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/gpu/drm/v3d/v3d_mmu.c | 125 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 125 insertions(+) create mode 100644 drivers/gpu/drm/v3d/v3d_mmu.c (limited to 'drivers/gpu/drm/v3d/v3d_mmu.c') diff --git a/drivers/gpu/drm/v3d/v3d_mmu.c b/drivers/gpu/drm/v3d/v3d_mmu.c new file mode 100644 index 000000000..5a4535329 --- /dev/null +++ b/drivers/gpu/drm/v3d/v3d_mmu.c @@ -0,0 +1,125 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* Copyright (C) 2017-2018 Broadcom */ + +/** + * DOC: Broadcom V3D MMU + * + * The V3D 3.x hardware (compared to VC4) now includes an MMU. It has + * a single level of page tables for the V3D's 4GB address space to + * map to AXI bus addresses, thus it could need up to 4MB of + * physically contiguous memory to store the PTEs. + * + * Because the 4MB of contiguous memory for page tables is precious, + * and switching between them is expensive, we load all BOs into the + * same 4GB address space. + * + * To protect clients from each other, we should use the GMP to + * quickly mask out (at 128kb granularity) what pages are available to + * each client. This is not yet implemented. + */ + +#include "v3d_drv.h" +#include "v3d_regs.h" + +#define V3D_MMU_PAGE_SHIFT 12 + +/* Note: All PTEs for the 1MB superpage must be filled with the + * superpage bit set. + */ +#define V3D_PTE_SUPERPAGE BIT(31) +#define V3D_PTE_WRITEABLE BIT(29) +#define V3D_PTE_VALID BIT(28) + +static int v3d_mmu_flush_all(struct v3d_dev *v3d) +{ + int ret; + + /* Make sure that another flush isn't already running when we + * start this one. + */ + ret = wait_for(!(V3D_READ(V3D_MMU_CTL) & + V3D_MMU_CTL_TLB_CLEARING), 100); + if (ret) + dev_err(v3d->drm.dev, "TLB clear wait idle pre-wait failed\n"); + + V3D_WRITE(V3D_MMU_CTL, V3D_READ(V3D_MMU_CTL) | + V3D_MMU_CTL_TLB_CLEAR); + + V3D_WRITE(V3D_MMUC_CONTROL, + V3D_MMUC_CONTROL_FLUSH | + V3D_MMUC_CONTROL_ENABLE); + + ret = wait_for(!(V3D_READ(V3D_MMU_CTL) & + V3D_MMU_CTL_TLB_CLEARING), 100); + if (ret) { + dev_err(v3d->drm.dev, "TLB clear wait idle failed\n"); + return ret; + } + + ret = wait_for(!(V3D_READ(V3D_MMUC_CONTROL) & + V3D_MMUC_CONTROL_FLUSHING), 100); + if (ret) + dev_err(v3d->drm.dev, "MMUC flush wait idle failed\n"); + + return ret; +} + +int v3d_mmu_set_page_table(struct v3d_dev *v3d) +{ + V3D_WRITE(V3D_MMU_PT_PA_BASE, v3d->pt_paddr >> V3D_MMU_PAGE_SHIFT); + V3D_WRITE(V3D_MMU_CTL, + V3D_MMU_CTL_ENABLE | + V3D_MMU_CTL_PT_INVALID_ENABLE | + V3D_MMU_CTL_PT_INVALID_ABORT | + V3D_MMU_CTL_PT_INVALID_INT | + V3D_MMU_CTL_WRITE_VIOLATION_ABORT | + V3D_MMU_CTL_WRITE_VIOLATION_INT | + V3D_MMU_CTL_CAP_EXCEEDED_ABORT | + V3D_MMU_CTL_CAP_EXCEEDED_INT); + V3D_WRITE(V3D_MMU_ILLEGAL_ADDR, + (v3d->mmu_scratch_paddr >> V3D_MMU_PAGE_SHIFT) | + V3D_MMU_ILLEGAL_ADDR_ENABLE); + V3D_WRITE(V3D_MMUC_CONTROL, V3D_MMUC_CONTROL_ENABLE); + + return v3d_mmu_flush_all(v3d); +} + +void v3d_mmu_insert_ptes(struct v3d_bo *bo) +{ + struct drm_gem_shmem_object *shmem_obj = &bo->base; + struct v3d_dev *v3d = to_v3d_dev(shmem_obj->base.dev); + u32 page = bo->node.start; + u32 page_prot = V3D_PTE_WRITEABLE | V3D_PTE_VALID; + struct sg_dma_page_iter dma_iter; + + for_each_sgtable_dma_page(shmem_obj->sgt, &dma_iter, 0) { + dma_addr_t dma_addr = sg_page_iter_dma_address(&dma_iter); + u32 page_address = dma_addr >> V3D_MMU_PAGE_SHIFT; + u32 pte = page_prot | page_address; + u32 i; + + BUG_ON(page_address + (PAGE_SIZE >> V3D_MMU_PAGE_SHIFT) >= + BIT(24)); + for (i = 0; i < PAGE_SIZE >> V3D_MMU_PAGE_SHIFT; i++) + v3d->pt[page++] = pte + i; + } + + WARN_ON_ONCE(page - bo->node.start != + shmem_obj->base.size >> V3D_MMU_PAGE_SHIFT); + + if (v3d_mmu_flush_all(v3d)) + dev_err(v3d->drm.dev, "MMU flush timeout\n"); +} + +void v3d_mmu_remove_ptes(struct v3d_bo *bo) +{ + struct v3d_dev *v3d = to_v3d_dev(bo->base.base.dev); + u32 npages = bo->base.base.size >> V3D_MMU_PAGE_SHIFT; + u32 page; + + for (page = bo->node.start; page < bo->node.start + npages; page++) + v3d->pt[page] = 0; + + if (v3d_mmu_flush_all(v3d)) + dev_err(v3d->drm.dev, "MMU flush timeout\n"); +} -- cgit v1.2.3