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/* Intel Ethernet Switch Host Interface Driver
* Copyright(c) 2013 - 2014 Intel Corporation.
*
* 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.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*
* Contact Information:
* e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*/
#include <linux/module.h>
#include "fm10k.h"
/**
* fm10k_pci_tbl - PCI Device ID Table
*
* Wildcard entries (PCI_ANY_ID) should come last
* Last entry must be all 0s
*
* { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
* Class, Class Mask, private data (not used) }
*/
static const struct pci_device_id fm10k_pci_tbl[] = {
{ PCI_VDEVICE(INTEL, FM10K_DEV_ID_PF) },
/* required last entry */
{ 0, }
};
MODULE_DEVICE_TABLE(pci, fm10k_pci_tbl);
u16 fm10k_read_pci_cfg_word(struct fm10k_hw *hw, u32 reg)
{
struct fm10k_intfc *interface = hw->back;
u16 value = 0;
if (FM10K_REMOVED(hw->hw_addr))
return ~value;
pci_read_config_word(interface->pdev, reg, &value);
if (value == 0xFFFF)
fm10k_write_flush(hw);
return value;
}
u32 fm10k_read_reg(struct fm10k_hw *hw, int reg)
{
u32 __iomem *hw_addr = ACCESS_ONCE(hw->hw_addr);
u32 value = 0;
if (FM10K_REMOVED(hw_addr))
return ~value;
value = readl(&hw_addr[reg]);
if (!(~value) && (!reg || !(~readl(hw_addr))))
hw->hw_addr = NULL;
return value;
}
/**
* fm10k_probe - Device Initialization Routine
* @pdev: PCI device information struct
* @ent: entry in fm10k_pci_tbl
*
* Returns 0 on success, negative on failure
*
* fm10k_probe initializes an interface identified by a pci_dev structure.
* The OS initialization, configuring of the interface private structure,
* and a hardware reset occur.
**/
static int fm10k_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
int err;
u64 dma_mask;
err = pci_enable_device_mem(pdev);
if (err)
return err;
/* By default fm10k only supports a 48 bit DMA mask */
dma_mask = DMA_BIT_MASK(48) | dma_get_required_mask(&pdev->dev);
if ((dma_mask <= DMA_BIT_MASK(32)) ||
dma_set_mask_and_coherent(&pdev->dev, dma_mask)) {
dma_mask &= DMA_BIT_MASK(32);
err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
if (err) {
err = dma_set_coherent_mask(&pdev->dev,
DMA_BIT_MASK(32));
if (err) {
dev_err(&pdev->dev,
"No usable DMA configuration, aborting\n");
goto err_dma;
}
}
}
err = pci_request_selected_regions(pdev,
pci_select_bars(pdev,
IORESOURCE_MEM),
fm10k_driver_name);
if (err) {
dev_err(&pdev->dev,
"pci_request_selected_regions failed 0x%x\n", err);
goto err_pci_reg;
}
pci_set_master(pdev);
pci_save_state(pdev);
return 0;
err_pci_reg:
err_dma:
pci_disable_device(pdev);
return err;
}
/**
* fm10k_remove - Device Removal Routine
* @pdev: PCI device information struct
*
* fm10k_remove is called by the PCI subsystem to alert the driver
* that it should release a PCI device. The could be caused by a
* Hot-Plug event, or because the driver is going to be removed from
* memory.
**/
static void fm10k_remove(struct pci_dev *pdev)
{
pci_release_selected_regions(pdev,
pci_select_bars(pdev, IORESOURCE_MEM));
pci_disable_device(pdev);
}
static struct pci_driver fm10k_driver = {
.name = fm10k_driver_name,
.id_table = fm10k_pci_tbl,
.probe = fm10k_probe,
.remove = fm10k_remove,
};
/**
* fm10k_register_pci_driver - register driver interface
*
* This funciton is called on module load in order to register the driver.
**/
int fm10k_register_pci_driver(void)
{
return pci_register_driver(&fm10k_driver);
}
/**
* fm10k_unregister_pci_driver - unregister driver interface
*
* This funciton is called on module unload in order to remove the driver.
**/
void fm10k_unregister_pci_driver(void)
{
pci_unregister_driver(&fm10k_driver);
}
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