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/net/wwan/iosm/iosm_ipc_imem_ops.c | 654 ++++++++++++++++++++++++++++++ 1 file changed, 654 insertions(+) create mode 100644 drivers/net/wwan/iosm/iosm_ipc_imem_ops.c (limited to 'drivers/net/wwan/iosm/iosm_ipc_imem_ops.c') diff --git a/drivers/net/wwan/iosm/iosm_ipc_imem_ops.c b/drivers/net/wwan/iosm/iosm_ipc_imem_ops.c new file mode 100644 index 000000000..66b90cc4c --- /dev/null +++ b/drivers/net/wwan/iosm/iosm_ipc_imem_ops.c @@ -0,0 +1,654 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2020-21 Intel Corporation. + */ + +#include + +#include "iosm_ipc_chnl_cfg.h" +#include "iosm_ipc_devlink.h" +#include "iosm_ipc_imem.h" +#include "iosm_ipc_imem_ops.h" +#include "iosm_ipc_port.h" +#include "iosm_ipc_task_queue.h" + +/* Open a packet data online channel between the network layer and CP. */ +int ipc_imem_sys_wwan_open(struct iosm_imem *ipc_imem, int if_id) +{ + dev_dbg(ipc_imem->dev, "%s if id: %d", + ipc_imem_phase_get_string(ipc_imem->phase), if_id); + + /* The network interface is only supported in the runtime phase. */ + if (ipc_imem_phase_update(ipc_imem) != IPC_P_RUN) { + dev_err(ipc_imem->dev, "net:%d : refused phase %s", if_id, + ipc_imem_phase_get_string(ipc_imem->phase)); + return -EIO; + } + + return ipc_mux_open_session(ipc_imem->mux, if_id); +} + +/* Release a net link to CP. */ +void ipc_imem_sys_wwan_close(struct iosm_imem *ipc_imem, int if_id, + int channel_id) +{ + if (ipc_imem->mux && if_id >= IP_MUX_SESSION_START && + if_id <= IP_MUX_SESSION_END) + ipc_mux_close_session(ipc_imem->mux, if_id); +} + +/* Tasklet call to do uplink transfer. */ +static int ipc_imem_tq_cdev_write(struct iosm_imem *ipc_imem, int arg, + void *msg, size_t size) +{ + ipc_imem_ul_send(ipc_imem); + + return 0; +} + +/* Through tasklet to do sio write. */ +static int ipc_imem_call_cdev_write(struct iosm_imem *ipc_imem) +{ + return ipc_task_queue_send_task(ipc_imem, ipc_imem_tq_cdev_write, 0, + NULL, 0, false); +} + +/* Function for transfer UL data */ +int ipc_imem_sys_wwan_transmit(struct iosm_imem *ipc_imem, + int if_id, int channel_id, struct sk_buff *skb) +{ + int ret = -EINVAL; + + if (!ipc_imem || channel_id < 0) + goto out; + + /* Is CP Running? */ + if (ipc_imem->phase != IPC_P_RUN) { + dev_dbg(ipc_imem->dev, "phase %s transmit", + ipc_imem_phase_get_string(ipc_imem->phase)); + ret = -EIO; + goto out; + } + + /* Route the UL packet through IP MUX Layer */ + ret = ipc_mux_ul_trigger_encode(ipc_imem->mux, if_id, skb); +out: + return ret; +} + +/* Initialize wwan channel */ +void ipc_imem_wwan_channel_init(struct iosm_imem *ipc_imem, + enum ipc_mux_protocol mux_type) +{ + struct ipc_chnl_cfg chnl_cfg = { 0 }; + + ipc_imem->cp_version = ipc_mmio_get_cp_version(ipc_imem->mmio); + + /* If modem version is invalid (0xffffffff), do not initialize WWAN. */ + if (ipc_imem->cp_version == -1) { + dev_err(ipc_imem->dev, "invalid CP version"); + return; + } + + ipc_chnl_cfg_get(&chnl_cfg, ipc_imem->nr_of_channels); + + if (ipc_imem->mmio->mux_protocol == MUX_AGGREGATION && + ipc_imem->nr_of_channels == IPC_MEM_IP_CHL_ID_0) { + chnl_cfg.ul_nr_of_entries = IPC_MEM_MAX_TDS_MUX_AGGR_UL; + chnl_cfg.dl_nr_of_entries = IPC_MEM_MAX_TDS_MUX_AGGR_DL; + chnl_cfg.dl_buf_size = IPC_MEM_MAX_ADB_BUF_SIZE; + } + + ipc_imem_channel_init(ipc_imem, IPC_CTYPE_WWAN, chnl_cfg, + IRQ_MOD_OFF); + + /* WWAN registration. */ + ipc_imem->wwan = ipc_wwan_init(ipc_imem, ipc_imem->dev); + if (!ipc_imem->wwan) + dev_err(ipc_imem->dev, + "failed to register the ipc_wwan interfaces"); +} + +/* Map SKB to DMA for transfer */ +static int ipc_imem_map_skb_to_dma(struct iosm_imem *ipc_imem, + struct sk_buff *skb) +{ + struct iosm_pcie *ipc_pcie = ipc_imem->pcie; + char *buf = skb->data; + int len = skb->len; + dma_addr_t mapping; + int ret; + + ret = ipc_pcie_addr_map(ipc_pcie, buf, len, &mapping, DMA_TO_DEVICE); + + if (ret) + goto err; + + BUILD_BUG_ON(sizeof(*IPC_CB(skb)) > sizeof(skb->cb)); + + IPC_CB(skb)->mapping = mapping; + IPC_CB(skb)->direction = DMA_TO_DEVICE; + IPC_CB(skb)->len = len; + IPC_CB(skb)->op_type = (u8)UL_DEFAULT; + +err: + return ret; +} + +/* return true if channel is ready for use */ +static bool ipc_imem_is_channel_active(struct iosm_imem *ipc_imem, + struct ipc_mem_channel *channel) +{ + enum ipc_phase phase; + + /* Update the current operation phase. */ + phase = ipc_imem->phase; + + /* Select the operation depending on the execution stage. */ + switch (phase) { + case IPC_P_RUN: + case IPC_P_PSI: + case IPC_P_EBL: + break; + + case IPC_P_ROM: + /* Prepare the PSI image for the CP ROM driver and + * suspend the flash app. + */ + if (channel->state != IMEM_CHANNEL_RESERVED) { + dev_err(ipc_imem->dev, + "ch[%d]:invalid channel state %d,expected %d", + channel->channel_id, channel->state, + IMEM_CHANNEL_RESERVED); + goto channel_unavailable; + } + goto channel_available; + + default: + /* Ignore uplink actions in all other phases. */ + dev_err(ipc_imem->dev, "ch[%d]: confused phase %d", + channel->channel_id, phase); + goto channel_unavailable; + } + /* Check the full availability of the channel. */ + if (channel->state != IMEM_CHANNEL_ACTIVE) { + dev_err(ipc_imem->dev, "ch[%d]: confused channel state %d", + channel->channel_id, channel->state); + goto channel_unavailable; + } + +channel_available: + return true; + +channel_unavailable: + return false; +} + +/** + * ipc_imem_sys_port_close - Release a sio link to CP. + * @ipc_imem: Imem instance. + * @channel: Channel instance. + */ +void ipc_imem_sys_port_close(struct iosm_imem *ipc_imem, + struct ipc_mem_channel *channel) +{ + enum ipc_phase curr_phase; + int status = 0; + u32 tail = 0; + + curr_phase = ipc_imem->phase; + + /* If current phase is IPC_P_OFF or SIO ID is -ve then + * channel is already freed. Nothing to do. + */ + if (curr_phase == IPC_P_OFF) { + dev_err(ipc_imem->dev, + "nothing to do. Current Phase: %s", + ipc_imem_phase_get_string(curr_phase)); + return; + } + + if (channel->state == IMEM_CHANNEL_FREE) { + dev_err(ipc_imem->dev, "ch[%d]: invalid channel state %d", + channel->channel_id, channel->state); + return; + } + + /* If there are any pending TDs then wait for Timeout/Completion before + * closing pipe. + */ + if (channel->ul_pipe.old_tail != channel->ul_pipe.old_head) { + ipc_imem->app_notify_ul_pend = 1; + + /* Suspend the user app and wait a certain time for processing + * UL Data. + */ + status = wait_for_completion_interruptible_timeout + (&ipc_imem->ul_pend_sem, + msecs_to_jiffies(IPC_PEND_DATA_TIMEOUT)); + if (status == 0) { + dev_dbg(ipc_imem->dev, + "Pend data Timeout UL-Pipe:%d Head:%d Tail:%d", + channel->ul_pipe.pipe_nr, + channel->ul_pipe.old_head, + channel->ul_pipe.old_tail); + } + + ipc_imem->app_notify_ul_pend = 0; + } + + /* If there are any pending TDs then wait for Timeout/Completion before + * closing pipe. + */ + ipc_protocol_get_head_tail_index(ipc_imem->ipc_protocol, + &channel->dl_pipe, NULL, &tail); + + if (tail != channel->dl_pipe.old_tail) { + ipc_imem->app_notify_dl_pend = 1; + + /* Suspend the user app and wait a certain time for processing + * DL Data. + */ + status = wait_for_completion_interruptible_timeout + (&ipc_imem->dl_pend_sem, + msecs_to_jiffies(IPC_PEND_DATA_TIMEOUT)); + if (status == 0) { + dev_dbg(ipc_imem->dev, + "Pend data Timeout DL-Pipe:%d Head:%d Tail:%d", + channel->dl_pipe.pipe_nr, + channel->dl_pipe.old_head, + channel->dl_pipe.old_tail); + } + + ipc_imem->app_notify_dl_pend = 0; + } + + /* Due to wait for completion in messages, there is a small window + * between closing the pipe and updating the channel is closed. In this + * small window there could be HP update from Host Driver. Hence update + * the channel state as CLOSING to aviod unnecessary interrupt + * towards CP. + */ + channel->state = IMEM_CHANNEL_CLOSING; + + ipc_imem_pipe_close(ipc_imem, &channel->ul_pipe); + ipc_imem_pipe_close(ipc_imem, &channel->dl_pipe); + + ipc_imem_channel_free(channel); +} + +/* Open a PORT link to CP and return the channel */ +struct ipc_mem_channel *ipc_imem_sys_port_open(struct iosm_imem *ipc_imem, + int chl_id, int hp_id) +{ + struct ipc_mem_channel *channel; + int ch_id; + + /* The PORT interface is only supported in the runtime phase. */ + if (ipc_imem_phase_update(ipc_imem) != IPC_P_RUN) { + dev_err(ipc_imem->dev, "PORT open refused, phase %s", + ipc_imem_phase_get_string(ipc_imem->phase)); + return NULL; + } + + ch_id = ipc_imem_channel_alloc(ipc_imem, chl_id, IPC_CTYPE_CTRL); + + if (ch_id < 0) { + dev_err(ipc_imem->dev, "reservation of an PORT chnl id failed"); + return NULL; + } + + channel = ipc_imem_channel_open(ipc_imem, ch_id, hp_id); + + if (!channel) { + dev_err(ipc_imem->dev, "PORT channel id open failed"); + return NULL; + } + + return channel; +} + +/* transfer skb to modem */ +int ipc_imem_sys_cdev_write(struct iosm_cdev *ipc_cdev, struct sk_buff *skb) +{ + struct ipc_mem_channel *channel = ipc_cdev->channel; + struct iosm_imem *ipc_imem = ipc_cdev->ipc_imem; + int ret = -EIO; + + if (!ipc_imem_is_channel_active(ipc_imem, channel) || + ipc_imem->phase == IPC_P_OFF_REQ) + goto out; + + ret = ipc_imem_map_skb_to_dma(ipc_imem, skb); + + if (ret) + goto out; + + /* Add skb to the uplink skbuf accumulator. */ + skb_queue_tail(&channel->ul_list, skb); + + ret = ipc_imem_call_cdev_write(ipc_imem); + + if (ret) { + skb_dequeue_tail(&channel->ul_list); + dev_err(ipc_cdev->dev, "channel id[%d] write failed\n", + ipc_cdev->channel->channel_id); + } +out: + return ret; +} + +/* Open a SIO link to CP and return the channel instance */ +struct ipc_mem_channel *ipc_imem_sys_devlink_open(struct iosm_imem *ipc_imem) +{ + struct ipc_mem_channel *channel; + enum ipc_phase phase; + int channel_id; + + phase = ipc_imem_phase_update(ipc_imem); + switch (phase) { + case IPC_P_OFF: + case IPC_P_ROM: + /* Get a channel id as flash id and reserve it. */ + channel_id = ipc_imem_channel_alloc(ipc_imem, + IPC_MEM_CTRL_CHL_ID_7, + IPC_CTYPE_CTRL); + + if (channel_id < 0) { + dev_err(ipc_imem->dev, + "reservation of a flash channel id failed"); + goto error; + } + + ipc_imem->ipc_devlink->devlink_sio.channel_id = channel_id; + channel = &ipc_imem->channels[channel_id]; + + /* Enqueue chip info data to be read */ + if (ipc_imem_devlink_trigger_chip_info(ipc_imem)) { + dev_err(ipc_imem->dev, "Enqueue of chip info failed"); + channel->state = IMEM_CHANNEL_FREE; + goto error; + } + + return channel; + + case IPC_P_PSI: + case IPC_P_EBL: + ipc_imem->cp_version = ipc_mmio_get_cp_version(ipc_imem->mmio); + if (ipc_imem->cp_version == -1) { + dev_err(ipc_imem->dev, "invalid CP version"); + goto error; + } + + channel_id = ipc_imem->ipc_devlink->devlink_sio.channel_id; + return ipc_imem_channel_open(ipc_imem, channel_id, + IPC_HP_CDEV_OPEN); + + default: + /* CP is in the wrong state (e.g. CRASH or CD_READY) */ + dev_err(ipc_imem->dev, "SIO open refused, phase %d", phase); + } +error: + return NULL; +} + +/* Release a SIO channel link to CP. */ +void ipc_imem_sys_devlink_close(struct iosm_devlink *ipc_devlink) +{ + struct iosm_imem *ipc_imem = ipc_devlink->pcie->imem; + int boot_check_timeout = BOOT_CHECK_DEFAULT_TIMEOUT; + enum ipc_mem_exec_stage exec_stage; + struct ipc_mem_channel *channel; + int status = 0; + u32 tail = 0; + + channel = ipc_imem->ipc_devlink->devlink_sio.channel; + /* Increase the total wait time to boot_check_timeout */ + do { + exec_stage = ipc_mmio_get_exec_stage(ipc_imem->mmio); + if (exec_stage == IPC_MEM_EXEC_STAGE_RUN || + exec_stage == IPC_MEM_EXEC_STAGE_PSI) + break; + msleep(20); + boot_check_timeout -= 20; + } while (boot_check_timeout > 0); + + /* If there are any pending TDs then wait for Timeout/Completion before + * closing pipe. + */ + if (channel->ul_pipe.old_tail != channel->ul_pipe.old_head) { + status = wait_for_completion_interruptible_timeout + (&ipc_imem->ul_pend_sem, + msecs_to_jiffies(IPC_PEND_DATA_TIMEOUT)); + if (status == 0) { + dev_dbg(ipc_imem->dev, + "Data Timeout on UL-Pipe:%d Head:%d Tail:%d", + channel->ul_pipe.pipe_nr, + channel->ul_pipe.old_head, + channel->ul_pipe.old_tail); + } + } + + ipc_protocol_get_head_tail_index(ipc_imem->ipc_protocol, + &channel->dl_pipe, NULL, &tail); + + if (tail != channel->dl_pipe.old_tail) { + status = wait_for_completion_interruptible_timeout + (&ipc_imem->dl_pend_sem, + msecs_to_jiffies(IPC_PEND_DATA_TIMEOUT)); + if (status == 0) { + dev_dbg(ipc_imem->dev, + "Data Timeout on DL-Pipe:%d Head:%d Tail:%d", + channel->dl_pipe.pipe_nr, + channel->dl_pipe.old_head, + channel->dl_pipe.old_tail); + } + } + + /* Due to wait for completion in messages, there is a small window + * between closing the pipe and updating the channel is closed. In this + * small window there could be HP update from Host Driver. Hence update + * the channel state as CLOSING to aviod unnecessary interrupt + * towards CP. + */ + channel->state = IMEM_CHANNEL_CLOSING; + /* Release the pipe resources */ + ipc_imem_pipe_cleanup(ipc_imem, &channel->ul_pipe); + ipc_imem_pipe_cleanup(ipc_imem, &channel->dl_pipe); + ipc_imem->nr_of_channels--; +} + +void ipc_imem_sys_devlink_notify_rx(struct iosm_devlink *ipc_devlink, + struct sk_buff *skb) +{ + skb_queue_tail(&ipc_devlink->devlink_sio.rx_list, skb); + complete(&ipc_devlink->devlink_sio.read_sem); +} + +/* PSI transfer */ +static int ipc_imem_sys_psi_transfer(struct iosm_imem *ipc_imem, + struct ipc_mem_channel *channel, + unsigned char *buf, int count) +{ + int psi_start_timeout = PSI_START_DEFAULT_TIMEOUT; + enum ipc_mem_exec_stage exec_stage; + + dma_addr_t mapping = 0; + int ret; + + ret = ipc_pcie_addr_map(ipc_imem->pcie, buf, count, &mapping, + DMA_TO_DEVICE); + if (ret) + goto pcie_addr_map_fail; + + /* Save the PSI information for the CP ROM driver on the doorbell + * scratchpad. + */ + ipc_mmio_set_psi_addr_and_size(ipc_imem->mmio, mapping, count); + ipc_doorbell_fire(ipc_imem->pcie, 0, IPC_MEM_EXEC_STAGE_BOOT); + + ret = wait_for_completion_interruptible_timeout + (&channel->ul_sem, + msecs_to_jiffies(IPC_PSI_TRANSFER_TIMEOUT)); + + if (ret <= 0) { + dev_err(ipc_imem->dev, "Failed PSI transfer to CP, Error-%d", + ret); + goto psi_transfer_fail; + } + /* If the PSI download fails, return the CP boot ROM exit code */ + if (ipc_imem->rom_exit_code != IMEM_ROM_EXIT_OPEN_EXT && + ipc_imem->rom_exit_code != IMEM_ROM_EXIT_CERT_EXT) { + ret = (-1) * ((int)ipc_imem->rom_exit_code); + goto psi_transfer_fail; + } + + dev_dbg(ipc_imem->dev, "PSI image successfully downloaded"); + + /* Wait psi_start_timeout milliseconds until the CP PSI image is + * running and updates the execution_stage field with + * IPC_MEM_EXEC_STAGE_PSI. Verify the execution stage. + */ + do { + exec_stage = ipc_mmio_get_exec_stage(ipc_imem->mmio); + + if (exec_stage == IPC_MEM_EXEC_STAGE_PSI) + break; + + msleep(20); + psi_start_timeout -= 20; + } while (psi_start_timeout > 0); + + if (exec_stage != IPC_MEM_EXEC_STAGE_PSI) + goto psi_transfer_fail; /* Unknown status of CP PSI process. */ + + ipc_imem->phase = IPC_P_PSI; + + /* Enter the PSI phase. */ + dev_dbg(ipc_imem->dev, "execution_stage[%X] eq. PSI", exec_stage); + + /* Request the RUNNING state from CP and wait until it was reached + * or timeout. + */ + ipc_imem_ipc_init_check(ipc_imem); + + ret = wait_for_completion_interruptible_timeout + (&channel->ul_sem, msecs_to_jiffies(IPC_PSI_TRANSFER_TIMEOUT)); + if (ret <= 0) { + dev_err(ipc_imem->dev, + "Failed PSI RUNNING state on CP, Error-%d", ret); + goto psi_transfer_fail; + } + + if (ipc_mmio_get_ipc_state(ipc_imem->mmio) != + IPC_MEM_DEVICE_IPC_RUNNING) { + dev_err(ipc_imem->dev, + "ch[%d] %s: unexpected CP IPC state %d, not RUNNING", + channel->channel_id, + ipc_imem_phase_get_string(ipc_imem->phase), + ipc_mmio_get_ipc_state(ipc_imem->mmio)); + + goto psi_transfer_fail; + } + + /* Create the flash channel for the transfer of the images. */ + if (!ipc_imem_sys_devlink_open(ipc_imem)) { + dev_err(ipc_imem->dev, "can't open flash_channel"); + goto psi_transfer_fail; + } + + ret = 0; +psi_transfer_fail: + ipc_pcie_addr_unmap(ipc_imem->pcie, count, mapping, DMA_TO_DEVICE); +pcie_addr_map_fail: + return ret; +} + +int ipc_imem_sys_devlink_write(struct iosm_devlink *ipc_devlink, + unsigned char *buf, int count) +{ + struct iosm_imem *ipc_imem = ipc_devlink->pcie->imem; + struct ipc_mem_channel *channel; + struct sk_buff *skb; + dma_addr_t mapping; + int ret; + + channel = ipc_imem->ipc_devlink->devlink_sio.channel; + + /* In the ROM phase the PSI image is passed to CP about a specific + * shared memory area and doorbell scratchpad directly. + */ + if (ipc_imem->phase == IPC_P_ROM) { + ret = ipc_imem_sys_psi_transfer(ipc_imem, channel, buf, count); + /* If the PSI transfer fails then send crash + * Signature. + */ + if (ret > 0) + ipc_imem_msg_send_feature_set(ipc_imem, + IPC_MEM_INBAND_CRASH_SIG, + false); + goto out; + } + + /* Allocate skb memory for the uplink buffer. */ + skb = ipc_pcie_alloc_skb(ipc_devlink->pcie, count, GFP_KERNEL, &mapping, + DMA_TO_DEVICE, 0); + if (!skb) { + ret = -ENOMEM; + goto out; + } + + skb_put_data(skb, buf, count); + + IPC_CB(skb)->op_type = UL_USR_OP_BLOCKED; + + /* Add skb to the uplink skbuf accumulator. */ + skb_queue_tail(&channel->ul_list, skb); + + /* Inform the IPC tasklet to pass uplink IP packets to CP. */ + if (!ipc_imem_call_cdev_write(ipc_imem)) { + ret = wait_for_completion_interruptible(&channel->ul_sem); + + if (ret < 0) { + dev_err(ipc_imem->dev, + "ch[%d] no CP confirmation, status = %d", + channel->channel_id, ret); + ipc_pcie_kfree_skb(ipc_devlink->pcie, skb); + goto out; + } + } + ret = 0; +out: + return ret; +} + +int ipc_imem_sys_devlink_read(struct iosm_devlink *devlink, u8 *data, + u32 bytes_to_read, u32 *bytes_read) +{ + struct sk_buff *skb = NULL; + int rc = 0; + + /* check skb is available in rx_list or wait for skb */ + devlink->devlink_sio.devlink_read_pend = 1; + while (!skb && !(skb = skb_dequeue(&devlink->devlink_sio.rx_list))) { + if (!wait_for_completion_interruptible_timeout + (&devlink->devlink_sio.read_sem, + msecs_to_jiffies(IPC_READ_TIMEOUT))) { + dev_err(devlink->dev, "Read timedout"); + rc = -ETIMEDOUT; + goto devlink_read_fail; + } + } + devlink->devlink_sio.devlink_read_pend = 0; + if (bytes_to_read < skb->len) { + dev_err(devlink->dev, "Invalid size,expected len %d", skb->len); + rc = -EINVAL; + goto devlink_read_fail; + } + *bytes_read = skb->len; + memcpy(data, skb->data, skb->len); + +devlink_read_fail: + dev_kfree_skb(skb); + return rc; +} -- cgit v1.2.3