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linux_dsm_epyc7002/drivers/misc/mic/host/mic_boot.c
Thomas Gleixner 4e43d779e5 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 290 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 39 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141901.397680977@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05 17:36:38 +02:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
* Intel MIC Platform Software Stack (MPSS)
*
* Copyright(c) 2013 Intel Corporation.
*
* Intel MIC Host driver.
*/
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/pci.h>
#include <linux/kmod.h>
#include <linux/mic_common.h>
#include <linux/mic_bus.h>
#include "../bus/scif_bus.h"
#include "../bus/vop_bus.h"
#include "../common/mic_dev.h"
#include "mic_device.h"
#include "mic_smpt.h"
static inline struct mic_device *vpdev_to_mdev(struct device *dev)
{
return dev_get_drvdata(dev->parent);
}
static dma_addr_t
_mic_dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction dir, unsigned long attrs)
{
void *va = phys_to_virt(page_to_phys(page)) + offset;
struct mic_device *mdev = vpdev_to_mdev(dev);
return mic_map_single(mdev, va, size);
}
static void _mic_dma_unmap_page(struct device *dev, dma_addr_t dma_addr,
size_t size, enum dma_data_direction dir,
unsigned long attrs)
{
struct mic_device *mdev = vpdev_to_mdev(dev);
mic_unmap_single(mdev, dma_addr, size);
}
static const struct dma_map_ops _mic_dma_ops = {
.map_page = _mic_dma_map_page,
.unmap_page = _mic_dma_unmap_page,
};
static struct mic_irq *
__mic_request_irq(struct vop_device *vpdev,
irqreturn_t (*func)(int irq, void *data),
const char *name, void *data, int intr_src)
{
struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev);
return mic_request_threaded_irq(mdev, func, NULL, name, data,
intr_src, MIC_INTR_DB);
}
static void __mic_free_irq(struct vop_device *vpdev,
struct mic_irq *cookie, void *data)
{
struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev);
mic_free_irq(mdev, cookie, data);
}
static void __mic_ack_interrupt(struct vop_device *vpdev, int num)
{
struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev);
mdev->ops->intr_workarounds(mdev);
}
static int __mic_next_db(struct vop_device *vpdev)
{
struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev);
return mic_next_db(mdev);
}
static void *__mic_get_dp(struct vop_device *vpdev)
{
struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev);
return mdev->dp;
}
static void __iomem *__mic_get_remote_dp(struct vop_device *vpdev)
{
return NULL;
}
static void __mic_send_intr(struct vop_device *vpdev, int db)
{
struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev);
mdev->ops->send_intr(mdev, db);
}
static void __iomem *__mic_ioremap(struct vop_device *vpdev,
dma_addr_t pa, size_t len)
{
struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev);
return mdev->aper.va + pa;
}
static void __mic_iounmap(struct vop_device *vpdev, void __iomem *va)
{
/* nothing to do */
}
static struct vop_hw_ops vop_hw_ops = {
.request_irq = __mic_request_irq,
.free_irq = __mic_free_irq,
.ack_interrupt = __mic_ack_interrupt,
.next_db = __mic_next_db,
.get_dp = __mic_get_dp,
.get_remote_dp = __mic_get_remote_dp,
.send_intr = __mic_send_intr,
.remap = __mic_ioremap,
.unmap = __mic_iounmap,
};
static inline struct mic_device *scdev_to_mdev(struct scif_hw_dev *scdev)
{
return dev_get_drvdata(scdev->dev.parent);
}
static void *__mic_dma_alloc(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp,
unsigned long attrs)
{
struct scif_hw_dev *scdev = dev_get_drvdata(dev);
struct mic_device *mdev = scdev_to_mdev(scdev);
dma_addr_t tmp;
void *va = kmalloc(size, gfp | __GFP_ZERO);
if (va) {
tmp = mic_map_single(mdev, va, size);
if (dma_mapping_error(dev, tmp)) {
kfree(va);
va = NULL;
} else {
*dma_handle = tmp;
}
}
return va;
}
static void __mic_dma_free(struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_handle, unsigned long attrs)
{
struct scif_hw_dev *scdev = dev_get_drvdata(dev);
struct mic_device *mdev = scdev_to_mdev(scdev);
mic_unmap_single(mdev, dma_handle, size);
kfree(vaddr);
}
static dma_addr_t
__mic_dma_map_page(struct device *dev, struct page *page, unsigned long offset,
size_t size, enum dma_data_direction dir,
unsigned long attrs)
{
void *va = phys_to_virt(page_to_phys(page)) + offset;
struct scif_hw_dev *scdev = dev_get_drvdata(dev);
struct mic_device *mdev = scdev_to_mdev(scdev);
return mic_map_single(mdev, va, size);
}
static void
__mic_dma_unmap_page(struct device *dev, dma_addr_t dma_addr,
size_t size, enum dma_data_direction dir,
unsigned long attrs)
{
struct scif_hw_dev *scdev = dev_get_drvdata(dev);
struct mic_device *mdev = scdev_to_mdev(scdev);
mic_unmap_single(mdev, dma_addr, size);
}
static int __mic_dma_map_sg(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction dir,
unsigned long attrs)
{
struct scif_hw_dev *scdev = dev_get_drvdata(dev);
struct mic_device *mdev = scdev_to_mdev(scdev);
struct scatterlist *s;
int i, j, ret;
dma_addr_t da;
ret = dma_map_sg(&mdev->pdev->dev, sg, nents, dir);
if (ret <= 0)
return 0;
for_each_sg(sg, s, nents, i) {
da = mic_map(mdev, sg_dma_address(s) + s->offset, s->length);
if (!da)
goto err;
sg_dma_address(s) = da;
}
return nents;
err:
for_each_sg(sg, s, i, j) {
mic_unmap(mdev, sg_dma_address(s), s->length);
sg_dma_address(s) = mic_to_dma_addr(mdev, sg_dma_address(s));
}
dma_unmap_sg(&mdev->pdev->dev, sg, nents, dir);
return 0;
}
static void __mic_dma_unmap_sg(struct device *dev,
struct scatterlist *sg, int nents,
enum dma_data_direction dir,
unsigned long attrs)
{
struct scif_hw_dev *scdev = dev_get_drvdata(dev);
struct mic_device *mdev = scdev_to_mdev(scdev);
struct scatterlist *s;
dma_addr_t da;
int i;
for_each_sg(sg, s, nents, i) {
da = mic_to_dma_addr(mdev, sg_dma_address(s));
mic_unmap(mdev, sg_dma_address(s), s->length);
sg_dma_address(s) = da;
}
dma_unmap_sg(&mdev->pdev->dev, sg, nents, dir);
}
static const struct dma_map_ops __mic_dma_ops = {
.alloc = __mic_dma_alloc,
.free = __mic_dma_free,
.map_page = __mic_dma_map_page,
.unmap_page = __mic_dma_unmap_page,
.map_sg = __mic_dma_map_sg,
.unmap_sg = __mic_dma_unmap_sg,
};
static struct mic_irq *
___mic_request_irq(struct scif_hw_dev *scdev,
irqreturn_t (*func)(int irq, void *data),
const char *name,
void *data, int db)
{
struct mic_device *mdev = scdev_to_mdev(scdev);
return mic_request_threaded_irq(mdev, func, NULL, name, data,
db, MIC_INTR_DB);
}
static void
___mic_free_irq(struct scif_hw_dev *scdev,
struct mic_irq *cookie, void *data)
{
struct mic_device *mdev = scdev_to_mdev(scdev);
mic_free_irq(mdev, cookie, data);
}
static void ___mic_ack_interrupt(struct scif_hw_dev *scdev, int num)
{
struct mic_device *mdev = scdev_to_mdev(scdev);
mdev->ops->intr_workarounds(mdev);
}
static int ___mic_next_db(struct scif_hw_dev *scdev)
{
struct mic_device *mdev = scdev_to_mdev(scdev);
return mic_next_db(mdev);
}
static void ___mic_send_intr(struct scif_hw_dev *scdev, int db)
{
struct mic_device *mdev = scdev_to_mdev(scdev);
mdev->ops->send_intr(mdev, db);
}
static void __iomem *___mic_ioremap(struct scif_hw_dev *scdev,
phys_addr_t pa, size_t len)
{
struct mic_device *mdev = scdev_to_mdev(scdev);
return mdev->aper.va + pa;
}
static void ___mic_iounmap(struct scif_hw_dev *scdev, void __iomem *va)
{
/* nothing to do */
}
static struct scif_hw_ops scif_hw_ops = {
.request_irq = ___mic_request_irq,
.free_irq = ___mic_free_irq,
.ack_interrupt = ___mic_ack_interrupt,
.next_db = ___mic_next_db,
.send_intr = ___mic_send_intr,
.remap = ___mic_ioremap,
.unmap = ___mic_iounmap,
};
static inline struct mic_device *mbdev_to_mdev(struct mbus_device *mbdev)
{
return dev_get_drvdata(mbdev->dev.parent);
}
static dma_addr_t
mic_dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, enum dma_data_direction dir,
unsigned long attrs)
{
void *va = phys_to_virt(page_to_phys(page)) + offset;
struct mic_device *mdev = dev_get_drvdata(dev->parent);
return mic_map_single(mdev, va, size);
}
static void
mic_dma_unmap_page(struct device *dev, dma_addr_t dma_addr,
size_t size, enum dma_data_direction dir,
unsigned long attrs)
{
struct mic_device *mdev = dev_get_drvdata(dev->parent);
mic_unmap_single(mdev, dma_addr, size);
}
static const struct dma_map_ops mic_dma_ops = {
.map_page = mic_dma_map_page,
.unmap_page = mic_dma_unmap_page,
};
static struct mic_irq *
_mic_request_threaded_irq(struct mbus_device *mbdev,
irq_handler_t handler, irq_handler_t thread_fn,
const char *name, void *data, int intr_src)
{
return mic_request_threaded_irq(mbdev_to_mdev(mbdev), handler,
thread_fn, name, data,
intr_src, MIC_INTR_DMA);
}
static void _mic_free_irq(struct mbus_device *mbdev,
struct mic_irq *cookie, void *data)
{
mic_free_irq(mbdev_to_mdev(mbdev), cookie, data);
}
static void _mic_ack_interrupt(struct mbus_device *mbdev, int num)
{
struct mic_device *mdev = mbdev_to_mdev(mbdev);
mdev->ops->intr_workarounds(mdev);
}
static struct mbus_hw_ops mbus_hw_ops = {
.request_threaded_irq = _mic_request_threaded_irq,
.free_irq = _mic_free_irq,
.ack_interrupt = _mic_ack_interrupt,
};
/* Initialize the MIC bootparams */
void mic_bootparam_init(struct mic_device *mdev)
{
struct mic_bootparam *bootparam = mdev->dp;
bootparam->magic = cpu_to_le32(MIC_MAGIC);
bootparam->h2c_config_db = -1;
bootparam->node_id = mdev->id + 1;
bootparam->scif_host_dma_addr = 0x0;
bootparam->scif_card_dma_addr = 0x0;
bootparam->c2h_scif_db = -1;
bootparam->h2c_scif_db = -1;
}
static inline struct mic_device *cosmdev_to_mdev(struct cosm_device *cdev)
{
return dev_get_drvdata(cdev->dev.parent);
}
static void _mic_reset(struct cosm_device *cdev)
{
struct mic_device *mdev = cosmdev_to_mdev(cdev);
mdev->ops->reset_fw_ready(mdev);
mdev->ops->reset(mdev);
}
static bool _mic_ready(struct cosm_device *cdev)
{
struct mic_device *mdev = cosmdev_to_mdev(cdev);
return mdev->ops->is_fw_ready(mdev);
}
/**
* mic_request_dma_chans - Request DMA channels
* @mdev: pointer to mic_device instance
*
* returns number of DMA channels acquired
*/
static int mic_request_dma_chans(struct mic_device *mdev)
{
dma_cap_mask_t mask;
struct dma_chan *chan;
dma_cap_zero(mask);
dma_cap_set(DMA_MEMCPY, mask);
do {
chan = dma_request_channel(mask, mdev->ops->dma_filter,
&mdev->pdev->dev);
if (chan) {
mdev->dma_ch[mdev->num_dma_ch++] = chan;
if (mdev->num_dma_ch >= MIC_MAX_DMA_CHAN)
break;
}
} while (chan);
dev_info(&mdev->pdev->dev, "DMA channels # %d\n", mdev->num_dma_ch);
return mdev->num_dma_ch;
}
/**
* mic_free_dma_chans - release DMA channels
* @mdev: pointer to mic_device instance
*
* returns none
*/
static void mic_free_dma_chans(struct mic_device *mdev)
{
int i = 0;
for (i = 0; i < mdev->num_dma_ch; i++) {
dma_release_channel(mdev->dma_ch[i]);
mdev->dma_ch[i] = NULL;
}
mdev->num_dma_ch = 0;
}
/**
* _mic_start - Start the MIC.
* @cdev: pointer to cosm_device instance
* @id: MIC device id/index provided by COSM used in other drivers like SCIF
*
* This function prepares an MIC for boot and initiates boot.
* RETURNS: An appropriate -ERRNO error value on error, or zero for success.
*
* For all cosm_hw_ops the caller holds a mutex to ensure serialization.
*/
static int _mic_start(struct cosm_device *cdev, int id)
{
struct mic_device *mdev = cosmdev_to_mdev(cdev);
int rc;
mic_bootparam_init(mdev);
mdev->dma_mbdev = mbus_register_device(&mdev->pdev->dev,
MBUS_DEV_DMA_HOST, &mic_dma_ops,
&mbus_hw_ops, id, mdev->mmio.va);
if (IS_ERR(mdev->dma_mbdev)) {
rc = PTR_ERR(mdev->dma_mbdev);
goto unlock_ret;
}
if (!mic_request_dma_chans(mdev)) {
rc = -ENODEV;
goto dma_remove;
}
mdev->scdev = scif_register_device(&mdev->pdev->dev, MIC_SCIF_DEV,
&__mic_dma_ops, &scif_hw_ops,
id + 1, 0, &mdev->mmio,
&mdev->aper, mdev->dp, NULL,
mdev->dma_ch, mdev->num_dma_ch,
true);
if (IS_ERR(mdev->scdev)) {
rc = PTR_ERR(mdev->scdev);
goto dma_free;
}
mdev->vpdev = vop_register_device(&mdev->pdev->dev,
VOP_DEV_TRNSP, &_mic_dma_ops,
&vop_hw_ops, id + 1, &mdev->aper,
mdev->dma_ch[0]);
if (IS_ERR(mdev->vpdev)) {
rc = PTR_ERR(mdev->vpdev);
goto scif_remove;
}
rc = mdev->ops->load_mic_fw(mdev, NULL);
if (rc)
goto vop_remove;
mic_smpt_restore(mdev);
mic_intr_restore(mdev);
mdev->intr_ops->enable_interrupts(mdev);
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);
mdev->ops->send_firmware_intr(mdev);
goto unlock_ret;
vop_remove:
vop_unregister_device(mdev->vpdev);
scif_remove:
scif_unregister_device(mdev->scdev);
dma_free:
mic_free_dma_chans(mdev);
dma_remove:
mbus_unregister_device(mdev->dma_mbdev);
unlock_ret:
return rc;
}
/**
* _mic_stop - Prepare the MIC for reset and trigger reset.
* @cdev: pointer to cosm_device instance
* @force: force a MIC to reset even if it is already offline.
*
* RETURNS: None.
*/
static void _mic_stop(struct cosm_device *cdev, bool force)
{
struct mic_device *mdev = cosmdev_to_mdev(cdev);
/*
* Since SCIF handles card shutdown and reset (using COSM), it will
* will be the first to be registered and the last to be
* unregistered.
*/
vop_unregister_device(mdev->vpdev);
scif_unregister_device(mdev->scdev);
mic_free_dma_chans(mdev);
mbus_unregister_device(mdev->dma_mbdev);
mic_bootparam_init(mdev);
}
static ssize_t _mic_family(struct cosm_device *cdev, char *buf)
{
struct mic_device *mdev = cosmdev_to_mdev(cdev);
static const char *family[MIC_FAMILY_LAST] = { "x100", "Unknown" };
return scnprintf(buf, PAGE_SIZE, "%s\n", family[mdev->family]);
}
static ssize_t _mic_stepping(struct cosm_device *cdev, char *buf)
{
struct mic_device *mdev = cosmdev_to_mdev(cdev);
const char *string = "??";
switch (mdev->stepping) {
case MIC_A0_STEP:
string = "A0";
break;
case MIC_B0_STEP:
string = "B0";
break;
case MIC_B1_STEP:
string = "B1";
break;
case MIC_C0_STEP:
string = "C0";
break;
default:
break;
}
return scnprintf(buf, PAGE_SIZE, "%s\n", string);
}
static struct mic_mw *_mic_aper(struct cosm_device *cdev)
{
struct mic_device *mdev = cosmdev_to_mdev(cdev);
return &mdev->aper;
}
struct cosm_hw_ops cosm_hw_ops = {
.reset = _mic_reset,
.force_reset = _mic_reset,
.post_reset = NULL,
.ready = _mic_ready,
.start = _mic_start,
.stop = _mic_stop,
.family = _mic_family,
.stepping = _mic_stepping,
.aper = _mic_aper,
};
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