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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 /drivers/clocksource/timer-sun5i.c
downloadlinux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.tar.gz
linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.zip
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 'drivers/clocksource/timer-sun5i.c')
-rw-r--r--drivers/clocksource/timer-sun5i.c372
1 files changed, 372 insertions, 0 deletions
diff --git a/drivers/clocksource/timer-sun5i.c b/drivers/clocksource/timer-sun5i.c
new file mode 100644
index 000000000..7d5fa9069
--- /dev/null
+++ b/drivers/clocksource/timer-sun5i.c
@@ -0,0 +1,372 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Allwinner SoCs hstimer driver.
+ *
+ * Copyright (C) 2013 Maxime Ripard
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/clockchips.h>
+#include <linux/clocksource.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/irqreturn.h>
+#include <linux/reset.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+
+#define TIMER_IRQ_EN_REG 0x00
+#define TIMER_IRQ_EN(val) BIT(val)
+#define TIMER_IRQ_ST_REG 0x04
+#define TIMER_CTL_REG(val) (0x20 * (val) + 0x10)
+#define TIMER_CTL_ENABLE BIT(0)
+#define TIMER_CTL_RELOAD BIT(1)
+#define TIMER_CTL_CLK_PRES(val) (((val) & 0x7) << 4)
+#define TIMER_CTL_ONESHOT BIT(7)
+#define TIMER_INTVAL_LO_REG(val) (0x20 * (val) + 0x14)
+#define TIMER_INTVAL_HI_REG(val) (0x20 * (val) + 0x18)
+#define TIMER_CNTVAL_LO_REG(val) (0x20 * (val) + 0x1c)
+#define TIMER_CNTVAL_HI_REG(val) (0x20 * (val) + 0x20)
+
+#define TIMER_SYNC_TICKS 3
+
+struct sun5i_timer {
+ void __iomem *base;
+ struct clk *clk;
+ struct notifier_block clk_rate_cb;
+ u32 ticks_per_jiffy;
+};
+
+#define to_sun5i_timer(x) \
+ container_of(x, struct sun5i_timer, clk_rate_cb)
+
+struct sun5i_timer_clksrc {
+ struct sun5i_timer timer;
+ struct clocksource clksrc;
+};
+
+#define to_sun5i_timer_clksrc(x) \
+ container_of(x, struct sun5i_timer_clksrc, clksrc)
+
+struct sun5i_timer_clkevt {
+ struct sun5i_timer timer;
+ struct clock_event_device clkevt;
+};
+
+#define to_sun5i_timer_clkevt(x) \
+ container_of(x, struct sun5i_timer_clkevt, clkevt)
+
+/*
+ * When we disable a timer, we need to wait at least for 2 cycles of
+ * the timer source clock. We will use for that the clocksource timer
+ * that is already setup and runs at the same frequency than the other
+ * timers, and we never will be disabled.
+ */
+static void sun5i_clkevt_sync(struct sun5i_timer_clkevt *ce)
+{
+ u32 old = readl(ce->timer.base + TIMER_CNTVAL_LO_REG(1));
+
+ while ((old - readl(ce->timer.base + TIMER_CNTVAL_LO_REG(1))) < TIMER_SYNC_TICKS)
+ cpu_relax();
+}
+
+static void sun5i_clkevt_time_stop(struct sun5i_timer_clkevt *ce, u8 timer)
+{
+ u32 val = readl(ce->timer.base + TIMER_CTL_REG(timer));
+ writel(val & ~TIMER_CTL_ENABLE, ce->timer.base + TIMER_CTL_REG(timer));
+
+ sun5i_clkevt_sync(ce);
+}
+
+static void sun5i_clkevt_time_setup(struct sun5i_timer_clkevt *ce, u8 timer, u32 delay)
+{
+ writel(delay, ce->timer.base + TIMER_INTVAL_LO_REG(timer));
+}
+
+static void sun5i_clkevt_time_start(struct sun5i_timer_clkevt *ce, u8 timer, bool periodic)
+{
+ u32 val = readl(ce->timer.base + TIMER_CTL_REG(timer));
+
+ if (periodic)
+ val &= ~TIMER_CTL_ONESHOT;
+ else
+ val |= TIMER_CTL_ONESHOT;
+
+ writel(val | TIMER_CTL_ENABLE | TIMER_CTL_RELOAD,
+ ce->timer.base + TIMER_CTL_REG(timer));
+}
+
+static int sun5i_clkevt_shutdown(struct clock_event_device *clkevt)
+{
+ struct sun5i_timer_clkevt *ce = to_sun5i_timer_clkevt(clkevt);
+
+ sun5i_clkevt_time_stop(ce, 0);
+ return 0;
+}
+
+static int sun5i_clkevt_set_oneshot(struct clock_event_device *clkevt)
+{
+ struct sun5i_timer_clkevt *ce = to_sun5i_timer_clkevt(clkevt);
+
+ sun5i_clkevt_time_stop(ce, 0);
+ sun5i_clkevt_time_start(ce, 0, false);
+ return 0;
+}
+
+static int sun5i_clkevt_set_periodic(struct clock_event_device *clkevt)
+{
+ struct sun5i_timer_clkevt *ce = to_sun5i_timer_clkevt(clkevt);
+
+ sun5i_clkevt_time_stop(ce, 0);
+ sun5i_clkevt_time_setup(ce, 0, ce->timer.ticks_per_jiffy);
+ sun5i_clkevt_time_start(ce, 0, true);
+ return 0;
+}
+
+static int sun5i_clkevt_next_event(unsigned long evt,
+ struct clock_event_device *clkevt)
+{
+ struct sun5i_timer_clkevt *ce = to_sun5i_timer_clkevt(clkevt);
+
+ sun5i_clkevt_time_stop(ce, 0);
+ sun5i_clkevt_time_setup(ce, 0, evt - TIMER_SYNC_TICKS);
+ sun5i_clkevt_time_start(ce, 0, false);
+
+ return 0;
+}
+
+static irqreturn_t sun5i_timer_interrupt(int irq, void *dev_id)
+{
+ struct sun5i_timer_clkevt *ce = dev_id;
+
+ writel(0x1, ce->timer.base + TIMER_IRQ_ST_REG);
+ ce->clkevt.event_handler(&ce->clkevt);
+
+ return IRQ_HANDLED;
+}
+
+static u64 sun5i_clksrc_read(struct clocksource *clksrc)
+{
+ struct sun5i_timer_clksrc *cs = to_sun5i_timer_clksrc(clksrc);
+
+ return ~readl(cs->timer.base + TIMER_CNTVAL_LO_REG(1));
+}
+
+static int sun5i_rate_cb_clksrc(struct notifier_block *nb,
+ unsigned long event, void *data)
+{
+ struct clk_notifier_data *ndata = data;
+ struct sun5i_timer *timer = to_sun5i_timer(nb);
+ struct sun5i_timer_clksrc *cs = container_of(timer, struct sun5i_timer_clksrc, timer);
+
+ switch (event) {
+ case PRE_RATE_CHANGE:
+ clocksource_unregister(&cs->clksrc);
+ break;
+
+ case POST_RATE_CHANGE:
+ clocksource_register_hz(&cs->clksrc, ndata->new_rate);
+ break;
+
+ default:
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+static int __init sun5i_setup_clocksource(struct device_node *node,
+ void __iomem *base,
+ struct clk *clk, int irq)
+{
+ struct sun5i_timer_clksrc *cs;
+ unsigned long rate;
+ int ret;
+
+ cs = kzalloc(sizeof(*cs), GFP_KERNEL);
+ if (!cs)
+ return -ENOMEM;
+
+ ret = clk_prepare_enable(clk);
+ if (ret) {
+ pr_err("Couldn't enable parent clock\n");
+ goto err_free;
+ }
+
+ rate = clk_get_rate(clk);
+ if (!rate) {
+ pr_err("Couldn't get parent clock rate\n");
+ ret = -EINVAL;
+ goto err_disable_clk;
+ }
+
+ cs->timer.base = base;
+ cs->timer.clk = clk;
+ cs->timer.clk_rate_cb.notifier_call = sun5i_rate_cb_clksrc;
+ cs->timer.clk_rate_cb.next = NULL;
+
+ ret = clk_notifier_register(clk, &cs->timer.clk_rate_cb);
+ if (ret) {
+ pr_err("Unable to register clock notifier.\n");
+ goto err_disable_clk;
+ }
+
+ writel(~0, base + TIMER_INTVAL_LO_REG(1));
+ writel(TIMER_CTL_ENABLE | TIMER_CTL_RELOAD,
+ base + TIMER_CTL_REG(1));
+
+ cs->clksrc.name = node->name;
+ cs->clksrc.rating = 340;
+ cs->clksrc.read = sun5i_clksrc_read;
+ cs->clksrc.mask = CLOCKSOURCE_MASK(32);
+ cs->clksrc.flags = CLOCK_SOURCE_IS_CONTINUOUS;
+
+ ret = clocksource_register_hz(&cs->clksrc, rate);
+ if (ret) {
+ pr_err("Couldn't register clock source.\n");
+ goto err_remove_notifier;
+ }
+
+ return 0;
+
+err_remove_notifier:
+ clk_notifier_unregister(clk, &cs->timer.clk_rate_cb);
+err_disable_clk:
+ clk_disable_unprepare(clk);
+err_free:
+ kfree(cs);
+ return ret;
+}
+
+static int sun5i_rate_cb_clkevt(struct notifier_block *nb,
+ unsigned long event, void *data)
+{
+ struct clk_notifier_data *ndata = data;
+ struct sun5i_timer *timer = to_sun5i_timer(nb);
+ struct sun5i_timer_clkevt *ce = container_of(timer, struct sun5i_timer_clkevt, timer);
+
+ if (event == POST_RATE_CHANGE) {
+ clockevents_update_freq(&ce->clkevt, ndata->new_rate);
+ ce->timer.ticks_per_jiffy = DIV_ROUND_UP(ndata->new_rate, HZ);
+ }
+
+ return NOTIFY_DONE;
+}
+
+static int __init sun5i_setup_clockevent(struct device_node *node, void __iomem *base,
+ struct clk *clk, int irq)
+{
+ struct sun5i_timer_clkevt *ce;
+ unsigned long rate;
+ int ret;
+ u32 val;
+
+ ce = kzalloc(sizeof(*ce), GFP_KERNEL);
+ if (!ce)
+ return -ENOMEM;
+
+ ret = clk_prepare_enable(clk);
+ if (ret) {
+ pr_err("Couldn't enable parent clock\n");
+ goto err_free;
+ }
+
+ rate = clk_get_rate(clk);
+ if (!rate) {
+ pr_err("Couldn't get parent clock rate\n");
+ ret = -EINVAL;
+ goto err_disable_clk;
+ }
+
+ ce->timer.base = base;
+ ce->timer.ticks_per_jiffy = DIV_ROUND_UP(rate, HZ);
+ ce->timer.clk = clk;
+ ce->timer.clk_rate_cb.notifier_call = sun5i_rate_cb_clkevt;
+ ce->timer.clk_rate_cb.next = NULL;
+
+ ret = clk_notifier_register(clk, &ce->timer.clk_rate_cb);
+ if (ret) {
+ pr_err("Unable to register clock notifier.\n");
+ goto err_disable_clk;
+ }
+
+ ce->clkevt.name = node->name;
+ ce->clkevt.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT;
+ ce->clkevt.set_next_event = sun5i_clkevt_next_event;
+ ce->clkevt.set_state_shutdown = sun5i_clkevt_shutdown;
+ ce->clkevt.set_state_periodic = sun5i_clkevt_set_periodic;
+ ce->clkevt.set_state_oneshot = sun5i_clkevt_set_oneshot;
+ ce->clkevt.tick_resume = sun5i_clkevt_shutdown;
+ ce->clkevt.rating = 340;
+ ce->clkevt.irq = irq;
+ ce->clkevt.cpumask = cpu_possible_mask;
+
+ /* Enable timer0 interrupt */
+ val = readl(base + TIMER_IRQ_EN_REG);
+ writel(val | TIMER_IRQ_EN(0), base + TIMER_IRQ_EN_REG);
+
+ clockevents_config_and_register(&ce->clkevt, rate,
+ TIMER_SYNC_TICKS, 0xffffffff);
+
+ ret = request_irq(irq, sun5i_timer_interrupt, IRQF_TIMER | IRQF_IRQPOLL,
+ "sun5i_timer0", ce);
+ if (ret) {
+ pr_err("Unable to register interrupt\n");
+ goto err_remove_notifier;
+ }
+
+ return 0;
+
+err_remove_notifier:
+ clk_notifier_unregister(clk, &ce->timer.clk_rate_cb);
+err_disable_clk:
+ clk_disable_unprepare(clk);
+err_free:
+ kfree(ce);
+ return ret;
+}
+
+static int __init sun5i_timer_init(struct device_node *node)
+{
+ struct reset_control *rstc;
+ void __iomem *timer_base;
+ struct clk *clk;
+ int irq, ret;
+
+ timer_base = of_io_request_and_map(node, 0, of_node_full_name(node));
+ if (IS_ERR(timer_base)) {
+ pr_err("Can't map registers\n");
+ return PTR_ERR(timer_base);
+ }
+
+ irq = irq_of_parse_and_map(node, 0);
+ if (irq <= 0) {
+ pr_err("Can't parse IRQ\n");
+ return -EINVAL;
+ }
+
+ clk = of_clk_get(node, 0);
+ if (IS_ERR(clk)) {
+ pr_err("Can't get timer clock\n");
+ return PTR_ERR(clk);
+ }
+
+ rstc = of_reset_control_get(node, NULL);
+ if (!IS_ERR(rstc))
+ reset_control_deassert(rstc);
+
+ ret = sun5i_setup_clocksource(node, timer_base, clk, irq);
+ if (ret)
+ return ret;
+
+ return sun5i_setup_clockevent(node, timer_base, clk, irq);
+}
+TIMER_OF_DECLARE(sun5i_a13, "allwinner,sun5i-a13-hstimer",
+ sun5i_timer_init);
+TIMER_OF_DECLARE(sun7i_a20, "allwinner,sun7i-a20-hstimer",
+ sun5i_timer_init);