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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/powerpc/platforms/85xx/mpc85xx_cds.c
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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/powerpc/platforms/85xx/mpc85xx_cds.c')
-rw-r--r--arch/powerpc/platforms/85xx/mpc85xx_cds.c397
1 files changed, 397 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/85xx/mpc85xx_cds.c b/arch/powerpc/platforms/85xx/mpc85xx_cds.c
new file mode 100644
index 000000000..0b8f2101c
--- /dev/null
+++ b/arch/powerpc/platforms/85xx/mpc85xx_cds.c
@@ -0,0 +1,397 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * MPC85xx setup and early boot code plus other random bits.
+ *
+ * Maintained by Kumar Gala (see MAINTAINERS for contact information)
+ *
+ * Copyright 2005, 2011-2012 Freescale Semiconductor Inc.
+ */
+
+#include <linux/stddef.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/reboot.h>
+#include <linux/pci.h>
+#include <linux/kdev_t.h>
+#include <linux/major.h>
+#include <linux/console.h>
+#include <linux/delay.h>
+#include <linux/seq_file.h>
+#include <linux/initrd.h>
+#include <linux/interrupt.h>
+#include <linux/fsl_devices.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/pgtable.h>
+
+#include <asm/page.h>
+#include <linux/atomic.h>
+#include <asm/time.h>
+#include <asm/io.h>
+#include <asm/machdep.h>
+#include <asm/ipic.h>
+#include <asm/pci-bridge.h>
+#include <asm/irq.h>
+#include <mm/mmu_decl.h>
+#include <asm/udbg.h>
+#include <asm/mpic.h>
+#include <asm/i8259.h>
+
+#include <sysdev/fsl_soc.h>
+#include <sysdev/fsl_pci.h>
+
+#include "mpc85xx.h"
+
+/*
+ * The CDS board contains an FPGA/CPLD called "Cadmus", which collects
+ * various logic and performs system control functions.
+ * Here is the FPGA/CPLD register map.
+ */
+struct cadmus_reg {
+ u8 cm_ver; /* Board version */
+ u8 cm_csr; /* General control/status */
+ u8 cm_rst; /* Reset control */
+ u8 cm_hsclk; /* High speed clock */
+ u8 cm_hsxclk; /* High speed clock extended */
+ u8 cm_led; /* LED data */
+ u8 cm_pci; /* PCI control/status */
+ u8 cm_dma; /* DMA control */
+ u8 res[248]; /* Total 256 bytes */
+};
+
+static struct cadmus_reg *cadmus;
+
+#ifdef CONFIG_PCI
+
+#define ARCADIA_HOST_BRIDGE_IDSEL 17
+#define ARCADIA_2ND_BRIDGE_IDSEL 3
+
+static int mpc85xx_exclude_device(struct pci_controller *hose,
+ u_char bus, u_char devfn)
+{
+ /* We explicitly do not go past the Tundra 320 Bridge */
+ if ((bus == 1) && (PCI_SLOT(devfn) == ARCADIA_2ND_BRIDGE_IDSEL))
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ if ((bus == 0) && (PCI_SLOT(devfn) == ARCADIA_2ND_BRIDGE_IDSEL))
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ else
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int mpc85xx_cds_restart(struct notifier_block *this,
+ unsigned long mode, void *cmd)
+{
+ struct pci_dev *dev;
+ u_char tmp;
+
+ if ((dev = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686,
+ NULL))) {
+
+ /* Use the VIA Super Southbridge to force a PCI reset */
+ pci_read_config_byte(dev, 0x47, &tmp);
+ pci_write_config_byte(dev, 0x47, tmp | 1);
+
+ /* Flush the outbound PCI write queues */
+ pci_read_config_byte(dev, 0x47, &tmp);
+
+ /*
+ * At this point, the hardware reset should have triggered.
+ * However, if it doesn't work for some mysterious reason,
+ * just fall through to the default reset below.
+ */
+
+ pci_dev_put(dev);
+ }
+
+ /*
+ * If we can't find the VIA chip (maybe the P2P bridge is
+ * disabled) or the VIA chip reset didn't work, just return
+ * and let default reset sequence happen.
+ */
+ return NOTIFY_DONE;
+}
+
+static int mpc85xx_cds_restart_register(void)
+{
+ static struct notifier_block restart_handler;
+
+ restart_handler.notifier_call = mpc85xx_cds_restart;
+ restart_handler.priority = 192;
+
+ return register_restart_handler(&restart_handler);
+}
+machine_arch_initcall(mpc85xx_cds, mpc85xx_cds_restart_register);
+
+
+static void __init mpc85xx_cds_pci_irq_fixup(struct pci_dev *dev)
+{
+ u_char c;
+ if (dev->vendor == PCI_VENDOR_ID_VIA) {
+ switch (dev->device) {
+ case PCI_DEVICE_ID_VIA_82C586_1:
+ /*
+ * U-Boot does not set the enable bits
+ * for the IDE device. Force them on here.
+ */
+ pci_read_config_byte(dev, 0x40, &c);
+ c |= 0x03; /* IDE: Chip Enable Bits */
+ pci_write_config_byte(dev, 0x40, c);
+
+ /*
+ * Since only primary interface works, force the
+ * IDE function to standard primary IDE interrupt
+ * w/ 8259 offset
+ */
+ dev->irq = 14;
+ pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
+ break;
+ /*
+ * Force legacy USB interrupt routing
+ */
+ case PCI_DEVICE_ID_VIA_82C586_2:
+ /* There are two USB controllers.
+ * Identify them by function number
+ */
+ if (PCI_FUNC(dev->devfn) == 3)
+ dev->irq = 11;
+ else
+ dev->irq = 10;
+ pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
+ break;
+ default:
+ break;
+ }
+ }
+}
+
+static void skip_fake_bridge(struct pci_dev *dev)
+{
+ /* Make it an error to skip the fake bridge
+ * in pci_setup_device() in probe.c */
+ dev->hdr_type = 0x7f;
+}
+DECLARE_PCI_FIXUP_EARLY(0x1957, 0x3fff, skip_fake_bridge);
+DECLARE_PCI_FIXUP_EARLY(0x3fff, 0x1957, skip_fake_bridge);
+DECLARE_PCI_FIXUP_EARLY(0xff3f, 0x5719, skip_fake_bridge);
+
+#define PCI_DEVICE_ID_IDT_TSI310 0x01a7
+
+/*
+ * Fix Tsi310 PCI-X bridge resource.
+ * Force the bridge to open a window from 0x0000-0x1fff in PCI I/O space.
+ * This allows legacy I/O(i8259, etc) on the VIA southbridge to be accessed.
+ */
+void mpc85xx_cds_fixup_bus(struct pci_bus *bus)
+{
+ struct pci_dev *dev = bus->self;
+ struct resource *res = bus->resource[0];
+
+ if (dev != NULL &&
+ dev->vendor == PCI_VENDOR_ID_IBM &&
+ dev->device == PCI_DEVICE_ID_IDT_TSI310) {
+ if (res) {
+ res->start = 0;
+ res->end = 0x1fff;
+ res->flags = IORESOURCE_IO;
+ pr_info("mpc85xx_cds: PCI bridge resource fixup applied\n");
+ pr_info("mpc85xx_cds: %pR\n", res);
+ }
+ }
+
+ fsl_pcibios_fixup_bus(bus);
+}
+
+#ifdef CONFIG_PPC_I8259
+static void mpc85xx_8259_cascade_handler(struct irq_desc *desc)
+{
+ unsigned int cascade_irq = i8259_irq();
+
+ if (cascade_irq)
+ /* handle an interrupt from the 8259 */
+ generic_handle_irq(cascade_irq);
+
+ /* check for any interrupts from the shared IRQ line */
+ handle_fasteoi_irq(desc);
+}
+
+static irqreturn_t mpc85xx_8259_cascade_action(int irq, void *dev_id)
+{
+ return IRQ_HANDLED;
+}
+#endif /* PPC_I8259 */
+#endif /* CONFIG_PCI */
+
+static void __init mpc85xx_cds_pic_init(void)
+{
+ struct mpic *mpic;
+ mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
+ 0, 256, " OpenPIC ");
+ BUG_ON(mpic == NULL);
+ mpic_init(mpic);
+}
+
+#if defined(CONFIG_PPC_I8259) && defined(CONFIG_PCI)
+static int mpc85xx_cds_8259_attach(void)
+{
+ int ret;
+ struct device_node *np = NULL;
+ struct device_node *cascade_node = NULL;
+ int cascade_irq;
+
+ /* Initialize the i8259 controller */
+ for_each_node_by_type(np, "interrupt-controller")
+ if (of_device_is_compatible(np, "chrp,iic")) {
+ cascade_node = np;
+ break;
+ }
+
+ if (cascade_node == NULL) {
+ printk(KERN_DEBUG "Could not find i8259 PIC\n");
+ return -ENODEV;
+ }
+
+ cascade_irq = irq_of_parse_and_map(cascade_node, 0);
+ if (!cascade_irq) {
+ printk(KERN_ERR "Failed to map cascade interrupt\n");
+ return -ENXIO;
+ }
+
+ i8259_init(cascade_node, 0);
+ of_node_put(cascade_node);
+
+ /*
+ * Hook the interrupt to make sure desc->action is never NULL.
+ * This is required to ensure that the interrupt does not get
+ * disabled when the last user of the shared IRQ line frees their
+ * interrupt.
+ */
+ ret = request_irq(cascade_irq, mpc85xx_8259_cascade_action,
+ IRQF_SHARED | IRQF_NO_THREAD, "8259 cascade",
+ cascade_node);
+ if (ret) {
+ printk(KERN_ERR "Failed to setup cascade interrupt\n");
+ return ret;
+ }
+
+ /* Success. Connect our low-level cascade handler. */
+ irq_set_handler(cascade_irq, mpc85xx_8259_cascade_handler);
+
+ return 0;
+}
+machine_device_initcall(mpc85xx_cds, mpc85xx_cds_8259_attach);
+
+#endif /* CONFIG_PPC_I8259 */
+
+static void __init mpc85xx_cds_pci_assign_primary(void)
+{
+#ifdef CONFIG_PCI
+ struct device_node *np;
+
+ if (fsl_pci_primary)
+ return;
+
+ /*
+ * MPC85xx_CDS has ISA bridge but unfortunately there is no
+ * isa node in device tree. We now looking for i8259 node as
+ * a workaround for such a broken device tree. This routine
+ * is for complying to all device trees.
+ */
+ np = of_find_node_by_name(NULL, "i8259");
+ while ((fsl_pci_primary = of_get_parent(np))) {
+ of_node_put(np);
+ np = fsl_pci_primary;
+
+ if ((of_device_is_compatible(np, "fsl,mpc8540-pci") ||
+ of_device_is_compatible(np, "fsl,mpc8548-pcie")) &&
+ of_device_is_available(np))
+ return;
+ }
+#endif
+}
+
+/*
+ * Setup the architecture
+ */
+static void __init mpc85xx_cds_setup_arch(void)
+{
+ struct device_node *np;
+ int cds_pci_slot;
+
+ if (ppc_md.progress)
+ ppc_md.progress("mpc85xx_cds_setup_arch()", 0);
+
+ np = of_find_compatible_node(NULL, NULL, "fsl,mpc8548cds-fpga");
+ if (!np) {
+ pr_err("Could not find FPGA node.\n");
+ return;
+ }
+
+ cadmus = of_iomap(np, 0);
+ of_node_put(np);
+ if (!cadmus) {
+ pr_err("Fail to map FPGA area.\n");
+ return;
+ }
+
+ if (ppc_md.progress) {
+ char buf[40];
+ cds_pci_slot = ((in_8(&cadmus->cm_csr) >> 6) & 0x3) + 1;
+ snprintf(buf, 40, "CDS Version = 0x%x in slot %d\n",
+ in_8(&cadmus->cm_ver), cds_pci_slot);
+ ppc_md.progress(buf, 0);
+ }
+
+#ifdef CONFIG_PCI
+ ppc_md.pci_irq_fixup = mpc85xx_cds_pci_irq_fixup;
+ ppc_md.pci_exclude_device = mpc85xx_exclude_device;
+#endif
+
+ mpc85xx_cds_pci_assign_primary();
+ fsl_pci_assign_primary();
+}
+
+static void mpc85xx_cds_show_cpuinfo(struct seq_file *m)
+{
+ uint pvid, svid, phid1;
+
+ pvid = mfspr(SPRN_PVR);
+ svid = mfspr(SPRN_SVR);
+
+ seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
+ seq_printf(m, "Machine\t\t: MPC85xx CDS (0x%x)\n",
+ in_8(&cadmus->cm_ver));
+ seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
+ seq_printf(m, "SVR\t\t: 0x%x\n", svid);
+
+ /* Display cpu Pll setting */
+ phid1 = mfspr(SPRN_HID1);
+ seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
+}
+
+
+/*
+ * Called very early, device-tree isn't unflattened
+ */
+static int __init mpc85xx_cds_probe(void)
+{
+ return of_machine_is_compatible("MPC85xxCDS");
+}
+
+machine_arch_initcall(mpc85xx_cds, mpc85xx_common_publish_devices);
+
+define_machine(mpc85xx_cds) {
+ .name = "MPC85xx CDS",
+ .probe = mpc85xx_cds_probe,
+ .setup_arch = mpc85xx_cds_setup_arch,
+ .init_IRQ = mpc85xx_cds_pic_init,
+ .show_cpuinfo = mpc85xx_cds_show_cpuinfo,
+ .get_irq = mpic_get_irq,
+#ifdef CONFIG_PCI
+ .pcibios_fixup_bus = mpc85xx_cds_fixup_bus,
+ .pcibios_fixup_phb = fsl_pcibios_fixup_phb,
+#endif
+ .calibrate_decr = generic_calibrate_decr,
+ .progress = udbg_progress,
+};