diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-12-15 14:52:16 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-12-15 14:52:16 -0300 |
commit | 8d91c1e411f55d7ea91b1183a2e9f8088fb4d5be (patch) | |
tree | e9891aa6c295060d065adffd610c4f49ecf884f3 /drivers/crypto/qat/qat_dh895xcc/adf_isr.c | |
parent | a71852147516bc1cb5b0b3cbd13639bfd4022dc8 (diff) |
Linux-libre 4.3.2-gnu
Diffstat (limited to 'drivers/crypto/qat/qat_dh895xcc/adf_isr.c')
-rw-r--r-- | drivers/crypto/qat/qat_dh895xcc/adf_isr.c | 139 |
1 files changed, 103 insertions, 36 deletions
diff --git a/drivers/crypto/qat/qat_dh895xcc/adf_isr.c b/drivers/crypto/qat/qat_dh895xcc/adf_isr.c index 0d03c109c..5570f7879 100644 --- a/drivers/crypto/qat/qat_dh895xcc/adf_isr.c +++ b/drivers/crypto/qat/qat_dh895xcc/adf_isr.c @@ -59,21 +59,30 @@ #include <adf_transport_access_macros.h> #include <adf_transport_internal.h> #include "adf_drv.h" +#include "adf_dh895xcc_hw_data.h" 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; - uint32_t msix_num_entries = hw_data->num_banks + 1; - int i; - - for (i = 0; i < msix_num_entries; i++) - pci_dev_info->msix_entries.entries[i].entry = i; + u32 msix_num_entries = 1; + + /* If SR-IOV is disabled, add entries for each bank */ + if (!accel_dev->pf.vf_info) { + int i; + + msix_num_entries += hw_data->num_banks; + for (i = 0; i < msix_num_entries; i++) + pci_dev_info->msix_entries.entries[i].entry = i; + } else { + pci_dev_info->msix_entries.entries[0].entry = + hw_data->num_banks; + } if (pci_enable_msix_exact(pci_dev_info->pci_dev, pci_dev_info->msix_entries.entries, msix_num_entries)) { - dev_err(&GET_DEV(accel_dev), "Failed to enable MSIX IRQ\n"); + dev_err(&GET_DEV(accel_dev), "Failed to enable MSI-X IRQ(s)\n"); return -EFAULT; } return 0; @@ -97,9 +106,58 @@ static irqreturn_t adf_msix_isr_ae(int irq, void *dev_ptr) { struct adf_accel_dev *accel_dev = dev_ptr; - dev_info(&GET_DEV(accel_dev), "qat_dev%d spurious AE interrupt\n", - accel_dev->accel_id); - return IRQ_HANDLED; +#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) { + void __iomem *pmisc_bar_addr = + (&GET_BARS(accel_dev)[ADF_DH895XCC_PMISC_BAR])->virt_addr; + u32 vf_mask; + + /* Get the interrupt sources triggered by VFs */ + vf_mask = ((ADF_CSR_RD(pmisc_bar_addr, ADF_DH895XCC_ERRSOU5) & + 0x0000FFFF) << 16) | + ((ADF_CSR_RD(pmisc_bar_addr, ADF_DH895XCC_ERRSOU3) & + 0x01FFFE00) >> 9); + + if (vf_mask) { + struct adf_accel_vf_info *vf_info; + bool irq_handled = false; + int i; + + /* Disable VF2PF interrupts for VFs with pending ints */ + adf_disable_vf2pf_interrupts(accel_dev, vf_mask); + + /* + * Schedule tasklets to handle VF2PF interrupt BHs + * unless the VF is malicious and is attempting to + * flood the host OS with VF2PF interrupts. + */ + for_each_set_bit(i, (const unsigned long *)&vf_mask, + (sizeof(vf_mask) * BITS_PER_BYTE)) { + 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 + 1); + continue; + } + + /* Tasklet will re-enable ints from this VF */ + tasklet_hi_schedule(&vf_info->vf2pf_bh_tasklet); + irq_handled = true; + } + + if (irq_handled) + return IRQ_HANDLED; + } + } +#endif /* CONFIG_PCI_IOV */ + + dev_dbg(&GET_DEV(accel_dev), "qat_dev%d spurious AE interrupt\n", + accel_dev->accel_id); + + return IRQ_NONE; } static int adf_request_irqs(struct adf_accel_dev *accel_dev) @@ -108,28 +166,32 @@ static int adf_request_irqs(struct adf_accel_dev *accel_dev) struct adf_hw_device_data *hw_data = accel_dev->hw_device; struct msix_entry *msixe = pci_dev_info->msix_entries.entries; struct adf_etr_data *etr_data = accel_dev->transport; - int ret, i; + int ret, i = 0; char *name; - /* Request msix irq for all banks */ - 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 = *(pci_dev_info->msix_entries.names + i); - snprintf(name, ADF_MAX_MSIX_VECTOR_NAME, - "qat%d-bundle%d", accel_dev->accel_id, i); - ret = request_irq(msixe[i].vector, - adf_msix_isr_bundle, 0, name, bank); - if (ret) { - dev_err(&GET_DEV(accel_dev), - "failed to enable irq %d for %s\n", - msixe[i].vector, name); - return ret; + /* 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 = *(pci_dev_info->msix_entries.names + i); + snprintf(name, ADF_MAX_MSIX_VECTOR_NAME, + "qat%d-bundle%d", accel_dev->accel_id, i); + ret = request_irq(msixe[i].vector, + adf_msix_isr_bundle, 0, name, bank); + if (ret) { + dev_err(&GET_DEV(accel_dev), + "failed to enable irq %d for %s\n", + msixe[i].vector, name); + return ret; + } + + cpu = ((accel_dev->accel_id * hw_data->num_banks) + + i) % cpus; + irq_set_affinity_hint(msixe[i].vector, + get_cpu_mask(cpu)); } - - cpu = ((accel_dev->accel_id * hw_data->num_banks) + i) % cpus; - irq_set_affinity_hint(msixe[i].vector, get_cpu_mask(cpu)); } /* Request msix irq for AE */ @@ -152,11 +214,13 @@ static void adf_free_irqs(struct adf_accel_dev *accel_dev) struct adf_hw_device_data *hw_data = accel_dev->hw_device; struct msix_entry *msixe = pci_dev_info->msix_entries.entries; struct adf_etr_data *etr_data = accel_dev->transport; - int i; + int i = 0; - for (i = 0; i < hw_data->num_banks; i++) { - irq_set_affinity_hint(msixe[i].vector, NULL); - free_irq(msixe[i].vector, &etr_data->banks[i]); + if (pci_dev_info->msix_entries.num_entries > 1) { + for (i = 0; i < hw_data->num_banks; i++) { + irq_set_affinity_hint(msixe[i].vector, NULL); + free_irq(msixe[i].vector, &etr_data->banks[i]); + } } irq_set_affinity_hint(msixe[i].vector, NULL); free_irq(msixe[i].vector, accel_dev); @@ -168,7 +232,11 @@ static int adf_isr_alloc_msix_entry_table(struct adf_accel_dev *accel_dev) char **names; struct msix_entry *entries; struct adf_hw_device_data *hw_data = accel_dev->hw_device; - uint32_t msix_num_entries = hw_data->num_banks + 1; + u32 msix_num_entries = 1; + + /* 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; entries = kzalloc_node(msix_num_entries * sizeof(*entries), GFP_KERNEL, dev_to_node(&GET_DEV(accel_dev))); @@ -185,6 +253,7 @@ static int adf_isr_alloc_msix_entry_table(struct adf_accel_dev *accel_dev) if (!(*(names + i))) goto err; } + accel_dev->accel_pci_dev.msix_entries.num_entries = msix_num_entries; accel_dev->accel_pci_dev.msix_entries.entries = entries; accel_dev->accel_pci_dev.msix_entries.names = names; return 0; @@ -198,13 +267,11 @@ err: static void adf_isr_free_msix_entry_table(struct adf_accel_dev *accel_dev) { - struct adf_hw_device_data *hw_data = accel_dev->hw_device; - uint32_t msix_num_entries = hw_data->num_banks + 1; char **names = accel_dev->accel_pci_dev.msix_entries.names; int i; kfree(accel_dev->accel_pci_dev.msix_entries.entries); - for (i = 0; i < msix_num_entries; i++) + for (i = 0; i < accel_dev->accel_pci_dev.msix_entries.num_entries; i++) kfree(*(names + i)); kfree(names); } |