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(). ... --- lib/devres.c | 602 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 602 insertions(+) create mode 100644 lib/devres.c (limited to 'lib/devres.c') diff --git a/lib/devres.c b/lib/devres.c new file mode 100644 index 000000000..6baf43902 --- /dev/null +++ b/lib/devres.c @@ -0,0 +1,602 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include +#include +#include + +enum devm_ioremap_type { + DEVM_IOREMAP = 0, + DEVM_IOREMAP_UC, + DEVM_IOREMAP_WC, + DEVM_IOREMAP_NP, +}; + +void devm_ioremap_release(struct device *dev, void *res) +{ + iounmap(*(void __iomem **)res); +} + +static int devm_ioremap_match(struct device *dev, void *res, void *match_data) +{ + return *(void **)res == match_data; +} + +static void __iomem *__devm_ioremap(struct device *dev, resource_size_t offset, + resource_size_t size, + enum devm_ioremap_type type) +{ + void __iomem **ptr, *addr = NULL; + + ptr = devres_alloc_node(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL, + dev_to_node(dev)); + if (!ptr) + return NULL; + + switch (type) { + case DEVM_IOREMAP: + addr = ioremap(offset, size); + break; + case DEVM_IOREMAP_UC: + addr = ioremap_uc(offset, size); + break; + case DEVM_IOREMAP_WC: + addr = ioremap_wc(offset, size); + break; + case DEVM_IOREMAP_NP: + addr = ioremap_np(offset, size); + break; + } + + if (addr) { + *ptr = addr; + devres_add(dev, ptr); + } else + devres_free(ptr); + + return addr; +} + +/** + * devm_ioremap - Managed ioremap() + * @dev: Generic device to remap IO address for + * @offset: Resource address to map + * @size: Size of map + * + * Managed ioremap(). Map is automatically unmapped on driver detach. + */ +void __iomem *devm_ioremap(struct device *dev, resource_size_t offset, + resource_size_t size) +{ + return __devm_ioremap(dev, offset, size, DEVM_IOREMAP); +} +EXPORT_SYMBOL(devm_ioremap); + +/** + * devm_ioremap_uc - Managed ioremap_uc() + * @dev: Generic device to remap IO address for + * @offset: Resource address to map + * @size: Size of map + * + * Managed ioremap_uc(). Map is automatically unmapped on driver detach. + */ +void __iomem *devm_ioremap_uc(struct device *dev, resource_size_t offset, + resource_size_t size) +{ + return __devm_ioremap(dev, offset, size, DEVM_IOREMAP_UC); +} +EXPORT_SYMBOL_GPL(devm_ioremap_uc); + +/** + * devm_ioremap_wc - Managed ioremap_wc() + * @dev: Generic device to remap IO address for + * @offset: Resource address to map + * @size: Size of map + * + * Managed ioremap_wc(). Map is automatically unmapped on driver detach. + */ +void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset, + resource_size_t size) +{ + return __devm_ioremap(dev, offset, size, DEVM_IOREMAP_WC); +} +EXPORT_SYMBOL(devm_ioremap_wc); + +/** + * devm_iounmap - Managed iounmap() + * @dev: Generic device to unmap for + * @addr: Address to unmap + * + * Managed iounmap(). @addr must have been mapped using devm_ioremap*(). + */ +void devm_iounmap(struct device *dev, void __iomem *addr) +{ + WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match, + (__force void *)addr)); + iounmap(addr); +} +EXPORT_SYMBOL(devm_iounmap); + +static void __iomem * +__devm_ioremap_resource(struct device *dev, const struct resource *res, + enum devm_ioremap_type type) +{ + resource_size_t size; + void __iomem *dest_ptr; + char *pretty_name; + + BUG_ON(!dev); + + if (!res || resource_type(res) != IORESOURCE_MEM) { + dev_err(dev, "invalid resource\n"); + return IOMEM_ERR_PTR(-EINVAL); + } + + if (type == DEVM_IOREMAP && res->flags & IORESOURCE_MEM_NONPOSTED) + type = DEVM_IOREMAP_NP; + + size = resource_size(res); + + if (res->name) + pretty_name = devm_kasprintf(dev, GFP_KERNEL, "%s %s", + dev_name(dev), res->name); + else + pretty_name = devm_kstrdup(dev, dev_name(dev), GFP_KERNEL); + if (!pretty_name) { + dev_err(dev, "can't generate pretty name for resource %pR\n", res); + return IOMEM_ERR_PTR(-ENOMEM); + } + + if (!devm_request_mem_region(dev, res->start, size, pretty_name)) { + dev_err(dev, "can't request region for resource %pR\n", res); + return IOMEM_ERR_PTR(-EBUSY); + } + + dest_ptr = __devm_ioremap(dev, res->start, size, type); + if (!dest_ptr) { + dev_err(dev, "ioremap failed for resource %pR\n", res); + devm_release_mem_region(dev, res->start, size); + dest_ptr = IOMEM_ERR_PTR(-ENOMEM); + } + + return dest_ptr; +} + +/** + * devm_ioremap_resource() - check, request region, and ioremap resource + * @dev: generic device to handle the resource for + * @res: resource to be handled + * + * Checks that a resource is a valid memory region, requests the memory + * region and ioremaps it. All operations are managed and will be undone + * on driver detach. + * + * Usage example: + * + * res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + * base = devm_ioremap_resource(&pdev->dev, res); + * if (IS_ERR(base)) + * return PTR_ERR(base); + * + * Return: a pointer to the remapped memory or an ERR_PTR() encoded error code + * on failure. + */ +void __iomem *devm_ioremap_resource(struct device *dev, + const struct resource *res) +{ + return __devm_ioremap_resource(dev, res, DEVM_IOREMAP); +} +EXPORT_SYMBOL(devm_ioremap_resource); + +/** + * devm_ioremap_resource_wc() - write-combined variant of + * devm_ioremap_resource() + * @dev: generic device to handle the resource for + * @res: resource to be handled + * + * Return: a pointer to the remapped memory or an ERR_PTR() encoded error code + * on failure. + */ +void __iomem *devm_ioremap_resource_wc(struct device *dev, + const struct resource *res) +{ + return __devm_ioremap_resource(dev, res, DEVM_IOREMAP_WC); +} + +/* + * devm_of_iomap - Requests a resource and maps the memory mapped IO + * for a given device_node managed by a given device + * + * Checks that a resource is a valid memory region, requests the memory + * region and ioremaps it. All operations are managed and will be undone + * on driver detach of the device. + * + * This is to be used when a device requests/maps resources described + * by other device tree nodes (children or otherwise). + * + * @dev: The device "managing" the resource + * @node: The device-tree node where the resource resides + * @index: index of the MMIO range in the "reg" property + * @size: Returns the size of the resource (pass NULL if not needed) + * + * Usage example: + * + * base = devm_of_iomap(&pdev->dev, node, 0, NULL); + * if (IS_ERR(base)) + * return PTR_ERR(base); + * + * Please Note: This is not a one-to-one replacement for of_iomap() because the + * of_iomap() function does not track whether the region is already mapped. If + * two drivers try to map the same memory, the of_iomap() function will succeed + * but the devm_of_iomap() function will return -EBUSY. + * + * Return: a pointer to the requested and mapped memory or an ERR_PTR() encoded + * error code on failure. + */ +void __iomem *devm_of_iomap(struct device *dev, struct device_node *node, int index, + resource_size_t *size) +{ + struct resource res; + + if (of_address_to_resource(node, index, &res)) + return IOMEM_ERR_PTR(-EINVAL); + if (size) + *size = resource_size(&res); + return devm_ioremap_resource(dev, &res); +} +EXPORT_SYMBOL(devm_of_iomap); + +#ifdef CONFIG_HAS_IOPORT_MAP +/* + * Generic iomap devres + */ +static void devm_ioport_map_release(struct device *dev, void *res) +{ + ioport_unmap(*(void __iomem **)res); +} + +static int devm_ioport_map_match(struct device *dev, void *res, + void *match_data) +{ + return *(void **)res == match_data; +} + +/** + * devm_ioport_map - Managed ioport_map() + * @dev: Generic device to map ioport for + * @port: Port to map + * @nr: Number of ports to map + * + * Managed ioport_map(). Map is automatically unmapped on driver + * detach. + * + * Return: a pointer to the remapped memory or NULL on failure. + */ +void __iomem *devm_ioport_map(struct device *dev, unsigned long port, + unsigned int nr) +{ + void __iomem **ptr, *addr; + + ptr = devres_alloc_node(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL, + dev_to_node(dev)); + if (!ptr) + return NULL; + + addr = ioport_map(port, nr); + if (addr) { + *ptr = addr; + devres_add(dev, ptr); + } else + devres_free(ptr); + + return addr; +} +EXPORT_SYMBOL(devm_ioport_map); + +/** + * devm_ioport_unmap - Managed ioport_unmap() + * @dev: Generic device to unmap for + * @addr: Address to unmap + * + * Managed ioport_unmap(). @addr must have been mapped using + * devm_ioport_map(). + */ +void devm_ioport_unmap(struct device *dev, void __iomem *addr) +{ + ioport_unmap(addr); + WARN_ON(devres_destroy(dev, devm_ioport_map_release, + devm_ioport_map_match, (__force void *)addr)); +} +EXPORT_SYMBOL(devm_ioport_unmap); +#endif /* CONFIG_HAS_IOPORT_MAP */ + +#ifdef CONFIG_PCI +/* + * PCI iomap devres + */ +#define PCIM_IOMAP_MAX PCI_STD_NUM_BARS + +struct pcim_iomap_devres { + void __iomem *table[PCIM_IOMAP_MAX]; +}; + +static void pcim_iomap_release(struct device *gendev, void *res) +{ + struct pci_dev *dev = to_pci_dev(gendev); + struct pcim_iomap_devres *this = res; + int i; + + for (i = 0; i < PCIM_IOMAP_MAX; i++) + if (this->table[i]) + pci_iounmap(dev, this->table[i]); +} + +/** + * pcim_iomap_table - access iomap allocation table + * @pdev: PCI device to access iomap table for + * + * Access iomap allocation table for @dev. If iomap table doesn't + * exist and @pdev is managed, it will be allocated. All iomaps + * recorded in the iomap table are automatically unmapped on driver + * detach. + * + * This function might sleep when the table is first allocated but can + * be safely called without context and guaranteed to succeed once + * allocated. + */ +void __iomem * const *pcim_iomap_table(struct pci_dev *pdev) +{ + struct pcim_iomap_devres *dr, *new_dr; + + dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL); + if (dr) + return dr->table; + + new_dr = devres_alloc_node(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL, + dev_to_node(&pdev->dev)); + if (!new_dr) + return NULL; + dr = devres_get(&pdev->dev, new_dr, NULL, NULL); + return dr->table; +} +EXPORT_SYMBOL(pcim_iomap_table); + +/** + * pcim_iomap - Managed pcim_iomap() + * @pdev: PCI device to iomap for + * @bar: BAR to iomap + * @maxlen: Maximum length of iomap + * + * Managed pci_iomap(). Map is automatically unmapped on driver + * detach. + */ +void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen) +{ + void __iomem **tbl; + + BUG_ON(bar >= PCIM_IOMAP_MAX); + + tbl = (void __iomem **)pcim_iomap_table(pdev); + if (!tbl || tbl[bar]) /* duplicate mappings not allowed */ + return NULL; + + tbl[bar] = pci_iomap(pdev, bar, maxlen); + return tbl[bar]; +} +EXPORT_SYMBOL(pcim_iomap); + +/** + * pcim_iounmap - Managed pci_iounmap() + * @pdev: PCI device to iounmap for + * @addr: Address to unmap + * + * Managed pci_iounmap(). @addr must have been mapped using pcim_iomap(). + */ +void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr) +{ + void __iomem **tbl; + int i; + + pci_iounmap(pdev, addr); + + tbl = (void __iomem **)pcim_iomap_table(pdev); + BUG_ON(!tbl); + + for (i = 0; i < PCIM_IOMAP_MAX; i++) + if (tbl[i] == addr) { + tbl[i] = NULL; + return; + } + WARN_ON(1); +} +EXPORT_SYMBOL(pcim_iounmap); + +/** + * pcim_iomap_regions - Request and iomap PCI BARs + * @pdev: PCI device to map IO resources for + * @mask: Mask of BARs to request and iomap + * @name: Name used when requesting regions + * + * Request and iomap regions specified by @mask. + */ +int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name) +{ + void __iomem * const *iomap; + int i, rc; + + iomap = pcim_iomap_table(pdev); + if (!iomap) + return -ENOMEM; + + for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { + unsigned long len; + + if (!(mask & (1 << i))) + continue; + + rc = -EINVAL; + len = pci_resource_len(pdev, i); + if (!len) + goto err_inval; + + rc = pci_request_region(pdev, i, name); + if (rc) + goto err_inval; + + rc = -ENOMEM; + if (!pcim_iomap(pdev, i, 0)) + goto err_region; + } + + return 0; + + err_region: + pci_release_region(pdev, i); + err_inval: + while (--i >= 0) { + if (!(mask & (1 << i))) + continue; + pcim_iounmap(pdev, iomap[i]); + pci_release_region(pdev, i); + } + + return rc; +} +EXPORT_SYMBOL(pcim_iomap_regions); + +/** + * pcim_iomap_regions_request_all - Request all BARs and iomap specified ones + * @pdev: PCI device to map IO resources for + * @mask: Mask of BARs to iomap + * @name: Name used when requesting regions + * + * Request all PCI BARs and iomap regions specified by @mask. + */ +int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask, + const char *name) +{ + int request_mask = ((1 << 6) - 1) & ~mask; + int rc; + + rc = pci_request_selected_regions(pdev, request_mask, name); + if (rc) + return rc; + + rc = pcim_iomap_regions(pdev, mask, name); + if (rc) + pci_release_selected_regions(pdev, request_mask); + return rc; +} +EXPORT_SYMBOL(pcim_iomap_regions_request_all); + +/** + * pcim_iounmap_regions - Unmap and release PCI BARs + * @pdev: PCI device to map IO resources for + * @mask: Mask of BARs to unmap and release + * + * Unmap and release regions specified by @mask. + */ +void pcim_iounmap_regions(struct pci_dev *pdev, int mask) +{ + void __iomem * const *iomap; + int i; + + iomap = pcim_iomap_table(pdev); + if (!iomap) + return; + + for (i = 0; i < PCIM_IOMAP_MAX; i++) { + if (!(mask & (1 << i))) + continue; + + pcim_iounmap(pdev, iomap[i]); + pci_release_region(pdev, i); + } +} +EXPORT_SYMBOL(pcim_iounmap_regions); +#endif /* CONFIG_PCI */ + +static void devm_arch_phys_ac_add_release(struct device *dev, void *res) +{ + arch_phys_wc_del(*((int *)res)); +} + +/** + * devm_arch_phys_wc_add - Managed arch_phys_wc_add() + * @dev: Managed device + * @base: Memory base address + * @size: Size of memory range + * + * Adds a WC MTRR using arch_phys_wc_add() and sets up a release callback. + * See arch_phys_wc_add() for more information. + */ +int devm_arch_phys_wc_add(struct device *dev, unsigned long base, unsigned long size) +{ + int *mtrr; + int ret; + + mtrr = devres_alloc_node(devm_arch_phys_ac_add_release, sizeof(*mtrr), GFP_KERNEL, + dev_to_node(dev)); + if (!mtrr) + return -ENOMEM; + + ret = arch_phys_wc_add(base, size); + if (ret < 0) { + devres_free(mtrr); + return ret; + } + + *mtrr = ret; + devres_add(dev, mtrr); + + return ret; +} +EXPORT_SYMBOL(devm_arch_phys_wc_add); + +struct arch_io_reserve_memtype_wc_devres { + resource_size_t start; + resource_size_t size; +}; + +static void devm_arch_io_free_memtype_wc_release(struct device *dev, void *res) +{ + const struct arch_io_reserve_memtype_wc_devres *this = res; + + arch_io_free_memtype_wc(this->start, this->size); +} + +/** + * devm_arch_io_reserve_memtype_wc - Managed arch_io_reserve_memtype_wc() + * @dev: Managed device + * @start: Memory base address + * @size: Size of memory range + * + * Reserves a memory range with WC caching using arch_io_reserve_memtype_wc() + * and sets up a release callback See arch_io_reserve_memtype_wc() for more + * information. + */ +int devm_arch_io_reserve_memtype_wc(struct device *dev, resource_size_t start, + resource_size_t size) +{ + struct arch_io_reserve_memtype_wc_devres *dr; + int ret; + + dr = devres_alloc_node(devm_arch_io_free_memtype_wc_release, sizeof(*dr), GFP_KERNEL, + dev_to_node(dev)); + if (!dr) + return -ENOMEM; + + ret = arch_io_reserve_memtype_wc(start, size); + if (ret < 0) { + devres_free(dr); + return ret; + } + + dr->start = start; + dr->size = size; + devres_add(dev, dr); + + return ret; +} +EXPORT_SYMBOL(devm_arch_io_reserve_memtype_wc); -- cgit v1.2.3