mirror of https://gitee.com/openkylin/linux.git
348 lines
8.5 KiB
C
348 lines
8.5 KiB
C
/*
|
|
* Intel MIC Platform Software Stack (MPSS)
|
|
*
|
|
* Copyright(c) 2013 Intel Corporation.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License, version 2, as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that 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".
|
|
*
|
|
* Intel MIC Host driver.
|
|
*/
|
|
#include <linux/fs.h>
|
|
#include <linux/module.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/poll.h>
|
|
|
|
#include <linux/mic_common.h>
|
|
#include "../common/mic_dev.h"
|
|
#include "mic_device.h"
|
|
#include "mic_x100.h"
|
|
#include "mic_smpt.h"
|
|
|
|
static const char mic_driver_name[] = "mic";
|
|
|
|
static const struct pci_device_id mic_pci_tbl[] = {
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2250)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2251)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2252)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2253)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2254)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2255)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2256)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2257)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2258)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2259)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225a)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225b)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225c)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225d)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225e)},
|
|
|
|
/* required last entry */
|
|
{ 0, }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pci, mic_pci_tbl);
|
|
|
|
/* ID allocator for MIC devices */
|
|
static struct ida g_mic_ida;
|
|
|
|
/* Initialize the device page */
|
|
static int mic_dp_init(struct mic_device *mdev)
|
|
{
|
|
mdev->dp = kzalloc(MIC_DP_SIZE, GFP_KERNEL);
|
|
if (!mdev->dp)
|
|
return -ENOMEM;
|
|
|
|
mdev->dp_dma_addr = mic_map_single(mdev,
|
|
mdev->dp, MIC_DP_SIZE);
|
|
if (mic_map_error(mdev->dp_dma_addr)) {
|
|
kfree(mdev->dp);
|
|
dev_err(&mdev->pdev->dev, "%s %d err %d\n",
|
|
__func__, __LINE__, -ENOMEM);
|
|
return -ENOMEM;
|
|
}
|
|
mdev->ops->write_spad(mdev, MIC_DPLO_SPAD, mdev->dp_dma_addr);
|
|
mdev->ops->write_spad(mdev, MIC_DPHI_SPAD, mdev->dp_dma_addr >> 32);
|
|
return 0;
|
|
}
|
|
|
|
/* Uninitialize the device page */
|
|
static void mic_dp_uninit(struct mic_device *mdev)
|
|
{
|
|
mic_unmap_single(mdev, mdev->dp_dma_addr, MIC_DP_SIZE);
|
|
kfree(mdev->dp);
|
|
}
|
|
|
|
/**
|
|
* mic_ops_init: Initialize HW specific operation tables.
|
|
*
|
|
* @mdev: pointer to mic_device instance
|
|
*
|
|
* returns none.
|
|
*/
|
|
static void mic_ops_init(struct mic_device *mdev)
|
|
{
|
|
switch (mdev->family) {
|
|
case MIC_FAMILY_X100:
|
|
mdev->ops = &mic_x100_ops;
|
|
mdev->intr_ops = &mic_x100_intr_ops;
|
|
mdev->smpt_ops = &mic_x100_smpt_ops;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* mic_get_family - Determine hardware family to which this MIC belongs.
|
|
*
|
|
* @pdev: The pci device structure
|
|
*
|
|
* returns family.
|
|
*/
|
|
static enum mic_hw_family mic_get_family(struct pci_dev *pdev)
|
|
{
|
|
enum mic_hw_family family;
|
|
|
|
switch (pdev->device) {
|
|
case MIC_X100_PCI_DEVICE_2250:
|
|
case MIC_X100_PCI_DEVICE_2251:
|
|
case MIC_X100_PCI_DEVICE_2252:
|
|
case MIC_X100_PCI_DEVICE_2253:
|
|
case MIC_X100_PCI_DEVICE_2254:
|
|
case MIC_X100_PCI_DEVICE_2255:
|
|
case MIC_X100_PCI_DEVICE_2256:
|
|
case MIC_X100_PCI_DEVICE_2257:
|
|
case MIC_X100_PCI_DEVICE_2258:
|
|
case MIC_X100_PCI_DEVICE_2259:
|
|
case MIC_X100_PCI_DEVICE_225a:
|
|
case MIC_X100_PCI_DEVICE_225b:
|
|
case MIC_X100_PCI_DEVICE_225c:
|
|
case MIC_X100_PCI_DEVICE_225d:
|
|
case MIC_X100_PCI_DEVICE_225e:
|
|
family = MIC_FAMILY_X100;
|
|
break;
|
|
default:
|
|
family = MIC_FAMILY_UNKNOWN;
|
|
break;
|
|
}
|
|
return family;
|
|
}
|
|
|
|
/**
|
|
* mic_device_init - Allocates and initializes the MIC device structure
|
|
*
|
|
* @mdev: pointer to mic_device instance
|
|
* @pdev: The pci device structure
|
|
*
|
|
* returns none.
|
|
*/
|
|
static void
|
|
mic_device_init(struct mic_device *mdev, struct pci_dev *pdev)
|
|
{
|
|
mdev->pdev = pdev;
|
|
mdev->family = mic_get_family(pdev);
|
|
mdev->stepping = pdev->revision;
|
|
mic_ops_init(mdev);
|
|
mutex_init(&mdev->mic_mutex);
|
|
mdev->irq_info.next_avail_src = 0;
|
|
}
|
|
|
|
/**
|
|
* mic_probe - Device Initialization Routine
|
|
*
|
|
* @pdev: PCI device structure
|
|
* @ent: entry in mic_pci_tbl
|
|
*
|
|
* returns 0 on success, < 0 on failure.
|
|
*/
|
|
static int mic_probe(struct pci_dev *pdev,
|
|
const struct pci_device_id *ent)
|
|
{
|
|
int rc;
|
|
struct mic_device *mdev;
|
|
|
|
mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
|
|
if (!mdev) {
|
|
rc = -ENOMEM;
|
|
dev_err(&pdev->dev, "mdev kmalloc failed rc %d\n", rc);
|
|
goto mdev_alloc_fail;
|
|
}
|
|
mdev->id = ida_simple_get(&g_mic_ida, 0, MIC_MAX_NUM_DEVS, GFP_KERNEL);
|
|
if (mdev->id < 0) {
|
|
rc = mdev->id;
|
|
dev_err(&pdev->dev, "ida_simple_get failed rc %d\n", rc);
|
|
goto ida_fail;
|
|
}
|
|
|
|
mic_device_init(mdev, pdev);
|
|
|
|
rc = pci_enable_device(pdev);
|
|
if (rc) {
|
|
dev_err(&pdev->dev, "failed to enable pci device.\n");
|
|
goto ida_remove;
|
|
}
|
|
|
|
pci_set_master(pdev);
|
|
|
|
rc = pci_request_regions(pdev, mic_driver_name);
|
|
if (rc) {
|
|
dev_err(&pdev->dev, "failed to get pci regions.\n");
|
|
goto disable_device;
|
|
}
|
|
|
|
rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
|
|
if (rc) {
|
|
dev_err(&pdev->dev, "Cannot set DMA mask\n");
|
|
goto release_regions;
|
|
}
|
|
|
|
mdev->mmio.pa = pci_resource_start(pdev, mdev->ops->mmio_bar);
|
|
mdev->mmio.len = pci_resource_len(pdev, mdev->ops->mmio_bar);
|
|
mdev->mmio.va = pci_ioremap_bar(pdev, mdev->ops->mmio_bar);
|
|
if (!mdev->mmio.va) {
|
|
dev_err(&pdev->dev, "Cannot remap MMIO BAR\n");
|
|
rc = -EIO;
|
|
goto release_regions;
|
|
}
|
|
|
|
mdev->aper.pa = pci_resource_start(pdev, mdev->ops->aper_bar);
|
|
mdev->aper.len = pci_resource_len(pdev, mdev->ops->aper_bar);
|
|
mdev->aper.va = ioremap_wc(mdev->aper.pa, mdev->aper.len);
|
|
if (!mdev->aper.va) {
|
|
dev_err(&pdev->dev, "Cannot remap Aperture BAR\n");
|
|
rc = -EIO;
|
|
goto unmap_mmio;
|
|
}
|
|
|
|
mdev->intr_ops->intr_init(mdev);
|
|
rc = mic_setup_interrupts(mdev, pdev);
|
|
if (rc) {
|
|
dev_err(&pdev->dev, "mic_setup_interrupts failed %d\n", rc);
|
|
goto unmap_aper;
|
|
}
|
|
rc = mic_smpt_init(mdev);
|
|
if (rc) {
|
|
dev_err(&pdev->dev, "smpt_init failed %d\n", rc);
|
|
goto free_interrupts;
|
|
}
|
|
|
|
pci_set_drvdata(pdev, mdev);
|
|
|
|
rc = mic_dp_init(mdev);
|
|
if (rc) {
|
|
dev_err(&pdev->dev, "mic_dp_init failed rc %d\n", rc);
|
|
goto smpt_uninit;
|
|
}
|
|
mic_bootparam_init(mdev);
|
|
mic_create_debug_dir(mdev);
|
|
|
|
mdev->cosm_dev = cosm_register_device(&mdev->pdev->dev, &cosm_hw_ops);
|
|
if (IS_ERR(mdev->cosm_dev)) {
|
|
rc = PTR_ERR(mdev->cosm_dev);
|
|
dev_err(&pdev->dev, "cosm_add_device failed rc %d\n", rc);
|
|
goto cleanup_debug_dir;
|
|
}
|
|
return 0;
|
|
cleanup_debug_dir:
|
|
mic_delete_debug_dir(mdev);
|
|
mic_dp_uninit(mdev);
|
|
smpt_uninit:
|
|
mic_smpt_uninit(mdev);
|
|
free_interrupts:
|
|
mic_free_interrupts(mdev, pdev);
|
|
unmap_aper:
|
|
iounmap(mdev->aper.va);
|
|
unmap_mmio:
|
|
iounmap(mdev->mmio.va);
|
|
release_regions:
|
|
pci_release_regions(pdev);
|
|
disable_device:
|
|
pci_disable_device(pdev);
|
|
ida_remove:
|
|
ida_simple_remove(&g_mic_ida, mdev->id);
|
|
ida_fail:
|
|
kfree(mdev);
|
|
mdev_alloc_fail:
|
|
dev_err(&pdev->dev, "Probe failed rc %d\n", rc);
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* mic_remove - Device Removal Routine
|
|
* mic_remove is called by the PCI subsystem to alert the driver
|
|
* that it should release a PCI device.
|
|
*
|
|
* @pdev: PCI device structure
|
|
*/
|
|
static void mic_remove(struct pci_dev *pdev)
|
|
{
|
|
struct mic_device *mdev;
|
|
|
|
mdev = pci_get_drvdata(pdev);
|
|
if (!mdev)
|
|
return;
|
|
|
|
cosm_unregister_device(mdev->cosm_dev);
|
|
mic_delete_debug_dir(mdev);
|
|
mic_dp_uninit(mdev);
|
|
mic_smpt_uninit(mdev);
|
|
mic_free_interrupts(mdev, pdev);
|
|
iounmap(mdev->aper.va);
|
|
iounmap(mdev->mmio.va);
|
|
pci_release_regions(pdev);
|
|
pci_disable_device(pdev);
|
|
ida_simple_remove(&g_mic_ida, mdev->id);
|
|
kfree(mdev);
|
|
}
|
|
|
|
static struct pci_driver mic_driver = {
|
|
.name = mic_driver_name,
|
|
.id_table = mic_pci_tbl,
|
|
.probe = mic_probe,
|
|
.remove = mic_remove
|
|
};
|
|
|
|
static int __init mic_init(void)
|
|
{
|
|
int ret;
|
|
|
|
request_module("mic_x100_dma");
|
|
mic_init_debugfs();
|
|
ida_init(&g_mic_ida);
|
|
ret = pci_register_driver(&mic_driver);
|
|
if (ret) {
|
|
pr_err("pci_register_driver failed ret %d\n", ret);
|
|
goto cleanup_debugfs;
|
|
}
|
|
return 0;
|
|
cleanup_debugfs:
|
|
ida_destroy(&g_mic_ida);
|
|
mic_exit_debugfs();
|
|
return ret;
|
|
}
|
|
|
|
static void __exit mic_exit(void)
|
|
{
|
|
pci_unregister_driver(&mic_driver);
|
|
ida_destroy(&g_mic_ida);
|
|
mic_exit_debugfs();
|
|
}
|
|
|
|
module_init(mic_init);
|
|
module_exit(mic_exit);
|
|
|
|
MODULE_AUTHOR("Intel Corporation");
|
|
MODULE_DESCRIPTION("Intel(R) MIC X100 Host driver");
|
|
MODULE_LICENSE("GPL v2");
|