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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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 655 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
128 lines
2.9 KiB
C
128 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Intel MIC Platform Software Stack (MPSS)
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*
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* Copyright(c) 2014 Intel Corporation.
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*
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* Intel SCIF driver.
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*/
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#ifndef SCIF_MAP_H
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#define SCIF_MAP_H
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#include "../bus/scif_bus.h"
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static __always_inline void *
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scif_alloc_coherent(dma_addr_t *dma_handle,
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struct scif_dev *scifdev, size_t size,
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gfp_t gfp)
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{
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void *va;
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if (scifdev_self(scifdev)) {
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va = kmalloc(size, gfp);
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if (va)
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*dma_handle = virt_to_phys(va);
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} else {
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va = dma_alloc_coherent(&scifdev->sdev->dev,
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size, dma_handle, gfp);
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if (va && scifdev_is_p2p(scifdev))
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*dma_handle = *dma_handle + scifdev->base_addr;
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}
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return va;
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}
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static __always_inline void
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scif_free_coherent(void *va, dma_addr_t local,
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struct scif_dev *scifdev, size_t size)
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{
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if (scifdev_self(scifdev)) {
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kfree(va);
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} else {
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if (scifdev_is_p2p(scifdev) && local > scifdev->base_addr)
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local = local - scifdev->base_addr;
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dma_free_coherent(&scifdev->sdev->dev,
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size, va, local);
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}
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}
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static __always_inline int
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scif_map_single(dma_addr_t *dma_handle,
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void *local, struct scif_dev *scifdev, size_t size)
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{
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int err = 0;
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if (scifdev_self(scifdev)) {
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*dma_handle = virt_to_phys((local));
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} else {
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*dma_handle = dma_map_single(&scifdev->sdev->dev,
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local, size, DMA_BIDIRECTIONAL);
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if (dma_mapping_error(&scifdev->sdev->dev, *dma_handle))
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err = -ENOMEM;
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else if (scifdev_is_p2p(scifdev))
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*dma_handle = *dma_handle + scifdev->base_addr;
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}
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if (err)
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*dma_handle = 0;
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return err;
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}
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static __always_inline void
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scif_unmap_single(dma_addr_t local, struct scif_dev *scifdev,
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size_t size)
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{
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if (!scifdev_self(scifdev)) {
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if (scifdev_is_p2p(scifdev))
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local = local - scifdev->base_addr;
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dma_unmap_single(&scifdev->sdev->dev, local,
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size, DMA_BIDIRECTIONAL);
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}
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}
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static __always_inline void *
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scif_ioremap(dma_addr_t phys, size_t size, struct scif_dev *scifdev)
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{
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void *out_virt;
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struct scif_hw_dev *sdev = scifdev->sdev;
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if (scifdev_self(scifdev))
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out_virt = phys_to_virt(phys);
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else
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out_virt = (void __force *)
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sdev->hw_ops->remap(sdev, phys, size);
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return out_virt;
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}
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static __always_inline void
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scif_iounmap(void *virt, size_t len, struct scif_dev *scifdev)
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{
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if (!scifdev_self(scifdev)) {
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struct scif_hw_dev *sdev = scifdev->sdev;
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sdev->hw_ops->unmap(sdev, (void __force __iomem *)virt);
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}
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}
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static __always_inline int
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scif_map_page(dma_addr_t *dma_handle, struct page *page,
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struct scif_dev *scifdev)
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{
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int err = 0;
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if (scifdev_self(scifdev)) {
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*dma_handle = page_to_phys(page);
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} else {
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struct scif_hw_dev *sdev = scifdev->sdev;
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*dma_handle = dma_map_page(&sdev->dev,
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page, 0x0, PAGE_SIZE,
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DMA_BIDIRECTIONAL);
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if (dma_mapping_error(&sdev->dev, *dma_handle))
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err = -ENOMEM;
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else if (scifdev_is_p2p(scifdev))
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*dma_handle = *dma_handle + scifdev->base_addr;
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}
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if (err)
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*dma_handle = 0;
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return err;
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}
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#endif /* SCIF_MAP_H */
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