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/dma/qcom/hidma_mgmt.c | 440 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 440 insertions(+) create mode 100644 drivers/dma/qcom/hidma_mgmt.c (limited to 'drivers/dma/qcom/hidma_mgmt.c') diff --git a/drivers/dma/qcom/hidma_mgmt.c b/drivers/dma/qcom/hidma_mgmt.c new file mode 100644 index 000000000..62026607f --- /dev/null +++ b/drivers/dma/qcom/hidma_mgmt.c @@ -0,0 +1,440 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Qualcomm Technologies HIDMA DMA engine Management interface + * + * Copyright (c) 2015-2017, The Linux Foundation. All rights reserved. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "hidma_mgmt.h" + +#define HIDMA_QOS_N_OFFSET 0x700 +#define HIDMA_CFG_OFFSET 0x400 +#define HIDMA_MAX_BUS_REQ_LEN_OFFSET 0x41C +#define HIDMA_MAX_XACTIONS_OFFSET 0x420 +#define HIDMA_HW_VERSION_OFFSET 0x424 +#define HIDMA_CHRESET_TIMEOUT_OFFSET 0x418 + +#define HIDMA_MAX_WR_XACTIONS_MASK GENMASK(4, 0) +#define HIDMA_MAX_RD_XACTIONS_MASK GENMASK(4, 0) +#define HIDMA_WEIGHT_MASK GENMASK(6, 0) +#define HIDMA_MAX_BUS_REQ_LEN_MASK GENMASK(15, 0) +#define HIDMA_CHRESET_TIMEOUT_MASK GENMASK(19, 0) + +#define HIDMA_MAX_WR_XACTIONS_BIT_POS 16 +#define HIDMA_MAX_BUS_WR_REQ_BIT_POS 16 +#define HIDMA_WRR_BIT_POS 8 +#define HIDMA_PRIORITY_BIT_POS 15 + +#define HIDMA_AUTOSUSPEND_TIMEOUT 2000 +#define HIDMA_MAX_CHANNEL_WEIGHT 15 + +static unsigned int max_write_request; +module_param(max_write_request, uint, 0644); +MODULE_PARM_DESC(max_write_request, + "maximum write burst (default: ACPI/DT value)"); + +static unsigned int max_read_request; +module_param(max_read_request, uint, 0644); +MODULE_PARM_DESC(max_read_request, + "maximum read burst (default: ACPI/DT value)"); + +static unsigned int max_wr_xactions; +module_param(max_wr_xactions, uint, 0644); +MODULE_PARM_DESC(max_wr_xactions, + "maximum number of write transactions (default: ACPI/DT value)"); + +static unsigned int max_rd_xactions; +module_param(max_rd_xactions, uint, 0644); +MODULE_PARM_DESC(max_rd_xactions, + "maximum number of read transactions (default: ACPI/DT value)"); + +int hidma_mgmt_setup(struct hidma_mgmt_dev *mgmtdev) +{ + unsigned int i; + u32 val; + + if (!is_power_of_2(mgmtdev->max_write_request) || + (mgmtdev->max_write_request < 128) || + (mgmtdev->max_write_request > 1024)) { + dev_err(&mgmtdev->pdev->dev, "invalid write request %d\n", + mgmtdev->max_write_request); + return -EINVAL; + } + + if (!is_power_of_2(mgmtdev->max_read_request) || + (mgmtdev->max_read_request < 128) || + (mgmtdev->max_read_request > 1024)) { + dev_err(&mgmtdev->pdev->dev, "invalid read request %d\n", + mgmtdev->max_read_request); + return -EINVAL; + } + + if (mgmtdev->max_wr_xactions > HIDMA_MAX_WR_XACTIONS_MASK) { + dev_err(&mgmtdev->pdev->dev, + "max_wr_xactions cannot be bigger than %ld\n", + HIDMA_MAX_WR_XACTIONS_MASK); + return -EINVAL; + } + + if (mgmtdev->max_rd_xactions > HIDMA_MAX_RD_XACTIONS_MASK) { + dev_err(&mgmtdev->pdev->dev, + "max_rd_xactions cannot be bigger than %ld\n", + HIDMA_MAX_RD_XACTIONS_MASK); + return -EINVAL; + } + + for (i = 0; i < mgmtdev->dma_channels; i++) { + if (mgmtdev->priority[i] > 1) { + dev_err(&mgmtdev->pdev->dev, + "priority can be 0 or 1\n"); + return -EINVAL; + } + + if (mgmtdev->weight[i] > HIDMA_MAX_CHANNEL_WEIGHT) { + dev_err(&mgmtdev->pdev->dev, + "max value of weight can be %d.\n", + HIDMA_MAX_CHANNEL_WEIGHT); + return -EINVAL; + } + + /* weight needs to be at least one */ + if (mgmtdev->weight[i] == 0) + mgmtdev->weight[i] = 1; + } + + pm_runtime_get_sync(&mgmtdev->pdev->dev); + val = readl(mgmtdev->virtaddr + HIDMA_MAX_BUS_REQ_LEN_OFFSET); + val &= ~(HIDMA_MAX_BUS_REQ_LEN_MASK << HIDMA_MAX_BUS_WR_REQ_BIT_POS); + val |= mgmtdev->max_write_request << HIDMA_MAX_BUS_WR_REQ_BIT_POS; + val &= ~HIDMA_MAX_BUS_REQ_LEN_MASK; + val |= mgmtdev->max_read_request; + writel(val, mgmtdev->virtaddr + HIDMA_MAX_BUS_REQ_LEN_OFFSET); + + val = readl(mgmtdev->virtaddr + HIDMA_MAX_XACTIONS_OFFSET); + val &= ~(HIDMA_MAX_WR_XACTIONS_MASK << HIDMA_MAX_WR_XACTIONS_BIT_POS); + val |= mgmtdev->max_wr_xactions << HIDMA_MAX_WR_XACTIONS_BIT_POS; + val &= ~HIDMA_MAX_RD_XACTIONS_MASK; + val |= mgmtdev->max_rd_xactions; + writel(val, mgmtdev->virtaddr + HIDMA_MAX_XACTIONS_OFFSET); + + mgmtdev->hw_version = + readl(mgmtdev->virtaddr + HIDMA_HW_VERSION_OFFSET); + mgmtdev->hw_version_major = (mgmtdev->hw_version >> 28) & 0xF; + mgmtdev->hw_version_minor = (mgmtdev->hw_version >> 16) & 0xF; + + for (i = 0; i < mgmtdev->dma_channels; i++) { + u32 weight = mgmtdev->weight[i]; + u32 priority = mgmtdev->priority[i]; + + val = readl(mgmtdev->virtaddr + HIDMA_QOS_N_OFFSET + (4 * i)); + val &= ~(1 << HIDMA_PRIORITY_BIT_POS); + val |= (priority & 0x1) << HIDMA_PRIORITY_BIT_POS; + val &= ~(HIDMA_WEIGHT_MASK << HIDMA_WRR_BIT_POS); + val |= (weight & HIDMA_WEIGHT_MASK) << HIDMA_WRR_BIT_POS; + writel(val, mgmtdev->virtaddr + HIDMA_QOS_N_OFFSET + (4 * i)); + } + + val = readl(mgmtdev->virtaddr + HIDMA_CHRESET_TIMEOUT_OFFSET); + val &= ~HIDMA_CHRESET_TIMEOUT_MASK; + val |= mgmtdev->chreset_timeout_cycles & HIDMA_CHRESET_TIMEOUT_MASK; + writel(val, mgmtdev->virtaddr + HIDMA_CHRESET_TIMEOUT_OFFSET); + + pm_runtime_mark_last_busy(&mgmtdev->pdev->dev); + pm_runtime_put_autosuspend(&mgmtdev->pdev->dev); + return 0; +} +EXPORT_SYMBOL_GPL(hidma_mgmt_setup); + +static int hidma_mgmt_probe(struct platform_device *pdev) +{ + struct hidma_mgmt_dev *mgmtdev; + struct resource *res; + void __iomem *virtaddr; + int irq; + int rc; + u32 val; + + pm_runtime_set_autosuspend_delay(&pdev->dev, HIDMA_AUTOSUSPEND_TIMEOUT); + pm_runtime_use_autosuspend(&pdev->dev); + pm_runtime_set_active(&pdev->dev); + pm_runtime_enable(&pdev->dev); + pm_runtime_get_sync(&pdev->dev); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + virtaddr = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(virtaddr)) { + rc = -ENOMEM; + goto out; + } + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + rc = irq; + goto out; + } + + mgmtdev = devm_kzalloc(&pdev->dev, sizeof(*mgmtdev), GFP_KERNEL); + if (!mgmtdev) { + rc = -ENOMEM; + goto out; + } + + mgmtdev->pdev = pdev; + mgmtdev->addrsize = resource_size(res); + mgmtdev->virtaddr = virtaddr; + + rc = device_property_read_u32(&pdev->dev, "dma-channels", + &mgmtdev->dma_channels); + if (rc) { + dev_err(&pdev->dev, "number of channels missing\n"); + goto out; + } + + rc = device_property_read_u32(&pdev->dev, + "channel-reset-timeout-cycles", + &mgmtdev->chreset_timeout_cycles); + if (rc) { + dev_err(&pdev->dev, "channel reset timeout missing\n"); + goto out; + } + + rc = device_property_read_u32(&pdev->dev, "max-write-burst-bytes", + &mgmtdev->max_write_request); + if (rc) { + dev_err(&pdev->dev, "max-write-burst-bytes missing\n"); + goto out; + } + + if (max_write_request && + (max_write_request != mgmtdev->max_write_request)) { + dev_info(&pdev->dev, "overriding max-write-burst-bytes: %d\n", + max_write_request); + mgmtdev->max_write_request = max_write_request; + } else + max_write_request = mgmtdev->max_write_request; + + rc = device_property_read_u32(&pdev->dev, "max-read-burst-bytes", + &mgmtdev->max_read_request); + if (rc) { + dev_err(&pdev->dev, "max-read-burst-bytes missing\n"); + goto out; + } + if (max_read_request && + (max_read_request != mgmtdev->max_read_request)) { + dev_info(&pdev->dev, "overriding max-read-burst-bytes: %d\n", + max_read_request); + mgmtdev->max_read_request = max_read_request; + } else + max_read_request = mgmtdev->max_read_request; + + rc = device_property_read_u32(&pdev->dev, "max-write-transactions", + &mgmtdev->max_wr_xactions); + if (rc) { + dev_err(&pdev->dev, "max-write-transactions missing\n"); + goto out; + } + if (max_wr_xactions && + (max_wr_xactions != mgmtdev->max_wr_xactions)) { + dev_info(&pdev->dev, "overriding max-write-transactions: %d\n", + max_wr_xactions); + mgmtdev->max_wr_xactions = max_wr_xactions; + } else + max_wr_xactions = mgmtdev->max_wr_xactions; + + rc = device_property_read_u32(&pdev->dev, "max-read-transactions", + &mgmtdev->max_rd_xactions); + if (rc) { + dev_err(&pdev->dev, "max-read-transactions missing\n"); + goto out; + } + if (max_rd_xactions && + (max_rd_xactions != mgmtdev->max_rd_xactions)) { + dev_info(&pdev->dev, "overriding max-read-transactions: %d\n", + max_rd_xactions); + mgmtdev->max_rd_xactions = max_rd_xactions; + } else + max_rd_xactions = mgmtdev->max_rd_xactions; + + mgmtdev->priority = devm_kcalloc(&pdev->dev, + mgmtdev->dma_channels, + sizeof(*mgmtdev->priority), + GFP_KERNEL); + if (!mgmtdev->priority) { + rc = -ENOMEM; + goto out; + } + + mgmtdev->weight = devm_kcalloc(&pdev->dev, + mgmtdev->dma_channels, + sizeof(*mgmtdev->weight), GFP_KERNEL); + if (!mgmtdev->weight) { + rc = -ENOMEM; + goto out; + } + + rc = hidma_mgmt_setup(mgmtdev); + if (rc) { + dev_err(&pdev->dev, "setup failed\n"); + goto out; + } + + /* start the HW */ + val = readl(mgmtdev->virtaddr + HIDMA_CFG_OFFSET); + val |= 1; + writel(val, mgmtdev->virtaddr + HIDMA_CFG_OFFSET); + + rc = hidma_mgmt_init_sys(mgmtdev); + if (rc) { + dev_err(&pdev->dev, "sysfs setup failed\n"); + goto out; + } + + dev_info(&pdev->dev, + "HW rev: %d.%d @ %pa with %d physical channels\n", + mgmtdev->hw_version_major, mgmtdev->hw_version_minor, + &res->start, mgmtdev->dma_channels); + + platform_set_drvdata(pdev, mgmtdev); + pm_runtime_mark_last_busy(&pdev->dev); + pm_runtime_put_autosuspend(&pdev->dev); + return 0; +out: + pm_runtime_put_sync_suspend(&pdev->dev); + pm_runtime_disable(&pdev->dev); + return rc; +} + +#if IS_ENABLED(CONFIG_ACPI) +static const struct acpi_device_id hidma_mgmt_acpi_ids[] = { + {"QCOM8060"}, + {}, +}; +MODULE_DEVICE_TABLE(acpi, hidma_mgmt_acpi_ids); +#endif + +static const struct of_device_id hidma_mgmt_match[] = { + {.compatible = "qcom,hidma-mgmt-1.0",}, + {}, +}; +MODULE_DEVICE_TABLE(of, hidma_mgmt_match); + +static struct platform_driver hidma_mgmt_driver = { + .probe = hidma_mgmt_probe, + .driver = { + .name = "hidma-mgmt", + .of_match_table = hidma_mgmt_match, + .acpi_match_table = ACPI_PTR(hidma_mgmt_acpi_ids), + }, +}; + +#if defined(CONFIG_OF) && defined(CONFIG_OF_IRQ) +static int object_counter; + +static int __init hidma_mgmt_of_populate_channels(struct device_node *np) +{ + struct platform_device *pdev_parent = of_find_device_by_node(np); + struct platform_device_info pdevinfo; + struct device_node *child; + struct resource *res; + int ret = 0; + + /* allocate a resource array */ + res = kcalloc(3, sizeof(*res), GFP_KERNEL); + if (!res) + return -ENOMEM; + + for_each_available_child_of_node(np, child) { + struct platform_device *new_pdev; + + ret = of_address_to_resource(child, 0, &res[0]); + if (!ret) + goto out; + + ret = of_address_to_resource(child, 1, &res[1]); + if (!ret) + goto out; + + ret = of_irq_to_resource(child, 0, &res[2]); + if (ret <= 0) + goto out; + + memset(&pdevinfo, 0, sizeof(pdevinfo)); + pdevinfo.fwnode = &child->fwnode; + pdevinfo.parent = pdev_parent ? &pdev_parent->dev : NULL; + pdevinfo.name = child->name; + pdevinfo.id = object_counter++; + pdevinfo.res = res; + pdevinfo.num_res = 3; + pdevinfo.data = NULL; + pdevinfo.size_data = 0; + pdevinfo.dma_mask = DMA_BIT_MASK(64); + new_pdev = platform_device_register_full(&pdevinfo); + if (IS_ERR(new_pdev)) { + ret = PTR_ERR(new_pdev); + goto out; + } + new_pdev->dev.of_node = child; + of_dma_configure(&new_pdev->dev, child, true); + /* + * It is assumed that calling of_msi_configure is safe on + * platforms with or without MSI support. + */ + of_msi_configure(&new_pdev->dev, child); + } + + kfree(res); + + return ret; + +out: + of_node_put(child); + kfree(res); + + return ret; +} +#endif + +static int __init hidma_mgmt_init(void) +{ +#if defined(CONFIG_OF) && defined(CONFIG_OF_IRQ) + struct device_node *child; + + for_each_matching_node(child, hidma_mgmt_match) { + /* device tree based firmware here */ + hidma_mgmt_of_populate_channels(child); + } +#endif + /* + * We do not check for return value here, as it is assumed that + * platform_driver_register must not fail. The reason for this is that + * the (potential) hidma_mgmt_of_populate_channels calls above are not + * cleaned up if it does fail, and to do this work is quite + * complicated. In particular, various calls of of_address_to_resource, + * of_irq_to_resource, platform_device_register_full, of_dma_configure, + * and of_msi_configure which then call other functions and so on, must + * be cleaned up - this is not a trivial exercise. + * + * Currently, this module is not intended to be unloaded, and there is + * no module_exit function defined which does the needed cleanup. For + * this reason, we have to assume success here. + */ + platform_driver_register(&hidma_mgmt_driver); + + return 0; +} +module_init(hidma_mgmt_init); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3