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().
  ...

1 files changed, 407 insertions, 0 deletions

diff --git a/arch/sh/drivers/pci/pci-sh7780.c b/arch/sh/drivers/pci/pci-sh7780.c
new file mode 100644
index 000000000..9a624a6ee
--- /dev/null
+++ b/arch/sh/drivers/pci/pci-sh7780.c
@@ -0,0 +1,407 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Low-Level PCI Support for the SH7780
+ *
+ *  Copyright (C) 2005 - 2010  Paul Mundt
+ */
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+#include <linux/timer.h>
+#include <linux/irq.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/log2.h>
+#include "pci-sh4.h"
+#include <asm/mmu.h>
+#include <linux/sizes.h>
+
+#if defined(CONFIG_CPU_BIG_ENDIAN)
+# define PCICR_ENDIANNESS SH4_PCICR_BSWP
+#else
+# define PCICR_ENDIANNESS 0
+#endif
+
+
+static struct resource sh7785_pci_resources[] = {
+	{
+		.name	= "PCI IO",
+		.start	= 0x1000,
+		.end	= SZ_4M - 1,
+		.flags	= IORESOURCE_IO,
+	}, {
+		.name	= "PCI MEM 0",
+		.start	= 0xfd000000,
+		.end	= 0xfd000000 + SZ_16M - 1,
+		.flags	= IORESOURCE_MEM,
+	}, {
+		.name	= "PCI MEM 1",
+		.start	= 0x10000000,
+		.end	= 0x10000000 + SZ_64M - 1,
+		.flags	= IORESOURCE_MEM,
+	}, {
+		/*
+		 * 32-bit only resources must be last.
+		 */
+		.name	= "PCI MEM 2",
+		.start	= 0xc0000000,
+		.end	= 0xc0000000 + SZ_512M - 1,
+		.flags	= IORESOURCE_MEM | IORESOURCE_MEM_32BIT,
+	},
+};
+
+static struct pci_channel sh7780_pci_controller = {
+	.pci_ops	= &sh4_pci_ops,
+	.resources	= sh7785_pci_resources,
+	.nr_resources	= ARRAY_SIZE(sh7785_pci_resources),
+	.io_offset	= 0,
+	.mem_offset	= 0,
+	.io_map_base	= 0xfe200000,
+	.serr_irq	= evt2irq(0xa00),
+	.err_irq	= evt2irq(0xaa0),
+};
+
+struct pci_errors {
+	unsigned int	mask;
+	const char	*str;
+} pci_arbiter_errors[] = {
+	{ SH4_PCIAINT_MBKN,	"master broken" },
+	{ SH4_PCIAINT_TBTO,	"target bus time out" },
+	{ SH4_PCIAINT_MBTO,	"master bus time out" },
+	{ SH4_PCIAINT_TABT,	"target abort" },
+	{ SH4_PCIAINT_MABT,	"master abort" },
+	{ SH4_PCIAINT_RDPE,	"read data parity error" },
+	{ SH4_PCIAINT_WDPE,	"write data parity error" },
+}, pci_interrupt_errors[] = {
+	{ SH4_PCIINT_MLCK,	"master lock error" },
+	{ SH4_PCIINT_TABT,	"target-target abort" },
+	{ SH4_PCIINT_TRET,	"target retry time out" },
+	{ SH4_PCIINT_MFDE,	"master function disable error" },
+	{ SH4_PCIINT_PRTY,	"address parity error" },
+	{ SH4_PCIINT_SERR,	"SERR" },
+	{ SH4_PCIINT_TWDP,	"data parity error for target write" },
+	{ SH4_PCIINT_TRDP,	"PERR detected for target read" },
+	{ SH4_PCIINT_MTABT,	"target abort for master" },
+	{ SH4_PCIINT_MMABT,	"master abort for master" },
+	{ SH4_PCIINT_MWPD,	"master write data parity error" },
+	{ SH4_PCIINT_MRPD,	"master read data parity error" },
+};
+
+static irqreturn_t sh7780_pci_err_irq(int irq, void *dev_id)
+{
+	struct pci_channel *hose = dev_id;
+	unsigned long addr;
+	unsigned int status;
+	unsigned int cmd;
+	int i;
+
+	addr = __raw_readl(hose->reg_base + SH4_PCIALR);
+
+	/*
+	 * Handle status errors.
+	 */
+	status = __raw_readw(hose->reg_base + PCI_STATUS);
+	if (status & (PCI_STATUS_PARITY |
+		      PCI_STATUS_DETECTED_PARITY |
+		      PCI_STATUS_SIG_TARGET_ABORT |
+		      PCI_STATUS_REC_TARGET_ABORT |
+		      PCI_STATUS_REC_MASTER_ABORT)) {
+		cmd = pcibios_handle_status_errors(addr, status, hose);
+		if (likely(cmd))
+			__raw_writew(cmd, hose->reg_base + PCI_STATUS);
+	}
+
+	/*
+	 * Handle arbiter errors.
+	 */
+	status = __raw_readl(hose->reg_base + SH4_PCIAINT);
+	for (i = cmd = 0; i < ARRAY_SIZE(pci_arbiter_errors); i++) {
+		if (status & pci_arbiter_errors[i].mask) {
+			printk(KERN_DEBUG "PCI: %s, addr=%08lx\n",
+			       pci_arbiter_errors[i].str, addr);
+			cmd |= pci_arbiter_errors[i].mask;
+		}
+	}
+	__raw_writel(cmd, hose->reg_base + SH4_PCIAINT);
+
+	/*
+	 * Handle the remaining PCI errors.
+	 */
+	status = __raw_readl(hose->reg_base + SH4_PCIINT);
+	for (i = cmd = 0; i < ARRAY_SIZE(pci_interrupt_errors); i++) {
+		if (status & pci_interrupt_errors[i].mask) {
+			printk(KERN_DEBUG "PCI: %s, addr=%08lx\n",
+			       pci_interrupt_errors[i].str, addr);
+			cmd |= pci_interrupt_errors[i].mask;
+		}
+	}
+	__raw_writel(cmd, hose->reg_base + SH4_PCIINT);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t sh7780_pci_serr_irq(int irq, void *dev_id)
+{
+	struct pci_channel *hose = dev_id;
+
+	printk(KERN_DEBUG "PCI: system error received: ");
+	pcibios_report_status(PCI_STATUS_SIG_SYSTEM_ERROR, 1);
+	pr_cont("\n");
+
+	/* Deassert SERR */
+	__raw_writel(SH4_PCIINTM_SDIM, hose->reg_base + SH4_PCIINTM);
+
+	/* Back off the IRQ for awhile */
+	disable_irq_nosync(irq);
+	hose->serr_timer.expires = jiffies + HZ;
+	add_timer(&hose->serr_timer);
+
+	return IRQ_HANDLED;
+}
+
+static int __init sh7780_pci_setup_irqs(struct pci_channel *hose)
+{
+	int ret;
+
+	/* Clear out PCI arbiter IRQs */
+	__raw_writel(0, hose->reg_base + SH4_PCIAINT);
+
+	/* Clear all error conditions */
+	__raw_writew(PCI_STATUS_DETECTED_PARITY  | \
+		     PCI_STATUS_SIG_SYSTEM_ERROR | \
+		     PCI_STATUS_REC_MASTER_ABORT | \
+		     PCI_STATUS_REC_TARGET_ABORT | \
+		     PCI_STATUS_SIG_TARGET_ABORT | \
+		     PCI_STATUS_PARITY, hose->reg_base + PCI_STATUS);
+
+	ret = request_irq(hose->serr_irq, sh7780_pci_serr_irq, 0,
+			  "PCI SERR interrupt", hose);
+	if (unlikely(ret)) {
+		pr_err("PCI: Failed hooking SERR IRQ\n");
+		return ret;
+	}
+
+	/*
+	 * The PCI ERR IRQ needs to be IRQF_SHARED since all of the power
+	 * down IRQ vectors are routed through the ERR IRQ vector. We
+	 * only request_irq() once as there is only a single masking
+	 * source for multiple events.
+	 */
+	ret = request_irq(hose->err_irq, sh7780_pci_err_irq, IRQF_SHARED,
+			  "PCI ERR interrupt", hose);
+	if (unlikely(ret)) {
+		free_irq(hose->serr_irq, hose);
+		return ret;
+	}
+
+	/* Unmask all of the arbiter IRQs. */
+	__raw_writel(SH4_PCIAINT_MBKN | SH4_PCIAINT_TBTO | SH4_PCIAINT_MBTO | \
+		     SH4_PCIAINT_TABT | SH4_PCIAINT_MABT | SH4_PCIAINT_RDPE | \
+		     SH4_PCIAINT_WDPE, hose->reg_base + SH4_PCIAINTM);
+
+	/* Unmask all of the PCI IRQs */
+	__raw_writel(SH4_PCIINTM_TTADIM  | SH4_PCIINTM_TMTOIM  | \
+		     SH4_PCIINTM_MDEIM   | SH4_PCIINTM_APEDIM  | \
+		     SH4_PCIINTM_SDIM    | SH4_PCIINTM_DPEITWM | \
+		     SH4_PCIINTM_PEDITRM | SH4_PCIINTM_TADIMM  | \
+		     SH4_PCIINTM_MADIMM  | SH4_PCIINTM_MWPDIM  | \
+		     SH4_PCIINTM_MRDPEIM, hose->reg_base + SH4_PCIINTM);
+
+	return ret;
+}
+
+static inline void __init sh7780_pci_teardown_irqs(struct pci_channel *hose)
+{
+	free_irq(hose->err_irq, hose);
+	free_irq(hose->serr_irq, hose);
+}
+
+static void __init sh7780_pci66_init(struct pci_channel *hose)
+{
+	unsigned int tmp;
+
+	if (!pci_is_66mhz_capable(hose, 0, 0))
+		return;
+
+	/* Enable register access */
+	tmp = __raw_readl(hose->reg_base + SH4_PCICR);
+	tmp |= SH4_PCICR_PREFIX;
+	__raw_writel(tmp, hose->reg_base + SH4_PCICR);
+
+	/* Enable 66MHz operation */
+	tmp = __raw_readw(hose->reg_base + PCI_STATUS);
+	tmp |= PCI_STATUS_66MHZ;
+	__raw_writew(tmp, hose->reg_base + PCI_STATUS);
+
+	/* Done */
+	tmp = __raw_readl(hose->reg_base + SH4_PCICR);
+	tmp |= SH4_PCICR_PREFIX | SH4_PCICR_CFIN;
+	__raw_writel(tmp, hose->reg_base + SH4_PCICR);
+}
+
+static int __init sh7780_pci_init(void)
+{
+	struct pci_channel *chan = &sh7780_pci_controller;
+	phys_addr_t memphys;
+	size_t memsize;
+	unsigned int id;
+	const char *type;
+	int ret, i;
+
+	pr_notice("PCI: Starting initialization.\n");
+
+	chan->reg_base = 0xfe040000;
+
+	/* Enable CPU access to the PCIC registers. */
+	__raw_writel(PCIECR_ENBL, PCIECR);
+
+	/* Reset */
+	__raw_writel(SH4_PCICR_PREFIX | SH4_PCICR_PRST | PCICR_ENDIANNESS,
+		     chan->reg_base + SH4_PCICR);
+
+	/*
+	 * Wait for it to come back up. The spec says to allow for up to
+	 * 1 second after toggling the reset pin, but in practice 100ms
+	 * is more than enough.
+	 */
+	mdelay(100);
+
+	id = __raw_readw(chan->reg_base + PCI_VENDOR_ID);
+	if (id != PCI_VENDOR_ID_RENESAS) {
+		pr_err("PCI: Unknown vendor ID 0x%04x.\n", id);
+		return -ENODEV;
+	}
+
+	id = __raw_readw(chan->reg_base + PCI_DEVICE_ID);
+	type = (id == PCI_DEVICE_ID_RENESAS_SH7763) ? "SH7763" :
+	       (id == PCI_DEVICE_ID_RENESAS_SH7780) ? "SH7780" :
+	       (id == PCI_DEVICE_ID_RENESAS_SH7781) ? "SH7781" :
+	       (id == PCI_DEVICE_ID_RENESAS_SH7785) ? "SH7785" :
+					  NULL;
+	if (unlikely(!type)) {
+		pr_err("PCI: Found an unsupported Renesas host controller, device id 0x%04x.\n",
+		       id);
+		return -EINVAL;
+	}
+
+	pr_notice("PCI: Found a Renesas %s host controller, revision %d.\n",
+		  type, __raw_readb(chan->reg_base + PCI_REVISION_ID));
+
+	/*
+	 * Now throw it in to register initialization mode and
+	 * start the real work.
+	 */
+	__raw_writel(SH4_PCICR_PREFIX | PCICR_ENDIANNESS,
+		     chan->reg_base + SH4_PCICR);
+
+	memphys = __pa(memory_start);
+	memsize = roundup_pow_of_two(memory_end - memory_start);
+
+	/*
+	 * If there's more than 512MB of memory, we need to roll over to
+	 * LAR1/LSR1.
+	 */
+	if (memsize > SZ_512M) {
+		__raw_writel(memphys + SZ_512M, chan->reg_base + SH4_PCILAR1);
+		__raw_writel((((memsize - SZ_512M) - SZ_1M) & 0x1ff00000) | 1,
+			     chan->reg_base + SH4_PCILSR1);
+		memsize = SZ_512M;
+	} else {
+		/*
+		 * Otherwise just zero it out and disable it.
+		 */
+		__raw_writel(0, chan->reg_base + SH4_PCILAR1);
+		__raw_writel(0, chan->reg_base + SH4_PCILSR1);
+	}
+
+	/*
+	 * LAR0/LSR0 covers up to the first 512MB, which is enough to
+	 * cover all of lowmem on most platforms.
+	 */
+	__raw_writel(memphys, chan->reg_base + SH4_PCILAR0);
+	__raw_writel(((memsize - SZ_1M) & 0x1ff00000) | 1,
+		     chan->reg_base + SH4_PCILSR0);
+
+	/*
+	 * Hook up the ERR and SERR IRQs.
+	 */
+	ret = sh7780_pci_setup_irqs(chan);
+	if (unlikely(ret))
+		return ret;
+
+	/*
+	 * Disable the cache snoop controller for non-coherent DMA.
+	 */
+	__raw_writel(0, chan->reg_base + SH7780_PCICSCR0);
+	__raw_writel(0, chan->reg_base + SH7780_PCICSAR0);
+	__raw_writel(0, chan->reg_base + SH7780_PCICSCR1);
+	__raw_writel(0, chan->reg_base + SH7780_PCICSAR1);
+
+	/*
+	 * Setup the memory BARs
+	 */
+	for (i = 1; i < chan->nr_resources; i++) {
+		struct resource *res = chan->resources + i;
+		resource_size_t size;
+
+		if (unlikely(res->flags & IORESOURCE_IO))
+			continue;
+
+		/*
+		 * Make sure we're in the right physical addressing mode
+		 * for dealing with the resource.
+		 */
+		if ((res->flags & IORESOURCE_MEM_32BIT) && __in_29bit_mode()) {
+			chan->nr_resources--;
+			continue;
+		}
+
+		size = resource_size(res);
+
+		/*
+		 * The MBMR mask is calculated in units of 256kB, which
+		 * keeps things pretty simple.
+		 */
+		__raw_writel(((roundup_pow_of_two(size) / SZ_256K) - 1) << 18,
+			     chan->reg_base + SH7780_PCIMBMR(i - 1));
+		__raw_writel(res->start, chan->reg_base + SH7780_PCIMBR(i - 1));
+	}
+
+	/*
+	 * And I/O.
+	 */
+	__raw_writel(0, chan->reg_base + PCI_BASE_ADDRESS_0);
+	__raw_writel(0, chan->reg_base + SH7780_PCIIOBR);
+	__raw_writel(0, chan->reg_base + SH7780_PCIIOBMR);
+
+	__raw_writew(PCI_COMMAND_SERR   | PCI_COMMAND_WAIT   | \
+		     PCI_COMMAND_PARITY | PCI_COMMAND_MASTER | \
+		     PCI_COMMAND_MEMORY, chan->reg_base + PCI_COMMAND);
+
+	/*
+	 * Initialization mode complete, release the control register and
+	 * enable round robin mode to stop device overruns/starvation.
+	 */
+	__raw_writel(SH4_PCICR_PREFIX | SH4_PCICR_CFIN | SH4_PCICR_FTO |
+		     PCICR_ENDIANNESS,
+		     chan->reg_base + SH4_PCICR);
+
+	ret = register_pci_controller(chan);
+	if (unlikely(ret))
+		goto err;
+
+	sh7780_pci66_init(chan);
+
+	pr_notice("PCI: Running at %dMHz.\n",
+		  (__raw_readw(chan->reg_base + PCI_STATUS) & PCI_STATUS_66MHZ)
+		  ? 66 : 33);
+
+	return 0;
+
+err:
+	sh7780_pci_teardown_irqs(chan);
+	return ret;
+}
+arch_initcall(sh7780_pci_init);