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/soc/fsl/qbman/qman_test_stash.c | 629 ++++++++++++++++++++++++++++++++ 1 file changed, 629 insertions(+) create mode 100644 drivers/soc/fsl/qbman/qman_test_stash.c (limited to 'drivers/soc/fsl/qbman/qman_test_stash.c') diff --git a/drivers/soc/fsl/qbman/qman_test_stash.c b/drivers/soc/fsl/qbman/qman_test_stash.c new file mode 100644 index 000000000..b7e8e5ec8 --- /dev/null +++ b/drivers/soc/fsl/qbman/qman_test_stash.c @@ -0,0 +1,629 @@ +/* Copyright 2009 - 2016 Freescale Semiconductor, Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of Freescale Semiconductor nor the + * names of its contributors may be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * ALTERNATIVELY, this software may be distributed under the terms of the + * GNU General Public License ("GPL") as published by the Free Software + * Foundation, either version 2 of that License or (at your option) any + * later version. + * + * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "qman_test.h" + +#include +#include + +/* + * Algorithm: + * + * Each cpu will have HP_PER_CPU "handlers" set up, each of which incorporates + * an rx/tx pair of FQ objects (both of which are stashed on dequeue). The + * organisation of FQIDs is such that the HP_PER_CPU*NUM_CPUS handlers will + * shuttle a "hot potato" frame around them such that every forwarding action + * moves it from one cpu to another. (The use of more than one handler per cpu + * is to allow enough handlers/FQs to truly test the significance of caching - + * ie. when cache-expiries are occurring.) + * + * The "hot potato" frame content will be HP_NUM_WORDS*4 bytes in size, and the + * first and last words of the frame data will undergo a transformation step on + * each forwarding action. To achieve this, each handler will be assigned a + * 32-bit "mixer", that is produced using a 32-bit LFSR. When a frame is + * received by a handler, the mixer of the expected sender is XOR'd into all + * words of the entire frame, which is then validated against the original + * values. Then, before forwarding, the entire frame is XOR'd with the mixer of + * the current handler. Apart from validating that the frame is taking the + * expected path, this also provides some quasi-realistic overheads to each + * forwarding action - dereferencing *all* the frame data, computation, and + * conditional branching. There is a "special" handler designated to act as the + * instigator of the test by creating an enqueuing the "hot potato" frame, and + * to determine when the test has completed by counting HP_LOOPS iterations. + * + * Init phases: + * + * 1. prepare each cpu's 'hp_cpu' struct using on_each_cpu(,,1) and link them + * into 'hp_cpu_list'. Specifically, set processor_id, allocate HP_PER_CPU + * handlers and link-list them (but do no other handler setup). + * + * 2. scan over 'hp_cpu_list' HP_PER_CPU times, the first time sets each + * hp_cpu's 'iterator' to point to its first handler. With each loop, + * allocate rx/tx FQIDs and mixer values to the hp_cpu's iterator handler + * and advance the iterator for the next loop. This includes a final fixup, + * which connects the last handler to the first (and which is why phase 2 + * and 3 are separate). + * + * 3. scan over 'hp_cpu_list' HP_PER_CPU times, the first time sets each + * hp_cpu's 'iterator' to point to its first handler. With each loop, + * initialise FQ objects and advance the iterator for the next loop. + * Moreover, do this initialisation on the cpu it applies to so that Rx FQ + * initialisation targets the correct cpu. + */ + +/* + * helper to run something on all cpus (can't use on_each_cpu(), as that invokes + * the fn from irq context, which is too restrictive). + */ +struct bstrap { + int (*fn)(void); + atomic_t started; +}; +static int bstrap_fn(void *bs) +{ + struct bstrap *bstrap = bs; + int err; + + atomic_inc(&bstrap->started); + err = bstrap->fn(); + if (err) + return err; + while (!kthread_should_stop()) + msleep(20); + return 0; +} +static int on_all_cpus(int (*fn)(void)) +{ + int cpu; + + for_each_cpu(cpu, cpu_online_mask) { + struct bstrap bstrap = { + .fn = fn, + .started = ATOMIC_INIT(0) + }; + struct task_struct *k = kthread_create(bstrap_fn, &bstrap, + "hotpotato%d", cpu); + int ret; + + if (IS_ERR(k)) + return -ENOMEM; + kthread_bind(k, cpu); + wake_up_process(k); + /* + * If we call kthread_stop() before the "wake up" has had an + * effect, then the thread may exit with -EINTR without ever + * running the function. So poll until it's started before + * requesting it to stop. + */ + while (!atomic_read(&bstrap.started)) + msleep(20); + ret = kthread_stop(k); + if (ret) + return ret; + } + return 0; +} + +struct hp_handler { + + /* The following data is stashed when 'rx' is dequeued; */ + /* -------------- */ + /* The Rx FQ, dequeues of which will stash the entire hp_handler */ + struct qman_fq rx; + /* The Tx FQ we should forward to */ + struct qman_fq tx; + /* The value we XOR post-dequeue, prior to validating */ + u32 rx_mixer; + /* The value we XOR pre-enqueue, after validating */ + u32 tx_mixer; + /* what the hotpotato address should be on dequeue */ + dma_addr_t addr; + u32 *frame_ptr; + + /* The following data isn't (necessarily) stashed on dequeue; */ + /* -------------- */ + u32 fqid_rx, fqid_tx; + /* list node for linking us into 'hp_cpu' */ + struct list_head node; + /* Just to check ... */ + unsigned int processor_id; +} ____cacheline_aligned; + +struct hp_cpu { + /* identify the cpu we run on; */ + unsigned int processor_id; + /* root node for the per-cpu list of handlers */ + struct list_head handlers; + /* list node for linking us into 'hp_cpu_list' */ + struct list_head node; + /* + * when repeatedly scanning 'hp_list', each time linking the n'th + * handlers together, this is used as per-cpu iterator state + */ + struct hp_handler *iterator; +}; + +/* Each cpu has one of these */ +static DEFINE_PER_CPU(struct hp_cpu, hp_cpus); + +/* links together the hp_cpu structs, in first-come first-serve order. */ +static LIST_HEAD(hp_cpu_list); +static DEFINE_SPINLOCK(hp_lock); + +static unsigned int hp_cpu_list_length; + +/* the "special" handler, that starts and terminates the test. */ +static struct hp_handler *special_handler; +static int loop_counter; + +/* handlers are allocated out of this, so they're properly aligned. */ +static struct kmem_cache *hp_handler_slab; + +/* this is the frame data */ +static void *__frame_ptr; +static u32 *frame_ptr; +static dma_addr_t frame_dma; + +/* needed for dma_map*() */ +static const struct qm_portal_config *pcfg; + +/* the main function waits on this */ +static DECLARE_WAIT_QUEUE_HEAD(queue); + +#define HP_PER_CPU 2 +#define HP_LOOPS 8 +/* 80 bytes, like a small ethernet frame, and bleeds into a second cacheline */ +#define HP_NUM_WORDS 80 +/* First word of the LFSR-based frame data */ +#define HP_FIRST_WORD 0xabbaf00d + +static inline u32 do_lfsr(u32 prev) +{ + return (prev >> 1) ^ (-(prev & 1u) & 0xd0000001u); +} + +static int allocate_frame_data(void) +{ + u32 lfsr = HP_FIRST_WORD; + int loop; + + if (!qman_dma_portal) { + pr_crit("portal not available\n"); + return -EIO; + } + + pcfg = qman_get_qm_portal_config(qman_dma_portal); + + __frame_ptr = kmalloc(4 * HP_NUM_WORDS, GFP_KERNEL); + if (!__frame_ptr) + return -ENOMEM; + + frame_ptr = PTR_ALIGN(__frame_ptr, 64); + for (loop = 0; loop < HP_NUM_WORDS; loop++) { + frame_ptr[loop] = lfsr; + lfsr = do_lfsr(lfsr); + } + + frame_dma = dma_map_single(pcfg->dev, frame_ptr, 4 * HP_NUM_WORDS, + DMA_BIDIRECTIONAL); + if (dma_mapping_error(pcfg->dev, frame_dma)) { + pr_crit("dma mapping failure\n"); + kfree(__frame_ptr); + return -EIO; + } + + return 0; +} + +static void deallocate_frame_data(void) +{ + dma_unmap_single(pcfg->dev, frame_dma, 4 * HP_NUM_WORDS, + DMA_BIDIRECTIONAL); + kfree(__frame_ptr); +} + +static inline int process_frame_data(struct hp_handler *handler, + const struct qm_fd *fd) +{ + u32 *p = handler->frame_ptr; + u32 lfsr = HP_FIRST_WORD; + int loop; + + if (qm_fd_addr_get64(fd) != handler->addr) { + pr_crit("bad frame address, [%llX != %llX]\n", + qm_fd_addr_get64(fd), handler->addr); + return -EIO; + } + for (loop = 0; loop < HP_NUM_WORDS; loop++, p++) { + *p ^= handler->rx_mixer; + if (*p != lfsr) { + pr_crit("corrupt frame data"); + return -EIO; + } + *p ^= handler->tx_mixer; + lfsr = do_lfsr(lfsr); + } + return 0; +} + +static enum qman_cb_dqrr_result normal_dqrr(struct qman_portal *portal, + struct qman_fq *fq, + const struct qm_dqrr_entry *dqrr, + bool sched_napi) +{ + struct hp_handler *handler = (struct hp_handler *)fq; + + if (process_frame_data(handler, &dqrr->fd)) { + WARN_ON(1); + goto skip; + } + if (qman_enqueue(&handler->tx, &dqrr->fd)) { + pr_crit("qman_enqueue() failed"); + WARN_ON(1); + } +skip: + return qman_cb_dqrr_consume; +} + +static enum qman_cb_dqrr_result special_dqrr(struct qman_portal *portal, + struct qman_fq *fq, + const struct qm_dqrr_entry *dqrr, + bool sched_napi) +{ + struct hp_handler *handler = (struct hp_handler *)fq; + + process_frame_data(handler, &dqrr->fd); + if (++loop_counter < HP_LOOPS) { + if (qman_enqueue(&handler->tx, &dqrr->fd)) { + pr_crit("qman_enqueue() failed"); + WARN_ON(1); + goto skip; + } + } else { + pr_info("Received final (%dth) frame\n", loop_counter); + wake_up(&queue); + } +skip: + return qman_cb_dqrr_consume; +} + +static int create_per_cpu_handlers(void) +{ + struct hp_handler *handler; + int loop; + struct hp_cpu *hp_cpu = this_cpu_ptr(&hp_cpus); + + hp_cpu->processor_id = smp_processor_id(); + spin_lock(&hp_lock); + list_add_tail(&hp_cpu->node, &hp_cpu_list); + hp_cpu_list_length++; + spin_unlock(&hp_lock); + INIT_LIST_HEAD(&hp_cpu->handlers); + for (loop = 0; loop < HP_PER_CPU; loop++) { + handler = kmem_cache_alloc(hp_handler_slab, GFP_KERNEL); + if (!handler) { + pr_crit("kmem_cache_alloc() failed"); + WARN_ON(1); + return -EIO; + } + handler->processor_id = hp_cpu->processor_id; + handler->addr = frame_dma; + handler->frame_ptr = frame_ptr; + list_add_tail(&handler->node, &hp_cpu->handlers); + } + return 0; +} + +static int destroy_per_cpu_handlers(void) +{ + struct list_head *loop, *tmp; + struct hp_cpu *hp_cpu = this_cpu_ptr(&hp_cpus); + + spin_lock(&hp_lock); + list_del(&hp_cpu->node); + spin_unlock(&hp_lock); + list_for_each_safe(loop, tmp, &hp_cpu->handlers) { + u32 flags = 0; + struct hp_handler *handler = list_entry(loop, struct hp_handler, + node); + if (qman_retire_fq(&handler->rx, &flags) || + (flags & QMAN_FQ_STATE_BLOCKOOS)) { + pr_crit("qman_retire_fq(rx) failed, flags: %x", flags); + WARN_ON(1); + return -EIO; + } + if (qman_oos_fq(&handler->rx)) { + pr_crit("qman_oos_fq(rx) failed"); + WARN_ON(1); + return -EIO; + } + qman_destroy_fq(&handler->rx); + qman_destroy_fq(&handler->tx); + qman_release_fqid(handler->fqid_rx); + list_del(&handler->node); + kmem_cache_free(hp_handler_slab, handler); + } + return 0; +} + +static inline u8 num_cachelines(u32 offset) +{ + u8 res = (offset + (L1_CACHE_BYTES - 1)) + / (L1_CACHE_BYTES); + if (res > 3) + return 3; + return res; +} +#define STASH_DATA_CL \ + num_cachelines(HP_NUM_WORDS * 4) +#define STASH_CTX_CL \ + num_cachelines(offsetof(struct hp_handler, fqid_rx)) + +static int init_handler(void *h) +{ + struct qm_mcc_initfq opts; + struct hp_handler *handler = h; + int err; + + if (handler->processor_id != smp_processor_id()) { + err = -EIO; + goto failed; + } + /* Set up rx */ + memset(&handler->rx, 0, sizeof(handler->rx)); + if (handler == special_handler) + handler->rx.cb.dqrr = special_dqrr; + else + handler->rx.cb.dqrr = normal_dqrr; + err = qman_create_fq(handler->fqid_rx, 0, &handler->rx); + if (err) { + pr_crit("qman_create_fq(rx) failed"); + goto failed; + } + memset(&opts, 0, sizeof(opts)); + opts.we_mask = cpu_to_be16(QM_INITFQ_WE_FQCTRL | + QM_INITFQ_WE_CONTEXTA); + opts.fqd.fq_ctrl = cpu_to_be16(QM_FQCTRL_CTXASTASHING); + qm_fqd_set_stashing(&opts.fqd, 0, STASH_DATA_CL, STASH_CTX_CL); + err = qman_init_fq(&handler->rx, QMAN_INITFQ_FLAG_SCHED | + QMAN_INITFQ_FLAG_LOCAL, &opts); + if (err) { + pr_crit("qman_init_fq(rx) failed"); + goto failed; + } + /* Set up tx */ + memset(&handler->tx, 0, sizeof(handler->tx)); + err = qman_create_fq(handler->fqid_tx, QMAN_FQ_FLAG_NO_MODIFY, + &handler->tx); + if (err) { + pr_crit("qman_create_fq(tx) failed"); + goto failed; + } + + return 0; +failed: + return err; +} + +static void init_handler_cb(void *h) +{ + if (init_handler(h)) + WARN_ON(1); +} + +static int init_phase2(void) +{ + int loop; + u32 fqid = 0; + u32 lfsr = 0xdeadbeef; + struct hp_cpu *hp_cpu; + struct hp_handler *handler; + + for (loop = 0; loop < HP_PER_CPU; loop++) { + list_for_each_entry(hp_cpu, &hp_cpu_list, node) { + int err; + + if (!loop) + hp_cpu->iterator = list_first_entry( + &hp_cpu->handlers, + struct hp_handler, node); + else + hp_cpu->iterator = list_entry( + hp_cpu->iterator->node.next, + struct hp_handler, node); + /* Rx FQID is the previous handler's Tx FQID */ + hp_cpu->iterator->fqid_rx = fqid; + /* Allocate new FQID for Tx */ + err = qman_alloc_fqid(&fqid); + if (err) { + pr_crit("qman_alloc_fqid() failed"); + return err; + } + hp_cpu->iterator->fqid_tx = fqid; + /* Rx mixer is the previous handler's Tx mixer */ + hp_cpu->iterator->rx_mixer = lfsr; + /* Get new mixer for Tx */ + lfsr = do_lfsr(lfsr); + hp_cpu->iterator->tx_mixer = lfsr; + } + } + /* Fix up the first handler (fqid_rx==0, rx_mixer=0xdeadbeef) */ + hp_cpu = list_first_entry(&hp_cpu_list, struct hp_cpu, node); + handler = list_first_entry(&hp_cpu->handlers, struct hp_handler, node); + if (handler->fqid_rx != 0 || handler->rx_mixer != 0xdeadbeef) + return 1; + handler->fqid_rx = fqid; + handler->rx_mixer = lfsr; + /* and tag it as our "special" handler */ + special_handler = handler; + return 0; +} + +static int init_phase3(void) +{ + int loop, err; + struct hp_cpu *hp_cpu; + + for (loop = 0; loop < HP_PER_CPU; loop++) { + list_for_each_entry(hp_cpu, &hp_cpu_list, node) { + if (!loop) + hp_cpu->iterator = list_first_entry( + &hp_cpu->handlers, + struct hp_handler, node); + else + hp_cpu->iterator = list_entry( + hp_cpu->iterator->node.next, + struct hp_handler, node); + preempt_disable(); + if (hp_cpu->processor_id == smp_processor_id()) { + err = init_handler(hp_cpu->iterator); + if (err) + return err; + } else { + smp_call_function_single(hp_cpu->processor_id, + init_handler_cb, hp_cpu->iterator, 1); + } + preempt_enable(); + } + } + return 0; +} + +static int send_first_frame(void *ignore) +{ + u32 *p = special_handler->frame_ptr; + u32 lfsr = HP_FIRST_WORD; + int loop, err; + struct qm_fd fd; + + if (special_handler->processor_id != smp_processor_id()) { + err = -EIO; + goto failed; + } + memset(&fd, 0, sizeof(fd)); + qm_fd_addr_set64(&fd, special_handler->addr); + qm_fd_set_contig_big(&fd, HP_NUM_WORDS * 4); + for (loop = 0; loop < HP_NUM_WORDS; loop++, p++) { + if (*p != lfsr) { + err = -EIO; + pr_crit("corrupt frame data"); + goto failed; + } + *p ^= special_handler->tx_mixer; + lfsr = do_lfsr(lfsr); + } + pr_info("Sending first frame\n"); + err = qman_enqueue(&special_handler->tx, &fd); + if (err) { + pr_crit("qman_enqueue() failed"); + goto failed; + } + + return 0; +failed: + return err; +} + +static void send_first_frame_cb(void *ignore) +{ + if (send_first_frame(NULL)) + WARN_ON(1); +} + +int qman_test_stash(void) +{ + int err; + + if (cpumask_weight(cpu_online_mask) < 2) { + pr_info("%s(): skip - only 1 CPU\n", __func__); + return 0; + } + + pr_info("%s(): Starting\n", __func__); + + hp_cpu_list_length = 0; + loop_counter = 0; + hp_handler_slab = kmem_cache_create("hp_handler_slab", + sizeof(struct hp_handler), L1_CACHE_BYTES, + SLAB_HWCACHE_ALIGN, NULL); + if (!hp_handler_slab) { + err = -EIO; + pr_crit("kmem_cache_create() failed"); + goto failed; + } + + err = allocate_frame_data(); + if (err) + goto failed; + + /* Init phase 1 */ + pr_info("Creating %d handlers per cpu...\n", HP_PER_CPU); + if (on_all_cpus(create_per_cpu_handlers)) { + err = -EIO; + pr_crit("on_each_cpu() failed"); + goto failed; + } + pr_info("Number of cpus: %d, total of %d handlers\n", + hp_cpu_list_length, hp_cpu_list_length * HP_PER_CPU); + + err = init_phase2(); + if (err) + goto failed; + + err = init_phase3(); + if (err) + goto failed; + + preempt_disable(); + if (special_handler->processor_id == smp_processor_id()) { + err = send_first_frame(NULL); + if (err) + goto failed; + } else { + smp_call_function_single(special_handler->processor_id, + send_first_frame_cb, NULL, 1); + } + preempt_enable(); + + wait_event(queue, loop_counter == HP_LOOPS); + deallocate_frame_data(); + if (on_all_cpus(destroy_per_cpu_handlers)) { + err = -EIO; + pr_crit("on_each_cpu() failed"); + goto failed; + } + kmem_cache_destroy(hp_handler_slab); + pr_info("%s(): Finished\n", __func__); + + return 0; +failed: + WARN_ON(1); + return err; +} -- cgit v1.2.3