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/pci/saa7164/saa7164-buffer.c | 305 +++++++++++++++++++++++++++++ 1 file changed, 305 insertions(+) create mode 100644 drivers/media/pci/saa7164/saa7164-buffer.c (limited to 'drivers/media/pci/saa7164/saa7164-buffer.c') diff --git a/drivers/media/pci/saa7164/saa7164-buffer.c b/drivers/media/pci/saa7164/saa7164-buffer.c new file mode 100644 index 000000000..89c5b79a5 --- /dev/null +++ b/drivers/media/pci/saa7164/saa7164-buffer.c @@ -0,0 +1,305 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Driver for the NXP SAA7164 PCIe bridge + * + * Copyright (c) 2010-2015 Steven Toth + */ + +#include + +#include "saa7164.h" + +/* The PCI address space for buffer handling looks like this: + * + * +-u32 wide-------------+ + * | + + * +-u64 wide------------------------------------+ + * + + + * +----------------------+ + * | CurrentBufferPtr + Pointer to current PCI buffer >-+ + * +----------------------+ | + * | Unused + | + * +----------------------+ | + * | Pitch + = 188 (bytes) | + * +----------------------+ | + * | PCI buffer size + = pitch * number of lines (312) | + * +----------------------+ | + * |0| Buf0 Write Offset + | + * +----------------------+ v + * |1| Buf1 Write Offset + | + * +----------------------+ | + * |2| Buf2 Write Offset + | + * +----------------------+ | + * |3| Buf3 Write Offset + | + * +----------------------+ | + * ... More write offsets | + * +---------------------------------------------+ | + * +0| set of ptrs to PCI pagetables + | + * +---------------------------------------------+ | + * +1| set of ptrs to PCI pagetables + <--------+ + * +---------------------------------------------+ + * +2| set of ptrs to PCI pagetables + + * +---------------------------------------------+ + * +3| set of ptrs to PCI pagetables + >--+ + * +---------------------------------------------+ | + * ... More buffer pointers | +----------------+ + * +->| pt[0] TS data | + * | +----------------+ + * | + * | +----------------+ + * +->| pt[1] TS data | + * | +----------------+ + * | etc + */ + +void saa7164_buffer_display(struct saa7164_buffer *buf) +{ + struct saa7164_dev *dev = buf->port->dev; + int i; + + dprintk(DBGLVL_BUF, "%s() buffer @ 0x%p nr=%d\n", + __func__, buf, buf->idx); + dprintk(DBGLVL_BUF, " pci_cpu @ 0x%p dma @ 0x%08llx len = 0x%x\n", + buf->cpu, (long long)buf->dma, buf->pci_size); + dprintk(DBGLVL_BUF, " pt_cpu @ 0x%p pt_dma @ 0x%08llx len = 0x%x\n", + buf->pt_cpu, (long long)buf->pt_dma, buf->pt_size); + + /* Format the Page Table Entries to point into the data buffer */ + for (i = 0 ; i < SAA7164_PT_ENTRIES; i++) { + + dprintk(DBGLVL_BUF, " pt[%02d] = 0x%p -> 0x%llx\n", + i, buf->pt_cpu, (u64)*(buf->pt_cpu)); + + } +} +/* Allocate a new buffer structure and associated PCI space in bytes. + * len must be a multiple of sizeof(u64) + */ +struct saa7164_buffer *saa7164_buffer_alloc(struct saa7164_port *port, + u32 len) +{ + struct tmHWStreamParameters *params = &port->hw_streamingparams; + struct saa7164_buffer *buf = NULL; + struct saa7164_dev *dev = port->dev; + int i; + + if ((len == 0) || (len >= 65536) || (len % sizeof(u64))) { + log_warn("%s() SAA_ERR_BAD_PARAMETER\n", __func__); + goto ret; + } + + buf = kzalloc(sizeof(*buf), GFP_KERNEL); + if (!buf) + goto ret; + + buf->idx = -1; + buf->port = port; + buf->flags = SAA7164_BUFFER_FREE; + buf->pos = 0; + buf->actual_size = params->pitch * params->numberoflines; + buf->crc = 0; + /* TODO: arg len is being ignored */ + buf->pci_size = SAA7164_PT_ENTRIES * 0x1000; + buf->pt_size = (SAA7164_PT_ENTRIES * sizeof(u64)) + 0x1000; + + /* Allocate contiguous memory */ + buf->cpu = dma_alloc_coherent(&port->dev->pci->dev, buf->pci_size, + &buf->dma, GFP_KERNEL); + if (!buf->cpu) + goto fail1; + + buf->pt_cpu = dma_alloc_coherent(&port->dev->pci->dev, buf->pt_size, + &buf->pt_dma, GFP_KERNEL); + if (!buf->pt_cpu) + goto fail2; + + /* init the buffers to a known pattern, easier during debugging */ + memset(buf->cpu, 0xff, buf->pci_size); + buf->crc = crc32(0, buf->cpu, buf->actual_size); + memset(buf->pt_cpu, 0xff, buf->pt_size); + + dprintk(DBGLVL_BUF, "%s() allocated buffer @ 0x%p (%d pageptrs)\n", + __func__, buf, params->numpagetables); + dprintk(DBGLVL_BUF, " pci_cpu @ 0x%p dma @ 0x%08lx len = 0x%x\n", + buf->cpu, (long)buf->dma, buf->pci_size); + dprintk(DBGLVL_BUF, " pt_cpu @ 0x%p pt_dma @ 0x%08lx len = 0x%x\n", + buf->pt_cpu, (long)buf->pt_dma, buf->pt_size); + + /* Format the Page Table Entries to point into the data buffer */ + for (i = 0 ; i < params->numpagetables; i++) { + + *(buf->pt_cpu + i) = buf->dma + (i * 0x1000); /* TODO */ + dprintk(DBGLVL_BUF, " pt[%02d] = 0x%p -> 0x%llx\n", + i, buf->pt_cpu, (u64)*(buf->pt_cpu)); + + } + + goto ret; + +fail2: + dma_free_coherent(&port->dev->pci->dev, buf->pci_size, buf->cpu, + buf->dma); +fail1: + kfree(buf); + + buf = NULL; +ret: + return buf; +} + +int saa7164_buffer_dealloc(struct saa7164_buffer *buf) +{ + struct saa7164_dev *dev; + + if (!buf || !buf->port) + return SAA_ERR_BAD_PARAMETER; + dev = buf->port->dev; + + dprintk(DBGLVL_BUF, "%s() deallocating buffer @ 0x%p\n", + __func__, buf); + + if (buf->flags != SAA7164_BUFFER_FREE) + log_warn(" freeing a non-free buffer\n"); + + dma_free_coherent(&dev->pci->dev, buf->pci_size, buf->cpu, buf->dma); + dma_free_coherent(&dev->pci->dev, buf->pt_size, buf->pt_cpu, + buf->pt_dma); + + kfree(buf); + + return SAA_OK; +} + +int saa7164_buffer_zero_offsets(struct saa7164_port *port, int i) +{ + struct saa7164_dev *dev = port->dev; + + if ((i < 0) || (i >= port->hwcfg.buffercount)) + return -EINVAL; + + dprintk(DBGLVL_BUF, "%s(idx = %d)\n", __func__, i); + + saa7164_writel(port->bufoffset + (sizeof(u32) * i), 0); + + return 0; +} + +/* Write a buffer into the hardware */ +int saa7164_buffer_activate(struct saa7164_buffer *buf, int i) +{ + struct saa7164_port *port = buf->port; + struct saa7164_dev *dev = port->dev; + + if ((i < 0) || (i >= port->hwcfg.buffercount)) + return -EINVAL; + + dprintk(DBGLVL_BUF, "%s(idx = %d)\n", __func__, i); + + buf->idx = i; /* Note of which buffer list index position we occupy */ + buf->flags = SAA7164_BUFFER_BUSY; + buf->pos = 0; + + /* TODO: Review this in light of 32v64 assignments */ + saa7164_writel(port->bufoffset + (sizeof(u32) * i), 0); + saa7164_writel(port->bufptr32h + ((sizeof(u32) * 2) * i), buf->pt_dma); + saa7164_writel(port->bufptr32l + ((sizeof(u32) * 2) * i), 0); + + dprintk(DBGLVL_BUF, " buf[%d] offset 0x%llx (0x%x) buf 0x%llx/%llx (0x%x/%x) nr=%d\n", + buf->idx, + (u64)port->bufoffset + (i * sizeof(u32)), + saa7164_readl(port->bufoffset + (sizeof(u32) * i)), + (u64)port->bufptr32h + ((sizeof(u32) * 2) * i), + (u64)port->bufptr32l + ((sizeof(u32) * 2) * i), + saa7164_readl(port->bufptr32h + ((sizeof(u32) * i) * 2)), + saa7164_readl(port->bufptr32l + ((sizeof(u32) * i) * 2)), + buf->idx); + + return 0; +} + +int saa7164_buffer_cfg_port(struct saa7164_port *port) +{ + struct tmHWStreamParameters *params = &port->hw_streamingparams; + struct saa7164_dev *dev = port->dev; + struct saa7164_buffer *buf; + struct list_head *c, *n; + int i = 0; + + dprintk(DBGLVL_BUF, "%s(port=%d)\n", __func__, port->nr); + + saa7164_writel(port->bufcounter, 0); + saa7164_writel(port->pitch, params->pitch); + saa7164_writel(port->bufsize, params->pitch * params->numberoflines); + + dprintk(DBGLVL_BUF, " configured:\n"); + dprintk(DBGLVL_BUF, " lmmio 0x%p\n", dev->lmmio); + dprintk(DBGLVL_BUF, " bufcounter 0x%x = 0x%x\n", port->bufcounter, + saa7164_readl(port->bufcounter)); + + dprintk(DBGLVL_BUF, " pitch 0x%x = %d\n", port->pitch, + saa7164_readl(port->pitch)); + + dprintk(DBGLVL_BUF, " bufsize 0x%x = %d\n", port->bufsize, + saa7164_readl(port->bufsize)); + + dprintk(DBGLVL_BUF, " buffercount = %d\n", port->hwcfg.buffercount); + dprintk(DBGLVL_BUF, " bufoffset = 0x%x\n", port->bufoffset); + dprintk(DBGLVL_BUF, " bufptr32h = 0x%x\n", port->bufptr32h); + dprintk(DBGLVL_BUF, " bufptr32l = 0x%x\n", port->bufptr32l); + + /* Poke the buffers and offsets into PCI space */ + mutex_lock(&port->dmaqueue_lock); + list_for_each_safe(c, n, &port->dmaqueue.list) { + buf = list_entry(c, struct saa7164_buffer, list); + + BUG_ON(buf->flags != SAA7164_BUFFER_FREE); + + /* Place the buffer in the h/w queue */ + saa7164_buffer_activate(buf, i); + + /* Don't exceed the device maximum # bufs */ + BUG_ON(i > port->hwcfg.buffercount); + i++; + + } + mutex_unlock(&port->dmaqueue_lock); + + return 0; +} + +struct saa7164_user_buffer *saa7164_buffer_alloc_user(struct saa7164_dev *dev, + u32 len) +{ + struct saa7164_user_buffer *buf; + + buf = kzalloc(sizeof(*buf), GFP_KERNEL); + if (!buf) + return NULL; + + buf->data = kzalloc(len, GFP_KERNEL); + + if (!buf->data) { + kfree(buf); + return NULL; + } + + buf->actual_size = len; + buf->pos = 0; + buf->crc = 0; + + dprintk(DBGLVL_BUF, "%s() allocated user buffer @ 0x%p\n", + __func__, buf); + + return buf; +} + +void saa7164_buffer_dealloc_user(struct saa7164_user_buffer *buf) +{ + if (!buf) + return; + + kfree(buf->data); + buf->data = NULL; + + kfree(buf); +} -- cgit v1.2.3