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/media/v4l2-core/videobuf-vmalloc.c | 326 +++++++++++++++++++++++++++++ 1 file changed, 326 insertions(+) create mode 100644 drivers/media/v4l2-core/videobuf-vmalloc.c (limited to 'drivers/media/v4l2-core/videobuf-vmalloc.c') diff --git a/drivers/media/v4l2-core/videobuf-vmalloc.c b/drivers/media/v4l2-core/videobuf-vmalloc.c new file mode 100644 index 000000000..9b2443720 --- /dev/null +++ b/drivers/media/v4l2-core/videobuf-vmalloc.c @@ -0,0 +1,326 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * helper functions for vmalloc video4linux capture buffers + * + * The functions expect the hardware being able to scatter gather + * (i.e. the buffers are not linear in physical memory, but fragmented + * into PAGE_SIZE chunks). They also assume the driver does not need + * to touch the video data. + * + * (c) 2007 Mauro Carvalho Chehab + */ + +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#include + +#define MAGIC_DMABUF 0x17760309 +#define MAGIC_VMAL_MEM 0x18221223 + +#define MAGIC_CHECK(is, should) \ + if (unlikely((is) != (should))) { \ + printk(KERN_ERR "magic mismatch: %x (expected %x)\n", \ + is, should); \ + BUG(); \ + } + +static int debug; +module_param(debug, int, 0644); + +MODULE_DESCRIPTION("helper module to manage video4linux vmalloc buffers"); +MODULE_AUTHOR("Mauro Carvalho Chehab "); +MODULE_LICENSE("GPL"); + +#define dprintk(level, fmt, arg...) \ + if (debug >= level) \ + printk(KERN_DEBUG "vbuf-vmalloc: " fmt , ## arg) + + +/***************************************************************************/ + +static void videobuf_vm_open(struct vm_area_struct *vma) +{ + struct videobuf_mapping *map = vma->vm_private_data; + + dprintk(2, "vm_open %p [count=%u,vma=%08lx-%08lx]\n", map, + map->count, vma->vm_start, vma->vm_end); + + map->count++; +} + +static void videobuf_vm_close(struct vm_area_struct *vma) +{ + struct videobuf_mapping *map = vma->vm_private_data; + struct videobuf_queue *q = map->q; + int i; + + dprintk(2, "vm_close %p [count=%u,vma=%08lx-%08lx]\n", map, + map->count, vma->vm_start, vma->vm_end); + + map->count--; + if (0 == map->count) { + struct videobuf_vmalloc_memory *mem; + + dprintk(1, "munmap %p q=%p\n", map, q); + videobuf_queue_lock(q); + + /* We need first to cancel streams, before unmapping */ + if (q->streaming) + videobuf_queue_cancel(q); + + for (i = 0; i < VIDEO_MAX_FRAME; i++) { + if (NULL == q->bufs[i]) + continue; + + if (q->bufs[i]->map != map) + continue; + + mem = q->bufs[i]->priv; + if (mem) { + /* This callback is called only if kernel has + allocated memory and this memory is mmapped. + In this case, memory should be freed, + in order to do memory unmap. + */ + + MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM); + + /* vfree is not atomic - can't be + called with IRQ's disabled + */ + dprintk(1, "%s: buf[%d] freeing (%p)\n", + __func__, i, mem->vaddr); + + vfree(mem->vaddr); + mem->vaddr = NULL; + } + + q->bufs[i]->map = NULL; + q->bufs[i]->baddr = 0; + } + + kfree(map); + + videobuf_queue_unlock(q); + } + + return; +} + +static const struct vm_operations_struct videobuf_vm_ops = { + .open = videobuf_vm_open, + .close = videobuf_vm_close, +}; + +/* --------------------------------------------------------------------- + * vmalloc handlers for the generic methods + */ + +/* Allocated area consists on 3 parts: + struct video_buffer + struct _buffer (cx88_buffer, saa7134_buf, ...) + struct videobuf_dma_sg_memory + */ + +static struct videobuf_buffer *__videobuf_alloc_vb(size_t size) +{ + struct videobuf_vmalloc_memory *mem; + struct videobuf_buffer *vb; + + vb = kzalloc(size + sizeof(*mem), GFP_KERNEL); + if (!vb) + return vb; + + mem = vb->priv = ((char *)vb) + size; + mem->magic = MAGIC_VMAL_MEM; + + dprintk(1, "%s: allocated at %p(%ld+%ld) & %p(%ld)\n", + __func__, vb, (long)sizeof(*vb), (long)size - sizeof(*vb), + mem, (long)sizeof(*mem)); + + return vb; +} + +static int __videobuf_iolock(struct videobuf_queue *q, + struct videobuf_buffer *vb, + struct v4l2_framebuffer *fbuf) +{ + struct videobuf_vmalloc_memory *mem = vb->priv; + int pages; + + BUG_ON(!mem); + + MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM); + + switch (vb->memory) { + case V4L2_MEMORY_MMAP: + dprintk(1, "%s memory method MMAP\n", __func__); + + /* All handling should be done by __videobuf_mmap_mapper() */ + if (!mem->vaddr) { + printk(KERN_ERR "memory is not allocated/mmapped.\n"); + return -EINVAL; + } + break; + case V4L2_MEMORY_USERPTR: + pages = PAGE_ALIGN(vb->size); + + dprintk(1, "%s memory method USERPTR\n", __func__); + + if (vb->baddr) { + printk(KERN_ERR "USERPTR is currently not supported\n"); + return -EINVAL; + } + + /* The only USERPTR currently supported is the one needed for + * read() method. + */ + + mem->vaddr = vmalloc_user(pages); + if (!mem->vaddr) { + printk(KERN_ERR "vmalloc (%d pages) failed\n", pages); + return -ENOMEM; + } + dprintk(1, "vmalloc is at addr %p (%d pages)\n", + mem->vaddr, pages); + break; + case V4L2_MEMORY_OVERLAY: + default: + dprintk(1, "%s memory method OVERLAY/unknown\n", __func__); + + /* Currently, doesn't support V4L2_MEMORY_OVERLAY */ + printk(KERN_ERR "Memory method currently unsupported.\n"); + return -EINVAL; + } + + return 0; +} + +static int __videobuf_mmap_mapper(struct videobuf_queue *q, + struct videobuf_buffer *buf, + struct vm_area_struct *vma) +{ + struct videobuf_vmalloc_memory *mem; + struct videobuf_mapping *map; + int retval, pages; + + dprintk(1, "%s\n", __func__); + + /* create mapping + update buffer list */ + map = kzalloc(sizeof(struct videobuf_mapping), GFP_KERNEL); + if (NULL == map) + return -ENOMEM; + + buf->map = map; + map->q = q; + + buf->baddr = vma->vm_start; + + mem = buf->priv; + BUG_ON(!mem); + MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM); + + pages = PAGE_ALIGN(vma->vm_end - vma->vm_start); + mem->vaddr = vmalloc_user(pages); + if (!mem->vaddr) { + printk(KERN_ERR "vmalloc (%d pages) failed\n", pages); + goto error; + } + dprintk(1, "vmalloc is at addr %p (%d pages)\n", mem->vaddr, pages); + + /* Try to remap memory */ + retval = remap_vmalloc_range(vma, mem->vaddr, 0); + if (retval < 0) { + printk(KERN_ERR "mmap: remap failed with error %d. ", retval); + vfree(mem->vaddr); + goto error; + } + + vma->vm_ops = &videobuf_vm_ops; + vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; + vma->vm_private_data = map; + + dprintk(1, "mmap %p: q=%p %08lx-%08lx (%lx) pgoff %08lx buf %d\n", + map, q, vma->vm_start, vma->vm_end, + (long int)buf->bsize, + vma->vm_pgoff, buf->i); + + videobuf_vm_open(vma); + + return 0; + +error: + mem = NULL; + kfree(map); + return -ENOMEM; +} + +static struct videobuf_qtype_ops qops = { + .magic = MAGIC_QTYPE_OPS, + + .alloc_vb = __videobuf_alloc_vb, + .iolock = __videobuf_iolock, + .mmap_mapper = __videobuf_mmap_mapper, + .vaddr = videobuf_to_vmalloc, +}; + +void videobuf_queue_vmalloc_init(struct videobuf_queue *q, + const struct videobuf_queue_ops *ops, + struct device *dev, + spinlock_t *irqlock, + enum v4l2_buf_type type, + enum v4l2_field field, + unsigned int msize, + void *priv, + struct mutex *ext_lock) +{ + videobuf_queue_core_init(q, ops, dev, irqlock, type, field, msize, + priv, &qops, ext_lock); +} +EXPORT_SYMBOL_GPL(videobuf_queue_vmalloc_init); + +void *videobuf_to_vmalloc(struct videobuf_buffer *buf) +{ + struct videobuf_vmalloc_memory *mem = buf->priv; + BUG_ON(!mem); + MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM); + + return mem->vaddr; +} +EXPORT_SYMBOL_GPL(videobuf_to_vmalloc); + +void videobuf_vmalloc_free(struct videobuf_buffer *buf) +{ + struct videobuf_vmalloc_memory *mem = buf->priv; + + /* mmapped memory can't be freed here, otherwise mmapped region + would be released, while still needed. In this case, the memory + release should happen inside videobuf_vm_close(). + So, it should free memory only if the memory were allocated for + read() operation. + */ + if ((buf->memory != V4L2_MEMORY_USERPTR) || buf->baddr) + return; + + if (!mem) + return; + + MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM); + + vfree(mem->vaddr); + mem->vaddr = NULL; + + return; +} +EXPORT_SYMBOL_GPL(videobuf_vmalloc_free); + -- cgit v1.2.3