600 lines
15 KiB
C
600 lines
15 KiB
C
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/*
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* Intel MIC Platform Software Stack (MPSS)
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*
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* Copyright(c) 2013 Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* The full GNU General Public License is included in this distribution in
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* the file called "COPYING".
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*
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* Intel MIC Host driver.
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*
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*/
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#include <linux/delay.h>
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#include <linux/firmware.h>
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#include <linux/pci.h>
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#include <linux/kmod.h>
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#include <linux/mic_common.h>
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#include <linux/mic_bus.h>
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#include "../bus/scif_bus.h"
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#include "../bus/vop_bus.h"
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#include "../common/mic_dev.h"
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#include "mic_device.h"
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#include "mic_smpt.h"
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static inline struct mic_device *vpdev_to_mdev(struct device *dev)
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{
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return dev_get_drvdata(dev->parent);
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}
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static dma_addr_t
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_mic_dma_map_page(struct device *dev, struct page *page,
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unsigned long offset, size_t size,
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enum dma_data_direction dir, unsigned long attrs)
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{
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void *va = phys_to_virt(page_to_phys(page)) + offset;
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struct mic_device *mdev = vpdev_to_mdev(dev);
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return mic_map_single(mdev, va, size);
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}
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static void _mic_dma_unmap_page(struct device *dev, dma_addr_t dma_addr,
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size_t size, enum dma_data_direction dir,
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unsigned long attrs)
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{
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struct mic_device *mdev = vpdev_to_mdev(dev);
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mic_unmap_single(mdev, dma_addr, size);
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}
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static const struct dma_map_ops _mic_dma_ops = {
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.map_page = _mic_dma_map_page,
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.unmap_page = _mic_dma_unmap_page,
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};
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static struct mic_irq *
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__mic_request_irq(struct vop_device *vpdev,
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irqreturn_t (*func)(int irq, void *data),
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const char *name, void *data, int intr_src)
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{
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struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev);
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return mic_request_threaded_irq(mdev, func, NULL, name, data,
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intr_src, MIC_INTR_DB);
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}
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static void __mic_free_irq(struct vop_device *vpdev,
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struct mic_irq *cookie, void *data)
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{
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struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev);
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mic_free_irq(mdev, cookie, data);
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}
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static void __mic_ack_interrupt(struct vop_device *vpdev, int num)
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{
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struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev);
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mdev->ops->intr_workarounds(mdev);
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}
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static int __mic_next_db(struct vop_device *vpdev)
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{
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struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev);
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return mic_next_db(mdev);
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}
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static void *__mic_get_dp(struct vop_device *vpdev)
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{
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struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev);
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return mdev->dp;
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}
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static void __iomem *__mic_get_remote_dp(struct vop_device *vpdev)
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{
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return NULL;
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}
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static void __mic_send_intr(struct vop_device *vpdev, int db)
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{
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struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev);
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mdev->ops->send_intr(mdev, db);
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}
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static void __iomem *__mic_ioremap(struct vop_device *vpdev,
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dma_addr_t pa, size_t len)
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{
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struct mic_device *mdev = vpdev_to_mdev(&vpdev->dev);
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return mdev->aper.va + pa;
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}
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static void __mic_iounmap(struct vop_device *vpdev, void __iomem *va)
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{
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/* nothing to do */
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}
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static struct vop_hw_ops vop_hw_ops = {
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.request_irq = __mic_request_irq,
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.free_irq = __mic_free_irq,
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.ack_interrupt = __mic_ack_interrupt,
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.next_db = __mic_next_db,
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.get_dp = __mic_get_dp,
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.get_remote_dp = __mic_get_remote_dp,
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.send_intr = __mic_send_intr,
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.ioremap = __mic_ioremap,
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.iounmap = __mic_iounmap,
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};
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static inline struct mic_device *scdev_to_mdev(struct scif_hw_dev *scdev)
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{
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return dev_get_drvdata(scdev->dev.parent);
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}
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static void *__mic_dma_alloc(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t gfp,
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unsigned long attrs)
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{
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struct scif_hw_dev *scdev = dev_get_drvdata(dev);
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struct mic_device *mdev = scdev_to_mdev(scdev);
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dma_addr_t tmp;
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void *va = kmalloc(size, gfp);
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if (va) {
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tmp = mic_map_single(mdev, va, size);
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if (dma_mapping_error(dev, tmp)) {
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kfree(va);
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va = NULL;
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} else {
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*dma_handle = tmp;
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}
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}
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return va;
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}
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static void __mic_dma_free(struct device *dev, size_t size, void *vaddr,
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dma_addr_t dma_handle, unsigned long attrs)
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{
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struct scif_hw_dev *scdev = dev_get_drvdata(dev);
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struct mic_device *mdev = scdev_to_mdev(scdev);
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mic_unmap_single(mdev, dma_handle, size);
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kfree(vaddr);
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}
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static dma_addr_t
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__mic_dma_map_page(struct device *dev, struct page *page, unsigned long offset,
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size_t size, enum dma_data_direction dir,
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unsigned long attrs)
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{
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void *va = phys_to_virt(page_to_phys(page)) + offset;
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struct scif_hw_dev *scdev = dev_get_drvdata(dev);
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struct mic_device *mdev = scdev_to_mdev(scdev);
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return mic_map_single(mdev, va, size);
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}
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static void
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__mic_dma_unmap_page(struct device *dev, dma_addr_t dma_addr,
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size_t size, enum dma_data_direction dir,
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unsigned long attrs)
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{
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struct scif_hw_dev *scdev = dev_get_drvdata(dev);
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struct mic_device *mdev = scdev_to_mdev(scdev);
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mic_unmap_single(mdev, dma_addr, size);
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}
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static int __mic_dma_map_sg(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction dir,
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unsigned long attrs)
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{
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struct scif_hw_dev *scdev = dev_get_drvdata(dev);
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struct mic_device *mdev = scdev_to_mdev(scdev);
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struct scatterlist *s;
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int i, j, ret;
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dma_addr_t da;
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ret = dma_map_sg(&mdev->pdev->dev, sg, nents, dir);
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if (ret <= 0)
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return 0;
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for_each_sg(sg, s, nents, i) {
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da = mic_map(mdev, sg_dma_address(s) + s->offset, s->length);
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if (!da)
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goto err;
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sg_dma_address(s) = da;
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}
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return nents;
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err:
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for_each_sg(sg, s, i, j) {
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mic_unmap(mdev, sg_dma_address(s), s->length);
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sg_dma_address(s) = mic_to_dma_addr(mdev, sg_dma_address(s));
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}
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dma_unmap_sg(&mdev->pdev->dev, sg, nents, dir);
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return 0;
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}
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static void __mic_dma_unmap_sg(struct device *dev,
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struct scatterlist *sg, int nents,
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enum dma_data_direction dir,
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unsigned long attrs)
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{
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struct scif_hw_dev *scdev = dev_get_drvdata(dev);
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struct mic_device *mdev = scdev_to_mdev(scdev);
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struct scatterlist *s;
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dma_addr_t da;
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int i;
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for_each_sg(sg, s, nents, i) {
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da = mic_to_dma_addr(mdev, sg_dma_address(s));
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mic_unmap(mdev, sg_dma_address(s), s->length);
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sg_dma_address(s) = da;
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}
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dma_unmap_sg(&mdev->pdev->dev, sg, nents, dir);
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}
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static struct dma_map_ops __mic_dma_ops = {
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.alloc = __mic_dma_alloc,
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.free = __mic_dma_free,
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.map_page = __mic_dma_map_page,
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.unmap_page = __mic_dma_unmap_page,
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.map_sg = __mic_dma_map_sg,
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.unmap_sg = __mic_dma_unmap_sg,
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};
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static struct mic_irq *
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___mic_request_irq(struct scif_hw_dev *scdev,
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irqreturn_t (*func)(int irq, void *data),
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const char *name,
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void *data, int db)
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{
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struct mic_device *mdev = scdev_to_mdev(scdev);
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return mic_request_threaded_irq(mdev, func, NULL, name, data,
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db, MIC_INTR_DB);
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}
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static void
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___mic_free_irq(struct scif_hw_dev *scdev,
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struct mic_irq *cookie, void *data)
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{
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struct mic_device *mdev = scdev_to_mdev(scdev);
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mic_free_irq(mdev, cookie, data);
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}
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static void ___mic_ack_interrupt(struct scif_hw_dev *scdev, int num)
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{
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struct mic_device *mdev = scdev_to_mdev(scdev);
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mdev->ops->intr_workarounds(mdev);
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}
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static int ___mic_next_db(struct scif_hw_dev *scdev)
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{
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struct mic_device *mdev = scdev_to_mdev(scdev);
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return mic_next_db(mdev);
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}
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static void ___mic_send_intr(struct scif_hw_dev *scdev, int db)
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{
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struct mic_device *mdev = scdev_to_mdev(scdev);
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mdev->ops->send_intr(mdev, db);
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}
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static void __iomem *___mic_ioremap(struct scif_hw_dev *scdev,
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phys_addr_t pa, size_t len)
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{
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struct mic_device *mdev = scdev_to_mdev(scdev);
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return mdev->aper.va + pa;
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}
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static void ___mic_iounmap(struct scif_hw_dev *scdev, void __iomem *va)
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{
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/* nothing to do */
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}
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static struct scif_hw_ops scif_hw_ops = {
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.request_irq = ___mic_request_irq,
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.free_irq = ___mic_free_irq,
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.ack_interrupt = ___mic_ack_interrupt,
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.next_db = ___mic_next_db,
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.send_intr = ___mic_send_intr,
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.ioremap = ___mic_ioremap,
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.iounmap = ___mic_iounmap,
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};
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static inline struct mic_device *mbdev_to_mdev(struct mbus_device *mbdev)
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{
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return dev_get_drvdata(mbdev->dev.parent);
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}
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static dma_addr_t
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mic_dma_map_page(struct device *dev, struct page *page,
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unsigned long offset, size_t size, enum dma_data_direction dir,
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unsigned long attrs)
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{
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void *va = phys_to_virt(page_to_phys(page)) + offset;
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struct mic_device *mdev = dev_get_drvdata(dev->parent);
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return mic_map_single(mdev, va, size);
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}
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static void
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mic_dma_unmap_page(struct device *dev, dma_addr_t dma_addr,
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size_t size, enum dma_data_direction dir,
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unsigned long attrs)
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{
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struct mic_device *mdev = dev_get_drvdata(dev->parent);
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mic_unmap_single(mdev, dma_addr, size);
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}
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static struct dma_map_ops mic_dma_ops = {
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.map_page = mic_dma_map_page,
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.unmap_page = mic_dma_unmap_page,
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};
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static struct mic_irq *
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_mic_request_threaded_irq(struct mbus_device *mbdev,
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irq_handler_t handler, irq_handler_t thread_fn,
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const char *name, void *data, int intr_src)
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{
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return mic_request_threaded_irq(mbdev_to_mdev(mbdev), handler,
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thread_fn, name, data,
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intr_src, MIC_INTR_DMA);
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}
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static void _mic_free_irq(struct mbus_device *mbdev,
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|
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,
|
||
|
|
};
|