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(). ... --- Documentation/fb/intel810.rst | 287 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 287 insertions(+) create mode 100644 Documentation/fb/intel810.rst (limited to 'Documentation/fb/intel810.rst') diff --git a/Documentation/fb/intel810.rst b/Documentation/fb/intel810.rst new file mode 100644 index 000000000..eb86098db --- /dev/null +++ b/Documentation/fb/intel810.rst @@ -0,0 +1,287 @@ +================================ +Intel 810/815 Framebuffer driver +================================ + +Tony Daplas + +http://i810fb.sourceforge.net + +March 17, 2002 + +First Released: July 2001 +Last Update: September 12, 2005 + +A. Introduction +=============== + + This is a framebuffer driver for various Intel 810/815 compatible + graphics devices. These include: + + - Intel 810 + - Intel 810E + - Intel 810-DC100 + - Intel 815 Internal graphics only, 100Mhz FSB + - Intel 815 Internal graphics only + - Intel 815 Internal graphics and AGP + +B. Features +============ + + - Choice of using Discrete Video Timings, VESA Generalized Timing + Formula, or a framebuffer specific database to set the video mode + + - Supports a variable range of horizontal and vertical resolution and + vertical refresh rates if the VESA Generalized Timing Formula is + enabled. + + - Supports color depths of 8, 16, 24 and 32 bits per pixel + + - Supports pseudocolor, directcolor, or truecolor visuals + + - Full and optimized hardware acceleration at 8, 16 and 24 bpp + + - Robust video state save and restore + + - MTRR support + + - Utilizes user-entered monitor specifications to automatically + calculate required video mode parameters. + + - Can concurrently run with xfree86 running with native i810 drivers + + - Hardware Cursor Support + + - Supports EDID probing either by DDC/I2C or through the BIOS + +C. List of available options +============================= + + a. "video=i810fb" + enables the i810 driver + + Recommendation: required + + b. "xres:" + select horizontal resolution in pixels. (This parameter will be + ignored if 'mode_option' is specified. See 'o' below). + + Recommendation: user preference + (default = 640) + + c. "yres:" + select vertical resolution in scanlines. If Discrete Video Timings + is enabled, this will be ignored and computed as 3*xres/4. (This + parameter will be ignored if 'mode_option' is specified. See 'o' + below) + + Recommendation: user preference + (default = 480) + + d. "vyres:" + select virtual vertical resolution in scanlines. If (0) or none + is specified, this will be computed against maximum available memory. + + Recommendation: do not set + (default = 480) + + e. "vram:" + select amount of system RAM in MB to allocate for the video memory + + Recommendation: 1 - 4 MB. + (default = 4) + + f. "bpp:" + select desired pixel depth + + Recommendation: 8 + (default = 8) + + g. "hsync1/hsync2:" + select the minimum and maximum Horizontal Sync Frequency of the + monitor in kHz. If using a fixed frequency monitor, hsync1 must + be equal to hsync2. If EDID probing is successful, these will be + ignored and values will be taken from the EDID block. + + Recommendation: check monitor manual for correct values + (default = 29/30) + + h. "vsync1/vsync2:" + select the minimum and maximum Vertical Sync Frequency of the monitor + in Hz. You can also use this option to lock your monitor's refresh + rate. If EDID probing is successful, these will be ignored and values + will be taken from the EDID block. + + Recommendation: check monitor manual for correct values + (default = 60/60) + + IMPORTANT: If you need to clamp your timings, try to give some + leeway for computational errors (over/underflows). Example: if + using vsync1/vsync2 = 60/60, make sure hsync1/hsync2 has at least + a 1 unit difference, and vice versa. + + i. "voffset:" + select at what offset in MB of the logical memory to allocate the + framebuffer memory. The intent is to avoid the memory blocks + used by standard graphics applications (XFree86). The default + offset (16 MB for a 64 MB aperture, 8 MB for a 32 MB aperture) will + avoid XFree86's usage and allows up to 7 MB/15 MB of framebuffer + memory. Depending on your usage, adjust the value up or down + (0 for maximum usage, 31/63 MB for the least amount). Note, an + arbitrary setting may conflict with XFree86. + + Recommendation: do not set + (default = 8 or 16 MB) + + j. "accel" + enable text acceleration. This can be enabled/reenabled anytime + by using 'fbset -accel true/false'. + + Recommendation: enable + (default = not set) + + k. "mtrr" + enable MTRR. This allows data transfers to the framebuffer memory + to occur in bursts which can significantly increase performance. + Not very helpful with the i810/i815 because of 'shared memory'. + + Recommendation: do not set + (default = not set) + + l. "extvga" + if specified, secondary/external VGA output will always be enabled. + Useful if the BIOS turns off the VGA port when no monitor is attached. + The external VGA monitor can then be attached without rebooting. + + Recommendation: do not set + (default = not set) + + m. "sync" + Forces the hardware engine to do a "sync" or wait for the hardware + to finish before starting another instruction. This will produce a + more stable setup, but will be slower. + + Recommendation: do not set + (default = not set) + + n. "dcolor" + Use directcolor visual instead of truecolor for pixel depths greater + than 8 bpp. Useful for color tuning, such as gamma control. + + Recommendation: do not set + (default = not set) + + o. x[-][@] + The driver will now accept specification of boot mode option. If this + is specified, the options 'xres' and 'yres' will be ignored. See + Documentation/fb/modedb.rst for usage. + +D. Kernel booting +================= + +Separate each option/option-pair by commas (,) and the option from its value +with a colon (:) as in the following:: + + video=i810fb:option1,option2:value2 + +Sample Usage +------------ + +In /etc/lilo.conf, add the line:: + + append="video=i810fb:vram:2,xres:1024,yres:768,bpp:8,hsync1:30,hsync2:55, \ + vsync1:50,vsync2:85,accel,mtrr" + +This will initialize the framebuffer to 1024x768 at 8bpp. The framebuffer +will use 2 MB of System RAM. MTRR support will be enabled. The refresh rate +will be computed based on the hsync1/hsync2 and vsync1/vsync2 values. + +IMPORTANT: + You must include hsync1, hsync2, vsync1 and vsync2 to enable video modes + better than 640x480 at 60Hz. HOWEVER, if your chipset/display combination + supports I2C and has an EDID block, you can safely exclude hsync1, hsync2, + vsync1 and vsync2 parameters. These parameters will be taken from the EDID + block. + +E. Module options +================== + +The module parameters are essentially similar to the kernel +parameters. The main difference is that you need to include a Boolean value +(1 for TRUE, and 0 for FALSE) for those options which don't need a value. + +Example, to enable MTRR, include "mtrr=1". + +Sample Usage +------------ + +Using the same setup as described above, load the module like this:: + + modprobe i810fb vram=2 xres=1024 bpp=8 hsync1=30 hsync2=55 vsync1=50 \ + vsync2=85 accel=1 mtrr=1 + +Or just add the following to a configuration file in /etc/modprobe.d/:: + + options i810fb vram=2 xres=1024 bpp=16 hsync1=30 hsync2=55 vsync1=50 \ + vsync2=85 accel=1 mtrr=1 + +and just do a:: + + modprobe i810fb + + +F. Setup +========= + + a. Do your usual method of configuring the kernel + + make menuconfig/xconfig/config + + b. Under "Code maturity level options" enable "Prompt for development + and/or incomplete code/drivers". + + c. Enable agpgart support for the Intel 810/815 on-board graphics. + This is required. The option is under "Character Devices". + + d. Under "Graphics Support", select "Intel 810/815" either statically + or as a module. Choose "use VESA Generalized Timing Formula" if + you need to maximize the capability of your display. To be on the + safe side, you can leave this unselected. + + e. If you want support for DDC/I2C probing (Plug and Play Displays), + set 'Enable DDC Support' to 'y'. To make this option appear, set + 'use VESA Generalized Timing Formula' to 'y'. + + f. If you want a framebuffer console, enable it under "Console + Drivers". + + g. Compile your kernel. + + h. Load the driver as described in sections D and E. + + i. Try the DirectFB (http://www.directfb.org) + the i810 gfxdriver + patch to see the chipset in action (or inaction :-). + +G. Acknowledgment: +=================== + + 1. Geert Uytterhoeven - his excellent howto and the virtual + framebuffer driver code made this possible. + + 2. Jeff Hartmann for his agpgart code. + + 3. The X developers. Insights were provided just by reading the + XFree86 source code. + + 4. Intel(c). For this value-oriented chipset driver and for + providing documentation. + + 5. Matt Sottek. His inputs and ideas helped in making some + optimizations possible. + +H. Home Page: +============== + + A more complete, and probably updated information is provided at + http://i810fb.sourceforge.net. + +Tony -- cgit v1.2.3