scif_map.h
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/*
* Intel MIC Platform Software Stack (MPSS)
*
* Copyright(c) 2014 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.
*
* Intel SCIF driver.
*
*/
#ifndef SCIF_MAP_H
#define SCIF_MAP_H
#include "../bus/scif_bus.h"
static __always_inline void *
scif_alloc_coherent(dma_addr_t *dma_handle,
struct scif_dev *scifdev, size_t size,
gfp_t gfp)
{
void *va;
if (scifdev_self(scifdev)) {
va = kmalloc(size, gfp);
if (va)
*dma_handle = virt_to_phys(va);
} else {
va = dma_alloc_coherent(&scifdev->sdev->dev,
size, dma_handle, gfp);
if (va && scifdev_is_p2p(scifdev))
*dma_handle = *dma_handle + scifdev->base_addr;
}
return va;
}
static __always_inline void
scif_free_coherent(void *va, dma_addr_t local,
struct scif_dev *scifdev, size_t size)
{
if (scifdev_self(scifdev)) {
kfree(va);
} else {
if (scifdev_is_p2p(scifdev) && local > scifdev->base_addr)
local = local - scifdev->base_addr;
dma_free_coherent(&scifdev->sdev->dev,
size, va, local);
}
}
static __always_inline int
scif_map_single(dma_addr_t *dma_handle,
void *local, struct scif_dev *scifdev, size_t size)
{
int err = 0;
if (scifdev_self(scifdev)) {
*dma_handle = virt_to_phys((local));
} else {
*dma_handle = dma_map_single(&scifdev->sdev->dev,
local, size, DMA_BIDIRECTIONAL);
if (dma_mapping_error(&scifdev->sdev->dev, *dma_handle))
err = -ENOMEM;
else if (scifdev_is_p2p(scifdev))
*dma_handle = *dma_handle + scifdev->base_addr;
}
if (err)
*dma_handle = 0;
return err;
}
static __always_inline void
scif_unmap_single(dma_addr_t local, struct scif_dev *scifdev,
size_t size)
{
if (!scifdev_self(scifdev)) {
if (scifdev_is_p2p(scifdev))
local = local - scifdev->base_addr;
dma_unmap_single(&scifdev->sdev->dev, local,
size, DMA_BIDIRECTIONAL);
}
}
static __always_inline void *
scif_ioremap(dma_addr_t phys, size_t size, struct scif_dev *scifdev)
{
void *out_virt;
struct scif_hw_dev *sdev = scifdev->sdev;
if (scifdev_self(scifdev))
out_virt = phys_to_virt(phys);
else
out_virt = (void __force *)
sdev->hw_ops->ioremap(sdev, phys, size);
return out_virt;
}
static __always_inline void
scif_iounmap(void *virt, size_t len, struct scif_dev *scifdev)
{
if (!scifdev_self(scifdev)) {
struct scif_hw_dev *sdev = scifdev->sdev;
sdev->hw_ops->iounmap(sdev, (void __force __iomem *)virt);
}
}
static __always_inline int
scif_map_page(dma_addr_t *dma_handle, struct page *page,
struct scif_dev *scifdev)
{
int err = 0;
if (scifdev_self(scifdev)) {
*dma_handle = page_to_phys(page);
} else {
struct scif_hw_dev *sdev = scifdev->sdev;
*dma_handle = dma_map_page(&sdev->dev,
page, 0x0, PAGE_SIZE,
DMA_BIDIRECTIONAL);
if (dma_mapping_error(&sdev->dev, *dma_handle))
err = -ENOMEM;
else if (scifdev_is_p2p(scifdev))
*dma_handle = *dma_handle + scifdev->base_addr;
}
if (err)
*dma_handle = 0;
return err;
}
#endif /* SCIF_MAP_H */