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, 493 insertions, 0 deletions

diff --git a/drivers/ata/ahci_dwc.c b/drivers/ata/ahci_dwc.c
new file mode 100644
index 000000000..8fb66860d
--- /dev/null
+++ b/drivers/ata/ahci_dwc.c
@@ -0,0 +1,493 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * DWC AHCI SATA Platform driver
+ *
+ * Copyright (C) 2021 BAIKAL ELECTRONICS, JSC
+ */
+
+#include <linux/ahci_platform.h>
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/libata.h>
+#include <linux/log2.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+#include <linux/regmap.h>
+
+#include "ahci.h"
+
+#define DRV_NAME "ahci-dwc"
+
+#define AHCI_DWC_FBS_PMPN_MAX		15
+
+/* DWC AHCI SATA controller specific registers */
+#define AHCI_DWC_HOST_OOBR		0xbc
+#define AHCI_DWC_HOST_OOB_WE		BIT(31)
+#define AHCI_DWC_HOST_CWMIN_MASK	GENMASK(30, 24)
+#define AHCI_DWC_HOST_CWMAX_MASK	GENMASK(23, 16)
+#define AHCI_DWC_HOST_CIMIN_MASK	GENMASK(15, 8)
+#define AHCI_DWC_HOST_CIMAX_MASK	GENMASK(7, 0)
+
+#define AHCI_DWC_HOST_GPCR		0xd0
+#define AHCI_DWC_HOST_GPSR		0xd4
+
+#define AHCI_DWC_HOST_TIMER1MS		0xe0
+#define AHCI_DWC_HOST_TIMV_MASK		GENMASK(19, 0)
+
+#define AHCI_DWC_HOST_GPARAM1R		0xe8
+#define AHCI_DWC_HOST_ALIGN_M		BIT(31)
+#define AHCI_DWC_HOST_RX_BUFFER		BIT(30)
+#define AHCI_DWC_HOST_PHY_DATA_MASK	GENMASK(29, 28)
+#define AHCI_DWC_HOST_PHY_RST		BIT(27)
+#define AHCI_DWC_HOST_PHY_CTRL_MASK	GENMASK(26, 21)
+#define AHCI_DWC_HOST_PHY_STAT_MASK	GENMASK(20, 15)
+#define AHCI_DWC_HOST_LATCH_M		BIT(14)
+#define AHCI_DWC_HOST_PHY_TYPE_MASK	GENMASK(13, 11)
+#define AHCI_DWC_HOST_RET_ERR		BIT(10)
+#define AHCI_DWC_HOST_AHB_ENDIAN_MASK	GENMASK(9, 8)
+#define AHCI_DWC_HOST_S_HADDR		BIT(7)
+#define AHCI_DWC_HOST_M_HADDR		BIT(6)
+#define AHCI_DWC_HOST_S_HDATA_MASK	GENMASK(5, 3)
+#define AHCI_DWC_HOST_M_HDATA_MASK	GENMASK(2, 0)
+
+#define AHCI_DWC_HOST_GPARAM2R		0xec
+#define AHCI_DWC_HOST_FBS_MEM_S		BIT(19)
+#define AHCI_DWC_HOST_FBS_PMPN_MASK	GENMASK(17, 16)
+#define AHCI_DWC_HOST_FBS_SUP		BIT(15)
+#define AHCI_DWC_HOST_DEV_CP		BIT(14)
+#define AHCI_DWC_HOST_DEV_MP		BIT(13)
+#define AHCI_DWC_HOST_ENCODE_M		BIT(12)
+#define AHCI_DWC_HOST_RXOOB_CLK_M	BIT(11)
+#define AHCI_DWC_HOST_RXOOB_M		BIT(10)
+#define AHCI_DWC_HOST_TXOOB_M		BIT(9)
+#define AHCI_DWC_HOST_RXOOB_M		BIT(10)
+#define AHCI_DWC_HOST_RXOOB_CLK_MASK	GENMASK(8, 0)
+
+#define AHCI_DWC_HOST_PPARAMR		0xf0
+#define AHCI_DWC_HOST_TX_MEM_M		BIT(11)
+#define AHCI_DWC_HOST_TX_MEM_S		BIT(10)
+#define AHCI_DWC_HOST_RX_MEM_M		BIT(9)
+#define AHCI_DWC_HOST_RX_MEM_S		BIT(8)
+#define AHCI_DWC_HOST_TXFIFO_DEPTH	GENMASK(7, 4)
+#define AHCI_DWC_HOST_RXFIFO_DEPTH	GENMASK(3, 0)
+
+#define AHCI_DWC_HOST_TESTR		0xf4
+#define AHCI_DWC_HOST_PSEL_MASK		GENMASK(18, 16)
+#define AHCI_DWC_HOST_TEST_IF		BIT(0)
+
+#define AHCI_DWC_HOST_VERSIONR		0xf8
+#define AHCI_DWC_HOST_IDR		0xfc
+
+#define AHCI_DWC_PORT_DMACR		0x70
+#define AHCI_DWC_PORT_RXABL_MASK	GENMASK(15, 12)
+#define AHCI_DWC_PORT_TXABL_MASK	GENMASK(11, 8)
+#define AHCI_DWC_PORT_RXTS_MASK		GENMASK(7, 4)
+#define AHCI_DWC_PORT_TXTS_MASK		GENMASK(3, 0)
+#define AHCI_DWC_PORT_PHYCR		0x74
+#define AHCI_DWC_PORT_PHYSR		0x78
+
+/* Baikal-T1 AHCI SATA specific registers */
+#define AHCI_BT1_HOST_PHYCR		AHCI_DWC_HOST_GPCR
+#define AHCI_BT1_HOST_MPLM_MASK		GENMASK(29, 23)
+#define AHCI_BT1_HOST_LOSDT_MASK	GENMASK(22, 20)
+#define AHCI_BT1_HOST_CRR		BIT(19)
+#define AHCI_BT1_HOST_CRW		BIT(18)
+#define AHCI_BT1_HOST_CRCD		BIT(17)
+#define AHCI_BT1_HOST_CRCA		BIT(16)
+#define AHCI_BT1_HOST_CRDI_MASK		GENMASK(15, 0)
+
+#define AHCI_BT1_HOST_PHYSR		AHCI_DWC_HOST_GPSR
+#define AHCI_BT1_HOST_CRA		BIT(16)
+#define AHCI_BT1_HOST_CRDO_MASK		GENMASK(15, 0)
+
+struct ahci_dwc_plat_data {
+	unsigned int pflags;
+	unsigned int hflags;
+	int (*init)(struct ahci_host_priv *hpriv);
+	int (*reinit)(struct ahci_host_priv *hpriv);
+	void (*clear)(struct ahci_host_priv *hpriv);
+};
+
+struct ahci_dwc_host_priv {
+	const struct ahci_dwc_plat_data *pdata;
+	struct platform_device *pdev;
+
+	u32 timv;
+	u32 dmacr[AHCI_MAX_PORTS];
+};
+
+static int ahci_bt1_init(struct ahci_host_priv *hpriv)
+{
+	struct ahci_dwc_host_priv *dpriv = hpriv->plat_data;
+	int ret;
+
+	/* APB, application and reference clocks are required */
+	if (!ahci_platform_find_clk(hpriv, "pclk") ||
+	    !ahci_platform_find_clk(hpriv, "aclk") ||
+	    !ahci_platform_find_clk(hpriv, "ref")) {
+		dev_err(&dpriv->pdev->dev, "No system clocks specified\n");
+		return -EINVAL;
+	}
+
+	/*
+	 * Fully reset the SATA AXI and ref clocks domain to ensure the state
+	 * machine is working from scratch especially if the reference clocks
+	 * source has been changed.
+	 */
+	ret = ahci_platform_assert_rsts(hpriv);
+	if (ret) {
+		dev_err(&dpriv->pdev->dev, "Couldn't assert the resets\n");
+		return ret;
+	}
+
+	ret = ahci_platform_deassert_rsts(hpriv);
+	if (ret) {
+		dev_err(&dpriv->pdev->dev, "Couldn't de-assert the resets\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static struct ahci_host_priv *ahci_dwc_get_resources(struct platform_device *pdev)
+{
+	struct ahci_dwc_host_priv *dpriv;
+	struct ahci_host_priv *hpriv;
+
+	dpriv = devm_kzalloc(&pdev->dev, sizeof(*dpriv), GFP_KERNEL);
+	if (!dpriv)
+		return ERR_PTR(-ENOMEM);
+
+	dpriv->pdev = pdev;
+	dpriv->pdata = device_get_match_data(&pdev->dev);
+	if (!dpriv->pdata)
+		return ERR_PTR(-EINVAL);
+
+	hpriv = ahci_platform_get_resources(pdev, dpriv->pdata->pflags);
+	if (IS_ERR(hpriv))
+		return hpriv;
+
+	hpriv->flags |= dpriv->pdata->hflags;
+	hpriv->plat_data = (void *)dpriv;
+
+	return hpriv;
+}
+
+static void ahci_dwc_check_cap(struct ahci_host_priv *hpriv)
+{
+	unsigned long port_map = hpriv->saved_port_map | hpriv->mask_port_map;
+	struct ahci_dwc_host_priv *dpriv = hpriv->plat_data;
+	bool dev_mp, dev_cp, fbs_sup;
+	unsigned int fbs_pmp;
+	u32 param;
+	int i;
+
+	param = readl(hpriv->mmio + AHCI_DWC_HOST_GPARAM2R);
+	dev_mp = !!(param & AHCI_DWC_HOST_DEV_MP);
+	dev_cp = !!(param & AHCI_DWC_HOST_DEV_CP);
+	fbs_sup = !!(param & AHCI_DWC_HOST_FBS_SUP);
+	fbs_pmp = 5 * FIELD_GET(AHCI_DWC_HOST_FBS_PMPN_MASK, param);
+
+	if (!dev_mp && hpriv->saved_cap & HOST_CAP_MPS) {
+		dev_warn(&dpriv->pdev->dev, "MPS is unsupported\n");
+		hpriv->saved_cap &= ~HOST_CAP_MPS;
+	}
+
+
+	if (fbs_sup && fbs_pmp < AHCI_DWC_FBS_PMPN_MAX) {
+		dev_warn(&dpriv->pdev->dev, "PMPn is limited up to %u ports\n",
+			 fbs_pmp);
+	}
+
+	for_each_set_bit(i, &port_map, AHCI_MAX_PORTS) {
+		if (!dev_mp && hpriv->saved_port_cap[i] & PORT_CMD_MPSP) {
+			dev_warn(&dpriv->pdev->dev, "MPS incapable port %d\n", i);
+			hpriv->saved_port_cap[i] &= ~PORT_CMD_MPSP;
+		}
+
+		if (!dev_cp && hpriv->saved_port_cap[i] & PORT_CMD_CPD) {
+			dev_warn(&dpriv->pdev->dev, "CPD incapable port %d\n", i);
+			hpriv->saved_port_cap[i] &= ~PORT_CMD_CPD;
+		}
+
+		if (!fbs_sup && hpriv->saved_port_cap[i] & PORT_CMD_FBSCP) {
+			dev_warn(&dpriv->pdev->dev, "FBS incapable port %d\n", i);
+			hpriv->saved_port_cap[i] &= ~PORT_CMD_FBSCP;
+		}
+	}
+}
+
+static void ahci_dwc_init_timer(struct ahci_host_priv *hpriv)
+{
+	struct ahci_dwc_host_priv *dpriv = hpriv->plat_data;
+	unsigned long rate;
+	struct clk *aclk;
+	u32 cap, cap2;
+
+	/* 1ms tick is generated only for the CCC or DevSleep features */
+	cap = readl(hpriv->mmio + HOST_CAP);
+	cap2 = readl(hpriv->mmio + HOST_CAP2);
+	if (!(cap & HOST_CAP_CCC) && !(cap2 & HOST_CAP2_SDS))
+		return;
+
+	/*
+	 * Tick is generated based on the AXI/AHB application clocks signal
+	 * so we need to be sure in the clock we are going to use.
+	 */
+	aclk = ahci_platform_find_clk(hpriv, "aclk");
+	if (!aclk)
+		return;
+
+	/* 1ms timer interval is set as TIMV = AMBA_FREQ[MHZ] * 1000 */
+	dpriv->timv = readl(hpriv->mmio + AHCI_DWC_HOST_TIMER1MS);
+	dpriv->timv = FIELD_GET(AHCI_DWC_HOST_TIMV_MASK, dpriv->timv);
+	rate = clk_get_rate(aclk) / 1000UL;
+	if (rate == dpriv->timv)
+		return;
+
+	dev_info(&dpriv->pdev->dev, "Update CCC/DevSlp timer for Fapp %lu MHz\n",
+		 rate / 1000UL);
+	dpriv->timv = FIELD_PREP(AHCI_DWC_HOST_TIMV_MASK, rate);
+	writel(dpriv->timv, hpriv->mmio + AHCI_DWC_HOST_TIMER1MS);
+}
+
+static int ahci_dwc_init_dmacr(struct ahci_host_priv *hpriv)
+{
+	struct ahci_dwc_host_priv *dpriv = hpriv->plat_data;
+	struct device_node *child;
+	void __iomem *port_mmio;
+	u32 port, dmacr, ts;
+
+	/*
+	 * Update the DMA Tx/Rx transaction sizes in accordance with the
+	 * platform setup. Note values exceeding maximal or minimal limits will
+	 * be automatically clamped. Also note the register isn't affected by
+	 * the HBA global reset so we can freely initialize it once until the
+	 * next system reset.
+	 */
+	for_each_child_of_node(dpriv->pdev->dev.of_node, child) {
+		if (!of_device_is_available(child))
+			continue;
+
+		if (of_property_read_u32(child, "reg", &port)) {
+			of_node_put(child);
+			return -EINVAL;
+		}
+
+		port_mmio = __ahci_port_base(hpriv, port);
+		dmacr = readl(port_mmio + AHCI_DWC_PORT_DMACR);
+
+		if (!of_property_read_u32(child, "snps,tx-ts-max", &ts)) {
+			ts = ilog2(ts);
+			dmacr &= ~AHCI_DWC_PORT_TXTS_MASK;
+			dmacr |= FIELD_PREP(AHCI_DWC_PORT_TXTS_MASK, ts);
+		}
+
+		if (!of_property_read_u32(child, "snps,rx-ts-max", &ts)) {
+			ts = ilog2(ts);
+			dmacr &= ~AHCI_DWC_PORT_RXTS_MASK;
+			dmacr |= FIELD_PREP(AHCI_DWC_PORT_RXTS_MASK, ts);
+		}
+
+		writel(dmacr, port_mmio + AHCI_DWC_PORT_DMACR);
+		dpriv->dmacr[port] = dmacr;
+	}
+
+	return 0;
+}
+
+static int ahci_dwc_init_host(struct ahci_host_priv *hpriv)
+{
+	struct ahci_dwc_host_priv *dpriv = hpriv->plat_data;
+	int rc;
+
+	rc = ahci_platform_enable_resources(hpriv);
+	if (rc)
+		return rc;
+
+	if (dpriv->pdata->init) {
+		rc = dpriv->pdata->init(hpriv);
+		if (rc)
+			goto err_disable_resources;
+	}
+
+	ahci_dwc_check_cap(hpriv);
+
+	ahci_dwc_init_timer(hpriv);
+
+	rc = ahci_dwc_init_dmacr(hpriv);
+	if (rc)
+		goto err_clear_platform;
+
+	return 0;
+
+err_clear_platform:
+	if (dpriv->pdata->clear)
+		dpriv->pdata->clear(hpriv);
+
+err_disable_resources:
+	ahci_platform_disable_resources(hpriv);
+
+	return rc;
+}
+
+static int ahci_dwc_reinit_host(struct ahci_host_priv *hpriv)
+{
+	struct ahci_dwc_host_priv *dpriv = hpriv->plat_data;
+	unsigned long port_map = hpriv->port_map;
+	void __iomem *port_mmio;
+	int i, rc;
+
+	rc = ahci_platform_enable_resources(hpriv);
+	if (rc)
+		return rc;
+
+	if (dpriv->pdata->reinit) {
+		rc = dpriv->pdata->reinit(hpriv);
+		if (rc)
+			goto err_disable_resources;
+	}
+
+	writel(dpriv->timv, hpriv->mmio + AHCI_DWC_HOST_TIMER1MS);
+
+	for_each_set_bit(i, &port_map, AHCI_MAX_PORTS) {
+		port_mmio = __ahci_port_base(hpriv, i);
+		writel(dpriv->dmacr[i], port_mmio + AHCI_DWC_PORT_DMACR);
+	}
+
+	return 0;
+
+err_disable_resources:
+	ahci_platform_disable_resources(hpriv);
+
+	return rc;
+}
+
+static void ahci_dwc_clear_host(struct ahci_host_priv *hpriv)
+{
+	struct ahci_dwc_host_priv *dpriv = hpriv->plat_data;
+
+	if (dpriv->pdata->clear)
+		dpriv->pdata->clear(hpriv);
+
+	ahci_platform_disable_resources(hpriv);
+}
+
+static void ahci_dwc_stop_host(struct ata_host *host)
+{
+	struct ahci_host_priv *hpriv = host->private_data;
+
+	ahci_dwc_clear_host(hpriv);
+}
+
+static struct ata_port_operations ahci_dwc_port_ops = {
+	.inherits	= &ahci_platform_ops,
+	.host_stop	= ahci_dwc_stop_host,
+};
+
+static const struct ata_port_info ahci_dwc_port_info = {
+	.flags		= AHCI_FLAG_COMMON,
+	.pio_mask	= ATA_PIO4,
+	.udma_mask	= ATA_UDMA6,
+	.port_ops	= &ahci_dwc_port_ops,
+};
+
+static struct scsi_host_template ahci_dwc_scsi_info = {
+	AHCI_SHT(DRV_NAME),
+};
+
+static int ahci_dwc_probe(struct platform_device *pdev)
+{
+	struct ahci_host_priv *hpriv;
+	int rc;
+
+	hpriv = ahci_dwc_get_resources(pdev);
+	if (IS_ERR(hpriv))
+		return PTR_ERR(hpriv);
+
+	rc = ahci_dwc_init_host(hpriv);
+	if (rc)
+		return rc;
+
+	rc = ahci_platform_init_host(pdev, hpriv, &ahci_dwc_port_info,
+				     &ahci_dwc_scsi_info);
+	if (rc)
+		goto err_clear_host;
+
+	return 0;
+
+err_clear_host:
+	ahci_dwc_clear_host(hpriv);
+
+	return rc;
+}
+
+static int ahci_dwc_suspend(struct device *dev)
+{
+	struct ata_host *host = dev_get_drvdata(dev);
+	struct ahci_host_priv *hpriv = host->private_data;
+	int rc;
+
+	rc = ahci_platform_suspend_host(dev);
+	if (rc)
+		return rc;
+
+	ahci_dwc_clear_host(hpriv);
+
+	return 0;
+}
+
+static int ahci_dwc_resume(struct device *dev)
+{
+	struct ata_host *host = dev_get_drvdata(dev);
+	struct ahci_host_priv *hpriv = host->private_data;
+	int rc;
+
+	rc = ahci_dwc_reinit_host(hpriv);
+	if (rc)
+		return rc;
+
+	return ahci_platform_resume_host(dev);
+}
+
+static DEFINE_SIMPLE_DEV_PM_OPS(ahci_dwc_pm_ops, ahci_dwc_suspend,
+				ahci_dwc_resume);
+
+static struct ahci_dwc_plat_data ahci_dwc_plat = {
+	.pflags = AHCI_PLATFORM_GET_RESETS,
+};
+
+static struct ahci_dwc_plat_data ahci_bt1_plat = {
+	.pflags = AHCI_PLATFORM_GET_RESETS | AHCI_PLATFORM_RST_TRIGGER,
+	.init = ahci_bt1_init,
+};
+
+static const struct of_device_id ahci_dwc_of_match[] = {
+	{ .compatible = "snps,dwc-ahci", &ahci_dwc_plat },
+	{ .compatible = "snps,spear-ahci", &ahci_dwc_plat },
+	{ .compatible = "baikal,bt1-ahci", &ahci_bt1_plat },
+	{},
+};
+MODULE_DEVICE_TABLE(of, ahci_dwc_of_match);
+
+static struct platform_driver ahci_dwc_driver = {
+	.probe = ahci_dwc_probe,
+	.remove = ata_platform_remove_one,
+	.shutdown = ahci_platform_shutdown,
+	.driver = {
+		.name = DRV_NAME,
+		.of_match_table = ahci_dwc_of_match,
+		.pm = &ahci_dwc_pm_ops,
+	},
+};
+module_platform_driver(ahci_dwc_driver);
+
+MODULE_DESCRIPTION("DWC AHCI SATA platform driver");
+MODULE_AUTHOR("Serge Semin <Sergey.Semin@baikalelectronics.ru>");
+MODULE_LICENSE("GPL");