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linux/drivers/misc/mic/host/mic_boot.c
Krzysztof Kozlowski 00085f1efa dma-mapping: use unsigned long for dma_attrs 
The dma-mapping core and the implementations do not change the DMA
attributes passed by pointer.  Thus the pointer can point to const data.
However the attributes do not have to be a bitfield.  Instead unsigned
long will do fine:

1. This is just simpler.  Both in terms of reading the code and setting
   attributes.  Instead of initializing local attributes on the stack
   and passing pointer to it to dma_set_attr(), just set the bits.

2. It brings safeness and checking for const correctness because the
   attributes are passed by value.

Semantic patches for this change (at least most of them):

    virtual patch
    virtual context

    @r@
    identifier f, attrs;

    @@
    f(...,
    - struct dma_attrs *attrs
    + unsigned long attrs
    , ...)
    {
    ...
    }

    @@
    identifier r.f;
    @@
    f(...,
    - NULL
    + 0
     )

and

    // Options: --all-includes
    virtual patch
    virtual context

    @r@
    identifier f, attrs;
    type t;

    @@
    t f(..., struct dma_attrs *attrs);

    @@
    identifier r.f;
    @@
    f(...,
    - NULL
    + 0
     )

Link: http://lkml.kernel.org/r/1468399300-5399-2-git-send-email-k.kozlowski@samsung.com
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no>
Acked-by: Mark Salter <msalter@redhat.com> [c6x]
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com> [cris]
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> [drm]
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Acked-by: Joerg Roedel <jroedel@suse.de> [iommu]
Acked-by: Fabien Dessenne <fabien.dessenne@st.com> [bdisp]
Reviewed-by: Marek Szyprowski <m.szyprowski@samsung.com> [vb2-core]
Acked-by: David Vrabel <david.vrabel@citrix.com> [xen]
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> [xen swiotlb]
Acked-by: Joerg Roedel <jroedel@suse.de> [iommu]
Acked-by: Richard Kuo <rkuo@codeaurora.org> [hexagon]
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> [m68k]
Acked-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> [s390]
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Acked-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no> [avr32]
Acked-by: Vineet Gupta <vgupta@synopsys.com> [arc]
Acked-by: Robin Murphy <robin.murphy@arm.com> [arm64 and dma-iommu]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-04 08:50:07 -04:00

600 lines
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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/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,
.ioremap = __mic_ioremap,
.iounmap = __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);
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 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,
.ioremap = ___mic_ioremap,
.iounmap = ___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 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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