dmaengine: ioatdma: move all the init routines (c0f28ce6) · Commits · e / devices / android_kernel_fairphone_FP4

drivers/dma/ioat/Makefile

+1 −1

Original line number	Diff line number	Diff line
		obj-$(CONFIG_INTEL_IOATDMA) += ioatdma.o
		ioatdma-y := pci.o dma.o dma_v3.o dca.o sysfs.o
		ioatdma-y := init.o dma.o dma_v3.o dca.o sysfs.o

drivers/dma/ioat/dma.c

+5 −504

Original line number	Diff line number	Diff line
		@@ -37,30 +37,12 @@

		#include "../dmaengine.h"

		int ioat_pending_level = 4;
		module_param(ioat_pending_level, int, 0644);
		MODULE_PARM_DESC(ioat_pending_level,
		"high-water mark for pushing ioat descriptors (default: 4)");
		int ioat_ring_alloc_order = 8;
		module_param(ioat_ring_alloc_order, int, 0644);
		MODULE_PARM_DESC(ioat_ring_alloc_order,
		"ioat+: allocate 2^n descriptors per channel (default: 8 max: 16)");
		static int ioat_ring_max_alloc_order = IOAT_MAX_ORDER;
		module_param(ioat_ring_max_alloc_order, int, 0644);
		MODULE_PARM_DESC(ioat_ring_max_alloc_order,
		"ioat+: upper limit for ring size (default: 16)");
		static char ioat_interrupt_style[32] = "msix";
		module_param_string(ioat_interrupt_style, ioat_interrupt_style,
		sizeof(ioat_interrupt_style), 0644);
		MODULE_PARM_DESC(ioat_interrupt_style,
		"set ioat interrupt style: msix (default), msi, intx");

		/**
		* ioat_dma_do_interrupt - handler used for single vector interrupt mode
		* @irq: interrupt id
		* @data: interrupt data
		*/
		static irqreturn_t ioat_dma_do_interrupt(int irq, void *data)
		irqreturn_t ioat_dma_do_interrupt(int irq, void *data)
		{
		struct ioatdma_device *instance = data;
		struct ioatdma_chan *ioat_chan;
		@@ -94,7 +76,7 @@ static irqreturn_t ioat_dma_do_interrupt(int irq, void *data)
		* @irq: interrupt id
		* @data: interrupt data
		*/
		static irqreturn_t ioat_dma_do_interrupt_msix(int irq, void *data)
		irqreturn_t ioat_dma_do_interrupt_msix(int irq, void *data)
		{
		struct ioatdma_chan *ioat_chan = data;

		@@ -104,28 +86,6 @@ static irqreturn_t ioat_dma_do_interrupt_msix(int irq, void *data)
		return IRQ_HANDLED;
		}

		/* common channel initialization */
		void
		ioat_init_channel(struct ioatdma_device *ioat_dma,
		struct ioatdma_chan *ioat_chan, int idx)
		{
		struct dma_device *dma = &ioat_dma->dma_dev;
		struct dma_chan *c = &ioat_chan->dma_chan;
		unsigned long data = (unsigned long) c;

		ioat_chan->ioat_dma = ioat_dma;
		ioat_chan->reg_base = ioat_dma->reg_base + (0x80 * (idx + 1));
		spin_lock_init(&ioat_chan->cleanup_lock);
		ioat_chan->dma_chan.device = dma;
		dma_cookie_init(&ioat_chan->dma_chan);
		list_add_tail(&ioat_chan->dma_chan.device_node, &dma->channels);
		ioat_dma->idx[idx] = ioat_chan;
		init_timer(&ioat_chan->timer);
		ioat_chan->timer.function = ioat_dma->timer_fn;
		ioat_chan->timer.data = data;
		tasklet_init(&ioat_chan->cleanup_task, ioat_dma->cleanup_fn, data);
		}

		void ioat_stop(struct ioatdma_chan *ioat_chan)
		{
		struct ioatdma_device *ioat_dma = ioat_chan->ioat_dma;
		@@ -214,299 +174,6 @@ ioat_dma_tx_status(struct dma_chan *c, dma_cookie_t cookie,
		return dma_cookie_status(c, cookie, txstate);
		}

		/*
		* Perform a IOAT transaction to verify the HW works.
		*/
		#define IOAT_TEST_SIZE 2000

		static void ioat_dma_test_callback(void *dma_async_param)
		{
		struct completion *cmp = dma_async_param;

		complete(cmp);
		}

		/**
		* ioat_dma_self_test - Perform a IOAT transaction to verify the HW works.
		* @ioat_dma: dma device to be tested
		*/
		int ioat_dma_self_test(struct ioatdma_device *ioat_dma)
		{
		int i;
		u8 *src;
		u8 *dest;
		struct dma_device *dma = &ioat_dma->dma_dev;
		struct device *dev = &ioat_dma->pdev->dev;
		struct dma_chan *dma_chan;
		struct dma_async_tx_descriptor *tx;
		dma_addr_t dma_dest, dma_src;
		dma_cookie_t cookie;
		int err = 0;
		struct completion cmp;
		unsigned long tmo;
		unsigned long flags;

		src = kzalloc(sizeof(u8) * IOAT_TEST_SIZE, GFP_KERNEL);
		if (!src)
		return -ENOMEM;
		dest = kzalloc(sizeof(u8) * IOAT_TEST_SIZE, GFP_KERNEL);
		if (!dest) {
		kfree(src);
		return -ENOMEM;
		}

		/* Fill in src buffer */
		for (i = 0; i < IOAT_TEST_SIZE; i++)
		src[i] = (u8)i;

		/* Start copy, using first DMA channel */
		dma_chan = container_of(dma->channels.next, struct dma_chan,
		device_node);
		if (dma->device_alloc_chan_resources(dma_chan) < 1) {
		dev_err(dev, "selftest cannot allocate chan resource\n");
		err = -ENODEV;
		goto out;
		}

		dma_src = dma_map_single(dev, src, IOAT_TEST_SIZE, DMA_TO_DEVICE);
		if (dma_mapping_error(dev, dma_src)) {
		dev_err(dev, "mapping src buffer failed\n");
		goto free_resources;
		}
		dma_dest = dma_map_single(dev, dest, IOAT_TEST_SIZE, DMA_FROM_DEVICE);
		if (dma_mapping_error(dev, dma_dest)) {
		dev_err(dev, "mapping dest buffer failed\n");
		goto unmap_src;
		}
		flags = DMA_PREP_INTERRUPT;
		tx = ioat_dma->dma_dev.device_prep_dma_memcpy(dma_chan, dma_dest,
		dma_src, IOAT_TEST_SIZE,
		flags);
		if (!tx) {
		dev_err(dev, "Self-test prep failed, disabling\n");
		err = -ENODEV;
		goto unmap_dma;
		}

		async_tx_ack(tx);
		init_completion(&cmp);
		tx->callback = ioat_dma_test_callback;
		tx->callback_param = &cmp;
		cookie = tx->tx_submit(tx);
		if (cookie < 0) {
		dev_err(dev, "Self-test setup failed, disabling\n");
		err = -ENODEV;
		goto unmap_dma;
		}
		dma->device_issue_pending(dma_chan);

		tmo = wait_for_completion_timeout(&cmp, msecs_to_jiffies(3000));

		if (tmo == 0 \|\|
		dma->device_tx_status(dma_chan, cookie, NULL)
		!= DMA_COMPLETE) {
		dev_err(dev, "Self-test copy timed out, disabling\n");
		err = -ENODEV;
		goto unmap_dma;
		}
		if (memcmp(src, dest, IOAT_TEST_SIZE)) {
		dev_err(dev, "Self-test copy failed compare, disabling\n");
		err = -ENODEV;
		goto free_resources;
		}

		unmap_dma:
		dma_unmap_single(dev, dma_dest, IOAT_TEST_SIZE, DMA_FROM_DEVICE);
		unmap_src:
		dma_unmap_single(dev, dma_src, IOAT_TEST_SIZE, DMA_TO_DEVICE);
		free_resources:
		dma->device_free_chan_resources(dma_chan);
		out:
		kfree(src);
		kfree(dest);
		return err;
		}

		/**
		* ioat_dma_setup_interrupts - setup interrupt handler
		* @ioat_dma: ioat dma device
		*/
		int ioat_dma_setup_interrupts(struct ioatdma_device *ioat_dma)
		{
		struct ioatdma_chan *ioat_chan;
		struct pci_dev *pdev = ioat_dma->pdev;
		struct device *dev = &pdev->dev;
		struct msix_entry *msix;
		int i, j, msixcnt;
		int err = -EINVAL;
		u8 intrctrl = 0;

		if (!strcmp(ioat_interrupt_style, "msix"))
		goto msix;
		if (!strcmp(ioat_interrupt_style, "msi"))
		goto msi;
		if (!strcmp(ioat_interrupt_style, "intx"))
		goto intx;
		dev_err(dev, "invalid ioat_interrupt_style %s\n", ioat_interrupt_style);
		goto err_no_irq;

		msix:
		/* The number of MSI-X vectors should equal the number of channels */
		msixcnt = ioat_dma->dma_dev.chancnt;
		for (i = 0; i < msixcnt; i++)
		ioat_dma->msix_entries[i].entry = i;

		err = pci_enable_msix_exact(pdev, ioat_dma->msix_entries, msixcnt);
		if (err)
		goto msi;

		for (i = 0; i < msixcnt; i++) {
		msix = &ioat_dma->msix_entries[i];
		ioat_chan = ioat_chan_by_index(ioat_dma, i);
		err = devm_request_irq(dev, msix->vector,
		ioat_dma_do_interrupt_msix, 0,
		"ioat-msix", ioat_chan);
		if (err) {
		for (j = 0; j < i; j++) {
		msix = &ioat_dma->msix_entries[j];
		ioat_chan = ioat_chan_by_index(ioat_dma, j);
		devm_free_irq(dev, msix->vector, ioat_chan);
		}
		goto msi;
		}
		}
		intrctrl \|= IOAT_INTRCTRL_MSIX_VECTOR_CONTROL;
		ioat_dma->irq_mode = IOAT_MSIX;
		goto done;

		msi:
		err = pci_enable_msi(pdev);
		if (err)
		goto intx;

		err = devm_request_irq(dev, pdev->irq, ioat_dma_do_interrupt, 0,
		"ioat-msi", ioat_dma);
		if (err) {
		pci_disable_msi(pdev);
		goto intx;
		}
		ioat_dma->irq_mode = IOAT_MSI;
		goto done;

		intx:
		err = devm_request_irq(dev, pdev->irq, ioat_dma_do_interrupt,
		IRQF_SHARED, "ioat-intx", ioat_dma);
		if (err)
		goto err_no_irq;

		ioat_dma->irq_mode = IOAT_INTX;
		done:
		if (ioat_dma->intr_quirk)
		ioat_dma->intr_quirk(ioat_dma);
		intrctrl \|= IOAT_INTRCTRL_MASTER_INT_EN;
		writeb(intrctrl, ioat_dma->reg_base + IOAT_INTRCTRL_OFFSET);
		return 0;

		err_no_irq:
		/* Disable all interrupt generation */
		writeb(0, ioat_dma->reg_base + IOAT_INTRCTRL_OFFSET);
		ioat_dma->irq_mode = IOAT_NOIRQ;
		dev_err(dev, "no usable interrupts\n");
		return err;
		}
		EXPORT_SYMBOL(ioat_dma_setup_interrupts);

		static void ioat_disable_interrupts(struct ioatdma_device *ioat_dma)
		{
		/* Disable all interrupt generation */
		writeb(0, ioat_dma->reg_base + IOAT_INTRCTRL_OFFSET);
		}

		int ioat_probe(struct ioatdma_device *ioat_dma)
		{
		int err = -ENODEV;
		struct dma_device *dma = &ioat_dma->dma_dev;
		struct pci_dev *pdev = ioat_dma->pdev;
		struct device *dev = &pdev->dev;

		/* DMA coherent memory pool for DMA descriptor allocations */
		ioat_dma->dma_pool = pci_pool_create("dma_desc_pool", pdev,
		sizeof(struct ioat_dma_descriptor),
		64, 0);
		if (!ioat_dma->dma_pool) {
		err = -ENOMEM;
		goto err_dma_pool;
		}

		ioat_dma->completion_pool = pci_pool_create("completion_pool", pdev,
		sizeof(u64),
		SMP_CACHE_BYTES,
		SMP_CACHE_BYTES);

		if (!ioat_dma->completion_pool) {
		err = -ENOMEM;
		goto err_completion_pool;
		}

		ioat_dma->enumerate_channels(ioat_dma);

		dma_cap_set(DMA_MEMCPY, dma->cap_mask);
		dma->dev = &pdev->dev;

		if (!dma->chancnt) {
		dev_err(dev, "channel enumeration error\n");
		goto err_setup_interrupts;
		}

		err = ioat_dma_setup_interrupts(ioat_dma);
		if (err)
		goto err_setup_interrupts;

		err = ioat_dma->self_test(ioat_dma);
		if (err)
		goto err_self_test;

		return 0;

		err_self_test:
		ioat_disable_interrupts(ioat_dma);
		err_setup_interrupts:
		pci_pool_destroy(ioat_dma->completion_pool);
		err_completion_pool:
		pci_pool_destroy(ioat_dma->dma_pool);
		err_dma_pool:
		return err;
		}

		int ioat_register(struct ioatdma_device *ioat_dma)
		{
		int err = dma_async_device_register(&ioat_dma->dma_dev);

		if (err) {
		ioat_disable_interrupts(ioat_dma);
		pci_pool_destroy(ioat_dma->completion_pool);
		pci_pool_destroy(ioat_dma->dma_pool);
		}

		return err;
		}

		void ioat_dma_remove(struct ioatdma_device *ioat_dma)
		{
		struct dma_device *dma = &ioat_dma->dma_dev;

		ioat_disable_interrupts(ioat_dma);

		ioat_kobject_del(ioat_dma);

		dma_async_device_unregister(dma);

		pci_pool_destroy(ioat_dma->dma_pool);
		pci_pool_destroy(ioat_dma->completion_pool);

		INIT_LIST_HEAD(&dma->channels);
		}

		void __ioat_issue_pending(struct ioatdma_chan *ioat_chan)
		{
		ioat_chan->dmacount += ioat_ring_pending(ioat_chan);
		@@ -577,7 +244,7 @@ static void __ioat_start_null_desc(struct ioatdma_chan *ioat_chan)
		__ioat_issue_pending(ioat_chan);
		}

		static void ioat_start_null_desc(struct ioatdma_chan *ioat_chan)
		void ioat_start_null_desc(struct ioatdma_chan *ioat_chan)
		{
		spin_lock_bh(&ioat_chan->prep_lock);
		__ioat_start_null_desc(ioat_chan);
		@@ -645,49 +312,6 @@ int ioat_reset_sync(struct ioatdma_chan *ioat_chan, unsigned long tmo)
		return err;
		}

		/**
		* ioat_enumerate_channels - find and initialize the device's channels
		* @ioat_dma: the ioat dma device to be enumerated
		*/
		int ioat_enumerate_channels(struct ioatdma_device *ioat_dma)
		{
		struct ioatdma_chan *ioat_chan;
		struct device *dev = &ioat_dma->pdev->dev;
		struct dma_device *dma = &ioat_dma->dma_dev;
		u8 xfercap_log;
		int i;

		INIT_LIST_HEAD(&dma->channels);
		dma->chancnt = readb(ioat_dma->reg_base + IOAT_CHANCNT_OFFSET);
		dma->chancnt &= 0x1f; /* bits [4:0] valid */
		if (dma->chancnt > ARRAY_SIZE(ioat_dma->idx)) {
		dev_warn(dev, "(%d) exceeds max supported channels (%zu)\n",
		dma->chancnt, ARRAY_SIZE(ioat_dma->idx));
		dma->chancnt = ARRAY_SIZE(ioat_dma->idx);
		}
		xfercap_log = readb(ioat_dma->reg_base + IOAT_XFERCAP_OFFSET);
		xfercap_log &= 0x1f; /* bits [4:0] valid */
		if (xfercap_log == 0)
		return 0;
		dev_dbg(dev, "%s: xfercap = %d\n", __func__, 1 << xfercap_log);

		for (i = 0; i < dma->chancnt; i++) {
		ioat_chan = devm_kzalloc(dev, sizeof(*ioat_chan), GFP_KERNEL);
		if (!ioat_chan)
		break;

		ioat_init_channel(ioat_dma, ioat_chan, i);
		ioat_chan->xfercap_log = xfercap_log;
		spin_lock_init(&ioat_chan->prep_lock);
		if (ioat_dma->reset_hw(ioat_chan)) {
		i = 0;
		break;
		}
		}
		dma->chancnt = i;
		return i;
		}

		static dma_cookie_t ioat_tx_submit_unlock(struct dma_async_tx_descriptor *tx)
		{
		struct dma_chan *c = tx->chan;
		@@ -741,8 +365,7 @@ ioat_alloc_ring_ent(struct dma_chan *chan, gfp_t flags)
		return desc;
		}

		static void
		ioat_free_ring_ent(struct ioat_ring_ent desc, struct dma_chan chan)
		void ioat_free_ring_ent(struct ioat_ring_ent desc, struct dma_chan chan)
		{
		struct ioatdma_device *ioat_dma;

		@@ -751,7 +374,7 @@ ioat_free_ring_ent(struct ioat_ring_ent desc, struct dma_chan chan)
		kmem_cache_free(ioat_cache, desc);
		}

		static struct ioat_ring_ent **
		struct ioat_ring_ent **
		ioat_alloc_ring(struct dma_chan *c, int order, gfp_t flags)
		{
		struct ioat_ring_ent **ring;
		@@ -788,128 +411,6 @@ ioat_alloc_ring(struct dma_chan *c, int order, gfp_t flags)
		return ring;
		}

		/**
		* ioat_free_chan_resources - release all the descriptors
		* @chan: the channel to be cleaned
		*/
		void ioat_free_chan_resources(struct dma_chan *c)
		{
		struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
		struct ioatdma_device *ioat_dma = ioat_chan->ioat_dma;
		struct ioat_ring_ent *desc;
		const int total_descs = 1 << ioat_chan->alloc_order;
		int descs;
		int i;

		/* Before freeing channel resources first check
		* if they have been previously allocated for this channel.
		*/
		if (!ioat_chan->ring)
		return;

		ioat_stop(ioat_chan);
		ioat_dma->reset_hw(ioat_chan);

		spin_lock_bh(&ioat_chan->cleanup_lock);
		spin_lock_bh(&ioat_chan->prep_lock);
		descs = ioat_ring_space(ioat_chan);
		dev_dbg(to_dev(ioat_chan), "freeing %d idle descriptors\n", descs);
		for (i = 0; i < descs; i++) {
		desc = ioat_get_ring_ent(ioat_chan, ioat_chan->head + i);
		ioat_free_ring_ent(desc, c);
		}

		if (descs < total_descs)
		dev_err(to_dev(ioat_chan), "Freeing %d in use descriptors!\n",
		total_descs - descs);

		for (i = 0; i < total_descs - descs; i++) {
		desc = ioat_get_ring_ent(ioat_chan, ioat_chan->tail + i);
		dump_desc_dbg(ioat_chan, desc);
		ioat_free_ring_ent(desc, c);
		}

		kfree(ioat_chan->ring);
		ioat_chan->ring = NULL;
		ioat_chan->alloc_order = 0;
		pci_pool_free(ioat_dma->completion_pool, ioat_chan->completion,
		ioat_chan->completion_dma);
		spin_unlock_bh(&ioat_chan->prep_lock);
		spin_unlock_bh(&ioat_chan->cleanup_lock);

		ioat_chan->last_completion = 0;
		ioat_chan->completion_dma = 0;
		ioat_chan->dmacount = 0;
		}

		/* ioat_alloc_chan_resources - allocate/initialize ioat descriptor ring
		* @chan: channel to be initialized
		*/
		int ioat_alloc_chan_resources(struct dma_chan *c)
		{
		struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
		struct ioat_ring_ent **ring;
		u64 status;
		int order;
		int i = 0;
		u32 chanerr;

		/* have we already been set up? */
		if (ioat_chan->ring)
		return 1 << ioat_chan->alloc_order;

		/* Setup register to interrupt and write completion status on error */
		writew(IOAT_CHANCTRL_RUN, ioat_chan->reg_base + IOAT_CHANCTRL_OFFSET);

		/* allocate a completion writeback area */
		/* doing 2 32bit writes to mmio since 1 64b write doesn't work */
		ioat_chan->completion =
		pci_pool_alloc(ioat_chan->ioat_dma->completion_pool,
		GFP_KERNEL, &ioat_chan->completion_dma);
		if (!ioat_chan->completion)
		return -ENOMEM;

		memset(ioat_chan->completion, 0, sizeof(*ioat_chan->completion));
		writel(((u64)ioat_chan->completion_dma) & 0x00000000FFFFFFFF,
		ioat_chan->reg_base + IOAT_CHANCMP_OFFSET_LOW);
		writel(((u64)ioat_chan->completion_dma) >> 32,
		ioat_chan->reg_base + IOAT_CHANCMP_OFFSET_HIGH);

		order = ioat_get_alloc_order();
		ring = ioat_alloc_ring(c, order, GFP_KERNEL);
		if (!ring)
		return -ENOMEM;

		spin_lock_bh(&ioat_chan->cleanup_lock);
		spin_lock_bh(&ioat_chan->prep_lock);
		ioat_chan->ring = ring;
		ioat_chan->head = 0;
		ioat_chan->issued = 0;
		ioat_chan->tail = 0;
		ioat_chan->alloc_order = order;
		set_bit(IOAT_RUN, &ioat_chan->state);
		spin_unlock_bh(&ioat_chan->prep_lock);
		spin_unlock_bh(&ioat_chan->cleanup_lock);

		ioat_start_null_desc(ioat_chan);

		/* check that we got off the ground */
		do {
		udelay(1);
		status = ioat_chansts(ioat_chan);
		} while (i++ < 20 && !is_ioat_active(status) && !is_ioat_idle(status));

		if (is_ioat_active(status) \|\| is_ioat_idle(status))
		return 1 << ioat_chan->alloc_order;

		chanerr = readl(ioat_chan->reg_base + IOAT_CHANERR_OFFSET);

		dev_WARN(to_dev(ioat_chan),
		"failed to start channel chanerr: %#x\n", chanerr);
		ioat_free_chan_resources(c);
		return -EFAULT;
		}

		bool reshape_ring(struct ioatdma_chan *ioat_chan, int order)
		{
		/* reshape differs from normal ring allocation in that we want

drivers/dma/ioat/dma.h

+39 −0

Original line number	Diff line number	Diff line
		@@ -381,6 +381,43 @@ ioat_set_chainaddr(struct ioatdma_chan *ioat_chan, u64 addr)
		ioat_chan->reg_base + IOAT2_CHAINADDR_OFFSET_HIGH);
		}

		irqreturn_t ioat_dma_do_interrupt(int irq, void *data);
		irqreturn_t ioat_dma_do_interrupt_msix(int irq, void *data);
		struct ioat_ring_ent **
		ioat_alloc_ring(struct dma_chan *c, int order, gfp_t flags);
		void ioat_start_null_desc(struct ioatdma_chan *ioat_chan);
		void ioat_free_ring_ent(struct ioat_ring_ent desc, struct dma_chan chan);
		int ioat_reset_hw(struct ioatdma_chan *ioat_chan);
		struct dma_async_tx_descriptor *
		ioat_prep_interrupt_lock(struct dma_chan *c, unsigned long flags);
		struct dma_async_tx_descriptor *
		ioat_prep_xor(struct dma_chan chan, dma_addr_t dest, dma_addr_t src,
		unsigned int src_cnt, size_t len, unsigned long flags);
		struct dma_async_tx_descriptor *
		ioat_prep_xor_val(struct dma_chan chan, dma_addr_t src,
		unsigned int src_cnt, size_t len,
		enum sum_check_flags *result, unsigned long flags);
		struct dma_async_tx_descriptor *
		ioat_prep_pq(struct dma_chan chan, dma_addr_t dst, dma_addr_t *src,
		unsigned int src_cnt, const unsigned char *scf, size_t len,
		unsigned long flags);
		struct dma_async_tx_descriptor *
		ioat_prep_pq_val(struct dma_chan chan, dma_addr_t pq, dma_addr_t *src,
		unsigned int src_cnt, const unsigned char *scf, size_t len,
		enum sum_check_flags *pqres, unsigned long flags);
		struct dma_async_tx_descriptor *
		ioat_prep_pqxor(struct dma_chan chan, dma_addr_t dst, dma_addr_t src,
		unsigned int src_cnt, size_t len, unsigned long flags);
		struct dma_async_tx_descriptor *
		ioat_prep_pqxor_val(struct dma_chan chan, dma_addr_t src,
		unsigned int src_cnt, size_t len,
		enum sum_check_flags *result, unsigned long flags);
		enum dma_status
		ioat_tx_status(struct dma_chan *c, dma_cookie_t cookie,
		struct dma_tx_state *txstate);
		void ioat_cleanup_event(unsigned long data);
		void ioat_timer_event(unsigned long data);
		bool is_bwd_ioat(struct pci_dev *pdev);
		int ioat_probe(struct ioatdma_device *ioat_dma);
		int ioat_register(struct ioatdma_device *ioat_dma);
		int ioat_dma_self_test(struct ioatdma_device *ioat_dma);
		@@ -421,5 +458,7 @@ extern int ioat_pending_level;
		extern int ioat_ring_alloc_order;
		extern struct kobj_type ioat_ktype;
		extern struct kmem_cache *ioat_cache;
		extern int ioat_ring_max_alloc_order;
		extern struct kmem_cache *ioat_sed_cache;

		#endif /* IOATDMA_H */

drivers/dma/ioat/dma_v3.c

+37 −589

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drivers/dma/ioat/init.c

0 → 100644

+1293 −0

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