Merge tag 'net-next-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Jakub Kicinski:

 - Add redirect_neigh() BPF packet redirect helper, allowing to limit
   stack traversal in common container configs and improving TCP
   back-pressure.

   Daniel reports ~10Gbps => ~15Gbps single stream TCP performance gain.

 - Expand netlink policy support and improve policy export to user
   space. (Ge)netlink core performs request validation according to
   declared policies. Expand the expressiveness of those policies
   (min/max length and bitmasks). Allow dumping policies for particular
   commands. This is used for feature discovery by user space (instead
   of kernel version parsing or trial and error).

 - Support IGMPv3/MLDv2 multicast listener discovery protocols in
   bridge.

 - Allow more than 255 IPv4 multicast interfaces.

 - Add support for Type of Service (ToS) reflection in SYN/SYN-ACK
   packets of TCPv6.

 - In Multi-patch TCP (MPTCP) support concurrent transmission of data on
   multiple subflows in a load balancing scenario. Enhance advertising
   addresses via the RM_ADDR/ADD_ADDR options.

 - Support SMC-Dv2 version of SMC, which enables multi-subnet
   deployments.

 - Allow more calls to same peer in RxRPC.

 - Support two new Controller Area Network (CAN) protocols - CAN-FD and
   ISO 15765-2:2016.

 - Add xfrm/IPsec compat layer, solving the 32bit user space on 64bit
   kernel problem.

 - Add TC actions for implementing MPLS L2 VPNs.

 - Improve nexthop code - e.g. handle various corner cases when nexthop
   objects are removed from groups better, skip unnecessary
   notifications and make it easier to offload nexthops into HW by
   converting to a blocking notifier.

 - Support adding and consuming TCP header options by BPF programs,
   opening the doors for easy experimental and deployment-specific TCP
   option use.

 - Reorganize TCP congestion control (CC) initialization to simplify
   life of TCP CC implemented in BPF.

 - Add support for shipping BPF programs with the kernel and loading
   them early on boot via the User Mode Driver mechanism, hence reusing
   all the user space infra we have.

 - Support sleepable BPF programs, initially targeting LSM and tracing.

 - Add bpf_d_path() helper for returning full path for given 'struct
   path'.

 - Make bpf_tail_call compatible with bpf-to-bpf calls.

 - Allow BPF programs to call map_update_elem on sockmaps.

 - Add BPF Type Format (BTF) support for type and enum discovery, as
   well as support for using BTF within the kernel itself (current use
   is for pretty printing structures).

 - Support listing and getting information about bpf_links via the bpf
   syscall.

 - Enhance kernel interfaces around NIC firmware update. Allow
   specifying overwrite mask to control if settings etc. are reset
   during update; report expected max time operation may take to users;
   support firmware activation without machine reboot incl. limits of
   how much impact reset may have (e.g. dropping link or not).

 - Extend ethtool configuration interface to report IEEE-standard
   counters, to limit the need for per-vendor logic in user space.

 - Adopt or extend devlink use for debug, monitoring, fw update in many
   drivers (dsa loop, ice, ionic, sja1105, qed, mlxsw, mv88e6xxx,
   dpaa2-eth).

 - In mlxsw expose critical and emergency SFP module temperature alarms.
   Refactor port buffer handling to make the defaults more suitable and
   support setting these values explicitly via the DCBNL interface.

 - Add XDP support for Intel's igb driver.

 - Support offloading TC flower classification and filtering rules to
   mscc_ocelot switches.

 - Add PTP support for Marvell Octeontx2 and PP2.2 hardware, as well as
   fixed interval period pulse generator and one-step timestamping in
   dpaa-eth.

 - Add support for various auth offloads in WiFi APs, e.g. SAE (WPA3)
   offload.

 - Add Lynx PHY/PCS MDIO module, and convert various drivers which have
   this HW to use it. Convert mvpp2 to split PCS.

 - Support Marvell Prestera 98DX3255 24-port switch ASICs, as well as
   7-port Mediatek MT7531 IP.

 - Add initial support for QCA6390 and IPQ6018 in ath11k WiFi driver,
   and wcn3680 support in wcn36xx.

 - Improve performance for packets which don't require much offloads on
   recent Mellanox NICs by 20% by making multiple packets share a
   descriptor entry.

 - Move chelsio inline crypto drivers (for TLS and IPsec) from the
   crypto subtree to drivers/net. Move MDIO drivers out of the phy
   directory.

 - Clean up a lot of W=1 warnings, reportedly the actively developed
   subsections of networking drivers should now build W=1 warning free.

 - Make sure drivers don't use in_interrupt() to dynamically adapt their
   code. Convert tasklets to use new tasklet_setup API (sadly this
   conversion is not yet complete).

* tag 'net-next-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2583 commits)
  Revert "bpfilter: Fix build error with CONFIG_BPFILTER_UMH"
  net, sockmap: Don't call bpf_prog_put() on NULL pointer
  bpf, selftest: Fix flaky tcp_hdr_options test when adding addr to lo
  bpf, sockmap: Add locking annotations to iterator
  netfilter: nftables: allow re-computing sctp CRC-32C in 'payload' statements
  net: fix pos incrementment in ipv6_route_seq_next
  net/smc: fix invalid return code in smcd_new_buf_create()
  net/smc: fix valid DMBE buffer sizes
  net/smc: fix use-after-free of delayed events
  bpfilter: Fix build error with CONFIG_BPFILTER_UMH
  cxgb4/ch_ipsec: Replace the module name to ch_ipsec from chcr
  net: sched: Fix suspicious RCU usage while accessing tcf_tunnel_info
  bpf: Fix register equivalence tracking.
  rxrpc: Fix loss of final ack on shutdown
  rxrpc: Fix bundle counting for exclusive connections
  netfilter: restore NF_INET_NUMHOOKS
  ibmveth: Identify ingress large send packets.
  ibmveth: Switch order of ibmveth_helper calls.
  cxgb4: handle 4-tuple PEDIT to NAT mode translation
  selftests: Add VRF route leaking tests
  ...

1 files changed, 467 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath11k/mhi.c b/drivers/net/wireless/ath/ath11k/mhi.c
new file mode 100644
index 000000000000..aded9a719d51
--- /dev/null
+++ b/drivers/net/wireless/ath/ath11k/mhi.c
@@ -0,0 +1,467 @@
+// SPDX-License-Identifier: BSD-3-Clause-Clear
+/* Copyright (c) 2020 The Linux Foundation. All rights reserved. */
+
+#include <linux/msi.h>
+#include <linux/pci.h>
+
+#include "core.h"
+#include "debug.h"
+#include "mhi.h"
+
+#define MHI_TIMEOUT_DEFAULT_MS	90000
+
+static struct mhi_channel_config ath11k_mhi_channels[] = {
+	{
+		.num = 0,
+		.name = "LOOPBACK",
+		.num_elements = 32,
+		.event_ring = 0,
+		.dir = DMA_TO_DEVICE,
+		.ee_mask = 0x4,
+		.pollcfg = 0,
+		.doorbell = MHI_DB_BRST_DISABLE,
+		.lpm_notify = false,
+		.offload_channel = false,
+		.doorbell_mode_switch = false,
+		.auto_queue = false,
+		.auto_start = false,
+	},
+	{
+		.num = 1,
+		.name = "LOOPBACK",
+		.num_elements = 32,
+		.event_ring = 0,
+		.dir = DMA_FROM_DEVICE,
+		.ee_mask = 0x4,
+		.pollcfg = 0,
+		.doorbell = MHI_DB_BRST_DISABLE,
+		.lpm_notify = false,
+		.offload_channel = false,
+		.doorbell_mode_switch = false,
+		.auto_queue = false,
+		.auto_start = false,
+	},
+	{
+		.num = 20,
+		.name = "IPCR",
+		.num_elements = 64,
+		.event_ring = 1,
+		.dir = DMA_TO_DEVICE,
+		.ee_mask = 0x4,
+		.pollcfg = 0,
+		.doorbell = MHI_DB_BRST_DISABLE,
+		.lpm_notify = false,
+		.offload_channel = false,
+		.doorbell_mode_switch = false,
+		.auto_queue = false,
+		.auto_start = true,
+	},
+	{
+		.num = 21,
+		.name = "IPCR",
+		.num_elements = 64,
+		.event_ring = 1,
+		.dir = DMA_FROM_DEVICE,
+		.ee_mask = 0x4,
+		.pollcfg = 0,
+		.doorbell = MHI_DB_BRST_DISABLE,
+		.lpm_notify = false,
+		.offload_channel = false,
+		.doorbell_mode_switch = false,
+		.auto_queue = true,
+		.auto_start = true,
+	},
+};
+
+static struct mhi_event_config ath11k_mhi_events[] = {
+	{
+		.num_elements = 32,
+		.irq_moderation_ms = 0,
+		.irq = 1,
+		.mode = MHI_DB_BRST_DISABLE,
+		.data_type = MHI_ER_CTRL,
+		.hardware_event = false,
+		.client_managed = false,
+		.offload_channel = false,
+	},
+	{
+		.num_elements = 256,
+		.irq_moderation_ms = 1,
+		.irq = 2,
+		.mode = MHI_DB_BRST_DISABLE,
+		.priority = 1,
+		.hardware_event = false,
+		.client_managed = false,
+		.offload_channel = false,
+	},
+};
+
+static struct mhi_controller_config ath11k_mhi_config = {
+	.max_channels = 128,
+	.timeout_ms = 2000,
+	.use_bounce_buf = false,
+	.buf_len = 0,
+	.num_channels = ARRAY_SIZE(ath11k_mhi_channels),
+	.ch_cfg = ath11k_mhi_channels,
+	.num_events = ARRAY_SIZE(ath11k_mhi_events),
+	.event_cfg = ath11k_mhi_events,
+};
+
+void ath11k_mhi_set_mhictrl_reset(struct ath11k_base *ab)
+{
+	u32 val;
+
+	val = ath11k_pci_read32(ab, MHISTATUS);
+
+	ath11k_dbg(ab, ATH11K_DBG_PCI, "MHISTATUS 0x%x\n", val);
+
+	/* Observed on QCA6390 that after SOC_GLOBAL_RESET, MHISTATUS
+	 * has SYSERR bit set and thus need to set MHICTRL_RESET
+	 * to clear SYSERR.
+	 */
+	ath11k_pci_write32(ab, MHICTRL, MHICTRL_RESET_MASK);
+
+	mdelay(10);
+}
+
+static void ath11k_mhi_reset_txvecdb(struct ath11k_base *ab)
+{
+	ath11k_pci_write32(ab, PCIE_TXVECDB, 0);
+}
+
+static void ath11k_mhi_reset_txvecstatus(struct ath11k_base *ab)
+{
+	ath11k_pci_write32(ab, PCIE_TXVECSTATUS, 0);
+}
+
+static void ath11k_mhi_reset_rxvecdb(struct ath11k_base *ab)
+{
+	ath11k_pci_write32(ab, PCIE_RXVECDB, 0);
+}
+
+static void ath11k_mhi_reset_rxvecstatus(struct ath11k_base *ab)
+{
+	ath11k_pci_write32(ab, PCIE_RXVECSTATUS, 0);
+}
+
+void ath11k_mhi_clear_vector(struct ath11k_base *ab)
+{
+	ath11k_mhi_reset_txvecdb(ab);
+	ath11k_mhi_reset_txvecstatus(ab);
+	ath11k_mhi_reset_rxvecdb(ab);
+	ath11k_mhi_reset_rxvecstatus(ab);
+}
+
+static int ath11k_mhi_get_msi(struct ath11k_pci *ab_pci)
+{
+	struct ath11k_base *ab = ab_pci->ab;
+	u32 user_base_data, base_vector;
+	int ret, num_vectors, i;
+	int *irq;
+
+	ret = ath11k_pci_get_user_msi_assignment(ab_pci,
+						 "MHI", &num_vectors,
+						 &user_base_data, &base_vector);
+	if (ret)
+		return ret;
+
+	ath11k_dbg(ab, ATH11K_DBG_PCI, "Number of assigned MSI for MHI is %d, base vector is %d\n",
+		   num_vectors, base_vector);
+
+	irq = kcalloc(num_vectors, sizeof(int), GFP_KERNEL);
+	if (!irq)
+		return -ENOMEM;
+
+	for (i = 0; i < num_vectors; i++)
+		irq[i] = ath11k_pci_get_msi_irq(ab->dev,
+						base_vector + i);
+
+	ab_pci->mhi_ctrl->irq = irq;
+	ab_pci->mhi_ctrl->nr_irqs = num_vectors;
+
+	return 0;
+}
+
+static int ath11k_mhi_op_runtime_get(struct mhi_controller *mhi_cntrl)
+{
+	return 0;
+}
+
+static void ath11k_mhi_op_runtime_put(struct mhi_controller *mhi_cntrl)
+{
+}
+
+static void ath11k_mhi_op_status_cb(struct mhi_controller *mhi_cntrl,
+				    enum mhi_callback cb)
+{
+}
+
+static int ath11k_mhi_op_read_reg(struct mhi_controller *mhi_cntrl,
+				  void __iomem *addr,
+				  u32 *out)
+{
+	*out = readl(addr);
+
+	return 0;
+}
+
+static void ath11k_mhi_op_write_reg(struct mhi_controller *mhi_cntrl,
+				    void __iomem *addr,
+				    u32 val)
+{
+	writel(val, addr);
+}
+
+int ath11k_mhi_register(struct ath11k_pci *ab_pci)
+{
+	struct ath11k_base *ab = ab_pci->ab;
+	struct mhi_controller *mhi_ctrl;
+	int ret;
+
+	mhi_ctrl = kzalloc(sizeof(*mhi_ctrl), GFP_KERNEL);
+	if (!mhi_ctrl)
+		return -ENOMEM;
+
+	ath11k_core_create_firmware_path(ab, ATH11K_AMSS_FILE,
+					 ab_pci->amss_path,
+					 sizeof(ab_pci->amss_path));
+
+	ab_pci->mhi_ctrl = mhi_ctrl;
+	mhi_ctrl->cntrl_dev = ab->dev;
+	mhi_ctrl->fw_image = ab_pci->amss_path;
+	mhi_ctrl->regs = ab->mem;
+
+	ret = ath11k_mhi_get_msi(ab_pci);
+	if (ret) {
+		ath11k_err(ab, "failed to get msi for mhi\n");
+		kfree(mhi_ctrl);
+		return ret;
+	}
+
+	mhi_ctrl->iova_start = 0;
+	mhi_ctrl->iova_stop = 0xffffffff;
+	mhi_ctrl->sbl_size = SZ_512K;
+	mhi_ctrl->seg_len = SZ_512K;
+	mhi_ctrl->fbc_download = true;
+	mhi_ctrl->runtime_get = ath11k_mhi_op_runtime_get;
+	mhi_ctrl->runtime_put = ath11k_mhi_op_runtime_put;
+	mhi_ctrl->status_cb = ath11k_mhi_op_status_cb;
+	mhi_ctrl->read_reg = ath11k_mhi_op_read_reg;
+	mhi_ctrl->write_reg = ath11k_mhi_op_write_reg;
+
+	ret = mhi_register_controller(mhi_ctrl, &ath11k_mhi_config);
+	if (ret) {
+		ath11k_err(ab, "failed to register to mhi bus, err = %d\n", ret);
+		kfree(mhi_ctrl);
+		return ret;
+	}
+
+	return 0;
+}
+
+void ath11k_mhi_unregister(struct ath11k_pci *ab_pci)
+{
+	struct mhi_controller *mhi_ctrl = ab_pci->mhi_ctrl;
+
+	mhi_unregister_controller(mhi_ctrl);
+	kfree(mhi_ctrl->irq);
+}
+
+static char *ath11k_mhi_state_to_str(enum ath11k_mhi_state mhi_state)
+{
+	switch (mhi_state) {
+	case ATH11K_MHI_INIT:
+		return "INIT";
+	case ATH11K_MHI_DEINIT:
+		return "DEINIT";
+	case ATH11K_MHI_POWER_ON:
+		return "POWER_ON";
+	case ATH11K_MHI_POWER_OFF:
+		return "POWER_OFF";
+	case ATH11K_MHI_FORCE_POWER_OFF:
+		return "FORCE_POWER_OFF";
+	case ATH11K_MHI_SUSPEND:
+		return "SUSPEND";
+	case ATH11K_MHI_RESUME:
+		return "RESUME";
+	case ATH11K_MHI_TRIGGER_RDDM:
+		return "TRIGGER_RDDM";
+	case ATH11K_MHI_RDDM_DONE:
+		return "RDDM_DONE";
+	default:
+		return "UNKNOWN";
+	}
+};
+
+static void ath11k_mhi_set_state_bit(struct ath11k_pci *ab_pci,
+				     enum ath11k_mhi_state mhi_state)
+{
+	struct ath11k_base *ab = ab_pci->ab;
+
+	switch (mhi_state) {
+	case ATH11K_MHI_INIT:
+		set_bit(ATH11K_MHI_INIT, &ab_pci->mhi_state);
+		break;
+	case ATH11K_MHI_DEINIT:
+		clear_bit(ATH11K_MHI_INIT, &ab_pci->mhi_state);
+		break;
+	case ATH11K_MHI_POWER_ON:
+		set_bit(ATH11K_MHI_POWER_ON, &ab_pci->mhi_state);
+		break;
+	case ATH11K_MHI_POWER_OFF:
+	case ATH11K_MHI_FORCE_POWER_OFF:
+		clear_bit(ATH11K_MHI_POWER_ON, &ab_pci->mhi_state);
+		clear_bit(ATH11K_MHI_TRIGGER_RDDM, &ab_pci->mhi_state);
+		clear_bit(ATH11K_MHI_RDDM_DONE, &ab_pci->mhi_state);
+		break;
+	case ATH11K_MHI_SUSPEND:
+		set_bit(ATH11K_MHI_SUSPEND, &ab_pci->mhi_state);
+		break;
+	case ATH11K_MHI_RESUME:
+		clear_bit(ATH11K_MHI_SUSPEND, &ab_pci->mhi_state);
+		break;
+	case ATH11K_MHI_TRIGGER_RDDM:
+		set_bit(ATH11K_MHI_TRIGGER_RDDM, &ab_pci->mhi_state);
+		break;
+	case ATH11K_MHI_RDDM_DONE:
+		set_bit(ATH11K_MHI_RDDM_DONE, &ab_pci->mhi_state);
+		break;
+	default:
+		ath11k_err(ab, "unhandled mhi state (%d)\n", mhi_state);
+	}
+}
+
+static int ath11k_mhi_check_state_bit(struct ath11k_pci *ab_pci,
+				      enum ath11k_mhi_state mhi_state)
+{
+	struct ath11k_base *ab = ab_pci->ab;
+
+	switch (mhi_state) {
+	case ATH11K_MHI_INIT:
+		if (!test_bit(ATH11K_MHI_INIT, &ab_pci->mhi_state))
+			return 0;
+		break;
+	case ATH11K_MHI_DEINIT:
+	case ATH11K_MHI_POWER_ON:
+		if (test_bit(ATH11K_MHI_INIT, &ab_pci->mhi_state) &&
+		    !test_bit(ATH11K_MHI_POWER_ON, &ab_pci->mhi_state))
+			return 0;
+		break;
+	case ATH11K_MHI_FORCE_POWER_OFF:
+		if (test_bit(ATH11K_MHI_POWER_ON, &ab_pci->mhi_state))
+			return 0;
+		break;
+	case ATH11K_MHI_POWER_OFF:
+	case ATH11K_MHI_SUSPEND:
+		if (test_bit(ATH11K_MHI_POWER_ON, &ab_pci->mhi_state) &&
+		    !test_bit(ATH11K_MHI_SUSPEND, &ab_pci->mhi_state))
+			return 0;
+		break;
+	case ATH11K_MHI_RESUME:
+		if (test_bit(ATH11K_MHI_SUSPEND, &ab_pci->mhi_state))
+			return 0;
+		break;
+	case ATH11K_MHI_TRIGGER_RDDM:
+		if (test_bit(ATH11K_MHI_POWER_ON, &ab_pci->mhi_state) &&
+		    !test_bit(ATH11K_MHI_TRIGGER_RDDM, &ab_pci->mhi_state))
+			return 0;
+		break;
+	case ATH11K_MHI_RDDM_DONE:
+		return 0;
+	default:
+		ath11k_err(ab, "unhandled mhi state: %s(%d)\n",
+			   ath11k_mhi_state_to_str(mhi_state), mhi_state);
+	}
+
+	ath11k_err(ab, "failed to set mhi state %s(%d) in current mhi state (0x%lx)\n",
+		   ath11k_mhi_state_to_str(mhi_state), mhi_state,
+		   ab_pci->mhi_state);
+
+	return -EINVAL;
+}
+
+static int ath11k_mhi_set_state(struct ath11k_pci *ab_pci,
+				enum ath11k_mhi_state mhi_state)
+{
+	struct ath11k_base *ab = ab_pci->ab;
+	int ret;
+
+	ret = ath11k_mhi_check_state_bit(ab_pci, mhi_state);
+	if (ret)
+		goto out;
+
+	ath11k_dbg(ab, ATH11K_DBG_PCI, "setting mhi state: %s(%d)\n",
+		   ath11k_mhi_state_to_str(mhi_state), mhi_state);
+
+	switch (mhi_state) {
+	case ATH11K_MHI_INIT:
+		ret = mhi_prepare_for_power_up(ab_pci->mhi_ctrl);
+		break;
+	case ATH11K_MHI_DEINIT:
+		mhi_unprepare_after_power_down(ab_pci->mhi_ctrl);
+		ret = 0;
+		break;
+	case ATH11K_MHI_POWER_ON:
+		ret = mhi_async_power_up(ab_pci->mhi_ctrl);
+		break;
+	case ATH11K_MHI_POWER_OFF:
+		mhi_power_down(ab_pci->mhi_ctrl, true);
+		ret = 0;
+		break;
+	case ATH11K_MHI_FORCE_POWER_OFF:
+		mhi_power_down(ab_pci->mhi_ctrl, false);
+		ret = 0;
+		break;
+	case ATH11K_MHI_SUSPEND:
+		break;
+	case ATH11K_MHI_RESUME:
+		break;
+	case ATH11K_MHI_TRIGGER_RDDM:
+		ret = mhi_force_rddm_mode(ab_pci->mhi_ctrl);
+		break;
+	case ATH11K_MHI_RDDM_DONE:
+		break;
+	default:
+		ath11k_err(ab, "unhandled MHI state (%d)\n", mhi_state);
+		ret = -EINVAL;
+	}
+
+	if (ret)
+		goto out;
+
+	ath11k_mhi_set_state_bit(ab_pci, mhi_state);
+
+	return 0;
+
+out:
+	ath11k_err(ab, "failed to set mhi state: %s(%d)\n",
+		   ath11k_mhi_state_to_str(mhi_state), mhi_state);
+	return ret;
+}
+
+int ath11k_mhi_start(struct ath11k_pci *ab_pci)
+{
+	int ret;
+
+	ab_pci->mhi_ctrl->timeout_ms = MHI_TIMEOUT_DEFAULT_MS;
+
+	ret = ath11k_mhi_set_state(ab_pci, ATH11K_MHI_INIT);
+	if (ret)
+		goto out;
+
+	ret = ath11k_mhi_set_state(ab_pci, ATH11K_MHI_POWER_ON);
+	if (ret)
+		goto out;
+
+	return 0;
+
+out:
+	return ret;
+}
+
+void ath11k_mhi_stop(struct ath11k_pci *ab_pci)
+{
+	ath11k_mhi_set_state(ab_pci, ATH11K_MHI_POWER_OFF);
+	ath11k_mhi_set_state(ab_pci, ATH11K_MHI_DEINIT);
+}
+