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, 496 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_inline.h b/drivers/scsi/qla2xxx/qla_inline.h
new file mode 100644
index 000000000..5185dc5da
--- /dev/null
+++ b/drivers/scsi/qla2xxx/qla_inline.h
@@ -0,0 +1,496 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * QLogic Fibre Channel HBA Driver
+ * Copyright (c)  2003-2014 QLogic Corporation
+ */
+
+#include "qla_target.h"
+/**
+ * qla24xx_calc_iocbs() - Determine number of Command Type 3 and
+ * Continuation Type 1 IOCBs to allocate.
+ *
+ * @vha: HA context
+ * @dsds: number of data segment descriptors needed
+ *
+ * Returns the number of IOCB entries needed to store @dsds.
+ */
+static inline uint16_t
+qla24xx_calc_iocbs(scsi_qla_host_t *vha, uint16_t dsds)
+{
+	uint16_t iocbs;
+
+	iocbs = 1;
+	if (dsds > 1) {
+		iocbs += (dsds - 1) / 5;
+		if ((dsds - 1) % 5)
+			iocbs++;
+	}
+	return iocbs;
+}
+
+/*
+ * qla2x00_debounce_register
+ *      Debounce register.
+ *
+ * Input:
+ *      port = register address.
+ *
+ * Returns:
+ *      register value.
+ */
+static __inline__ uint16_t
+qla2x00_debounce_register(volatile __le16 __iomem *addr)
+{
+	volatile uint16_t first;
+	volatile uint16_t second;
+
+	do {
+		first = rd_reg_word(addr);
+		barrier();
+		cpu_relax();
+		second = rd_reg_word(addr);
+	} while (first != second);
+
+	return (first);
+}
+
+static inline void
+qla2x00_poll(struct rsp_que *rsp)
+{
+	struct qla_hw_data *ha = rsp->hw;
+
+	if (IS_P3P_TYPE(ha))
+		qla82xx_poll(0, rsp);
+	else
+		ha->isp_ops->intr_handler(0, rsp);
+}
+
+static inline uint8_t *
+host_to_fcp_swap(uint8_t *fcp, uint32_t bsize)
+{
+       uint32_t *ifcp = (uint32_t *) fcp;
+       uint32_t *ofcp = (uint32_t *) fcp;
+       uint32_t iter = bsize >> 2;
+
+       for (; iter ; iter--)
+               *ofcp++ = swab32(*ifcp++);
+
+       return fcp;
+}
+
+static inline void
+host_to_adap(uint8_t *src, uint8_t *dst, uint32_t bsize)
+{
+	uint32_t *isrc = (uint32_t *) src;
+	__le32 *odest = (__le32 *) dst;
+	uint32_t iter = bsize >> 2;
+
+	for ( ; iter--; isrc++)
+		*odest++ = cpu_to_le32(*isrc);
+}
+
+static inline void
+qla2x00_clean_dsd_pool(struct qla_hw_data *ha, struct crc_context *ctx)
+{
+	struct dsd_dma *dsd, *tdsd;
+
+	/* clean up allocated prev pool */
+	list_for_each_entry_safe(dsd, tdsd, &ctx->dsd_list, list) {
+		dma_pool_free(ha->dl_dma_pool, dsd->dsd_addr,
+		    dsd->dsd_list_dma);
+		list_del(&dsd->list);
+		kfree(dsd);
+	}
+	INIT_LIST_HEAD(&ctx->dsd_list);
+}
+
+static inline void
+qla2x00_set_fcport_disc_state(fc_port_t *fcport, int state)
+{
+	int old_val;
+	uint8_t shiftbits, mask;
+
+	/* This will have to change when the max no. of states > 16 */
+	shiftbits = 4;
+	mask = (1 << shiftbits) - 1;
+
+	fcport->disc_state = state;
+	while (1) {
+		old_val = atomic_read(&fcport->shadow_disc_state);
+		if (old_val == atomic_cmpxchg(&fcport->shadow_disc_state,
+		    old_val, (old_val << shiftbits) | state)) {
+			ql_dbg(ql_dbg_disc, fcport->vha, 0x2134,
+			    "FCPort %8phC disc_state transition: %s to %s - portid=%06x.\n",
+			    fcport->port_name, port_dstate_str[old_val & mask],
+			    port_dstate_str[state], fcport->d_id.b24);
+			return;
+		}
+	}
+}
+
+static inline int
+qla2x00_hba_err_chk_enabled(srb_t *sp)
+{
+	/*
+	 * Uncomment when corresponding SCSI changes are done.
+	 *
+	if (!sp->cmd->prot_chk)
+		return 0;
+	 *
+	 */
+	switch (scsi_get_prot_op(GET_CMD_SP(sp))) {
+	case SCSI_PROT_READ_STRIP:
+	case SCSI_PROT_WRITE_INSERT:
+		if (ql2xenablehba_err_chk >= 1)
+			return 1;
+		break;
+	case SCSI_PROT_READ_PASS:
+	case SCSI_PROT_WRITE_PASS:
+		if (ql2xenablehba_err_chk >= 2)
+			return 1;
+		break;
+	case SCSI_PROT_READ_INSERT:
+	case SCSI_PROT_WRITE_STRIP:
+		return 1;
+	}
+	return 0;
+}
+
+static inline int
+qla2x00_reset_active(scsi_qla_host_t *vha)
+{
+	scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
+
+	/* Test appropriate base-vha and vha flags. */
+	return test_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags) ||
+	    test_bit(ABORT_ISP_ACTIVE, &base_vha->dpc_flags) ||
+	    test_bit(ISP_ABORT_RETRY, &base_vha->dpc_flags) ||
+	    test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags) ||
+	    test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags);
+}
+
+static inline int
+qla2x00_chip_is_down(scsi_qla_host_t *vha)
+{
+	return (qla2x00_reset_active(vha) || !vha->hw->flags.fw_started);
+}
+
+static void qla2xxx_init_sp(srb_t *sp, scsi_qla_host_t *vha,
+			    struct qla_qpair *qpair, fc_port_t *fcport)
+{
+	memset(sp, 0, sizeof(*sp));
+	sp->fcport = fcport;
+	sp->iocbs = 1;
+	sp->vha = vha;
+	sp->qpair = qpair;
+	sp->cmd_type = TYPE_SRB;
+	/* ref : INIT - normal flow */
+	kref_init(&sp->cmd_kref);
+	INIT_LIST_HEAD(&sp->elem);
+}
+
+static inline srb_t *
+qla2xxx_get_qpair_sp(scsi_qla_host_t *vha, struct qla_qpair *qpair,
+    fc_port_t *fcport, gfp_t flag)
+{
+	srb_t *sp = NULL;
+	uint8_t bail;
+
+	QLA_QPAIR_MARK_BUSY(qpair, bail);
+	if (unlikely(bail))
+		return NULL;
+
+	sp = mempool_alloc(qpair->srb_mempool, flag);
+	if (sp)
+		qla2xxx_init_sp(sp, vha, qpair, fcport);
+	else
+		QLA_QPAIR_MARK_NOT_BUSY(qpair);
+	return sp;
+}
+
+void qla2xxx_rel_done_warning(srb_t *sp, int res);
+void qla2xxx_rel_free_warning(srb_t *sp);
+
+static inline void
+qla2xxx_rel_qpair_sp(struct qla_qpair *qpair, srb_t *sp)
+{
+	sp->qpair = NULL;
+	sp->done = qla2xxx_rel_done_warning;
+	sp->free = qla2xxx_rel_free_warning;
+	mempool_free(sp, qpair->srb_mempool);
+	QLA_QPAIR_MARK_NOT_BUSY(qpair);
+}
+
+static inline srb_t *
+qla2x00_get_sp(scsi_qla_host_t *vha, fc_port_t *fcport, gfp_t flag)
+{
+	srb_t *sp = NULL;
+	struct qla_qpair *qpair;
+
+	if (unlikely(qla_vha_mark_busy(vha)))
+		return NULL;
+
+	qpair = vha->hw->base_qpair;
+	sp = qla2xxx_get_qpair_sp(vha, qpair, fcport, flag);
+	if (!sp)
+		goto done;
+
+	sp->vha = vha;
+done:
+	if (!sp)
+		QLA_VHA_MARK_NOT_BUSY(vha);
+	return sp;
+}
+
+static inline void
+qla2x00_rel_sp(srb_t *sp)
+{
+	QLA_VHA_MARK_NOT_BUSY(sp->vha);
+	qla2xxx_rel_qpair_sp(sp->qpair, sp);
+}
+
+static inline int
+qla2x00_gid_list_size(struct qla_hw_data *ha)
+{
+	if (IS_QLAFX00(ha))
+		return sizeof(uint32_t) * 32;
+	else
+		return sizeof(struct gid_list_info) * ha->max_fibre_devices;
+}
+
+static inline void
+qla2x00_handle_mbx_completion(struct qla_hw_data *ha, int status)
+{
+	if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
+	    (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
+		set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
+		clear_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags);
+		complete(&ha->mbx_intr_comp);
+	}
+}
+
+static inline void
+qla2x00_set_retry_delay_timestamp(fc_port_t *fcport, uint16_t sts_qual)
+{
+	u8 scope;
+	u16 qual;
+#define SQ_SCOPE_MASK		0xc000 /* SAM-6 rev5 5.3.2 */
+#define SQ_SCOPE_SHIFT		14
+#define SQ_QUAL_MASK		0x3fff
+
+#define SQ_MAX_WAIT_SEC		60 /* Max I/O hold off time in seconds. */
+#define SQ_MAX_WAIT_TIME	(SQ_MAX_WAIT_SEC * 10) /* in 100ms. */
+
+	if (!sts_qual) /* Common case. */
+		return;
+
+	scope = (sts_qual & SQ_SCOPE_MASK) >> SQ_SCOPE_SHIFT;
+	/* Handle only scope 1 or 2, which is for I-T nexus. */
+	if (scope != 1 && scope != 2)
+		return;
+
+	/* Skip processing, if retry delay timer is already in effect. */
+	if (fcport->retry_delay_timestamp &&
+	    time_before(jiffies, fcport->retry_delay_timestamp))
+		return;
+
+	qual = sts_qual & SQ_QUAL_MASK;
+	if (qual < 1 || qual > 0x3fef)
+		return;
+	qual = min(qual, (u16)SQ_MAX_WAIT_TIME);
+
+	/* qual is expressed in 100ms increments. */
+	fcport->retry_delay_timestamp = jiffies + (qual * HZ / 10);
+
+	ql_log(ql_log_warn, fcport->vha, 0x5101,
+	       "%8phC: I/O throttling requested (status qualifier = %04xh), holding off I/Os for %ums.\n",
+	       fcport->port_name, sts_qual, qual * 100);
+}
+
+static inline bool
+qla_is_exch_offld_enabled(struct scsi_qla_host *vha)
+{
+	if (qla_ini_mode_enabled(vha) &&
+	    (vha->ql2xiniexchg > FW_DEF_EXCHANGES_CNT))
+		return true;
+	else if (qla_tgt_mode_enabled(vha) &&
+	    (vha->ql2xexchoffld > FW_DEF_EXCHANGES_CNT))
+		return true;
+	else if (qla_dual_mode_enabled(vha) &&
+	    ((vha->ql2xiniexchg + vha->ql2xexchoffld) > FW_DEF_EXCHANGES_CNT))
+		return true;
+	else
+		return false;
+}
+
+static inline void
+qla_cpu_update(struct qla_qpair *qpair, uint16_t cpuid)
+{
+	qpair->cpuid = cpuid;
+
+	if (!list_empty(&qpair->hints_list)) {
+		struct qla_qpair_hint *h;
+
+		list_for_each_entry(h, &qpair->hints_list, hint_elem)
+			h->cpuid = qpair->cpuid;
+	}
+}
+
+static inline struct qla_qpair_hint *
+qla_qpair_to_hint(struct qla_tgt *tgt, struct qla_qpair *qpair)
+{
+	struct qla_qpair_hint *h;
+	u16 i;
+
+	for (i = 0; i < tgt->ha->max_qpairs + 1; i++) {
+		h = &tgt->qphints[i];
+		if (h->qpair == qpair)
+			return h;
+	}
+
+	return NULL;
+}
+
+static inline void
+qla_83xx_start_iocbs(struct qla_qpair *qpair)
+{
+	struct req_que *req = qpair->req;
+
+	req->ring_index++;
+	if (req->ring_index == req->length) {
+		req->ring_index = 0;
+		req->ring_ptr = req->ring;
+	} else
+		req->ring_ptr++;
+
+	wrt_reg_dword(req->req_q_in, req->ring_index);
+}
+
+static inline int
+qla2xxx_get_fc4_priority(struct scsi_qla_host *vha)
+{
+	uint32_t data;
+
+	data =
+	    ((uint8_t *)vha->hw->nvram)[NVRAM_DUAL_FCP_NVME_FLAG_OFFSET];
+
+
+	return (data >> 6) & BIT_0 ? FC4_PRIORITY_FCP : FC4_PRIORITY_NVME;
+}
+
+enum {
+	RESOURCE_NONE,
+	RESOURCE_INI,
+};
+
+static inline int
+qla_get_iocbs(struct qla_qpair *qp, struct iocb_resource *iores)
+{
+	u16 iocbs_used, i;
+	struct qla_hw_data *ha = qp->vha->hw;
+
+	if (!ql2xenforce_iocb_limit) {
+		iores->res_type = RESOURCE_NONE;
+		return 0;
+	}
+
+	if ((iores->iocb_cnt + qp->fwres.iocbs_used) < qp->fwres.iocbs_qp_limit) {
+		qp->fwres.iocbs_used += iores->iocb_cnt;
+		return 0;
+	} else {
+		/* no need to acquire qpair lock. It's just rough calculation */
+		iocbs_used = ha->base_qpair->fwres.iocbs_used;
+		for (i = 0; i < ha->max_qpairs; i++) {
+			if (ha->queue_pair_map[i])
+				iocbs_used += ha->queue_pair_map[i]->fwres.iocbs_used;
+		}
+
+		if ((iores->iocb_cnt + iocbs_used) < qp->fwres.iocbs_limit) {
+			qp->fwres.iocbs_used += iores->iocb_cnt;
+			return 0;
+		} else {
+			iores->res_type = RESOURCE_NONE;
+			return -ENOSPC;
+		}
+	}
+}
+
+static inline void
+qla_put_iocbs(struct qla_qpair *qp, struct iocb_resource *iores)
+{
+	switch (iores->res_type) {
+	case RESOURCE_NONE:
+		break;
+	default:
+		if (qp->fwres.iocbs_used >= iores->iocb_cnt) {
+			qp->fwres.iocbs_used -= iores->iocb_cnt;
+		} else {
+			// should not happen
+			qp->fwres.iocbs_used = 0;
+		}
+		break;
+	}
+	iores->res_type = RESOURCE_NONE;
+}
+
+#define ISP_REG_DISCONNECT 0xffffffffU
+/**************************************************************************
+ * qla2x00_isp_reg_stat
+ *
+ * Description:
+ *        Read the host status register of ISP before aborting the command.
+ *
+ * Input:
+ *       ha = pointer to host adapter structure.
+ *
+ *
+ * Returns:
+ *       Either true or false.
+ *
+ * Note: Return true if there is register disconnect.
+ **************************************************************************/
+static inline
+uint32_t qla2x00_isp_reg_stat(struct qla_hw_data *ha)
+{
+	struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
+	struct device_reg_82xx __iomem *reg82 = &ha->iobase->isp82;
+
+	if (IS_P3P_TYPE(ha))
+		return ((rd_reg_dword(&reg82->host_int)) == ISP_REG_DISCONNECT);
+	else
+		return ((rd_reg_dword(&reg->host_status)) ==
+			ISP_REG_DISCONNECT);
+}
+
+static inline
+bool qla_pci_disconnected(struct scsi_qla_host *vha,
+			  struct device_reg_24xx __iomem *reg)
+{
+	uint32_t stat;
+	bool ret = false;
+
+	stat = rd_reg_dword(&reg->host_status);
+	if (stat == 0xffffffff) {
+		ql_log(ql_log_info, vha, 0x8041,
+		       "detected PCI disconnect.\n");
+		qla_schedule_eeh_work(vha);
+		ret = true;
+	}
+	return ret;
+}
+
+static inline bool
+fcport_is_smaller(fc_port_t *fcport)
+{
+	if (wwn_to_u64(fcport->port_name) <
+		wwn_to_u64(fcport->vha->port_name))
+		return true;
+	else
+		return false;
+}
+
+static inline bool
+fcport_is_bigger(fc_port_t *fcport)
+{
+	return !fcport_is_smaller(fcport);
+}