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/ipack/carriers/tpci200.c | 650 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 650 insertions(+) create mode 100644 drivers/ipack/carriers/tpci200.c (limited to 'drivers/ipack/carriers/tpci200.c') diff --git a/drivers/ipack/carriers/tpci200.c b/drivers/ipack/carriers/tpci200.c new file mode 100644 index 000000000..cbfdadecb --- /dev/null +++ b/drivers/ipack/carriers/tpci200.c @@ -0,0 +1,650 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * driver for the TEWS TPCI-200 device + * + * Copyright (C) 2009-2012 CERN (www.cern.ch) + * Author: Nicolas Serafini, EIC2 SA + * Author: Samuel Iglesias Gonsalvez + */ + +#include +#include +#include "tpci200.h" + +static const u16 tpci200_status_timeout[] = { + TPCI200_A_TIMEOUT, + TPCI200_B_TIMEOUT, + TPCI200_C_TIMEOUT, + TPCI200_D_TIMEOUT, +}; + +static const u16 tpci200_status_error[] = { + TPCI200_A_ERROR, + TPCI200_B_ERROR, + TPCI200_C_ERROR, + TPCI200_D_ERROR, +}; + +static const size_t tpci200_space_size[IPACK_SPACE_COUNT] = { + [IPACK_IO_SPACE] = TPCI200_IO_SPACE_SIZE, + [IPACK_ID_SPACE] = TPCI200_ID_SPACE_SIZE, + [IPACK_INT_SPACE] = TPCI200_INT_SPACE_SIZE, + [IPACK_MEM8_SPACE] = TPCI200_MEM8_SPACE_SIZE, + [IPACK_MEM16_SPACE] = TPCI200_MEM16_SPACE_SIZE, +}; + +static const size_t tpci200_space_interval[IPACK_SPACE_COUNT] = { + [IPACK_IO_SPACE] = TPCI200_IO_SPACE_INTERVAL, + [IPACK_ID_SPACE] = TPCI200_ID_SPACE_INTERVAL, + [IPACK_INT_SPACE] = TPCI200_INT_SPACE_INTERVAL, + [IPACK_MEM8_SPACE] = TPCI200_MEM8_SPACE_INTERVAL, + [IPACK_MEM16_SPACE] = TPCI200_MEM16_SPACE_INTERVAL, +}; + +static struct tpci200_board *check_slot(struct ipack_device *dev) +{ + struct tpci200_board *tpci200; + + if (dev == NULL) + return NULL; + + + tpci200 = dev_get_drvdata(dev->bus->parent); + + if (tpci200 == NULL) { + dev_info(&dev->dev, "carrier board not found\n"); + return NULL; + } + + if (dev->slot >= TPCI200_NB_SLOT) { + dev_info(&dev->dev, + "Slot [%d:%d] doesn't exist! Last tpci200 slot is %d.\n", + dev->bus->bus_nr, dev->slot, TPCI200_NB_SLOT-1); + return NULL; + } + + return tpci200; +} + +static void tpci200_clear_mask(struct tpci200_board *tpci200, + __le16 __iomem *addr, u16 mask) +{ + unsigned long flags; + spin_lock_irqsave(&tpci200->regs_lock, flags); + iowrite16(ioread16(addr) & (~mask), addr); + spin_unlock_irqrestore(&tpci200->regs_lock, flags); +} + +static void tpci200_set_mask(struct tpci200_board *tpci200, + __le16 __iomem *addr, u16 mask) +{ + unsigned long flags; + spin_lock_irqsave(&tpci200->regs_lock, flags); + iowrite16(ioread16(addr) | mask, addr); + spin_unlock_irqrestore(&tpci200->regs_lock, flags); +} + +static void tpci200_unregister(struct tpci200_board *tpci200) +{ + free_irq(tpci200->info->pdev->irq, (void *) tpci200); + + pci_iounmap(tpci200->info->pdev, tpci200->info->interface_regs); + + pci_release_region(tpci200->info->pdev, TPCI200_IP_INTERFACE_BAR); + pci_release_region(tpci200->info->pdev, TPCI200_IO_ID_INT_SPACES_BAR); + pci_release_region(tpci200->info->pdev, TPCI200_MEM16_SPACE_BAR); + pci_release_region(tpci200->info->pdev, TPCI200_MEM8_SPACE_BAR); + + pci_disable_device(tpci200->info->pdev); +} + +static void tpci200_enable_irq(struct tpci200_board *tpci200, + int islot) +{ + tpci200_set_mask(tpci200, + &tpci200->info->interface_regs->control[islot], + TPCI200_INT0_EN | TPCI200_INT1_EN); +} + +static void tpci200_disable_irq(struct tpci200_board *tpci200, + int islot) +{ + tpci200_clear_mask(tpci200, + &tpci200->info->interface_regs->control[islot], + TPCI200_INT0_EN | TPCI200_INT1_EN); +} + +static irqreturn_t tpci200_slot_irq(struct slot_irq *slot_irq) +{ + irqreturn_t ret; + + if (!slot_irq) + return -ENODEV; + ret = slot_irq->handler(slot_irq->arg); + + return ret; +} + +static irqreturn_t tpci200_interrupt(int irq, void *dev_id) +{ + struct tpci200_board *tpci200 = (struct tpci200_board *) dev_id; + struct slot_irq *slot_irq; + irqreturn_t ret; + u16 status_reg; + int i; + + /* Read status register */ + status_reg = ioread16(&tpci200->info->interface_regs->status); + + /* Did we cause the interrupt? */ + if (!(status_reg & TPCI200_SLOT_INT_MASK)) + return IRQ_NONE; + + /* callback to the IRQ handler for the corresponding slot */ + rcu_read_lock(); + for (i = 0; i < TPCI200_NB_SLOT; i++) { + if (!(status_reg & ((TPCI200_A_INT0 | TPCI200_A_INT1) << (2 * i)))) + continue; + slot_irq = rcu_dereference(tpci200->slots[i].irq); + ret = tpci200_slot_irq(slot_irq); + if (ret == -ENODEV) { + dev_info(&tpci200->info->pdev->dev, + "No registered ISR for slot [%d:%d]!. IRQ will be disabled.\n", + tpci200->number, i); + tpci200_disable_irq(tpci200, i); + } + } + rcu_read_unlock(); + + return IRQ_HANDLED; +} + +static int tpci200_free_irq(struct ipack_device *dev) +{ + struct slot_irq *slot_irq; + struct tpci200_board *tpci200; + + tpci200 = check_slot(dev); + if (tpci200 == NULL) + return -EINVAL; + + if (mutex_lock_interruptible(&tpci200->mutex)) + return -ERESTARTSYS; + + if (tpci200->slots[dev->slot].irq == NULL) { + mutex_unlock(&tpci200->mutex); + return -EINVAL; + } + + tpci200_disable_irq(tpci200, dev->slot); + slot_irq = tpci200->slots[dev->slot].irq; + /* uninstall handler */ + RCU_INIT_POINTER(tpci200->slots[dev->slot].irq, NULL); + synchronize_rcu(); + kfree(slot_irq); + mutex_unlock(&tpci200->mutex); + return 0; +} + +static int tpci200_request_irq(struct ipack_device *dev, + irqreturn_t (*handler)(void *), void *arg) +{ + int res = 0; + struct slot_irq *slot_irq; + struct tpci200_board *tpci200; + + tpci200 = check_slot(dev); + if (tpci200 == NULL) + return -EINVAL; + + if (mutex_lock_interruptible(&tpci200->mutex)) + return -ERESTARTSYS; + + if (tpci200->slots[dev->slot].irq != NULL) { + dev_err(&dev->dev, + "Slot [%d:%d] IRQ already registered !\n", + dev->bus->bus_nr, + dev->slot); + res = -EINVAL; + goto out_unlock; + } + + slot_irq = kzalloc(sizeof(struct slot_irq), GFP_KERNEL); + if (slot_irq == NULL) { + dev_err(&dev->dev, + "Slot [%d:%d] unable to allocate memory for IRQ !\n", + dev->bus->bus_nr, dev->slot); + res = -ENOMEM; + goto out_unlock; + } + + /* + * WARNING: Setup Interrupt Vector in the IndustryPack device + * before an IRQ request. + * Read the User Manual of your IndustryPack device to know + * where to write the vector in memory. + */ + slot_irq->handler = handler; + slot_irq->arg = arg; + slot_irq->holder = dev; + + rcu_assign_pointer(tpci200->slots[dev->slot].irq, slot_irq); + tpci200_enable_irq(tpci200, dev->slot); + +out_unlock: + mutex_unlock(&tpci200->mutex); + return res; +} + +static int tpci200_register(struct tpci200_board *tpci200) +{ + int i; + int res; + phys_addr_t ioidint_base; + unsigned short slot_ctrl; + + if (pci_enable_device(tpci200->info->pdev) < 0) + return -ENODEV; + + /* Request IP interface register (Bar 2) */ + res = pci_request_region(tpci200->info->pdev, TPCI200_IP_INTERFACE_BAR, + "Carrier IP interface registers"); + if (res) { + dev_err(&tpci200->info->pdev->dev, + "(bn 0x%X, sn 0x%X) failed to allocate PCI resource for BAR 2 !", + tpci200->info->pdev->bus->number, + tpci200->info->pdev->devfn); + goto err_disable_device; + } + + /* Request IO ID INT space (Bar 3) */ + res = pci_request_region(tpci200->info->pdev, + TPCI200_IO_ID_INT_SPACES_BAR, + "Carrier IO ID INT space"); + if (res) { + dev_err(&tpci200->info->pdev->dev, + "(bn 0x%X, sn 0x%X) failed to allocate PCI resource for BAR 3 !", + tpci200->info->pdev->bus->number, + tpci200->info->pdev->devfn); + goto err_ip_interface_bar; + } + + /* Request MEM8 space (Bar 5) */ + res = pci_request_region(tpci200->info->pdev, TPCI200_MEM8_SPACE_BAR, + "Carrier MEM8 space"); + if (res) { + dev_err(&tpci200->info->pdev->dev, + "(bn 0x%X, sn 0x%X) failed to allocate PCI resource for BAR 5!", + tpci200->info->pdev->bus->number, + tpci200->info->pdev->devfn); + goto err_io_id_int_spaces_bar; + } + + /* Request MEM16 space (Bar 4) */ + res = pci_request_region(tpci200->info->pdev, TPCI200_MEM16_SPACE_BAR, + "Carrier MEM16 space"); + if (res) { + dev_err(&tpci200->info->pdev->dev, + "(bn 0x%X, sn 0x%X) failed to allocate PCI resource for BAR 4!", + tpci200->info->pdev->bus->number, + tpci200->info->pdev->devfn); + goto err_mem8_space_bar; + } + + /* Map internal tpci200 driver user space */ + tpci200->info->interface_regs = + ioremap(pci_resource_start(tpci200->info->pdev, + TPCI200_IP_INTERFACE_BAR), + TPCI200_IFACE_SIZE); + if (!tpci200->info->interface_regs) { + dev_err(&tpci200->info->pdev->dev, + "(bn 0x%X, sn 0x%X) failed to map driver user space!", + tpci200->info->pdev->bus->number, + tpci200->info->pdev->devfn); + res = -ENOMEM; + goto err_mem16_space_bar; + } + + /* Initialize lock that protects interface_regs */ + spin_lock_init(&tpci200->regs_lock); + + ioidint_base = pci_resource_start(tpci200->info->pdev, + TPCI200_IO_ID_INT_SPACES_BAR); + tpci200->mod_mem[IPACK_IO_SPACE] = ioidint_base + TPCI200_IO_SPACE_OFF; + tpci200->mod_mem[IPACK_ID_SPACE] = ioidint_base + TPCI200_ID_SPACE_OFF; + tpci200->mod_mem[IPACK_INT_SPACE] = + ioidint_base + TPCI200_INT_SPACE_OFF; + tpci200->mod_mem[IPACK_MEM8_SPACE] = + pci_resource_start(tpci200->info->pdev, + TPCI200_MEM8_SPACE_BAR); + tpci200->mod_mem[IPACK_MEM16_SPACE] = + pci_resource_start(tpci200->info->pdev, + TPCI200_MEM16_SPACE_BAR); + + /* Set the default parameters of the slot + * INT0 disabled, level sensitive + * INT1 disabled, level sensitive + * error interrupt disabled + * timeout interrupt disabled + * recover time disabled + * clock rate 8 MHz + */ + slot_ctrl = 0; + for (i = 0; i < TPCI200_NB_SLOT; i++) + writew(slot_ctrl, &tpci200->info->interface_regs->control[i]); + + res = request_irq(tpci200->info->pdev->irq, + tpci200_interrupt, IRQF_SHARED, + KBUILD_MODNAME, (void *) tpci200); + if (res) { + dev_err(&tpci200->info->pdev->dev, + "(bn 0x%X, sn 0x%X) unable to register IRQ !", + tpci200->info->pdev->bus->number, + tpci200->info->pdev->devfn); + goto err_interface_regs; + } + + return 0; + +err_interface_regs: + pci_iounmap(tpci200->info->pdev, tpci200->info->interface_regs); +err_mem16_space_bar: + pci_release_region(tpci200->info->pdev, TPCI200_MEM16_SPACE_BAR); +err_mem8_space_bar: + pci_release_region(tpci200->info->pdev, TPCI200_MEM8_SPACE_BAR); +err_io_id_int_spaces_bar: + pci_release_region(tpci200->info->pdev, TPCI200_IO_ID_INT_SPACES_BAR); +err_ip_interface_bar: + pci_release_region(tpci200->info->pdev, TPCI200_IP_INTERFACE_BAR); +err_disable_device: + pci_disable_device(tpci200->info->pdev); + return res; +} + +static int tpci200_get_clockrate(struct ipack_device *dev) +{ + struct tpci200_board *tpci200 = check_slot(dev); + __le16 __iomem *addr; + + if (!tpci200) + return -ENODEV; + + addr = &tpci200->info->interface_regs->control[dev->slot]; + return (ioread16(addr) & TPCI200_CLK32) ? 32 : 8; +} + +static int tpci200_set_clockrate(struct ipack_device *dev, int mherz) +{ + struct tpci200_board *tpci200 = check_slot(dev); + __le16 __iomem *addr; + + if (!tpci200) + return -ENODEV; + + addr = &tpci200->info->interface_regs->control[dev->slot]; + + switch (mherz) { + case 8: + tpci200_clear_mask(tpci200, addr, TPCI200_CLK32); + break; + case 32: + tpci200_set_mask(tpci200, addr, TPCI200_CLK32); + break; + default: + return -EINVAL; + } + return 0; +} + +static int tpci200_get_error(struct ipack_device *dev) +{ + struct tpci200_board *tpci200 = check_slot(dev); + __le16 __iomem *addr; + u16 mask; + + if (!tpci200) + return -ENODEV; + + addr = &tpci200->info->interface_regs->status; + mask = tpci200_status_error[dev->slot]; + return (ioread16(addr) & mask) ? 1 : 0; +} + +static int tpci200_get_timeout(struct ipack_device *dev) +{ + struct tpci200_board *tpci200 = check_slot(dev); + __le16 __iomem *addr; + u16 mask; + + if (!tpci200) + return -ENODEV; + + addr = &tpci200->info->interface_regs->status; + mask = tpci200_status_timeout[dev->slot]; + + return (ioread16(addr) & mask) ? 1 : 0; +} + +static int tpci200_reset_timeout(struct ipack_device *dev) +{ + struct tpci200_board *tpci200 = check_slot(dev); + __le16 __iomem *addr; + u16 mask; + + if (!tpci200) + return -ENODEV; + + addr = &tpci200->info->interface_regs->status; + mask = tpci200_status_timeout[dev->slot]; + + iowrite16(mask, addr); + return 0; +} + +static void tpci200_uninstall(struct tpci200_board *tpci200) +{ + tpci200_unregister(tpci200); + kfree(tpci200->slots); +} + +static const struct ipack_bus_ops tpci200_bus_ops = { + .request_irq = tpci200_request_irq, + .free_irq = tpci200_free_irq, + .get_clockrate = tpci200_get_clockrate, + .set_clockrate = tpci200_set_clockrate, + .get_error = tpci200_get_error, + .get_timeout = tpci200_get_timeout, + .reset_timeout = tpci200_reset_timeout, +}; + +static int tpci200_install(struct tpci200_board *tpci200) +{ + int res; + + tpci200->slots = kcalloc(TPCI200_NB_SLOT, sizeof(struct tpci200_slot), + GFP_KERNEL); + if (tpci200->slots == NULL) + return -ENOMEM; + + res = tpci200_register(tpci200); + if (res) { + kfree(tpci200->slots); + tpci200->slots = NULL; + return res; + } + + mutex_init(&tpci200->mutex); + return 0; +} + +static void tpci200_release_device(struct ipack_device *dev) +{ + kfree(dev); +} + +static int tpci200_create_device(struct tpci200_board *tpci200, int i) +{ + int ret; + enum ipack_space space; + struct ipack_device *dev = + kzalloc(sizeof(struct ipack_device), GFP_KERNEL); + if (!dev) + return -ENOMEM; + dev->slot = i; + dev->bus = tpci200->info->ipack_bus; + dev->release = tpci200_release_device; + + for (space = 0; space < IPACK_SPACE_COUNT; space++) { + dev->region[space].start = + tpci200->mod_mem[space] + + tpci200_space_interval[space] * i; + dev->region[space].size = tpci200_space_size[space]; + } + + ret = ipack_device_init(dev); + if (ret < 0) { + ipack_put_device(dev); + return ret; + } + + ret = ipack_device_add(dev); + if (ret < 0) + ipack_put_device(dev); + + return ret; +} + +static int tpci200_pci_probe(struct pci_dev *pdev, + const struct pci_device_id *id) +{ + int ret, i; + struct tpci200_board *tpci200; + u32 reg32; + + tpci200 = kzalloc(sizeof(struct tpci200_board), GFP_KERNEL); + if (!tpci200) + return -ENOMEM; + + tpci200->info = kzalloc(sizeof(struct tpci200_infos), GFP_KERNEL); + if (!tpci200->info) { + ret = -ENOMEM; + goto err_tpci200; + } + + pci_dev_get(pdev); + + /* Obtain a mapping of the carrier's PCI configuration registers */ + ret = pci_request_region(pdev, TPCI200_CFG_MEM_BAR, + KBUILD_MODNAME " Configuration Memory"); + if (ret) { + dev_err(&pdev->dev, "Failed to allocate PCI Configuration Memory"); + ret = -EBUSY; + goto err_tpci200_info; + } + tpci200->info->cfg_regs = ioremap( + pci_resource_start(pdev, TPCI200_CFG_MEM_BAR), + pci_resource_len(pdev, TPCI200_CFG_MEM_BAR)); + if (!tpci200->info->cfg_regs) { + dev_err(&pdev->dev, "Failed to map PCI Configuration Memory"); + ret = -EFAULT; + goto err_request_region; + } + + /* Disable byte swapping for 16 bit IP module access. This will ensure + * that the Industrypack big endian byte order is preserved by the + * carrier. */ + reg32 = ioread32(tpci200->info->cfg_regs + LAS1_DESC); + reg32 |= 1 << LAS_BIT_BIGENDIAN; + iowrite32(reg32, tpci200->info->cfg_regs + LAS1_DESC); + + reg32 = ioread32(tpci200->info->cfg_regs + LAS2_DESC); + reg32 |= 1 << LAS_BIT_BIGENDIAN; + iowrite32(reg32, tpci200->info->cfg_regs + LAS2_DESC); + + /* Save struct pci_dev pointer */ + tpci200->info->pdev = pdev; + tpci200->info->id_table = (struct pci_device_id *)id; + + /* register the device and initialize it */ + ret = tpci200_install(tpci200); + if (ret) { + dev_err(&pdev->dev, "error during tpci200 install\n"); + ret = -ENODEV; + goto err_cfg_regs; + } + + /* Register the carrier in the industry pack bus driver */ + tpci200->info->ipack_bus = ipack_bus_register(&pdev->dev, + TPCI200_NB_SLOT, + &tpci200_bus_ops, + THIS_MODULE); + if (!tpci200->info->ipack_bus) { + dev_err(&pdev->dev, + "error registering the carrier on ipack driver\n"); + ret = -EFAULT; + goto err_tpci200_install; + } + + /* save the bus number given by ipack to logging purpose */ + tpci200->number = tpci200->info->ipack_bus->bus_nr; + dev_set_drvdata(&pdev->dev, tpci200); + + for (i = 0; i < TPCI200_NB_SLOT; i++) + tpci200_create_device(tpci200, i); + return 0; + +err_tpci200_install: + tpci200_uninstall(tpci200); +err_cfg_regs: + pci_iounmap(tpci200->info->pdev, tpci200->info->cfg_regs); +err_request_region: + pci_release_region(pdev, TPCI200_CFG_MEM_BAR); +err_tpci200_info: + kfree(tpci200->info); + pci_dev_put(pdev); +err_tpci200: + kfree(tpci200); + return ret; +} + +static void __tpci200_pci_remove(struct tpci200_board *tpci200) +{ + ipack_bus_unregister(tpci200->info->ipack_bus); + tpci200_uninstall(tpci200); + + pci_iounmap(tpci200->info->pdev, tpci200->info->cfg_regs); + + pci_release_region(tpci200->info->pdev, TPCI200_CFG_MEM_BAR); + + pci_dev_put(tpci200->info->pdev); + + kfree(tpci200->info); + kfree(tpci200); +} + +static void tpci200_pci_remove(struct pci_dev *dev) +{ + struct tpci200_board *tpci200 = pci_get_drvdata(dev); + + __tpci200_pci_remove(tpci200); +} + +static const struct pci_device_id tpci200_idtable[] = { + { TPCI200_VENDOR_ID, TPCI200_DEVICE_ID, TPCI200_SUBVENDOR_ID, + TPCI200_SUBDEVICE_ID }, + { 0, }, +}; + +MODULE_DEVICE_TABLE(pci, tpci200_idtable); + +static struct pci_driver tpci200_pci_drv = { + .name = "tpci200", + .id_table = tpci200_idtable, + .probe = tpci200_pci_probe, + .remove = tpci200_pci_remove, +}; + +module_pci_driver(tpci200_pci_drv); + +MODULE_DESCRIPTION("TEWS TPCI-200 device driver"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3