From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 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(). ... --- drivers/gpu/drm/ttm/ttm_bo_util.c | 677 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 677 insertions(+) create mode 100644 drivers/gpu/drm/ttm/ttm_bo_util.c (limited to 'drivers/gpu/drm/ttm/ttm_bo_util.c') diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c new file mode 100644 index 000000000..da5493f78 --- /dev/null +++ b/drivers/gpu/drm/ttm/ttm_bo_util.c @@ -0,0 +1,677 @@ +/* SPDX-License-Identifier: GPL-2.0 OR MIT */ +/************************************************************************** + * + * Copyright (c) 2007-2009 VMware, Inc., Palo Alto, CA., USA + * All Rights Reserved. + * + * 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, sub license, 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 (including the + * next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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: Thomas Hellstrom + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct ttm_transfer_obj { + struct ttm_buffer_object base; + struct ttm_buffer_object *bo; +}; + +int ttm_mem_io_reserve(struct ttm_device *bdev, + struct ttm_resource *mem) +{ + if (mem->bus.offset || mem->bus.addr) + return 0; + + mem->bus.is_iomem = false; + if (!bdev->funcs->io_mem_reserve) + return 0; + + return bdev->funcs->io_mem_reserve(bdev, mem); +} + +void ttm_mem_io_free(struct ttm_device *bdev, + struct ttm_resource *mem) +{ + if (!mem) + return; + + if (!mem->bus.offset && !mem->bus.addr) + return; + + if (bdev->funcs->io_mem_free) + bdev->funcs->io_mem_free(bdev, mem); + + mem->bus.offset = 0; + mem->bus.addr = NULL; +} + +/** + * ttm_move_memcpy - Helper to perform a memcpy ttm move operation. + * @clear: Whether to clear rather than copy. + * @num_pages: Number of pages of the operation. + * @dst_iter: A struct ttm_kmap_iter representing the destination resource. + * @src_iter: A struct ttm_kmap_iter representing the source resource. + * + * This function is intended to be able to move out async under a + * dma-fence if desired. + */ +void ttm_move_memcpy(bool clear, + u32 num_pages, + struct ttm_kmap_iter *dst_iter, + struct ttm_kmap_iter *src_iter) +{ + const struct ttm_kmap_iter_ops *dst_ops = dst_iter->ops; + const struct ttm_kmap_iter_ops *src_ops = src_iter->ops; + struct iosys_map src_map, dst_map; + pgoff_t i; + + /* Single TTM move. NOP */ + if (dst_ops->maps_tt && src_ops->maps_tt) + return; + + /* Don't move nonexistent data. Clear destination instead. */ + if (clear) { + for (i = 0; i < num_pages; ++i) { + dst_ops->map_local(dst_iter, &dst_map, i); + if (dst_map.is_iomem) + memset_io(dst_map.vaddr_iomem, 0, PAGE_SIZE); + else + memset(dst_map.vaddr, 0, PAGE_SIZE); + if (dst_ops->unmap_local) + dst_ops->unmap_local(dst_iter, &dst_map); + } + return; + } + + for (i = 0; i < num_pages; ++i) { + dst_ops->map_local(dst_iter, &dst_map, i); + src_ops->map_local(src_iter, &src_map, i); + + drm_memcpy_from_wc(&dst_map, &src_map, PAGE_SIZE); + + if (src_ops->unmap_local) + src_ops->unmap_local(src_iter, &src_map); + if (dst_ops->unmap_local) + dst_ops->unmap_local(dst_iter, &dst_map); + } +} +EXPORT_SYMBOL(ttm_move_memcpy); + +int ttm_bo_move_memcpy(struct ttm_buffer_object *bo, + struct ttm_operation_ctx *ctx, + struct ttm_resource *dst_mem) +{ + struct ttm_device *bdev = bo->bdev; + struct ttm_resource_manager *dst_man = + ttm_manager_type(bo->bdev, dst_mem->mem_type); + struct ttm_tt *ttm = bo->ttm; + struct ttm_resource *src_mem = bo->resource; + struct ttm_resource_manager *src_man; + union { + struct ttm_kmap_iter_tt tt; + struct ttm_kmap_iter_linear_io io; + } _dst_iter, _src_iter; + struct ttm_kmap_iter *dst_iter, *src_iter; + bool clear; + int ret = 0; + + if (!src_mem) + return 0; + + src_man = ttm_manager_type(bdev, src_mem->mem_type); + if (ttm && ((ttm->page_flags & TTM_TT_FLAG_SWAPPED) || + dst_man->use_tt)) { + ret = ttm_tt_populate(bdev, ttm, ctx); + if (ret) + return ret; + } + + dst_iter = ttm_kmap_iter_linear_io_init(&_dst_iter.io, bdev, dst_mem); + if (PTR_ERR(dst_iter) == -EINVAL && dst_man->use_tt) + dst_iter = ttm_kmap_iter_tt_init(&_dst_iter.tt, bo->ttm); + if (IS_ERR(dst_iter)) + return PTR_ERR(dst_iter); + + src_iter = ttm_kmap_iter_linear_io_init(&_src_iter.io, bdev, src_mem); + if (PTR_ERR(src_iter) == -EINVAL && src_man->use_tt) + src_iter = ttm_kmap_iter_tt_init(&_src_iter.tt, bo->ttm); + if (IS_ERR(src_iter)) { + ret = PTR_ERR(src_iter); + goto out_src_iter; + } + + clear = src_iter->ops->maps_tt && (!ttm || !ttm_tt_is_populated(ttm)); + if (!(clear && ttm && !(ttm->page_flags & TTM_TT_FLAG_ZERO_ALLOC))) + ttm_move_memcpy(clear, PFN_UP(dst_mem->size), dst_iter, src_iter); + + if (!src_iter->ops->maps_tt) + ttm_kmap_iter_linear_io_fini(&_src_iter.io, bdev, src_mem); + ttm_bo_move_sync_cleanup(bo, dst_mem); + +out_src_iter: + if (!dst_iter->ops->maps_tt) + ttm_kmap_iter_linear_io_fini(&_dst_iter.io, bdev, dst_mem); + + return ret; +} +EXPORT_SYMBOL(ttm_bo_move_memcpy); + +static void ttm_transfered_destroy(struct ttm_buffer_object *bo) +{ + struct ttm_transfer_obj *fbo; + + fbo = container_of(bo, struct ttm_transfer_obj, base); + dma_resv_fini(&fbo->base.base._resv); + ttm_bo_put(fbo->bo); + kfree(fbo); +} + +/** + * ttm_buffer_object_transfer + * + * @bo: A pointer to a struct ttm_buffer_object. + * @new_obj: A pointer to a pointer to a newly created ttm_buffer_object, + * holding the data of @bo with the old placement. + * + * This is a utility function that may be called after an accelerated move + * has been scheduled. A new buffer object is created as a placeholder for + * the old data while it's being copied. When that buffer object is idle, + * it can be destroyed, releasing the space of the old placement. + * Returns: + * !0: Failure. + */ + +static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo, + struct ttm_buffer_object **new_obj) +{ + struct ttm_transfer_obj *fbo; + int ret; + + fbo = kmalloc(sizeof(*fbo), GFP_KERNEL); + if (!fbo) + return -ENOMEM; + + fbo->base = *bo; + + /** + * Fix up members that we shouldn't copy directly: + * TODO: Explicit member copy would probably be better here. + */ + + atomic_inc(&ttm_glob.bo_count); + INIT_LIST_HEAD(&fbo->base.ddestroy); + drm_vma_node_reset(&fbo->base.base.vma_node); + + kref_init(&fbo->base.kref); + fbo->base.destroy = &ttm_transfered_destroy; + fbo->base.pin_count = 0; + if (bo->type != ttm_bo_type_sg) + fbo->base.base.resv = &fbo->base.base._resv; + + dma_resv_init(&fbo->base.base._resv); + fbo->base.base.dev = NULL; + ret = dma_resv_trylock(&fbo->base.base._resv); + WARN_ON(!ret); + + if (fbo->base.resource) { + ttm_resource_set_bo(fbo->base.resource, &fbo->base); + bo->resource = NULL; + ttm_bo_set_bulk_move(&fbo->base, NULL); + } else { + fbo->base.bulk_move = NULL; + } + + ret = dma_resv_reserve_fences(&fbo->base.base._resv, 1); + if (ret) { + kfree(fbo); + return ret; + } + + ttm_bo_get(bo); + fbo->bo = bo; + + ttm_bo_move_to_lru_tail_unlocked(&fbo->base); + + *new_obj = &fbo->base; + return 0; +} + +pgprot_t ttm_io_prot(struct ttm_buffer_object *bo, struct ttm_resource *res, + pgprot_t tmp) +{ + struct ttm_resource_manager *man; + enum ttm_caching caching; + + man = ttm_manager_type(bo->bdev, res->mem_type); + caching = man->use_tt ? bo->ttm->caching : res->bus.caching; + + return ttm_prot_from_caching(caching, tmp); +} +EXPORT_SYMBOL(ttm_io_prot); + +static int ttm_bo_ioremap(struct ttm_buffer_object *bo, + unsigned long offset, + unsigned long size, + struct ttm_bo_kmap_obj *map) +{ + struct ttm_resource *mem = bo->resource; + + if (bo->resource->bus.addr) { + map->bo_kmap_type = ttm_bo_map_premapped; + map->virtual = ((u8 *)bo->resource->bus.addr) + offset; + } else { + resource_size_t res = bo->resource->bus.offset + offset; + + map->bo_kmap_type = ttm_bo_map_iomap; + if (mem->bus.caching == ttm_write_combined) + map->virtual = ioremap_wc(res, size); +#ifdef CONFIG_X86 + else if (mem->bus.caching == ttm_cached) + map->virtual = ioremap_cache(res, size); +#endif + else + map->virtual = ioremap(res, size); + } + return (!map->virtual) ? -ENOMEM : 0; +} + +static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo, + unsigned long start_page, + unsigned long num_pages, + struct ttm_bo_kmap_obj *map) +{ + struct ttm_resource *mem = bo->resource; + struct ttm_operation_ctx ctx = { + .interruptible = false, + .no_wait_gpu = false + }; + struct ttm_tt *ttm = bo->ttm; + pgprot_t prot; + int ret; + + BUG_ON(!ttm); + + ret = ttm_tt_populate(bo->bdev, ttm, &ctx); + if (ret) + return ret; + + if (num_pages == 1 && ttm->caching == ttm_cached) { + /* + * We're mapping a single page, and the desired + * page protection is consistent with the bo. + */ + + map->bo_kmap_type = ttm_bo_map_kmap; + map->page = ttm->pages[start_page]; + map->virtual = kmap(map->page); + } else { + /* + * We need to use vmap to get the desired page protection + * or to make the buffer object look contiguous. + */ + prot = ttm_io_prot(bo, mem, PAGE_KERNEL); + map->bo_kmap_type = ttm_bo_map_vmap; + map->virtual = vmap(ttm->pages + start_page, num_pages, + 0, prot); + } + return (!map->virtual) ? -ENOMEM : 0; +} + +int ttm_bo_kmap(struct ttm_buffer_object *bo, + unsigned long start_page, unsigned long num_pages, + struct ttm_bo_kmap_obj *map) +{ + unsigned long offset, size; + int ret; + + map->virtual = NULL; + map->bo = bo; + if (num_pages > PFN_UP(bo->resource->size)) + return -EINVAL; + if ((start_page + num_pages) > PFN_UP(bo->resource->size)) + return -EINVAL; + + ret = ttm_mem_io_reserve(bo->bdev, bo->resource); + if (ret) + return ret; + if (!bo->resource->bus.is_iomem) { + return ttm_bo_kmap_ttm(bo, start_page, num_pages, map); + } else { + offset = start_page << PAGE_SHIFT; + size = num_pages << PAGE_SHIFT; + return ttm_bo_ioremap(bo, offset, size, map); + } +} +EXPORT_SYMBOL(ttm_bo_kmap); + +void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map) +{ + if (!map->virtual) + return; + switch (map->bo_kmap_type) { + case ttm_bo_map_iomap: + iounmap(map->virtual); + break; + case ttm_bo_map_vmap: + vunmap(map->virtual); + break; + case ttm_bo_map_kmap: + kunmap(map->page); + break; + case ttm_bo_map_premapped: + break; + default: + BUG(); + } + ttm_mem_io_free(map->bo->bdev, map->bo->resource); + map->virtual = NULL; + map->page = NULL; +} +EXPORT_SYMBOL(ttm_bo_kunmap); + +int ttm_bo_vmap(struct ttm_buffer_object *bo, struct iosys_map *map) +{ + struct ttm_resource *mem = bo->resource; + int ret; + + dma_resv_assert_held(bo->base.resv); + + ret = ttm_mem_io_reserve(bo->bdev, mem); + if (ret) + return ret; + + if (mem->bus.is_iomem) { + void __iomem *vaddr_iomem; + + if (mem->bus.addr) + vaddr_iomem = (void __iomem *)mem->bus.addr; + else if (mem->bus.caching == ttm_write_combined) + vaddr_iomem = ioremap_wc(mem->bus.offset, + bo->base.size); +#ifdef CONFIG_X86 + else if (mem->bus.caching == ttm_cached) + vaddr_iomem = ioremap_cache(mem->bus.offset, + bo->base.size); +#endif + else + vaddr_iomem = ioremap(mem->bus.offset, bo->base.size); + + if (!vaddr_iomem) + return -ENOMEM; + + iosys_map_set_vaddr_iomem(map, vaddr_iomem); + + } else { + struct ttm_operation_ctx ctx = { + .interruptible = false, + .no_wait_gpu = false + }; + struct ttm_tt *ttm = bo->ttm; + pgprot_t prot; + void *vaddr; + + ret = ttm_tt_populate(bo->bdev, ttm, &ctx); + if (ret) + return ret; + + /* + * We need to use vmap to get the desired page protection + * or to make the buffer object look contiguous. + */ + prot = ttm_io_prot(bo, mem, PAGE_KERNEL); + vaddr = vmap(ttm->pages, ttm->num_pages, 0, prot); + if (!vaddr) + return -ENOMEM; + + iosys_map_set_vaddr(map, vaddr); + } + + return 0; +} +EXPORT_SYMBOL(ttm_bo_vmap); + +void ttm_bo_vunmap(struct ttm_buffer_object *bo, struct iosys_map *map) +{ + struct ttm_resource *mem = bo->resource; + + dma_resv_assert_held(bo->base.resv); + + if (iosys_map_is_null(map)) + return; + + if (!map->is_iomem) + vunmap(map->vaddr); + else if (!mem->bus.addr) + iounmap(map->vaddr_iomem); + iosys_map_clear(map); + + ttm_mem_io_free(bo->bdev, bo->resource); +} +EXPORT_SYMBOL(ttm_bo_vunmap); + +static int ttm_bo_wait_free_node(struct ttm_buffer_object *bo, + bool dst_use_tt) +{ + int ret; + ret = ttm_bo_wait(bo, false, false); + if (ret) + return ret; + + if (!dst_use_tt) + ttm_bo_tt_destroy(bo); + ttm_resource_free(bo, &bo->resource); + return 0; +} + +static int ttm_bo_move_to_ghost(struct ttm_buffer_object *bo, + struct dma_fence *fence, + bool dst_use_tt) +{ + struct ttm_buffer_object *ghost_obj; + int ret; + + /** + * This should help pipeline ordinary buffer moves. + * + * Hang old buffer memory on a new buffer object, + * and leave it to be released when the GPU + * operation has completed. + */ + + ret = ttm_buffer_object_transfer(bo, &ghost_obj); + if (ret) + return ret; + + dma_resv_add_fence(&ghost_obj->base._resv, fence, + DMA_RESV_USAGE_KERNEL); + + /** + * If we're not moving to fixed memory, the TTM object + * needs to stay alive. Otherwhise hang it on the ghost + * bo to be unbound and destroyed. + */ + + if (dst_use_tt) + ghost_obj->ttm = NULL; + else + bo->ttm = NULL; + + dma_resv_unlock(&ghost_obj->base._resv); + ttm_bo_put(ghost_obj); + return 0; +} + +static void ttm_bo_move_pipeline_evict(struct ttm_buffer_object *bo, + struct dma_fence *fence) +{ + struct ttm_device *bdev = bo->bdev; + struct ttm_resource_manager *from; + + from = ttm_manager_type(bdev, bo->resource->mem_type); + + /** + * BO doesn't have a TTM we need to bind/unbind. Just remember + * this eviction and free up the allocation + */ + spin_lock(&from->move_lock); + if (!from->move || dma_fence_is_later(fence, from->move)) { + dma_fence_put(from->move); + from->move = dma_fence_get(fence); + } + spin_unlock(&from->move_lock); + + ttm_resource_free(bo, &bo->resource); +} + +int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo, + struct dma_fence *fence, + bool evict, + bool pipeline, + struct ttm_resource *new_mem) +{ + struct ttm_device *bdev = bo->bdev; + struct ttm_resource_manager *from = ttm_manager_type(bdev, bo->resource->mem_type); + struct ttm_resource_manager *man = ttm_manager_type(bdev, new_mem->mem_type); + int ret = 0; + + dma_resv_add_fence(bo->base.resv, fence, DMA_RESV_USAGE_KERNEL); + if (!evict) + ret = ttm_bo_move_to_ghost(bo, fence, man->use_tt); + else if (!from->use_tt && pipeline) + ttm_bo_move_pipeline_evict(bo, fence); + else + ret = ttm_bo_wait_free_node(bo, man->use_tt); + + if (ret) + return ret; + + ttm_bo_assign_mem(bo, new_mem); + + return 0; +} +EXPORT_SYMBOL(ttm_bo_move_accel_cleanup); + +void ttm_bo_move_sync_cleanup(struct ttm_buffer_object *bo, + struct ttm_resource *new_mem) +{ + struct ttm_device *bdev = bo->bdev; + struct ttm_resource_manager *man = ttm_manager_type(bdev, new_mem->mem_type); + int ret; + + ret = ttm_bo_wait_free_node(bo, man->use_tt); + if (WARN_ON(ret)) + return; + + ttm_bo_assign_mem(bo, new_mem); +} +EXPORT_SYMBOL(ttm_bo_move_sync_cleanup); + +/** + * ttm_bo_pipeline_gutting - purge the contents of a bo + * @bo: The buffer object + * + * Purge the contents of a bo, async if the bo is not idle. + * After a successful call, the bo is left unpopulated in + * system placement. The function may wait uninterruptible + * for idle on OOM. + * + * Return: 0 if successful, negative error code on failure. + */ +int ttm_bo_pipeline_gutting(struct ttm_buffer_object *bo) +{ + static const struct ttm_place sys_mem = { .mem_type = TTM_PL_SYSTEM }; + struct ttm_buffer_object *ghost; + struct ttm_resource *sys_res; + struct ttm_tt *ttm; + int ret; + + ret = ttm_resource_alloc(bo, &sys_mem, &sys_res); + if (ret) + return ret; + + /* If already idle, no need for ghost object dance. */ + ret = ttm_bo_wait(bo, false, true); + if (ret != -EBUSY) { + if (!bo->ttm) { + /* See comment below about clearing. */ + ret = ttm_tt_create(bo, true); + if (ret) + goto error_free_sys_mem; + } else { + ttm_tt_unpopulate(bo->bdev, bo->ttm); + if (bo->type == ttm_bo_type_device) + ttm_tt_mark_for_clear(bo->ttm); + } + ttm_resource_free(bo, &bo->resource); + ttm_bo_assign_mem(bo, sys_res); + return 0; + } + + /* + * We need an unpopulated ttm_tt after giving our current one, + * if any, to the ghost object. And we can't afford to fail + * creating one *after* the operation. If the bo subsequently gets + * resurrected, make sure it's cleared (if ttm_bo_type_device) + * to avoid leaking sensitive information to user-space. + */ + + ttm = bo->ttm; + bo->ttm = NULL; + ret = ttm_tt_create(bo, true); + swap(bo->ttm, ttm); + if (ret) + goto error_free_sys_mem; + + ret = ttm_buffer_object_transfer(bo, &ghost); + if (ret) + goto error_destroy_tt; + + ret = dma_resv_copy_fences(&ghost->base._resv, bo->base.resv); + /* Last resort, wait for the BO to be idle when we are OOM */ + if (ret) + ttm_bo_wait(bo, false, false); + + dma_resv_unlock(&ghost->base._resv); + ttm_bo_put(ghost); + bo->ttm = ttm; + ttm_bo_assign_mem(bo, sys_res); + return 0; + +error_destroy_tt: + ttm_tt_destroy(bo->bdev, ttm); + +error_free_sys_mem: + ttm_resource_free(bo, &sys_res); + return ret; +} -- cgit v1.2.3