The only generic interface to execute asynchronously in the BH context is tasklet; however, it's marked deprecated and has some design flaws. To replace tasklets, BH workqueue support was recently added. A BH workqueue behaves similarly to regular workqueues except that the queued work items are executed in the BH context.
This patch converts drivers/infiniband/* from tasklet to BH workqueue. Based on the work done by Tejun Heo <t...@kernel.org> Branch: https://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git for-6.10 Signed-off-by: Allen Pais <allen.l...@gmail.com> --- drivers/infiniband/hw/bnxt_re/bnxt_re.h | 3 +- drivers/infiniband/hw/bnxt_re/qplib_fp.c | 21 ++++++------ drivers/infiniband/hw/bnxt_re/qplib_fp.h | 2 +- drivers/infiniband/hw/bnxt_re/qplib_rcfw.c | 25 ++++++++------- drivers/infiniband/hw/bnxt_re/qplib_rcfw.h | 2 +- drivers/infiniband/hw/erdma/erdma.h | 3 +- drivers/infiniband/hw/erdma/erdma_eq.c | 11 ++++--- drivers/infiniband/hw/hfi1/rc.c | 2 +- drivers/infiniband/hw/hfi1/sdma.c | 37 +++++++++++----------- drivers/infiniband/hw/hfi1/sdma.h | 9 +++--- drivers/infiniband/hw/hfi1/tid_rdma.c | 6 ++-- drivers/infiniband/hw/irdma/ctrl.c | 2 +- drivers/infiniband/hw/irdma/hw.c | 24 +++++++------- drivers/infiniband/hw/irdma/main.h | 5 +-- drivers/infiniband/hw/qib/qib.h | 7 ++-- drivers/infiniband/hw/qib/qib_iba7322.c | 9 +++--- drivers/infiniband/hw/qib/qib_rc.c | 16 +++++----- drivers/infiniband/hw/qib/qib_ruc.c | 4 +-- drivers/infiniband/hw/qib/qib_sdma.c | 11 ++++--- drivers/infiniband/sw/rdmavt/qp.c | 2 +- 20 files changed, 106 insertions(+), 95 deletions(-) diff --git a/drivers/infiniband/hw/bnxt_re/bnxt_re.h b/drivers/infiniband/hw/bnxt_re/bnxt_re.h index 9dca451ed522..f511c8415806 100644 --- a/drivers/infiniband/hw/bnxt_re/bnxt_re.h +++ b/drivers/infiniband/hw/bnxt_re/bnxt_re.h @@ -42,6 +42,7 @@ #include <rdma/uverbs_ioctl.h> #include "hw_counters.h" #include <linux/hashtable.h> +#include <linux/workqueue.h> #define ROCE_DRV_MODULE_NAME "bnxt_re" #define BNXT_RE_DESC "Broadcom NetXtreme-C/E RoCE Driver" @@ -162,7 +163,7 @@ struct bnxt_re_dev { u8 cur_prio_map; /* FP Notification Queue (CQ & SRQ) */ - struct tasklet_struct nq_task; + struct work_struct nq_work; /* RCFW Channel */ struct bnxt_qplib_rcfw rcfw; diff --git a/drivers/infiniband/hw/bnxt_re/qplib_fp.c b/drivers/infiniband/hw/bnxt_re/qplib_fp.c index 439d0c7c5d0c..052906982cdf 100644 --- a/drivers/infiniband/hw/bnxt_re/qplib_fp.c +++ b/drivers/infiniband/hw/bnxt_re/qplib_fp.c @@ -46,6 +46,7 @@ #include <linux/delay.h> #include <linux/prefetch.h> #include <linux/if_ether.h> +#include <linux/workqueue.h> #include <rdma/ib_mad.h> #include "roce_hsi.h" @@ -294,9 +295,9 @@ static void __wait_for_all_nqes(struct bnxt_qplib_cq *cq, u16 cnq_events) } } -static void bnxt_qplib_service_nq(struct tasklet_struct *t) +static void bnxt_qplib_service_nq(struct work_struct *t) { - struct bnxt_qplib_nq *nq = from_tasklet(nq, t, nq_tasklet); + struct bnxt_qplib_nq *nq = from_work(nq, t, nq_work); struct bnxt_qplib_hwq *hwq = &nq->hwq; struct bnxt_qplib_cq *cq; int budget = nq->budget; @@ -394,7 +395,7 @@ void bnxt_re_synchronize_nq(struct bnxt_qplib_nq *nq) int budget = nq->budget; nq->budget = nq->hwq.max_elements; - bnxt_qplib_service_nq(&nq->nq_tasklet); + bnxt_qplib_service_nq(&nq->nq_work); nq->budget = budget; } @@ -409,7 +410,7 @@ static irqreturn_t bnxt_qplib_nq_irq(int irq, void *dev_instance) prefetch(bnxt_qplib_get_qe(hwq, sw_cons, NULL)); /* Fan out to CPU affinitized kthreads? */ - tasklet_schedule(&nq->nq_tasklet); + queue_work(system_bh_wq, &nq->nq_work); return IRQ_HANDLED; } @@ -430,8 +431,8 @@ void bnxt_qplib_nq_stop_irq(struct bnxt_qplib_nq *nq, bool kill) nq->name = NULL; if (kill) - tasklet_kill(&nq->nq_tasklet); - tasklet_disable(&nq->nq_tasklet); + cancel_work_sync(&nq->nq_work); + disable_work_sync(&nq->nq_work); } void bnxt_qplib_disable_nq(struct bnxt_qplib_nq *nq) @@ -465,9 +466,9 @@ int bnxt_qplib_nq_start_irq(struct bnxt_qplib_nq *nq, int nq_indx, nq->msix_vec = msix_vector; if (need_init) - tasklet_setup(&nq->nq_tasklet, bnxt_qplib_service_nq); + INIT_WORK(&nq->nq_work, bnxt_qplib_service_nq); else - tasklet_enable(&nq->nq_tasklet); + enable_and_queue_work(system_bh_wq, &nq->nq_work); nq->name = kasprintf(GFP_KERNEL, "bnxt_re-nq-%d@pci:%s", nq_indx, pci_name(res->pdev)); @@ -477,7 +478,7 @@ int bnxt_qplib_nq_start_irq(struct bnxt_qplib_nq *nq, int nq_indx, if (rc) { kfree(nq->name); nq->name = NULL; - tasklet_disable(&nq->nq_tasklet); + disable_work_sync(&nq->nq_work); return rc; } @@ -541,7 +542,7 @@ int bnxt_qplib_enable_nq(struct pci_dev *pdev, struct bnxt_qplib_nq *nq, nq->cqn_handler = cqn_handler; nq->srqn_handler = srqn_handler; - /* Have a task to schedule CQ notifiers in post send case */ + /* Have a work to schedule CQ notifiers in post send case */ nq->cqn_wq = create_singlethread_workqueue("bnxt_qplib_nq"); if (!nq->cqn_wq) return -ENOMEM; diff --git a/drivers/infiniband/hw/bnxt_re/qplib_fp.h b/drivers/infiniband/hw/bnxt_re/qplib_fp.h index 7fd4506b3584..6ee3e501d136 100644 --- a/drivers/infiniband/hw/bnxt_re/qplib_fp.h +++ b/drivers/infiniband/hw/bnxt_re/qplib_fp.h @@ -494,7 +494,7 @@ struct bnxt_qplib_nq { u16 ring_id; int msix_vec; cpumask_t mask; - struct tasklet_struct nq_tasklet; + struct work_struct nq_work; bool requested; int budget; diff --git a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c index 3ffaef0c2651..2fba712d88db 100644 --- a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c +++ b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c @@ -43,6 +43,7 @@ #include <linux/pci.h> #include <linux/prefetch.h> #include <linux/delay.h> +#include <linux/workqueue.h> #include "roce_hsi.h" #include "qplib_res.h" @@ -51,7 +52,7 @@ #include "qplib_fp.h" #include "qplib_tlv.h" -static void bnxt_qplib_service_creq(struct tasklet_struct *t); +static void bnxt_qplib_service_creq(struct work_struct *t); /** * bnxt_qplib_map_rc - map return type based on opcode @@ -165,7 +166,7 @@ static int __wait_for_resp(struct bnxt_qplib_rcfw *rcfw, u16 cookie) if (!crsqe->is_in_used) return 0; - bnxt_qplib_service_creq(&rcfw->creq.creq_tasklet); + bnxt_qplib_service_creq(&rcfw->creq.creq_work); if (!crsqe->is_in_used) return 0; @@ -206,7 +207,7 @@ static int __block_for_resp(struct bnxt_qplib_rcfw *rcfw, u16 cookie) udelay(1); - bnxt_qplib_service_creq(&rcfw->creq.creq_tasklet); + bnxt_qplib_service_creq(&rcfw->creq.creq_work); if (!crsqe->is_in_used) return 0; @@ -403,7 +404,7 @@ static int __poll_for_resp(struct bnxt_qplib_rcfw *rcfw, u16 cookie) usleep_range(1000, 1001); - bnxt_qplib_service_creq(&rcfw->creq.creq_tasklet); + bnxt_qplib_service_creq(&rcfw->creq.creq_work); if (!crsqe->is_in_used) return 0; if (jiffies_to_msecs(jiffies - issue_time) > @@ -727,9 +728,9 @@ static int bnxt_qplib_process_qp_event(struct bnxt_qplib_rcfw *rcfw, } /* SP - CREQ Completion handlers */ -static void bnxt_qplib_service_creq(struct tasklet_struct *t) +static void bnxt_qplib_service_creq(struct work_struct *t) { - struct bnxt_qplib_rcfw *rcfw = from_tasklet(rcfw, t, creq.creq_tasklet); + struct bnxt_qplib_rcfw *rcfw = from_work(rcfw, t, creq.creq_work); struct bnxt_qplib_creq_ctx *creq = &rcfw->creq; u32 type, budget = CREQ_ENTRY_POLL_BUDGET; struct bnxt_qplib_hwq *hwq = &creq->hwq; @@ -800,7 +801,7 @@ static irqreturn_t bnxt_qplib_creq_irq(int irq, void *dev_instance) sw_cons = HWQ_CMP(hwq->cons, hwq); prefetch(bnxt_qplib_get_qe(hwq, sw_cons, NULL)); - tasklet_schedule(&creq->creq_tasklet); + queue_work(system_bh_wq, &creq->creq_work); return IRQ_HANDLED; } @@ -1007,8 +1008,8 @@ void bnxt_qplib_rcfw_stop_irq(struct bnxt_qplib_rcfw *rcfw, bool kill) creq->irq_name = NULL; atomic_set(&rcfw->rcfw_intr_enabled, 0); if (kill) - tasklet_kill(&creq->creq_tasklet); - tasklet_disable(&creq->creq_tasklet); + cancel_work_sync(&creq->creq_work); + disable_work_sync(&creq->creq_work); } void bnxt_qplib_disable_rcfw_channel(struct bnxt_qplib_rcfw *rcfw) @@ -1045,9 +1046,9 @@ int bnxt_qplib_rcfw_start_irq(struct bnxt_qplib_rcfw *rcfw, int msix_vector, creq->msix_vec = msix_vector; if (need_init) - tasklet_setup(&creq->creq_tasklet, bnxt_qplib_service_creq); + INIT_WORK(&creq->creq_work, bnxt_qplib_service_creq); else - tasklet_enable(&creq->creq_tasklet); + enable_and_queue_work(system_bh_wq, &creq->creq_work); creq->irq_name = kasprintf(GFP_KERNEL, "bnxt_re-creq@pci:%s", pci_name(res->pdev)); @@ -1058,7 +1059,7 @@ int bnxt_qplib_rcfw_start_irq(struct bnxt_qplib_rcfw *rcfw, int msix_vector, if (rc) { kfree(creq->irq_name); creq->irq_name = NULL; - tasklet_disable(&creq->creq_tasklet); + disable_work_sync(&creq->creq_work); return rc; } creq->requested = true; diff --git a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.h b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.h index 45996e60a0d0..8efa474fcf3f 100644 --- a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.h +++ b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.h @@ -207,7 +207,7 @@ struct bnxt_qplib_creq_ctx { struct bnxt_qplib_hwq hwq; struct bnxt_qplib_creq_db creq_db; struct bnxt_qplib_creq_stat stats; - struct tasklet_struct creq_tasklet; + struct work_struct creq_work; aeq_handler_t aeq_handler; u16 ring_id; int msix_vec; diff --git a/drivers/infiniband/hw/erdma/erdma.h b/drivers/infiniband/hw/erdma/erdma.h index 5df401a30cb9..9a47c1432c27 100644 --- a/drivers/infiniband/hw/erdma/erdma.h +++ b/drivers/infiniband/hw/erdma/erdma.h @@ -11,6 +11,7 @@ #include <linux/netdevice.h> #include <linux/pci.h> #include <linux/xarray.h> +#include <linux/workqueue.h> #include <rdma/ib_verbs.h> #include "erdma_hw.h" @@ -161,7 +162,7 @@ struct erdma_eq_cb { void *dev; /* All EQs use this fields to get erdma_dev struct */ struct erdma_irq irq; struct erdma_eq eq; - struct tasklet_struct tasklet; + struct work_struct work; }; struct erdma_resource_cb { diff --git a/drivers/infiniband/hw/erdma/erdma_eq.c b/drivers/infiniband/hw/erdma/erdma_eq.c index ea47cb21fdb8..252906fd73b0 100644 --- a/drivers/infiniband/hw/erdma/erdma_eq.c +++ b/drivers/infiniband/hw/erdma/erdma_eq.c @@ -160,14 +160,16 @@ static irqreturn_t erdma_intr_ceq_handler(int irq, void *data) { struct erdma_eq_cb *ceq_cb = data; - tasklet_schedule(&ceq_cb->tasklet); + queue_work(system_bh_wq, &ceq_cb->work); return IRQ_HANDLED; } -static void erdma_intr_ceq_task(unsigned long data) +static void erdma_intr_ceq_task(struct work_struct *t) { - erdma_ceq_completion_handler((struct erdma_eq_cb *)data); + struct erdma_eq_cb *ceq_cb = from_work(ceq_cb, t, work); + + erdma_ceq_completion_handler(ceq_cb); } static int erdma_set_ceq_irq(struct erdma_dev *dev, u16 ceqn) @@ -179,8 +181,7 @@ static int erdma_set_ceq_irq(struct erdma_dev *dev, u16 ceqn) pci_name(dev->pdev)); eqc->irq.msix_vector = pci_irq_vector(dev->pdev, ceqn + 1); - tasklet_init(&dev->ceqs[ceqn].tasklet, erdma_intr_ceq_task, - (unsigned long)&dev->ceqs[ceqn]); + INIT_WORK(&dev->ceqs[ceqn].work, erdma_intr_ceq_task); cpumask_set_cpu(cpumask_local_spread(ceqn + 1, dev->attrs.numa_node), &eqc->irq.affinity_hint_mask); diff --git a/drivers/infiniband/hw/hfi1/rc.c b/drivers/infiniband/hw/hfi1/rc.c index b36242c9d42c..ec19ddbfdacb 100644 --- a/drivers/infiniband/hw/hfi1/rc.c +++ b/drivers/infiniband/hw/hfi1/rc.c @@ -1210,7 +1210,7 @@ static inline void hfi1_queue_rc_ack(struct hfi1_packet *packet, bool is_fecn) if (is_fecn) qp->s_flags |= RVT_S_ECN; - /* Schedule the send tasklet. */ + /* Schedule the send work. */ hfi1_schedule_send(qp); unlock: spin_unlock_irqrestore(&qp->s_lock, flags); diff --git a/drivers/infiniband/hw/hfi1/sdma.c b/drivers/infiniband/hw/hfi1/sdma.c index b67d23b1f286..5e1a1dd45511 100644 --- a/drivers/infiniband/hw/hfi1/sdma.c +++ b/drivers/infiniband/hw/hfi1/sdma.c @@ -11,6 +11,7 @@ #include <linux/timer.h> #include <linux/vmalloc.h> #include <linux/highmem.h> +#include <linux/workqueue.h> #include "hfi.h" #include "common.h" @@ -190,11 +191,11 @@ static const struct sdma_set_state_action sdma_action_table[] = { static void sdma_complete(struct kref *); static void sdma_finalput(struct sdma_state *); static void sdma_get(struct sdma_state *); -static void sdma_hw_clean_up_task(struct tasklet_struct *); +static void sdma_hw_clean_up_task(struct work_struct *); static void sdma_put(struct sdma_state *); static void sdma_set_state(struct sdma_engine *, enum sdma_states); static void sdma_start_hw_clean_up(struct sdma_engine *); -static void sdma_sw_clean_up_task(struct tasklet_struct *); +static void sdma_sw_clean_up_task(struct work_struct *); static void sdma_sendctrl(struct sdma_engine *, unsigned); static void init_sdma_regs(struct sdma_engine *, u32, uint); static void sdma_process_event( @@ -503,9 +504,9 @@ static void sdma_err_progress_check(struct timer_list *t) schedule_work(&sde->err_halt_worker); } -static void sdma_hw_clean_up_task(struct tasklet_struct *t) +static void sdma_hw_clean_up_task(struct work_struct *t) { - struct sdma_engine *sde = from_tasklet(sde, t, + struct sdma_engine *sde = from_work(sde, t, sdma_hw_clean_up_task); u64 statuscsr; @@ -563,9 +564,9 @@ static void sdma_flush_descq(struct sdma_engine *sde) sdma_desc_avail(sde, sdma_descq_freecnt(sde)); } -static void sdma_sw_clean_up_task(struct tasklet_struct *t) +static void sdma_sw_clean_up_task(struct work_struct *t) { - struct sdma_engine *sde = from_tasklet(sde, t, sdma_sw_clean_up_task); + struct sdma_engine *sde = from_work(sde, t, sdma_sw_clean_up_task); unsigned long flags; spin_lock_irqsave(&sde->tail_lock, flags); @@ -624,7 +625,7 @@ static void sdma_sw_tear_down(struct sdma_engine *sde) static void sdma_start_hw_clean_up(struct sdma_engine *sde) { - tasklet_hi_schedule(&sde->sdma_hw_clean_up_task); + queue_work(system_bh_highpri_wq, &sde->sdma_hw_clean_up_task); } static void sdma_set_state(struct sdma_engine *sde, @@ -1415,9 +1416,9 @@ int sdma_init(struct hfi1_devdata *dd, u8 port) sde->tail_csr = get_kctxt_csr_addr(dd, this_idx, SD(TAIL)); - tasklet_setup(&sde->sdma_hw_clean_up_task, + INIT_WORK(&sde->sdma_hw_clean_up_task, sdma_hw_clean_up_task); - tasklet_setup(&sde->sdma_sw_clean_up_task, + INIT_WORK(&sde->sdma_sw_clean_up_task, sdma_sw_clean_up_task); INIT_WORK(&sde->err_halt_worker, sdma_err_halt_wait); INIT_WORK(&sde->flush_worker, sdma_field_flush); @@ -2741,7 +2742,7 @@ static void __sdma_process_event(struct sdma_engine *sde, switch (event) { case sdma_event_e00_go_hw_down: sdma_set_state(sde, sdma_state_s00_hw_down); - tasklet_hi_schedule(&sde->sdma_sw_clean_up_task); + queue_work(system_bh_highpri_wq, &sde->sdma_sw_clean_up_task); break; case sdma_event_e10_go_hw_start: break; @@ -2783,13 +2784,13 @@ static void __sdma_process_event(struct sdma_engine *sde, switch (event) { case sdma_event_e00_go_hw_down: sdma_set_state(sde, sdma_state_s00_hw_down); - tasklet_hi_schedule(&sde->sdma_sw_clean_up_task); + queue_work(system_bh_highpri_wq, &sde->sdma_sw_clean_up_task); break; case sdma_event_e10_go_hw_start: break; case sdma_event_e15_hw_halt_done: sdma_set_state(sde, sdma_state_s30_sw_clean_up_wait); - tasklet_hi_schedule(&sde->sdma_sw_clean_up_task); + queue_work(system_bh_highpri_wq, &sde->sdma_sw_clean_up_task); break; case sdma_event_e25_hw_clean_up_done: break; @@ -2824,13 +2825,13 @@ static void __sdma_process_event(struct sdma_engine *sde, switch (event) { case sdma_event_e00_go_hw_down: sdma_set_state(sde, sdma_state_s00_hw_down); - tasklet_hi_schedule(&sde->sdma_sw_clean_up_task); + queue_work(system_bh_highpri_wq, &sde->sdma_sw_clean_up_task); break; case sdma_event_e10_go_hw_start: break; case sdma_event_e15_hw_halt_done: sdma_set_state(sde, sdma_state_s30_sw_clean_up_wait); - tasklet_hi_schedule(&sde->sdma_sw_clean_up_task); + queue_work(system_bh_highpri_wq, &sde->sdma_sw_clean_up_task); break; case sdma_event_e25_hw_clean_up_done: break; @@ -2864,7 +2865,7 @@ static void __sdma_process_event(struct sdma_engine *sde, switch (event) { case sdma_event_e00_go_hw_down: sdma_set_state(sde, sdma_state_s00_hw_down); - tasklet_hi_schedule(&sde->sdma_sw_clean_up_task); + queue_work(system_bh_highpri_wq, &sde->sdma_sw_clean_up_task); break; case sdma_event_e10_go_hw_start: break; @@ -2888,7 +2889,7 @@ static void __sdma_process_event(struct sdma_engine *sde, break; case sdma_event_e81_hw_frozen: sdma_set_state(sde, sdma_state_s82_freeze_sw_clean); - tasklet_hi_schedule(&sde->sdma_sw_clean_up_task); + queue_work(system_bh_highpri_wq, &sde->sdma_sw_clean_up_task); break; case sdma_event_e82_hw_unfreeze: break; @@ -2903,7 +2904,7 @@ static void __sdma_process_event(struct sdma_engine *sde, switch (event) { case sdma_event_e00_go_hw_down: sdma_set_state(sde, sdma_state_s00_hw_down); - tasklet_hi_schedule(&sde->sdma_sw_clean_up_task); + queue_work(system_bh_highpri_wq, &sde->sdma_sw_clean_up_task); break; case sdma_event_e10_go_hw_start: break; @@ -2947,7 +2948,7 @@ static void __sdma_process_event(struct sdma_engine *sde, switch (event) { case sdma_event_e00_go_hw_down: sdma_set_state(sde, sdma_state_s00_hw_down); - tasklet_hi_schedule(&sde->sdma_sw_clean_up_task); + queue_work(system_bh_highpri_wq, &sde->sdma_sw_clean_up_task); break; case sdma_event_e10_go_hw_start: break; diff --git a/drivers/infiniband/hw/hfi1/sdma.h b/drivers/infiniband/hw/hfi1/sdma.h index d77246b48434..3f047260cebe 100644 --- a/drivers/infiniband/hw/hfi1/sdma.h +++ b/drivers/infiniband/hw/hfi1/sdma.h @@ -11,6 +11,7 @@ #include <asm/byteorder.h> #include <linux/workqueue.h> #include <linux/rculist.h> +#include <linux/workqueue.h> #include "hfi.h" #include "verbs.h" @@ -346,11 +347,11 @@ struct sdma_engine { /* CONFIG SDMA for now, just blindly duplicate */ /* private: */ - struct tasklet_struct sdma_hw_clean_up_task + struct work_struct sdma_hw_clean_up_task ____cacheline_aligned_in_smp; /* private: */ - struct tasklet_struct sdma_sw_clean_up_task + struct work_struct sdma_sw_clean_up_task ____cacheline_aligned_in_smp; /* private: */ struct work_struct err_halt_worker; @@ -471,7 +472,7 @@ void _sdma_txreq_ahgadd( * Completions of submitted requests can be gotten on selected * txreqs by giving a completion routine callback to sdma_txinit() or * sdma_txinit_ahg(). The environment in which the callback runs - * can be from an ISR, a tasklet, or a thread, so no sleeping + * can be from an ISR, a work, or a thread, so no sleeping * kernel routines can be used. Aspects of the sdma ring may * be locked so care should be taken with locking. * @@ -551,7 +552,7 @@ static inline int sdma_txinit_ahg( * Completions of submitted requests can be gotten on selected * txreqs by giving a completion routine callback to sdma_txinit() or * sdma_txinit_ahg(). The environment in which the callback runs - * can be from an ISR, a tasklet, or a thread, so no sleeping + * can be from an ISR, a work, or a thread, so no sleeping * kernel routines can be used. The head size of the sdma ring may * be locked so care should be taken with locking. * diff --git a/drivers/infiniband/hw/hfi1/tid_rdma.c b/drivers/infiniband/hw/hfi1/tid_rdma.c index c465966a1d9c..31cb5a092f42 100644 --- a/drivers/infiniband/hw/hfi1/tid_rdma.c +++ b/drivers/infiniband/hw/hfi1/tid_rdma.c @@ -2316,7 +2316,7 @@ void hfi1_rc_rcv_tid_rdma_read_req(struct hfi1_packet *packet) */ qpriv->r_tid_alloc = qp->r_head_ack_queue; - /* Schedule the send tasklet. */ + /* Schedule the send work. */ qp->s_flags |= RVT_S_RESP_PENDING; if (fecn) qp->s_flags |= RVT_S_ECN; @@ -3807,7 +3807,7 @@ void hfi1_rc_rcv_tid_rdma_write_req(struct hfi1_packet *packet) hfi1_tid_write_alloc_resources(qp, true); trace_hfi1_tid_write_rsp_rcv_req(qp); - /* Schedule the send tasklet. */ + /* Schedule the send work. */ qp->s_flags |= RVT_S_RESP_PENDING; if (fecn) qp->s_flags |= RVT_S_ECN; @@ -5389,7 +5389,7 @@ static void hfi1_do_tid_send(struct rvt_qp *qp) /* * If the packet cannot be sent now, return and - * the send tasklet will be woken up later. + * the send work will be woken up later. */ if (hfi1_verbs_send(qp, &ps)) return; diff --git a/drivers/infiniband/hw/irdma/ctrl.c b/drivers/infiniband/hw/irdma/ctrl.c index 6aed6169c07d..e9644f2b774d 100644 --- a/drivers/infiniband/hw/irdma/ctrl.c +++ b/drivers/infiniband/hw/irdma/ctrl.c @@ -5271,7 +5271,7 @@ int irdma_process_cqp_cmd(struct irdma_sc_dev *dev, } /** - * irdma_process_bh - called from tasklet for cqp list + * irdma_process_bh - called from work for cqp list * @dev: sc device struct */ int irdma_process_bh(struct irdma_sc_dev *dev) diff --git a/drivers/infiniband/hw/irdma/hw.c b/drivers/infiniband/hw/irdma/hw.c index ad50b77282f8..18d552919c28 100644 --- a/drivers/infiniband/hw/irdma/hw.c +++ b/drivers/infiniband/hw/irdma/hw.c @@ -440,12 +440,12 @@ static void irdma_ena_intr(struct irdma_sc_dev *dev, u32 msix_id) } /** - * irdma_dpc - tasklet for aeq and ceq 0 - * @t: tasklet_struct ptr + * irdma_dpc - work for aeq and ceq 0 + * @t: work_struct ptr */ -static void irdma_dpc(struct tasklet_struct *t) +static void irdma_dpc(struct work_struct *t) { - struct irdma_pci_f *rf = from_tasklet(rf, t, dpc_tasklet); + struct irdma_pci_f *rf = from_work(rf, t, dpc_work); if (rf->msix_shared) irdma_process_ceq(rf, rf->ceqlist); @@ -455,11 +455,11 @@ static void irdma_dpc(struct tasklet_struct *t) /** * irdma_ceq_dpc - dpc handler for CEQ - * @t: tasklet_struct ptr + * @t: work_struct ptr */ -static void irdma_ceq_dpc(struct tasklet_struct *t) +static void irdma_ceq_dpc(struct work_struct *t) { - struct irdma_ceq *iwceq = from_tasklet(iwceq, t, dpc_tasklet); + struct irdma_ceq *iwceq = from_work(iwceq, t, dpc_work); struct irdma_pci_f *rf = iwceq->rf; irdma_process_ceq(rf, iwceq); @@ -533,7 +533,7 @@ static irqreturn_t irdma_irq_handler(int irq, void *data) { struct irdma_pci_f *rf = data; - tasklet_schedule(&rf->dpc_tasklet); + queue_work(system_bh_wq, &rf->dpc_work); return IRQ_HANDLED; } @@ -550,7 +550,7 @@ static irqreturn_t irdma_ceq_handler(int irq, void *data) if (iwceq->irq != irq) ibdev_err(to_ibdev(&iwceq->rf->sc_dev), "expected irq = %d received irq = %d\n", iwceq->irq, irq); - tasklet_schedule(&iwceq->dpc_tasklet); + queue_work(system_bh_wq, &iwceq->dpc_work); return IRQ_HANDLED; } @@ -1121,14 +1121,14 @@ static int irdma_cfg_ceq_vector(struct irdma_pci_f *rf, struct irdma_ceq *iwceq, if (rf->msix_shared && !ceq_id) { snprintf(msix_vec->name, sizeof(msix_vec->name) - 1, "irdma-%s-AEQCEQ-0", dev_name(&rf->pcidev->dev)); - tasklet_setup(&rf->dpc_tasklet, irdma_dpc); + INIT_WORK(&rf->dpc_work, irdma_dpc); status = request_irq(msix_vec->irq, irdma_irq_handler, 0, msix_vec->name, rf); } else { snprintf(msix_vec->name, sizeof(msix_vec->name) - 1, "irdma-%s-CEQ-%d", dev_name(&rf->pcidev->dev), ceq_id); - tasklet_setup(&iwceq->dpc_tasklet, irdma_ceq_dpc); + INIT_WORK(&iwceq->dpc_work, irdma_ceq_dpc); status = request_irq(msix_vec->irq, irdma_ceq_handler, 0, msix_vec->name, iwceq); @@ -1162,7 +1162,7 @@ static int irdma_cfg_aeq_vector(struct irdma_pci_f *rf) if (!rf->msix_shared) { snprintf(msix_vec->name, sizeof(msix_vec->name) - 1, "irdma-%s-AEQ", dev_name(&rf->pcidev->dev)); - tasklet_setup(&rf->dpc_tasklet, irdma_dpc); + INIT_WORK(&rf->dpc_work, irdma_dpc); ret = request_irq(msix_vec->irq, irdma_irq_handler, 0, msix_vec->name, rf); } diff --git a/drivers/infiniband/hw/irdma/main.h b/drivers/infiniband/hw/irdma/main.h index b65bc2ea542f..54301093b746 100644 --- a/drivers/infiniband/hw/irdma/main.h +++ b/drivers/infiniband/hw/irdma/main.h @@ -30,6 +30,7 @@ #endif #include <linux/auxiliary_bus.h> #include <linux/net/intel/iidc.h> +#include <linux/workqueue.h> #include <crypto/hash.h> #include <rdma/ib_smi.h> #include <rdma/ib_verbs.h> @@ -192,7 +193,7 @@ struct irdma_ceq { u32 irq; u32 msix_idx; struct irdma_pci_f *rf; - struct tasklet_struct dpc_tasklet; + struct work_struct dpc_work; spinlock_t ce_lock; /* sync cq destroy with cq completion event notification */ }; @@ -316,7 +317,7 @@ struct irdma_pci_f { struct mc_table_list mc_qht_list; struct irdma_msix_vector *iw_msixtbl; struct irdma_qvlist_info *iw_qvlist; - struct tasklet_struct dpc_tasklet; + struct work_struct dpc_work; struct msix_entry *msix_entries; struct irdma_dma_mem obj_mem; struct irdma_dma_mem obj_next; diff --git a/drivers/infiniband/hw/qib/qib.h b/drivers/infiniband/hw/qib/qib.h index 26c615772be3..d2ebaf31ce5a 100644 --- a/drivers/infiniband/hw/qib/qib.h +++ b/drivers/infiniband/hw/qib/qib.h @@ -53,6 +53,7 @@ #include <linux/sched.h> #include <linux/kthread.h> #include <linux/xarray.h> +#include <linux/workqueue.h> #include <rdma/ib_hdrs.h> #include <rdma/rdma_vt.h> @@ -562,7 +563,7 @@ struct qib_pportdata { u8 sdma_generation; u8 sdma_intrequest; - struct tasklet_struct sdma_sw_clean_up_task + struct work_struct sdma_sw_clean_up_task ____cacheline_aligned_in_smp; wait_queue_head_t state_wait; /* for state_wanted */ @@ -1068,8 +1069,8 @@ struct qib_devdata { u8 psxmitwait_supported; /* cycle length of PS* counters in HW (in picoseconds) */ u16 psxmitwait_check_rate; - /* high volume overflow errors defered to tasklet */ - struct tasklet_struct error_tasklet; + /* high volume overflow errors defered to work */ + struct work_struct error_work; int assigned_node_id; /* NUMA node closest to HCA */ }; diff --git a/drivers/infiniband/hw/qib/qib_iba7322.c b/drivers/infiniband/hw/qib/qib_iba7322.c index f93906d8fc09..c3325071f2b3 100644 --- a/drivers/infiniband/hw/qib/qib_iba7322.c +++ b/drivers/infiniband/hw/qib/qib_iba7322.c @@ -46,6 +46,7 @@ #include <rdma/ib_smi.h> #ifdef CONFIG_INFINIBAND_QIB_DCA #include <linux/dca.h> +#include <linux/workqueue.h> #endif #include "qib.h" @@ -1711,9 +1712,9 @@ static noinline void handle_7322_errors(struct qib_devdata *dd) return; } -static void qib_error_tasklet(struct tasklet_struct *t) +static void qib_error_work(struct work_struct *t) { - struct qib_devdata *dd = from_tasklet(dd, t, error_tasklet); + struct qib_devdata *dd = from_work(dd, t, error_work); handle_7322_errors(dd); qib_write_kreg(dd, kr_errmask, dd->cspec->errormask); @@ -3001,7 +3002,7 @@ static noinline void unlikely_7322_intr(struct qib_devdata *dd, u64 istat) unknown_7322_gpio_intr(dd); if (istat & QIB_I_C_ERROR) { qib_write_kreg(dd, kr_errmask, 0ULL); - tasklet_schedule(&dd->error_tasklet); + queue_work(system_bh_wq, &dd->error_work); } if (istat & INT_MASK_P(Err, 0) && dd->rcd[0]) handle_7322_p_errors(dd->rcd[0]->ppd); @@ -3515,7 +3516,7 @@ static void qib_setup_7322_interrupt(struct qib_devdata *dd, int clearpend) for (i = 0; i < ARRAY_SIZE(redirect); i++) qib_write_kreg(dd, kr_intredirect + i, redirect[i]); dd->cspec->main_int_mask = mask; - tasklet_setup(&dd->error_tasklet, qib_error_tasklet); + INIT_WORK(&dd->error_work, qib_error_work); } /** diff --git a/drivers/infiniband/hw/qib/qib_rc.c b/drivers/infiniband/hw/qib/qib_rc.c index a1c20ffb4490..79e31921e384 100644 --- a/drivers/infiniband/hw/qib/qib_rc.c +++ b/drivers/infiniband/hw/qib/qib_rc.c @@ -593,7 +593,7 @@ int qib_make_rc_req(struct rvt_qp *qp, unsigned long *flags) * * This is called from qib_rc_rcv() and qib_kreceive(). * Note that RDMA reads and atomics are handled in the - * send side QP state and tasklet. + * send side QP state and work. */ void qib_send_rc_ack(struct rvt_qp *qp) { @@ -670,7 +670,7 @@ void qib_send_rc_ack(struct rvt_qp *qp) /* * We are out of PIO buffers at the moment. * Pass responsibility for sending the ACK to the - * send tasklet so that when a PIO buffer becomes + * send work so that when a PIO buffer becomes * available, the ACK is sent ahead of other outgoing * packets. */ @@ -715,7 +715,7 @@ void qib_send_rc_ack(struct rvt_qp *qp) qp->s_nak_state = qp->r_nak_state; qp->s_ack_psn = qp->r_ack_psn; - /* Schedule the send tasklet. */ + /* Schedule the send work. */ qib_schedule_send(qp); } unlock: @@ -806,7 +806,7 @@ static void reset_psn(struct rvt_qp *qp, u32 psn) qp->s_psn = psn; /* * Set RVT_S_WAIT_PSN as qib_rc_complete() may start the timer - * asynchronously before the send tasklet can get scheduled. + * asynchronously before the send work can get scheduled. * Doing it in qib_make_rc_req() is too late. */ if ((qib_cmp24(qp->s_psn, qp->s_sending_hpsn) <= 0) && @@ -1292,7 +1292,7 @@ static void qib_rc_rcv_resp(struct qib_ibport *ibp, (qib_cmp24(qp->s_sending_psn, qp->s_sending_hpsn) <= 0)) { /* - * If send tasklet not running attempt to progress + * If send work not running attempt to progress * SDMA queue. */ if (!(qp->s_flags & RVT_S_BUSY)) { @@ -1629,7 +1629,7 @@ static int qib_rc_rcv_error(struct ib_other_headers *ohdr, case OP(FETCH_ADD): { /* * If we didn't find the atomic request in the ack queue - * or the send tasklet is already backed up to send an + * or the send work is already backed up to send an * earlier entry, we can ignore this request. */ if (!e || e->opcode != (u8) opcode || old_req) @@ -1996,7 +1996,7 @@ void qib_rc_rcv(struct qib_ctxtdata *rcd, struct ib_header *hdr, qp->r_nak_state = 0; qp->r_head_ack_queue = next; - /* Schedule the send tasklet. */ + /* Schedule the send work. */ qp->s_flags |= RVT_S_RESP_PENDING; qib_schedule_send(qp); @@ -2059,7 +2059,7 @@ void qib_rc_rcv(struct qib_ctxtdata *rcd, struct ib_header *hdr, qp->r_nak_state = 0; qp->r_head_ack_queue = next; - /* Schedule the send tasklet. */ + /* Schedule the send work. */ qp->s_flags |= RVT_S_RESP_PENDING; qib_schedule_send(qp); diff --git a/drivers/infiniband/hw/qib/qib_ruc.c b/drivers/infiniband/hw/qib/qib_ruc.c index 1fa21938f310..f44a2a8b4b1e 100644 --- a/drivers/infiniband/hw/qib/qib_ruc.c +++ b/drivers/infiniband/hw/qib/qib_ruc.c @@ -257,7 +257,7 @@ void _qib_do_send(struct work_struct *work) * @qp: pointer to the QP * * Process entries in the send work queue until credit or queue is - * exhausted. Only allow one CPU to send a packet per QP (tasklet). + * exhausted. Only allow one CPU to send a packet per QP (work). * Otherwise, two threads could send packets out of order. */ void qib_do_send(struct rvt_qp *qp) @@ -299,7 +299,7 @@ void qib_do_send(struct rvt_qp *qp) spin_unlock_irqrestore(&qp->s_lock, flags); /* * If the packet cannot be sent now, return and - * the send tasklet will be woken up later. + * the send work will be woken up later. */ if (qib_verbs_send(qp, priv->s_hdr, qp->s_hdrwords, qp->s_cur_sge, qp->s_cur_size)) diff --git a/drivers/infiniband/hw/qib/qib_sdma.c b/drivers/infiniband/hw/qib/qib_sdma.c index 5e86cbf7d70e..facb3964d2ec 100644 --- a/drivers/infiniband/hw/qib/qib_sdma.c +++ b/drivers/infiniband/hw/qib/qib_sdma.c @@ -34,6 +34,7 @@ #include <linux/spinlock.h> #include <linux/netdevice.h> #include <linux/moduleparam.h> +#include <linux/workqueue.h> #include "qib.h" #include "qib_common.h" @@ -62,7 +63,7 @@ static void sdma_get(struct qib_sdma_state *); static void sdma_put(struct qib_sdma_state *); static void sdma_set_state(struct qib_pportdata *, enum qib_sdma_states); static void sdma_start_sw_clean_up(struct qib_pportdata *); -static void sdma_sw_clean_up_task(struct tasklet_struct *); +static void sdma_sw_clean_up_task(struct work_struct *); static void unmap_desc(struct qib_pportdata *, unsigned); static void sdma_get(struct qib_sdma_state *ss) @@ -119,9 +120,9 @@ static void clear_sdma_activelist(struct qib_pportdata *ppd) } } -static void sdma_sw_clean_up_task(struct tasklet_struct *t) +static void sdma_sw_clean_up_task(struct work_struct *t) { - struct qib_pportdata *ppd = from_tasklet(ppd, t, + struct qib_pportdata *ppd = from_work(ppd, t, sdma_sw_clean_up_task); unsigned long flags; @@ -188,7 +189,7 @@ static void sdma_sw_tear_down(struct qib_pportdata *ppd) static void sdma_start_sw_clean_up(struct qib_pportdata *ppd) { - tasklet_hi_schedule(&ppd->sdma_sw_clean_up_task); + queue_work(system_bh_highpri_wq, &ppd->sdma_sw_clean_up_task); } static void sdma_set_state(struct qib_pportdata *ppd, @@ -437,7 +438,7 @@ int qib_setup_sdma(struct qib_pportdata *ppd) INIT_LIST_HEAD(&ppd->sdma_activelist); - tasklet_setup(&ppd->sdma_sw_clean_up_task, sdma_sw_clean_up_task); + INIT_WORK(&ppd->sdma_sw_clean_up_task, sdma_sw_clean_up_task); ret = dd->f_init_sdma_regs(ppd); if (ret) diff --git a/drivers/infiniband/sw/rdmavt/qp.c b/drivers/infiniband/sw/rdmavt/qp.c index e6203e26cc06..efe4689151c2 100644 --- a/drivers/infiniband/sw/rdmavt/qp.c +++ b/drivers/infiniband/sw/rdmavt/qp.c @@ -1306,7 +1306,7 @@ int rvt_error_qp(struct rvt_qp *qp, enum ib_wc_status err) rdi->driver_f.notify_error_qp(qp); - /* Schedule the sending tasklet to drain the send work queue. */ + /* Schedule the sending work to drain the send work queue. */ if (READ_ONCE(qp->s_last) != qp->s_head) rdi->driver_f.schedule_send(qp); -- 2.17.1
