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/ethernet/brocade/bna/bnad_debugfs.c | 566 ++++++++++++++++++++++++ 1 file changed, 566 insertions(+) create mode 100644 drivers/net/ethernet/brocade/bna/bnad_debugfs.c (limited to 'drivers/net/ethernet/brocade/bna/bnad_debugfs.c') diff --git a/drivers/net/ethernet/brocade/bna/bnad_debugfs.c b/drivers/net/ethernet/brocade/bna/bnad_debugfs.c new file mode 100644 index 000000000..04ad0f2b9 --- /dev/null +++ b/drivers/net/ethernet/brocade/bna/bnad_debugfs.c @@ -0,0 +1,566 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Linux network driver for QLogic BR-series Converged Network Adapter. + */ +/* + * Copyright (c) 2005-2014 Brocade Communications Systems, Inc. + * Copyright (c) 2014-2015 QLogic Corporation + * All rights reserved + * www.qlogic.com + */ + +#include +#include +#include "bnad.h" + +/* + * BNA debufs interface + * + * To access the interface, debugfs file system should be mounted + * if not already mounted using: + * mount -t debugfs none /sys/kernel/debug + * + * BNA Hierarchy: + * - bna/pci_dev: + * where the pci_name corresponds to the one under /sys/bus/pci/drivers/bna + * + * Debugging service available per pci_dev: + * fwtrc: To collect current firmware trace. + * fwsave: To collect last saved fw trace as a result of firmware crash. + * regwr: To write one word to chip register + * regrd: To read one or more words from chip register. + */ + +struct bnad_debug_info { + char *debug_buffer; + void *i_private; + int buffer_len; +}; + +static int +bnad_debugfs_open_fwtrc(struct inode *inode, struct file *file) +{ + struct bnad *bnad = inode->i_private; + struct bnad_debug_info *fw_debug; + unsigned long flags; + int rc; + + fw_debug = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL); + if (!fw_debug) + return -ENOMEM; + + fw_debug->buffer_len = BNA_DBG_FWTRC_LEN; + + fw_debug->debug_buffer = kzalloc(fw_debug->buffer_len, GFP_KERNEL); + if (!fw_debug->debug_buffer) { + kfree(fw_debug); + fw_debug = NULL; + return -ENOMEM; + } + + spin_lock_irqsave(&bnad->bna_lock, flags); + rc = bfa_nw_ioc_debug_fwtrc(&bnad->bna.ioceth.ioc, + fw_debug->debug_buffer, + &fw_debug->buffer_len); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + if (rc != BFA_STATUS_OK) { + kfree(fw_debug->debug_buffer); + fw_debug->debug_buffer = NULL; + kfree(fw_debug); + fw_debug = NULL; + netdev_warn(bnad->netdev, "failed to collect fwtrc\n"); + return -ENOMEM; + } + + file->private_data = fw_debug; + + return 0; +} + +static int +bnad_debugfs_open_fwsave(struct inode *inode, struct file *file) +{ + struct bnad *bnad = inode->i_private; + struct bnad_debug_info *fw_debug; + unsigned long flags; + int rc; + + fw_debug = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL); + if (!fw_debug) + return -ENOMEM; + + fw_debug->buffer_len = BNA_DBG_FWTRC_LEN; + + fw_debug->debug_buffer = kzalloc(fw_debug->buffer_len, GFP_KERNEL); + if (!fw_debug->debug_buffer) { + kfree(fw_debug); + fw_debug = NULL; + return -ENOMEM; + } + + spin_lock_irqsave(&bnad->bna_lock, flags); + rc = bfa_nw_ioc_debug_fwsave(&bnad->bna.ioceth.ioc, + fw_debug->debug_buffer, + &fw_debug->buffer_len); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + if (rc != BFA_STATUS_OK && rc != BFA_STATUS_ENOFSAVE) { + kfree(fw_debug->debug_buffer); + fw_debug->debug_buffer = NULL; + kfree(fw_debug); + fw_debug = NULL; + netdev_warn(bnad->netdev, "failed to collect fwsave\n"); + return -ENOMEM; + } + + file->private_data = fw_debug; + + return 0; +} + +static int +bnad_debugfs_open_reg(struct inode *inode, struct file *file) +{ + struct bnad_debug_info *reg_debug; + + reg_debug = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL); + if (!reg_debug) + return -ENOMEM; + + reg_debug->i_private = inode->i_private; + + file->private_data = reg_debug; + + return 0; +} + +static int +bnad_get_debug_drvinfo(struct bnad *bnad, void *buffer, u32 len) +{ + struct bnad_drvinfo *drvinfo = (struct bnad_drvinfo *) buffer; + struct bnad_iocmd_comp fcomp; + unsigned long flags = 0; + int ret = BFA_STATUS_FAILED; + + /* Get IOC info */ + spin_lock_irqsave(&bnad->bna_lock, flags); + bfa_nw_ioc_get_attr(&bnad->bna.ioceth.ioc, &drvinfo->ioc_attr); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + /* Retrieve CEE related info */ + fcomp.bnad = bnad; + fcomp.comp_status = 0; + init_completion(&fcomp.comp); + spin_lock_irqsave(&bnad->bna_lock, flags); + ret = bfa_nw_cee_get_attr(&bnad->bna.cee, &drvinfo->cee_attr, + bnad_cb_completion, &fcomp); + if (ret != BFA_STATUS_OK) { + spin_unlock_irqrestore(&bnad->bna_lock, flags); + goto out; + } + spin_unlock_irqrestore(&bnad->bna_lock, flags); + wait_for_completion(&fcomp.comp); + drvinfo->cee_status = fcomp.comp_status; + + /* Retrieve flash partition info */ + fcomp.comp_status = 0; + reinit_completion(&fcomp.comp); + spin_lock_irqsave(&bnad->bna_lock, flags); + ret = bfa_nw_flash_get_attr(&bnad->bna.flash, &drvinfo->flash_attr, + bnad_cb_completion, &fcomp); + if (ret != BFA_STATUS_OK) { + spin_unlock_irqrestore(&bnad->bna_lock, flags); + goto out; + } + spin_unlock_irqrestore(&bnad->bna_lock, flags); + wait_for_completion(&fcomp.comp); + drvinfo->flash_status = fcomp.comp_status; +out: + return ret; +} + +static int +bnad_debugfs_open_drvinfo(struct inode *inode, struct file *file) +{ + struct bnad *bnad = inode->i_private; + struct bnad_debug_info *drv_info; + int rc; + + drv_info = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL); + if (!drv_info) + return -ENOMEM; + + drv_info->buffer_len = sizeof(struct bnad_drvinfo); + + drv_info->debug_buffer = kzalloc(drv_info->buffer_len, GFP_KERNEL); + if (!drv_info->debug_buffer) { + kfree(drv_info); + drv_info = NULL; + return -ENOMEM; + } + + mutex_lock(&bnad->conf_mutex); + rc = bnad_get_debug_drvinfo(bnad, drv_info->debug_buffer, + drv_info->buffer_len); + mutex_unlock(&bnad->conf_mutex); + if (rc != BFA_STATUS_OK) { + kfree(drv_info->debug_buffer); + drv_info->debug_buffer = NULL; + kfree(drv_info); + drv_info = NULL; + netdev_warn(bnad->netdev, "failed to collect drvinfo\n"); + return -ENOMEM; + } + + file->private_data = drv_info; + + return 0; +} + +/* Changes the current file position */ +static loff_t +bnad_debugfs_lseek(struct file *file, loff_t offset, int orig) +{ + struct bnad_debug_info *debug = file->private_data; + + if (!debug) + return -EINVAL; + + return fixed_size_llseek(file, offset, orig, debug->buffer_len); +} + +static ssize_t +bnad_debugfs_read(struct file *file, char __user *buf, + size_t nbytes, loff_t *pos) +{ + struct bnad_debug_info *debug = file->private_data; + + if (!debug || !debug->debug_buffer) + return 0; + + return simple_read_from_buffer(buf, nbytes, pos, + debug->debug_buffer, debug->buffer_len); +} + +#define BFA_REG_CT_ADDRSZ (0x40000) +#define BFA_REG_CB_ADDRSZ (0x20000) +#define BFA_REG_ADDRSZ(__ioc) \ + ((u32)(bfa_asic_id_ctc(bfa_ioc_devid(__ioc)) ? \ + BFA_REG_CT_ADDRSZ : BFA_REG_CB_ADDRSZ)) +#define BFA_REG_ADDRMSK(__ioc) (BFA_REG_ADDRSZ(__ioc) - 1) + +/* + * Function to check if the register offset passed is valid. + */ +static int +bna_reg_offset_check(struct bfa_ioc *ioc, u32 offset, u32 len) +{ + u8 area; + + /* check [16:15] */ + area = (offset >> 15) & 0x7; + if (area == 0) { + /* PCIe core register */ + if (offset + (len << 2) > 0x8000) /* 8k dwords or 32KB */ + return BFA_STATUS_EINVAL; + } else if (area == 0x1) { + /* CB 32 KB memory page */ + if (offset + (len << 2) > 0x10000) /* 8k dwords or 32KB */ + return BFA_STATUS_EINVAL; + } else { + /* CB register space 64KB */ + if (offset + (len << 2) > BFA_REG_ADDRMSK(ioc)) + return BFA_STATUS_EINVAL; + } + return BFA_STATUS_OK; +} + +static ssize_t +bnad_debugfs_read_regrd(struct file *file, char __user *buf, + size_t nbytes, loff_t *pos) +{ + struct bnad_debug_info *regrd_debug = file->private_data; + struct bnad *bnad = (struct bnad *)regrd_debug->i_private; + ssize_t rc; + + if (!bnad->regdata) + return 0; + + rc = simple_read_from_buffer(buf, nbytes, pos, + bnad->regdata, bnad->reglen); + + if ((*pos + nbytes) >= bnad->reglen) { + kfree(bnad->regdata); + bnad->regdata = NULL; + bnad->reglen = 0; + } + + return rc; +} + +static ssize_t +bnad_debugfs_write_regrd(struct file *file, const char __user *buf, + size_t nbytes, loff_t *ppos) +{ + struct bnad_debug_info *regrd_debug = file->private_data; + struct bnad *bnad = (struct bnad *)regrd_debug->i_private; + struct bfa_ioc *ioc = &bnad->bna.ioceth.ioc; + int rc, i; + u32 addr, len; + u32 *regbuf; + void __iomem *rb, *reg_addr; + unsigned long flags; + void *kern_buf; + + /* Copy the user space buf */ + kern_buf = memdup_user(buf, nbytes); + if (IS_ERR(kern_buf)) + return PTR_ERR(kern_buf); + + rc = sscanf(kern_buf, "%x:%x", &addr, &len); + if (rc < 2 || len > UINT_MAX >> 2) { + netdev_warn(bnad->netdev, "failed to read user buffer\n"); + kfree(kern_buf); + return -EINVAL; + } + + kfree(kern_buf); + kfree(bnad->regdata); + bnad->reglen = 0; + + bnad->regdata = kzalloc(len << 2, GFP_KERNEL); + if (!bnad->regdata) + return -ENOMEM; + + bnad->reglen = len << 2; + rb = bfa_ioc_bar0(ioc); + addr &= BFA_REG_ADDRMSK(ioc); + + /* offset and len sanity check */ + rc = bna_reg_offset_check(ioc, addr, len); + if (rc) { + netdev_warn(bnad->netdev, "failed reg offset check\n"); + kfree(bnad->regdata); + bnad->regdata = NULL; + bnad->reglen = 0; + return -EINVAL; + } + + reg_addr = rb + addr; + regbuf = (u32 *)bnad->regdata; + spin_lock_irqsave(&bnad->bna_lock, flags); + for (i = 0; i < len; i++) { + *regbuf = readl(reg_addr); + regbuf++; + reg_addr += sizeof(u32); + } + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + return nbytes; +} + +static ssize_t +bnad_debugfs_write_regwr(struct file *file, const char __user *buf, + size_t nbytes, loff_t *ppos) +{ + struct bnad_debug_info *debug = file->private_data; + struct bnad *bnad = (struct bnad *)debug->i_private; + struct bfa_ioc *ioc = &bnad->bna.ioceth.ioc; + int rc; + u32 addr, val; + void __iomem *reg_addr; + unsigned long flags; + void *kern_buf; + + /* Copy the user space buf */ + kern_buf = memdup_user(buf, nbytes); + if (IS_ERR(kern_buf)) + return PTR_ERR(kern_buf); + + rc = sscanf(kern_buf, "%x:%x", &addr, &val); + if (rc < 2) { + netdev_warn(bnad->netdev, "failed to read user buffer\n"); + kfree(kern_buf); + return -EINVAL; + } + kfree(kern_buf); + + addr &= BFA_REG_ADDRMSK(ioc); /* offset only 17 bit and word align */ + + /* offset and len sanity check */ + rc = bna_reg_offset_check(ioc, addr, 1); + if (rc) { + netdev_warn(bnad->netdev, "failed reg offset check\n"); + return -EINVAL; + } + + reg_addr = (bfa_ioc_bar0(ioc)) + addr; + spin_lock_irqsave(&bnad->bna_lock, flags); + writel(val, reg_addr); + spin_unlock_irqrestore(&bnad->bna_lock, flags); + + return nbytes; +} + +static int +bnad_debugfs_release(struct inode *inode, struct file *file) +{ + struct bnad_debug_info *debug = file->private_data; + + if (!debug) + return 0; + + file->private_data = NULL; + kfree(debug); + return 0; +} + +static int +bnad_debugfs_buffer_release(struct inode *inode, struct file *file) +{ + struct bnad_debug_info *debug = file->private_data; + + if (!debug) + return 0; + + kfree(debug->debug_buffer); + + file->private_data = NULL; + kfree(debug); + debug = NULL; + return 0; +} + +static const struct file_operations bnad_debugfs_op_fwtrc = { + .owner = THIS_MODULE, + .open = bnad_debugfs_open_fwtrc, + .llseek = bnad_debugfs_lseek, + .read = bnad_debugfs_read, + .release = bnad_debugfs_buffer_release, +}; + +static const struct file_operations bnad_debugfs_op_fwsave = { + .owner = THIS_MODULE, + .open = bnad_debugfs_open_fwsave, + .llseek = bnad_debugfs_lseek, + .read = bnad_debugfs_read, + .release = bnad_debugfs_buffer_release, +}; + +static const struct file_operations bnad_debugfs_op_regrd = { + .owner = THIS_MODULE, + .open = bnad_debugfs_open_reg, + .llseek = bnad_debugfs_lseek, + .read = bnad_debugfs_read_regrd, + .write = bnad_debugfs_write_regrd, + .release = bnad_debugfs_release, +}; + +static const struct file_operations bnad_debugfs_op_regwr = { + .owner = THIS_MODULE, + .open = bnad_debugfs_open_reg, + .llseek = bnad_debugfs_lseek, + .write = bnad_debugfs_write_regwr, + .release = bnad_debugfs_release, +}; + +static const struct file_operations bnad_debugfs_op_drvinfo = { + .owner = THIS_MODULE, + .open = bnad_debugfs_open_drvinfo, + .llseek = bnad_debugfs_lseek, + .read = bnad_debugfs_read, + .release = bnad_debugfs_buffer_release, +}; + +struct bnad_debugfs_entry { + const char *name; + umode_t mode; + const struct file_operations *fops; +}; + +static const struct bnad_debugfs_entry bnad_debugfs_files[] = { + { "fwtrc", S_IFREG | 0444, &bnad_debugfs_op_fwtrc, }, + { "fwsave", S_IFREG | 0444, &bnad_debugfs_op_fwsave, }, + { "regrd", S_IFREG | 0644, &bnad_debugfs_op_regrd, }, + { "regwr", S_IFREG | 0200, &bnad_debugfs_op_regwr, }, + { "drvinfo", S_IFREG | 0444, &bnad_debugfs_op_drvinfo, }, +}; + +static struct dentry *bna_debugfs_root; +static atomic_t bna_debugfs_port_count; + +/* Initialize debugfs interface for BNA */ +void +bnad_debugfs_init(struct bnad *bnad) +{ + const struct bnad_debugfs_entry *file; + char name[64]; + int i; + + /* Setup the BNA debugfs root directory*/ + if (!bna_debugfs_root) { + bna_debugfs_root = debugfs_create_dir("bna", NULL); + atomic_set(&bna_debugfs_port_count, 0); + if (!bna_debugfs_root) { + netdev_warn(bnad->netdev, + "debugfs root dir creation failed\n"); + return; + } + } + + /* Setup the pci_dev debugfs directory for the port */ + snprintf(name, sizeof(name), "pci_dev:%s", pci_name(bnad->pcidev)); + if (!bnad->port_debugfs_root) { + bnad->port_debugfs_root = + debugfs_create_dir(name, bna_debugfs_root); + if (!bnad->port_debugfs_root) { + netdev_warn(bnad->netdev, + "debugfs root dir creation failed\n"); + return; + } + + atomic_inc(&bna_debugfs_port_count); + + for (i = 0; i < ARRAY_SIZE(bnad_debugfs_files); i++) { + file = &bnad_debugfs_files[i]; + bnad->bnad_dentry_files[i] = + debugfs_create_file(file->name, + file->mode, + bnad->port_debugfs_root, + bnad, + file->fops); + if (!bnad->bnad_dentry_files[i]) { + netdev_warn(bnad->netdev, + "create %s entry failed\n", + file->name); + return; + } + } + } +} + +/* Uninitialize debugfs interface for BNA */ +void +bnad_debugfs_uninit(struct bnad *bnad) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(bnad_debugfs_files); i++) { + if (bnad->bnad_dentry_files[i]) { + debugfs_remove(bnad->bnad_dentry_files[i]); + bnad->bnad_dentry_files[i] = NULL; + } + } + + /* Remove the pci_dev debugfs directory for the port */ + if (bnad->port_debugfs_root) { + debugfs_remove(bnad->port_debugfs_root); + bnad->port_debugfs_root = NULL; + atomic_dec(&bna_debugfs_port_count); + } + + /* Remove the BNA debugfs root directory */ + if (atomic_read(&bna_debugfs_port_count) == 0) { + debugfs_remove(bna_debugfs_root); + bna_debugfs_root = NULL; + } +} -- cgit v1.2.3