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/scsi/elx/efct/efct_driver.c | 782 ++++++++++++++++++++++++++++++++++++ 1 file changed, 782 insertions(+) create mode 100644 drivers/scsi/elx/efct/efct_driver.c (limited to 'drivers/scsi/elx/efct/efct_driver.c') diff --git a/drivers/scsi/elx/efct/efct_driver.c b/drivers/scsi/elx/efct/efct_driver.c new file mode 100644 index 000000000..49fd2cfed --- /dev/null +++ b/drivers/scsi/elx/efct/efct_driver.c @@ -0,0 +1,782 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2021 Broadcom. All Rights Reserved. The term + * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. + */ + +#include "efct_driver.h" + +#include "efct_hw.h" +#include "efct_unsol.h" +#include "efct_scsi.h" + +LIST_HEAD(efct_devices); + +static int logmask; +module_param(logmask, int, 0444); +MODULE_PARM_DESC(logmask, "logging bitmask (default 0)"); + +static struct libefc_function_template efct_libefc_templ = { + .issue_mbox_rqst = efct_issue_mbox_rqst, + .send_els = efct_els_hw_srrs_send, + .send_bls = efct_efc_bls_send, + + .new_nport = efct_scsi_tgt_new_nport, + .del_nport = efct_scsi_tgt_del_nport, + .scsi_new_node = efct_scsi_new_initiator, + .scsi_del_node = efct_scsi_del_initiator, + .hw_seq_free = efct_efc_hw_sequence_free, +}; + +static int +efct_device_init(void) +{ + int rc; + + /* driver-wide init for target-server */ + rc = efct_scsi_tgt_driver_init(); + if (rc) { + pr_err("efct_scsi_tgt_init failed rc=%d\n", rc); + return rc; + } + + rc = efct_scsi_reg_fc_transport(); + if (rc) { + efct_scsi_tgt_driver_exit(); + pr_err("failed to register to FC host\n"); + return rc; + } + + return 0; +} + +static void +efct_device_shutdown(void) +{ + efct_scsi_release_fc_transport(); + + efct_scsi_tgt_driver_exit(); +} + +static void * +efct_device_alloc(u32 nid) +{ + struct efct *efct = NULL; + + efct = kzalloc_node(sizeof(*efct), GFP_KERNEL, nid); + if (!efct) + return efct; + + INIT_LIST_HEAD(&efct->list_entry); + list_add_tail(&efct->list_entry, &efct_devices); + + return efct; +} + +static void +efct_teardown_msix(struct efct *efct) +{ + u32 i; + + for (i = 0; i < efct->n_msix_vec; i++) { + free_irq(pci_irq_vector(efct->pci, i), + &efct->intr_context[i]); + } + + pci_free_irq_vectors(efct->pci); +} + +static int +efct_efclib_config(struct efct *efct, struct libefc_function_template *tt) +{ + struct efc *efc; + struct sli4 *sli; + int rc = 0; + + efc = kzalloc(sizeof(*efc), GFP_KERNEL); + if (!efc) + return -ENOMEM; + + efct->efcport = efc; + + memcpy(&efc->tt, tt, sizeof(*tt)); + efc->base = efct; + efc->pci = efct->pci; + + efc->def_wwnn = efct_get_wwnn(&efct->hw); + efc->def_wwpn = efct_get_wwpn(&efct->hw); + efc->enable_tgt = 1; + efc->log_level = EFC_LOG_LIB; + + sli = &efct->hw.sli; + efc->max_xfer_size = sli->sge_supported_length * + sli_get_max_sgl(&efct->hw.sli); + efc->sli = sli; + efc->fcfi = efct->hw.fcf_indicator; + + rc = efcport_init(efc); + if (rc) + efc_log_err(efc, "efcport_init failed\n"); + + return rc; +} + +static int efct_request_firmware_update(struct efct *efct); + +static const char* +efct_pci_model(u16 device) +{ + switch (device) { + case EFCT_DEVICE_LANCER_G6: return "LPE31004"; + case EFCT_DEVICE_LANCER_G7: return "LPE36000"; + default: return "unknown"; + } +} + +static int +efct_device_attach(struct efct *efct) +{ + u32 rc = 0, i = 0; + + if (efct->attached) { + efc_log_err(efct, "Device is already attached\n"); + return -EIO; + } + + snprintf(efct->name, sizeof(efct->name), "[%s%d] ", "fc", + efct->instance_index); + + efct->logmask = logmask; + efct->filter_def = EFCT_DEFAULT_FILTER; + efct->max_isr_time_msec = EFCT_OS_MAX_ISR_TIME_MSEC; + + efct->model = efct_pci_model(efct->pci->device); + + efct->efct_req_fw_upgrade = true; + + /* Allocate transport object and bring online */ + efct->xport = efct_xport_alloc(efct); + if (!efct->xport) { + efc_log_err(efct, "failed to allocate transport object\n"); + rc = -ENOMEM; + goto out; + } + + rc = efct_xport_attach(efct->xport); + if (rc) { + efc_log_err(efct, "failed to attach transport object\n"); + goto xport_out; + } + + rc = efct_xport_initialize(efct->xport); + if (rc) { + efc_log_err(efct, "failed to initialize transport object\n"); + goto xport_out; + } + + rc = efct_efclib_config(efct, &efct_libefc_templ); + if (rc) { + efc_log_err(efct, "failed to init efclib\n"); + goto efclib_out; + } + + for (i = 0; i < efct->n_msix_vec; i++) { + efc_log_debug(efct, "irq %d enabled\n", i); + enable_irq(pci_irq_vector(efct->pci, i)); + } + + efct->attached = true; + + if (efct->efct_req_fw_upgrade) + efct_request_firmware_update(efct); + + return rc; + +efclib_out: + efct_xport_detach(efct->xport); +xport_out: + efct_xport_free(efct->xport); + efct->xport = NULL; +out: + return rc; +} + +static int +efct_device_detach(struct efct *efct) +{ + int i; + + if (!efct || !efct->attached) { + pr_err("Device is not attached\n"); + return -EIO; + } + + if (efct_xport_control(efct->xport, EFCT_XPORT_SHUTDOWN)) + efc_log_err(efct, "Transport Shutdown timed out\n"); + + for (i = 0; i < efct->n_msix_vec; i++) + disable_irq(pci_irq_vector(efct->pci, i)); + + efct_xport_detach(efct->xport); + + efct_xport_free(efct->xport); + efct->xport = NULL; + + efcport_destroy(efct->efcport); + kfree(efct->efcport); + + efct->attached = false; + + return 0; +} + +static void +efct_fw_write_cb(int status, u32 actual_write_length, + u32 change_status, void *arg) +{ + struct efct_fw_write_result *result = arg; + + result->status = status; + result->actual_xfer = actual_write_length; + result->change_status = change_status; + + complete(&result->done); +} + +static int +efct_firmware_write(struct efct *efct, const u8 *buf, size_t buf_len, + u8 *change_status) +{ + int rc = 0; + u32 bytes_left; + u32 xfer_size; + u32 offset; + struct efc_dma dma; + int last = 0; + struct efct_fw_write_result result; + + init_completion(&result.done); + + bytes_left = buf_len; + offset = 0; + + dma.size = FW_WRITE_BUFSIZE; + dma.virt = dma_alloc_coherent(&efct->pci->dev, + dma.size, &dma.phys, GFP_KERNEL); + if (!dma.virt) + return -ENOMEM; + + while (bytes_left > 0) { + if (bytes_left > FW_WRITE_BUFSIZE) + xfer_size = FW_WRITE_BUFSIZE; + else + xfer_size = bytes_left; + + memcpy(dma.virt, buf + offset, xfer_size); + + if (bytes_left == xfer_size) + last = 1; + + efct_hw_firmware_write(&efct->hw, &dma, xfer_size, offset, + last, efct_fw_write_cb, &result); + + if (wait_for_completion_interruptible(&result.done) != 0) { + rc = -ENXIO; + break; + } + + if (result.actual_xfer == 0 || result.status != 0) { + rc = -EFAULT; + break; + } + + if (last) + *change_status = result.change_status; + + bytes_left -= result.actual_xfer; + offset += result.actual_xfer; + } + + dma_free_coherent(&efct->pci->dev, dma.size, dma.virt, dma.phys); + return rc; +} + +static int +efct_fw_reset(struct efct *efct) +{ + /* + * Firmware reset to activate the new firmware. + * Function 0 will update and load the new firmware + * during attach. + */ + if (timer_pending(&efct->xport->stats_timer)) + del_timer(&efct->xport->stats_timer); + + if (efct_hw_reset(&efct->hw, EFCT_HW_RESET_FIRMWARE)) { + efc_log_info(efct, "failed to reset firmware\n"); + return -EIO; + } + + efc_log_info(efct, "successfully reset firmware.Now resetting port\n"); + + efct_device_detach(efct); + return efct_device_attach(efct); +} + +static int +efct_request_firmware_update(struct efct *efct) +{ + int rc = 0; + u8 file_name[256], fw_change_status = 0; + const struct firmware *fw; + struct efct_hw_grp_hdr *fw_image; + + snprintf(file_name, 256, "%s.grp", efct->model); + + rc = request_firmware(&fw, file_name, &efct->pci->dev); + if (rc) { + efc_log_debug(efct, "Firmware file(%s) not found.\n", file_name); + return rc; + } + + fw_image = (struct efct_hw_grp_hdr *)fw->data; + + if (!strncmp(efct->hw.sli.fw_name[0], fw_image->revision, + strnlen(fw_image->revision, 16))) { + efc_log_debug(efct, + "Skip update. Firmware is already up to date.\n"); + goto exit; + } + + efc_log_info(efct, "Firmware update is initiated. %s -> %s\n", + efct->hw.sli.fw_name[0], fw_image->revision); + + rc = efct_firmware_write(efct, fw->data, fw->size, &fw_change_status); + if (rc) { + efc_log_err(efct, "Firmware update failed. rc = %d\n", rc); + goto exit; + } + + efc_log_info(efct, "Firmware updated successfully\n"); + switch (fw_change_status) { + case 0x00: + efc_log_info(efct, "New firmware is active.\n"); + break; + case 0x01: + efc_log_info(efct, + "System reboot needed to activate the new firmware\n"); + break; + case 0x02: + case 0x03: + efc_log_info(efct, + "firmware reset to activate the new firmware\n"); + efct_fw_reset(efct); + break; + default: + efc_log_info(efct, "Unexpected value change_status:%d\n", + fw_change_status); + break; + } + +exit: + release_firmware(fw); + + return rc; +} + +static void +efct_device_free(struct efct *efct) +{ + if (efct) { + list_del(&efct->list_entry); + kfree(efct); + } +} + +static int +efct_device_interrupts_required(struct efct *efct) +{ + int rc; + + rc = efct_hw_setup(&efct->hw, efct, efct->pci); + if (rc < 0) + return rc; + + return efct->hw.config.n_eq; +} + +static irqreturn_t +efct_intr_thread(int irq, void *handle) +{ + struct efct_intr_context *intr_ctx = handle; + struct efct *efct = intr_ctx->efct; + + efct_hw_process(&efct->hw, intr_ctx->index, efct->max_isr_time_msec); + return IRQ_HANDLED; +} + +static irqreturn_t +efct_intr_msix(int irq, void *handle) +{ + return IRQ_WAKE_THREAD; +} + +static int +efct_setup_msix(struct efct *efct, u32 num_intrs) +{ + int rc = 0, i; + + if (!pci_find_capability(efct->pci, PCI_CAP_ID_MSIX)) { + dev_err(&efct->pci->dev, + "%s : MSI-X not available\n", __func__); + return -EIO; + } + + efct->n_msix_vec = num_intrs; + + rc = pci_alloc_irq_vectors(efct->pci, num_intrs, num_intrs, + PCI_IRQ_MSIX | PCI_IRQ_AFFINITY); + + if (rc < 0) { + dev_err(&efct->pci->dev, "Failed to alloc irq : %d\n", rc); + return rc; + } + + for (i = 0; i < num_intrs; i++) { + struct efct_intr_context *intr_ctx = NULL; + + intr_ctx = &efct->intr_context[i]; + intr_ctx->efct = efct; + intr_ctx->index = i; + + rc = request_threaded_irq(pci_irq_vector(efct->pci, i), + efct_intr_msix, efct_intr_thread, 0, + EFCT_DRIVER_NAME, intr_ctx); + if (rc) { + dev_err(&efct->pci->dev, + "Failed to register %d vector: %d\n", i, rc); + goto out; + } + } + + return rc; + +out: + while (--i >= 0) + free_irq(pci_irq_vector(efct->pci, i), + &efct->intr_context[i]); + + pci_free_irq_vectors(efct->pci); + return rc; +} + +static struct pci_device_id efct_pci_table[] = { + {PCI_DEVICE(EFCT_VENDOR_ID, EFCT_DEVICE_LANCER_G6), 0}, + {PCI_DEVICE(EFCT_VENDOR_ID, EFCT_DEVICE_LANCER_G7), 0}, + {} /* terminate list */ +}; + +static int +efct_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + struct efct *efct = NULL; + int rc; + u32 i, r; + int num_interrupts = 0; + int nid; + + dev_info(&pdev->dev, "%s\n", EFCT_DRIVER_NAME); + + rc = pci_enable_device_mem(pdev); + if (rc) + return rc; + + pci_set_master(pdev); + + rc = pci_set_mwi(pdev); + if (rc) { + dev_info(&pdev->dev, "pci_set_mwi returned %d\n", rc); + goto mwi_out; + } + + rc = pci_request_regions(pdev, EFCT_DRIVER_NAME); + if (rc) { + dev_err(&pdev->dev, "pci_request_regions failed %d\n", rc); + goto req_regions_out; + } + + /* Fetch the Numa node id for this device */ + nid = dev_to_node(&pdev->dev); + if (nid < 0) { + dev_err(&pdev->dev, "Warning Numa node ID is %d\n", nid); + nid = 0; + } + + /* Allocate efct */ + efct = efct_device_alloc(nid); + if (!efct) { + dev_err(&pdev->dev, "Failed to allocate efct\n"); + rc = -ENOMEM; + goto alloc_out; + } + + efct->pci = pdev; + efct->numa_node = nid; + + /* Map all memory BARs */ + for (i = 0, r = 0; i < EFCT_PCI_MAX_REGS; i++) { + if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) { + efct->reg[r] = ioremap(pci_resource_start(pdev, i), + pci_resource_len(pdev, i)); + r++; + } + + /* + * If the 64-bit attribute is set, both this BAR and the + * next form the complete address. Skip processing the + * next BAR. + */ + if (pci_resource_flags(pdev, i) & IORESOURCE_MEM_64) + i++; + } + + pci_set_drvdata(pdev, efct); + + rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); + if (rc) { + dev_err(&pdev->dev, "setting DMA_BIT_MASK failed\n"); + goto dma_mask_out; + } + + num_interrupts = efct_device_interrupts_required(efct); + if (num_interrupts < 0) { + efc_log_err(efct, "efct_device_interrupts_required failed\n"); + rc = -1; + goto dma_mask_out; + } + + /* + * Initialize MSIX interrupts, note, + * efct_setup_msix() enables the interrupt + */ + rc = efct_setup_msix(efct, num_interrupts); + if (rc) { + dev_err(&pdev->dev, "Can't setup msix\n"); + goto dma_mask_out; + } + /* Disable interrupt for now */ + for (i = 0; i < efct->n_msix_vec; i++) { + efc_log_debug(efct, "irq %d disabled\n", i); + disable_irq(pci_irq_vector(efct->pci, i)); + } + + rc = efct_device_attach(efct); + if (rc) + goto attach_out; + + return 0; + +attach_out: + efct_teardown_msix(efct); +dma_mask_out: + pci_set_drvdata(pdev, NULL); + + for (i = 0; i < EFCT_PCI_MAX_REGS; i++) { + if (efct->reg[i]) + iounmap(efct->reg[i]); + } + efct_device_free(efct); +alloc_out: + pci_release_regions(pdev); +req_regions_out: + pci_clear_mwi(pdev); +mwi_out: + pci_disable_device(pdev); + return rc; +} + +static void +efct_pci_remove(struct pci_dev *pdev) +{ + struct efct *efct = pci_get_drvdata(pdev); + u32 i; + + if (!efct) + return; + + efct_device_detach(efct); + + efct_teardown_msix(efct); + + for (i = 0; i < EFCT_PCI_MAX_REGS; i++) { + if (efct->reg[i]) + iounmap(efct->reg[i]); + } + + pci_set_drvdata(pdev, NULL); + + efct_device_free(efct); + + pci_release_regions(pdev); + + pci_disable_device(pdev); +} + +static void +efct_device_prep_for_reset(struct efct *efct, struct pci_dev *pdev) +{ + if (efct) { + efc_log_debug(efct, + "PCI channel disable preparing for reset\n"); + efct_device_detach(efct); + /* Disable interrupt and pci device */ + efct_teardown_msix(efct); + } + pci_disable_device(pdev); +} + +static void +efct_device_prep_for_recover(struct efct *efct) +{ + if (efct) { + efc_log_debug(efct, "PCI channel preparing for recovery\n"); + efct_hw_io_abort_all(&efct->hw); + } +} + +/** + * efct_pci_io_error_detected - method for handling PCI I/O error + * @pdev: pointer to PCI device. + * @state: the current PCI connection state. + * + * This routine is registered to the PCI subsystem for error handling. This + * function is called by the PCI subsystem after a PCI bus error affecting + * this device has been detected. When this routine is invoked, it dispatches + * device error detected handling routine, which will perform the proper + * error detected operation. + * + * Return codes + * PCI_ERS_RESULT_NEED_RESET - need to reset before recovery + * PCI_ERS_RESULT_DISCONNECT - device could not be recovered + */ +static pci_ers_result_t +efct_pci_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state) +{ + struct efct *efct = pci_get_drvdata(pdev); + pci_ers_result_t rc; + + switch (state) { + case pci_channel_io_normal: + efct_device_prep_for_recover(efct); + rc = PCI_ERS_RESULT_CAN_RECOVER; + break; + case pci_channel_io_frozen: + efct_device_prep_for_reset(efct, pdev); + rc = PCI_ERS_RESULT_NEED_RESET; + break; + case pci_channel_io_perm_failure: + efct_device_detach(efct); + rc = PCI_ERS_RESULT_DISCONNECT; + break; + default: + efc_log_debug(efct, "Unknown PCI error state:0x%x\n", state); + efct_device_prep_for_reset(efct, pdev); + rc = PCI_ERS_RESULT_NEED_RESET; + break; + } + + return rc; +} + +static pci_ers_result_t +efct_pci_io_slot_reset(struct pci_dev *pdev) +{ + int rc; + struct efct *efct = pci_get_drvdata(pdev); + + rc = pci_enable_device_mem(pdev); + if (rc) { + efc_log_err(efct, "failed to enable PCI device after reset\n"); + return PCI_ERS_RESULT_DISCONNECT; + } + + /* + * As the new kernel behavior of pci_restore_state() API call clears + * device saved_state flag, need to save the restored state again. + */ + + pci_save_state(pdev); + + pci_set_master(pdev); + + rc = efct_setup_msix(efct, efct->n_msix_vec); + if (rc) + efc_log_err(efct, "rc %d returned, IRQ allocation failed\n", + rc); + + /* Perform device reset */ + efct_device_detach(efct); + /* Bring device to online*/ + efct_device_attach(efct); + + return PCI_ERS_RESULT_RECOVERED; +} + +static void +efct_pci_io_resume(struct pci_dev *pdev) +{ + struct efct *efct = pci_get_drvdata(pdev); + + /* Perform device reset */ + efct_device_detach(efct); + /* Bring device to online*/ + efct_device_attach(efct); +} + +MODULE_DEVICE_TABLE(pci, efct_pci_table); + +static struct pci_error_handlers efct_pci_err_handler = { + .error_detected = efct_pci_io_error_detected, + .slot_reset = efct_pci_io_slot_reset, + .resume = efct_pci_io_resume, +}; + +static struct pci_driver efct_pci_driver = { + .name = EFCT_DRIVER_NAME, + .id_table = efct_pci_table, + .probe = efct_pci_probe, + .remove = efct_pci_remove, + .err_handler = &efct_pci_err_handler, +}; + +static +int __init efct_init(void) +{ + int rc; + + rc = efct_device_init(); + if (rc) { + pr_err("efct_device_init failed rc=%d\n", rc); + return rc; + } + + rc = pci_register_driver(&efct_pci_driver); + if (rc) { + pr_err("pci_register_driver failed rc=%d\n", rc); + efct_device_shutdown(); + } + + return rc; +} + +static void __exit efct_exit(void) +{ + pci_unregister_driver(&efct_pci_driver); + efct_device_shutdown(); +} + +module_init(efct_init); +module_exit(efct_exit); +MODULE_VERSION(EFCT_DRIVER_VERSION); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Broadcom"); -- cgit v1.2.3