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author | 2023-02-21 18:24:12 -0800 | |
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committer | 2023-02-21 18:24:12 -0800 | |
commit | 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch) | |
tree | cc5c2d0a898769fd59549594fedb3ee6f84e59a0 /drivers/clk/tegra/clk.c | |
download | linux-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/clk/tegra/clk.c')
-rw-r--r-- | drivers/clk/tegra/clk.c | 455 |
1 files changed, 455 insertions, 0 deletions
diff --git a/drivers/clk/tegra/clk.c b/drivers/clk/tegra/clk.c new file mode 100644 index 000000000..26bda4581 --- /dev/null +++ b/drivers/clk/tegra/clk.c @@ -0,0 +1,455 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. + */ + +#include <linux/clkdev.h> +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/delay.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/clk/tegra.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/reset-controller.h> +#include <linux/string.h> + +#include <soc/tegra/fuse.h> + +#include "clk.h" + +/* Global data of Tegra CPU CAR ops */ +static struct device_node *tegra_car_np; +static struct tegra_cpu_car_ops dummy_car_ops; +struct tegra_cpu_car_ops *tegra_cpu_car_ops = &dummy_car_ops; + +int *periph_clk_enb_refcnt; +static int periph_banks; +static u32 *periph_state_ctx; +static struct clk **clks; +static int clk_num; +static struct clk_onecell_data clk_data; + +/* Handlers for SoC-specific reset lines */ +static int (*special_reset_assert)(unsigned long); +static int (*special_reset_deassert)(unsigned long); +static unsigned int num_special_reset; + +static const struct tegra_clk_periph_regs periph_regs[] = { + [0] = { + .enb_reg = CLK_OUT_ENB_L, + .enb_set_reg = CLK_OUT_ENB_SET_L, + .enb_clr_reg = CLK_OUT_ENB_CLR_L, + .rst_reg = RST_DEVICES_L, + .rst_set_reg = RST_DEVICES_SET_L, + .rst_clr_reg = RST_DEVICES_CLR_L, + }, + [1] = { + .enb_reg = CLK_OUT_ENB_H, + .enb_set_reg = CLK_OUT_ENB_SET_H, + .enb_clr_reg = CLK_OUT_ENB_CLR_H, + .rst_reg = RST_DEVICES_H, + .rst_set_reg = RST_DEVICES_SET_H, + .rst_clr_reg = RST_DEVICES_CLR_H, + }, + [2] = { + .enb_reg = CLK_OUT_ENB_U, + .enb_set_reg = CLK_OUT_ENB_SET_U, + .enb_clr_reg = CLK_OUT_ENB_CLR_U, + .rst_reg = RST_DEVICES_U, + .rst_set_reg = RST_DEVICES_SET_U, + .rst_clr_reg = RST_DEVICES_CLR_U, + }, + [3] = { + .enb_reg = CLK_OUT_ENB_V, + .enb_set_reg = CLK_OUT_ENB_SET_V, + .enb_clr_reg = CLK_OUT_ENB_CLR_V, + .rst_reg = RST_DEVICES_V, + .rst_set_reg = RST_DEVICES_SET_V, + .rst_clr_reg = RST_DEVICES_CLR_V, + }, + [4] = { + .enb_reg = CLK_OUT_ENB_W, + .enb_set_reg = CLK_OUT_ENB_SET_W, + .enb_clr_reg = CLK_OUT_ENB_CLR_W, + .rst_reg = RST_DEVICES_W, + .rst_set_reg = RST_DEVICES_SET_W, + .rst_clr_reg = RST_DEVICES_CLR_W, + }, + [5] = { + .enb_reg = CLK_OUT_ENB_X, + .enb_set_reg = CLK_OUT_ENB_SET_X, + .enb_clr_reg = CLK_OUT_ENB_CLR_X, + .rst_reg = RST_DEVICES_X, + .rst_set_reg = RST_DEVICES_SET_X, + .rst_clr_reg = RST_DEVICES_CLR_X, + }, + [6] = { + .enb_reg = CLK_OUT_ENB_Y, + .enb_set_reg = CLK_OUT_ENB_SET_Y, + .enb_clr_reg = CLK_OUT_ENB_CLR_Y, + .rst_reg = RST_DEVICES_Y, + .rst_set_reg = RST_DEVICES_SET_Y, + .rst_clr_reg = RST_DEVICES_CLR_Y, + }, +}; + +static void __iomem *clk_base; + +static int tegra_clk_rst_assert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + /* + * If peripheral is on the APB bus then we must read the APB bus to + * flush the write operation in apb bus. This will avoid peripheral + * access after disabling clock. Since the reset driver has no + * knowledge of which reset IDs represent which devices, simply do + * this all the time. + */ + tegra_read_chipid(); + + if (id < periph_banks * 32) { + writel_relaxed(BIT(id % 32), + clk_base + periph_regs[id / 32].rst_set_reg); + return 0; + } else if (id < periph_banks * 32 + num_special_reset) { + return special_reset_assert(id); + } + + return -EINVAL; +} + +static int tegra_clk_rst_deassert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + if (id < periph_banks * 32) { + writel_relaxed(BIT(id % 32), + clk_base + periph_regs[id / 32].rst_clr_reg); + return 0; + } else if (id < periph_banks * 32 + num_special_reset) { + return special_reset_deassert(id); + } + + return -EINVAL; +} + +static int tegra_clk_rst_reset(struct reset_controller_dev *rcdev, + unsigned long id) +{ + int err; + + err = tegra_clk_rst_assert(rcdev, id); + if (err) + return err; + + udelay(1); + + return tegra_clk_rst_deassert(rcdev, id); +} + +const struct tegra_clk_periph_regs *get_reg_bank(int clkid) +{ + int reg_bank = clkid / 32; + + if (reg_bank < periph_banks) + return &periph_regs[reg_bank]; + else { + WARN_ON(1); + return NULL; + } +} + +void tegra_clk_set_pllp_out_cpu(bool enable) +{ + u32 val; + + val = readl_relaxed(clk_base + CLK_OUT_ENB_Y); + if (enable) + val |= CLK_ENB_PLLP_OUT_CPU; + else + val &= ~CLK_ENB_PLLP_OUT_CPU; + + writel_relaxed(val, clk_base + CLK_OUT_ENB_Y); +} + +void tegra_clk_periph_suspend(void) +{ + unsigned int i, idx; + + idx = 0; + for (i = 0; i < periph_banks; i++, idx++) + periph_state_ctx[idx] = + readl_relaxed(clk_base + periph_regs[i].enb_reg); + + for (i = 0; i < periph_banks; i++, idx++) + periph_state_ctx[idx] = + readl_relaxed(clk_base + periph_regs[i].rst_reg); +} + +void tegra_clk_periph_resume(void) +{ + unsigned int i, idx; + + idx = 0; + for (i = 0; i < periph_banks; i++, idx++) + writel_relaxed(periph_state_ctx[idx], + clk_base + periph_regs[i].enb_reg); + /* + * All non-boot peripherals will be in reset state on resume. + * Wait for 5us of reset propagation delay before de-asserting + * the peripherals based on the saved context. + */ + fence_udelay(5, clk_base); + + for (i = 0; i < periph_banks; i++, idx++) + writel_relaxed(periph_state_ctx[idx], + clk_base + periph_regs[i].rst_reg); + + fence_udelay(2, clk_base); +} + +static int tegra_clk_periph_ctx_init(int banks) +{ + periph_state_ctx = kcalloc(2 * banks, sizeof(*periph_state_ctx), + GFP_KERNEL); + if (!periph_state_ctx) + return -ENOMEM; + + return 0; +} + +struct clk ** __init tegra_clk_init(void __iomem *regs, int num, int banks) +{ + clk_base = regs; + + if (WARN_ON(banks > ARRAY_SIZE(periph_regs))) + return NULL; + + periph_clk_enb_refcnt = kcalloc(32 * banks, + sizeof(*periph_clk_enb_refcnt), + GFP_KERNEL); + if (!periph_clk_enb_refcnt) + return NULL; + + periph_banks = banks; + + clks = kcalloc(num, sizeof(struct clk *), GFP_KERNEL); + if (!clks) { + kfree(periph_clk_enb_refcnt); + return NULL; + } + + clk_num = num; + + if (IS_ENABLED(CONFIG_PM_SLEEP)) { + if (tegra_clk_periph_ctx_init(banks)) { + kfree(periph_clk_enb_refcnt); + kfree(clks); + return NULL; + } + } + + return clks; +} + +void __init tegra_init_dup_clks(struct tegra_clk_duplicate *dup_list, + struct clk *clks[], int clk_max) +{ + struct clk *clk; + + for (; dup_list->clk_id < clk_max; dup_list++) { + clk = clks[dup_list->clk_id]; + dup_list->lookup.clk = clk; + clkdev_add(&dup_list->lookup); + } +} + +void tegra_init_from_table(struct tegra_clk_init_table *tbl, + struct clk *clks[], int clk_max) +{ + struct clk *clk; + + for (; tbl->clk_id < clk_max; tbl++) { + clk = clks[tbl->clk_id]; + if (IS_ERR_OR_NULL(clk)) { + pr_err("%s: invalid entry %ld in clks array for id %d\n", + __func__, PTR_ERR(clk), tbl->clk_id); + WARN_ON(1); + + continue; + } + + if (tbl->parent_id < clk_max) { + struct clk *parent = clks[tbl->parent_id]; + if (clk_set_parent(clk, parent)) { + pr_err("%s: Failed to set parent %s of %s\n", + __func__, __clk_get_name(parent), + __clk_get_name(clk)); + WARN_ON(1); + } + } + + if (tbl->rate) + if (clk_set_rate(clk, tbl->rate)) { + pr_err("%s: Failed to set rate %lu of %s\n", + __func__, tbl->rate, + __clk_get_name(clk)); + WARN_ON(1); + } + + if (tbl->state) + if (clk_prepare_enable(clk)) { + pr_err("%s: Failed to enable %s\n", __func__, + __clk_get_name(clk)); + WARN_ON(1); + } + } +} + +static const struct reset_control_ops rst_ops = { + .assert = tegra_clk_rst_assert, + .deassert = tegra_clk_rst_deassert, + .reset = tegra_clk_rst_reset, +}; + +static struct reset_controller_dev rst_ctlr = { + .ops = &rst_ops, + .owner = THIS_MODULE, + .of_reset_n_cells = 1, +}; + +void __init tegra_add_of_provider(struct device_node *np, + void *clk_src_onecell_get) +{ + int i; + + tegra_car_np = np; + + for (i = 0; i < clk_num; i++) { + if (IS_ERR(clks[i])) { + pr_err + ("Tegra clk %d: register failed with %ld\n", + i, PTR_ERR(clks[i])); + } + if (!clks[i]) + clks[i] = ERR_PTR(-EINVAL); + } + + clk_data.clks = clks; + clk_data.clk_num = clk_num; + of_clk_add_provider(np, clk_src_onecell_get, &clk_data); + + rst_ctlr.of_node = np; + rst_ctlr.nr_resets = periph_banks * 32 + num_special_reset; + reset_controller_register(&rst_ctlr); +} + +void __init tegra_init_special_resets(unsigned int num, + int (*assert)(unsigned long), + int (*deassert)(unsigned long)) +{ + num_special_reset = num; + special_reset_assert = assert; + special_reset_deassert = deassert; +} + +void tegra_register_devclks(struct tegra_devclk *dev_clks, int num) +{ + int i; + + for (i = 0; i < num; i++, dev_clks++) + clk_register_clkdev(clks[dev_clks->dt_id], dev_clks->con_id, + dev_clks->dev_id); + + for (i = 0; i < clk_num; i++) { + if (!IS_ERR_OR_NULL(clks[i])) + clk_register_clkdev(clks[i], __clk_get_name(clks[i]), + "tegra-clk-debug"); + } +} + +struct clk ** __init tegra_lookup_dt_id(int clk_id, + struct tegra_clk *tegra_clk) +{ + if (tegra_clk[clk_id].present) + return &clks[tegra_clk[clk_id].dt_id]; + else + return NULL; +} + +static struct device_node *tegra_clk_get_of_node(struct clk_hw *hw) +{ + struct device_node *np; + char *node_name; + + node_name = kstrdup(hw->init->name, GFP_KERNEL); + if (!node_name) + return NULL; + + strreplace(node_name, '_', '-'); + + for_each_child_of_node(tegra_car_np, np) { + if (!strcmp(np->name, node_name)) + break; + } + + kfree(node_name); + + return np; +} + +struct clk *tegra_clk_dev_register(struct clk_hw *hw) +{ + struct platform_device *pdev, *parent; + const char *dev_name = NULL; + struct device *dev = NULL; + struct device_node *np; + + np = tegra_clk_get_of_node(hw); + + if (!of_device_is_available(np)) + goto put_node; + + dev_name = kasprintf(GFP_KERNEL, "tegra_clk_%s", hw->init->name); + if (!dev_name) + goto put_node; + + parent = of_find_device_by_node(tegra_car_np); + if (parent) { + pdev = of_platform_device_create(np, dev_name, &parent->dev); + put_device(&parent->dev); + + if (!pdev) { + pr_err("%s: failed to create device for %pOF\n", + __func__, np); + goto free_name; + } + + dev = &pdev->dev; + pm_runtime_enable(dev); + } else { + WARN(1, "failed to find device for %pOF\n", tegra_car_np); + } + +free_name: + kfree(dev_name); +put_node: + of_node_put(np); + + return clk_register(dev, hw); +} + +tegra_clk_apply_init_table_func tegra_clk_apply_init_table; + +static int __init tegra_clocks_apply_init_table(void) +{ + if (!tegra_clk_apply_init_table) + return 0; + + tegra_clk_apply_init_table(); + + return 0; +} +arch_initcall(tegra_clocks_apply_init_table); |