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, 330 insertions, 0 deletions

diff --git a/drivers/target/iscsi/cxgbit/cxgbit_ddp.c b/drivers/target/iscsi/cxgbit/cxgbit_ddp.c
new file mode 100644
index 000000000..17fd0d8cc
--- /dev/null
+++ b/drivers/target/iscsi/cxgbit/cxgbit_ddp.c
@@ -0,0 +1,330 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2016 Chelsio Communications, Inc.
+ */
+
+#include "cxgbit.h"
+
+static void
+cxgbit_set_one_ppod(struct cxgbi_pagepod *ppod,
+		    struct cxgbi_task_tag_info *ttinfo,
+		    struct scatterlist **sg_pp, unsigned int *sg_off)
+{
+	struct scatterlist *sg = sg_pp ? *sg_pp : NULL;
+	unsigned int offset = sg_off ? *sg_off : 0;
+	dma_addr_t addr = 0UL;
+	unsigned int len = 0;
+	int i;
+
+	memcpy(ppod, &ttinfo->hdr, sizeof(struct cxgbi_pagepod_hdr));
+
+	if (sg) {
+		addr = sg_dma_address(sg);
+		len = sg_dma_len(sg);
+	}
+
+	for (i = 0; i < PPOD_PAGES_MAX; i++) {
+		if (sg) {
+			ppod->addr[i] = cpu_to_be64(addr + offset);
+			offset += PAGE_SIZE;
+			if (offset == (len + sg->offset)) {
+				offset = 0;
+				sg = sg_next(sg);
+				if (sg) {
+					addr = sg_dma_address(sg);
+					len = sg_dma_len(sg);
+				}
+			}
+		} else {
+			ppod->addr[i] = 0ULL;
+		}
+	}
+
+	/*
+	 * the fifth address needs to be repeated in the next ppod, so do
+	 * not move sg
+	 */
+	if (sg_pp) {
+		*sg_pp = sg;
+		*sg_off = offset;
+	}
+
+	if (offset == len) {
+		offset = 0;
+		if (sg) {
+			sg = sg_next(sg);
+			if (sg)
+				addr = sg_dma_address(sg);
+		}
+	}
+	ppod->addr[i] = sg ? cpu_to_be64(addr + offset) : 0ULL;
+}
+
+static struct sk_buff *
+cxgbit_ppod_init_idata(struct cxgbit_device *cdev, struct cxgbi_ppm *ppm,
+		       unsigned int idx, unsigned int npods, unsigned int tid)
+{
+	struct ulp_mem_io *req;
+	struct ulptx_idata *idata;
+	unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit;
+	unsigned int dlen = npods << PPOD_SIZE_SHIFT;
+	unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
+				sizeof(struct ulptx_idata) + dlen, 16);
+	struct sk_buff *skb;
+
+	skb  = alloc_skb(wr_len, GFP_KERNEL);
+	if (!skb)
+		return NULL;
+
+	req = __skb_put(skb, wr_len);
+	INIT_ULPTX_WR(req, wr_len, 0, tid);
+	req->wr.wr_hi = htonl(FW_WR_OP_V(FW_ULPTX_WR) |
+		FW_WR_ATOMIC_V(0));
+	req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) |
+		ULP_MEMIO_ORDER_V(0) |
+		T5_ULP_MEMIO_IMM_V(1));
+	req->dlen = htonl(ULP_MEMIO_DATA_LEN_V(dlen >> 5));
+	req->lock_addr = htonl(ULP_MEMIO_ADDR_V(pm_addr >> 5));
+	req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
+
+	idata = (struct ulptx_idata *)(req + 1);
+	idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM));
+	idata->len = htonl(dlen);
+
+	return skb;
+}
+
+static int
+cxgbit_ppod_write_idata(struct cxgbi_ppm *ppm, struct cxgbit_sock *csk,
+			struct cxgbi_task_tag_info *ttinfo, unsigned int idx,
+			unsigned int npods, struct scatterlist **sg_pp,
+			unsigned int *sg_off)
+{
+	struct cxgbit_device *cdev = csk->com.cdev;
+	struct sk_buff *skb;
+	struct ulp_mem_io *req;
+	struct ulptx_idata *idata;
+	struct cxgbi_pagepod *ppod;
+	unsigned int i;
+
+	skb = cxgbit_ppod_init_idata(cdev, ppm, idx, npods, csk->tid);
+	if (!skb)
+		return -ENOMEM;
+
+	req = (struct ulp_mem_io *)skb->data;
+	idata = (struct ulptx_idata *)(req + 1);
+	ppod = (struct cxgbi_pagepod *)(idata + 1);
+
+	for (i = 0; i < npods; i++, ppod++)
+		cxgbit_set_one_ppod(ppod, ttinfo, sg_pp, sg_off);
+
+	__skb_queue_tail(&csk->ppodq, skb);
+
+	return 0;
+}
+
+static int
+cxgbit_ddp_set_map(struct cxgbi_ppm *ppm, struct cxgbit_sock *csk,
+		   struct cxgbi_task_tag_info *ttinfo)
+{
+	unsigned int pidx = ttinfo->idx;
+	unsigned int npods = ttinfo->npods;
+	unsigned int i, cnt;
+	struct scatterlist *sg = ttinfo->sgl;
+	unsigned int offset = 0;
+	int ret = 0;
+
+	for (i = 0; i < npods; i += cnt, pidx += cnt) {
+		cnt = npods - i;
+
+		if (cnt > ULPMEM_IDATA_MAX_NPPODS)
+			cnt = ULPMEM_IDATA_MAX_NPPODS;
+
+		ret = cxgbit_ppod_write_idata(ppm, csk, ttinfo, pidx, cnt,
+					      &sg, &offset);
+		if (ret < 0)
+			break;
+	}
+
+	return ret;
+}
+
+static int cxgbit_ddp_sgl_check(struct scatterlist *sg,
+				unsigned int nents)
+{
+	unsigned int last_sgidx = nents - 1;
+	unsigned int i;
+
+	for (i = 0; i < nents; i++, sg = sg_next(sg)) {
+		unsigned int len = sg->length + sg->offset;
+
+		if ((sg->offset & 0x3) || (i && sg->offset) ||
+		    ((i != last_sgidx) && (len != PAGE_SIZE))) {
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+static int
+cxgbit_ddp_reserve(struct cxgbit_sock *csk, struct cxgbi_task_tag_info *ttinfo,
+		   unsigned int xferlen)
+{
+	struct cxgbit_device *cdev = csk->com.cdev;
+	struct cxgbi_ppm *ppm = cdev2ppm(cdev);
+	struct scatterlist *sgl = ttinfo->sgl;
+	unsigned int sgcnt = ttinfo->nents;
+	unsigned int sg_offset = sgl->offset;
+	int ret;
+
+	if ((xferlen < DDP_THRESHOLD) || (!sgcnt)) {
+		pr_debug("ppm 0x%p, pgidx %u, xfer %u, sgcnt %u, NO ddp.\n",
+			 ppm, ppm->tformat.pgsz_idx_dflt,
+			 xferlen, ttinfo->nents);
+		return -EINVAL;
+	}
+
+	if (cxgbit_ddp_sgl_check(sgl, sgcnt) < 0)
+		return -EINVAL;
+
+	ttinfo->nr_pages = (xferlen + sgl->offset +
+			    (1 << PAGE_SHIFT) - 1) >> PAGE_SHIFT;
+
+	/*
+	 * the ddp tag will be used for the ttt in the outgoing r2t pdu
+	 */
+	ret = cxgbi_ppm_ppods_reserve(ppm, ttinfo->nr_pages, 0, &ttinfo->idx,
+				      &ttinfo->tag, 0);
+	if (ret < 0)
+		return ret;
+	ttinfo->npods = ret;
+
+	sgl->offset = 0;
+	ret = dma_map_sg(&ppm->pdev->dev, sgl, sgcnt, DMA_FROM_DEVICE);
+	sgl->offset = sg_offset;
+	if (!ret) {
+		pr_debug("%s: 0x%x, xfer %u, sgl %u dma mapping err.\n",
+			 __func__, 0, xferlen, sgcnt);
+		goto rel_ppods;
+	}
+
+	cxgbi_ppm_make_ppod_hdr(ppm, ttinfo->tag, csk->tid, sgl->offset,
+				xferlen, &ttinfo->hdr);
+
+	ret = cxgbit_ddp_set_map(ppm, csk, ttinfo);
+	if (ret < 0) {
+		__skb_queue_purge(&csk->ppodq);
+		dma_unmap_sg(&ppm->pdev->dev, sgl, sgcnt, DMA_FROM_DEVICE);
+		goto rel_ppods;
+	}
+
+	return 0;
+
+rel_ppods:
+	cxgbi_ppm_ppod_release(ppm, ttinfo->idx);
+	return -EINVAL;
+}
+
+void
+cxgbit_get_r2t_ttt(struct iscsit_conn *conn, struct iscsit_cmd *cmd,
+		   struct iscsi_r2t *r2t)
+{
+	struct cxgbit_sock *csk = conn->context;
+	struct cxgbit_device *cdev = csk->com.cdev;
+	struct cxgbit_cmd *ccmd = iscsit_priv_cmd(cmd);
+	struct cxgbi_task_tag_info *ttinfo = &ccmd->ttinfo;
+	int ret;
+
+	if ((!ccmd->setup_ddp) ||
+	    (!test_bit(CSK_DDP_ENABLE, &csk->com.flags)))
+		goto out;
+
+	ccmd->setup_ddp = false;
+
+	ttinfo->sgl = cmd->se_cmd.t_data_sg;
+	ttinfo->nents = cmd->se_cmd.t_data_nents;
+
+	ret = cxgbit_ddp_reserve(csk, ttinfo, cmd->se_cmd.data_length);
+	if (ret < 0) {
+		pr_debug("csk 0x%p, cmd 0x%p, xfer len %u, sgcnt %u no ddp.\n",
+			 csk, cmd, cmd->se_cmd.data_length, ttinfo->nents);
+
+		ttinfo->sgl = NULL;
+		ttinfo->nents = 0;
+	} else {
+		ccmd->release = true;
+	}
+out:
+	pr_debug("cdev 0x%p, cmd 0x%p, tag 0x%x\n", cdev, cmd, ttinfo->tag);
+	r2t->targ_xfer_tag = ttinfo->tag;
+}
+
+void cxgbit_unmap_cmd(struct iscsit_conn *conn, struct iscsit_cmd *cmd)
+{
+	struct cxgbit_cmd *ccmd = iscsit_priv_cmd(cmd);
+
+	if (ccmd->release) {
+		if (cmd->se_cmd.se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) {
+			put_page(sg_page(&ccmd->sg));
+		} else {
+			struct cxgbit_sock *csk = conn->context;
+			struct cxgbit_device *cdev = csk->com.cdev;
+			struct cxgbi_ppm *ppm = cdev2ppm(cdev);
+			struct cxgbi_task_tag_info *ttinfo = &ccmd->ttinfo;
+
+			/* Abort the TCP conn if DDP is not complete to
+			 * avoid any possibility of DDP after freeing
+			 * the cmd.
+			 */
+			if (unlikely(cmd->write_data_done !=
+				     cmd->se_cmd.data_length))
+				cxgbit_abort_conn(csk);
+
+			if (unlikely(ttinfo->sgl)) {
+				dma_unmap_sg(&ppm->pdev->dev, ttinfo->sgl,
+					     ttinfo->nents, DMA_FROM_DEVICE);
+				ttinfo->nents = 0;
+				ttinfo->sgl = NULL;
+			}
+			cxgbi_ppm_ppod_release(ppm, ttinfo->idx);
+		}
+		ccmd->release = false;
+	}
+}
+
+int cxgbit_ddp_init(struct cxgbit_device *cdev)
+{
+	struct cxgb4_lld_info *lldi = &cdev->lldi;
+	struct net_device *ndev = cdev->lldi.ports[0];
+	struct cxgbi_tag_format tformat;
+	int ret, i;
+
+	if (!lldi->vr->iscsi.size) {
+		pr_warn("%s, iscsi NOT enabled, check config!\n", ndev->name);
+		return -EACCES;
+	}
+
+	memset(&tformat, 0, sizeof(struct cxgbi_tag_format));
+	for (i = 0; i < 4; i++)
+		tformat.pgsz_order[i] = (lldi->iscsi_pgsz_order >> (i << 3))
+					 & 0xF;
+	cxgbi_tagmask_check(lldi->iscsi_tagmask, &tformat);
+
+	ret = cxgbi_ppm_init(lldi->iscsi_ppm, cdev->lldi.ports[0],
+			     cdev->lldi.pdev, &cdev->lldi, &tformat,
+			     lldi->vr->iscsi.size, lldi->iscsi_llimit,
+			     lldi->vr->iscsi.start, 2,
+			     lldi->vr->ppod_edram.start,
+			     lldi->vr->ppod_edram.size);
+	if (ret >= 0) {
+		struct cxgbi_ppm *ppm = (struct cxgbi_ppm *)(*lldi->iscsi_ppm);
+
+		if ((ppm->tformat.pgsz_idx_dflt < DDP_PGIDX_MAX) &&
+		    (ppm->ppmax >= 1024))
+			set_bit(CDEV_DDP_ENABLE, &cdev->flags);
+		ret = 0;
+	}
+
+	return ret;
+}