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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/clk/bcm/clk-iproc-armpll.c
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 'drivers/clk/bcm/clk-iproc-armpll.c')
-rw-r--r--drivers/clk/bcm/clk-iproc-armpll.c273
1 files changed, 273 insertions, 0 deletions
diff --git a/drivers/clk/bcm/clk-iproc-armpll.c b/drivers/clk/bcm/clk-iproc-armpll.c
new file mode 100644
index 000000000..9e86c0c10
--- /dev/null
+++ b/drivers/clk/bcm/clk-iproc-armpll.c
@@ -0,0 +1,273 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Copyright (C) 2014 Broadcom Corporation
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/clk-provider.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/clkdev.h>
+#include <linux/of_address.h>
+
+#include "clk-iproc.h"
+
+#define IPROC_CLK_MAX_FREQ_POLICY 0x3
+#define IPROC_CLK_POLICY_FREQ_OFFSET 0x008
+#define IPROC_CLK_POLICY_FREQ_POLICY_FREQ_SHIFT 8
+#define IPROC_CLK_POLICY_FREQ_POLICY_FREQ_MASK 0x7
+
+#define IPROC_CLK_PLLARMA_OFFSET 0xc00
+#define IPROC_CLK_PLLARMA_LOCK_SHIFT 28
+#define IPROC_CLK_PLLARMA_PDIV_SHIFT 24
+#define IPROC_CLK_PLLARMA_PDIV_MASK 0xf
+#define IPROC_CLK_PLLARMA_NDIV_INT_SHIFT 8
+#define IPROC_CLK_PLLARMA_NDIV_INT_MASK 0x3ff
+
+#define IPROC_CLK_PLLARMB_OFFSET 0xc04
+#define IPROC_CLK_PLLARMB_NDIV_FRAC_MASK 0xfffff
+
+#define IPROC_CLK_PLLARMC_OFFSET 0xc08
+#define IPROC_CLK_PLLARMC_BYPCLK_EN_SHIFT 8
+#define IPROC_CLK_PLLARMC_MDIV_MASK 0xff
+
+#define IPROC_CLK_PLLARMCTL5_OFFSET 0xc20
+#define IPROC_CLK_PLLARMCTL5_H_MDIV_MASK 0xff
+
+#define IPROC_CLK_PLLARM_OFFSET_OFFSET 0xc24
+#define IPROC_CLK_PLLARM_SW_CTL_SHIFT 29
+#define IPROC_CLK_PLLARM_NDIV_INT_OFFSET_SHIFT 20
+#define IPROC_CLK_PLLARM_NDIV_INT_OFFSET_MASK 0xff
+#define IPROC_CLK_PLLARM_NDIV_FRAC_OFFSET_MASK 0xfffff
+
+#define IPROC_CLK_ARM_DIV_OFFSET 0xe00
+#define IPROC_CLK_ARM_DIV_PLL_SELECT_OVERRIDE_SHIFT 4
+#define IPROC_CLK_ARM_DIV_ARM_PLL_SELECT_MASK 0xf
+
+#define IPROC_CLK_POLICY_DBG_OFFSET 0xec0
+#define IPROC_CLK_POLICY_DBG_ACT_FREQ_SHIFT 12
+#define IPROC_CLK_POLICY_DBG_ACT_FREQ_MASK 0x7
+
+enum iproc_arm_pll_fid {
+ ARM_PLL_FID_CRYSTAL_CLK = 0,
+ ARM_PLL_FID_SYS_CLK = 2,
+ ARM_PLL_FID_CH0_SLOW_CLK = 6,
+ ARM_PLL_FID_CH1_FAST_CLK = 7
+};
+
+struct iproc_arm_pll {
+ struct clk_hw hw;
+ void __iomem *base;
+ unsigned long rate;
+};
+
+#define to_iproc_arm_pll(hw) container_of(hw, struct iproc_arm_pll, hw)
+
+static unsigned int __get_fid(struct iproc_arm_pll *pll)
+{
+ u32 val;
+ unsigned int policy, fid, active_fid;
+
+ val = readl(pll->base + IPROC_CLK_ARM_DIV_OFFSET);
+ if (val & (1 << IPROC_CLK_ARM_DIV_PLL_SELECT_OVERRIDE_SHIFT))
+ policy = val & IPROC_CLK_ARM_DIV_ARM_PLL_SELECT_MASK;
+ else
+ policy = 0;
+
+ /* something is seriously wrong */
+ BUG_ON(policy > IPROC_CLK_MAX_FREQ_POLICY);
+
+ val = readl(pll->base + IPROC_CLK_POLICY_FREQ_OFFSET);
+ fid = (val >> (IPROC_CLK_POLICY_FREQ_POLICY_FREQ_SHIFT * policy)) &
+ IPROC_CLK_POLICY_FREQ_POLICY_FREQ_MASK;
+
+ val = readl(pll->base + IPROC_CLK_POLICY_DBG_OFFSET);
+ active_fid = IPROC_CLK_POLICY_DBG_ACT_FREQ_MASK &
+ (val >> IPROC_CLK_POLICY_DBG_ACT_FREQ_SHIFT);
+ if (fid != active_fid) {
+ pr_debug("%s: fid override %u->%u\n", __func__, fid,
+ active_fid);
+ fid = active_fid;
+ }
+
+ pr_debug("%s: active fid: %u\n", __func__, fid);
+
+ return fid;
+}
+
+/*
+ * Determine the mdiv (post divider) based on the frequency ID being used.
+ * There are 4 sources that can be used to derive the output clock rate:
+ * - 25 MHz Crystal
+ * - System clock
+ * - PLL channel 0 (slow clock)
+ * - PLL channel 1 (fast clock)
+ */
+static int __get_mdiv(struct iproc_arm_pll *pll)
+{
+ unsigned int fid;
+ int mdiv;
+ u32 val;
+
+ fid = __get_fid(pll);
+
+ switch (fid) {
+ case ARM_PLL_FID_CRYSTAL_CLK:
+ case ARM_PLL_FID_SYS_CLK:
+ mdiv = 1;
+ break;
+
+ case ARM_PLL_FID_CH0_SLOW_CLK:
+ val = readl(pll->base + IPROC_CLK_PLLARMC_OFFSET);
+ mdiv = val & IPROC_CLK_PLLARMC_MDIV_MASK;
+ if (mdiv == 0)
+ mdiv = 256;
+ break;
+
+ case ARM_PLL_FID_CH1_FAST_CLK:
+ val = readl(pll->base + IPROC_CLK_PLLARMCTL5_OFFSET);
+ mdiv = val & IPROC_CLK_PLLARMCTL5_H_MDIV_MASK;
+ if (mdiv == 0)
+ mdiv = 256;
+ break;
+
+ default:
+ mdiv = -EFAULT;
+ }
+
+ return mdiv;
+}
+
+static unsigned int __get_ndiv(struct iproc_arm_pll *pll)
+{
+ u32 val;
+ unsigned int ndiv_int, ndiv_frac, ndiv;
+
+ val = readl(pll->base + IPROC_CLK_PLLARM_OFFSET_OFFSET);
+ if (val & (1 << IPROC_CLK_PLLARM_SW_CTL_SHIFT)) {
+ /*
+ * offset mode is active. Read the ndiv from the PLLARM OFFSET
+ * register
+ */
+ ndiv_int = (val >> IPROC_CLK_PLLARM_NDIV_INT_OFFSET_SHIFT) &
+ IPROC_CLK_PLLARM_NDIV_INT_OFFSET_MASK;
+ if (ndiv_int == 0)
+ ndiv_int = 256;
+
+ ndiv_frac = val & IPROC_CLK_PLLARM_NDIV_FRAC_OFFSET_MASK;
+ } else {
+ /* offset mode not active */
+ val = readl(pll->base + IPROC_CLK_PLLARMA_OFFSET);
+ ndiv_int = (val >> IPROC_CLK_PLLARMA_NDIV_INT_SHIFT) &
+ IPROC_CLK_PLLARMA_NDIV_INT_MASK;
+ if (ndiv_int == 0)
+ ndiv_int = 1024;
+
+ val = readl(pll->base + IPROC_CLK_PLLARMB_OFFSET);
+ ndiv_frac = val & IPROC_CLK_PLLARMB_NDIV_FRAC_MASK;
+ }
+
+ ndiv = (ndiv_int << 20) | ndiv_frac;
+
+ return ndiv;
+}
+
+/*
+ * The output frequency of the ARM PLL is calculated based on the ARM PLL
+ * divider values:
+ * pdiv = ARM PLL pre-divider
+ * ndiv = ARM PLL multiplier
+ * mdiv = ARM PLL post divider
+ *
+ * The frequency is calculated by:
+ * ((ndiv * parent clock rate) / pdiv) / mdiv
+ */
+static unsigned long iproc_arm_pll_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct iproc_arm_pll *pll = to_iproc_arm_pll(hw);
+ u32 val;
+ int mdiv;
+ u64 ndiv;
+ unsigned int pdiv;
+
+ /* in bypass mode, use parent rate */
+ val = readl(pll->base + IPROC_CLK_PLLARMC_OFFSET);
+ if (val & (1 << IPROC_CLK_PLLARMC_BYPCLK_EN_SHIFT)) {
+ pll->rate = parent_rate;
+ return pll->rate;
+ }
+
+ /* PLL needs to be locked */
+ val = readl(pll->base + IPROC_CLK_PLLARMA_OFFSET);
+ if (!(val & (1 << IPROC_CLK_PLLARMA_LOCK_SHIFT))) {
+ pll->rate = 0;
+ return 0;
+ }
+
+ pdiv = (val >> IPROC_CLK_PLLARMA_PDIV_SHIFT) &
+ IPROC_CLK_PLLARMA_PDIV_MASK;
+ if (pdiv == 0)
+ pdiv = 16;
+
+ ndiv = __get_ndiv(pll);
+ mdiv = __get_mdiv(pll);
+ if (mdiv <= 0) {
+ pll->rate = 0;
+ return 0;
+ }
+ pll->rate = (ndiv * parent_rate) >> 20;
+ pll->rate = (pll->rate / pdiv) / mdiv;
+
+ pr_debug("%s: ARM PLL rate: %lu. parent rate: %lu\n", __func__,
+ pll->rate, parent_rate);
+ pr_debug("%s: ndiv_int: %u, pdiv: %u, mdiv: %d\n", __func__,
+ (unsigned int)(ndiv >> 20), pdiv, mdiv);
+
+ return pll->rate;
+}
+
+static const struct clk_ops iproc_arm_pll_ops = {
+ .recalc_rate = iproc_arm_pll_recalc_rate,
+};
+
+void __init iproc_armpll_setup(struct device_node *node)
+{
+ int ret;
+ struct iproc_arm_pll *pll;
+ struct clk_init_data init;
+ const char *parent_name;
+
+ pll = kzalloc(sizeof(*pll), GFP_KERNEL);
+ if (WARN_ON(!pll))
+ return;
+
+ pll->base = of_iomap(node, 0);
+ if (WARN_ON(!pll->base))
+ goto err_free_pll;
+
+ init.name = node->name;
+ init.ops = &iproc_arm_pll_ops;
+ init.flags = 0;
+ parent_name = of_clk_get_parent_name(node, 0);
+ init.parent_names = (parent_name ? &parent_name : NULL);
+ init.num_parents = (parent_name ? 1 : 0);
+ pll->hw.init = &init;
+
+ ret = clk_hw_register(NULL, &pll->hw);
+ if (WARN_ON(ret))
+ goto err_iounmap;
+
+ ret = of_clk_add_hw_provider(node, of_clk_hw_simple_get, &pll->hw);
+ if (WARN_ON(ret))
+ goto err_clk_unregister;
+
+ return;
+
+err_clk_unregister:
+ clk_hw_unregister(&pll->hw);
+err_iounmap:
+ iounmap(pll->base);
+err_free_pll:
+ kfree(pll);
+}