1 files changed, 254 insertions, 10 deletions

diff --git a/drivers/misc/mic/host/mic_boot.c b/drivers/misc/mic/host/mic_boot.c
index d9fa609da061..e5f6a5e7bca1 100644
--- a/drivers/misc/mic/host/mic_boot.c
+++ b/drivers/misc/mic/host/mic_boot.c
@@ -21,6 +21,7 @@
 #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>
@@ -29,6 +30,188 @@
 #include "mic_smpt.h"
 #include "mic_virtio.h"
 
+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,
+			     struct dma_attrs *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, struct dma_attrs *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,
+		   struct dma_attrs *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,
+		     struct dma_attrs *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,
+			    struct dma_attrs *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->sdev->parent, 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->sdev->parent, sg, nents, dir);
+	return 0;
+}
+
+static void __mic_dma_unmap_sg(struct device *dev,
+			       struct scatterlist *sg, int nents,
+			       enum dma_data_direction dir,
+			       struct dma_attrs *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->sdev->parent, 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);
+
+	return 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);
@@ -127,6 +310,58 @@ void mic_bootparam_init(struct mic_device *mdev)
 	bootparam->h2c_config_db = -1;
 	bootparam->shutdown_status = 0;
 	bootparam->shutdown_card = 0;
+	/* Total nodes = number of MICs + 1 for self node */
+	bootparam->tot_nodes = atomic_read(&g_num_mics) + 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;
+}
+
+/**
+ * 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;
+
+	request_module("mic_x100_dma");
+	dma_cap_zero(mask);
+	dma_cap_set(DMA_MEMCPY, mask);
+
+	do {
+		chan = dma_request_channel(mask, mdev->ops->dma_filter,
+					   mdev->sdev->parent);
+		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->sdev->parent, "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;
 }
 
 /**
@@ -141,6 +376,7 @@ int mic_start(struct mic_device *mdev, const char *buf)
 {
 	int rc;
 	mutex_lock(&mdev->mic_mutex);
+	mic_bootparam_init(mdev);
 retry:
 	if (MIC_OFFLINE != mdev->state) {
 		rc = -EINVAL;
@@ -161,14 +397,22 @@ retry:
 		rc = PTR_ERR(mdev->dma_mbdev);
 		goto unlock_ret;
 	}
-	mdev->dma_ch = mic_request_dma_chan(mdev);
-	if (!mdev->dma_ch) {
-		rc = -ENXIO;
+	if (!mic_request_dma_chans(mdev)) {
+		rc = -ENODEV;
 		goto dma_remove;
 	}
+	mdev->scdev = scif_register_device(mdev->sdev->parent, MIC_SCIF_DEV,
+					   &__mic_dma_ops, &scif_hw_ops,
+					   mdev->id + 1, 0, &mdev->mmio,
+					   &mdev->aper, mdev->dp, NULL,
+					   mdev->dma_ch, mdev->num_dma_ch);
+	if (IS_ERR(mdev->scdev)) {
+		rc = PTR_ERR(mdev->scdev);
+		goto dma_free;
+	}
 	rc = mdev->ops->load_mic_fw(mdev, buf);
 	if (rc)
-		goto dma_release;
+		goto scif_remove;
 	mic_smpt_restore(mdev);
 	mic_intr_restore(mdev);
 	mdev->intr_ops->enable_interrupts(mdev);
@@ -177,8 +421,10 @@ retry:
 	mdev->ops->send_firmware_intr(mdev);
 	mic_set_state(mdev, MIC_ONLINE);
 	goto unlock_ret;
-dma_release:
-	dma_release_channel(mdev->dma_ch);
+scif_remove:
+	scif_unregister_device(mdev->scdev);
+dma_free:
+	mic_free_dma_chans(mdev);
 dma_remove:
 	mbus_unregister_device(mdev->dma_mbdev);
 unlock_ret:
@@ -197,11 +443,9 @@ void mic_stop(struct mic_device *mdev, bool force)
 {
 	mutex_lock(&mdev->mic_mutex);
 	if (MIC_OFFLINE != mdev->state || force) {
+		scif_unregister_device(mdev->scdev);
 		mic_virtio_reset_devices(mdev);
-		if (mdev->dma_ch) {
-			dma_release_channel(mdev->dma_ch);
-			mdev->dma_ch = NULL;
-		}
+		mic_free_dma_chans(mdev);
 		mbus_unregister_device(mdev->dma_mbdev);
 		mic_bootparam_init(mdev);
 		mic_reset(mdev);