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, 693 insertions, 0 deletions

diff --git a/drivers/gpu/drm/tegra/submit.c b/drivers/gpu/drm/tegra/submit.c
new file mode 100644
index 000000000..066f88564
--- /dev/null
+++ b/drivers/gpu/drm/tegra/submit.c
@@ -0,0 +1,693 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright (c) 2020 NVIDIA Corporation */
+
+#include <linux/dma-fence-array.h>
+#include <linux/dma-mapping.h>
+#include <linux/file.h>
+#include <linux/host1x.h>
+#include <linux/iommu.h>
+#include <linux/kref.h>
+#include <linux/list.h>
+#include <linux/nospec.h>
+#include <linux/pm_runtime.h>
+#include <linux/scatterlist.h>
+#include <linux/slab.h>
+#include <linux/sync_file.h>
+
+#include <drm/drm_drv.h>
+#include <drm/drm_file.h>
+#include <drm/drm_syncobj.h>
+
+#include "drm.h"
+#include "gem.h"
+#include "submit.h"
+#include "uapi.h"
+
+#define SUBMIT_ERR(context, fmt, ...) \
+	dev_err_ratelimited(context->client->base.dev, \
+		"%s: job submission failed: " fmt "\n", \
+		current->comm, ##__VA_ARGS__)
+
+struct gather_bo {
+	struct host1x_bo base;
+
+	struct kref ref;
+
+	struct device *dev;
+	u32 *gather_data;
+	dma_addr_t gather_data_dma;
+	size_t gather_data_words;
+};
+
+static struct host1x_bo *gather_bo_get(struct host1x_bo *host_bo)
+{
+	struct gather_bo *bo = container_of(host_bo, struct gather_bo, base);
+
+	kref_get(&bo->ref);
+
+	return host_bo;
+}
+
+static void gather_bo_release(struct kref *ref)
+{
+	struct gather_bo *bo = container_of(ref, struct gather_bo, ref);
+
+	dma_free_attrs(bo->dev, bo->gather_data_words * 4, bo->gather_data, bo->gather_data_dma,
+		       0);
+	kfree(bo);
+}
+
+static void gather_bo_put(struct host1x_bo *host_bo)
+{
+	struct gather_bo *bo = container_of(host_bo, struct gather_bo, base);
+
+	kref_put(&bo->ref, gather_bo_release);
+}
+
+static struct host1x_bo_mapping *
+gather_bo_pin(struct device *dev, struct host1x_bo *bo, enum dma_data_direction direction)
+{
+	struct gather_bo *gather = container_of(bo, struct gather_bo, base);
+	struct host1x_bo_mapping *map;
+	int err;
+
+	map = kzalloc(sizeof(*map), GFP_KERNEL);
+	if (!map)
+		return ERR_PTR(-ENOMEM);
+
+	kref_init(&map->ref);
+	map->bo = host1x_bo_get(bo);
+	map->direction = direction;
+	map->dev = dev;
+
+	map->sgt = kzalloc(sizeof(*map->sgt), GFP_KERNEL);
+	if (!map->sgt) {
+		err = -ENOMEM;
+		goto free;
+	}
+
+	err = dma_get_sgtable(gather->dev, map->sgt, gather->gather_data, gather->gather_data_dma,
+			      gather->gather_data_words * 4);
+	if (err)
+		goto free_sgt;
+
+	err = dma_map_sgtable(dev, map->sgt, direction, 0);
+	if (err)
+		goto free_sgt;
+
+	map->phys = sg_dma_address(map->sgt->sgl);
+	map->size = gather->gather_data_words * 4;
+	map->chunks = err;
+
+	return map;
+
+free_sgt:
+	sg_free_table(map->sgt);
+	kfree(map->sgt);
+free:
+	kfree(map);
+	return ERR_PTR(err);
+}
+
+static void gather_bo_unpin(struct host1x_bo_mapping *map)
+{
+	if (!map)
+		return;
+
+	dma_unmap_sgtable(map->dev, map->sgt, map->direction, 0);
+	sg_free_table(map->sgt);
+	kfree(map->sgt);
+	host1x_bo_put(map->bo);
+
+	kfree(map);
+}
+
+static void *gather_bo_mmap(struct host1x_bo *host_bo)
+{
+	struct gather_bo *bo = container_of(host_bo, struct gather_bo, base);
+
+	return bo->gather_data;
+}
+
+static void gather_bo_munmap(struct host1x_bo *host_bo, void *addr)
+{
+}
+
+static const struct host1x_bo_ops gather_bo_ops = {
+	.get = gather_bo_get,
+	.put = gather_bo_put,
+	.pin = gather_bo_pin,
+	.unpin = gather_bo_unpin,
+	.mmap = gather_bo_mmap,
+	.munmap = gather_bo_munmap,
+};
+
+static struct tegra_drm_mapping *
+tegra_drm_mapping_get(struct tegra_drm_context *context, u32 id)
+{
+	struct tegra_drm_mapping *mapping;
+
+	xa_lock(&context->mappings);
+
+	mapping = xa_load(&context->mappings, id);
+	if (mapping)
+		kref_get(&mapping->ref);
+
+	xa_unlock(&context->mappings);
+
+	return mapping;
+}
+
+static void *alloc_copy_user_array(void __user *from, size_t count, size_t size)
+{
+	size_t copy_len;
+	void *data;
+
+	if (check_mul_overflow(count, size, &copy_len))
+		return ERR_PTR(-EINVAL);
+
+	if (copy_len > 0x4000)
+		return ERR_PTR(-E2BIG);
+
+	data = vmemdup_user(from, copy_len);
+	if (IS_ERR(data))
+		return ERR_CAST(data);
+
+	return data;
+}
+
+static int submit_copy_gather_data(struct gather_bo **pbo, struct device *dev,
+				   struct tegra_drm_context *context,
+				   struct drm_tegra_channel_submit *args)
+{
+	struct gather_bo *bo;
+	size_t copy_len;
+
+	if (args->gather_data_words == 0) {
+		SUBMIT_ERR(context, "gather_data_words cannot be zero");
+		return -EINVAL;
+	}
+
+	if (check_mul_overflow((size_t)args->gather_data_words, (size_t)4, &copy_len)) {
+		SUBMIT_ERR(context, "gather_data_words is too large");
+		return -EINVAL;
+	}
+
+	bo = kzalloc(sizeof(*bo), GFP_KERNEL);
+	if (!bo) {
+		SUBMIT_ERR(context, "failed to allocate memory for bo info");
+		return -ENOMEM;
+	}
+
+	host1x_bo_init(&bo->base, &gather_bo_ops);
+	kref_init(&bo->ref);
+	bo->dev = dev;
+
+	bo->gather_data = dma_alloc_attrs(dev, copy_len, &bo->gather_data_dma,
+					  GFP_KERNEL | __GFP_NOWARN, 0);
+	if (!bo->gather_data) {
+		SUBMIT_ERR(context, "failed to allocate memory for gather data");
+		kfree(bo);
+		return -ENOMEM;
+	}
+
+	if (copy_from_user(bo->gather_data, u64_to_user_ptr(args->gather_data_ptr), copy_len)) {
+		SUBMIT_ERR(context, "failed to copy gather data from userspace");
+		dma_free_attrs(dev, copy_len, bo->gather_data, bo->gather_data_dma, 0);
+		kfree(bo);
+		return -EFAULT;
+	}
+
+	bo->gather_data_words = args->gather_data_words;
+
+	*pbo = bo;
+
+	return 0;
+}
+
+static int submit_write_reloc(struct tegra_drm_context *context, struct gather_bo *bo,
+			      struct drm_tegra_submit_buf *buf, struct tegra_drm_mapping *mapping)
+{
+	/* TODO check that target_offset is within bounds */
+	dma_addr_t iova = mapping->iova + buf->reloc.target_offset;
+	u32 written_ptr;
+
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+	if (buf->flags & DRM_TEGRA_SUBMIT_RELOC_SECTOR_LAYOUT)
+		iova |= BIT_ULL(39);
+#endif
+
+	written_ptr = iova >> buf->reloc.shift;
+
+	if (buf->reloc.gather_offset_words >= bo->gather_data_words) {
+		SUBMIT_ERR(context,
+			   "relocation has too large gather offset (%u vs gather length %zu)",
+			   buf->reloc.gather_offset_words, bo->gather_data_words);
+		return -EINVAL;
+	}
+
+	buf->reloc.gather_offset_words = array_index_nospec(buf->reloc.gather_offset_words,
+							    bo->gather_data_words);
+
+	bo->gather_data[buf->reloc.gather_offset_words] = written_ptr;
+
+	return 0;
+}
+
+static int submit_process_bufs(struct tegra_drm_context *context, struct gather_bo *bo,
+			       struct drm_tegra_channel_submit *args,
+			       struct tegra_drm_submit_data *job_data)
+{
+	struct tegra_drm_used_mapping *mappings;
+	struct drm_tegra_submit_buf *bufs;
+	int err;
+	u32 i;
+
+	bufs = alloc_copy_user_array(u64_to_user_ptr(args->bufs_ptr), args->num_bufs,
+				     sizeof(*bufs));
+	if (IS_ERR(bufs)) {
+		SUBMIT_ERR(context, "failed to copy bufs array from userspace");
+		return PTR_ERR(bufs);
+	}
+
+	mappings = kcalloc(args->num_bufs, sizeof(*mappings), GFP_KERNEL);
+	if (!mappings) {
+		SUBMIT_ERR(context, "failed to allocate memory for mapping info");
+		err = -ENOMEM;
+		goto done;
+	}
+
+	for (i = 0; i < args->num_bufs; i++) {
+		struct drm_tegra_submit_buf *buf = &bufs[i];
+		struct tegra_drm_mapping *mapping;
+
+		if (buf->flags & ~DRM_TEGRA_SUBMIT_RELOC_SECTOR_LAYOUT) {
+			SUBMIT_ERR(context, "invalid flag specified for buffer");
+			err = -EINVAL;
+			goto drop_refs;
+		}
+
+		mapping = tegra_drm_mapping_get(context, buf->mapping);
+		if (!mapping) {
+			SUBMIT_ERR(context, "invalid mapping ID '%u' for buffer", buf->mapping);
+			err = -EINVAL;
+			goto drop_refs;
+		}
+
+		err = submit_write_reloc(context, bo, buf, mapping);
+		if (err) {
+			tegra_drm_mapping_put(mapping);
+			goto drop_refs;
+		}
+
+		mappings[i].mapping = mapping;
+		mappings[i].flags = buf->flags;
+	}
+
+	job_data->used_mappings = mappings;
+	job_data->num_used_mappings = i;
+
+	err = 0;
+
+	goto done;
+
+drop_refs:
+	while (i--)
+		tegra_drm_mapping_put(mappings[i].mapping);
+
+	kfree(mappings);
+	job_data->used_mappings = NULL;
+
+done:
+	kvfree(bufs);
+
+	return err;
+}
+
+static int submit_get_syncpt(struct tegra_drm_context *context, struct host1x_job *job,
+			     struct xarray *syncpoints, struct drm_tegra_channel_submit *args)
+{
+	struct host1x_syncpt *sp;
+
+	if (args->syncpt.flags) {
+		SUBMIT_ERR(context, "invalid flag specified for syncpt");
+		return -EINVAL;
+	}
+
+	/* Syncpt ref will be dropped on job release */
+	sp = xa_load(syncpoints, args->syncpt.id);
+	if (!sp) {
+		SUBMIT_ERR(context, "syncpoint specified in syncpt was not allocated");
+		return -EINVAL;
+	}
+
+	job->syncpt = host1x_syncpt_get(sp);
+	job->syncpt_incrs = args->syncpt.increments;
+
+	return 0;
+}
+
+static int submit_job_add_gather(struct host1x_job *job, struct tegra_drm_context *context,
+				 struct drm_tegra_submit_cmd_gather_uptr *cmd,
+				 struct gather_bo *bo, u32 *offset,
+				 struct tegra_drm_submit_data *job_data,
+				 u32 *class)
+{
+	u32 next_offset;
+
+	if (cmd->reserved[0] || cmd->reserved[1] || cmd->reserved[2]) {
+		SUBMIT_ERR(context, "non-zero reserved field in GATHER_UPTR command");
+		return -EINVAL;
+	}
+
+	/* Check for maximum gather size */
+	if (cmd->words > 16383) {
+		SUBMIT_ERR(context, "too many words in GATHER_UPTR command");
+		return -EINVAL;
+	}
+
+	if (check_add_overflow(*offset, cmd->words, &next_offset)) {
+		SUBMIT_ERR(context, "too many total words in job");
+		return -EINVAL;
+	}
+
+	if (next_offset > bo->gather_data_words) {
+		SUBMIT_ERR(context, "GATHER_UPTR command overflows gather data");
+		return -EINVAL;
+	}
+
+	if (tegra_drm_fw_validate(context->client, bo->gather_data, *offset,
+				  cmd->words, job_data, class)) {
+		SUBMIT_ERR(context, "job was rejected by firewall");
+		return -EINVAL;
+	}
+
+	host1x_job_add_gather(job, &bo->base, cmd->words, *offset * 4);
+
+	*offset = next_offset;
+
+	return 0;
+}
+
+static struct host1x_job *
+submit_create_job(struct tegra_drm_context *context, struct gather_bo *bo,
+		  struct drm_tegra_channel_submit *args, struct tegra_drm_submit_data *job_data,
+		  struct xarray *syncpoints)
+{
+	struct drm_tegra_submit_cmd *cmds;
+	u32 i, gather_offset = 0, class;
+	struct host1x_job *job;
+	int err;
+
+	/* Set initial class for firewall. */
+	class = context->client->base.class;
+
+	cmds = alloc_copy_user_array(u64_to_user_ptr(args->cmds_ptr), args->num_cmds,
+				     sizeof(*cmds));
+	if (IS_ERR(cmds)) {
+		SUBMIT_ERR(context, "failed to copy cmds array from userspace");
+		return ERR_CAST(cmds);
+	}
+
+	job = host1x_job_alloc(context->channel, args->num_cmds, 0, true);
+	if (!job) {
+		SUBMIT_ERR(context, "failed to allocate memory for job");
+		job = ERR_PTR(-ENOMEM);
+		goto done;
+	}
+
+	err = submit_get_syncpt(context, job, syncpoints, args);
+	if (err < 0)
+		goto free_job;
+
+	job->client = &context->client->base;
+	job->class = context->client->base.class;
+	job->serialize = true;
+
+	for (i = 0; i < args->num_cmds; i++) {
+		struct drm_tegra_submit_cmd *cmd = &cmds[i];
+
+		if (cmd->flags) {
+			SUBMIT_ERR(context, "unknown flags given for cmd");
+			err = -EINVAL;
+			goto free_job;
+		}
+
+		if (cmd->type == DRM_TEGRA_SUBMIT_CMD_GATHER_UPTR) {
+			err = submit_job_add_gather(job, context, &cmd->gather_uptr, bo,
+						    &gather_offset, job_data, &class);
+			if (err)
+				goto free_job;
+		} else if (cmd->type == DRM_TEGRA_SUBMIT_CMD_WAIT_SYNCPT) {
+			if (cmd->wait_syncpt.reserved[0] || cmd->wait_syncpt.reserved[1]) {
+				SUBMIT_ERR(context, "non-zero reserved value");
+				err = -EINVAL;
+				goto free_job;
+			}
+
+			host1x_job_add_wait(job, cmd->wait_syncpt.id, cmd->wait_syncpt.value,
+					    false, class);
+		} else if (cmd->type == DRM_TEGRA_SUBMIT_CMD_WAIT_SYNCPT_RELATIVE) {
+			if (cmd->wait_syncpt.reserved[0] || cmd->wait_syncpt.reserved[1]) {
+				SUBMIT_ERR(context, "non-zero reserved value");
+				err = -EINVAL;
+				goto free_job;
+			}
+
+			if (cmd->wait_syncpt.id != args->syncpt.id) {
+				SUBMIT_ERR(context, "syncpoint ID in CMD_WAIT_SYNCPT_RELATIVE is not used by the job");
+				err = -EINVAL;
+				goto free_job;
+			}
+
+			host1x_job_add_wait(job, cmd->wait_syncpt.id, cmd->wait_syncpt.value,
+					    true, class);
+		} else {
+			SUBMIT_ERR(context, "unknown cmd type");
+			err = -EINVAL;
+			goto free_job;
+		}
+	}
+
+	if (gather_offset == 0) {
+		SUBMIT_ERR(context, "job must have at least one gather");
+		err = -EINVAL;
+		goto free_job;
+	}
+
+	goto done;
+
+free_job:
+	host1x_job_put(job);
+	job = ERR_PTR(err);
+
+done:
+	kvfree(cmds);
+
+	return job;
+}
+
+static void release_job(struct host1x_job *job)
+{
+	struct tegra_drm_client *client = container_of(job->client, struct tegra_drm_client, base);
+	struct tegra_drm_submit_data *job_data = job->user_data;
+	u32 i;
+
+	if (job->memory_context)
+		host1x_memory_context_put(job->memory_context);
+
+	for (i = 0; i < job_data->num_used_mappings; i++)
+		tegra_drm_mapping_put(job_data->used_mappings[i].mapping);
+
+	kfree(job_data->used_mappings);
+	kfree(job_data);
+
+	pm_runtime_mark_last_busy(client->base.dev);
+	pm_runtime_put_autosuspend(client->base.dev);
+}
+
+int tegra_drm_ioctl_channel_submit(struct drm_device *drm, void *data,
+				   struct drm_file *file)
+{
+	struct tegra_drm_file *fpriv = file->driver_priv;
+	struct drm_tegra_channel_submit *args = data;
+	struct tegra_drm_submit_data *job_data;
+	struct drm_syncobj *syncobj = NULL;
+	struct tegra_drm_context *context;
+	struct host1x_job *job;
+	struct gather_bo *bo;
+	u32 i;
+	int err;
+
+	mutex_lock(&fpriv->lock);
+
+	context = xa_load(&fpriv->contexts, args->context);
+	if (!context) {
+		mutex_unlock(&fpriv->lock);
+		pr_err_ratelimited("%s: %s: invalid channel context '%#x'", __func__,
+				   current->comm, args->context);
+		return -EINVAL;
+	}
+
+	if (args->syncobj_in) {
+		struct dma_fence *fence;
+
+		err = drm_syncobj_find_fence(file, args->syncobj_in, 0, 0, &fence);
+		if (err) {
+			SUBMIT_ERR(context, "invalid syncobj_in '%#x'", args->syncobj_in);
+			goto unlock;
+		}
+
+		err = dma_fence_wait_timeout(fence, true, msecs_to_jiffies(10000));
+		dma_fence_put(fence);
+		if (err) {
+			SUBMIT_ERR(context, "wait for syncobj_in timed out");
+			goto unlock;
+		}
+	}
+
+	if (args->syncobj_out) {
+		syncobj = drm_syncobj_find(file, args->syncobj_out);
+		if (!syncobj) {
+			SUBMIT_ERR(context, "invalid syncobj_out '%#x'", args->syncobj_out);
+			err = -ENOENT;
+			goto unlock;
+		}
+	}
+
+	/* Allocate gather BO and copy gather words in. */
+	err = submit_copy_gather_data(&bo, drm->dev, context, args);
+	if (err)
+		goto unlock;
+
+	job_data = kzalloc(sizeof(*job_data), GFP_KERNEL);
+	if (!job_data) {
+		SUBMIT_ERR(context, "failed to allocate memory for job data");
+		err = -ENOMEM;
+		goto put_bo;
+	}
+
+	/* Get data buffer mappings and do relocation patching. */
+	err = submit_process_bufs(context, bo, args, job_data);
+	if (err)
+		goto free_job_data;
+
+	/* Allocate host1x_job and add gathers and waits to it. */
+	job = submit_create_job(context, bo, args, job_data, &fpriv->syncpoints);
+	if (IS_ERR(job)) {
+		err = PTR_ERR(job);
+		goto free_job_data;
+	}
+
+	/* Map gather data for Host1x. */
+	err = host1x_job_pin(job, context->client->base.dev);
+	if (err) {
+		SUBMIT_ERR(context, "failed to pin job: %d", err);
+		goto put_job;
+	}
+
+	if (context->client->ops->get_streamid_offset) {
+		err = context->client->ops->get_streamid_offset(
+			context->client, &job->engine_streamid_offset);
+		if (err) {
+			SUBMIT_ERR(context, "failed to get streamid offset: %d", err);
+			goto unpin_job;
+		}
+	}
+
+	if (context->memory_context && context->client->ops->can_use_memory_ctx) {
+		bool supported;
+
+		err = context->client->ops->can_use_memory_ctx(context->client, &supported);
+		if (err) {
+			SUBMIT_ERR(context, "failed to detect if engine can use memory context: %d", err);
+			goto unpin_job;
+		}
+
+		if (supported) {
+			job->memory_context = context->memory_context;
+			host1x_memory_context_get(job->memory_context);
+		}
+	} else if (context->client->ops->get_streamid_offset) {
+#ifdef CONFIG_IOMMU_API
+		struct iommu_fwspec *spec;
+
+		/*
+		 * Job submission will need to temporarily change stream ID,
+		 * so need to tell it what to change it back to.
+		 */
+		spec = dev_iommu_fwspec_get(context->client->base.dev);
+		if (spec && spec->num_ids > 0)
+			job->engine_fallback_streamid = spec->ids[0] & 0xffff;
+		else
+			job->engine_fallback_streamid = 0x7f;
+#else
+		job->engine_fallback_streamid = 0x7f;
+#endif
+	}
+
+	/* Boot engine. */
+	err = pm_runtime_resume_and_get(context->client->base.dev);
+	if (err < 0) {
+		SUBMIT_ERR(context, "could not power up engine: %d", err);
+		goto put_memory_context;
+	}
+
+	job->user_data = job_data;
+	job->release = release_job;
+	job->timeout = 10000;
+
+	/*
+	 * job_data is now part of job reference counting, so don't release
+	 * it from here.
+	 */
+	job_data = NULL;
+
+	/* Submit job to hardware. */
+	err = host1x_job_submit(job);
+	if (err) {
+		SUBMIT_ERR(context, "host1x job submission failed: %d", err);
+		goto unpin_job;
+	}
+
+	/* Return postfences to userspace and add fences to DMA reservations. */
+	args->syncpt.value = job->syncpt_end;
+
+	if (syncobj) {
+		struct dma_fence *fence = host1x_fence_create(job->syncpt, job->syncpt_end);
+		if (IS_ERR(fence)) {
+			err = PTR_ERR(fence);
+			SUBMIT_ERR(context, "failed to create postfence: %d", err);
+		}
+
+		drm_syncobj_replace_fence(syncobj, fence);
+	}
+
+	goto put_job;
+
+put_memory_context:
+	if (job->memory_context)
+		host1x_memory_context_put(job->memory_context);
+unpin_job:
+	host1x_job_unpin(job);
+put_job:
+	host1x_job_put(job);
+free_job_data:
+	if (job_data && job_data->used_mappings) {
+		for (i = 0; i < job_data->num_used_mappings; i++)
+			tegra_drm_mapping_put(job_data->used_mappings[i].mapping);
+
+		kfree(job_data->used_mappings);
+	}
+
+	if (job_data)
+		kfree(job_data);
+put_bo:
+	gather_bo_put(&bo->base);
+unlock:
+	if (syncobj)
+		drm_syncobj_put(syncobj);
+
+	mutex_unlock(&fpriv->lock);
+	return err;
+}