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authorLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
committerLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
commit5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch)
treecc5c2d0a898769fd59549594fedb3ee6f84e59a0 /arch/arm/mach-omap1/ams-delta-fiq-handler.S
downloadlinux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.tar.gz
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Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted
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(). ...
Diffstat (limited to 'arch/arm/mach-omap1/ams-delta-fiq-handler.S')
-rw-r--r--arch/arm/mach-omap1/ams-delta-fiq-handler.S275
1 files changed, 275 insertions, 0 deletions
diff --git a/arch/arm/mach-omap1/ams-delta-fiq-handler.S b/arch/arm/mach-omap1/ams-delta-fiq-handler.S
new file mode 100644
index 000000000..35c2f9574
--- /dev/null
+++ b/arch/arm/mach-omap1/ams-delta-fiq-handler.S
@@ -0,0 +1,275 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * linux/arch/arm/mach-omap1/ams-delta-fiq-handler.S
+ *
+ * Based on linux/arch/arm/lib/floppydma.S
+ * Renamed and modified to work with 2.6 kernel by Matt Callow
+ * Copyright (C) 1995, 1996 Russell King
+ * Copyright (C) 2004 Pete Trapps
+ * Copyright (C) 2006 Matt Callow
+ * Copyright (C) 2010 Janusz Krzysztofik
+ */
+
+#include <linux/linkage.h>
+#include <linux/platform_data/ams-delta-fiq.h>
+#include <linux/platform_data/gpio-omap.h>
+#include <linux/soc/ti/omap1-io.h>
+
+#include <asm/assembler.h>
+#include <asm/irq.h>
+
+#include "hardware.h"
+#include "ams-delta-fiq.h"
+#include "board-ams-delta.h"
+#include "iomap.h"
+
+/*
+ * OMAP1510 GPIO related symbol copied from arch/arm/mach-omap1/gpio15xx.c.
+ * Unfortunately, it was not placed in a separate header file.
+ */
+#define OMAP1510_GPIO_BASE 0xFFFCE000
+
+/* GPIO register bitmasks */
+#define KEYBRD_DATA_MASK (0x1 << AMS_DELTA_GPIO_PIN_KEYBRD_DATA)
+#define KEYBRD_CLK_MASK (0x1 << AMS_DELTA_GPIO_PIN_KEYBRD_CLK)
+#define MODEM_IRQ_MASK (0x1 << AMS_DELTA_GPIO_PIN_MODEM_IRQ)
+#define HOOK_SWITCH_MASK (0x1 << AMS_DELTA_GPIO_PIN_HOOK_SWITCH)
+#define OTHERS_MASK (MODEM_IRQ_MASK | HOOK_SWITCH_MASK)
+
+/* IRQ handler register bitmasks */
+#define DEFERRED_FIQ_MASK OMAP_IRQ_BIT(INT_DEFERRED_FIQ)
+#define GPIO_BANK1_MASK OMAP_IRQ_BIT(INT_GPIO_BANK1)
+
+/* Driver buffer byte offsets */
+#define BUF_MASK (FIQ_MASK * 4)
+#define BUF_STATE (FIQ_STATE * 4)
+#define BUF_KEYS_CNT (FIQ_KEYS_CNT * 4)
+#define BUF_TAIL_OFFSET (FIQ_TAIL_OFFSET * 4)
+#define BUF_HEAD_OFFSET (FIQ_HEAD_OFFSET * 4)
+#define BUF_BUF_LEN (FIQ_BUF_LEN * 4)
+#define BUF_KEY (FIQ_KEY * 4)
+#define BUF_MISSED_KEYS (FIQ_MISSED_KEYS * 4)
+#define BUF_BUFFER_START (FIQ_BUFFER_START * 4)
+#define BUF_GPIO_INT_MASK (FIQ_GPIO_INT_MASK * 4)
+#define BUF_KEYS_HICNT (FIQ_KEYS_HICNT * 4)
+#define BUF_IRQ_PEND (FIQ_IRQ_PEND * 4)
+#define BUF_SIR_CODE_L1 (FIQ_SIR_CODE_L1 * 4)
+#define BUF_SIR_CODE_L2 (IRQ_SIR_CODE_L2 * 4)
+#define BUF_CNT_INT_00 (FIQ_CNT_INT_00 * 4)
+#define BUF_CNT_INT_KEY (FIQ_CNT_INT_KEY * 4)
+#define BUF_CNT_INT_MDM (FIQ_CNT_INT_MDM * 4)
+#define BUF_CNT_INT_03 (FIQ_CNT_INT_03 * 4)
+#define BUF_CNT_INT_HSW (FIQ_CNT_INT_HSW * 4)
+#define BUF_CNT_INT_05 (FIQ_CNT_INT_05 * 4)
+#define BUF_CNT_INT_06 (FIQ_CNT_INT_06 * 4)
+#define BUF_CNT_INT_07 (FIQ_CNT_INT_07 * 4)
+#define BUF_CNT_INT_08 (FIQ_CNT_INT_08 * 4)
+#define BUF_CNT_INT_09 (FIQ_CNT_INT_09 * 4)
+#define BUF_CNT_INT_10 (FIQ_CNT_INT_10 * 4)
+#define BUF_CNT_INT_11 (FIQ_CNT_INT_11 * 4)
+#define BUF_CNT_INT_12 (FIQ_CNT_INT_12 * 4)
+#define BUF_CNT_INT_13 (FIQ_CNT_INT_13 * 4)
+#define BUF_CNT_INT_14 (FIQ_CNT_INT_14 * 4)
+#define BUF_CNT_INT_15 (FIQ_CNT_INT_15 * 4)
+#define BUF_CIRC_BUFF (FIQ_CIRC_BUFF * 4)
+
+
+/*
+ * Register usage
+ * r8 - temporary
+ * r9 - the driver buffer
+ * r10 - temporary
+ * r11 - interrupts mask
+ * r12 - base pointers
+ * r13 - interrupts status
+ */
+
+ .text
+
+ .global qwerty_fiqin_end
+
+ENTRY(qwerty_fiqin_start)
+ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
+ @ FIQ intrrupt handler
+ ldr r12, omap_ih1_base @ set pointer to level1 handler
+
+ ldr r11, [r12, #IRQ_MIR_REG_OFFSET] @ fetch interrupts mask
+
+ ldr r13, [r12, #IRQ_ITR_REG_OFFSET] @ fetch interrupts status
+ bics r13, r13, r11 @ clear masked - any left?
+ beq exit @ none - spurious FIQ? exit
+
+ ldr r10, [r12, #IRQ_SIR_FIQ_REG_OFFSET] @ get requested interrupt number
+
+ mov r8, #2 @ reset FIQ agreement
+ str r8, [r12, #IRQ_CONTROL_REG_OFFSET]
+
+ cmp r10, #(INT_GPIO_BANK1 - NR_IRQS_LEGACY) @ is it GPIO interrupt?
+ beq gpio @ yes - process it
+
+ mov r8, #1
+ orr r8, r11, r8, lsl r10 @ mask spurious interrupt
+ str r8, [r12, #IRQ_MIR_REG_OFFSET]
+exit:
+ subs pc, lr, #4 @ return from FIQ
+ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
+
+
+ @@@@@@@@@@@@@@@@@@@@@@@@@@@
+gpio: @ GPIO bank interrupt handler
+ ldr r12, omap1510_gpio_base @ set base pointer to GPIO bank
+
+ ldr r11, [r12, #OMAP1510_GPIO_INT_MASK] @ fetch GPIO interrupts mask
+restart:
+ ldr r13, [r12, #OMAP1510_GPIO_INT_STATUS] @ fetch status bits
+ bics r13, r13, r11 @ clear masked - any left?
+ beq exit @ no - spurious interrupt? exit
+
+ orr r11, r11, r13 @ mask all requested interrupts
+ str r11, [r12, #OMAP1510_GPIO_INT_MASK]
+
+ str r13, [r12, #OMAP1510_GPIO_INT_STATUS] @ ack all requested interrupts
+
+ ands r10, r13, #KEYBRD_CLK_MASK @ extract keyboard status - set?
+ beq hksw @ no - try next source
+
+
+ @@@@@@@@@@@@@@@@@@@@@@
+ @ Keyboard clock FIQ mode interrupt handler
+ @ r10 now contains KEYBRD_CLK_MASK, use it
+ bic r11, r11, r10 @ unmask it
+ str r11, [r12, #OMAP1510_GPIO_INT_MASK]
+
+ @ Process keyboard data
+ ldr r8, [r12, #OMAP1510_GPIO_DATA_INPUT] @ fetch GPIO input
+
+ ldr r10, [r9, #BUF_STATE] @ fetch kbd interface state
+ cmp r10, #0 @ are we expecting start bit?
+ bne data @ no - go to data processing
+
+ ands r8, r8, #KEYBRD_DATA_MASK @ check start bit - detected?
+ beq hksw @ no - try next source
+
+ @ r8 contains KEYBRD_DATA_MASK, use it
+ str r8, [r9, #BUF_STATE] @ enter data processing state
+ @ r10 already contains 0, reuse it
+ str r10, [r9, #BUF_KEY] @ clear keycode
+ mov r10, #2 @ reset input bit mask
+ str r10, [r9, #BUF_MASK]
+
+ @ Mask other GPIO line interrupts till key done
+ str r11, [r9, #BUF_GPIO_INT_MASK] @ save mask for later restore
+ mvn r11, #KEYBRD_CLK_MASK @ prepare all except kbd mask
+ str r11, [r12, #OMAP1510_GPIO_INT_MASK] @ store into the mask register
+
+ b restart @ restart
+
+data: ldr r10, [r9, #BUF_MASK] @ fetch current input bit mask
+
+ @ r8 still contains GPIO input bits
+ ands r8, r8, #KEYBRD_DATA_MASK @ is keyboard data line low?
+ ldreq r8, [r9, #BUF_KEY] @ yes - fetch collected so far,
+ orreq r8, r8, r10 @ set 1 at current mask position
+ streq r8, [r9, #BUF_KEY] @ and save back
+
+ mov r10, r10, lsl #1 @ shift mask left
+ bics r10, r10, #0x800 @ have we got all the bits?
+ strne r10, [r9, #BUF_MASK] @ not yet - store the mask
+ bne restart @ and restart
+
+ @ r10 already contains 0, reuse it
+ str r10, [r9, #BUF_STATE] @ reset state to start
+
+ @ Key done - restore interrupt mask
+ ldr r10, [r9, #BUF_GPIO_INT_MASK] @ fetch saved mask
+ and r11, r11, r10 @ unmask all saved as unmasked
+ str r11, [r12, #OMAP1510_GPIO_INT_MASK] @ restore into the mask register
+
+ @ Try appending the keycode to the circular buffer
+ ldr r10, [r9, #BUF_KEYS_CNT] @ get saved keystrokes count
+ ldr r8, [r9, #BUF_BUF_LEN] @ get buffer size
+ cmp r10, r8 @ is buffer full?
+ beq hksw @ yes - key lost, next source
+
+ add r10, r10, #1 @ incremet keystrokes counter
+ str r10, [r9, #BUF_KEYS_CNT]
+
+ ldr r10, [r9, #BUF_TAIL_OFFSET] @ get buffer tail offset
+ @ r8 already contains buffer size
+ cmp r10, r8 @ end of buffer?
+ moveq r10, #0 @ yes - rewind to buffer start
+
+ ldr r12, [r9, #BUF_BUFFER_START] @ get buffer start address
+ add r12, r12, r10, LSL #2 @ calculate buffer tail address
+ ldr r8, [r9, #BUF_KEY] @ get last keycode
+ str r8, [r12] @ append it to the buffer tail
+
+ add r10, r10, #1 @ increment buffer tail offset
+ str r10, [r9, #BUF_TAIL_OFFSET]
+
+ ldr r10, [r9, #BUF_CNT_INT_KEY] @ increment interrupts counter
+ add r10, r10, #1
+ str r10, [r9, #BUF_CNT_INT_KEY]
+ @@@@@@@@@@@@@@@@@@@@@@@@
+
+
+hksw: @Is hook switch interrupt requested?
+ tst r13, #HOOK_SWITCH_MASK @ is hook switch status bit set?
+ beq mdm @ no - try next source
+
+
+ @@@@@@@@@@@@@@@@@@@@@@@@
+ @ Hook switch interrupt FIQ mode simple handler
+
+ @ Don't toggle active edge, the switch always bounces
+
+ @ Increment hook switch interrupt counter
+ ldr r10, [r9, #BUF_CNT_INT_HSW]
+ add r10, r10, #1
+ str r10, [r9, #BUF_CNT_INT_HSW]
+ @@@@@@@@@@@@@@@@@@@@@@@@
+
+
+mdm: @Is it a modem interrupt?
+ tst r13, #MODEM_IRQ_MASK @ is modem status bit set?
+ beq irq @ no - check for next interrupt
+
+
+ @@@@@@@@@@@@@@@@@@@@@@@@
+ @ Modem FIQ mode interrupt handler stub
+
+ @ Increment modem interrupt counter
+ ldr r10, [r9, #BUF_CNT_INT_MDM]
+ add r10, r10, #1
+ str r10, [r9, #BUF_CNT_INT_MDM]
+ @@@@@@@@@@@@@@@@@@@@@@@@
+
+
+irq: @ Place deferred_fiq interrupt request
+ ldr r12, deferred_fiq_ih_base @ set pointer to IRQ handler
+ mov r10, #DEFERRED_FIQ_MASK @ set deferred_fiq bit
+ str r10, [r12, #IRQ_ISR_REG_OFFSET] @ place it in the ISR register
+
+ ldr r12, omap1510_gpio_base @ set pointer back to GPIO bank
+ b restart @ check for next GPIO interrupt
+ @@@@@@@@@@@@@@@@@@@@@@@@@@@
+
+
+/*
+ * Virtual addresses for IO
+ */
+omap_ih1_base:
+ .word OMAP1_IO_ADDRESS(OMAP_IH1_BASE)
+deferred_fiq_ih_base:
+ .word OMAP1_IO_ADDRESS(DEFERRED_FIQ_IH_BASE)
+omap1510_gpio_base:
+ .word OMAP1_IO_ADDRESS(OMAP1510_GPIO_BASE)
+qwerty_fiqin_end:
+
+/*
+ * Check the size of the FIQ,
+ * it cannot go beyond 0xffff0200, and is copied to 0xffff001c
+ */
+.if (qwerty_fiqin_end - qwerty_fiqin_start) > (0x200 - 0x1c)
+ .err
+.endif