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/i915/intel_pcode.c | 248 +++++++++++++++++++++++++++++++++++++ 1 file changed, 248 insertions(+) create mode 100644 drivers/gpu/drm/i915/intel_pcode.c (limited to 'drivers/gpu/drm/i915/intel_pcode.c') diff --git a/drivers/gpu/drm/i915/intel_pcode.c b/drivers/gpu/drm/i915/intel_pcode.c new file mode 100644 index 000000000..a234d9b4e --- /dev/null +++ b/drivers/gpu/drm/i915/intel_pcode.c @@ -0,0 +1,248 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2013-2021 Intel Corporation + */ + +#include "i915_drv.h" +#include "i915_reg.h" +#include "intel_pcode.h" + +static int gen6_check_mailbox_status(u32 mbox) +{ + switch (mbox & GEN6_PCODE_ERROR_MASK) { + case GEN6_PCODE_SUCCESS: + return 0; + case GEN6_PCODE_UNIMPLEMENTED_CMD: + return -ENODEV; + case GEN6_PCODE_ILLEGAL_CMD: + return -ENXIO; + case GEN6_PCODE_MIN_FREQ_TABLE_GT_RATIO_OUT_OF_RANGE: + case GEN7_PCODE_MIN_FREQ_TABLE_GT_RATIO_OUT_OF_RANGE: + return -EOVERFLOW; + case GEN6_PCODE_TIMEOUT: + return -ETIMEDOUT; + default: + MISSING_CASE(mbox & GEN6_PCODE_ERROR_MASK); + return 0; + } +} + +static int gen7_check_mailbox_status(u32 mbox) +{ + switch (mbox & GEN6_PCODE_ERROR_MASK) { + case GEN6_PCODE_SUCCESS: + return 0; + case GEN6_PCODE_ILLEGAL_CMD: + return -ENXIO; + case GEN7_PCODE_TIMEOUT: + return -ETIMEDOUT; + case GEN7_PCODE_ILLEGAL_DATA: + return -EINVAL; + case GEN11_PCODE_ILLEGAL_SUBCOMMAND: + return -ENXIO; + case GEN11_PCODE_LOCKED: + return -EBUSY; + case GEN11_PCODE_REJECTED: + return -EACCES; + case GEN7_PCODE_MIN_FREQ_TABLE_GT_RATIO_OUT_OF_RANGE: + return -EOVERFLOW; + default: + MISSING_CASE(mbox & GEN6_PCODE_ERROR_MASK); + return 0; + } +} + +static int __snb_pcode_rw(struct intel_uncore *uncore, u32 mbox, + u32 *val, u32 *val1, + int fast_timeout_us, int slow_timeout_ms, + bool is_read) +{ + lockdep_assert_held(&uncore->i915->sb_lock); + + /* + * GEN6_PCODE_* are outside of the forcewake domain, we can use + * intel_uncore_read/write_fw variants to reduce the amount of work + * required when reading/writing. + */ + + if (intel_uncore_read_fw(uncore, GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) + return -EAGAIN; + + intel_uncore_write_fw(uncore, GEN6_PCODE_DATA, *val); + intel_uncore_write_fw(uncore, GEN6_PCODE_DATA1, val1 ? *val1 : 0); + intel_uncore_write_fw(uncore, + GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | mbox); + + if (__intel_wait_for_register_fw(uncore, + GEN6_PCODE_MAILBOX, + GEN6_PCODE_READY, 0, + fast_timeout_us, + slow_timeout_ms, + &mbox)) + return -ETIMEDOUT; + + if (is_read) + *val = intel_uncore_read_fw(uncore, GEN6_PCODE_DATA); + if (is_read && val1) + *val1 = intel_uncore_read_fw(uncore, GEN6_PCODE_DATA1); + + if (GRAPHICS_VER(uncore->i915) > 6) + return gen7_check_mailbox_status(mbox); + else + return gen6_check_mailbox_status(mbox); +} + +int snb_pcode_read(struct intel_uncore *uncore, u32 mbox, u32 *val, u32 *val1) +{ + int err; + + mutex_lock(&uncore->i915->sb_lock); + err = __snb_pcode_rw(uncore, mbox, val, val1, 500, 20, true); + mutex_unlock(&uncore->i915->sb_lock); + + if (err) { + drm_dbg(&uncore->i915->drm, + "warning: pcode (read from mbox %x) mailbox access failed for %ps: %d\n", + mbox, __builtin_return_address(0), err); + } + + return err; +} + +int snb_pcode_write_timeout(struct intel_uncore *uncore, u32 mbox, u32 val, + int fast_timeout_us, int slow_timeout_ms) +{ + int err; + + mutex_lock(&uncore->i915->sb_lock); + err = __snb_pcode_rw(uncore, mbox, &val, NULL, + fast_timeout_us, slow_timeout_ms, false); + mutex_unlock(&uncore->i915->sb_lock); + + if (err) { + drm_dbg(&uncore->i915->drm, + "warning: pcode (write of 0x%08x to mbox %x) mailbox access failed for %ps: %d\n", + val, mbox, __builtin_return_address(0), err); + } + + return err; +} + +static bool skl_pcode_try_request(struct intel_uncore *uncore, u32 mbox, + u32 request, u32 reply_mask, u32 reply, + u32 *status) +{ + *status = __snb_pcode_rw(uncore, mbox, &request, NULL, 500, 0, true); + + return (*status == 0) && ((request & reply_mask) == reply); +} + +/** + * skl_pcode_request - send PCODE request until acknowledgment + * @uncore: uncore + * @mbox: PCODE mailbox ID the request is targeted for + * @request: request ID + * @reply_mask: mask used to check for request acknowledgment + * @reply: value used to check for request acknowledgment + * @timeout_base_ms: timeout for polling with preemption enabled + * + * Keep resending the @request to @mbox until PCODE acknowledges it, PCODE + * reports an error or an overall timeout of @timeout_base_ms+50 ms expires. + * The request is acknowledged once the PCODE reply dword equals @reply after + * applying @reply_mask. Polling is first attempted with preemption enabled + * for @timeout_base_ms and if this times out for another 50 ms with + * preemption disabled. + * + * Returns 0 on success, %-ETIMEDOUT in case of a timeout, <0 in case of some + * other error as reported by PCODE. + */ +int skl_pcode_request(struct intel_uncore *uncore, u32 mbox, u32 request, + u32 reply_mask, u32 reply, int timeout_base_ms) +{ + u32 status; + int ret; + + mutex_lock(&uncore->i915->sb_lock); + +#define COND \ + skl_pcode_try_request(uncore, mbox, request, reply_mask, reply, &status) + + /* + * Prime the PCODE by doing a request first. Normally it guarantees + * that a subsequent request, at most @timeout_base_ms later, succeeds. + * _wait_for() doesn't guarantee when its passed condition is evaluated + * first, so send the first request explicitly. + */ + if (COND) { + ret = 0; + goto out; + } + ret = _wait_for(COND, timeout_base_ms * 1000, 10, 10); + if (!ret) + goto out; + + /* + * The above can time out if the number of requests was low (2 in the + * worst case) _and_ PCODE was busy for some reason even after a + * (queued) request and @timeout_base_ms delay. As a workaround retry + * the poll with preemption disabled to maximize the number of + * requests. Increase the timeout from @timeout_base_ms to 50ms to + * account for interrupts that could reduce the number of these + * requests, and for any quirks of the PCODE firmware that delays + * the request completion. + */ + drm_dbg_kms(&uncore->i915->drm, + "PCODE timeout, retrying with preemption disabled\n"); + drm_WARN_ON_ONCE(&uncore->i915->drm, timeout_base_ms > 3); + preempt_disable(); + ret = wait_for_atomic(COND, 50); + preempt_enable(); + +out: + mutex_unlock(&uncore->i915->sb_lock); + return status ? status : ret; +#undef COND +} + +int intel_pcode_init(struct intel_uncore *uncore) +{ + if (!IS_DGFX(uncore->i915)) + return 0; + + return skl_pcode_request(uncore, DG1_PCODE_STATUS, + DG1_UNCORE_GET_INIT_STATUS, + DG1_UNCORE_INIT_STATUS_COMPLETE, + DG1_UNCORE_INIT_STATUS_COMPLETE, 180000); +} + +int snb_pcode_read_p(struct intel_uncore *uncore, u32 mbcmd, u32 p1, u32 p2, u32 *val) +{ + intel_wakeref_t wakeref; + u32 mbox; + int err; + + mbox = REG_FIELD_PREP(GEN6_PCODE_MB_COMMAND, mbcmd) + | REG_FIELD_PREP(GEN6_PCODE_MB_PARAM1, p1) + | REG_FIELD_PREP(GEN6_PCODE_MB_PARAM2, p2); + + with_intel_runtime_pm(uncore->rpm, wakeref) + err = snb_pcode_read(uncore, mbox, val, NULL); + + return err; +} + +int snb_pcode_write_p(struct intel_uncore *uncore, u32 mbcmd, u32 p1, u32 p2, u32 val) +{ + intel_wakeref_t wakeref; + u32 mbox; + int err; + + mbox = REG_FIELD_PREP(GEN6_PCODE_MB_COMMAND, mbcmd) + | REG_FIELD_PREP(GEN6_PCODE_MB_PARAM1, p1) + | REG_FIELD_PREP(GEN6_PCODE_MB_PARAM2, p2); + + with_intel_runtime_pm(uncore->rpm, wakeref) + err = snb_pcode_write(uncore, mbox, val); + + return err; +} -- cgit v1.2.3