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/m68k/buddha-driver.rst | 209 +++++++++++++++++++++++++++++++++++ 1 file changed, 209 insertions(+) create mode 100644 Documentation/m68k/buddha-driver.rst (limited to 'Documentation/m68k/buddha-driver.rst') diff --git a/Documentation/m68k/buddha-driver.rst b/Documentation/m68k/buddha-driver.rst new file mode 100644 index 000000000..20e401413 --- /dev/null +++ b/Documentation/m68k/buddha-driver.rst @@ -0,0 +1,209 @@ +===================================== +Amiga Buddha and Catweasel IDE Driver +===================================== + +The Amiga Buddha and Catweasel IDE Driver (part of ide.c) was written by +Geert Uytterhoeven based on the following specifications: + +------------------------------------------------------------------------ + +Register map of the Buddha IDE controller and the +Buddha-part of the Catweasel Zorro-II version + +The Autoconfiguration has been implemented just as Commodore +described in their manuals, no tricks have been used (for +example leaving some address lines out of the equations...). +If you want to configure the board yourself (for example let +a Linux kernel configure the card), look at the Commodore +Docs. Reading the nibbles should give this information:: + + Vendor number: 4626 ($1212) + product number: 0 (42 for Catweasel Z-II) + Serial number: 0 + Rom-vector: $1000 + +The card should be a Z-II board, size 64K, not for freemem +list, Rom-Vektor is valid, no second Autoconfig-board on the +same card, no space preference, supports "Shutup_forever". + +Setting the base address should be done in two steps, just +as the Amiga Kickstart does: The lower nibble of the 8-Bit +address is written to $4a, then the whole Byte is written to +$48, while it doesn't matter how often you're writing to $4a +as long as $48 is not touched. After $48 has been written, +the whole card disappears from $e8 and is mapped to the new +address just written. Make sure $4a is written before $48, +otherwise your chance is only 1:16 to find the board :-). + +The local memory-map is even active when mapped to $e8: + +============== =========================================== +$0-$7e Autokonfig-space, see Z-II docs. + +$80-$7fd reserved + +$7fe Speed-select Register: Read & Write + (description see further down) + +$800-$8ff IDE-Select 0 (Port 0, Register set 0) + +$900-$9ff IDE-Select 1 (Port 0, Register set 1) + +$a00-$aff IDE-Select 2 (Port 1, Register set 0) + +$b00-$bff IDE-Select 3 (Port 1, Register set 1) + +$c00-$cff IDE-Select 4 (Port 2, Register set 0, + Catweasel only!) + +$d00-$dff IDE-Select 5 (Port 3, Register set 1, + Catweasel only!) + +$e00-$eff local expansion port, on Catweasel Z-II the + Catweasel registers are also mapped here. + Never touch, use multidisk.device! + +$f00 read only, Byte-access: Bit 7 shows the + level of the IRQ-line of IDE port 0. + +$f01-$f3f mirror of $f00 + +$f40 read only, Byte-access: Bit 7 shows the + level of the IRQ-line of IDE port 1. + +$f41-$f7f mirror of $f40 + +$f80 read only, Byte-access: Bit 7 shows the + level of the IRQ-line of IDE port 2. + (Catweasel only!) + +$f81-$fbf mirror of $f80 + +$fc0 write-only: Writing any value to this + register enables IRQs to be passed from the + IDE ports to the Zorro bus. This mechanism + has been implemented to be compatible with + harddisks that are either defective or have + a buggy firmware and pull the IRQ line up + while starting up. If interrupts would + always be passed to the bus, the computer + might not start up. Once enabled, this flag + can not be disabled again. The level of the + flag can not be determined by software + (what for? Write to me if it's necessary!). + +$fc1-$fff mirror of $fc0 + +$1000-$ffff Buddha-Rom with offset $1000 in the rom + chip. The addresses $0 to $fff of the rom + chip cannot be read. Rom is Byte-wide and + mapped to even addresses. +============== =========================================== + +The IDE ports issue an INT2. You can read the level of the +IRQ-lines of the IDE-ports by reading from the three (two +for Buddha-only) registers $f00, $f40 and $f80. This way +more than one I/O request can be handled and you can easily +determine what driver has to serve the INT2. Buddha and +Catweasel expansion boards can issue an INT6. A separate +memory map is available for the I/O module and the sysop's +I/O module. + +The IDE ports are fed by the address lines A2 to A4, just as +the Amiga 1200 and Amiga 4000 IDE ports are. This way +existing drivers can be easily ported to Buddha. A move.l +polls two words out of the same address of IDE port since +every word is mirrored once. movem is not possible, but +it's not necessary either, because you can only speedup +68000 systems with this technique. A 68020 system with +fastmem is faster with move.l. + +If you're using the mirrored registers of the IDE-ports with +A6=1, the Buddha doesn't care about the speed that you have +selected in the speed register (see further down). With +A6=1 (for example $840 for port 0, register set 0), a 780ns +access is being made. These registers should be used for a +command access to the harddisk/CD-Rom, since command +accesses are Byte-wide and have to be made slower according +to the ATA-X3T9 manual. + +Now for the speed-register: The register is byte-wide, and +only the upper three bits are used (Bits 7 to 5). Bit 4 +must always be set to 1 to be compatible with later Buddha +versions (if I'll ever update this one). I presume that +I'll never use the lower four bits, but they have to be set +to 1 by definition. + +The values in this table have to be shifted 5 bits to the +left and or'd with $1f (this sets the lower 5 bits). + +All the timings have in common: Select and IOR/IOW rise at +the same time. IOR and IOW have a propagation delay of +about 30ns to the clocks on the Zorro bus, that's why the +values are no multiple of 71. One clock-cycle is 71ns long +(exactly 70,5 at 14,18 Mhz on PAL systems). + +value 0 (Default after reset) + 497ns Select (7 clock cycles) , IOR/IOW after 172ns (2 clock cycles) + (same timing as the Amiga 1200 does on it's IDE port without + accelerator card) + +value 1 + 639ns Select (9 clock cycles), IOR/IOW after 243ns (3 clock cycles) + +value 2 + 781ns Select (11 clock cycles), IOR/IOW after 314ns (4 clock cycles) + +value 3 + 355ns Select (5 clock cycles), IOR/IOW after 101ns (1 clock cycle) + +value 4 + 355ns Select (5 clock cycles), IOR/IOW after 172ns (2 clock cycles) + +value 5 + 355ns Select (5 clock cycles), IOR/IOW after 243ns (3 clock cycles) + +value 6 + 1065ns Select (15 clock cycles), IOR/IOW after 314ns (4 clock cycles) + +value 7 + 355ns Select, (5 clock cycles), IOR/IOW after 101ns (1 clock cycle) + +When accessing IDE registers with A6=1 (for example $84x), +the timing will always be mode 0 8-bit compatible, no matter +what you have selected in the speed register: + +781ns select, IOR/IOW after 4 clock cycles (=314ns) aktive. + +All the timings with a very short select-signal (the 355ns +fast accesses) depend on the accelerator card used in the +system: Sometimes two more clock cycles are inserted by the +bus interface, making the whole access 497ns long. This +doesn't affect the reliability of the controller nor the +performance of the card, since this doesn't happen very +often. + +All the timings are calculated and only confirmed by +measurements that allowed me to count the clock cycles. If +the system is clocked by an oscillator other than 28,37516 +Mhz (for example the NTSC-frequency 28,63636 Mhz), each +clock cycle is shortened to a bit less than 70ns (not worth +mentioning). You could think of a small performance boost +by overclocking the system, but you would either need a +multisync monitor, or a graphics card, and your internal +diskdrive would go crazy, that's why you shouldn't tune your +Amiga this way. + +Giving you the possibility to write software that is +compatible with both the Buddha and the Catweasel Z-II, The +Buddha acts just like a Catweasel Z-II with no device +connected to the third IDE-port. The IRQ-register $f80 +always shows a "no IRQ here" on the Buddha, and accesses to +the third IDE port are going into data's Nirwana on the +Buddha. + +Jens Schönfeld february 19th, 1997 + +updated may 27th, 1997 + +eMail: sysop@nostlgic.tng.oche.de -- cgit v1.2.3