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/rockchip/rockchip_drm_gem.c | 548 ++++++++++++++++++++++++++++ 1 file changed, 548 insertions(+) create mode 100644 drivers/gpu/drm/rockchip/rockchip_drm_gem.c (limited to 'drivers/gpu/drm/rockchip/rockchip_drm_gem.c') diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c new file mode 100644 index 000000000..6edb7c52c --- /dev/null +++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c @@ -0,0 +1,548 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd + * Author:Mark Yao + */ + +#include +#include +#include + +#include +#include +#include +#include +#include +#include + +#include "rockchip_drm_drv.h" +#include "rockchip_drm_gem.h" + +static int rockchip_gem_iommu_map(struct rockchip_gem_object *rk_obj) +{ + struct drm_device *drm = rk_obj->base.dev; + struct rockchip_drm_private *private = drm->dev_private; + int prot = IOMMU_READ | IOMMU_WRITE; + ssize_t ret; + + mutex_lock(&private->mm_lock); + ret = drm_mm_insert_node_generic(&private->mm, &rk_obj->mm, + rk_obj->base.size, PAGE_SIZE, + 0, 0); + mutex_unlock(&private->mm_lock); + + if (ret < 0) { + DRM_ERROR("out of I/O virtual memory: %zd\n", ret); + return ret; + } + + rk_obj->dma_addr = rk_obj->mm.start; + + ret = iommu_map_sgtable(private->domain, rk_obj->dma_addr, rk_obj->sgt, + prot); + if (ret < rk_obj->base.size) { + DRM_ERROR("failed to map buffer: size=%zd request_size=%zd\n", + ret, rk_obj->base.size); + ret = -ENOMEM; + goto err_remove_node; + } + + rk_obj->size = ret; + + return 0; + +err_remove_node: + mutex_lock(&private->mm_lock); + drm_mm_remove_node(&rk_obj->mm); + mutex_unlock(&private->mm_lock); + + return ret; +} + +static int rockchip_gem_iommu_unmap(struct rockchip_gem_object *rk_obj) +{ + struct drm_device *drm = rk_obj->base.dev; + struct rockchip_drm_private *private = drm->dev_private; + + iommu_unmap(private->domain, rk_obj->dma_addr, rk_obj->size); + + mutex_lock(&private->mm_lock); + + drm_mm_remove_node(&rk_obj->mm); + + mutex_unlock(&private->mm_lock); + + return 0; +} + +static int rockchip_gem_get_pages(struct rockchip_gem_object *rk_obj) +{ + struct drm_device *drm = rk_obj->base.dev; + int ret, i; + struct scatterlist *s; + + rk_obj->pages = drm_gem_get_pages(&rk_obj->base); + if (IS_ERR(rk_obj->pages)) + return PTR_ERR(rk_obj->pages); + + rk_obj->num_pages = rk_obj->base.size >> PAGE_SHIFT; + + rk_obj->sgt = drm_prime_pages_to_sg(rk_obj->base.dev, + rk_obj->pages, rk_obj->num_pages); + if (IS_ERR(rk_obj->sgt)) { + ret = PTR_ERR(rk_obj->sgt); + goto err_put_pages; + } + + /* + * Fake up the SG table so that dma_sync_sg_for_device() can be used + * to flush the pages associated with it. + * + * TODO: Replace this by drm_clflush_sg() once it can be implemented + * without relying on symbols that are not exported. + */ + for_each_sgtable_sg(rk_obj->sgt, s, i) + sg_dma_address(s) = sg_phys(s); + + dma_sync_sgtable_for_device(drm->dev, rk_obj->sgt, DMA_TO_DEVICE); + + return 0; + +err_put_pages: + drm_gem_put_pages(&rk_obj->base, rk_obj->pages, false, false); + return ret; +} + +static void rockchip_gem_put_pages(struct rockchip_gem_object *rk_obj) +{ + sg_free_table(rk_obj->sgt); + kfree(rk_obj->sgt); + drm_gem_put_pages(&rk_obj->base, rk_obj->pages, true, true); +} + +static int rockchip_gem_alloc_iommu(struct rockchip_gem_object *rk_obj, + bool alloc_kmap) +{ + int ret; + + ret = rockchip_gem_get_pages(rk_obj); + if (ret < 0) + return ret; + + ret = rockchip_gem_iommu_map(rk_obj); + if (ret < 0) + goto err_free; + + if (alloc_kmap) { + rk_obj->kvaddr = vmap(rk_obj->pages, rk_obj->num_pages, VM_MAP, + pgprot_writecombine(PAGE_KERNEL)); + if (!rk_obj->kvaddr) { + DRM_ERROR("failed to vmap() buffer\n"); + ret = -ENOMEM; + goto err_unmap; + } + } + + return 0; + +err_unmap: + rockchip_gem_iommu_unmap(rk_obj); +err_free: + rockchip_gem_put_pages(rk_obj); + + return ret; +} + +static int rockchip_gem_alloc_dma(struct rockchip_gem_object *rk_obj, + bool alloc_kmap) +{ + struct drm_gem_object *obj = &rk_obj->base; + struct drm_device *drm = obj->dev; + + rk_obj->dma_attrs = DMA_ATTR_WRITE_COMBINE; + + if (!alloc_kmap) + rk_obj->dma_attrs |= DMA_ATTR_NO_KERNEL_MAPPING; + + rk_obj->kvaddr = dma_alloc_attrs(drm->dev, obj->size, + &rk_obj->dma_addr, GFP_KERNEL, + rk_obj->dma_attrs); + if (!rk_obj->kvaddr) { + DRM_ERROR("failed to allocate %zu byte dma buffer", obj->size); + return -ENOMEM; + } + + return 0; +} + +static int rockchip_gem_alloc_buf(struct rockchip_gem_object *rk_obj, + bool alloc_kmap) +{ + struct drm_gem_object *obj = &rk_obj->base; + struct drm_device *drm = obj->dev; + struct rockchip_drm_private *private = drm->dev_private; + + if (private->domain) + return rockchip_gem_alloc_iommu(rk_obj, alloc_kmap); + else + return rockchip_gem_alloc_dma(rk_obj, alloc_kmap); +} + +static void rockchip_gem_free_iommu(struct rockchip_gem_object *rk_obj) +{ + vunmap(rk_obj->kvaddr); + rockchip_gem_iommu_unmap(rk_obj); + rockchip_gem_put_pages(rk_obj); +} + +static void rockchip_gem_free_dma(struct rockchip_gem_object *rk_obj) +{ + struct drm_gem_object *obj = &rk_obj->base; + struct drm_device *drm = obj->dev; + + dma_free_attrs(drm->dev, obj->size, rk_obj->kvaddr, rk_obj->dma_addr, + rk_obj->dma_attrs); +} + +static void rockchip_gem_free_buf(struct rockchip_gem_object *rk_obj) +{ + if (rk_obj->pages) + rockchip_gem_free_iommu(rk_obj); + else + rockchip_gem_free_dma(rk_obj); +} + +static int rockchip_drm_gem_object_mmap_iommu(struct drm_gem_object *obj, + struct vm_area_struct *vma) +{ + struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj); + unsigned int count = obj->size >> PAGE_SHIFT; + unsigned long user_count = vma_pages(vma); + + if (user_count == 0) + return -ENXIO; + + return vm_map_pages(vma, rk_obj->pages, count); +} + +static int rockchip_drm_gem_object_mmap_dma(struct drm_gem_object *obj, + struct vm_area_struct *vma) +{ + struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj); + struct drm_device *drm = obj->dev; + + return dma_mmap_attrs(drm->dev, vma, rk_obj->kvaddr, rk_obj->dma_addr, + obj->size, rk_obj->dma_attrs); +} + +static int rockchip_drm_gem_object_mmap(struct drm_gem_object *obj, + struct vm_area_struct *vma) +{ + int ret; + struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj); + + /* + * Set vm_pgoff (used as a fake buffer offset by DRM) to 0 and map the + * whole buffer from the start. + */ + vma->vm_pgoff = 0; + + /* + * We allocated a struct page table for rk_obj, so clear + * VM_PFNMAP flag that was set by drm_gem_mmap_obj()/drm_gem_mmap(). + */ + vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP; + vma->vm_flags &= ~VM_PFNMAP; + + vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); + vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot); + + if (rk_obj->pages) + ret = rockchip_drm_gem_object_mmap_iommu(obj, vma); + else + ret = rockchip_drm_gem_object_mmap_dma(obj, vma); + + if (ret) + drm_gem_vm_close(vma); + + return ret; +} + +static void rockchip_gem_release_object(struct rockchip_gem_object *rk_obj) +{ + drm_gem_object_release(&rk_obj->base); + kfree(rk_obj); +} + +static const struct drm_gem_object_funcs rockchip_gem_object_funcs = { + .free = rockchip_gem_free_object, + .get_sg_table = rockchip_gem_prime_get_sg_table, + .vmap = rockchip_gem_prime_vmap, + .vunmap = rockchip_gem_prime_vunmap, + .mmap = rockchip_drm_gem_object_mmap, + .vm_ops = &drm_gem_dma_vm_ops, +}; + +static struct rockchip_gem_object * + rockchip_gem_alloc_object(struct drm_device *drm, unsigned int size) +{ + struct rockchip_gem_object *rk_obj; + struct drm_gem_object *obj; + + size = round_up(size, PAGE_SIZE); + + rk_obj = kzalloc(sizeof(*rk_obj), GFP_KERNEL); + if (!rk_obj) + return ERR_PTR(-ENOMEM); + + obj = &rk_obj->base; + + obj->funcs = &rockchip_gem_object_funcs; + + drm_gem_object_init(drm, obj, size); + + return rk_obj; +} + +struct rockchip_gem_object * +rockchip_gem_create_object(struct drm_device *drm, unsigned int size, + bool alloc_kmap) +{ + struct rockchip_gem_object *rk_obj; + int ret; + + rk_obj = rockchip_gem_alloc_object(drm, size); + if (IS_ERR(rk_obj)) + return rk_obj; + + ret = rockchip_gem_alloc_buf(rk_obj, alloc_kmap); + if (ret) + goto err_free_rk_obj; + + return rk_obj; + +err_free_rk_obj: + rockchip_gem_release_object(rk_obj); + return ERR_PTR(ret); +} + +/* + * rockchip_gem_free_object - (struct drm_gem_object_funcs)->free + * callback function + */ +void rockchip_gem_free_object(struct drm_gem_object *obj) +{ + struct drm_device *drm = obj->dev; + struct rockchip_drm_private *private = drm->dev_private; + struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj); + + if (obj->import_attach) { + if (private->domain) { + rockchip_gem_iommu_unmap(rk_obj); + } else { + dma_unmap_sgtable(drm->dev, rk_obj->sgt, + DMA_BIDIRECTIONAL, 0); + } + drm_prime_gem_destroy(obj, rk_obj->sgt); + } else { + rockchip_gem_free_buf(rk_obj); + } + + rockchip_gem_release_object(rk_obj); +} + +/* + * rockchip_gem_create_with_handle - allocate an object with the given + * size and create a gem handle on it + * + * returns a struct rockchip_gem_object* on success or ERR_PTR values + * on failure. + */ +static struct rockchip_gem_object * +rockchip_gem_create_with_handle(struct drm_file *file_priv, + struct drm_device *drm, unsigned int size, + unsigned int *handle) +{ + struct rockchip_gem_object *rk_obj; + struct drm_gem_object *obj; + bool is_framebuffer; + int ret; + + is_framebuffer = drm->fb_helper && file_priv == drm->fb_helper->client.file; + + rk_obj = rockchip_gem_create_object(drm, size, is_framebuffer); + if (IS_ERR(rk_obj)) + return ERR_CAST(rk_obj); + + obj = &rk_obj->base; + + /* + * allocate a id of idr table where the obj is registered + * and handle has the id what user can see. + */ + ret = drm_gem_handle_create(file_priv, obj, handle); + if (ret) + goto err_handle_create; + + /* drop reference from allocate - handle holds it now. */ + drm_gem_object_put(obj); + + return rk_obj; + +err_handle_create: + rockchip_gem_free_object(obj); + + return ERR_PTR(ret); +} + +/* + * rockchip_gem_dumb_create - (struct drm_driver)->dumb_create callback + * function + * + * This aligns the pitch and size arguments to the minimum required. wrap + * this into your own function if you need bigger alignment. + */ +int rockchip_gem_dumb_create(struct drm_file *file_priv, + struct drm_device *dev, + struct drm_mode_create_dumb *args) +{ + struct rockchip_gem_object *rk_obj; + int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8); + + /* + * align to 64 bytes since Mali requires it. + */ + args->pitch = ALIGN(min_pitch, 64); + args->size = args->pitch * args->height; + + rk_obj = rockchip_gem_create_with_handle(file_priv, dev, args->size, + &args->handle); + + return PTR_ERR_OR_ZERO(rk_obj); +} + +/* + * Allocate a sg_table for this GEM object. + * Note: Both the table's contents, and the sg_table itself must be freed by + * the caller. + * Returns a pointer to the newly allocated sg_table, or an ERR_PTR() error. + */ +struct sg_table *rockchip_gem_prime_get_sg_table(struct drm_gem_object *obj) +{ + struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj); + struct drm_device *drm = obj->dev; + struct sg_table *sgt; + int ret; + + if (rk_obj->pages) + return drm_prime_pages_to_sg(obj->dev, rk_obj->pages, rk_obj->num_pages); + + sgt = kzalloc(sizeof(*sgt), GFP_KERNEL); + if (!sgt) + return ERR_PTR(-ENOMEM); + + ret = dma_get_sgtable_attrs(drm->dev, sgt, rk_obj->kvaddr, + rk_obj->dma_addr, obj->size, + rk_obj->dma_attrs); + if (ret) { + DRM_ERROR("failed to allocate sgt, %d\n", ret); + kfree(sgt); + return ERR_PTR(ret); + } + + return sgt; +} + +static int +rockchip_gem_iommu_map_sg(struct drm_device *drm, + struct dma_buf_attachment *attach, + struct sg_table *sg, + struct rockchip_gem_object *rk_obj) +{ + rk_obj->sgt = sg; + return rockchip_gem_iommu_map(rk_obj); +} + +static int +rockchip_gem_dma_map_sg(struct drm_device *drm, + struct dma_buf_attachment *attach, + struct sg_table *sg, + struct rockchip_gem_object *rk_obj) +{ + int err = dma_map_sgtable(drm->dev, sg, DMA_BIDIRECTIONAL, 0); + if (err) + return err; + + if (drm_prime_get_contiguous_size(sg) < attach->dmabuf->size) { + DRM_ERROR("failed to map sg_table to contiguous linear address.\n"); + dma_unmap_sgtable(drm->dev, sg, DMA_BIDIRECTIONAL, 0); + return -EINVAL; + } + + rk_obj->dma_addr = sg_dma_address(sg->sgl); + rk_obj->sgt = sg; + return 0; +} + +struct drm_gem_object * +rockchip_gem_prime_import_sg_table(struct drm_device *drm, + struct dma_buf_attachment *attach, + struct sg_table *sg) +{ + struct rockchip_drm_private *private = drm->dev_private; + struct rockchip_gem_object *rk_obj; + int ret; + + rk_obj = rockchip_gem_alloc_object(drm, attach->dmabuf->size); + if (IS_ERR(rk_obj)) + return ERR_CAST(rk_obj); + + if (private->domain) + ret = rockchip_gem_iommu_map_sg(drm, attach, sg, rk_obj); + else + ret = rockchip_gem_dma_map_sg(drm, attach, sg, rk_obj); + + if (ret < 0) { + DRM_ERROR("failed to import sg table: %d\n", ret); + goto err_free_rk_obj; + } + + return &rk_obj->base; + +err_free_rk_obj: + rockchip_gem_release_object(rk_obj); + return ERR_PTR(ret); +} + +int rockchip_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map) +{ + struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj); + + if (rk_obj->pages) { + void *vaddr = vmap(rk_obj->pages, rk_obj->num_pages, VM_MAP, + pgprot_writecombine(PAGE_KERNEL)); + if (!vaddr) + return -ENOMEM; + iosys_map_set_vaddr(map, vaddr); + return 0; + } + + if (rk_obj->dma_attrs & DMA_ATTR_NO_KERNEL_MAPPING) + return -ENOMEM; + iosys_map_set_vaddr(map, rk_obj->kvaddr); + + return 0; +} + +void rockchip_gem_prime_vunmap(struct drm_gem_object *obj, + struct iosys_map *map) +{ + struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj); + + if (rk_obj->pages) { + vunmap(map->vaddr); + return; + } + + /* Nothing to do if allocated by DMA mapping API. */ +} -- cgit v1.2.3