uacce: support UACCE_MODE_NOIOMMU mode (c0b0e895) · Commits · EulixOS / Software / Kernel

drivers/misc/uacce/Kconfig

+2 −1

Original line number	Diff line number	Diff line
		config UACCE
		menuconfig UACCE
		tristate "Accelerator Framework for User Land"
		depends on IOMMU_API
		select ANON_INODES
		help
		UACCE provides interface for the user process to access the hardware
		without interaction with the kernel space in data path.

drivers/misc/uacce/uacce.c

+441 −10

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0-or-later
		#include <linux/compat.h>
		#include <linux/dma-mapping.h>
		#include <linux/file.h>
		#include <linux/iommu.h>
		#include <linux/module.h>
		#include <linux/poll.h>
		#include <linux/slab.h>
		#include <linux/uacce.h>
		#include <linux/wait.h>

		static dev_t uacce_devt;
		static DEFINE_XARRAY_ALLOC(uacce_xa);
		static const struct file_operations uacce_fops;

		static const struct class uacce_class = {
		.name = UACCE_NAME,
		};

		static struct uacce_qfile_region noiommu_ss_default_qfr = {
		.type = UACCE_QFRT_SS,
		};

		/*
		* If the parent driver or the device disappears, the queue state is invalid and
		* ops are not usable anymore.
		@@ -56,6 +63,141 @@ static int uacce_put_queue(struct uacce_queue *q)
		return 0;
		}

		static long uacce_cmd_share_qfr(struct uacce_queue *src, int fd)
		{
		struct device *dev = &src->uacce->dev;
		struct file *filep = fget(fd);
		struct uacce_queue *tgt;
		int ret = -EINVAL;

		if (!filep) {
		dev_err(dev, "filep is NULL!\n");
		return ret;
		}

		if (filep->f_op != &uacce_fops) {
		dev_err(dev, "file ops mismatch!\n");
		goto out_with_fd;
		}

		tgt = filep->private_data;
		if (!tgt) {
		dev_err(dev, "target queue is not exist!\n");
		goto out_with_fd;
		}

		mutex_lock(&src->mutex);
		if (tgt->state == UACCE_Q_ZOMBIE \|\| src->state == UACCE_Q_ZOMBIE) {
		dev_err(dev, "target or source queue is zombie!\n");
		goto out_with_fd;
		}

		if (!src->qfrs[UACCE_QFRT_SS] \|\| tgt->qfrs[UACCE_QFRT_SS]) {
		dev_err(dev, "src q's SS not exists or target q's SS exists!\n");
		goto out_with_fd;
		}

		/* In No-IOMMU mode, taget queue uses default SS qfr */
		tgt->qfrs[UACCE_QFRT_SS] = &noiommu_ss_default_qfr;

		ret = 0;

		out_with_fd:
		mutex_unlock(&src->mutex);
		fput(filep);

		return ret;
		}

		static long uacce_get_ss_dma(struct uacce_queue q, void __user arg)
		{
		struct uacce_device *uacce = q->uacce;
		struct uacce_dma_slice *slice;
		unsigned long slice_idx = 0;
		unsigned long dma, size;
		unsigned int max_idx;
		long ret = -EFAULT;

		if (q->state == UACCE_Q_ZOMBIE) {
		dev_err(&uacce->dev, "queue is zombie!\n");
		ret = -EINVAL;
		goto param_check;
		}

		if (!q->qfrs[UACCE_QFRT_SS]) {
		dev_err(&uacce->dev, "no ss dma region!\n");
		ret = -EINVAL;
		goto param_check;
		}

		slice = q->qfrs[UACCE_QFRT_SS]->dma_list;
		if (copy_from_user(&slice_idx, arg, sizeof(unsigned long))) {
		dev_err(&uacce->dev, "copy_from_user fail!\n");
		goto param_check;
		}

		if (slice[0].total_num - 1 < slice_idx) {
		dev_err(&uacce->dev, "no ss slice idx %lu err, total %u!\n",
		slice_idx, slice[0].total_num);
		ret = -EINVAL;
		goto param_check;
		}

		dma = slice[slice_idx].dma;
		size = slice[slice_idx].size;
		if (!size) {
		max_idx = slice[0].total_num - 1;
		dev_err(&uacce->dev, "%luth ss region[size = %lu] no exist, range[[0](size = %llu) -> [%u](size = %llu)]\n",
		slice_idx, size, slice[0].size, max_idx, slice[max_idx].size);
		ret = -ENODEV;
		goto param_check;
		}
		dma = dma \| ((size >> UACCE_GRAN_SHIFT) & UACCE_GRAN_NUM_MASK);
		if (copy_to_user(arg, &dma, sizeof(unsigned long))) {
		dev_err(&uacce->dev, "copy_to_user fail!\n");
		goto param_check;
		}

		ret = (long)(slice[0].total_num - 1 - slice_idx);

		param_check:
		return ret;
		}

		static void uacce_free_dma_buffers(struct uacce_queue *q)
		{
		struct uacce_qfile_region *qfr = q->qfrs[UACCE_QFRT_SS];
		struct device *pdev = q->uacce->parent;
		int i = 0;

		if (!qfr->dma_list)
		return;

		while (i < qfr->dma_list[0].total_num) {
		WARN_ON(!qfr->dma_list[i].size \|\| !qfr->dma_list[i].dma);
		dev_dbg(pdev, "free dma qfr (index = %d)\n", i);
		dma_free_coherent(pdev, qfr->dma_list[i].size,
		qfr->dma_list[i].kaddr,
		qfr->dma_list[i].dma);
		i++;
		}
		kfree(qfr->dma_list);
		qfr->dma_list = NULL;
		}

		/**
		* uacce_wake_up - Wake up the process who is waiting this queue
		* @q: the accelerator queue to wake up
		*/
		void uacce_wake_up(struct uacce_queue *q)
		{
		if (unlikely(!q))
		return;

		wake_up_interruptible(&q->wait);
		}
		EXPORT_SYMBOL_GPL(uacce_wake_up);

		static long uacce_fops_unl_ioctl(struct file *filep,
		unsigned int cmd, unsigned long arg)
		{
		@@ -82,6 +224,12 @@ static long uacce_fops_unl_ioctl(struct file *filep,
		case UACCE_CMD_PUT_Q:
		ret = uacce_put_queue(q);
		break;
		case UACCE_CMD_SHARE_SVAS:
		ret = uacce_cmd_share_qfr(q, (int)arg);
		break;
		case UACCE_CMD_GET_SS_DMA:
		ret = uacce_get_ss_dma(q, (void __user *)(uintptr_t)arg);
		break;
		default:
		if (uacce->ops->ioctl)
		ret = uacce->ops->ioctl(q, cmd, arg);
		@@ -97,7 +245,7 @@ static long uacce_fops_unl_ioctl(struct file *filep,
		static long uacce_fops_compat_ioctl(struct file *filep,
		unsigned int cmd, unsigned long arg)
		{
		arg = (unsigned long)compat_ptr(arg);
		arg = (unsigned long)(uintptr_t)compat_ptr(arg);

		return uacce_fops_unl_ioctl(filep, cmd, arg);
		}
		@@ -160,6 +308,7 @@ static int uacce_fops_open(struct inode inode, struct file filep)
		goto out_with_mem;

		q->uacce = uacce;
		q->filep = filep;

		if (uacce->ops->get_queue) {
		ret = uacce->ops->get_queue(uacce, q->pasid, q);
		@@ -189,10 +338,16 @@ static int uacce_fops_release(struct inode inode, struct file filep)
		{
		struct uacce_queue *q = filep->private_data;
		struct uacce_device *uacce = q->uacce;
		struct uacce_qfile_region *ss;

		mutex_lock(&uacce->mutex);
		uacce_put_queue(q);
		uacce_unbind_queue(q);
		ss = q->qfrs[UACCE_QFRT_SS];
		if (ss && ss != &noiommu_ss_default_qfr) {
		uacce_free_dma_buffers(q);
		kfree(ss);
		}
		list_del(&q->list);
		mutex_unlock(&uacce->mutex);
		kfree(q);
		@@ -203,10 +358,33 @@ static int uacce_fops_release(struct inode inode, struct file filep)
		static void uacce_vma_close(struct vm_area_struct *vma)
		{
		struct uacce_queue *q = vma->vm_private_data;
		struct uacce_qfile_region *qfr = NULL;
		struct uacce_device *uacce = q->uacce;
		struct device *dev = &q->uacce->dev;

		if (vma->vm_pgoff < UACCE_MAX_REGION) {
		struct uacce_qfile_region *qfr = q->qfrs[vma->vm_pgoff];
		if (vma->vm_pgoff >= UACCE_MAX_REGION)
		return;

		qfr = q->qfrs[vma->vm_pgoff];
		if (!qfr) {
		dev_err(dev, "qfr NULL, type %lu!\n", vma->vm_pgoff);
		return;
		}

		if (qfr->type == UACCE_QFRT_SS &&
		atomic_read(&current->active_mm->mm_users) > 0) {
		/*
		* uacce_vma_close() and uacce_remove() may be executed concurrently.
		* To avoid accessing the same address at the same time, takes the uacce->mutex.
		*/
		mutex_lock(&uacce->mutex);
		if ((q->state == UACCE_Q_STARTED) && uacce->ops->stop_queue)
		uacce->ops->stop_queue(q);
		uacce_free_dma_buffers(q);
		q->qfrs[vma->vm_pgoff] = NULL;
		mutex_unlock(&uacce->mutex);
		kfree(qfr);
		} else if (qfr->type != UACCE_QFRT_SS) {
		mutex_lock(&q->mutex);
		q->qfrs[vma->vm_pgoff] = NULL;
		mutex_unlock(&q->mutex);
		@@ -218,6 +396,212 @@ static const struct vm_operations_struct uacce_vm_ops = {
		.close = uacce_vma_close,
		};

		static int get_sort_base(struct uacce_dma_slice *list, int low, int high,
		struct uacce_dma_slice *tmp)
		{
		tmp->kaddr = list[low].kaddr;
		tmp->size = list[low].size;
		tmp->dma = list[low].dma;

		if (low > high)
		return -EINVAL;
		else if (low == high)
		return 0;

		while (low < high) {
		while (low < high && list[high].dma > tmp->dma)
		high--;
		list[low].kaddr = list[high].kaddr;
		list[low].dma = list[high].dma;
		list[low].size = list[high].size;
		while (low < high && list[low].dma < tmp->dma)
		low++;
		list[high].kaddr = list[low].kaddr;
		list[high].dma = list[low].dma;
		list[high].size = list[low].size;
		}
		list[low].kaddr = tmp->kaddr;
		list[low].dma = tmp->dma;
		list[low].size = tmp->size;

		return low;
		}

		static int uacce_sort_dma_buffers(struct uacce_dma_slice *list, int low,
		int high, struct uacce_dma_slice *tmp)
		{
		int *idx_list;
		int top = 0;
		int pilot;

		idx_list = kcalloc(list[0].total_num, sizeof(int),
		GFP_KERNEL \| __GFP_ZERO);
		if (!idx_list)
		return -ENOMEM;

		pilot = get_sort_base(list, low, high, tmp);
		if (pilot <= 0) {
		if (pilot)
		pr_err("fail to sort base!\n");
		kfree(idx_list);
		return pilot;
		}

		if (pilot > low + 1) {
		idx_list[top++] = low;
		idx_list[top++] = pilot - 1;
		}
		if (pilot < high - 1) {
		idx_list[top++] = pilot + 1;
		idx_list[top++] = high;
		}
		while (top > 0) {
		high = idx_list[--top];
		low = idx_list[--top];
		pilot = get_sort_base(list, low, high, tmp);
		if (pilot > low + 1) {
		idx_list[top++] = low;
		idx_list[top++] = pilot - 1;
		}
		if (pilot < high - 1) {
		idx_list[top++] = pilot + 1;
		idx_list[top++] = high;
		}
		}

		kfree(idx_list);
		return 0;
		}

		static int uacce_alloc_dma_buffers(struct uacce_queue *q,
		struct vm_area_struct *vma)
		{
		struct uacce_qfile_region *qfr = q->qfrs[UACCE_QFRT_SS];
		unsigned long size = vma->vm_end - vma->vm_start;
		unsigned long max_size = PAGE_SIZE << (MAX_ORDER - 1);
		struct device *pdev = q->uacce->parent;
		struct uacce_device *uacce = q->uacce;
		unsigned long start = vma->vm_start;
		struct uacce_dma_slice *slice;
		unsigned long ss_num;
		int ret, i;

		/*
		* When IOMMU closed, set maximum slice size is 128M, default is 4M
		* when IOMMU opened, set maxinum slice size base on actual size
		*/
		if (uacce->flags & UACCE_DEV_IOMMU)
		max_size = size;
		else if (max_size > UACCE_GRAN_NUM_MASK << UACCE_GRAN_SHIFT)
		max_size = (UACCE_GRAN_NUM_MASK + 1) << (UACCE_GRAN_SHIFT - 1);

		ss_num = size / max_size + (size % max_size ? 1 : 0);
		slice = kcalloc(ss_num + 1, sizeof(*slice), GFP_KERNEL \| __GFP_ZERO);
		if (!slice)
		return -ENOMEM;

		qfr->dma_list = slice;
		for (i = 0; i < ss_num; i++) {
		if (start + max_size > vma->vm_end)
		size = vma->vm_end - start;
		else
		size = max_size;
		dev_dbg(pdev, "allocate dma %ld pages\n",
		(size + PAGE_SIZE - 1) >> PAGE_SHIFT);
		slice[i].kaddr = dma_alloc_coherent(pdev, (size +
		PAGE_SIZE - 1) & PAGE_MASK,
		&slice[i].dma, GFP_KERNEL);
		if (!slice[i].kaddr) {
		dev_err(pdev, "get dma slice(sz = %lu, dma index = %d) fail!\n",
		size, i);
		slice[0].total_num = i;
		ret = -ENOMEM;
		goto free_buffer;
		}
		slice[i].size = (size + PAGE_SIZE - 1) & PAGE_MASK;
		slice[i].total_num = ss_num;
		start += size;
		}

		ret = uacce_sort_dma_buffers(slice, 0, slice[0].total_num - 1,
		&slice[ss_num]);
		if (ret) {
		dev_err(pdev, "failed to sort dma buffers.\n");
		goto free_buffer;
		}

		return 0;
		free_buffer:
		uacce_free_dma_buffers(q);

		return ret;
		}

		static int uacce_mmap_dma_buffers(struct uacce_queue *q,
		struct vm_area_struct *vma)
		{
		struct uacce_qfile_region *qfr = q->qfrs[UACCE_QFRT_SS];
		struct uacce_dma_slice *slice = qfr->dma_list;
		struct device *pdev = q->uacce->parent;
		unsigned long vm_pgoff;
		int ret = 0;
		int i = 0;

		/*
		* dma_mmap_coherent() requires vm_pgoff as 0
		* restore vm_pfoff to initial value for mmap()
		*/
		vm_pgoff = vma->vm_pgoff;
		vma->vm_pgoff = 0;
		while (i < slice[0].total_num && slice[i].size) {
		vma->vm_end = vma->vm_start + slice[i].size;
		ret = dma_mmap_coherent(pdev, vma, slice[i].kaddr,
		slice[i].dma,
		slice[i].size);
		if (ret) {
		dev_err(pdev, "dma mmap fail(dma index = %d, size = %llu)!\n",
		i, slice[i].size);
		goto DMA_MMAP_FAIL;
		}

		i++;
		vma->vm_start = vma->vm_end;
		}

		/* System unmap_region will clean the results, we need do nothing */
		DMA_MMAP_FAIL:
		vma->vm_pgoff = vm_pgoff;
		vma->vm_start = qfr->iova;
		vma->vm_end = vma->vm_start + (qfr->nr_pages << PAGE_SHIFT);

		return ret;
		}

		static int uacce_create_region(struct uacce_queue *q,
		struct vm_area_struct *vma,
		struct uacce_qfile_region *qfr)
		{
		int ret;

		qfr->iova = vma->vm_start;
		qfr->nr_pages = vma_pages(vma);

		/* allocate memory */
		ret = uacce_alloc_dma_buffers(q, vma);
		if (ret)
		return ret;

		ret = uacce_mmap_dma_buffers(q, vma);
		if (ret)
		goto err_with_pages;

		return ret;

		err_with_pages:
		uacce_free_dma_buffers(q);
		return ret;
		}

		static int uacce_fops_mmap(struct file filep, struct vm_area_struct vma)
		{
		struct uacce_queue *q = filep->private_data;
		@@ -231,6 +615,9 @@ static int uacce_fops_mmap(struct file filep, struct vm_area_struct vma)
		else
		return -EINVAL;

		if (q->qfrs[type])
		return -EEXIST;

		qfr = kzalloc(sizeof(*qfr), GFP_KERNEL);
		if (!qfr)
		return -ENOMEM;
		@@ -246,10 +633,7 @@ static int uacce_fops_mmap(struct file filep, struct vm_area_struct vma)
		goto out_with_lock;
		}

		if (q->qfrs[type]) {
		ret = -EEXIST;
		goto out_with_lock;
		}
		q->qfrs[type] = qfr;

		switch (type) {
		case UACCE_QFRT_MMIO:
		@@ -264,12 +648,17 @@ static int uacce_fops_mmap(struct file filep, struct vm_area_struct vma)
		goto out_with_lock;
		break;

		case UACCE_QFRT_SS:
		ret = uacce_create_region(q, vma, qfr);
		if (ret)
		goto out_with_lock;
		break;

		default:
		ret = -EINVAL;
		goto out_with_lock;
		}

		q->qfrs[type] = qfr;
		mutex_unlock(&q->mutex);

		return ret;
		@@ -277,6 +666,7 @@ static int uacce_fops_mmap(struct file filep, struct vm_area_struct vma)
		out_with_lock:
		mutex_unlock(&q->mutex);
		kfree(qfr);
		q->qfrs[type] = NULL;
		return ret;
		}

		@@ -407,24 +797,55 @@ static ssize_t isolate_strategy_store(struct device *dev, struct device_attribut
		return count;
		}

		static ssize_t node_id_show(struct device *dev,
		struct device_attribute attr, char buf)
		{
		int node_id = -1;

		#ifdef CONFIG_NUMA
		struct uacce_device *uacce = to_uacce_device(dev);

		node_id = uacce->parent->numa_node;
		#endif
		return sysfs_emit(buf, "%d\n", node_id);
		}

		static ssize_t numa_distance_show(struct device *dev,
		struct device_attribute attr, char buf)
		{
		int distance = 0;

		#ifdef CONFIG_NUMA
		struct uacce_device *uacce = to_uacce_device(dev);

		distance = node_distance(uacce->parent->numa_node,
		cpu_to_node(smp_processor_id()));
		#endif
		return sysfs_emit(buf, "%d\n", distance);
		}

		static DEVICE_ATTR_RO(api);
		static DEVICE_ATTR_RO(flags);
		static DEVICE_ATTR_RO(node_id);
		static DEVICE_ATTR_RO(available_instances);
		static DEVICE_ATTR_RO(algorithms);
		static DEVICE_ATTR_RO(region_mmio_size);
		static DEVICE_ATTR_RO(region_dus_size);
		static DEVICE_ATTR_RO(isolate);
		static DEVICE_ATTR_RW(isolate_strategy);
		static DEVICE_ATTR_RO(numa_distance);

		static struct attribute *uacce_dev_attrs[] = {
		&dev_attr_api.attr,
		&dev_attr_flags.attr,
		&dev_attr_node_id.attr,
		&dev_attr_available_instances.attr,
		&dev_attr_algorithms.attr,
		&dev_attr_region_mmio_size.attr,
		&dev_attr_region_dus_size.attr,
		&dev_attr_isolate.attr,
		&dev_attr_isolate_strategy.attr,
		&dev_attr_numa_distance.attr,
		NULL,
		};

		@@ -510,14 +931,18 @@ static void uacce_disable_sva(struct uacce_device *uacce)
		struct uacce_device uacce_alloc(struct device parent,
		struct uacce_interface *interface)
		{
		unsigned int flags = interface->flags;
		struct uacce_device *uacce;
		unsigned int flags;
		int ret;

		if (!parent \|\| !interface)
		return ERR_PTR(-EINVAL);

		uacce = kzalloc(sizeof(struct uacce_device), GFP_KERNEL);
		if (!uacce)
		return ERR_PTR(-ENOMEM);

		flags = interface->flags;
		flags = uacce_enable_sva(parent, flags);

		uacce->parent = parent;
		@@ -537,7 +962,10 @@ struct uacce_device uacce_alloc(struct device parent,
		uacce->dev.groups = uacce_dev_groups;
		uacce->dev.parent = uacce->parent;
		uacce->dev.release = uacce_release;
		dev_set_name(&uacce->dev, "%s-%d", interface->name, uacce->dev_id);
		dev_set_name(&uacce->dev, "%s-%u", interface->name, uacce->dev_id);

		if (flags & UACCE_DEV_NOIOMMU)
		dev_warn(&uacce->dev, "register to noiommu mode, it's not safe for kernel\n");

		return uacce;

		@@ -589,6 +1017,7 @@ void uacce_remove(struct uacce_device *uacce)
		mutex_lock(&uacce->mutex);
		/* ensure no open queue remains */
		list_for_each_entry_safe(q, next_q, &uacce->queues, list) {
		struct uacce_qfile_region *ss = q->qfrs[UACCE_QFRT_SS];
		/*
		* Taking q->mutex ensures that fops do not use the defunct
		* uacce->ops after the queue is disabled.
		@@ -603,6 +1032,8 @@ void uacce_remove(struct uacce_device *uacce)
		* access the mmaped area while parent device is already removed
		*/
		unmap_mapping_range(q->mapping, 0, 0, 1);
		if (ss && ss != &noiommu_ss_default_qfr)
		uacce_free_dma_buffers(q);
		}

		/* disable sva now since no opened queues */

include/linux/uacce.h

+29 −2

Original line number	Diff line number	Diff line
		@@ -3,22 +3,40 @@
		#define _LINUX_UACCE_H

		#include <linux/cdev.h>
		#include <linux/device.h>
		#include <linux/fs.h>
		#include <linux/list.h>
		#include <linux/iommu.h>
		#include <uapi/misc/uacce/uacce.h>

		#define UACCE_NAME "uacce"
		#define UACCE_MAX_REGION 2
		#define UACCE_MAX_REGION 3
		#define UACCE_MAX_NAME_SIZE 64
		#define UACCE_MAX_ERR_THRESHOLD 65535

		struct uacce_queue;
		struct uacce_device;

		struct uacce_dma_slice {
		void kaddr; / kernel address for ss */
		dma_addr_t dma; /* dma address, if created by dma api */
		u64 size; /* Size of this dma slice */
		u32 total_num; /* Total slices in this dma list */
		};

		/**
		* struct uacce_qfile_region - structure of queue file region
		* @type: type of the region
		*/
		struct uacce_qfile_region {
		enum uacce_qfrt type;
		unsigned long iova; /* iova share between user and device space */
		unsigned long nr_pages;
		int prot;
		unsigned int flags;
		struct list_head qs; /* qs sharing the same region, for ss */
		void kaddr; / kernel address for dko */
		struct uacce_dma_slice *dma_list;
		};

		/**
		@@ -29,11 +47,14 @@ struct uacce_qfile_region {
		* @start_queue: make the queue start work after get_queue
		* @stop_queue: make the queue stop work before put_queue
		* @is_q_updated: check whether the task is finished
		* @mask_notify: mask the task irq of queue
		* @mmap: mmap addresses of queue to user space
		* @ioctl: ioctl for user space users of the queue
		* @get_isolate_state: get the device state after set the isolate strategy
		* @isolate_err_threshold_write: stored the isolate error threshold to the device
		* @isolate_err_threshold_read: read the isolate error threshold value from the device
		* @reset: reset the WD device
		* @reset_queue: reset the queue
		*/
		struct uacce_ops {
		int (get_available_instances)(struct uacce_device uacce);
		@@ -65,6 +86,7 @@ struct uacce_interface {
		};

		enum uacce_dev_state {
		UACCE_DEV_ERR = -1,
		UACCE_DEV_NORMAL,
		UACCE_DEV_ISOLATE,
		};
		@@ -90,11 +112,14 @@ enum uacce_q_state {
		*/
		struct uacce_queue {
		struct uacce_device *uacce;
		u32 flags;
		atomic_t status;
		void *priv;
		wait_queue_head_t wait;
		struct list_head list;
		struct uacce_qfile_region *qfrs[UACCE_MAX_REGION];
		struct mutex mutex;
		struct file *filep;
		enum uacce_q_state state;
		u32 pasid;
		struct iommu_sva *handle;
		@@ -120,6 +145,7 @@ struct uacce_queue {
		struct uacce_device {
		const char *algs;
		const char *api_ver;
		int status;
		const struct uacce_ops *ops;
		unsigned long qf_pg_num[UACCE_MAX_REGION];
		struct device *parent;
		@@ -139,7 +165,7 @@ struct uacce_device uacce_alloc(struct device parent,
		struct uacce_interface *interface);
		int uacce_register(struct uacce_device *uacce);
		void uacce_remove(struct uacce_device *uacce);

		void uacce_wake_up(struct uacce_queue *q);
		#else /* CONFIG_UACCE */

		static inline
		@@ -156,6 +182,7 @@ static inline int uacce_register(struct uacce_device *uacce)

		static inline void uacce_remove(struct uacce_device *uacce) {}

		static inline void uacce_wake_up(struct uacce_queue *q) {}
		#endif /* CONFIG_UACCE */

		#endif /* _LINUX_UACCE_H */

include/uapi/misc/uacce/uacce.h

+45 −8

Original line number	Diff line number	Diff line
		/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
		/* SPDX-License-Identifier: GPL-2.0-or-later WITH Linux-syscall-note */
		/* Copyright (c) 2018-2019 HiSilicon Limited. */
		#ifndef _UAPIUUACCE_H
		#define _UAPIUUACCE_H

		#include <linux/types.h>
		#include <linux/ioctl.h>

		#define UACCE_CLASS_NAME "uacce"
		/*
		* UACCE_CMD_START_Q: Start queue
		*/
		@@ -17,22 +19,57 @@
		*/
		#define UACCE_CMD_PUT_Q _IO('W', 1)

		/*
		* UACCE Device flags:
		* UACCE_DEV_SVA: Shared Virtual Addresses
		* Support PASID
		* Support device page faults (PCI PRI or SMMU Stall)
		#define UACCE_CMD_SHARE_SVAS _IO('W', 2)

		#define UACCE_CMD_GET_SS_DMA _IOR('W', 3, unsigned long)


		/**
		* UACCE Device Attributes:
		*
		* NOIOMMU: the device has no IOMMU support
		* can do ssva, but no map to the dev
		* IOMMU: the device has IOMMU support and enable __IOMMU_DOMAIN_PAGING
		* PASID: the device has IOMMU which support PASID setting
		* can do ssva, mapped to dev per process
		* FAULT_FROM_DEV: the device has IOMMU which can do page fault request
		* no need for ssva, should be used with PASID
		* KMAP_DUS: map the Device user-shared space to kernel
		* DRVMAP_DUS: Driver self-maintain its DUS
		* SVA: full function device
		* SHARE_DOMAIN: no PASID, can do ssva only for one process and the kernel
		*/
		#define UACCE_DEV_SVA BIT(0)
		#define UACCE_DEV_NOIOMMU BIT(1)
		#define UACCE_DEV_IOMMU BIT(7)


		/* uacce mode of the driver */
		#define UACCE_MODE_NOUACCE 0 /* don't use uacce */
		#define UACCE_MODE_SVA 1 /* use uacce sva mode */
		#define UACCE_MODE_NOIOMMU 2 /* use uacce noiommu mode */

		#define UACCE_API_VER_NOIOMMU_SUBFIX "_noiommu"

		#define UACCE_QFR_NA ((unsigned long)-1)

		/**
		* enum uacce_qfrt: queue file region type
		* @UACCE_QFRT_MMIO: device mmio region
		* @UACCE_QFRT_DUS: device user share region
		* @UACCE_QFRT_SS: static share memory(no-sva)
		*/
		enum uacce_qfrt {
		UACCE_QFRT_MMIO = 0,
		UACCE_QFRT_DUS = 1,
		UACCE_QFRT_MMIO = 0, /* device mmio region */
		UACCE_QFRT_DUS, /* device user share */
		UACCE_QFRT_SS, /* static share memory */
		UACCE_QFRT_MAX,
		};
		#define UACCE_QFRT_INVALID UACCE_QFRT_MAX

		/* Pass DMA SS region slice size by granularity 64KB */
		#define UACCE_GRAN_SIZE 0x10000ull
		#define UACCE_GRAN_SHIFT 16
		#define UACCE_GRAN_NUM_MASK 0xfffull

		#endif