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linux/drivers/misc/mic/host/mic_main.c
Ashutosh Dixit 1da2b3eeef misc: mic: Remove COSM functionality from the MIC host driver 
Since COSM functionality is now moved into a separate COSM driver
drivers, this patch removes this functionality from the base MIC host
driver. The MIC host driver now implements cosm_hw_ops and registers a
COSM device which allows the COSM driver to trigger
boot/shutdown/reset of the MIC devices via the cosm_hw_ops.

Reviewed-by: Nikhil Rao <nikhil.rao@intel.com>
Reviewed-by: Sudeep Dutt <sudeep.dutt@intel.com>
Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-10-04 12:46:06 +01:00

387 lines
9.5 KiB
C
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/*
* 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"
#include "mic_fops.h"
#include "mic_virtio.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;
/* Base device node number for MIC devices */
static dev_t g_mic_devno;
static const struct file_operations mic_fops = {
.open = mic_open,
.release = mic_release,
.unlocked_ioctl = mic_ioctl,
.poll = mic_poll,
.mmap = mic_mmap,
.owner = THIS_MODULE,
};
/* 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;
INIT_LIST_HEAD(&mdev->vdev_list);
}
/**
* 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->miscdev.minor = MISC_DYNAMIC_MINOR;
snprintf(mdev->name, sizeof(mdev->name), "mic%d", mdev->id);
mdev->miscdev.name = mdev->name;
mdev->miscdev.fops = &mic_fops;
mdev->miscdev.parent = &mdev->pdev->dev;
rc = misc_register(&mdev->miscdev);
if (rc) {
dev_err(&pdev->dev, "misc_register err id %d rc %d\n",
mdev->id, rc);
goto cleanup_debug_dir;
}
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 misc_dereg;
}
return 0;
misc_dereg:
misc_deregister(&mdev->miscdev);
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);
misc_deregister(&mdev->miscdev);
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;
ret = alloc_chrdev_region(&g_mic_devno, 0,
MIC_MAX_NUM_DEVS, mic_driver_name);
if (ret) {
pr_err("alloc_chrdev_region failed ret %d\n", ret);
goto error;
}
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_chrdev;
}
return ret;
cleanup_chrdev:
ida_destroy(&g_mic_ida);
mic_exit_debugfs();
unregister_chrdev_region(g_mic_devno, MIC_MAX_NUM_DEVS);
error:
return ret;
}
static void __exit mic_exit(void)
{
pci_unregister_driver(&mic_driver);
ida_destroy(&g_mic_ida);
mic_exit_debugfs();
unregister_chrdev_region(g_mic_devno, MIC_MAX_NUM_DEVS);
}
module_init(mic_init);
module_exit(mic_exit);
MODULE_AUTHOR("Intel Corporation");
MODULE_DESCRIPTION("Intel(R) MIC X100 Host driver");
MODULE_LICENSE("GPL v2");
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