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/amd/amdgpu/amdgpu_i2c.c | 394 ++++++++++++++++++++++++++++++++ 1 file changed, 394 insertions(+) create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_i2c.c (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_i2c.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_i2c.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_i2c.c new file mode 100644 index 000000000..82608df43 --- /dev/null +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_i2c.c @@ -0,0 +1,394 @@ +/* + * Copyright 2007-8 Advanced Micro Devices, Inc. + * Copyright 2008 Red Hat Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: Dave Airlie + * Alex Deucher + */ + +#include +#include + +#include +#include +#include "amdgpu.h" +#include "amdgpu_i2c.h" +#include "amdgpu_atombios.h" +#include "atom.h" +#include "atombios_dp.h" +#include "atombios_i2c.h" + +/* bit banging i2c */ +static int amdgpu_i2c_pre_xfer(struct i2c_adapter *i2c_adap) +{ + struct amdgpu_i2c_chan *i2c = i2c_get_adapdata(i2c_adap); + struct amdgpu_device *adev = drm_to_adev(i2c->dev); + struct amdgpu_i2c_bus_rec *rec = &i2c->rec; + uint32_t temp; + + mutex_lock(&i2c->mutex); + + /* switch the pads to ddc mode */ + if (rec->hw_capable) { + temp = RREG32(rec->mask_clk_reg); + temp &= ~(1 << 16); + WREG32(rec->mask_clk_reg, temp); + } + + /* clear the output pin values */ + temp = RREG32(rec->a_clk_reg) & ~rec->a_clk_mask; + WREG32(rec->a_clk_reg, temp); + + temp = RREG32(rec->a_data_reg) & ~rec->a_data_mask; + WREG32(rec->a_data_reg, temp); + + /* set the pins to input */ + temp = RREG32(rec->en_clk_reg) & ~rec->en_clk_mask; + WREG32(rec->en_clk_reg, temp); + + temp = RREG32(rec->en_data_reg) & ~rec->en_data_mask; + WREG32(rec->en_data_reg, temp); + + /* mask the gpio pins for software use */ + temp = RREG32(rec->mask_clk_reg) | rec->mask_clk_mask; + WREG32(rec->mask_clk_reg, temp); + temp = RREG32(rec->mask_clk_reg); + + temp = RREG32(rec->mask_data_reg) | rec->mask_data_mask; + WREG32(rec->mask_data_reg, temp); + temp = RREG32(rec->mask_data_reg); + + return 0; +} + +static void amdgpu_i2c_post_xfer(struct i2c_adapter *i2c_adap) +{ + struct amdgpu_i2c_chan *i2c = i2c_get_adapdata(i2c_adap); + struct amdgpu_device *adev = drm_to_adev(i2c->dev); + struct amdgpu_i2c_bus_rec *rec = &i2c->rec; + uint32_t temp; + + /* unmask the gpio pins for software use */ + temp = RREG32(rec->mask_clk_reg) & ~rec->mask_clk_mask; + WREG32(rec->mask_clk_reg, temp); + temp = RREG32(rec->mask_clk_reg); + + temp = RREG32(rec->mask_data_reg) & ~rec->mask_data_mask; + WREG32(rec->mask_data_reg, temp); + temp = RREG32(rec->mask_data_reg); + + mutex_unlock(&i2c->mutex); +} + +static int amdgpu_i2c_get_clock(void *i2c_priv) +{ + struct amdgpu_i2c_chan *i2c = i2c_priv; + struct amdgpu_device *adev = drm_to_adev(i2c->dev); + struct amdgpu_i2c_bus_rec *rec = &i2c->rec; + uint32_t val; + + /* read the value off the pin */ + val = RREG32(rec->y_clk_reg); + val &= rec->y_clk_mask; + + return (val != 0); +} + + +static int amdgpu_i2c_get_data(void *i2c_priv) +{ + struct amdgpu_i2c_chan *i2c = i2c_priv; + struct amdgpu_device *adev = drm_to_adev(i2c->dev); + struct amdgpu_i2c_bus_rec *rec = &i2c->rec; + uint32_t val; + + /* read the value off the pin */ + val = RREG32(rec->y_data_reg); + val &= rec->y_data_mask; + + return (val != 0); +} + +static void amdgpu_i2c_set_clock(void *i2c_priv, int clock) +{ + struct amdgpu_i2c_chan *i2c = i2c_priv; + struct amdgpu_device *adev = drm_to_adev(i2c->dev); + struct amdgpu_i2c_bus_rec *rec = &i2c->rec; + uint32_t val; + + /* set pin direction */ + val = RREG32(rec->en_clk_reg) & ~rec->en_clk_mask; + val |= clock ? 0 : rec->en_clk_mask; + WREG32(rec->en_clk_reg, val); +} + +static void amdgpu_i2c_set_data(void *i2c_priv, int data) +{ + struct amdgpu_i2c_chan *i2c = i2c_priv; + struct amdgpu_device *adev = drm_to_adev(i2c->dev); + struct amdgpu_i2c_bus_rec *rec = &i2c->rec; + uint32_t val; + + /* set pin direction */ + val = RREG32(rec->en_data_reg) & ~rec->en_data_mask; + val |= data ? 0 : rec->en_data_mask; + WREG32(rec->en_data_reg, val); +} + +static const struct i2c_algorithm amdgpu_atombios_i2c_algo = { + .master_xfer = amdgpu_atombios_i2c_xfer, + .functionality = amdgpu_atombios_i2c_func, +}; + +struct amdgpu_i2c_chan *amdgpu_i2c_create(struct drm_device *dev, + const struct amdgpu_i2c_bus_rec *rec, + const char *name) +{ + struct amdgpu_i2c_chan *i2c; + int ret; + + /* don't add the mm_i2c bus unless hw_i2c is enabled */ + if (rec->mm_i2c && (amdgpu_hw_i2c == 0)) + return NULL; + + i2c = kzalloc(sizeof(struct amdgpu_i2c_chan), GFP_KERNEL); + if (i2c == NULL) + return NULL; + + i2c->rec = *rec; + i2c->adapter.owner = THIS_MODULE; + i2c->adapter.class = I2C_CLASS_DDC; + i2c->adapter.dev.parent = dev->dev; + i2c->dev = dev; + i2c_set_adapdata(&i2c->adapter, i2c); + mutex_init(&i2c->mutex); + if (rec->hw_capable && + amdgpu_hw_i2c) { + /* hw i2c using atom */ + snprintf(i2c->adapter.name, sizeof(i2c->adapter.name), + "AMDGPU i2c hw bus %s", name); + i2c->adapter.algo = &amdgpu_atombios_i2c_algo; + ret = i2c_add_adapter(&i2c->adapter); + if (ret) + goto out_free; + } else { + /* set the amdgpu bit adapter */ + snprintf(i2c->adapter.name, sizeof(i2c->adapter.name), + "AMDGPU i2c bit bus %s", name); + i2c->adapter.algo_data = &i2c->bit; + i2c->bit.pre_xfer = amdgpu_i2c_pre_xfer; + i2c->bit.post_xfer = amdgpu_i2c_post_xfer; + i2c->bit.setsda = amdgpu_i2c_set_data; + i2c->bit.setscl = amdgpu_i2c_set_clock; + i2c->bit.getsda = amdgpu_i2c_get_data; + i2c->bit.getscl = amdgpu_i2c_get_clock; + i2c->bit.udelay = 10; + i2c->bit.timeout = usecs_to_jiffies(2200); /* from VESA */ + i2c->bit.data = i2c; + ret = i2c_bit_add_bus(&i2c->adapter); + if (ret) { + DRM_ERROR("Failed to register bit i2c %s\n", name); + goto out_free; + } + } + + return i2c; +out_free: + kfree(i2c); + return NULL; + +} + +void amdgpu_i2c_destroy(struct amdgpu_i2c_chan *i2c) +{ + if (!i2c) + return; + WARN_ON(i2c->has_aux); + i2c_del_adapter(&i2c->adapter); + kfree(i2c); +} + +/* Add the default buses */ +void amdgpu_i2c_init(struct amdgpu_device *adev) +{ + if (amdgpu_hw_i2c) + DRM_INFO("hw_i2c forced on, you may experience display detection problems!\n"); + + amdgpu_atombios_i2c_init(adev); +} + +/* remove all the buses */ +void amdgpu_i2c_fini(struct amdgpu_device *adev) +{ + int i; + + for (i = 0; i < AMDGPU_MAX_I2C_BUS; i++) { + if (adev->i2c_bus[i]) { + amdgpu_i2c_destroy(adev->i2c_bus[i]); + adev->i2c_bus[i] = NULL; + } + } +} + +/* Add additional buses */ +void amdgpu_i2c_add(struct amdgpu_device *adev, + const struct amdgpu_i2c_bus_rec *rec, + const char *name) +{ + struct drm_device *dev = adev_to_drm(adev); + int i; + + for (i = 0; i < AMDGPU_MAX_I2C_BUS; i++) { + if (!adev->i2c_bus[i]) { + adev->i2c_bus[i] = amdgpu_i2c_create(dev, rec, name); + return; + } + } +} + +/* looks up bus based on id */ +struct amdgpu_i2c_chan * +amdgpu_i2c_lookup(struct amdgpu_device *adev, + const struct amdgpu_i2c_bus_rec *i2c_bus) +{ + int i; + + for (i = 0; i < AMDGPU_MAX_I2C_BUS; i++) { + if (adev->i2c_bus[i] && + (adev->i2c_bus[i]->rec.i2c_id == i2c_bus->i2c_id)) { + return adev->i2c_bus[i]; + } + } + return NULL; +} + +static void amdgpu_i2c_get_byte(struct amdgpu_i2c_chan *i2c_bus, + u8 slave_addr, + u8 addr, + u8 *val) +{ + u8 out_buf[2]; + u8 in_buf[2]; + struct i2c_msg msgs[] = { + { + .addr = slave_addr, + .flags = 0, + .len = 1, + .buf = out_buf, + }, + { + .addr = slave_addr, + .flags = I2C_M_RD, + .len = 1, + .buf = in_buf, + } + }; + + out_buf[0] = addr; + out_buf[1] = 0; + + if (i2c_transfer(&i2c_bus->adapter, msgs, 2) == 2) { + *val = in_buf[0]; + DRM_DEBUG("val = 0x%02x\n", *val); + } else { + DRM_DEBUG("i2c 0x%02x 0x%02x read failed\n", + addr, *val); + } +} + +static void amdgpu_i2c_put_byte(struct amdgpu_i2c_chan *i2c_bus, + u8 slave_addr, + u8 addr, + u8 val) +{ + uint8_t out_buf[2]; + struct i2c_msg msg = { + .addr = slave_addr, + .flags = 0, + .len = 2, + .buf = out_buf, + }; + + out_buf[0] = addr; + out_buf[1] = val; + + if (i2c_transfer(&i2c_bus->adapter, &msg, 1) != 1) + DRM_DEBUG("i2c 0x%02x 0x%02x write failed\n", + addr, val); +} + +/* ddc router switching */ +void +amdgpu_i2c_router_select_ddc_port(const struct amdgpu_connector *amdgpu_connector) +{ + u8 val = 0; + + if (!amdgpu_connector->router.ddc_valid) + return; + + if (!amdgpu_connector->router_bus) + return; + + amdgpu_i2c_get_byte(amdgpu_connector->router_bus, + amdgpu_connector->router.i2c_addr, + 0x3, &val); + val &= ~amdgpu_connector->router.ddc_mux_control_pin; + amdgpu_i2c_put_byte(amdgpu_connector->router_bus, + amdgpu_connector->router.i2c_addr, + 0x3, val); + amdgpu_i2c_get_byte(amdgpu_connector->router_bus, + amdgpu_connector->router.i2c_addr, + 0x1, &val); + val &= ~amdgpu_connector->router.ddc_mux_control_pin; + val |= amdgpu_connector->router.ddc_mux_state; + amdgpu_i2c_put_byte(amdgpu_connector->router_bus, + amdgpu_connector->router.i2c_addr, + 0x1, val); +} + +/* clock/data router switching */ +void +amdgpu_i2c_router_select_cd_port(const struct amdgpu_connector *amdgpu_connector) +{ + u8 val; + + if (!amdgpu_connector->router.cd_valid) + return; + + if (!amdgpu_connector->router_bus) + return; + + amdgpu_i2c_get_byte(amdgpu_connector->router_bus, + amdgpu_connector->router.i2c_addr, + 0x3, &val); + val &= ~amdgpu_connector->router.cd_mux_control_pin; + amdgpu_i2c_put_byte(amdgpu_connector->router_bus, + amdgpu_connector->router.i2c_addr, + 0x3, val); + amdgpu_i2c_get_byte(amdgpu_connector->router_bus, + amdgpu_connector->router.i2c_addr, + 0x1, &val); + val &= ~amdgpu_connector->router.cd_mux_control_pin; + val |= amdgpu_connector->router.cd_mux_state; + amdgpu_i2c_put_byte(amdgpu_connector->router_bus, + amdgpu_connector->router.i2c_addr, + 0x1, val); +} -- cgit v1.2.3