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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/crypto/intel/qat/qat_common/adf_isr.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/crypto/intel/qat/qat_common/adf_isr.c')
-rw-r--r-- | drivers/crypto/intel/qat/qat_common/adf_isr.c | 388 |
1 files changed, 388 insertions, 0 deletions
diff --git a/drivers/crypto/intel/qat/qat_common/adf_isr.c b/drivers/crypto/intel/qat/qat_common/adf_isr.c new file mode 100644 index 0000000000..2aba194a7c --- /dev/null +++ b/drivers/crypto/intel/qat/qat_common/adf_isr.c @@ -0,0 +1,388 @@ +// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only) +/* Copyright(c) 2014 - 2020 Intel Corporation */ +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/types.h> +#include <linux/pci.h> +#include <linux/slab.h> +#include <linux/errno.h> +#include <linux/interrupt.h> +#include "adf_accel_devices.h" +#include "adf_common_drv.h" +#include "adf_cfg.h" +#include "adf_cfg_strings.h" +#include "adf_cfg_common.h" +#include "adf_transport_access_macros.h" +#include "adf_transport_internal.h" + +#define ADF_MAX_NUM_VFS 32 +static struct workqueue_struct *adf_misc_wq; + +static int adf_enable_msix(struct adf_accel_dev *accel_dev) +{ + struct adf_accel_pci *pci_dev_info = &accel_dev->accel_pci_dev; + struct adf_hw_device_data *hw_data = accel_dev->hw_device; + u32 msix_num_entries = hw_data->num_banks + 1; + int ret; + + if (hw_data->set_msix_rttable) + hw_data->set_msix_rttable(accel_dev); + + ret = pci_alloc_irq_vectors(pci_dev_info->pci_dev, msix_num_entries, + msix_num_entries, PCI_IRQ_MSIX); + if (unlikely(ret < 0)) { + dev_err(&GET_DEV(accel_dev), + "Failed to allocate %d MSI-X vectors\n", + msix_num_entries); + return ret; + } + return 0; +} + +static void adf_disable_msix(struct adf_accel_pci *pci_dev_info) +{ + pci_free_irq_vectors(pci_dev_info->pci_dev); +} + +static irqreturn_t adf_msix_isr_bundle(int irq, void *bank_ptr) +{ + struct adf_etr_bank_data *bank = bank_ptr; + struct adf_hw_csr_ops *csr_ops = GET_CSR_OPS(bank->accel_dev); + + csr_ops->write_csr_int_flag_and_col(bank->csr_addr, bank->bank_number, + 0); + tasklet_hi_schedule(&bank->resp_handler); + return IRQ_HANDLED; +} + +#ifdef CONFIG_PCI_IOV +void adf_enable_vf2pf_interrupts(struct adf_accel_dev *accel_dev, u32 vf_mask) +{ + void __iomem *pmisc_addr = adf_get_pmisc_base(accel_dev); + unsigned long flags; + + spin_lock_irqsave(&accel_dev->pf.vf2pf_ints_lock, flags); + GET_PFVF_OPS(accel_dev)->enable_vf2pf_interrupts(pmisc_addr, vf_mask); + spin_unlock_irqrestore(&accel_dev->pf.vf2pf_ints_lock, flags); +} + +void adf_disable_all_vf2pf_interrupts(struct adf_accel_dev *accel_dev) +{ + void __iomem *pmisc_addr = adf_get_pmisc_base(accel_dev); + unsigned long flags; + + spin_lock_irqsave(&accel_dev->pf.vf2pf_ints_lock, flags); + GET_PFVF_OPS(accel_dev)->disable_all_vf2pf_interrupts(pmisc_addr); + spin_unlock_irqrestore(&accel_dev->pf.vf2pf_ints_lock, flags); +} + +static u32 adf_disable_pending_vf2pf_interrupts(struct adf_accel_dev *accel_dev) +{ + void __iomem *pmisc_addr = adf_get_pmisc_base(accel_dev); + u32 pending; + + spin_lock(&accel_dev->pf.vf2pf_ints_lock); + pending = GET_PFVF_OPS(accel_dev)->disable_pending_vf2pf_interrupts(pmisc_addr); + spin_unlock(&accel_dev->pf.vf2pf_ints_lock); + + return pending; +} + +static bool adf_handle_vf2pf_int(struct adf_accel_dev *accel_dev) +{ + bool irq_handled = false; + unsigned long vf_mask; + + /* Get the interrupt sources triggered by VFs, except for those already disabled */ + vf_mask = adf_disable_pending_vf2pf_interrupts(accel_dev); + if (vf_mask) { + struct adf_accel_vf_info *vf_info; + int i; + + /* + * Handle VF2PF interrupt unless the VF is malicious and + * is attempting to flood the host OS with VF2PF interrupts. + */ + for_each_set_bit(i, &vf_mask, ADF_MAX_NUM_VFS) { + vf_info = accel_dev->pf.vf_info + i; + + if (!__ratelimit(&vf_info->vf2pf_ratelimit)) { + dev_info(&GET_DEV(accel_dev), + "Too many ints from VF%d\n", + vf_info->vf_nr); + continue; + } + + adf_schedule_vf2pf_handler(vf_info); + irq_handled = true; + } + } + return irq_handled; +} +#endif /* CONFIG_PCI_IOV */ + +static bool adf_handle_pm_int(struct adf_accel_dev *accel_dev) +{ + struct adf_hw_device_data *hw_data = accel_dev->hw_device; + + if (hw_data->handle_pm_interrupt && + hw_data->handle_pm_interrupt(accel_dev)) + return true; + + return false; +} + +static irqreturn_t adf_msix_isr_ae(int irq, void *dev_ptr) +{ + struct adf_accel_dev *accel_dev = dev_ptr; + +#ifdef CONFIG_PCI_IOV + /* If SR-IOV is enabled (vf_info is non-NULL), check for VF->PF ints */ + if (accel_dev->pf.vf_info && adf_handle_vf2pf_int(accel_dev)) + return IRQ_HANDLED; +#endif /* CONFIG_PCI_IOV */ + + if (adf_handle_pm_int(accel_dev)) + return IRQ_HANDLED; + + dev_dbg(&GET_DEV(accel_dev), "qat_dev%d spurious AE interrupt\n", + accel_dev->accel_id); + + return IRQ_NONE; +} + +static void adf_free_irqs(struct adf_accel_dev *accel_dev) +{ + struct adf_accel_pci *pci_dev_info = &accel_dev->accel_pci_dev; + struct adf_hw_device_data *hw_data = accel_dev->hw_device; + struct adf_irq *irqs = pci_dev_info->msix_entries.irqs; + struct adf_etr_data *etr_data = accel_dev->transport; + int clust_irq = hw_data->num_banks; + int irq, i = 0; + + if (pci_dev_info->msix_entries.num_entries > 1) { + for (i = 0; i < hw_data->num_banks; i++) { + if (irqs[i].enabled) { + irq = pci_irq_vector(pci_dev_info->pci_dev, i); + irq_set_affinity_hint(irq, NULL); + free_irq(irq, &etr_data->banks[i]); + } + } + } + + if (irqs[i].enabled) { + irq = pci_irq_vector(pci_dev_info->pci_dev, clust_irq); + free_irq(irq, accel_dev); + } +} + +static int adf_request_irqs(struct adf_accel_dev *accel_dev) +{ + struct adf_accel_pci *pci_dev_info = &accel_dev->accel_pci_dev; + struct adf_hw_device_data *hw_data = accel_dev->hw_device; + struct adf_irq *irqs = pci_dev_info->msix_entries.irqs; + struct adf_etr_data *etr_data = accel_dev->transport; + int clust_irq = hw_data->num_banks; + int ret, irq, i = 0; + char *name; + + /* Request msix irq for all banks unless SR-IOV enabled */ + if (!accel_dev->pf.vf_info) { + for (i = 0; i < hw_data->num_banks; i++) { + struct adf_etr_bank_data *bank = &etr_data->banks[i]; + unsigned int cpu, cpus = num_online_cpus(); + + name = irqs[i].name; + snprintf(name, ADF_MAX_MSIX_VECTOR_NAME, + "qat%d-bundle%d", accel_dev->accel_id, i); + irq = pci_irq_vector(pci_dev_info->pci_dev, i); + if (unlikely(irq < 0)) { + dev_err(&GET_DEV(accel_dev), + "Failed to get IRQ number of device vector %d - %s\n", + i, name); + ret = irq; + goto err; + } + ret = request_irq(irq, adf_msix_isr_bundle, 0, + &name[0], bank); + if (ret) { + dev_err(&GET_DEV(accel_dev), + "Failed to allocate IRQ %d for %s\n", + irq, name); + goto err; + } + + cpu = ((accel_dev->accel_id * hw_data->num_banks) + + i) % cpus; + irq_set_affinity_hint(irq, get_cpu_mask(cpu)); + irqs[i].enabled = true; + } + } + + /* Request msix irq for AE */ + name = irqs[i].name; + snprintf(name, ADF_MAX_MSIX_VECTOR_NAME, + "qat%d-ae-cluster", accel_dev->accel_id); + irq = pci_irq_vector(pci_dev_info->pci_dev, clust_irq); + if (unlikely(irq < 0)) { + dev_err(&GET_DEV(accel_dev), + "Failed to get IRQ number of device vector %d - %s\n", + i, name); + ret = irq; + goto err; + } + ret = request_irq(irq, adf_msix_isr_ae, 0, &name[0], accel_dev); + if (ret) { + dev_err(&GET_DEV(accel_dev), + "Failed to allocate IRQ %d for %s\n", irq, name); + goto err; + } + irqs[i].enabled = true; + return ret; +err: + adf_free_irqs(accel_dev); + return ret; +} + +static int adf_isr_alloc_msix_vectors_data(struct adf_accel_dev *accel_dev) +{ + struct adf_hw_device_data *hw_data = accel_dev->hw_device; + u32 msix_num_entries = 1; + struct adf_irq *irqs; + + /* If SR-IOV is disabled (vf_info is NULL), add entries for each bank */ + if (!accel_dev->pf.vf_info) + msix_num_entries += hw_data->num_banks; + + irqs = kzalloc_node(msix_num_entries * sizeof(*irqs), + GFP_KERNEL, dev_to_node(&GET_DEV(accel_dev))); + if (!irqs) + return -ENOMEM; + + accel_dev->accel_pci_dev.msix_entries.num_entries = msix_num_entries; + accel_dev->accel_pci_dev.msix_entries.irqs = irqs; + return 0; +} + +static void adf_isr_free_msix_vectors_data(struct adf_accel_dev *accel_dev) +{ + kfree(accel_dev->accel_pci_dev.msix_entries.irqs); + accel_dev->accel_pci_dev.msix_entries.irqs = NULL; +} + +static int adf_setup_bh(struct adf_accel_dev *accel_dev) +{ + struct adf_etr_data *priv_data = accel_dev->transport; + struct adf_hw_device_data *hw_data = accel_dev->hw_device; + int i; + + for (i = 0; i < hw_data->num_banks; i++) + tasklet_init(&priv_data->banks[i].resp_handler, + adf_response_handler, + (unsigned long)&priv_data->banks[i]); + return 0; +} + +static void adf_cleanup_bh(struct adf_accel_dev *accel_dev) +{ + struct adf_etr_data *priv_data = accel_dev->transport; + struct adf_hw_device_data *hw_data = accel_dev->hw_device; + int i; + + for (i = 0; i < hw_data->num_banks; i++) { + tasklet_disable(&priv_data->banks[i].resp_handler); + tasklet_kill(&priv_data->banks[i].resp_handler); + } +} + +/** + * adf_isr_resource_free() - Free IRQ for acceleration device + * @accel_dev: Pointer to acceleration device. + * + * Function frees interrupts for acceleration device. + */ +void adf_isr_resource_free(struct adf_accel_dev *accel_dev) +{ + adf_free_irqs(accel_dev); + adf_cleanup_bh(accel_dev); + adf_disable_msix(&accel_dev->accel_pci_dev); + adf_isr_free_msix_vectors_data(accel_dev); +} +EXPORT_SYMBOL_GPL(adf_isr_resource_free); + +/** + * adf_isr_resource_alloc() - Allocate IRQ for acceleration device + * @accel_dev: Pointer to acceleration device. + * + * Function allocates interrupts for acceleration device. + * + * Return: 0 on success, error code otherwise. + */ +int adf_isr_resource_alloc(struct adf_accel_dev *accel_dev) +{ + int ret; + + ret = adf_isr_alloc_msix_vectors_data(accel_dev); + if (ret) + goto err_out; + + ret = adf_enable_msix(accel_dev); + if (ret) + goto err_free_msix_table; + + ret = adf_setup_bh(accel_dev); + if (ret) + goto err_disable_msix; + + ret = adf_request_irqs(accel_dev); + if (ret) + goto err_cleanup_bh; + + return 0; + +err_cleanup_bh: + adf_cleanup_bh(accel_dev); + +err_disable_msix: + adf_disable_msix(&accel_dev->accel_pci_dev); + +err_free_msix_table: + adf_isr_free_msix_vectors_data(accel_dev); + +err_out: + return ret; +} +EXPORT_SYMBOL_GPL(adf_isr_resource_alloc); + +/** + * adf_init_misc_wq() - Init misc workqueue + * + * Function init workqueue 'qat_misc_wq' for general purpose. + * + * Return: 0 on success, error code otherwise. + */ +int __init adf_init_misc_wq(void) +{ + adf_misc_wq = alloc_workqueue("qat_misc_wq", WQ_MEM_RECLAIM, 0); + + return !adf_misc_wq ? -ENOMEM : 0; +} + +void adf_exit_misc_wq(void) +{ + if (adf_misc_wq) + destroy_workqueue(adf_misc_wq); + + adf_misc_wq = NULL; +} + +bool adf_misc_wq_queue_work(struct work_struct *work) +{ + return queue_work(adf_misc_wq, work); +} + +bool adf_misc_wq_queue_delayed_work(struct delayed_work *work, + unsigned long delay) +{ + return queue_delayed_work(adf_misc_wq, work, delay); +} |