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, 617 insertions, 0 deletions

diff --git a/drivers/scsi/aic94xx/aic94xx_task.c b/drivers/scsi/aic94xx/aic94xx_task.c
new file mode 100644
index 000000000..ed119a3f6
--- /dev/null
+++ b/drivers/scsi/aic94xx/aic94xx_task.c
@@ -0,0 +1,617 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Aic94xx SAS/SATA Tasks
+ *
+ * Copyright (C) 2005 Adaptec, Inc.  All rights reserved.
+ * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
+ */
+
+#include <linux/spinlock.h>
+#include "aic94xx.h"
+#include "aic94xx_sas.h"
+#include "aic94xx_hwi.h"
+
+static void asd_unbuild_ata_ascb(struct asd_ascb *a);
+static void asd_unbuild_smp_ascb(struct asd_ascb *a);
+static void asd_unbuild_ssp_ascb(struct asd_ascb *a);
+
+static void asd_can_dequeue(struct asd_ha_struct *asd_ha, int num)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&asd_ha->seq.pend_q_lock, flags);
+	asd_ha->seq.can_queue += num;
+	spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags);
+}
+
+/* DMA_... to our direction translation.
+ */
+static const u8 data_dir_flags[] = {
+	[DMA_BIDIRECTIONAL]	= DATA_DIR_BYRECIPIENT,	/* UNSPECIFIED */
+	[DMA_TO_DEVICE]		= DATA_DIR_OUT,		/* OUTBOUND */
+	[DMA_FROM_DEVICE]	= DATA_DIR_IN,		/* INBOUND */
+	[DMA_NONE]		= DATA_DIR_NONE,	/* NO TRANSFER */
+};
+
+static int asd_map_scatterlist(struct sas_task *task,
+			       struct sg_el *sg_arr,
+			       gfp_t gfp_flags)
+{
+	struct asd_ascb *ascb = task->lldd_task;
+	struct asd_ha_struct *asd_ha = ascb->ha;
+	struct scatterlist *sc;
+	int num_sg, res;
+
+	if (task->data_dir == DMA_NONE)
+		return 0;
+
+	if (task->num_scatter == 0) {
+		void *p = task->scatter;
+		dma_addr_t dma = dma_map_single(&asd_ha->pcidev->dev, p,
+						task->total_xfer_len,
+						task->data_dir);
+		sg_arr[0].bus_addr = cpu_to_le64((u64)dma);
+		sg_arr[0].size = cpu_to_le32(task->total_xfer_len);
+		sg_arr[0].flags |= ASD_SG_EL_LIST_EOL;
+		return 0;
+	}
+
+	/* STP tasks come from libata which has already mapped
+	 * the SG list */
+	if (sas_protocol_ata(task->task_proto))
+		num_sg = task->num_scatter;
+	else
+		num_sg = dma_map_sg(&asd_ha->pcidev->dev, task->scatter,
+				    task->num_scatter, task->data_dir);
+	if (num_sg == 0)
+		return -ENOMEM;
+
+	if (num_sg > 3) {
+		int i;
+
+		ascb->sg_arr = asd_alloc_coherent(asd_ha,
+						  num_sg*sizeof(struct sg_el),
+						  gfp_flags);
+		if (!ascb->sg_arr) {
+			res = -ENOMEM;
+			goto err_unmap;
+		}
+		for_each_sg(task->scatter, sc, num_sg, i) {
+			struct sg_el *sg =
+				&((struct sg_el *)ascb->sg_arr->vaddr)[i];
+			sg->bus_addr = cpu_to_le64((u64)sg_dma_address(sc));
+			sg->size = cpu_to_le32((u32)sg_dma_len(sc));
+			if (i == num_sg-1)
+				sg->flags |= ASD_SG_EL_LIST_EOL;
+		}
+
+		for_each_sg(task->scatter, sc, 2, i) {
+			sg_arr[i].bus_addr =
+				cpu_to_le64((u64)sg_dma_address(sc));
+			sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc));
+		}
+		sg_arr[1].next_sg_offs = 2 * sizeof(*sg_arr);
+		sg_arr[1].flags |= ASD_SG_EL_LIST_EOS;
+
+		memset(&sg_arr[2], 0, sizeof(*sg_arr));
+		sg_arr[2].bus_addr=cpu_to_le64((u64)ascb->sg_arr->dma_handle);
+	} else {
+		int i;
+		for_each_sg(task->scatter, sc, num_sg, i) {
+			sg_arr[i].bus_addr =
+				cpu_to_le64((u64)sg_dma_address(sc));
+			sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc));
+		}
+		sg_arr[i-1].flags |= ASD_SG_EL_LIST_EOL;
+	}
+
+	return 0;
+err_unmap:
+	if (sas_protocol_ata(task->task_proto))
+		dma_unmap_sg(&asd_ha->pcidev->dev, task->scatter,
+			     task->num_scatter, task->data_dir);
+	return res;
+}
+
+static void asd_unmap_scatterlist(struct asd_ascb *ascb)
+{
+	struct asd_ha_struct *asd_ha = ascb->ha;
+	struct sas_task *task = ascb->uldd_task;
+
+	if (task->data_dir == DMA_NONE)
+		return;
+
+	if (task->num_scatter == 0) {
+		dma_addr_t dma = (dma_addr_t)
+		       le64_to_cpu(ascb->scb->ssp_task.sg_element[0].bus_addr);
+		dma_unmap_single(&ascb->ha->pcidev->dev, dma,
+				 task->total_xfer_len, task->data_dir);
+		return;
+	}
+
+	asd_free_coherent(asd_ha, ascb->sg_arr);
+	if (task->task_proto != SAS_PROTOCOL_STP)
+		dma_unmap_sg(&asd_ha->pcidev->dev, task->scatter,
+			     task->num_scatter, task->data_dir);
+}
+
+/* ---------- Task complete tasklet ---------- */
+
+static void asd_get_response_tasklet(struct asd_ascb *ascb,
+				     struct done_list_struct *dl)
+{
+	struct asd_ha_struct *asd_ha = ascb->ha;
+	struct sas_task *task = ascb->uldd_task;
+	struct task_status_struct *ts = &task->task_status;
+	unsigned long flags;
+	struct tc_resp_sb_struct {
+		__le16 index_escb;
+		u8     len_lsb;
+		u8     flags;
+	} __attribute__ ((packed)) *resp_sb = (void *) dl->status_block;
+
+/* 	int  size   = ((resp_sb->flags & 7) << 8) | resp_sb->len_lsb; */
+	int  edb_id = ((resp_sb->flags & 0x70) >> 4)-1;
+	struct asd_ascb *escb;
+	struct asd_dma_tok *edb;
+	void *r;
+
+	spin_lock_irqsave(&asd_ha->seq.tc_index_lock, flags);
+	escb = asd_tc_index_find(&asd_ha->seq,
+				 (int)le16_to_cpu(resp_sb->index_escb));
+	spin_unlock_irqrestore(&asd_ha->seq.tc_index_lock, flags);
+
+	if (!escb) {
+		ASD_DPRINTK("Uh-oh! No escb for this dl?!\n");
+		return;
+	}
+
+	ts->buf_valid_size = 0;
+	edb = asd_ha->seq.edb_arr[edb_id + escb->edb_index];
+	r = edb->vaddr;
+	if (task->task_proto == SAS_PROTOCOL_SSP) {
+		struct ssp_response_iu *iu =
+			r + 16 + sizeof(struct ssp_frame_hdr);
+
+		ts->residual = le32_to_cpu(*(__le32 *)r);
+
+		sas_ssp_task_response(&asd_ha->pcidev->dev, task, iu);
+	}  else {
+		struct ata_task_resp *resp = (void *) &ts->buf[0];
+
+		ts->residual = le32_to_cpu(*(__le32 *)r);
+
+		if (SAS_STATUS_BUF_SIZE >= sizeof(*resp)) {
+			resp->frame_len = le16_to_cpu(*(__le16 *)(r+6));
+			memcpy(&resp->ending_fis[0], r+16, ATA_RESP_FIS_SIZE);
+			ts->buf_valid_size = sizeof(*resp);
+		}
+	}
+
+	asd_invalidate_edb(escb, edb_id);
+}
+
+static void asd_task_tasklet_complete(struct asd_ascb *ascb,
+				      struct done_list_struct *dl)
+{
+	struct sas_task *task = ascb->uldd_task;
+	struct task_status_struct *ts = &task->task_status;
+	unsigned long flags;
+	u8 opcode = dl->opcode;
+
+	asd_can_dequeue(ascb->ha, 1);
+
+Again:
+	switch (opcode) {
+	case TC_NO_ERROR:
+		ts->resp = SAS_TASK_COMPLETE;
+		ts->stat = SAS_SAM_STAT_GOOD;
+		break;
+	case TC_UNDERRUN:
+		ts->resp = SAS_TASK_COMPLETE;
+		ts->stat = SAS_DATA_UNDERRUN;
+		ts->residual = le32_to_cpu(*(__le32 *)dl->status_block);
+		break;
+	case TC_OVERRUN:
+		ts->resp = SAS_TASK_COMPLETE;
+		ts->stat = SAS_DATA_OVERRUN;
+		ts->residual = 0;
+		break;
+	case TC_SSP_RESP:
+	case TC_ATA_RESP:
+		ts->resp = SAS_TASK_COMPLETE;
+		ts->stat = SAS_PROTO_RESPONSE;
+		asd_get_response_tasklet(ascb, dl);
+		break;
+	case TF_OPEN_REJECT:
+		ts->resp = SAS_TASK_UNDELIVERED;
+		ts->stat = SAS_OPEN_REJECT;
+		if (dl->status_block[1] & 2)
+			ts->open_rej_reason = 1 + dl->status_block[2];
+		else if (dl->status_block[1] & 1)
+			ts->open_rej_reason = (dl->status_block[2] >> 4)+10;
+		else
+			ts->open_rej_reason = SAS_OREJ_UNKNOWN;
+		break;
+	case TF_OPEN_TO:
+		ts->resp = SAS_TASK_UNDELIVERED;
+		ts->stat = SAS_OPEN_TO;
+		break;
+	case TF_PHY_DOWN:
+	case TU_PHY_DOWN:
+		ts->resp = SAS_TASK_UNDELIVERED;
+		ts->stat = SAS_PHY_DOWN;
+		break;
+	case TI_PHY_DOWN:
+		ts->resp = SAS_TASK_COMPLETE;
+		ts->stat = SAS_PHY_DOWN;
+		break;
+	case TI_BREAK:
+	case TI_PROTO_ERR:
+	case TI_NAK:
+	case TI_ACK_NAK_TO:
+	case TF_SMP_XMIT_RCV_ERR:
+	case TC_ATA_R_ERR_RECV:
+		ts->resp = SAS_TASK_COMPLETE;
+		ts->stat = SAS_INTERRUPTED;
+		break;
+	case TF_BREAK:
+	case TU_BREAK:
+	case TU_ACK_NAK_TO:
+	case TF_SMPRSP_TO:
+		ts->resp = SAS_TASK_UNDELIVERED;
+		ts->stat = SAS_DEV_NO_RESPONSE;
+		break;
+	case TF_NAK_RECV:
+		ts->resp = SAS_TASK_COMPLETE;
+		ts->stat = SAS_NAK_R_ERR;
+		break;
+	case TA_I_T_NEXUS_LOSS:
+		opcode = dl->status_block[0];
+		goto Again;
+	case TF_INV_CONN_HANDLE:
+		ts->resp = SAS_TASK_UNDELIVERED;
+		ts->stat = SAS_DEVICE_UNKNOWN;
+		break;
+	case TF_REQUESTED_N_PENDING:
+		ts->resp = SAS_TASK_UNDELIVERED;
+		ts->stat = SAS_PENDING;
+		break;
+	case TC_TASK_CLEARED:
+	case TA_ON_REQ:
+		ts->resp = SAS_TASK_COMPLETE;
+		ts->stat = SAS_ABORTED_TASK;
+		break;
+
+	case TF_NO_SMP_CONN:
+	case TF_TMF_NO_CTX:
+	case TF_TMF_NO_TAG:
+	case TF_TMF_TAG_FREE:
+	case TF_TMF_TASK_DONE:
+	case TF_TMF_NO_CONN_HANDLE:
+	case TF_IRTT_TO:
+	case TF_IU_SHORT:
+	case TF_DATA_OFFS_ERR:
+		ts->resp = SAS_TASK_UNDELIVERED;
+		ts->stat = SAS_DEV_NO_RESPONSE;
+		break;
+
+	case TC_LINK_ADM_RESP:
+	case TC_CONTROL_PHY:
+	case TC_RESUME:
+	case TC_PARTIAL_SG_LIST:
+	default:
+		ASD_DPRINTK("%s: dl opcode: 0x%x?\n", __func__, opcode);
+		break;
+	}
+
+	switch (task->task_proto) {
+	case SAS_PROTOCOL_SATA:
+	case SAS_PROTOCOL_STP:
+		asd_unbuild_ata_ascb(ascb);
+		break;
+	case SAS_PROTOCOL_SMP:
+		asd_unbuild_smp_ascb(ascb);
+		break;
+	case SAS_PROTOCOL_SSP:
+		asd_unbuild_ssp_ascb(ascb);
+		break;
+	default:
+		break;
+	}
+
+	spin_lock_irqsave(&task->task_state_lock, flags);
+	task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
+	task->task_state_flags |= SAS_TASK_STATE_DONE;
+	if (unlikely((task->task_state_flags & SAS_TASK_STATE_ABORTED))) {
+		struct completion *completion = ascb->completion;
+		spin_unlock_irqrestore(&task->task_state_lock, flags);
+		ASD_DPRINTK("task 0x%p done with opcode 0x%x resp 0x%x "
+			    "stat 0x%x but aborted by upper layer!\n",
+			    task, opcode, ts->resp, ts->stat);
+		if (completion)
+			complete(completion);
+	} else {
+		spin_unlock_irqrestore(&task->task_state_lock, flags);
+		task->lldd_task = NULL;
+		asd_ascb_free(ascb);
+		mb();
+		task->task_done(task);
+	}
+}
+
+/* ---------- ATA ---------- */
+
+static int asd_build_ata_ascb(struct asd_ascb *ascb, struct sas_task *task,
+			      gfp_t gfp_flags)
+{
+	struct domain_device *dev = task->dev;
+	struct scb *scb;
+	u8     flags;
+	int    res = 0;
+
+	scb = ascb->scb;
+
+	if (unlikely(task->ata_task.device_control_reg_update))
+		scb->header.opcode = CONTROL_ATA_DEV;
+	else if (dev->sata_dev.class == ATA_DEV_ATAPI)
+		scb->header.opcode = INITIATE_ATAPI_TASK;
+	else
+		scb->header.opcode = INITIATE_ATA_TASK;
+
+	scb->ata_task.proto_conn_rate = (1 << 5); /* STP */
+	if (dev->port->oob_mode == SAS_OOB_MODE)
+		scb->ata_task.proto_conn_rate |= dev->linkrate;
+
+	scb->ata_task.total_xfer_len = cpu_to_le32(task->total_xfer_len);
+	scb->ata_task.fis = task->ata_task.fis;
+	if (likely(!task->ata_task.device_control_reg_update))
+		scb->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */
+	scb->ata_task.fis.flags &= 0xF0; /* PM_PORT field shall be 0 */
+	if (dev->sata_dev.class == ATA_DEV_ATAPI)
+		memcpy(scb->ata_task.atapi_packet, task->ata_task.atapi_packet,
+		       16);
+	scb->ata_task.sister_scb = cpu_to_le16(0xFFFF);
+	scb->ata_task.conn_handle = cpu_to_le16(
+		(u16)(unsigned long)dev->lldd_dev);
+
+	if (likely(!task->ata_task.device_control_reg_update)) {
+		flags = 0;
+		if (task->ata_task.dma_xfer)
+			flags |= DATA_XFER_MODE_DMA;
+		if (task->ata_task.use_ncq &&
+		    dev->sata_dev.class != ATA_DEV_ATAPI)
+			flags |= ATA_Q_TYPE_NCQ;
+		flags |= data_dir_flags[task->data_dir];
+		scb->ata_task.ata_flags = flags;
+
+		scb->ata_task.retry_count = task->ata_task.retry_count;
+
+		flags = 0;
+		if (task->ata_task.set_affil_pol)
+			flags |= SET_AFFIL_POLICY;
+		if (task->ata_task.stp_affil_pol)
+			flags |= STP_AFFIL_POLICY;
+		scb->ata_task.flags = flags;
+	}
+	ascb->tasklet_complete = asd_task_tasklet_complete;
+
+	if (likely(!task->ata_task.device_control_reg_update))
+		res = asd_map_scatterlist(task, scb->ata_task.sg_element,
+					  gfp_flags);
+
+	return res;
+}
+
+static void asd_unbuild_ata_ascb(struct asd_ascb *a)
+{
+	asd_unmap_scatterlist(a);
+}
+
+/* ---------- SMP ---------- */
+
+static int asd_build_smp_ascb(struct asd_ascb *ascb, struct sas_task *task,
+			      gfp_t gfp_flags)
+{
+	struct asd_ha_struct *asd_ha = ascb->ha;
+	struct domain_device *dev = task->dev;
+	struct scb *scb;
+
+	dma_map_sg(&asd_ha->pcidev->dev, &task->smp_task.smp_req, 1,
+		   DMA_TO_DEVICE);
+	dma_map_sg(&asd_ha->pcidev->dev, &task->smp_task.smp_resp, 1,
+		   DMA_FROM_DEVICE);
+
+	scb = ascb->scb;
+
+	scb->header.opcode = INITIATE_SMP_TASK;
+
+	scb->smp_task.proto_conn_rate = dev->linkrate;
+
+	scb->smp_task.smp_req.bus_addr =
+		cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_req));
+	scb->smp_task.smp_req.size =
+		cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_req)-4);
+
+	scb->smp_task.smp_resp.bus_addr =
+		cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_resp));
+	scb->smp_task.smp_resp.size =
+		cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_resp)-4);
+
+	scb->smp_task.sister_scb = cpu_to_le16(0xFFFF);
+	scb->smp_task.conn_handle = cpu_to_le16((u16)
+						(unsigned long)dev->lldd_dev);
+
+	ascb->tasklet_complete = asd_task_tasklet_complete;
+
+	return 0;
+}
+
+static void asd_unbuild_smp_ascb(struct asd_ascb *a)
+{
+	struct sas_task *task = a->uldd_task;
+
+	BUG_ON(!task);
+	dma_unmap_sg(&a->ha->pcidev->dev, &task->smp_task.smp_req, 1,
+		     DMA_TO_DEVICE);
+	dma_unmap_sg(&a->ha->pcidev->dev, &task->smp_task.smp_resp, 1,
+		     DMA_FROM_DEVICE);
+}
+
+/* ---------- SSP ---------- */
+
+static int asd_build_ssp_ascb(struct asd_ascb *ascb, struct sas_task *task,
+			      gfp_t gfp_flags)
+{
+	struct domain_device *dev = task->dev;
+	struct scb *scb;
+	int    res = 0;
+
+	scb = ascb->scb;
+
+	scb->header.opcode = INITIATE_SSP_TASK;
+
+	scb->ssp_task.proto_conn_rate  = (1 << 4); /* SSP */
+	scb->ssp_task.proto_conn_rate |= dev->linkrate;
+	scb->ssp_task.total_xfer_len = cpu_to_le32(task->total_xfer_len);
+	scb->ssp_task.ssp_frame.frame_type = SSP_DATA;
+	memcpy(scb->ssp_task.ssp_frame.hashed_dest_addr, dev->hashed_sas_addr,
+	       HASHED_SAS_ADDR_SIZE);
+	memcpy(scb->ssp_task.ssp_frame.hashed_src_addr,
+	       dev->port->ha->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
+	scb->ssp_task.ssp_frame.tptt = cpu_to_be16(0xFFFF);
+
+	memcpy(scb->ssp_task.ssp_cmd.lun, task->ssp_task.LUN, 8);
+	if (task->ssp_task.enable_first_burst)
+		scb->ssp_task.ssp_cmd.efb_prio_attr |= EFB_MASK;
+	scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_prio << 3);
+	scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_attr & 7);
+	memcpy(scb->ssp_task.ssp_cmd.cdb, task->ssp_task.cmd->cmnd,
+	       task->ssp_task.cmd->cmd_len);
+
+	scb->ssp_task.sister_scb = cpu_to_le16(0xFFFF);
+	scb->ssp_task.conn_handle = cpu_to_le16(
+		(u16)(unsigned long)dev->lldd_dev);
+	scb->ssp_task.data_dir = data_dir_flags[task->data_dir];
+	scb->ssp_task.retry_count = scb->ssp_task.retry_count;
+
+	ascb->tasklet_complete = asd_task_tasklet_complete;
+
+	res = asd_map_scatterlist(task, scb->ssp_task.sg_element, gfp_flags);
+
+	return res;
+}
+
+static void asd_unbuild_ssp_ascb(struct asd_ascb *a)
+{
+	asd_unmap_scatterlist(a);
+}
+
+/* ---------- Execute Task ---------- */
+
+static int asd_can_queue(struct asd_ha_struct *asd_ha, int num)
+{
+	int res = 0;
+	unsigned long flags;
+
+	spin_lock_irqsave(&asd_ha->seq.pend_q_lock, flags);
+	if ((asd_ha->seq.can_queue - num) < 0)
+		res = -SAS_QUEUE_FULL;
+	else
+		asd_ha->seq.can_queue -= num;
+	spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags);
+
+	return res;
+}
+
+int asd_execute_task(struct sas_task *task, gfp_t gfp_flags)
+{
+	int res = 0;
+	LIST_HEAD(alist);
+	struct sas_task *t = task;
+	struct asd_ascb *ascb = NULL, *a;
+	struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha;
+
+	res = asd_can_queue(asd_ha, 1);
+	if (res)
+		return res;
+
+	res = 1;
+	ascb = asd_ascb_alloc_list(asd_ha, &res, gfp_flags);
+	if (res) {
+		res = -ENOMEM;
+		goto out_err;
+	}
+
+	__list_add(&alist, ascb->list.prev, &ascb->list);
+	list_for_each_entry(a, &alist, list) {
+		a->uldd_task = t;
+		t->lldd_task = a;
+		break;
+	}
+	list_for_each_entry(a, &alist, list) {
+		t = a->uldd_task;
+		a->uldd_timer = 1;
+		if (t->task_proto & SAS_PROTOCOL_STP)
+			t->task_proto = SAS_PROTOCOL_STP;
+		switch (t->task_proto) {
+		case SAS_PROTOCOL_SATA:
+		case SAS_PROTOCOL_STP:
+			res = asd_build_ata_ascb(a, t, gfp_flags);
+			break;
+		case SAS_PROTOCOL_SMP:
+			res = asd_build_smp_ascb(a, t, gfp_flags);
+			break;
+		case SAS_PROTOCOL_SSP:
+			res = asd_build_ssp_ascb(a, t, gfp_flags);
+			break;
+		default:
+			asd_printk("unknown sas_task proto: 0x%x\n",
+				   t->task_proto);
+			res = -ENOMEM;
+			break;
+		}
+		if (res)
+			goto out_err_unmap;
+	}
+	list_del_init(&alist);
+
+	res = asd_post_ascb_list(asd_ha, ascb, 1);
+	if (unlikely(res)) {
+		a = NULL;
+		__list_add(&alist, ascb->list.prev, &ascb->list);
+		goto out_err_unmap;
+	}
+
+	return 0;
+out_err_unmap:
+	{
+		struct asd_ascb *b = a;
+		list_for_each_entry(a, &alist, list) {
+			if (a == b)
+				break;
+			t = a->uldd_task;
+			switch (t->task_proto) {
+			case SAS_PROTOCOL_SATA:
+			case SAS_PROTOCOL_STP:
+				asd_unbuild_ata_ascb(a);
+				break;
+			case SAS_PROTOCOL_SMP:
+				asd_unbuild_smp_ascb(a);
+				break;
+			case SAS_PROTOCOL_SSP:
+				asd_unbuild_ssp_ascb(a);
+				break;
+			default:
+				break;
+			}
+			t->lldd_task = NULL;
+		}
+	}
+	list_del_init(&alist);
+out_err:
+	if (ascb)
+		asd_ascb_free_list(ascb);
+	asd_can_dequeue(asd_ha, 1);
+	return res;
+}