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authorLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
committerLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
commit5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch)
treecc5c2d0a898769fd59549594fedb3ee6f84e59a0 /include/drm/ttm/ttm_resource.h
downloadlinux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.tar.gz
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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(). ...
Diffstat (limited to 'include/drm/ttm/ttm_resource.h')
-rw-r--r--include/drm/ttm/ttm_resource.h428
1 files changed, 428 insertions, 0 deletions
diff --git a/include/drm/ttm/ttm_resource.h b/include/drm/ttm/ttm_resource.h
new file mode 100644
index 000000000..78a226eba
--- /dev/null
+++ b/include/drm/ttm/ttm_resource.h
@@ -0,0 +1,428 @@
+/*
+ * Copyright 2020 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Christian König
+ */
+
+#ifndef _TTM_RESOURCE_H_
+#define _TTM_RESOURCE_H_
+
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/iosys-map.h>
+#include <linux/dma-fence.h>
+
+#include <drm/drm_print.h>
+#include <drm/ttm/ttm_caching.h>
+#include <drm/ttm/ttm_kmap_iter.h>
+
+#define TTM_MAX_BO_PRIORITY 4U
+#define TTM_NUM_MEM_TYPES 8
+
+struct ttm_device;
+struct ttm_resource_manager;
+struct ttm_resource;
+struct ttm_place;
+struct ttm_buffer_object;
+struct ttm_placement;
+struct iosys_map;
+struct io_mapping;
+struct sg_table;
+struct scatterlist;
+
+struct ttm_resource_manager_func {
+ /**
+ * struct ttm_resource_manager_func member alloc
+ *
+ * @man: Pointer to a memory type manager.
+ * @bo: Pointer to the buffer object we're allocating space for.
+ * @place: Placement details.
+ * @res: Resulting pointer to the ttm_resource.
+ *
+ * This function should allocate space in the memory type managed
+ * by @man. Placement details if applicable are given by @place. If
+ * successful, a filled in ttm_resource object should be returned in
+ * @res. @res::start should be set to a value identifying the beginning
+ * of the range allocated, and the function should return zero.
+ * If the manager can't fulfill the request -ENOSPC should be returned.
+ * If a system error occurred, preventing the request to be fulfilled,
+ * the function should return a negative error code.
+ *
+ * This function may not be called from within atomic context and needs
+ * to take care of its own locking to protect any data structures
+ * managing the space.
+ */
+ int (*alloc)(struct ttm_resource_manager *man,
+ struct ttm_buffer_object *bo,
+ const struct ttm_place *place,
+ struct ttm_resource **res);
+
+ /**
+ * struct ttm_resource_manager_func member free
+ *
+ * @man: Pointer to a memory type manager.
+ * @res: Pointer to a struct ttm_resource to be freed.
+ *
+ * This function frees memory type resources previously allocated.
+ * May not be called from within atomic context.
+ */
+ void (*free)(struct ttm_resource_manager *man,
+ struct ttm_resource *res);
+
+ /**
+ * struct ttm_resource_manager_func member intersects
+ *
+ * @man: Pointer to a memory type manager.
+ * @res: Pointer to a struct ttm_resource to be checked.
+ * @place: Placement to check against.
+ * @size: Size of the check.
+ *
+ * Test if @res intersects with @place + @size. Used to judge if
+ * evictions are valueable or not.
+ */
+ bool (*intersects)(struct ttm_resource_manager *man,
+ struct ttm_resource *res,
+ const struct ttm_place *place,
+ size_t size);
+
+ /**
+ * struct ttm_resource_manager_func member compatible
+ *
+ * @man: Pointer to a memory type manager.
+ * @res: Pointer to a struct ttm_resource to be checked.
+ * @place: Placement to check against.
+ * @size: Size of the check.
+ *
+ * Test if @res compatible with @place + @size. Used to check of
+ * the need to move the backing store or not.
+ */
+ bool (*compatible)(struct ttm_resource_manager *man,
+ struct ttm_resource *res,
+ const struct ttm_place *place,
+ size_t size);
+
+ /**
+ * struct ttm_resource_manager_func member debug
+ *
+ * @man: Pointer to a memory type manager.
+ * @printer: Prefix to be used in printout to identify the caller.
+ *
+ * This function is called to print out the state of the memory
+ * type manager to aid debugging of out-of-memory conditions.
+ * It may not be called from within atomic context.
+ */
+ void (*debug)(struct ttm_resource_manager *man,
+ struct drm_printer *printer);
+};
+
+/**
+ * struct ttm_resource_manager
+ *
+ * @use_type: The memory type is enabled.
+ * @use_tt: If a TT object should be used for the backing store.
+ * @size: Size of the managed region.
+ * @bdev: ttm device this manager belongs to
+ * @func: structure pointer implementing the range manager. See above
+ * @move_lock: lock for move fence
+ * @move: The fence of the last pipelined move operation.
+ * @lru: The lru list for this memory type.
+ *
+ * This structure is used to identify and manage memory types for a device.
+ */
+struct ttm_resource_manager {
+ /*
+ * No protection. Constant from start.
+ */
+ bool use_type;
+ bool use_tt;
+ struct ttm_device *bdev;
+ uint64_t size;
+ const struct ttm_resource_manager_func *func;
+ spinlock_t move_lock;
+
+ /*
+ * Protected by @move_lock.
+ */
+ struct dma_fence *move;
+
+ /*
+ * Protected by the bdev->lru_lock.
+ */
+ struct list_head lru[TTM_MAX_BO_PRIORITY];
+
+ /**
+ * @usage: How much of the resources are used, protected by the
+ * bdev->lru_lock.
+ */
+ uint64_t usage;
+};
+
+/**
+ * struct ttm_bus_placement
+ *
+ * @addr: mapped virtual address
+ * @offset: physical addr
+ * @is_iomem: is this io memory ?
+ * @caching: See enum ttm_caching
+ *
+ * Structure indicating the bus placement of an object.
+ */
+struct ttm_bus_placement {
+ void *addr;
+ phys_addr_t offset;
+ bool is_iomem;
+ enum ttm_caching caching;
+};
+
+/**
+ * struct ttm_resource
+ *
+ * @start: Start of the allocation.
+ * @size: Actual size of resource in bytes.
+ * @mem_type: Resource type of the allocation.
+ * @placement: Placement flags.
+ * @bus: Placement on io bus accessible to the CPU
+ * @bo: weak reference to the BO, protected by ttm_device::lru_lock
+ *
+ * Structure indicating the placement and space resources used by a
+ * buffer object.
+ */
+struct ttm_resource {
+ unsigned long start;
+ size_t size;
+ uint32_t mem_type;
+ uint32_t placement;
+ struct ttm_bus_placement bus;
+ struct ttm_buffer_object *bo;
+
+ /**
+ * @lru: Least recently used list, see &ttm_resource_manager.lru
+ */
+ struct list_head lru;
+};
+
+/**
+ * struct ttm_resource_cursor
+ *
+ * @priority: the current priority
+ *
+ * Cursor to iterate over the resources in a manager.
+ */
+struct ttm_resource_cursor {
+ unsigned int priority;
+};
+
+/**
+ * struct ttm_lru_bulk_move_pos
+ *
+ * @first: first res in the bulk move range
+ * @last: last res in the bulk move range
+ *
+ * Range of resources for a lru bulk move.
+ */
+struct ttm_lru_bulk_move_pos {
+ struct ttm_resource *first;
+ struct ttm_resource *last;
+};
+
+/**
+ * struct ttm_lru_bulk_move
+ *
+ * @pos: first/last lru entry for resources in the each domain/priority
+ *
+ * Container for the current bulk move state. Should be used with
+ * ttm_lru_bulk_move_init() and ttm_bo_set_bulk_move().
+ */
+struct ttm_lru_bulk_move {
+ struct ttm_lru_bulk_move_pos pos[TTM_NUM_MEM_TYPES][TTM_MAX_BO_PRIORITY];
+};
+
+/**
+ * struct ttm_kmap_iter_iomap - Specialization for a struct io_mapping +
+ * struct sg_table backed struct ttm_resource.
+ * @base: Embedded struct ttm_kmap_iter providing the usage interface.
+ * @iomap: struct io_mapping representing the underlying linear io_memory.
+ * @st: sg_table into @iomap, representing the memory of the struct ttm_resource.
+ * @start: Offset that needs to be subtracted from @st to make
+ * sg_dma_address(st->sgl) - @start == 0 for @iomap start.
+ * @cache: Scatterlist traversal cache for fast lookups.
+ * @cache.sg: Pointer to the currently cached scatterlist segment.
+ * @cache.i: First index of @sg. PAGE_SIZE granularity.
+ * @cache.end: Last index + 1 of @sg. PAGE_SIZE granularity.
+ * @cache.offs: First offset into @iomap of @sg. PAGE_SIZE granularity.
+ */
+struct ttm_kmap_iter_iomap {
+ struct ttm_kmap_iter base;
+ struct io_mapping *iomap;
+ struct sg_table *st;
+ resource_size_t start;
+ struct {
+ struct scatterlist *sg;
+ pgoff_t i;
+ pgoff_t end;
+ pgoff_t offs;
+ } cache;
+};
+
+/**
+ * struct ttm_kmap_iter_linear_io - Iterator specialization for linear io
+ * @base: The base iterator
+ * @dmap: Points to the starting address of the region
+ * @needs_unmap: Whether we need to unmap on fini
+ */
+struct ttm_kmap_iter_linear_io {
+ struct ttm_kmap_iter base;
+ struct iosys_map dmap;
+ bool needs_unmap;
+};
+
+/**
+ * ttm_resource_manager_set_used
+ *
+ * @man: A memory manager object.
+ * @used: usage state to set.
+ *
+ * Set the manager in use flag. If disabled the manager is no longer
+ * used for object placement.
+ */
+static inline void
+ttm_resource_manager_set_used(struct ttm_resource_manager *man, bool used)
+{
+ int i;
+
+ for (i = 0; i < TTM_MAX_BO_PRIORITY; i++)
+ WARN_ON(!list_empty(&man->lru[i]));
+ man->use_type = used;
+}
+
+/**
+ * ttm_resource_manager_used
+ *
+ * @man: Manager to get used state for
+ *
+ * Get the in use flag for a manager.
+ * Returns:
+ * true is used, false if not.
+ */
+static inline bool ttm_resource_manager_used(struct ttm_resource_manager *man)
+{
+ return man->use_type;
+}
+
+/**
+ * ttm_resource_manager_cleanup
+ *
+ * @man: A memory manager object.
+ *
+ * Cleanup the move fences from the memory manager object.
+ */
+static inline void
+ttm_resource_manager_cleanup(struct ttm_resource_manager *man)
+{
+ dma_fence_put(man->move);
+ man->move = NULL;
+}
+
+void ttm_lru_bulk_move_init(struct ttm_lru_bulk_move *bulk);
+void ttm_lru_bulk_move_tail(struct ttm_lru_bulk_move *bulk);
+
+void ttm_resource_add_bulk_move(struct ttm_resource *res,
+ struct ttm_buffer_object *bo);
+void ttm_resource_del_bulk_move(struct ttm_resource *res,
+ struct ttm_buffer_object *bo);
+void ttm_resource_move_to_lru_tail(struct ttm_resource *res);
+
+void ttm_resource_init(struct ttm_buffer_object *bo,
+ const struct ttm_place *place,
+ struct ttm_resource *res);
+void ttm_resource_fini(struct ttm_resource_manager *man,
+ struct ttm_resource *res);
+
+int ttm_resource_alloc(struct ttm_buffer_object *bo,
+ const struct ttm_place *place,
+ struct ttm_resource **res);
+void ttm_resource_free(struct ttm_buffer_object *bo, struct ttm_resource **res);
+bool ttm_resource_intersects(struct ttm_device *bdev,
+ struct ttm_resource *res,
+ const struct ttm_place *place,
+ size_t size);
+bool ttm_resource_compatible(struct ttm_device *bdev,
+ struct ttm_resource *res,
+ const struct ttm_place *place,
+ size_t size);
+bool ttm_resource_compat(struct ttm_resource *res,
+ struct ttm_placement *placement);
+void ttm_resource_set_bo(struct ttm_resource *res,
+ struct ttm_buffer_object *bo);
+
+void ttm_resource_manager_init(struct ttm_resource_manager *man,
+ struct ttm_device *bdev,
+ uint64_t size);
+
+int ttm_resource_manager_evict_all(struct ttm_device *bdev,
+ struct ttm_resource_manager *man);
+
+uint64_t ttm_resource_manager_usage(struct ttm_resource_manager *man);
+void ttm_resource_manager_debug(struct ttm_resource_manager *man,
+ struct drm_printer *p);
+
+struct ttm_resource *
+ttm_resource_manager_first(struct ttm_resource_manager *man,
+ struct ttm_resource_cursor *cursor);
+struct ttm_resource *
+ttm_resource_manager_next(struct ttm_resource_manager *man,
+ struct ttm_resource_cursor *cursor,
+ struct ttm_resource *res);
+
+/**
+ * ttm_resource_manager_for_each_res - iterate over all resources
+ * @man: the resource manager
+ * @cursor: struct ttm_resource_cursor for the current position
+ * @res: the current resource
+ *
+ * Iterate over all the evictable resources in a resource manager.
+ */
+#define ttm_resource_manager_for_each_res(man, cursor, res) \
+ for (res = ttm_resource_manager_first(man, cursor); res; \
+ res = ttm_resource_manager_next(man, cursor, res))
+
+struct ttm_kmap_iter *
+ttm_kmap_iter_iomap_init(struct ttm_kmap_iter_iomap *iter_io,
+ struct io_mapping *iomap,
+ struct sg_table *st,
+ resource_size_t start);
+
+struct ttm_kmap_iter_linear_io;
+
+struct ttm_kmap_iter *
+ttm_kmap_iter_linear_io_init(struct ttm_kmap_iter_linear_io *iter_io,
+ struct ttm_device *bdev,
+ struct ttm_resource *mem);
+
+void ttm_kmap_iter_linear_io_fini(struct ttm_kmap_iter_linear_io *iter_io,
+ struct ttm_device *bdev,
+ struct ttm_resource *mem);
+
+void ttm_resource_manager_create_debugfs(struct ttm_resource_manager *man,
+ struct dentry * parent,
+ const char *name);
+#endif