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/wireless/mediatek/mt76/sdio.c | 671 ++++++++++++++++++++++++++++++ 1 file changed, 671 insertions(+) create mode 100644 drivers/net/wireless/mediatek/mt76/sdio.c (limited to 'drivers/net/wireless/mediatek/mt76/sdio.c') diff --git a/drivers/net/wireless/mediatek/mt76/sdio.c b/drivers/net/wireless/mediatek/mt76/sdio.c new file mode 100644 index 000000000..419723118 --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/sdio.c @@ -0,0 +1,671 @@ +// SPDX-License-Identifier: ISC +/* Copyright (C) 2020 MediaTek Inc. + * + * This file is written based on mt76/usb.c. + * + * Author: Felix Fietkau + * Lorenzo Bianconi + * Sean Wang + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "mt76.h" +#include "sdio.h" + +static u32 mt76s_read_whisr(struct mt76_dev *dev) +{ + return sdio_readl(dev->sdio.func, MCR_WHISR, NULL); +} + +u32 mt76s_read_pcr(struct mt76_dev *dev) +{ + struct mt76_sdio *sdio = &dev->sdio; + + return sdio_readl(sdio->func, MCR_WHLPCR, NULL); +} +EXPORT_SYMBOL_GPL(mt76s_read_pcr); + +static u32 mt76s_read_mailbox(struct mt76_dev *dev, u32 offset) +{ + struct sdio_func *func = dev->sdio.func; + u32 val = ~0, status; + int err; + + sdio_claim_host(func); + + sdio_writel(func, offset, MCR_H2DSM0R, &err); + if (err < 0) { + dev_err(dev->dev, "failed setting address [err=%d]\n", err); + goto out; + } + + sdio_writel(func, H2D_SW_INT_READ, MCR_WSICR, &err); + if (err < 0) { + dev_err(dev->dev, "failed setting read mode [err=%d]\n", err); + goto out; + } + + err = readx_poll_timeout(mt76s_read_whisr, dev, status, + status & H2D_SW_INT_READ, 0, 1000000); + if (err < 0) { + dev_err(dev->dev, "query whisr timeout\n"); + goto out; + } + + sdio_writel(func, H2D_SW_INT_READ, MCR_WHISR, &err); + if (err < 0) { + dev_err(dev->dev, "failed setting read mode [err=%d]\n", err); + goto out; + } + + val = sdio_readl(func, MCR_H2DSM0R, &err); + if (err < 0) { + dev_err(dev->dev, "failed reading h2dsm0r [err=%d]\n", err); + goto out; + } + + if (val != offset) { + dev_err(dev->dev, "register mismatch\n"); + val = ~0; + goto out; + } + + val = sdio_readl(func, MCR_D2HRM1R, &err); + if (err < 0) + dev_err(dev->dev, "failed reading d2hrm1r [err=%d]\n", err); + +out: + sdio_release_host(func); + + return val; +} + +static void mt76s_write_mailbox(struct mt76_dev *dev, u32 offset, u32 val) +{ + struct sdio_func *func = dev->sdio.func; + u32 status; + int err; + + sdio_claim_host(func); + + sdio_writel(func, offset, MCR_H2DSM0R, &err); + if (err < 0) { + dev_err(dev->dev, "failed setting address [err=%d]\n", err); + goto out; + } + + sdio_writel(func, val, MCR_H2DSM1R, &err); + if (err < 0) { + dev_err(dev->dev, + "failed setting write value [err=%d]\n", err); + goto out; + } + + sdio_writel(func, H2D_SW_INT_WRITE, MCR_WSICR, &err); + if (err < 0) { + dev_err(dev->dev, "failed setting write mode [err=%d]\n", err); + goto out; + } + + err = readx_poll_timeout(mt76s_read_whisr, dev, status, + status & H2D_SW_INT_WRITE, 0, 1000000); + if (err < 0) { + dev_err(dev->dev, "query whisr timeout\n"); + goto out; + } + + sdio_writel(func, H2D_SW_INT_WRITE, MCR_WHISR, &err); + if (err < 0) { + dev_err(dev->dev, "failed setting write mode [err=%d]\n", err); + goto out; + } + + val = sdio_readl(func, MCR_H2DSM0R, &err); + if (err < 0) { + dev_err(dev->dev, "failed reading h2dsm0r [err=%d]\n", err); + goto out; + } + + if (val != offset) + dev_err(dev->dev, "register mismatch\n"); + +out: + sdio_release_host(func); +} + +u32 mt76s_rr(struct mt76_dev *dev, u32 offset) +{ + if (test_bit(MT76_STATE_MCU_RUNNING, &dev->phy.state)) + return dev->mcu_ops->mcu_rr(dev, offset); + else + return mt76s_read_mailbox(dev, offset); +} +EXPORT_SYMBOL_GPL(mt76s_rr); + +void mt76s_wr(struct mt76_dev *dev, u32 offset, u32 val) +{ + if (test_bit(MT76_STATE_MCU_RUNNING, &dev->phy.state)) + dev->mcu_ops->mcu_wr(dev, offset, val); + else + mt76s_write_mailbox(dev, offset, val); +} +EXPORT_SYMBOL_GPL(mt76s_wr); + +u32 mt76s_rmw(struct mt76_dev *dev, u32 offset, u32 mask, u32 val) +{ + val |= mt76s_rr(dev, offset) & ~mask; + mt76s_wr(dev, offset, val); + + return val; +} +EXPORT_SYMBOL_GPL(mt76s_rmw); + +void mt76s_write_copy(struct mt76_dev *dev, u32 offset, + const void *data, int len) +{ + const u32 *val = data; + int i; + + for (i = 0; i < len / sizeof(u32); i++) { + mt76s_wr(dev, offset, val[i]); + offset += sizeof(u32); + } +} +EXPORT_SYMBOL_GPL(mt76s_write_copy); + +void mt76s_read_copy(struct mt76_dev *dev, u32 offset, + void *data, int len) +{ + u32 *val = data; + int i; + + for (i = 0; i < len / sizeof(u32); i++) { + val[i] = mt76s_rr(dev, offset); + offset += sizeof(u32); + } +} +EXPORT_SYMBOL_GPL(mt76s_read_copy); + +int mt76s_wr_rp(struct mt76_dev *dev, u32 base, + const struct mt76_reg_pair *data, + int len) +{ + int i; + + for (i = 0; i < len; i++) { + mt76s_wr(dev, data->reg, data->value); + data++; + } + + return 0; +} +EXPORT_SYMBOL_GPL(mt76s_wr_rp); + +int mt76s_rd_rp(struct mt76_dev *dev, u32 base, + struct mt76_reg_pair *data, int len) +{ + int i; + + for (i = 0; i < len; i++) { + data->value = mt76s_rr(dev, data->reg); + data++; + } + + return 0; +} +EXPORT_SYMBOL_GPL(mt76s_rd_rp); + +int mt76s_hw_init(struct mt76_dev *dev, struct sdio_func *func, int hw_ver) +{ + u32 status, ctrl; + int ret; + + dev->sdio.hw_ver = hw_ver; + + sdio_claim_host(func); + + ret = sdio_enable_func(func); + if (ret < 0) + goto release; + + /* Get ownership from the device */ + sdio_writel(func, WHLPCR_INT_EN_CLR | WHLPCR_FW_OWN_REQ_CLR, + MCR_WHLPCR, &ret); + if (ret < 0) + goto disable_func; + + ret = readx_poll_timeout(mt76s_read_pcr, dev, status, + status & WHLPCR_IS_DRIVER_OWN, 2000, 1000000); + if (ret < 0) { + dev_err(dev->dev, "Cannot get ownership from device"); + goto disable_func; + } + + ret = sdio_set_block_size(func, 512); + if (ret < 0) + goto disable_func; + + /* Enable interrupt */ + sdio_writel(func, WHLPCR_INT_EN_SET, MCR_WHLPCR, &ret); + if (ret < 0) + goto disable_func; + + ctrl = WHIER_RX0_DONE_INT_EN | WHIER_TX_DONE_INT_EN; + if (hw_ver == MT76_CONNAC2_SDIO) + ctrl |= WHIER_RX1_DONE_INT_EN; + sdio_writel(func, ctrl, MCR_WHIER, &ret); + if (ret < 0) + goto disable_func; + + switch (hw_ver) { + case MT76_CONNAC_SDIO: + /* set WHISR as read clear and Rx aggregation number as 16 */ + ctrl = FIELD_PREP(MAX_HIF_RX_LEN_NUM, 16); + break; + default: + ctrl = sdio_readl(func, MCR_WHCR, &ret); + if (ret < 0) + goto disable_func; + ctrl &= ~MAX_HIF_RX_LEN_NUM_CONNAC2; + ctrl &= ~W_INT_CLR_CTRL; /* read clear */ + ctrl |= FIELD_PREP(MAX_HIF_RX_LEN_NUM_CONNAC2, 0); + break; + } + + sdio_writel(func, ctrl, MCR_WHCR, &ret); + if (ret < 0) + goto disable_func; + + ret = sdio_claim_irq(func, mt76s_sdio_irq); + if (ret < 0) + goto disable_func; + + sdio_release_host(func); + + return 0; + +disable_func: + sdio_disable_func(func); +release: + sdio_release_host(func); + + return ret; +} +EXPORT_SYMBOL_GPL(mt76s_hw_init); + +int mt76s_alloc_rx_queue(struct mt76_dev *dev, enum mt76_rxq_id qid) +{ + struct mt76_queue *q = &dev->q_rx[qid]; + + spin_lock_init(&q->lock); + q->entry = devm_kcalloc(dev->dev, + MT76S_NUM_RX_ENTRIES, sizeof(*q->entry), + GFP_KERNEL); + if (!q->entry) + return -ENOMEM; + + q->ndesc = MT76S_NUM_RX_ENTRIES; + q->head = q->tail = 0; + q->queued = 0; + + return 0; +} +EXPORT_SYMBOL_GPL(mt76s_alloc_rx_queue); + +static struct mt76_queue *mt76s_alloc_tx_queue(struct mt76_dev *dev) +{ + struct mt76_queue *q; + + q = devm_kzalloc(dev->dev, sizeof(*q), GFP_KERNEL); + if (!q) + return ERR_PTR(-ENOMEM); + + spin_lock_init(&q->lock); + q->entry = devm_kcalloc(dev->dev, + MT76S_NUM_TX_ENTRIES, sizeof(*q->entry), + GFP_KERNEL); + if (!q->entry) + return ERR_PTR(-ENOMEM); + + q->ndesc = MT76S_NUM_TX_ENTRIES; + + return q; +} + +int mt76s_alloc_tx(struct mt76_dev *dev) +{ + struct mt76_queue *q; + int i; + + for (i = 0; i <= MT_TXQ_PSD; i++) { + q = mt76s_alloc_tx_queue(dev); + if (IS_ERR(q)) + return PTR_ERR(q); + + dev->phy.q_tx[i] = q; + } + + q = mt76s_alloc_tx_queue(dev); + if (IS_ERR(q)) + return PTR_ERR(q); + + dev->q_mcu[MT_MCUQ_WM] = q; + + return 0; +} +EXPORT_SYMBOL_GPL(mt76s_alloc_tx); + +static struct mt76_queue_entry * +mt76s_get_next_rx_entry(struct mt76_queue *q) +{ + struct mt76_queue_entry *e = NULL; + + spin_lock_bh(&q->lock); + if (q->queued > 0) { + e = &q->entry[q->tail]; + q->tail = (q->tail + 1) % q->ndesc; + q->queued--; + } + spin_unlock_bh(&q->lock); + + return e; +} + +static int +mt76s_process_rx_queue(struct mt76_dev *dev, struct mt76_queue *q) +{ + int qid = q - &dev->q_rx[MT_RXQ_MAIN]; + int nframes = 0; + + while (true) { + struct mt76_queue_entry *e; + + if (!test_bit(MT76_STATE_INITIALIZED, &dev->phy.state)) + break; + + e = mt76s_get_next_rx_entry(q); + if (!e || !e->skb) + break; + + dev->drv->rx_skb(dev, MT_RXQ_MAIN, e->skb, NULL); + e->skb = NULL; + nframes++; + } + if (qid == MT_RXQ_MAIN) + mt76_rx_poll_complete(dev, MT_RXQ_MAIN, NULL); + + return nframes; +} + +static void mt76s_net_worker(struct mt76_worker *w) +{ + struct mt76_sdio *sdio = container_of(w, struct mt76_sdio, + net_worker); + struct mt76_dev *dev = container_of(sdio, struct mt76_dev, sdio); + int i, nframes; + + do { + nframes = 0; + + local_bh_disable(); + rcu_read_lock(); + + mt76_for_each_q_rx(dev, i) + nframes += mt76s_process_rx_queue(dev, &dev->q_rx[i]); + + rcu_read_unlock(); + local_bh_enable(); + } while (nframes > 0); +} + +static int mt76s_process_tx_queue(struct mt76_dev *dev, struct mt76_queue *q) +{ + struct mt76_queue_entry entry; + int nframes = 0; + bool mcu; + + if (!q) + return 0; + + mcu = q == dev->q_mcu[MT_MCUQ_WM]; + while (q->queued > 0) { + if (!q->entry[q->tail].done) + break; + + entry = q->entry[q->tail]; + q->entry[q->tail].done = false; + + if (mcu) { + dev_kfree_skb(entry.skb); + entry.skb = NULL; + } + + mt76_queue_tx_complete(dev, q, &entry); + nframes++; + } + + if (!q->queued) + wake_up(&dev->tx_wait); + + return nframes; +} + +static void mt76s_status_worker(struct mt76_worker *w) +{ + struct mt76_sdio *sdio = container_of(w, struct mt76_sdio, + status_worker); + struct mt76_dev *dev = container_of(sdio, struct mt76_dev, sdio); + bool resched = false; + int i, nframes; + + do { + int ndata_frames = 0; + + nframes = mt76s_process_tx_queue(dev, dev->q_mcu[MT_MCUQ_WM]); + + for (i = 0; i <= MT_TXQ_PSD; i++) + ndata_frames += mt76s_process_tx_queue(dev, + dev->phy.q_tx[i]); + nframes += ndata_frames; + if (ndata_frames > 0) + resched = true; + + if (dev->drv->tx_status_data && ndata_frames > 0 && + !test_and_set_bit(MT76_READING_STATS, &dev->phy.state) && + !test_bit(MT76_STATE_SUSPEND, &dev->phy.state)) + ieee80211_queue_work(dev->hw, &dev->sdio.stat_work); + } while (nframes > 0); + + if (resched) + mt76_worker_schedule(&dev->tx_worker); +} + +static void mt76s_tx_status_data(struct work_struct *work) +{ + struct mt76_sdio *sdio; + struct mt76_dev *dev; + u8 update = 1; + u16 count = 0; + + sdio = container_of(work, struct mt76_sdio, stat_work); + dev = container_of(sdio, struct mt76_dev, sdio); + + while (true) { + if (test_bit(MT76_REMOVED, &dev->phy.state)) + break; + + if (!dev->drv->tx_status_data(dev, &update)) + break; + count++; + } + + if (count && test_bit(MT76_STATE_RUNNING, &dev->phy.state)) + ieee80211_queue_work(dev->hw, &sdio->stat_work); + else + clear_bit(MT76_READING_STATS, &dev->phy.state); +} + +static int +mt76s_tx_queue_skb(struct mt76_dev *dev, struct mt76_queue *q, + enum mt76_txq_id qid, struct sk_buff *skb, + struct mt76_wcid *wcid, struct ieee80211_sta *sta) +{ + struct mt76_tx_info tx_info = { + .skb = skb, + }; + int err, len = skb->len; + u16 idx = q->head; + + if (q->queued == q->ndesc) + return -ENOSPC; + + skb->prev = skb->next = NULL; + err = dev->drv->tx_prepare_skb(dev, NULL, qid, wcid, sta, &tx_info); + if (err < 0) + return err; + + q->entry[q->head].skb = tx_info.skb; + q->entry[q->head].buf_sz = len; + q->entry[q->head].wcid = 0xffff; + + smp_wmb(); + + q->head = (q->head + 1) % q->ndesc; + q->queued++; + + return idx; +} + +static int +mt76s_tx_queue_skb_raw(struct mt76_dev *dev, struct mt76_queue *q, + struct sk_buff *skb, u32 tx_info) +{ + int ret = -ENOSPC, len = skb->len, pad; + + if (q->queued == q->ndesc) + goto error; + + pad = round_up(skb->len, 4) - skb->len; + ret = mt76_skb_adjust_pad(skb, pad); + if (ret) + goto error; + + spin_lock_bh(&q->lock); + + q->entry[q->head].buf_sz = len; + q->entry[q->head].skb = skb; + + /* ensure the entry fully updated before bus access */ + smp_wmb(); + + q->head = (q->head + 1) % q->ndesc; + q->queued++; + + spin_unlock_bh(&q->lock); + + return 0; + +error: + dev_kfree_skb(skb); + + return ret; +} + +static void mt76s_tx_kick(struct mt76_dev *dev, struct mt76_queue *q) +{ + struct mt76_sdio *sdio = &dev->sdio; + + mt76_worker_schedule(&sdio->txrx_worker); +} + +static const struct mt76_queue_ops sdio_queue_ops = { + .tx_queue_skb = mt76s_tx_queue_skb, + .kick = mt76s_tx_kick, + .tx_queue_skb_raw = mt76s_tx_queue_skb_raw, +}; + +void mt76s_deinit(struct mt76_dev *dev) +{ + struct mt76_sdio *sdio = &dev->sdio; + int i; + + mt76_worker_teardown(&sdio->txrx_worker); + mt76_worker_teardown(&sdio->status_worker); + mt76_worker_teardown(&sdio->net_worker); + + cancel_work_sync(&sdio->stat_work); + clear_bit(MT76_READING_STATS, &dev->phy.state); + + mt76_tx_status_check(dev, true); + + sdio_claim_host(sdio->func); + sdio_release_irq(sdio->func); + sdio_release_host(sdio->func); + + mt76_for_each_q_rx(dev, i) { + struct mt76_queue *q = &dev->q_rx[i]; + int j; + + for (j = 0; j < q->ndesc; j++) { + struct mt76_queue_entry *e = &q->entry[j]; + + if (!e->skb) + continue; + + dev_kfree_skb(e->skb); + e->skb = NULL; + } + } +} +EXPORT_SYMBOL_GPL(mt76s_deinit); + +int mt76s_init(struct mt76_dev *dev, struct sdio_func *func, + const struct mt76_bus_ops *bus_ops) +{ + struct mt76_sdio *sdio = &dev->sdio; + u32 host_max_cap; + int err; + + err = mt76_worker_setup(dev->hw, &sdio->status_worker, + mt76s_status_worker, "sdio-status"); + if (err) + return err; + + err = mt76_worker_setup(dev->hw, &sdio->net_worker, mt76s_net_worker, + "sdio-net"); + if (err) + return err; + + sched_set_fifo_low(sdio->status_worker.task); + sched_set_fifo_low(sdio->net_worker.task); + + INIT_WORK(&sdio->stat_work, mt76s_tx_status_data); + + dev->queue_ops = &sdio_queue_ops; + dev->bus = bus_ops; + dev->sdio.func = func; + + host_max_cap = min_t(u32, func->card->host->max_req_size, + func->cur_blksize * + func->card->host->max_blk_count); + dev->sdio.xmit_buf_sz = min_t(u32, host_max_cap, MT76S_XMIT_BUF_SZ); + dev->sdio.xmit_buf = devm_kmalloc(dev->dev, dev->sdio.xmit_buf_sz, + GFP_KERNEL); + if (!dev->sdio.xmit_buf) + err = -ENOMEM; + + return err; +} +EXPORT_SYMBOL_GPL(mt76s_init); + +MODULE_AUTHOR("Sean Wang "); +MODULE_AUTHOR("Lorenzo Bianconi "); +MODULE_LICENSE("Dual BSD/GPL"); -- cgit v1.2.3