From 511cbce2ff8b9d322077909ee90c5d4b67b29b75 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 10 Nov 2015 14:56:14 +0100 Subject: irq_poll: make blk-iopoll available outside the block layer The new name is irq_poll as iopoll is already taken. Better suggestions welcome. Signed-off-by: Christoph Hellwig Reviewed-by: Bart Van Assche --- drivers/scsi/ipr.c | 28 ++++++++++++++-------------- 1 file changed, 14 insertions(+), 14 deletions(-) (limited to 'drivers/scsi/ipr.c') diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c index 536cd5a80422..6b9c738cdc18 100644 --- a/drivers/scsi/ipr.c +++ b/drivers/scsi/ipr.c @@ -3638,7 +3638,7 @@ static struct device_attribute ipr_ioa_reset_attr = { .store = ipr_store_reset_adapter }; -static int ipr_iopoll(struct blk_iopoll *iop, int budget); +static int ipr_iopoll(struct irq_poll *iop, int budget); /** * ipr_show_iopoll_weight - Show ipr polling mode * @dev: class device struct @@ -3681,34 +3681,34 @@ static ssize_t ipr_store_iopoll_weight(struct device *dev, int i; if (!ioa_cfg->sis64) { - dev_info(&ioa_cfg->pdev->dev, "blk-iopoll not supported on this adapter\n"); + dev_info(&ioa_cfg->pdev->dev, "irq_poll not supported on this adapter\n"); return -EINVAL; } if (kstrtoul(buf, 10, &user_iopoll_weight)) return -EINVAL; if (user_iopoll_weight > 256) { - dev_info(&ioa_cfg->pdev->dev, "Invalid blk-iopoll weight. It must be less than 256\n"); + dev_info(&ioa_cfg->pdev->dev, "Invalid irq_poll weight. It must be less than 256\n"); return -EINVAL; } if (user_iopoll_weight == ioa_cfg->iopoll_weight) { - dev_info(&ioa_cfg->pdev->dev, "Current blk-iopoll weight has the same weight\n"); + dev_info(&ioa_cfg->pdev->dev, "Current irq_poll weight has the same weight\n"); return strlen(buf); } if (ioa_cfg->iopoll_weight && ioa_cfg->sis64 && ioa_cfg->nvectors > 1) { for (i = 1; i < ioa_cfg->hrrq_num; i++) - blk_iopoll_disable(&ioa_cfg->hrrq[i].iopoll); + irq_poll_disable(&ioa_cfg->hrrq[i].iopoll); } spin_lock_irqsave(shost->host_lock, lock_flags); ioa_cfg->iopoll_weight = user_iopoll_weight; if (ioa_cfg->iopoll_weight && ioa_cfg->sis64 && ioa_cfg->nvectors > 1) { for (i = 1; i < ioa_cfg->hrrq_num; i++) { - blk_iopoll_init(&ioa_cfg->hrrq[i].iopoll, + irq_poll_init(&ioa_cfg->hrrq[i].iopoll, ioa_cfg->iopoll_weight, ipr_iopoll); - blk_iopoll_enable(&ioa_cfg->hrrq[i].iopoll); + irq_poll_enable(&ioa_cfg->hrrq[i].iopoll); } } spin_unlock_irqrestore(shost->host_lock, lock_flags); @@ -5569,7 +5569,7 @@ static int ipr_process_hrrq(struct ipr_hrr_queue *hrr_queue, int budget, return num_hrrq; } -static int ipr_iopoll(struct blk_iopoll *iop, int budget) +static int ipr_iopoll(struct irq_poll *iop, int budget) { struct ipr_ioa_cfg *ioa_cfg; struct ipr_hrr_queue *hrrq; @@ -5585,7 +5585,7 @@ static int ipr_iopoll(struct blk_iopoll *iop, int budget) completed_ops = ipr_process_hrrq(hrrq, budget, &doneq); if (completed_ops < budget) - blk_iopoll_complete(iop); + irq_poll_complete(iop); spin_unlock_irqrestore(hrrq->lock, hrrq_flags); list_for_each_entry_safe(ipr_cmd, temp, &doneq, queue) { @@ -5693,8 +5693,8 @@ static irqreturn_t ipr_isr_mhrrq(int irq, void *devp) if (ioa_cfg->iopoll_weight && ioa_cfg->sis64 && ioa_cfg->nvectors > 1) { if ((be32_to_cpu(*hrrq->hrrq_curr) & IPR_HRRQ_TOGGLE_BIT) == hrrq->toggle_bit) { - if (!blk_iopoll_sched_prep(&hrrq->iopoll)) - blk_iopoll_sched(&hrrq->iopoll); + if (!irq_poll_sched_prep(&hrrq->iopoll)) + irq_poll_sched(&hrrq->iopoll); spin_unlock_irqrestore(hrrq->lock, hrrq_flags); return IRQ_HANDLED; } @@ -10405,9 +10405,9 @@ static int ipr_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id) if (ioa_cfg->iopoll_weight && ioa_cfg->sis64 && ioa_cfg->nvectors > 1) { for (i = 1; i < ioa_cfg->hrrq_num; i++) { - blk_iopoll_init(&ioa_cfg->hrrq[i].iopoll, + irq_poll_init(&ioa_cfg->hrrq[i].iopoll, ioa_cfg->iopoll_weight, ipr_iopoll); - blk_iopoll_enable(&ioa_cfg->hrrq[i].iopoll); + irq_poll_enable(&ioa_cfg->hrrq[i].iopoll); } } @@ -10436,7 +10436,7 @@ static void ipr_shutdown(struct pci_dev *pdev) if (ioa_cfg->iopoll_weight && ioa_cfg->sis64 && ioa_cfg->nvectors > 1) { ioa_cfg->iopoll_weight = 0; for (i = 1; i < ioa_cfg->hrrq_num; i++) - blk_iopoll_disable(&ioa_cfg->hrrq[i].iopoll); + irq_poll_disable(&ioa_cfg->hrrq[i].iopoll); } while (ioa_cfg->in_reset_reload) { -- cgit v1.2.3 From 78d0264eb7a938f1eaf59fcb2d3f7da2567369d3 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Mon, 7 Dec 2015 06:38:28 -0800 Subject: irq_poll: don't disable new irq_poll instances There is no good reason to start out disabled - drivers can control if the poll instance can be scheduled by simply not scheduling it yet. Signed-off-by: Christoph Hellwig Reviewed-by: Bart Van Assche --- drivers/scsi/be2iscsi/be_main.c | 2 -- drivers/scsi/ipr.c | 2 -- lib/irq_poll.c | 4 +--- 3 files changed, 1 insertion(+), 7 deletions(-) (limited to 'drivers/scsi/ipr.c') diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c index 1d879ef406d8..471e2b942435 100644 --- a/drivers/scsi/be2iscsi/be_main.c +++ b/drivers/scsi/be2iscsi/be_main.c @@ -5581,7 +5581,6 @@ static void beiscsi_eeh_resume(struct pci_dev *pdev) pbe_eq = &phwi_context->be_eq[i]; irq_poll_init(&pbe_eq->iopoll, be_iopoll_budget, be_iopoll); - irq_poll_enable(&pbe_eq->iopoll); } i = (phba->msix_enabled) ? i : 0; @@ -5754,7 +5753,6 @@ static int beiscsi_dev_probe(struct pci_dev *pcidev, pbe_eq = &phwi_context->be_eq[i]; irq_poll_init(&pbe_eq->iopoll, be_iopoll_budget, be_iopoll); - irq_poll_enable(&pbe_eq->iopoll); } i = (phba->msix_enabled) ? i : 0; diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c index 6b9c738cdc18..402e4ca32d70 100644 --- a/drivers/scsi/ipr.c +++ b/drivers/scsi/ipr.c @@ -3708,7 +3708,6 @@ static ssize_t ipr_store_iopoll_weight(struct device *dev, for (i = 1; i < ioa_cfg->hrrq_num; i++) { irq_poll_init(&ioa_cfg->hrrq[i].iopoll, ioa_cfg->iopoll_weight, ipr_iopoll); - irq_poll_enable(&ioa_cfg->hrrq[i].iopoll); } } spin_unlock_irqrestore(shost->host_lock, lock_flags); @@ -10407,7 +10406,6 @@ static int ipr_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id) for (i = 1; i < ioa_cfg->hrrq_num; i++) { irq_poll_init(&ioa_cfg->hrrq[i].iopoll, ioa_cfg->iopoll_weight, ipr_iopoll); - irq_poll_enable(&ioa_cfg->hrrq[i].iopoll); } } diff --git a/lib/irq_poll.c b/lib/irq_poll.c index e6fd1dc0908b..88af87971e8c 100644 --- a/lib/irq_poll.c +++ b/lib/irq_poll.c @@ -170,8 +170,7 @@ EXPORT_SYMBOL(irq_poll_enable); * @poll_fn: The handler to invoke * * Description: - * Initialize this irq_poll structure. Before being actively used, the - * driver must call irq_poll_enable(). + * Initialize and enable this irq_poll structure. **/ void irq_poll_init(struct irq_poll *iop, int weight, irq_poll_fn *poll_fn) { @@ -179,7 +178,6 @@ void irq_poll_init(struct irq_poll *iop, int weight, irq_poll_fn *poll_fn) INIT_LIST_HEAD(&iop->list); iop->weight = weight; iop->poll = poll_fn; - set_bit(IRQ_POLL_F_SCHED, &iop->state); } EXPORT_SYMBOL(irq_poll_init); -- cgit v1.2.3 From ea51190c03150fce4d9e428bfb608abbe0991db8 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Mon, 7 Dec 2015 06:41:11 -0800 Subject: irq_poll: fold irq_poll_sched_prep into irq_poll_sched There is no good reason to keep them apart, and this makes using the API a bit simpler. Signed-off-by: Christoph Hellwig Reviewed-by: Bart Van Assche --- drivers/scsi/be2iscsi/be_main.c | 6 ++---- drivers/scsi/ipr.c | 3 +-- include/linux/irq_poll.h | 13 ------------- lib/irq_poll.c | 10 +++++++--- 4 files changed, 10 insertions(+), 22 deletions(-) (limited to 'drivers/scsi/ipr.c') diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c index 471e2b942435..cb9072a841be 100644 --- a/drivers/scsi/be2iscsi/be_main.c +++ b/drivers/scsi/be2iscsi/be_main.c @@ -910,8 +910,7 @@ static irqreturn_t be_isr_msix(int irq, void *dev_id) num_eq_processed = 0; while (eqe->dw[offsetof(struct amap_eq_entry, valid) / 32] & EQE_VALID_MASK) { - if (!irq_poll_sched_prep(&pbe_eq->iopoll)) - irq_poll_sched(&pbe_eq->iopoll); + irq_poll_sched(&pbe_eq->iopoll); AMAP_SET_BITS(struct amap_eq_entry, valid, eqe, 0); queue_tail_inc(eq); @@ -972,8 +971,7 @@ static irqreturn_t be_isr(int irq, void *dev_id) spin_unlock_irqrestore(&phba->isr_lock, flags); num_mcceq_processed++; } else { - if (!irq_poll_sched_prep(&pbe_eq->iopoll)) - irq_poll_sched(&pbe_eq->iopoll); + irq_poll_sched(&pbe_eq->iopoll); num_ioeq_processed++; } AMAP_SET_BITS(struct amap_eq_entry, valid, eqe, 0); diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c index 402e4ca32d70..82031e00b2e9 100644 --- a/drivers/scsi/ipr.c +++ b/drivers/scsi/ipr.c @@ -5692,8 +5692,7 @@ static irqreturn_t ipr_isr_mhrrq(int irq, void *devp) if (ioa_cfg->iopoll_weight && ioa_cfg->sis64 && ioa_cfg->nvectors > 1) { if ((be32_to_cpu(*hrrq->hrrq_curr) & IPR_HRRQ_TOGGLE_BIT) == hrrq->toggle_bit) { - if (!irq_poll_sched_prep(&hrrq->iopoll)) - irq_poll_sched(&hrrq->iopoll); + irq_poll_sched(&hrrq->iopoll); spin_unlock_irqrestore(hrrq->lock, hrrq_flags); return IRQ_HANDLED; } diff --git a/include/linux/irq_poll.h b/include/linux/irq_poll.h index 50c39dcd2cba..57efae661400 100644 --- a/include/linux/irq_poll.h +++ b/include/linux/irq_poll.h @@ -18,19 +18,6 @@ enum { IRQ_POLL_F_DISABLE = 1, }; -/* - * Returns 0 if we successfully set the IRQ_POLL_F_SCHED bit, indicating - * that we were the first to acquire this iop for scheduling. If this iop - * is currently disabled, return "failure". - */ -static inline int irq_poll_sched_prep(struct irq_poll *iop) -{ - if (!test_bit(IRQ_POLL_F_DISABLE, &iop->state)) - return test_and_set_bit(IRQ_POLL_F_SCHED, &iop->state); - - return 1; -} - static inline int irq_poll_disable_pending(struct irq_poll *iop) { return test_bit(IRQ_POLL_F_DISABLE, &iop->state); diff --git a/lib/irq_poll.c b/lib/irq_poll.c index 88af87971e8c..43a3370a09fd 100644 --- a/lib/irq_poll.c +++ b/lib/irq_poll.c @@ -21,13 +21,17 @@ static DEFINE_PER_CPU(struct list_head, blk_cpu_iopoll); * * Description: * Add this irq_poll structure to the pending poll list and trigger the - * raise of the blk iopoll softirq. The driver must already have gotten a - * successful return from irq_poll_sched_prep() before calling this. + * raise of the blk iopoll softirq. **/ void irq_poll_sched(struct irq_poll *iop) { unsigned long flags; + if (test_bit(IRQ_POLL_F_DISABLE, &iop->state)) + return; + if (!test_and_set_bit(IRQ_POLL_F_SCHED, &iop->state)) + return; + local_irq_save(flags); list_add_tail(&iop->list, this_cpu_ptr(&blk_cpu_iopoll)); __raise_softirq_irqoff(IRQ_POLL_SOFTIRQ); @@ -58,7 +62,7 @@ EXPORT_SYMBOL(__irq_poll_complete); * Description: * If a driver consumes less than the assigned budget in its run of the * iopoll handler, it'll end the polled mode by calling this function. The - * iopoll handler will not be invoked again before irq_poll_sched_prep() + * iopoll handler will not be invoked again before irq_poll_sched() * is called. **/ void irq_poll_complete(struct irq_poll *iop) -- cgit v1.2.3