data */ + memcpy(this_urb->transfer_buffer, buf, todo); + this_urb->transfer_buffer_length = todo; + + spin_lock_irqsave(&intfdata->susp_lock, flags); + if (intfdata->suspended) { + usb_anchor_urb(this_urb, &portdata->delayed); + spin_unlock_irqrestore(&intfdata->susp_lock, flags); + } else { + intfdata->in_flight++; + spin_unlock_irqrestore(&intfdata->susp_lock, flags); + err = usb_submit_urb(this_urb, GFP_ATOMIC); + if (err) { + dev_err(&port->dev, + "%s: submit urb %d failed: %d\n", + __func__, i, err); + clear_bit(i, &portdata->out_busy); + spin_lock_irqsave(&intfdata->susp_lock, flags); + intfdata->in_flight--; + spin_unlock_irqrestore(&intfdata->susp_lock, + flags); + usb_autopm_put_interface_async(port->serial->interface); + break; + } + } + + portdata->tx_start_time[i] = jiffies; + buf += todo; + left -= todo; + } + + count -= left; + dev_dbg(&port->dev, "%s: wrote (did %d)\n", __func__, count); + return count; +} +EXPORT_SYMBOL(usb_wwan_write); + +static void usb_wwan_indat_callback(struct urb *urb) +{ + int err; + int endpoint; + struct usb_serial_port *port; + struct device *dev; + unsigned char *data = urb->transfer_buffer; + int status = urb->status; + + endpoint = usb_pipeendpoint(urb->pipe); + port = urb->context; + dev = &port->dev; + + if (status) { + dev_dbg(dev, "%s: nonzero status: %d on endpoint %02x.\n", + __func__, status, endpoint); + + /* don't resubmit on fatal errors */ + if (status == -ESHUTDOWN || status == -ENOENT) + return; + } else { + if (urb->actual_length) { + tty_insert_flip_string(&port->port, data, + urb->actual_length); + tty_flip_buffer_push(&port->port); + } else + dev_dbg(dev, "%s: empty read urb received\n", __func__); + } + /* Resubmit urb so we continue receiving */ + err = usb_submit_urb(urb, GFP_ATOMIC); + if (err) { + if (err != -EPERM && err != -ENODEV) { + dev_err(dev, "%s: resubmit read urb failed. (%d)\n", + __func__, err); + /* busy also in error unless we are killed */ + usb_mark_last_busy(port->serial->dev); + } + } else { + usb_mark_last_busy(port->serial->dev); + } +} + +static void usb_wwan_outdat_callback(struct urb *urb) +{ + struct usb_serial_port *port; + struct usb_wwan_port_private *portdata; + struct usb_wwan_intf_private *intfdata; + unsigned long flags; + int i; + + port = urb->context; + intfdata = usb_get_serial_data(port->serial); + + usb_serial_port_softint(port); + usb_autopm_put_interface_async(port->serial->interface); + portdata = usb_get_serial_port_data(port); + spin_lock_irqsave(&intfdata->susp_lock, flags); + intfdata->in_flight--; + spin_unlock_irqrestore(&intfdata->susp_lock, flags); + + for (i = 0; i < N_OUT_URB; ++i) { + if (portdata->out_urbs[i] == urb) { + smp_mb__before_atomic(); + clear_bit(i, &portdata->out_busy); + break; + } + } +} + +unsigned int usb_wwan_write_room(struct tty_struct *tty) +{ + struct usb_serial_port *port = tty->driver_data; + struct usb_wwan_port_private *portdata; + int i; + unsigned int data_len = 0; + struct urb *this_urb; + + portdata = usb_get_serial_port_data(port); + + for (i = 0; i < N_OUT_URB; i++) { + this_urb = portdata->out_urbs[i]; + if (this_urb && !test_bit(i, &portdata->out_busy)) + data_len += OUT_BUFLEN; + } + + dev_dbg(&port->dev, "%s: %u\n", __func__, data_len); + return data_len; +} +EXPORT_SYMBOL(usb_wwan_write_room); + +unsigned int usb_wwan_chars_in_buffer(struct tty_struct *tty) +{ + struct usb_serial_port *port = tty->driver_data; + struct usb_wwan_port_private *portdata; + int i; + unsigned int data_len = 0; + struct urb *this_urb; + + portdata = usb_get_serial_port_data(port); + + for (i = 0; i < N_OUT_URB; i++) { + this_urb = portdata->out_urbs[i]; + /* FIXME: This locking is insufficient as this_urb may + go unused during the test */ + if (this_urb && test_bit(i, &portdata->out_busy)) + data_len += this_urb->transfer_buffer_length; + } + dev_dbg(&port->dev, "%s: %u\n", __func__, data_len); + return data_len; +} +EXPORT_SYMBOL(usb_wwan_chars_in_buffer); + +int usb_wwan_open(struct tty_struct *tty, struct usb_serial_port *port) +{ + struct usb_wwan_port_private *portdata; + struct usb_wwan_intf_private *intfdata; + struct usb_serial *serial = port->serial; + int i, err; + struct urb *urb; + + portdata = usb_get_serial_port_data(port); + intfdata = usb_get_serial_data(serial); + + if (port->interrupt_in_urb) { + err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); + if (err) { + dev_err(&port->dev, "%s: submit int urb failed: %d\n", + __func__, err); + } + } + + /* Start reading from the IN endpoint */ + for (i = 0; i < N_IN_URB; i++) { + urb = portdata->in_urbs[i]; + if (!urb) + continue; + err = usb_submit_urb(urb, GFP_KERNEL); + if (err) { + dev_err(&port->dev, + "%s: submit read urb %d failed: %d\n", + __func__, i, err); + } + } + + spin_lock_irq(&intfdata->susp_lock); + if (++intfdata->open_ports == 1) + serial->interface->needs_remote_wakeup = 1; + spin_unlock_irq(&intfdata->susp_lock); + /* this balances a get in the generic USB serial code */ + usb_autopm_put_interface(serial->interface); + + return 0; +} +EXPORT_SYMBOL(usb_wwan_open); + +static void unbusy_queued_urb(struct urb *urb, + struct usb_wwan_port_private *portdata) +{ + int i; + + for (i = 0; i < N_OUT_URB; i++) { + if (urb == portdata->out_urbs[i]) { + clear_bit(i, &portdata->out_busy); + break; + } + } +} + +void usb_wwan_close(struct usb_serial_port *port) +{ + int i; + struct usb_serial *serial = port->serial; + struct usb_wwan_port_private *portdata; + struct usb_wwan_intf_private *intfdata = usb_get_serial_data(serial); + struct urb *urb; + + portdata = usb_get_serial_port_data(port); + + /* + * Need to take susp_lock to make sure port is not already being + * resumed, but no need to hold it due to the tty-port initialized + * flag. + */ + spin_lock_irq(&intfdata->susp_lock); + if (--intfdata->open_ports == 0) + serial->interface->needs_remote_wakeup = 0; + spin_unlock_irq(&intfdata->susp_lock); + + for (;;) { + urb = usb_get_from_anchor(&portdata->delayed); + if (!urb) + break; + unbusy_queued_urb(urb, portdata); + usb_autopm_put_interface_async(serial->interface); + } + + for (i = 0; i < N_IN_URB; i++) + usb_kill_urb(portdata->in_urbs[i]); + for (i = 0; i < N_OUT_URB; i++) + usb_kill_urb(portdata->out_urbs[i]); + usb_kill_urb(port->interrupt_in_urb); + + usb_autopm_get_interface_no_resume(serial->interface); +} +EXPORT_SYMBOL(usb_wwan_close); + +static struct urb *usb_wwan_setup_urb(struct usb_serial_port *port, + int endpoint, + int dir, void *ctx, char *buf, int len, + void (*callback) (struct urb *)) +{ + struct usb_serial *serial = port->serial; + struct usb_wwan_intf_private *intfdata = usb_get_serial_data(serial); + struct urb *urb; + + urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */ + if (!urb) + return NULL; + + usb_fill_bulk_urb(urb, serial->dev, + usb_sndbulkpipe(serial->dev, endpoint) | dir, + buf, len, callback, ctx); + + if (intfdata->use_zlp && dir == USB_DIR_OUT) + urb->transfer_flags |= URB_ZERO_PACKET; + + return urb; +} + +int usb_wwan_port_probe(struct usb_serial_port *port) +{ + struct usb_wwan_port_private *portdata; + struct urb *urb; + u8 *buffer; + int i; + + if (!port->bulk_in_size || !port->bulk_out_size) + return -ENODEV; + + portdata = kzalloc(sizeof(*portdata), GFP_KERNEL); + if (!portdata) + return -ENOMEM; + + init_usb_anchor(&portdata->delayed); + + for (i = 0; i < N_IN_URB; i++) { + buffer = (u8 *)__get_free_page(GFP_KERNEL); + if (!buffer) + goto bail_out_error; + portdata->in_buffer[i] = buffer; + + urb = usb_wwan_setup_urb(port, port->bulk_in_endpointAddress, + USB_DIR_IN, port, + buffer, IN_BUFLEN, + usb_wwan_indat_callback); + portdata->in_urbs[i] = urb; + } + + for (i = 0; i < N_OUT_URB; i++) { + buffer = kmalloc(OUT_BUFLEN, GFP_KERNEL); + if (!buffer) + goto bail_out_error2; + portdata->out_buffer[i] = buffer; + + urb = usb_wwan_setup_urb(port, port->bulk_out_endpointAddress, + USB_DIR_OUT, port, + buffer, OUT_BUFLEN, + usb_wwan_outdat_callback); + portdata->out_urbs[i] = urb; + } + + usb_set_serial_port_data(port, portdata); + + return 0; + +bail_out_error2: + for (i = 0; i < N_OUT_URB; i++) { + usb_free_urb(portdata->out_urbs[i]); + kfree(portdata->out_buffer[i]); + } +bail_out_error: + for (i = 0; i < N_IN_URB; i++) { + usb_free_urb(portdata->in_urbs[i]); + free_page((unsigned long)portdata->in_buffer[i]); + } + kfree(portdata); + + return -ENOMEM; +} +EXPORT_SYMBOL_GPL(usb_wwan_port_probe); + +void usb_wwan_port_remove(struct usb_serial_port *port) +{ + int i; + struct usb_wwan_port_private *portdata; + + portdata = usb_get_serial_port_data(port); + usb_set_serial_port_data(port, NULL); + + for (i = 0; i < N_IN_URB; i++) { + usb_free_urb(portdata->in_urbs[i]); + free_page((unsigned long)portdata->in_buffer[i]); + } + for (i = 0; i < N_OUT_URB; i++) { + usb_free_urb(portdata->out_urbs[i]); + kfree(portdata->out_buffer[i]); + } + + kfree(portdata); +} +EXPORT_SYMBOL(usb_wwan_port_remove); + +#ifdef CONFIG_PM +static void stop_urbs(struct usb_serial *serial) +{ + int i, j; + struct usb_serial_port *port; + struct usb_wwan_port_private *portdata; + + for (i = 0; i < serial->num_ports; ++i) { + port = serial->port[i]; + portdata = usb_get_serial_port_data(port); + if (!portdata) + continue; + for (j = 0; j < N_IN_URB; j++) + usb_kill_urb(portdata->in_urbs[j]); + for (j = 0; j < N_OUT_URB; j++) + usb_kill_urb(portdata->out_urbs[j]); + usb_kill_urb(port->interrupt_in_urb); + } +} + +int usb_wwan_suspend(struct usb_serial *serial, pm_message_t message) +{ + struct usb_wwan_intf_private *intfdata = usb_get_serial_data(serial); + + spin_lock_irq(&intfdata->susp_lock); + if (PMSG_IS_AUTO(message)) { + if (intfdata->in_flight) { + spin_unlock_irq(&intfdata->susp_lock); + return -EBUSY; + } + } + intfdata->suspended = 1; + spin_unlock_irq(&intfdata->susp_lock); + + stop_urbs(serial); + + return 0; +} +EXPORT_SYMBOL(usb_wwan_suspend); + +/* Caller must hold susp_lock. */ +static int usb_wwan_submit_delayed_urbs(struct usb_serial_port *port) +{ + struct usb_serial *serial = port->serial; + struct usb_wwan_intf_private *data = usb_get_serial_data(serial); + struct usb_wwan_port_private *portdata; + struct urb *urb; + int err_count = 0; + int err; + + portdata = usb_get_serial_port_data(port); + + for (;;) { + urb = usb_get_from_anchor(&portdata->delayed); + if (!urb) + break; + + err = usb_submit_urb(urb, GFP_ATOMIC); + if (err) { + dev_err(&port->dev, "%s: submit urb failed: %d\n", + __func__, err); + err_count++; + unbusy_queued_urb(urb, portdata); + usb_autopm_put_interface_async(serial->interface); + continue; + } + data->in_flight++; + } + + if (err_count) + return -EIO; + + return 0; +} + +int usb_wwan_resume(struct usb_serial *serial) +{ + int i, j; + struct usb_serial_port *port; + struct usb_wwan_intf_private *intfdata = usb_get_serial_data(serial); + struct usb_wwan_port_private *portdata; + struct urb *urb; + int err; + int err_count = 0; + + spin_lock_irq(&intfdata->susp_lock); + for (i = 0; i < serial->num_ports; i++) { + port = serial->port[i]; + + if (!tty_port_initialized(&port->port)) + continue; + + portdata = usb_get_serial_port_data(port); + + if (port->interrupt_in_urb) { + err = usb_submit_urb(port->interrupt_in_urb, + GFP_ATOMIC); + if (err) { + dev_err(&port->dev, + "%s: submit int urb failed: %d\n", + __func__, err); + err_count++; + } + } + + err = usb_wwan_submit_delayed_urbs(port); + if (err) + err_count++; + + for (j = 0; j < N_IN_URB; j++) { + urb = portdata->in_urbs[j]; + err = usb_submit_urb(urb, GFP_ATOMIC); + if (err < 0) { + dev_err(&port->dev, + "%s: submit read urb %d failed: %d\n", + __func__, i, err); + err_count++; + } + } + } + intfdata->suspended = 0; + spin_unlock_irq(&intfdata->susp_lock); + + if (err_count) + return -EIO; + + return 0; +} +EXPORT_SYMBOL(usb_wwan_resume); +#endif + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3