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, 447 insertions, 0 deletions

diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c b/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c
new file mode 100644
index 000000000..a07e94fac
--- /dev/null
+++ b/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c
@@ -0,0 +1,447 @@
+/*
+ * Linux driver attachment glue for PCI based controllers.
+ *
+ * Copyright (c) 2000-2001 Adaptec Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c#47 $
+ */
+
+#include "aic7xxx_osm.h"
+#include "aic7xxx_pci.h"
+
+/* Define the macro locally since it's different for different class of chips.
+*/
+#define ID(x)	ID_C(x, PCI_CLASS_STORAGE_SCSI)
+
+static const struct pci_device_id ahc_linux_pci_id_table[] = {
+	/* aic7850 based controllers */
+	ID(ID_AHA_2902_04_10_15_20C_30C),
+	/* aic7860 based controllers */
+	ID(ID_AHA_2930CU),
+	ID(ID_AHA_1480A & ID_DEV_VENDOR_MASK),
+	ID(ID_AHA_2940AU_0 & ID_DEV_VENDOR_MASK),
+	ID(ID_AHA_2940AU_CN & ID_DEV_VENDOR_MASK),
+	ID(ID_AHA_2930C_VAR & ID_DEV_VENDOR_MASK),
+	/* aic7870 based controllers */
+	ID(ID_AHA_2940),
+	ID(ID_AHA_3940),
+	ID(ID_AHA_398X),
+	ID(ID_AHA_2944),
+	ID(ID_AHA_3944),
+	ID(ID_AHA_4944),
+	/* aic7880 based controllers */
+	ID(ID_AHA_2940U & ID_DEV_VENDOR_MASK),
+	ID(ID_AHA_3940U & ID_DEV_VENDOR_MASK),
+	ID(ID_AHA_2944U & ID_DEV_VENDOR_MASK),
+	ID(ID_AHA_3944U & ID_DEV_VENDOR_MASK),
+	ID(ID_AHA_398XU & ID_DEV_VENDOR_MASK),
+	ID(ID_AHA_4944U & ID_DEV_VENDOR_MASK),
+	ID(ID_AHA_2930U & ID_DEV_VENDOR_MASK),
+	ID(ID_AHA_2940U_PRO & ID_DEV_VENDOR_MASK),
+	ID(ID_AHA_2940U_CN & ID_DEV_VENDOR_MASK),
+	/* aic7890 based controllers */
+	ID(ID_AHA_2930U2),
+	ID(ID_AHA_2940U2B),
+	ID(ID_AHA_2940U2_OEM),
+	ID(ID_AHA_2940U2),
+	ID(ID_AHA_2950U2B),
+	ID16(ID_AIC7890_ARO & ID_AIC7895_ARO_MASK),
+	ID(ID_AAA_131U2),
+	/* aic7890 based controllers */
+	ID(ID_AHA_29160),
+	ID(ID_AHA_29160_CPQ),
+	ID(ID_AHA_29160N),
+	ID(ID_AHA_29160C),
+	ID(ID_AHA_29160B),
+	ID(ID_AHA_19160B),
+	ID(ID_AIC7892_ARO),
+	/* aic7892 based controllers */
+	ID(ID_AHA_2940U_DUAL),
+	ID(ID_AHA_3940AU),
+	ID(ID_AHA_3944AU),
+	ID(ID_AIC7895_ARO),
+	ID(ID_AHA_3950U2B_0),
+	ID(ID_AHA_3950U2B_1),
+	ID(ID_AHA_3950U2D_0),
+	ID(ID_AHA_3950U2D_1),
+	ID(ID_AIC7896_ARO),
+	/* aic7899 based controllers */
+	ID(ID_AHA_3960D),
+	ID(ID_AHA_3960D_CPQ),
+	ID(ID_AIC7899_ARO),
+	/* Generic chip probes for devices we don't know exactly. */
+	ID(ID_AIC7850 & ID_DEV_VENDOR_MASK),
+	ID(ID_AIC7855 & ID_DEV_VENDOR_MASK),
+	ID(ID_AIC7859 & ID_DEV_VENDOR_MASK),
+	ID(ID_AIC7860 & ID_DEV_VENDOR_MASK),
+	ID(ID_AIC7870 & ID_DEV_VENDOR_MASK),
+	ID(ID_AIC7880 & ID_DEV_VENDOR_MASK),
+ 	ID16(ID_AIC7890 & ID_9005_GENERIC_MASK),
+ 	ID16(ID_AIC7892 & ID_9005_GENERIC_MASK),
+	ID(ID_AIC7895 & ID_DEV_VENDOR_MASK),
+	ID16(ID_AIC7896 & ID_9005_GENERIC_MASK),
+	ID16(ID_AIC7899 & ID_9005_GENERIC_MASK),
+	ID(ID_AIC7810 & ID_DEV_VENDOR_MASK),
+	ID(ID_AIC7815 & ID_DEV_VENDOR_MASK),
+	{ 0 }
+};
+
+MODULE_DEVICE_TABLE(pci, ahc_linux_pci_id_table);
+
+static int __maybe_unused
+ahc_linux_pci_dev_suspend(struct device *dev)
+{
+	struct ahc_softc *ahc = dev_get_drvdata(dev);
+
+	return ahc_suspend(ahc);
+}
+
+static int __maybe_unused
+ahc_linux_pci_dev_resume(struct device *dev)
+{
+	struct ahc_softc *ahc = dev_get_drvdata(dev);
+
+	ahc_pci_resume(ahc);
+
+	return (ahc_resume(ahc));
+}
+
+static void
+ahc_linux_pci_dev_remove(struct pci_dev *pdev)
+{
+	struct ahc_softc *ahc = pci_get_drvdata(pdev);
+	u_long s;
+
+	if (ahc->platform_data && ahc->platform_data->host)
+			scsi_remove_host(ahc->platform_data->host);
+
+	ahc_lock(ahc, &s);
+	ahc_intr_enable(ahc, FALSE);
+	ahc_unlock(ahc, &s);
+	ahc_free(ahc);
+}
+
+static void
+ahc_linux_pci_inherit_flags(struct ahc_softc *ahc)
+{
+	struct pci_dev *pdev = ahc->dev_softc, *master_pdev;
+	unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);
+
+	master_pdev = pci_get_slot(pdev->bus, master_devfn);
+	if (master_pdev) {
+		struct ahc_softc *master = pci_get_drvdata(master_pdev);
+		if (master) {
+			ahc->flags &= ~AHC_BIOS_ENABLED; 
+			ahc->flags |= master->flags & AHC_BIOS_ENABLED;
+
+			ahc->flags &= ~AHC_PRIMARY_CHANNEL; 
+			ahc->flags |= master->flags & AHC_PRIMARY_CHANNEL;
+		} else
+			printk(KERN_ERR "aic7xxx: no multichannel peer found!\n");
+		pci_dev_put(master_pdev);
+	} 
+}
+
+static int
+ahc_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	char		 buf[80];
+	const uint64_t	 mask_39bit = 0x7FFFFFFFFFULL;
+	struct		 ahc_softc *ahc;
+	ahc_dev_softc_t	 pci;
+	const struct ahc_pci_identity *entry;
+	char		*name;
+	int		 error;
+	struct device	*dev = &pdev->dev;
+
+	pci = pdev;
+	entry = ahc_find_pci_device(pci);
+	if (entry == NULL)
+		return (-ENODEV);
+
+	/*
+	 * Allocate a softc for this card and
+	 * set it up for attachment by our
+	 * common detect routine.
+	 */
+	sprintf(buf, "ahc_pci:%d:%d:%d",
+		ahc_get_pci_bus(pci),
+		ahc_get_pci_slot(pci),
+		ahc_get_pci_function(pci));
+	name = kstrdup(buf, GFP_ATOMIC);
+	if (name == NULL)
+		return (-ENOMEM);
+	ahc = ahc_alloc(NULL, name);
+	if (ahc == NULL)
+		return (-ENOMEM);
+	if (pci_enable_device(pdev)) {
+		ahc_free(ahc);
+		return (-ENODEV);
+	}
+	pci_set_master(pdev);
+
+	if (sizeof(dma_addr_t) > 4
+	    && ahc->features & AHC_LARGE_SCBS
+	    && dma_set_mask(dev, mask_39bit) == 0
+	    && dma_get_required_mask(dev) > DMA_BIT_MASK(32)) {
+		ahc->flags |= AHC_39BIT_ADDRESSING;
+	} else {
+		if (dma_set_mask(dev, DMA_BIT_MASK(32))) {
+			ahc_free(ahc);
+			printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n");
+                	return (-ENODEV);
+		}
+	}
+	ahc->dev_softc = pci;
+	ahc->dev = &pci->dev;
+	error = ahc_pci_config(ahc, entry);
+	if (error != 0) {
+		ahc_free(ahc);
+		return (-error);
+	}
+
+	/*
+	 * Second Function PCI devices need to inherit some
+	 * settings from function 0.
+	 */
+	if ((ahc->features & AHC_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0)
+		ahc_linux_pci_inherit_flags(ahc);
+
+	pci_set_drvdata(pdev, ahc);
+	ahc_linux_register_host(ahc, &aic7xxx_driver_template);
+	return (0);
+}
+
+/******************************* PCI Routines *********************************/
+uint32_t
+ahc_pci_read_config(ahc_dev_softc_t pci, int reg, int width)
+{
+	switch (width) {
+	case 1:
+	{
+		uint8_t retval;
+
+		pci_read_config_byte(pci, reg, &retval);
+		return (retval);
+	}
+	case 2:
+	{
+		uint16_t retval;
+		pci_read_config_word(pci, reg, &retval);
+		return (retval);
+	}
+	case 4:
+	{
+		uint32_t retval;
+		pci_read_config_dword(pci, reg, &retval);
+		return (retval);
+	}
+	default:
+		panic("ahc_pci_read_config: Read size too big");
+		/* NOTREACHED */
+		return (0);
+	}
+}
+
+void
+ahc_pci_write_config(ahc_dev_softc_t pci, int reg, uint32_t value, int width)
+{
+	switch (width) {
+	case 1:
+		pci_write_config_byte(pci, reg, value);
+		break;
+	case 2:
+		pci_write_config_word(pci, reg, value);
+		break;
+	case 4:
+		pci_write_config_dword(pci, reg, value);
+		break;
+	default:
+		panic("ahc_pci_write_config: Write size too big");
+		/* NOTREACHED */
+	}
+}
+
+static SIMPLE_DEV_PM_OPS(ahc_linux_pci_dev_pm_ops,
+			 ahc_linux_pci_dev_suspend,
+			 ahc_linux_pci_dev_resume);
+
+static struct pci_driver aic7xxx_pci_driver = {
+	.name		= "aic7xxx",
+	.probe		= ahc_linux_pci_dev_probe,
+	.driver.pm	= &ahc_linux_pci_dev_pm_ops,
+	.remove		= ahc_linux_pci_dev_remove,
+	.id_table	= ahc_linux_pci_id_table
+};
+
+int
+ahc_linux_pci_init(void)
+{
+	return pci_register_driver(&aic7xxx_pci_driver);
+}
+
+void
+ahc_linux_pci_exit(void)
+{
+	pci_unregister_driver(&aic7xxx_pci_driver);
+}
+
+static int
+ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, resource_size_t *base)
+{
+	if (aic7xxx_allow_memio == 0)
+		return (ENOMEM);
+
+	*base = pci_resource_start(ahc->dev_softc, 0);
+	if (*base == 0)
+		return (ENOMEM);
+	if (!request_region(*base, 256, "aic7xxx"))
+		return (ENOMEM);
+	return (0);
+}
+
+static int
+ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc,
+				 resource_size_t *bus_addr,
+				 uint8_t __iomem **maddr)
+{
+	resource_size_t	start;
+	int	error;
+
+	error = 0;
+	start = pci_resource_start(ahc->dev_softc, 1);
+	if (start != 0) {
+		*bus_addr = start;
+		if (!request_mem_region(start, 0x1000, "aic7xxx"))
+			error = ENOMEM;
+		if (error == 0) {
+			*maddr = ioremap(start, 256);
+			if (*maddr == NULL) {
+				error = ENOMEM;
+				release_mem_region(start, 0x1000);
+			}
+		}
+	} else
+		error = ENOMEM;
+	return (error);
+}
+
+int
+ahc_pci_map_registers(struct ahc_softc *ahc)
+{
+	uint32_t command;
+	resource_size_t	base;
+	uint8_t	__iomem *maddr;
+	int	 error;
+
+	/*
+	 * If its allowed, we prefer memory mapped access.
+	 */
+	command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, 4);
+	command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
+	base = 0;
+	maddr = NULL;
+	error = ahc_linux_pci_reserve_mem_region(ahc, &base, &maddr);
+	if (error == 0) {
+		ahc->platform_data->mem_busaddr = base;
+		ahc->tag = BUS_SPACE_MEMIO;
+		ahc->bsh.maddr = maddr;
+		ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND,
+				     command | PCIM_CMD_MEMEN, 4);
+
+		/*
+		 * Do a quick test to see if memory mapped
+		 * I/O is functioning correctly.
+		 */
+		if (ahc_pci_test_register_access(ahc) != 0) {
+
+			printk("aic7xxx: PCI Device %d:%d:%d "
+			       "failed memory mapped test.  Using PIO.\n",
+			       ahc_get_pci_bus(ahc->dev_softc),
+			       ahc_get_pci_slot(ahc->dev_softc),
+			       ahc_get_pci_function(ahc->dev_softc));
+			iounmap(maddr);
+			release_mem_region(ahc->platform_data->mem_busaddr,
+					   0x1000);
+			ahc->bsh.maddr = NULL;
+			maddr = NULL;
+		} else
+			command |= PCIM_CMD_MEMEN;
+	} else {
+		printk("aic7xxx: PCI%d:%d:%d MEM region 0x%llx "
+		       "unavailable. Cannot memory map device.\n",
+		       ahc_get_pci_bus(ahc->dev_softc),
+		       ahc_get_pci_slot(ahc->dev_softc),
+		       ahc_get_pci_function(ahc->dev_softc),
+		       (unsigned long long)base);
+	}
+
+	/*
+	 * We always prefer memory mapped access.
+	 */
+	if (maddr == NULL) {
+
+		error = ahc_linux_pci_reserve_io_region(ahc, &base);
+		if (error == 0) {
+			ahc->tag = BUS_SPACE_PIO;
+			ahc->bsh.ioport = (u_long)base;
+			command |= PCIM_CMD_PORTEN;
+		} else {
+			printk("aic7xxx: PCI%d:%d:%d IO region 0x%llx[0..255] "
+			       "unavailable. Cannot map device.\n",
+			       ahc_get_pci_bus(ahc->dev_softc),
+			       ahc_get_pci_slot(ahc->dev_softc),
+			       ahc_get_pci_function(ahc->dev_softc),
+			       (unsigned long long)base);
+		}
+	}
+	ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, 4);
+	return (error);
+}
+
+int
+ahc_pci_map_int(struct ahc_softc *ahc)
+{
+	int error;
+
+	error = request_irq(ahc->dev_softc->irq, ahc_linux_isr,
+			    IRQF_SHARED, "aic7xxx", ahc);
+	if (error == 0)
+		ahc->platform_data->irq = ahc->dev_softc->irq;
+	
+	return (-error);
+}
+