From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: [PATCH 1/2] lpfc: use pci_irq_alloc_vectors and pci_irq_free_vectors Date: Thu, 17 Nov 2016 16:14:52 +0100 Message-ID: <1479395693-5781-2-git-send-email-hch@lst.de> References: <1479395693-5781-1-git-send-email-hch@lst.de> Return-path: Received: from bombadil.infradead.org ([198.137.202.9]:49050 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933410AbcKQRFr (ORCPT ); Thu, 17 Nov 2016 12:05:47 -0500 In-Reply-To: <1479395693-5781-1-git-send-email-hch@lst.de> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: james.smart@broadcom.com Cc: hare@suse.de, linux-scsi@vger.kernel.org This avoids having to store the msix_entries array and simpliefies the shutdown and cleanup path a lot. Signed-off-by: Christoph Hellwig --- drivers/scsi/lpfc/lpfc.h | 2 - drivers/scsi/lpfc/lpfc_init.c | 240 ++++++++++-------------------------------- drivers/scsi/lpfc/lpfc_sli4.h | 1 - 3 files changed, 54 insertions(+), 189 deletions(-) diff --git a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h index 8a20b4e..e4a57cf 100644 --- a/drivers/scsi/lpfc/lpfc.h +++ b/drivers/scsi/lpfc/lpfc.h @@ -879,8 +879,6 @@ struct lpfc_hba { enum intr_type_t intr_type; uint32_t intr_mode; #define LPFC_INTR_ERROR 0xFFFFFFFF - struct msix_entry msix_entries[LPFC_MSIX_VECTORS]; - struct list_head port_list; struct lpfc_vport *pport; /* physical lpfc_vport pointer */ uint16_t max_vpi; /* Maximum virtual nports */ diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c index 4776fd8..c4e8fad 100644 --- a/drivers/scsi/lpfc/lpfc_init.c +++ b/drivers/scsi/lpfc/lpfc_init.c @@ -5510,17 +5510,6 @@ lpfc_sli4_driver_resource_setup(struct lpfc_hba *phba) goto out_free_fcf_rr_bmask; } - phba->sli4_hba.msix_entries = kzalloc((sizeof(struct msix_entry) * - (fof_vectors + - phba->cfg_fcp_io_channel)), GFP_KERNEL); - if (!phba->sli4_hba.msix_entries) { - lpfc_printf_log(phba, KERN_ERR, LOG_INIT, - "2573 Failed allocate memory for msi-x " - "interrupt vector entries\n"); - rc = -ENOMEM; - goto out_free_fcp_eq_hdl; - } - phba->sli4_hba.cpu_map = kzalloc((sizeof(struct lpfc_vector_map_info) * phba->sli4_hba.num_present_cpu), GFP_KERNEL); @@ -5529,7 +5518,7 @@ lpfc_sli4_driver_resource_setup(struct lpfc_hba *phba) "3327 Failed allocate memory for msi-x " "interrupt vector mapping\n"); rc = -ENOMEM; - goto out_free_msix; + goto out_free_fcp_eq_hdl; } if (lpfc_used_cpu == NULL) { lpfc_used_cpu = kzalloc((sizeof(uint16_t) * lpfc_present_cpu), @@ -5540,7 +5529,7 @@ lpfc_sli4_driver_resource_setup(struct lpfc_hba *phba) "interrupt vector mapping\n"); kfree(phba->sli4_hba.cpu_map); rc = -ENOMEM; - goto out_free_msix; + goto out_free_fcp_eq_hdl; } for (i = 0; i < lpfc_present_cpu; i++) lpfc_used_cpu[i] = LPFC_VECTOR_MAP_EMPTY; @@ -5575,8 +5564,6 @@ lpfc_sli4_driver_resource_setup(struct lpfc_hba *phba) return 0; -out_free_msix: - kfree(phba->sli4_hba.msix_entries); out_free_fcp_eq_hdl: kfree(phba->sli4_hba.fcp_eq_hdl); out_free_fcf_rr_bmask: @@ -5612,9 +5599,6 @@ lpfc_sli4_driver_resource_unset(struct lpfc_hba *phba) phba->sli4_hba.num_online_cpu = 0; phba->sli4_hba.curr_disp_cpu = 0; - /* Free memory allocated for msi-x interrupt vector entries */ - kfree(phba->sli4_hba.msix_entries); - /* Free memory allocated for fast-path work queue handles */ kfree(phba->sli4_hba.fcp_eq_hdl); @@ -8485,16 +8469,7 @@ lpfc_sli4_pci_mem_unset(struct lpfc_hba *phba) * @phba: pointer to lpfc hba data structure. * * This routine is invoked to enable the MSI-X interrupt vectors to device - * with SLI-3 interface specs. The kernel function pci_enable_msix_exact() - * is called to enable the MSI-X vectors. Note that pci_enable_msix_exact(), - * once invoked, enables either all or nothing, depending on the current - * availability of PCI vector resources. The device driver is responsible - * for calling the individual request_irq() to register each MSI-X vector - * with a interrupt handler, which is done in this function. Note that - * later when device is unloading, the driver should always call free_irq() - * on all MSI-X vectors it has done request_irq() on before calling - * pci_disable_msix(). Failure to do so results in a BUG_ON() and a device - * will be left with MSI-X enabled and leaks its vectors. + * with SLI-3 interface specs. * * Return codes * 0 - successful @@ -8503,33 +8478,24 @@ lpfc_sli4_pci_mem_unset(struct lpfc_hba *phba) static int lpfc_sli_enable_msix(struct lpfc_hba *phba) { - int rc, i; + int rc; LPFC_MBOXQ_t *pmb; /* Set up MSI-X multi-message vectors */ - for (i = 0; i < LPFC_MSIX_VECTORS; i++) - phba->msix_entries[i].entry = i; - - /* Configure MSI-X capability structure */ - rc = pci_enable_msix_exact(phba->pcidev, phba->msix_entries, - LPFC_MSIX_VECTORS); - if (rc) { + rc = pci_alloc_irq_vectors(phba->pcidev, + LPFC_MSIX_VECTORS, LPFC_MSIX_VECTORS, PCI_IRQ_MSIX); + if (rc < 0) { lpfc_printf_log(phba, KERN_INFO, LOG_INIT, "0420 PCI enable MSI-X failed (%d)\n", rc); goto vec_fail_out; } - for (i = 0; i < LPFC_MSIX_VECTORS; i++) - lpfc_printf_log(phba, KERN_INFO, LOG_INIT, - "0477 MSI-X entry[%d]: vector=x%x " - "message=%d\n", i, - phba->msix_entries[i].vector, - phba->msix_entries[i].entry); + /* * Assign MSI-X vectors to interrupt handlers */ /* vector-0 is associated to slow-path handler */ - rc = request_irq(phba->msix_entries[0].vector, + rc = request_irq(pci_irq_vector(phba->pcidev, 0), &lpfc_sli_sp_intr_handler, 0, LPFC_SP_DRIVER_HANDLER_NAME, phba); if (rc) { @@ -8540,7 +8506,7 @@ lpfc_sli_enable_msix(struct lpfc_hba *phba) } /* vector-1 is associated to fast-path handler */ - rc = request_irq(phba->msix_entries[1].vector, + rc = request_irq(pci_irq_vector(phba->pcidev, 1), &lpfc_sli_fp_intr_handler, 0, LPFC_FP_DRIVER_HANDLER_NAME, phba); @@ -8585,42 +8551,21 @@ lpfc_sli_enable_msix(struct lpfc_hba *phba) mem_fail_out: /* free the irq already requested */ - free_irq(phba->msix_entries[1].vector, phba); + free_irq(pci_irq_vector(phba->pcidev, 1), phba); irq_fail_out: /* free the irq already requested */ - free_irq(phba->msix_entries[0].vector, phba); + free_irq(pci_irq_vector(phba->pcidev, 0), phba); msi_fail_out: /* Unconfigure MSI-X capability structure */ - pci_disable_msix(phba->pcidev); + pci_free_irq_vectors(phba->pcidev); vec_fail_out: return rc; } /** - * lpfc_sli_disable_msix - Disable MSI-X interrupt mode on SLI-3 device. - * @phba: pointer to lpfc hba data structure. - * - * This routine is invoked to release the MSI-X vectors and then disable the - * MSI-X interrupt mode to device with SLI-3 interface spec. - **/ -static void -lpfc_sli_disable_msix(struct lpfc_hba *phba) -{ - int i; - - /* Free up MSI-X multi-message vectors */ - for (i = 0; i < LPFC_MSIX_VECTORS; i++) - free_irq(phba->msix_entries[i].vector, phba); - /* Disable MSI-X */ - pci_disable_msix(phba->pcidev); - - return; -} - -/** * lpfc_sli_enable_msi - Enable MSI interrupt mode on SLI-3 device. * @phba: pointer to lpfc hba data structure. * @@ -8660,24 +8605,6 @@ lpfc_sli_enable_msi(struct lpfc_hba *phba) } /** - * lpfc_sli_disable_msi - Disable MSI interrupt mode to SLI-3 device. - * @phba: pointer to lpfc hba data structure. - * - * This routine is invoked to disable the MSI interrupt mode to device with - * SLI-3 interface spec. The driver calls free_irq() on MSI vector it has - * done request_irq() on before calling pci_disable_msi(). Failure to do so - * results in a BUG_ON() and a device will be left with MSI enabled and leaks - * its vector. - */ -static void -lpfc_sli_disable_msi(struct lpfc_hba *phba) -{ - free_irq(phba->pcidev->irq, phba); - pci_disable_msi(phba->pcidev); - return; -} - -/** * lpfc_sli_enable_intr - Enable device interrupt to SLI-3 device. * @phba: pointer to lpfc hba data structure. * @@ -8748,19 +8675,20 @@ lpfc_sli_enable_intr(struct lpfc_hba *phba, uint32_t cfg_mode) static void lpfc_sli_disable_intr(struct lpfc_hba *phba) { - /* Disable the currently initialized interrupt mode */ + int nr_irqs, i; + if (phba->intr_type == MSIX) - lpfc_sli_disable_msix(phba); - else if (phba->intr_type == MSI) - lpfc_sli_disable_msi(phba); - else if (phba->intr_type == INTx) - free_irq(phba->pcidev->irq, phba); + nr_irqs = LPFC_MSIX_VECTORS; + else + nr_irqs = 1; + + for (i = 0; i < nr_irqs; i++) + free_irq(pci_irq_vector(phba->pcidev, i), phba); + pci_free_irq_vectors(phba->pcidev); /* Reset interrupt management states */ phba->intr_type = NONE; phba->sli.slistat.sli_intr = 0; - - return; } /** @@ -8916,7 +8844,7 @@ lpfc_sli4_set_affinity(struct lpfc_hba *phba, int vectors) lpfc_used_cpu[cpu] = phys_id; /* Associate vector with selected CPU */ - cpup->irq = phba->sli4_hba.msix_entries[idx].vector; + cpup->irq = pci_irq_vector(phba->pcidev, idx); /* Associate IO channel with selected CPU */ cpup->channel_id = idx; @@ -8926,14 +8854,14 @@ lpfc_sli4_set_affinity(struct lpfc_hba *phba, int vectors) first_cpu = cpu; /* Now affinitize to the selected CPU */ - i = irq_set_affinity_hint(phba->sli4_hba.msix_entries[idx]. - vector, get_cpu_mask(cpu)); + i = irq_set_affinity_hint(pci_irq_vector(phba->pcidev, idx), + get_cpu_mask(cpu)); lpfc_printf_log(phba, KERN_INFO, LOG_INIT, "3330 Set Affinity: CPU %d channel %d " "irq %d (%x)\n", cpu, cpup->channel_id, - phba->sli4_hba.msix_entries[idx].vector, i); + pci_irq_vector(phba->pcidev, idx), i); /* Spread vector mapping across multple physical CPU nodes */ phys_id++; @@ -9048,14 +8976,7 @@ lpfc_sli4_set_affinity(struct lpfc_hba *phba, int vectors) * @phba: pointer to lpfc hba data structure. * * This routine is invoked to enable the MSI-X interrupt vectors to device - * with SLI-4 interface spec. The kernel function pci_enable_msix_range() - * is called to enable the MSI-X vectors. The device driver is responsible - * for calling the individual request_irq() to register each MSI-X vector - * with a interrupt handler, which is done in this function. Note that - * later when device is unloading, the driver should always call free_irq() - * on all MSI-X vectors it has done request_irq() on before calling - * pci_disable_msix(). Failure to do so results in a BUG_ON() and a device - * will be left with MSI-X enabled and leaks its vectors. + * with SLI-4 interface spec. * * Return codes * 0 - successful @@ -9067,17 +8988,11 @@ lpfc_sli4_enable_msix(struct lpfc_hba *phba) int vectors, rc, index; /* Set up MSI-X multi-message vectors */ - for (index = 0; index < phba->cfg_fcp_io_channel; index++) - phba->sli4_hba.msix_entries[index].entry = index; - - /* Configure MSI-X capability structure */ vectors = phba->cfg_fcp_io_channel; - if (phba->cfg_fof) { - phba->sli4_hba.msix_entries[index].entry = index; + if (phba->cfg_fof) vectors++; - } - rc = pci_enable_msix_range(phba->pcidev, phba->sli4_hba.msix_entries, - 2, vectors); + + rc = pci_alloc_irq_vectors(phba->pcidev, 2, vectors, PCI_IRQ_MSIX); if (rc < 0) { lpfc_printf_log(phba, KERN_INFO, LOG_INIT, "0484 PCI enable MSI-X failed (%d)\n", rc); @@ -9085,14 +9000,6 @@ lpfc_sli4_enable_msix(struct lpfc_hba *phba) } vectors = rc; - /* Log MSI-X vector assignment */ - for (index = 0; index < vectors; index++) - lpfc_printf_log(phba, KERN_INFO, LOG_INIT, - "0489 MSI-X entry[%d]: vector=x%x " - "message=%d\n", index, - phba->sli4_hba.msix_entries[index].vector, - phba->sli4_hba.msix_entries[index].entry); - /* Assign MSI-X vectors to interrupt handlers */ for (index = 0; index < vectors; index++) { memset(&phba->sli4_hba.handler_name[index], 0, 16); @@ -9104,14 +9011,12 @@ lpfc_sli4_enable_msix(struct lpfc_hba *phba) phba->sli4_hba.fcp_eq_hdl[index].phba = phba; atomic_set(&phba->sli4_hba.fcp_eq_hdl[index].fcp_eq_in_use, 1); if (phba->cfg_fof && (index == (vectors - 1))) - rc = request_irq( - phba->sli4_hba.msix_entries[index].vector, + rc = request_irq(pci_irq_vector(phba->pcidev, index), &lpfc_sli4_fof_intr_handler, 0, (char *)&phba->sli4_hba.handler_name[index], &phba->sli4_hba.fcp_eq_hdl[index]); else - rc = request_irq( - phba->sli4_hba.msix_entries[index].vector, + rc = request_irq(pci_irq_vector(phba->pcidev, index), &lpfc_sli4_hba_intr_handler, 0, (char *)&phba->sli4_hba.handler_name[index], &phba->sli4_hba.fcp_eq_hdl[index]); @@ -9141,49 +9046,20 @@ lpfc_sli4_enable_msix(struct lpfc_hba *phba) cfg_fail_out: /* free the irq already requested */ for (--index; index >= 0; index--) { - irq_set_affinity_hint(phba->sli4_hba.msix_entries[index]. - vector, NULL); - free_irq(phba->sli4_hba.msix_entries[index].vector, - &phba->sli4_hba.fcp_eq_hdl[index]); + int irq = pci_irq_vector(phba->pcidev, index); + + irq_set_affinity_hint(irq, NULL); + free_irq(irq, &phba->sli4_hba.fcp_eq_hdl[index]); } /* Unconfigure MSI-X capability structure */ - pci_disable_msix(phba->pcidev); + pci_free_irq_vectors(phba->pcidev); vec_fail_out: return rc; } /** - * lpfc_sli4_disable_msix - Disable MSI-X interrupt mode to SLI-4 device - * @phba: pointer to lpfc hba data structure. - * - * This routine is invoked to release the MSI-X vectors and then disable the - * MSI-X interrupt mode to device with SLI-4 interface spec. - **/ -static void -lpfc_sli4_disable_msix(struct lpfc_hba *phba) -{ - int index; - - /* Free up MSI-X multi-message vectors */ - for (index = 0; index < phba->cfg_fcp_io_channel; index++) { - irq_set_affinity_hint(phba->sli4_hba.msix_entries[index]. - vector, NULL); - free_irq(phba->sli4_hba.msix_entries[index].vector, - &phba->sli4_hba.fcp_eq_hdl[index]); - } - if (phba->cfg_fof) { - free_irq(phba->sli4_hba.msix_entries[index].vector, - &phba->sli4_hba.fcp_eq_hdl[index]); - } - /* Disable MSI-X */ - pci_disable_msix(phba->pcidev); - - return; -} - -/** * lpfc_sli4_enable_msi - Enable MSI interrupt mode to SLI-4 device * @phba: pointer to lpfc hba data structure. * @@ -9234,24 +9110,6 @@ lpfc_sli4_enable_msi(struct lpfc_hba *phba) } /** - * lpfc_sli4_disable_msi - Disable MSI interrupt mode to SLI-4 device - * @phba: pointer to lpfc hba data structure. - * - * This routine is invoked to disable the MSI interrupt mode to device with - * SLI-4 interface spec. The driver calls free_irq() on MSI vector it has - * done request_irq() on before calling pci_disable_msi(). Failure to do so - * results in a BUG_ON() and a device will be left with MSI enabled and leaks - * its vector. - **/ -static void -lpfc_sli4_disable_msi(struct lpfc_hba *phba) -{ - free_irq(phba->pcidev->irq, phba); - pci_disable_msi(phba->pcidev); - return; -} - -/** * lpfc_sli4_enable_intr - Enable device interrupt to SLI-4 device * @phba: pointer to lpfc hba data structure. * @@ -9336,18 +9194,28 @@ static void lpfc_sli4_disable_intr(struct lpfc_hba *phba) { /* Disable the currently initialized interrupt mode */ - if (phba->intr_type == MSIX) - lpfc_sli4_disable_msix(phba); - else if (phba->intr_type == MSI) - lpfc_sli4_disable_msi(phba); - else if (phba->intr_type == INTx) + if (phba->intr_type == MSIX) { + int index; + + /* Free up MSI-X multi-message vectors */ + for (index = 0; index < phba->cfg_fcp_io_channel; index++) { + int irq = pci_irq_vector(phba->pcidev, index); + + irq_set_affinity_hint(irq, NULL); + free_irq(irq, &phba->sli4_hba.fcp_eq_hdl[index]); + } + + if (phba->cfg_fof) + free_irq(pci_irq_vector(phba->pcidev, index), phba); + } else { free_irq(phba->pcidev->irq, phba); + } + + pci_free_irq_vectors(phba->pcidev); /* Reset interrupt management states */ phba->intr_type = NONE; phba->sli.slistat.sli_intr = 0; - - return; } /** diff --git a/drivers/scsi/lpfc/lpfc_sli4.h b/drivers/scsi/lpfc/lpfc_sli4.h index 0b88b570..dfbb25e 100644 --- a/drivers/scsi/lpfc/lpfc_sli4.h +++ b/drivers/scsi/lpfc/lpfc_sli4.h @@ -515,7 +515,6 @@ struct lpfc_sli4_hba { uint32_t ue_to_rp; struct lpfc_register sli_intf; struct lpfc_pc_sli4_params pc_sli4_params; - struct msix_entry *msix_entries; uint8_t handler_name[LPFC_SLI4_HANDLER_CNT][LPFC_SLI4_HANDLER_NAME_SZ]; struct lpfc_fcp_eq_hdl *fcp_eq_hdl; /* FCP per-WQ handle */ -- 2.1.4