diff options
Diffstat (limited to 'drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c')
| -rw-r--r-- | drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c | 292 |
1 files changed, 292 insertions, 0 deletions
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c b/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c new file mode 100644 index 000000000000..581de71a958a --- /dev/null +++ b/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c @@ -0,0 +1,292 @@ +/* + * aQuantia Corporation Network Driver + * Copyright (C) 2014-2017 aQuantia Corporation. All rights reserved + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + */ + +/* File aq_pci_func.c: Definition of PCI functions. */ + +#include "aq_pci_func.h" +#include "aq_nic.h" +#include "aq_vec.h" +#include "aq_hw.h" +#include <linux/interrupt.h> + +struct aq_pci_func_s { + struct pci_dev *pdev; + struct aq_nic_s *port[AQ_CFG_PCI_FUNC_PORTS]; + void __iomem *mmio; + void *aq_vec[AQ_CFG_PCI_FUNC_MSIX_IRQS]; + resource_size_t mmio_pa; + unsigned int msix_entry_mask; + unsigned int ports; + bool is_pci_enabled; + bool is_regions; + bool is_pci_using_dac; + struct aq_hw_caps_s aq_hw_caps; +}; + +struct aq_pci_func_s *aq_pci_func_alloc(struct aq_hw_ops *aq_hw_ops, + struct pci_dev *pdev, + const struct net_device_ops *ndev_ops, + const struct ethtool_ops *eth_ops) +{ + struct aq_pci_func_s *self = NULL; + int err = 0; + unsigned int port = 0U; + + if (!aq_hw_ops) { + err = -EFAULT; + goto err_exit; + } + self = kzalloc(sizeof(*self), GFP_KERNEL); + if (!self) { + err = -ENOMEM; + goto err_exit; + } + + pci_set_drvdata(pdev, self); + self->pdev = pdev; + + err = aq_hw_ops->get_hw_caps(NULL, &self->aq_hw_caps); + if (err < 0) + goto err_exit; + + self->ports = self->aq_hw_caps.ports; + + for (port = 0; port < self->ports; ++port) { + struct aq_nic_s *aq_nic = aq_nic_alloc_cold(ndev_ops, eth_ops, + &pdev->dev, self, + port, aq_hw_ops); + + if (!aq_nic) { + err = -ENOMEM; + goto err_exit; + } + self->port[port] = aq_nic; + } + +err_exit: + if (err < 0) { + if (self) + aq_pci_func_free(self); + self = NULL; + } + + (void)err; + return self; +} + +int aq_pci_func_init(struct aq_pci_func_s *self) +{ + int err = 0; + unsigned int bar = 0U; + unsigned int port = 0U; + + err = pci_enable_device(self->pdev); + if (err < 0) + goto err_exit; + + self->is_pci_enabled = true; + + err = pci_set_dma_mask(self->pdev, DMA_BIT_MASK(64)); + if (!err) { + err = pci_set_consistent_dma_mask(self->pdev, DMA_BIT_MASK(64)); + self->is_pci_using_dac = 1; + } + if (err) { + err = pci_set_dma_mask(self->pdev, DMA_BIT_MASK(32)); + if (!err) + err = pci_set_consistent_dma_mask(self->pdev, + DMA_BIT_MASK(32)); + self->is_pci_using_dac = 0; + } + if (err != 0) { + err = -ENOSR; + goto err_exit; + } + + err = pci_request_regions(self->pdev, AQ_CFG_DRV_NAME "_mmio"); + if (err < 0) + goto err_exit; + + self->is_regions = true; + + pci_set_master(self->pdev); + + for (bar = 0; bar < 4; ++bar) { + if (IORESOURCE_MEM & pci_resource_flags(self->pdev, bar)) { + resource_size_t reg_sz; + + self->mmio_pa = pci_resource_start(self->pdev, bar); + if (self->mmio_pa == 0U) { + err = -EIO; + goto err_exit; + } + + reg_sz = pci_resource_len(self->pdev, bar); + if ((reg_sz <= 24 /*ATL_REGS_SIZE*/)) { + err = -EIO; + goto err_exit; + } + + self->mmio = ioremap_nocache(self->mmio_pa, reg_sz); + if (!self->mmio) { + err = -EIO; + goto err_exit; + } + break; + } + } + + /*enable interrupts */ +#if !AQ_CFG_FORCE_LEGACY_INT + err = pci_alloc_irq_vectors(self->pdev, self->aq_hw_caps.msix_irqs, + self->aq_hw_caps.msix_irqs, PCI_IRQ_MSIX); + + if (err < 0) { + err = pci_alloc_irq_vectors(self->pdev, 1, 1, + PCI_IRQ_MSI | PCI_IRQ_LEGACY); + if (err < 0) + goto err_exit; + } +#endif + + /* net device init */ + for (port = 0; port < self->ports; ++port) { + if (!self->port[port]) + continue; + + err = aq_nic_cfg_start(self->port[port]); + if (err < 0) + goto err_exit; + + err = aq_nic_ndev_init(self->port[port]); + if (err < 0) + goto err_exit; + + err = aq_nic_ndev_register(self->port[port]); + if (err < 0) + goto err_exit; + } + +err_exit: + if (err < 0) + aq_pci_func_deinit(self); + return err; +} + +int aq_pci_func_alloc_irq(struct aq_pci_func_s *self, unsigned int i, + char *name, void *aq_vec, cpumask_t *affinity_mask) +{ + struct pci_dev *pdev = self->pdev; + int err = 0; + + if (pdev->msix_enabled || pdev->msi_enabled) + err = request_irq(pci_irq_vector(pdev, i), aq_vec_isr, 0, + name, aq_vec); + else + err = request_irq(pci_irq_vector(pdev, i), aq_vec_isr_legacy, + IRQF_SHARED, name, aq_vec); + + if (err >= 0) { + self->msix_entry_mask |= (1 << i); + self->aq_vec[i] = aq_vec; + + if (pdev->msix_enabled) + irq_set_affinity_hint(pci_irq_vector(pdev, i), + affinity_mask); + } + + return err; +} + +void aq_pci_func_free_irqs(struct aq_pci_func_s *self) +{ + struct pci_dev *pdev = self->pdev; + unsigned int i = 0U; + + for (i = 32U; i--;) { + if (!((1U << i) & self->msix_entry_mask)) + continue; + + free_irq(pci_irq_vector(pdev, i), self->aq_vec[i]); + if (pdev->msix_enabled) + irq_set_affinity_hint(pci_irq_vector(pdev, i), NULL); + self->msix_entry_mask &= ~(1U << i); + } +} + +void __iomem *aq_pci_func_get_mmio(struct aq_pci_func_s *self) +{ + return self->mmio; +} + +unsigned int aq_pci_func_get_irq_type(struct aq_pci_func_s *self) +{ + if (self->pdev->msix_enabled) + return AQ_HW_IRQ_MSIX; + if (self->pdev->msi_enabled) + return AQ_HW_IRQ_MSIX; + return AQ_HW_IRQ_LEGACY; +} + +void aq_pci_func_deinit(struct aq_pci_func_s *self) +{ + if (!self) + goto err_exit; + + aq_pci_func_free_irqs(self); + pci_free_irq_vectors(self->pdev); + + if (self->is_regions) + pci_release_regions(self->pdev); + + if (self->is_pci_enabled) + pci_disable_device(self->pdev); + +err_exit:; +} + +void aq_pci_func_free(struct aq_pci_func_s *self) +{ + unsigned int port = 0U; + + if (!self) + goto err_exit; + + for (port = 0; port < self->ports; ++port) { + if (!self->port[port]) + continue; + + aq_nic_ndev_free(self->port[port]); + } + + kfree(self); + +err_exit:; +} + +int aq_pci_func_change_pm_state(struct aq_pci_func_s *self, + pm_message_t *pm_msg) +{ + int err = 0; + unsigned int port = 0U; + + if (!self) { + err = -EFAULT; + goto err_exit; + } + for (port = 0; port < self->ports; ++port) { + if (!self->port[port]) + continue; + + (void)aq_nic_change_pm_state(self->port[port], pm_msg); + } + +err_exit: + return err; +} |