misc: mic: remove the MIC drivers

This patch removes the MIC drivers from the kernel tree
since the corresponding devices have been discontinued.

Removing the dma and char-misc changes in one patch and
merging via the char-misc tree is best to avoid any
potential build breakage.

Cc: Nikhil Rao <nikhil.rao@intel.com>
Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Sudeep Dutt <sudeep.dutt@intel.com>
Acked-By: Vinod Koul <vkoul@kernel.org>
Reviewed-by: Sherry Sun <sherry.sun@nxp.com>
Link: https://lore.kernel.org/r/8c1443136563de34699d2c084df478181c205db4.1603854416.git.sudeep.dutt@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 0 insertions, 588 deletions

diff --git a/drivers/misc/mic/host/mic_boot.c b/drivers/misc/mic/host/mic_boot.c
deleted file mode 100644
index 8cb85b8b3e19..000000000000
--- a/drivers/misc/mic/host/mic_boot.c
+++ /dev/null
@@ -1,588 +0,0 @@
-// 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/dma-map-ops.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 = kzalloc(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 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,
-};