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/crypto/ccree/cc_request_mgr.c | 662 ++++++++++++++++++++++++++++++++++ 1 file changed, 662 insertions(+) create mode 100644 drivers/crypto/ccree/cc_request_mgr.c (limited to 'drivers/crypto/ccree/cc_request_mgr.c') diff --git a/drivers/crypto/ccree/cc_request_mgr.c b/drivers/crypto/ccree/cc_request_mgr.c new file mode 100644 index 000000000..887162df5 --- /dev/null +++ b/drivers/crypto/ccree/cc_request_mgr.c @@ -0,0 +1,662 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (C) 2012-2019 ARM Limited (or its affiliates). */ + +#include +#include +#include "cc_driver.h" +#include "cc_buffer_mgr.h" +#include "cc_request_mgr.h" +#include "cc_pm.h" + +#define CC_MAX_POLL_ITER 10 +/* The highest descriptor count in used */ +#define CC_MAX_DESC_SEQ_LEN 23 + +struct cc_req_mgr_handle { + /* Request manager resources */ + unsigned int hw_queue_size; /* HW capability */ + unsigned int min_free_hw_slots; + unsigned int max_used_sw_slots; + struct cc_crypto_req req_queue[MAX_REQUEST_QUEUE_SIZE]; + u32 req_queue_head; + u32 req_queue_tail; + u32 axi_completed; + u32 q_free_slots; + /* This lock protects access to HW register + * that must be single request at a time + */ + spinlock_t hw_lock; + struct cc_hw_desc compl_desc; + u8 *dummy_comp_buff; + dma_addr_t dummy_comp_buff_dma; + + /* backlog queue */ + struct list_head backlog; + unsigned int bl_len; + spinlock_t bl_lock; /* protect backlog queue */ + +#ifdef COMP_IN_WQ + struct workqueue_struct *workq; + struct delayed_work compwork; +#else + struct tasklet_struct comptask; +#endif +}; + +struct cc_bl_item { + struct cc_crypto_req creq; + struct cc_hw_desc desc[CC_MAX_DESC_SEQ_LEN]; + unsigned int len; + struct list_head list; + bool notif; +}; + +static const u32 cc_cpp_int_masks[CC_CPP_NUM_ALGS][CC_CPP_NUM_SLOTS] = { + { BIT(CC_HOST_IRR_REE_OP_ABORTED_AES_0_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_AES_1_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_AES_2_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_AES_3_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_AES_4_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_AES_5_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_AES_6_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_AES_7_INT_BIT_SHIFT) }, + { BIT(CC_HOST_IRR_REE_OP_ABORTED_SM_0_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_SM_1_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_SM_2_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_SM_3_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_SM_4_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_SM_5_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_SM_6_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_SM_7_INT_BIT_SHIFT) } +}; + +static void comp_handler(unsigned long devarg); +#ifdef COMP_IN_WQ +static void comp_work_handler(struct work_struct *work); +#endif + +static inline u32 cc_cpp_int_mask(enum cc_cpp_alg alg, int slot) +{ + alg = array_index_nospec(alg, CC_CPP_NUM_ALGS); + slot = array_index_nospec(slot, CC_CPP_NUM_SLOTS); + + return cc_cpp_int_masks[alg][slot]; +} + +void cc_req_mgr_fini(struct cc_drvdata *drvdata) +{ + struct cc_req_mgr_handle *req_mgr_h = drvdata->request_mgr_handle; + struct device *dev = drvdata_to_dev(drvdata); + + if (!req_mgr_h) + return; /* Not allocated */ + + if (req_mgr_h->dummy_comp_buff_dma) { + dma_free_coherent(dev, sizeof(u32), req_mgr_h->dummy_comp_buff, + req_mgr_h->dummy_comp_buff_dma); + } + + dev_dbg(dev, "max_used_hw_slots=%d\n", (req_mgr_h->hw_queue_size - + req_mgr_h->min_free_hw_slots)); + dev_dbg(dev, "max_used_sw_slots=%d\n", req_mgr_h->max_used_sw_slots); + +#ifdef COMP_IN_WQ + destroy_workqueue(req_mgr_h->workq); +#else + /* Kill tasklet */ + tasklet_kill(&req_mgr_h->comptask); +#endif + kfree_sensitive(req_mgr_h); + drvdata->request_mgr_handle = NULL; +} + +int cc_req_mgr_init(struct cc_drvdata *drvdata) +{ + struct cc_req_mgr_handle *req_mgr_h; + struct device *dev = drvdata_to_dev(drvdata); + int rc = 0; + + req_mgr_h = kzalloc(sizeof(*req_mgr_h), GFP_KERNEL); + if (!req_mgr_h) { + rc = -ENOMEM; + goto req_mgr_init_err; + } + + drvdata->request_mgr_handle = req_mgr_h; + + spin_lock_init(&req_mgr_h->hw_lock); + spin_lock_init(&req_mgr_h->bl_lock); + INIT_LIST_HEAD(&req_mgr_h->backlog); + +#ifdef COMP_IN_WQ + dev_dbg(dev, "Initializing completion workqueue\n"); + req_mgr_h->workq = create_singlethread_workqueue("ccree"); + if (!req_mgr_h->workq) { + dev_err(dev, "Failed creating work queue\n"); + rc = -ENOMEM; + goto req_mgr_init_err; + } + INIT_DELAYED_WORK(&req_mgr_h->compwork, comp_work_handler); +#else + dev_dbg(dev, "Initializing completion tasklet\n"); + tasklet_init(&req_mgr_h->comptask, comp_handler, + (unsigned long)drvdata); +#endif + req_mgr_h->hw_queue_size = cc_ioread(drvdata, + CC_REG(DSCRPTR_QUEUE_SRAM_SIZE)); + dev_dbg(dev, "hw_queue_size=0x%08X\n", req_mgr_h->hw_queue_size); + if (req_mgr_h->hw_queue_size < MIN_HW_QUEUE_SIZE) { + dev_err(dev, "Invalid HW queue size = %u (Min. required is %u)\n", + req_mgr_h->hw_queue_size, MIN_HW_QUEUE_SIZE); + rc = -ENOMEM; + goto req_mgr_init_err; + } + req_mgr_h->min_free_hw_slots = req_mgr_h->hw_queue_size; + req_mgr_h->max_used_sw_slots = 0; + + /* Allocate DMA word for "dummy" completion descriptor use */ + req_mgr_h->dummy_comp_buff = + dma_alloc_coherent(dev, sizeof(u32), + &req_mgr_h->dummy_comp_buff_dma, + GFP_KERNEL); + if (!req_mgr_h->dummy_comp_buff) { + dev_err(dev, "Not enough memory to allocate DMA (%zu) dropped buffer\n", + sizeof(u32)); + rc = -ENOMEM; + goto req_mgr_init_err; + } + + /* Init. "dummy" completion descriptor */ + hw_desc_init(&req_mgr_h->compl_desc); + set_din_const(&req_mgr_h->compl_desc, 0, sizeof(u32)); + set_dout_dlli(&req_mgr_h->compl_desc, req_mgr_h->dummy_comp_buff_dma, + sizeof(u32), NS_BIT, 1); + set_flow_mode(&req_mgr_h->compl_desc, BYPASS); + set_queue_last_ind(drvdata, &req_mgr_h->compl_desc); + + return 0; + +req_mgr_init_err: + cc_req_mgr_fini(drvdata); + return rc; +} + +static void enqueue_seq(struct cc_drvdata *drvdata, struct cc_hw_desc seq[], + unsigned int seq_len) +{ + int i, w; + void __iomem *reg = drvdata->cc_base + CC_REG(DSCRPTR_QUEUE_WORD0); + struct device *dev = drvdata_to_dev(drvdata); + + /* + * We do indeed write all 6 command words to the same + * register. The HW supports this. + */ + + for (i = 0; i < seq_len; i++) { + for (w = 0; w <= 5; w++) + writel_relaxed(seq[i].word[w], reg); + + if (cc_dump_desc) + dev_dbg(dev, "desc[%02d]: 0x%08X 0x%08X 0x%08X 0x%08X 0x%08X 0x%08X\n", + i, seq[i].word[0], seq[i].word[1], + seq[i].word[2], seq[i].word[3], + seq[i].word[4], seq[i].word[5]); + } +} + +/** + * request_mgr_complete() - Completion will take place if and only if user + * requested completion by cc_send_sync_request(). + * + * @dev: Device pointer + * @dx_compl_h: The completion event to signal + * @dummy: unused error code + */ +static void request_mgr_complete(struct device *dev, void *dx_compl_h, + int dummy) +{ + struct completion *this_compl = dx_compl_h; + + complete(this_compl); +} + +static int cc_queues_status(struct cc_drvdata *drvdata, + struct cc_req_mgr_handle *req_mgr_h, + unsigned int total_seq_len) +{ + unsigned long poll_queue; + struct device *dev = drvdata_to_dev(drvdata); + + /* SW queue is checked only once as it will not + * be changed during the poll because the spinlock_bh + * is held by the thread + */ + if (((req_mgr_h->req_queue_head + 1) & (MAX_REQUEST_QUEUE_SIZE - 1)) == + req_mgr_h->req_queue_tail) { + dev_err(dev, "SW FIFO is full. req_queue_head=%d sw_fifo_len=%d\n", + req_mgr_h->req_queue_head, MAX_REQUEST_QUEUE_SIZE); + return -ENOSPC; + } + + if (req_mgr_h->q_free_slots >= total_seq_len) + return 0; + + /* Wait for space in HW queue. Poll constant num of iterations. */ + for (poll_queue = 0; poll_queue < CC_MAX_POLL_ITER ; poll_queue++) { + req_mgr_h->q_free_slots = + cc_ioread(drvdata, CC_REG(DSCRPTR_QUEUE_CONTENT)); + if (req_mgr_h->q_free_slots < req_mgr_h->min_free_hw_slots) + req_mgr_h->min_free_hw_slots = req_mgr_h->q_free_slots; + + if (req_mgr_h->q_free_slots >= total_seq_len) { + /* If there is enough place return */ + return 0; + } + + dev_dbg(dev, "HW FIFO is full. q_free_slots=%d total_seq_len=%d\n", + req_mgr_h->q_free_slots, total_seq_len); + } + /* No room in the HW queue try again later */ + dev_dbg(dev, "HW FIFO full, timeout. req_queue_head=%d sw_fifo_len=%d q_free_slots=%d total_seq_len=%d\n", + req_mgr_h->req_queue_head, MAX_REQUEST_QUEUE_SIZE, + req_mgr_h->q_free_slots, total_seq_len); + return -ENOSPC; +} + +/** + * cc_do_send_request() - Enqueue caller request to crypto hardware. + * Need to be called with HW lock held and PM running + * + * @drvdata: Associated device driver context + * @cc_req: The request to enqueue + * @desc: The crypto sequence + * @len: The crypto sequence length + * @add_comp: If "true": add an artificial dout DMA to mark completion + * + */ +static void cc_do_send_request(struct cc_drvdata *drvdata, + struct cc_crypto_req *cc_req, + struct cc_hw_desc *desc, unsigned int len, + bool add_comp) +{ + struct cc_req_mgr_handle *req_mgr_h = drvdata->request_mgr_handle; + unsigned int used_sw_slots; + unsigned int total_seq_len = len; /*initial sequence length*/ + struct device *dev = drvdata_to_dev(drvdata); + + used_sw_slots = ((req_mgr_h->req_queue_head - + req_mgr_h->req_queue_tail) & + (MAX_REQUEST_QUEUE_SIZE - 1)); + if (used_sw_slots > req_mgr_h->max_used_sw_slots) + req_mgr_h->max_used_sw_slots = used_sw_slots; + + /* Enqueue request - must be locked with HW lock*/ + req_mgr_h->req_queue[req_mgr_h->req_queue_head] = *cc_req; + req_mgr_h->req_queue_head = (req_mgr_h->req_queue_head + 1) & + (MAX_REQUEST_QUEUE_SIZE - 1); + + dev_dbg(dev, "Enqueue request head=%u\n", req_mgr_h->req_queue_head); + + /* + * We are about to push command to the HW via the command registers + * that may reference host memory. We need to issue a memory barrier + * to make sure there are no outstanding memory writes + */ + wmb(); + + /* STAT_PHASE_4: Push sequence */ + + enqueue_seq(drvdata, desc, len); + + if (add_comp) { + enqueue_seq(drvdata, &req_mgr_h->compl_desc, 1); + total_seq_len++; + } + + if (req_mgr_h->q_free_slots < total_seq_len) { + /* This situation should never occur. Maybe indicating problem + * with resuming power. Set the free slot count to 0 and hope + * for the best. + */ + dev_err(dev, "HW free slot count mismatch."); + req_mgr_h->q_free_slots = 0; + } else { + /* Update the free slots in HW queue */ + req_mgr_h->q_free_slots -= total_seq_len; + } +} + +static void cc_enqueue_backlog(struct cc_drvdata *drvdata, + struct cc_bl_item *bli) +{ + struct cc_req_mgr_handle *mgr = drvdata->request_mgr_handle; + struct device *dev = drvdata_to_dev(drvdata); + + spin_lock_bh(&mgr->bl_lock); + list_add_tail(&bli->list, &mgr->backlog); + ++mgr->bl_len; + dev_dbg(dev, "+++bl len: %d\n", mgr->bl_len); + spin_unlock_bh(&mgr->bl_lock); + tasklet_schedule(&mgr->comptask); +} + +static void cc_proc_backlog(struct cc_drvdata *drvdata) +{ + struct cc_req_mgr_handle *mgr = drvdata->request_mgr_handle; + struct cc_bl_item *bli; + struct cc_crypto_req *creq; + void *req; + struct device *dev = drvdata_to_dev(drvdata); + int rc; + + spin_lock(&mgr->bl_lock); + + while (mgr->bl_len) { + bli = list_first_entry(&mgr->backlog, struct cc_bl_item, list); + dev_dbg(dev, "---bl len: %d\n", mgr->bl_len); + + spin_unlock(&mgr->bl_lock); + + + creq = &bli->creq; + req = creq->user_arg; + + /* + * Notify the request we're moving out of the backlog + * but only if we haven't done so already. + */ + if (!bli->notif) { + creq->user_cb(dev, req, -EINPROGRESS); + bli->notif = true; + } + + spin_lock(&mgr->hw_lock); + + rc = cc_queues_status(drvdata, mgr, bli->len); + if (rc) { + /* + * There is still no room in the FIFO for + * this request. Bail out. We'll return here + * on the next completion irq. + */ + spin_unlock(&mgr->hw_lock); + return; + } + + cc_do_send_request(drvdata, &bli->creq, bli->desc, bli->len, + false); + spin_unlock(&mgr->hw_lock); + + /* Remove ourselves from the backlog list */ + spin_lock(&mgr->bl_lock); + list_del(&bli->list); + --mgr->bl_len; + kfree(bli); + } + + spin_unlock(&mgr->bl_lock); +} + +int cc_send_request(struct cc_drvdata *drvdata, struct cc_crypto_req *cc_req, + struct cc_hw_desc *desc, unsigned int len, + struct crypto_async_request *req) +{ + int rc; + struct cc_req_mgr_handle *mgr = drvdata->request_mgr_handle; + struct device *dev = drvdata_to_dev(drvdata); + bool backlog_ok = req->flags & CRYPTO_TFM_REQ_MAY_BACKLOG; + gfp_t flags = cc_gfp_flags(req); + struct cc_bl_item *bli; + + rc = cc_pm_get(dev); + if (rc) { + dev_err(dev, "cc_pm_get returned %x\n", rc); + return rc; + } + + spin_lock_bh(&mgr->hw_lock); + rc = cc_queues_status(drvdata, mgr, len); + +#ifdef CC_DEBUG_FORCE_BACKLOG + if (backlog_ok) + rc = -ENOSPC; +#endif /* CC_DEBUG_FORCE_BACKLOG */ + + if (rc == -ENOSPC && backlog_ok) { + spin_unlock_bh(&mgr->hw_lock); + + bli = kmalloc(sizeof(*bli), flags); + if (!bli) { + cc_pm_put_suspend(dev); + return -ENOMEM; + } + + memcpy(&bli->creq, cc_req, sizeof(*cc_req)); + memcpy(&bli->desc, desc, len * sizeof(*desc)); + bli->len = len; + bli->notif = false; + cc_enqueue_backlog(drvdata, bli); + return -EBUSY; + } + + if (!rc) { + cc_do_send_request(drvdata, cc_req, desc, len, false); + rc = -EINPROGRESS; + } + + spin_unlock_bh(&mgr->hw_lock); + return rc; +} + +int cc_send_sync_request(struct cc_drvdata *drvdata, + struct cc_crypto_req *cc_req, struct cc_hw_desc *desc, + unsigned int len) +{ + int rc; + struct device *dev = drvdata_to_dev(drvdata); + struct cc_req_mgr_handle *mgr = drvdata->request_mgr_handle; + + init_completion(&cc_req->seq_compl); + cc_req->user_cb = request_mgr_complete; + cc_req->user_arg = &cc_req->seq_compl; + + rc = cc_pm_get(dev); + if (rc) { + dev_err(dev, "cc_pm_get returned %x\n", rc); + return rc; + } + + while (true) { + spin_lock_bh(&mgr->hw_lock); + rc = cc_queues_status(drvdata, mgr, len + 1); + + if (!rc) + break; + + spin_unlock_bh(&mgr->hw_lock); + wait_for_completion_interruptible(&drvdata->hw_queue_avail); + reinit_completion(&drvdata->hw_queue_avail); + } + + cc_do_send_request(drvdata, cc_req, desc, len, true); + spin_unlock_bh(&mgr->hw_lock); + wait_for_completion(&cc_req->seq_compl); + return 0; +} + +/** + * send_request_init() - Enqueue caller request to crypto hardware during init + * process. + * Assume this function is not called in the middle of a flow, + * since we set QUEUE_LAST_IND flag in the last descriptor. + * + * @drvdata: Associated device driver context + * @desc: The crypto sequence + * @len: The crypto sequence length + * + * Return: + * Returns "0" upon success + */ +int send_request_init(struct cc_drvdata *drvdata, struct cc_hw_desc *desc, + unsigned int len) +{ + struct cc_req_mgr_handle *req_mgr_h = drvdata->request_mgr_handle; + unsigned int total_seq_len = len; /*initial sequence length*/ + int rc = 0; + + /* Wait for space in HW and SW FIFO. Poll for as much as FIFO_TIMEOUT. + */ + rc = cc_queues_status(drvdata, req_mgr_h, total_seq_len); + if (rc) + return rc; + + set_queue_last_ind(drvdata, &desc[(len - 1)]); + + /* + * We are about to push command to the HW via the command registers + * that may reference host memory. We need to issue a memory barrier + * to make sure there are no outstanding memory writes + */ + wmb(); + enqueue_seq(drvdata, desc, len); + + /* Update the free slots in HW queue */ + req_mgr_h->q_free_slots = + cc_ioread(drvdata, CC_REG(DSCRPTR_QUEUE_CONTENT)); + + return 0; +} + +void complete_request(struct cc_drvdata *drvdata) +{ + struct cc_req_mgr_handle *request_mgr_handle = + drvdata->request_mgr_handle; + + complete(&drvdata->hw_queue_avail); +#ifdef COMP_IN_WQ + queue_delayed_work(request_mgr_handle->workq, + &request_mgr_handle->compwork, 0); +#else + tasklet_schedule(&request_mgr_handle->comptask); +#endif +} + +#ifdef COMP_IN_WQ +static void comp_work_handler(struct work_struct *work) +{ + struct cc_drvdata *drvdata = + container_of(work, struct cc_drvdata, compwork.work); + + comp_handler((unsigned long)drvdata); +} +#endif + +static void proc_completions(struct cc_drvdata *drvdata) +{ + struct cc_crypto_req *cc_req; + struct device *dev = drvdata_to_dev(drvdata); + struct cc_req_mgr_handle *request_mgr_handle = + drvdata->request_mgr_handle; + unsigned int *tail = &request_mgr_handle->req_queue_tail; + unsigned int *head = &request_mgr_handle->req_queue_head; + int rc; + u32 mask; + + while (request_mgr_handle->axi_completed) { + request_mgr_handle->axi_completed--; + + /* Dequeue request */ + if (*head == *tail) { + /* We are supposed to handle a completion but our + * queue is empty. This is not normal. Return and + * hope for the best. + */ + dev_err(dev, "Request queue is empty head == tail %u\n", + *head); + break; + } + + cc_req = &request_mgr_handle->req_queue[*tail]; + + if (cc_req->cpp.is_cpp) { + + dev_dbg(dev, "CPP request completion slot: %d alg:%d\n", + cc_req->cpp.slot, cc_req->cpp.alg); + mask = cc_cpp_int_mask(cc_req->cpp.alg, + cc_req->cpp.slot); + rc = (drvdata->irq & mask ? -EPERM : 0); + dev_dbg(dev, "Got mask: %x irq: %x rc: %d\n", mask, + drvdata->irq, rc); + } else { + dev_dbg(dev, "None CPP request completion\n"); + rc = 0; + } + + if (cc_req->user_cb) + cc_req->user_cb(dev, cc_req->user_arg, rc); + *tail = (*tail + 1) & (MAX_REQUEST_QUEUE_SIZE - 1); + dev_dbg(dev, "Dequeue request tail=%u\n", *tail); + dev_dbg(dev, "Request completed. axi_completed=%d\n", + request_mgr_handle->axi_completed); + cc_pm_put_suspend(dev); + } +} + +static inline u32 cc_axi_comp_count(struct cc_drvdata *drvdata) +{ + return FIELD_GET(AXIM_MON_COMP_VALUE, + cc_ioread(drvdata, drvdata->axim_mon_offset)); +} + +/* Deferred service handler, run as interrupt-fired tasklet */ +static void comp_handler(unsigned long devarg) +{ + struct cc_drvdata *drvdata = (struct cc_drvdata *)devarg; + struct cc_req_mgr_handle *request_mgr_handle = + drvdata->request_mgr_handle; + struct device *dev = drvdata_to_dev(drvdata); + u32 irq; + + dev_dbg(dev, "Completion handler called!\n"); + irq = (drvdata->irq & drvdata->comp_mask); + + /* To avoid the interrupt from firing as we unmask it, + * we clear it now + */ + cc_iowrite(drvdata, CC_REG(HOST_ICR), irq); + + /* Avoid race with above clear: Test completion counter once more */ + + request_mgr_handle->axi_completed += cc_axi_comp_count(drvdata); + + dev_dbg(dev, "AXI completion after updated: %d\n", + request_mgr_handle->axi_completed); + + while (request_mgr_handle->axi_completed) { + do { + drvdata->irq |= cc_ioread(drvdata, CC_REG(HOST_IRR)); + irq = (drvdata->irq & drvdata->comp_mask); + proc_completions(drvdata); + + /* At this point (after proc_completions()), + * request_mgr_handle->axi_completed is 0. + */ + request_mgr_handle->axi_completed += + cc_axi_comp_count(drvdata); + } while (request_mgr_handle->axi_completed > 0); + + cc_iowrite(drvdata, CC_REG(HOST_ICR), irq); + + request_mgr_handle->axi_completed += cc_axi_comp_count(drvdata); + } + + /* after verifying that there is nothing to do, + * unmask AXI completion interrupt + */ + cc_iowrite(drvdata, CC_REG(HOST_IMR), + cc_ioread(drvdata, CC_REG(HOST_IMR)) & ~drvdata->comp_mask); + + cc_proc_backlog(drvdata); + dev_dbg(dev, "Comp. handler done.\n"); +} -- cgit v1.2.3