[thirdparty/linux.git] / drivers / vdpa / ifcvf / ifcvf_main.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Intel IFC VF NIC driver for virtio dataplane offloading
 *
 * Copyright (C) 2020 Intel Corporation.
 *
 * Author: Zhu Lingshan <lingshan.zhu@intel.com>
 *
 */

#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/sysfs.h>
#include "ifcvf_base.h"

#define VERSION_STRING  "0.1"
#define DRIVER_AUTHOR   "Intel Corporation"
#define IFCVF_DRIVER_NAME       "ifcvf"

static irqreturn_t ifcvf_intr_handler(int irq, void *arg)
{
	struct vring_info *vring = arg;

	if (vring->cb.callback)
		return vring->cb.callback(vring->cb.private);

	return IRQ_HANDLED;
}

static int ifcvf_start_datapath(void *private)
{
	struct ifcvf_hw *vf = ifcvf_private_to_vf(private);
	u8 status;
	int ret;

	vf->nr_vring = IFCVF_MAX_QUEUE_PAIRS * 2;
	ret = ifcvf_start_hw(vf);
	if (ret < 0) {
		status = ifcvf_get_status(vf);
		status |= VIRTIO_CONFIG_S_FAILED;
		ifcvf_set_status(vf, status);
	}

	return ret;
}

static int ifcvf_stop_datapath(void *private)
{
	struct ifcvf_hw *vf = ifcvf_private_to_vf(private);
	int i;

	for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++)
		vf->vring[i].cb.callback = NULL;

	ifcvf_stop_hw(vf);

	return 0;
}

static void ifcvf_reset_vring(struct ifcvf_adapter *adapter)
{
	struct ifcvf_hw *vf = ifcvf_private_to_vf(adapter);
	int i;

	for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++) {
		vf->vring[i].last_avail_idx = 0;
		vf->vring[i].desc = 0;
		vf->vring[i].avail = 0;
		vf->vring[i].used = 0;
		vf->vring[i].ready = 0;
		vf->vring[i].cb.callback = NULL;
		vf->vring[i].cb.private = NULL;
	}

	ifcvf_reset(vf);
}

static struct ifcvf_adapter *vdpa_to_adapter(struct vdpa_device *vdpa_dev)
{
	return container_of(vdpa_dev, struct ifcvf_adapter, vdpa);
}

static struct ifcvf_hw *vdpa_to_vf(struct vdpa_device *vdpa_dev)
{
	struct ifcvf_adapter *adapter = vdpa_to_adapter(vdpa_dev);

	return &adapter->vf;
}

static u64 ifcvf_vdpa_get_features(struct vdpa_device *vdpa_dev)
{
	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
	u64 features;

	features = ifcvf_get_features(vf) & IFCVF_SUPPORTED_FEATURES;

	return features;
}

static int ifcvf_vdpa_set_features(struct vdpa_device *vdpa_dev, u64 features)
{
	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);

	vf->req_features = features;

	return 0;
}

static u8 ifcvf_vdpa_get_status(struct vdpa_device *vdpa_dev)
{
	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);

	return ifcvf_get_status(vf);
}

static void ifcvf_vdpa_set_status(struct vdpa_device *vdpa_dev, u8 status)
{
	struct ifcvf_adapter *adapter;
	struct ifcvf_hw *vf;

	vf  = vdpa_to_vf(vdpa_dev);
	adapter = dev_get_drvdata(vdpa_dev->dev.parent);

	if (status == 0) {
		ifcvf_stop_datapath(adapter);
		ifcvf_reset_vring(adapter);
		return;
	}

	if (status & VIRTIO_CONFIG_S_DRIVER_OK) {
		if (ifcvf_start_datapath(adapter) < 0)
			IFCVF_ERR(adapter->pdev,
				  "Failed to set ifcvf vdpa  status %u\n",
				  status);
	}

	ifcvf_set_status(vf, status);
}

static u16 ifcvf_vdpa_get_vq_num_max(struct vdpa_device *vdpa_dev)
{
	return IFCVF_QUEUE_MAX;
}

static u64 ifcvf_vdpa_get_vq_state(struct vdpa_device *vdpa_dev, u16 qid)
{
	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);

	return ifcvf_get_vq_state(vf, qid);
}

static int ifcvf_vdpa_set_vq_state(struct vdpa_device *vdpa_dev, u16 qid,
				   u64 num)
{
	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);

	return ifcvf_set_vq_state(vf, qid, num);
}

static void ifcvf_vdpa_set_vq_cb(struct vdpa_device *vdpa_dev, u16 qid,
				 struct vdpa_callback *cb)
{
	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);

	vf->vring[qid].cb = *cb;
}

static void ifcvf_vdpa_set_vq_ready(struct vdpa_device *vdpa_dev,
				    u16 qid, bool ready)
{
	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);

	vf->vring[qid].ready = ready;
}

static bool ifcvf_vdpa_get_vq_ready(struct vdpa_device *vdpa_dev, u16 qid)
{
	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);

	return vf->vring[qid].ready;
}

static void ifcvf_vdpa_set_vq_num(struct vdpa_device *vdpa_dev, u16 qid,
				  u32 num)
{
	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);

	vf->vring[qid].size = num;
}

static int ifcvf_vdpa_set_vq_address(struct vdpa_device *vdpa_dev, u16 qid,
				     u64 desc_area, u64 driver_area,
				     u64 device_area)
{
	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);

	vf->vring[qid].desc = desc_area;
	vf->vring[qid].avail = driver_area;
	vf->vring[qid].used = device_area;

	return 0;
}

static void ifcvf_vdpa_kick_vq(struct vdpa_device *vdpa_dev, u16 qid)
{
	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);

	ifcvf_notify_queue(vf, qid);
}

static u32 ifcvf_vdpa_get_generation(struct vdpa_device *vdpa_dev)
{
	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);

	return ioread8(&vf->common_cfg->config_generation);
}

static u32 ifcvf_vdpa_get_device_id(struct vdpa_device *vdpa_dev)
{
	return VIRTIO_ID_NET;
}

static u32 ifcvf_vdpa_get_vendor_id(struct vdpa_device *vdpa_dev)
{
	return IFCVF_SUBSYS_VENDOR_ID;
}

static u32 ifcvf_vdpa_get_vq_align(struct vdpa_device *vdpa_dev)
{
	return IFCVF_QUEUE_ALIGNMENT;
}

static void ifcvf_vdpa_get_config(struct vdpa_device *vdpa_dev,
				  unsigned int offset,
				  void *buf, unsigned int len)
{
	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);

	WARN_ON(offset + len > sizeof(struct virtio_net_config));
	ifcvf_read_net_config(vf, offset, buf, len);
}

static void ifcvf_vdpa_set_config(struct vdpa_device *vdpa_dev,
				  unsigned int offset, const void *buf,
				  unsigned int len)
{
	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);

	WARN_ON(offset + len > sizeof(struct virtio_net_config));
	ifcvf_write_net_config(vf, offset, buf, len);
}

static void ifcvf_vdpa_set_config_cb(struct vdpa_device *vdpa_dev,
				     struct vdpa_callback *cb)
{
	/* We don't support config interrupt */
}

/*
 * IFCVF currently does't have on-chip IOMMU, so not
 * implemented set_map()/dma_map()/dma_unmap()
 */
static const struct vdpa_config_ops ifc_vdpa_ops = {
	.get_features	= ifcvf_vdpa_get_features,
	.set_features	= ifcvf_vdpa_set_features,
	.get_status	= ifcvf_vdpa_get_status,
	.set_status	= ifcvf_vdpa_set_status,
	.get_vq_num_max	= ifcvf_vdpa_get_vq_num_max,
	.get_vq_state	= ifcvf_vdpa_get_vq_state,
	.set_vq_state	= ifcvf_vdpa_set_vq_state,
	.set_vq_cb	= ifcvf_vdpa_set_vq_cb,
	.set_vq_ready	= ifcvf_vdpa_set_vq_ready,
	.get_vq_ready	= ifcvf_vdpa_get_vq_ready,
	.set_vq_num	= ifcvf_vdpa_set_vq_num,
	.set_vq_address	= ifcvf_vdpa_set_vq_address,
	.kick_vq	= ifcvf_vdpa_kick_vq,
	.get_generation	= ifcvf_vdpa_get_generation,
	.get_device_id	= ifcvf_vdpa_get_device_id,
	.get_vendor_id	= ifcvf_vdpa_get_vendor_id,
	.get_vq_align	= ifcvf_vdpa_get_vq_align,
	.get_config	= ifcvf_vdpa_get_config,
	.set_config	= ifcvf_vdpa_set_config,
	.set_config_cb  = ifcvf_vdpa_set_config_cb,
};

static int ifcvf_request_irq(struct ifcvf_adapter *adapter)
{
	struct pci_dev *pdev = adapter->pdev;
	struct ifcvf_hw *vf = &adapter->vf;
	int vector, i, ret, irq;


	for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++) {
		snprintf(vf->vring[i].msix_name, 256, "ifcvf[%s]-%d\n",
			 pci_name(pdev), i);
		vector = i + IFCVF_MSI_QUEUE_OFF;
		irq = pci_irq_vector(pdev, vector);
		ret = devm_request_irq(&pdev->dev, irq,
				       ifcvf_intr_handler, 0,
				       vf->vring[i].msix_name,
				       &vf->vring[i]);
		if (ret) {
			IFCVF_ERR(pdev,
				  "Failed to request irq for vq %d\n", i);
			return ret;
		}
		vf->vring[i].irq = irq;
	}

	return 0;
}

static void ifcvf_free_irq_vectors(void *data)
{
	pci_free_irq_vectors(data);
}

static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
	struct device *dev = &pdev->dev;
	struct ifcvf_adapter *adapter;
	struct ifcvf_hw *vf;
	int ret;

	ret = pcim_enable_device(pdev);
	if (ret) {
		IFCVF_ERR(pdev, "Failed to enable device\n");
		return ret;
	}

	ret = pcim_iomap_regions(pdev, BIT(0) | BIT(2) | BIT(4),
				 IFCVF_DRIVER_NAME);
	if (ret) {
		IFCVF_ERR(pdev, "Failed to request MMIO region\n");
		return ret;
	}

	ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
	if (ret) {
		IFCVF_ERR(pdev, "No usable DMA confiugration\n");
		return ret;
	}

	ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
	if (ret) {
		IFCVF_ERR(pdev,
			  "No usable coherent DMA confiugration\n");
		return ret;
	}

	ret = pci_alloc_irq_vectors(pdev, IFCVF_MAX_INTR,
				    IFCVF_MAX_INTR, PCI_IRQ_MSIX);
	if (ret < 0) {
		IFCVF_ERR(pdev, "Failed to alloc irq vectors\n");
		return ret;
	}

	ret = devm_add_action_or_reset(dev, ifcvf_free_irq_vectors, pdev);
	if (ret) {
		IFCVF_ERR(pdev,
			  "Failed for adding devres for freeing irq vectors\n");
		return ret;
	}

	adapter = vdpa_alloc_device(struct ifcvf_adapter, vdpa,
				    dev, &ifc_vdpa_ops);
	if (adapter == NULL) {
		IFCVF_ERR(pdev, "Failed to allocate vDPA structure");
		return -ENOMEM;
	}

	pci_set_master(pdev);
	pci_set_drvdata(pdev, adapter);

	vf = &adapter->vf;
	vf->base = pcim_iomap_table(pdev);

	adapter->pdev = pdev;
	adapter->vdpa.dma_dev = &pdev->dev;

	ret = ifcvf_request_irq(adapter);
	if (ret) {
		IFCVF_ERR(pdev, "Failed to request MSI-X irq\n");
		goto err;
	}

	ret = ifcvf_init_hw(vf, pdev);
	if (ret) {
		IFCVF_ERR(pdev, "Failed to init IFCVF hw\n");
		goto err;
	}

	ret = vdpa_register_device(&adapter->vdpa);
	if (ret) {
		IFCVF_ERR(pdev, "Failed to register ifcvf to vdpa bus");
		goto err;
	}

	return 0;

err:
	put_device(&adapter->vdpa.dev);
	return ret;
}

static void ifcvf_remove(struct pci_dev *pdev)
{
	struct ifcvf_adapter *adapter = pci_get_drvdata(pdev);

	vdpa_unregister_device(&adapter->vdpa);
}

static struct pci_device_id ifcvf_pci_ids[] = {
	{ PCI_DEVICE_SUB(IFCVF_VENDOR_ID,
		IFCVF_DEVICE_ID,
		IFCVF_SUBSYS_VENDOR_ID,
		IFCVF_SUBSYS_DEVICE_ID) },
	{ 0 },
};
MODULE_DEVICE_TABLE(pci, ifcvf_pci_ids);

static struct pci_driver ifcvf_driver = {
	.name     = IFCVF_DRIVER_NAME,
	.id_table = ifcvf_pci_ids,
	.probe    = ifcvf_probe,
	.remove   = ifcvf_remove,
};

module_pci_driver(ifcvf_driver);

MODULE_LICENSE("GPL v2");
MODULE_VERSION(VERSION_STRING);
Commit	Line	Data
5a2414bc ZL	1	// SPDX-License-Identifier: GPL-2.0-only
	2	/*
	3	* Intel IFC VF NIC driver for virtio dataplane offloading
	4	*
	5	* Copyright (C) 2020 Intel Corporation.
	6	*
	7	* Author: Zhu Lingshan <lingshan.zhu@intel.com>
	8	*
	9	*/
	10
	11	#include <linux/interrupt.h>
	12	#include <linux/module.h>
	13	#include <linux/pci.h>
	14	#include <linux/sysfs.h>
	15	#include "ifcvf_base.h"
	16
	17	#define VERSION_STRING "0.1"
	18	#define DRIVER_AUTHOR "Intel Corporation"
	19	#define IFCVF_DRIVER_NAME "ifcvf"
	20
	21	static irqreturn_t ifcvf_intr_handler(int irq, void *arg)
	22	{
	23	struct vring_info *vring = arg;
	24
	25	if (vring->cb.callback)
	26	return vring->cb.callback(vring->cb.private);
	27
	28	return IRQ_HANDLED;
	29	}
	30
	31	static int ifcvf_start_datapath(void *private)
	32	{
	33	struct ifcvf_hw *vf = ifcvf_private_to_vf(private);
5a2414bc ZL	34	u8 status;
	35	int ret;
	36
5a2414bc ZL	37	vf->nr_vring = IFCVF_MAX_QUEUE_PAIRS * 2;
	38	ret = ifcvf_start_hw(vf);
	39	if (ret < 0) {
	40	status = ifcvf_get_status(vf);
	41	status \|= VIRTIO_CONFIG_S_FAILED;
	42	ifcvf_set_status(vf, status);
	43	}
	44
	45	return ret;
	46	}
	47
	48	static int ifcvf_stop_datapath(void *private)
	49	{
	50	struct ifcvf_hw *vf = ifcvf_private_to_vf(private);
	51	int i;
	52
	53	for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++)
	54	vf->vring[i].cb.callback = NULL;
	55
	56	ifcvf_stop_hw(vf);
	57
	58	return 0;
	59	}
	60
	61	static void ifcvf_reset_vring(struct ifcvf_adapter *adapter)
	62	{
	63	struct ifcvf_hw *vf = ifcvf_private_to_vf(adapter);
	64	int i;
	65
	66	for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++) {
	67	vf->vring[i].last_avail_idx = 0;
	68	vf->vring[i].desc = 0;
	69	vf->vring[i].avail = 0;
	70	vf->vring[i].used = 0;
	71	vf->vring[i].ready = 0;
	72	vf->vring[i].cb.callback = NULL;
	73	vf->vring[i].cb.private = NULL;
	74	}
	75
	76	ifcvf_reset(vf);
	77	}
	78
	79	static struct ifcvf_adapter vdpa_to_adapter(struct vdpa_device vdpa_dev)
	80	{
	81	return container_of(vdpa_dev, struct ifcvf_adapter, vdpa);
	82	}
	83
	84	static struct ifcvf_hw vdpa_to_vf(struct vdpa_device vdpa_dev)
	85	{
	86	struct ifcvf_adapter *adapter = vdpa_to_adapter(vdpa_dev);
	87
	88	return &adapter->vf;
	89	}
	90
	91	static u64 ifcvf_vdpa_get_features(struct vdpa_device *vdpa_dev)
	92	{
	93	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
	94	u64 features;
	95
	96	features = ifcvf_get_features(vf) & IFCVF_SUPPORTED_FEATURES;
	97
	98	return features;
	99	}
	100
101	static int ifcvf_vdpa_set_features(struct vdpa_device *vdpa_dev, u64 features)
102	{
103	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
104
105	vf->req_features = features;
106
107	return 0;
108	}
109
110	static u8 ifcvf_vdpa_get_status(struct vdpa_device *vdpa_dev)
111	{
112	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
113
114	return ifcvf_get_status(vf);
115	}
116
117	static void ifcvf_vdpa_set_status(struct vdpa_device *vdpa_dev, u8 status)
118	{
119	struct ifcvf_adapter *adapter;
120	struct ifcvf_hw *vf;
121
122	vf = vdpa_to_vf(vdpa_dev);
123	adapter = dev_get_drvdata(vdpa_dev->dev.parent);
124
125	if (status == 0) {
126	ifcvf_stop_datapath(adapter);
127	ifcvf_reset_vring(adapter);
128	return;
129	}
130
131	if (status & VIRTIO_CONFIG_S_DRIVER_OK) {
132	if (ifcvf_start_datapath(adapter) < 0)
133	IFCVF_ERR(adapter->pdev,
134	"Failed to set ifcvf vdpa status %u\n",
135	status);
136	}
137
138	ifcvf_set_status(vf, status);
139	}
140
141	static u16 ifcvf_vdpa_get_vq_num_max(struct vdpa_device *vdpa_dev)
142	{
143	return IFCVF_QUEUE_MAX;
144	}
145
146	static u64 ifcvf_vdpa_get_vq_state(struct vdpa_device *vdpa_dev, u16 qid)
147	{
148	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
149
150	return ifcvf_get_vq_state(vf, qid);
151	}
152
153	static int ifcvf_vdpa_set_vq_state(struct vdpa_device *vdpa_dev, u16 qid,
154	u64 num)
155	{
156	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
157
158	return ifcvf_set_vq_state(vf, qid, num);
159	}
160
161	static void ifcvf_vdpa_set_vq_cb(struct vdpa_device *vdpa_dev, u16 qid,
162	struct vdpa_callback *cb)
163	{
164	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
165
166	vf->vring[qid].cb = *cb;
167	}
168
169	static void ifcvf_vdpa_set_vq_ready(struct vdpa_device *vdpa_dev,
170	u16 qid, bool ready)
171	{
172	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
173
174	vf->vring[qid].ready = ready;
175	}
176
177	static bool ifcvf_vdpa_get_vq_ready(struct vdpa_device *vdpa_dev, u16 qid)
178	{
179	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
180
181	return vf->vring[qid].ready;
182	}
183
184	static void ifcvf_vdpa_set_vq_num(struct vdpa_device *vdpa_dev, u16 qid,
185	u32 num)
186	{
187	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
188
189	vf->vring[qid].size = num;
190	}
191
192	static int ifcvf_vdpa_set_vq_address(struct vdpa_device *vdpa_dev, u16 qid,
193	u64 desc_area, u64 driver_area,
194	u64 device_area)
195	{
196	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
197
198	vf->vring[qid].desc = desc_area;
199	vf->vring[qid].avail = driver_area;
200	vf->vring[qid].used = device_area;
201
202	return 0;
203	}
204
205	static void ifcvf_vdpa_kick_vq(struct vdpa_device *vdpa_dev, u16 qid)
206	{
207	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
208
209	ifcvf_notify_queue(vf, qid);
210	}
211
212	static u32 ifcvf_vdpa_get_generation(struct vdpa_device *vdpa_dev)
213	{
214	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
215
216	return ioread8(&vf->common_cfg->config_generation);
217	}
218
219	static u32 ifcvf_vdpa_get_device_id(struct vdpa_device *vdpa_dev)
220	{
221	return VIRTIO_ID_NET;
222	}
223
224	static u32 ifcvf_vdpa_get_vendor_id(struct vdpa_device *vdpa_dev)
225	{
226	return IFCVF_SUBSYS_VENDOR_ID;
227	}
228
425a5070	229	static u32 ifcvf_vdpa_get_vq_align(struct vdpa_device *vdpa_dev)
5a2414bc ZL	230	{
	231	return IFCVF_QUEUE_ALIGNMENT;
	232	}
	233
	234	static void ifcvf_vdpa_get_config(struct vdpa_device *vdpa_dev,
	235	unsigned int offset,
	236	void *buf, unsigned int len)
	237	{
	238	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
	239
	240	WARN_ON(offset + len > sizeof(struct virtio_net_config));
	241	ifcvf_read_net_config(vf, offset, buf, len);
	242	}
	243
	244	static void ifcvf_vdpa_set_config(struct vdpa_device *vdpa_dev,
	245	unsigned int offset, const void *buf,
	246	unsigned int len)
	247	{
	248	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
	249
	250	WARN_ON(offset + len > sizeof(struct virtio_net_config));
	251	ifcvf_write_net_config(vf, offset, buf, len);
	252	}
	253
	254	static void ifcvf_vdpa_set_config_cb(struct vdpa_device *vdpa_dev,
	255	struct vdpa_callback *cb)
	256	{
	257	/* We don't support config interrupt */
	258	}
	259
	260	/*
	261	* IFCVF currently does't have on-chip IOMMU, so not
	262	* implemented set_map()/dma_map()/dma_unmap()
	263	*/
	264	static const struct vdpa_config_ops ifc_vdpa_ops = {
	265	.get_features = ifcvf_vdpa_get_features,
	266	.set_features = ifcvf_vdpa_set_features,
	267	.get_status = ifcvf_vdpa_get_status,
	268	.set_status = ifcvf_vdpa_set_status,
	269	.get_vq_num_max = ifcvf_vdpa_get_vq_num_max,
	270	.get_vq_state = ifcvf_vdpa_get_vq_state,
	271	.set_vq_state = ifcvf_vdpa_set_vq_state,
	272	.set_vq_cb = ifcvf_vdpa_set_vq_cb,
	273	.set_vq_ready = ifcvf_vdpa_set_vq_ready,
	274	.get_vq_ready = ifcvf_vdpa_get_vq_ready,
	275	.set_vq_num = ifcvf_vdpa_set_vq_num,
	276	.set_vq_address = ifcvf_vdpa_set_vq_address,
	277	.kick_vq = ifcvf_vdpa_kick_vq,
	278	.get_generation = ifcvf_vdpa_get_generation,
	279	.get_device_id = ifcvf_vdpa_get_device_id,
	280	.get_vendor_id = ifcvf_vdpa_get_vendor_id,
	281	.get_vq_align = ifcvf_vdpa_get_vq_align,
	282	.get_config = ifcvf_vdpa_get_config,
	283	.set_config = ifcvf_vdpa_set_config,
	284	.set_config_cb = ifcvf_vdpa_set_config_cb,
	285	};
	286
	287	static int ifcvf_request_irq(struct ifcvf_adapter *adapter)
	288	{
	289	struct pci_dev *pdev = adapter->pdev;
	290	struct ifcvf_hw *vf = &adapter->vf;
	291	int vector, i, ret, irq;
	292
	293
294	for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++) {
295	snprintf(vf->vring[i].msix_name, 256, "ifcvf[%s]-%d\n",
296	pci_name(pdev), i);
297	vector = i + IFCVF_MSI_QUEUE_OFF;
298	irq = pci_irq_vector(pdev, vector);
299	ret = devm_request_irq(&pdev->dev, irq,
300	ifcvf_intr_handler, 0,
301	vf->vring[i].msix_name,
302	&vf->vring[i]);
303	if (ret) {
304	IFCVF_ERR(pdev,
305	"Failed to request irq for vq %d\n", i);
306	return ret;
307	}
308	vf->vring[i].irq = irq;
309	}
310
311	return 0;
312	}
313
314	static void ifcvf_free_irq_vectors(void *data)
315	{
316	pci_free_irq_vectors(data);
317	}
318
319	static int ifcvf_probe(struct pci_dev pdev, const struct pci_device_id id)
320	{
321	struct device *dev = &pdev->dev;
322	struct ifcvf_adapter *adapter;
323	struct ifcvf_hw *vf;
324	int ret;
325
326	ret = pcim_enable_device(pdev);
327	if (ret) {
328	IFCVF_ERR(pdev, "Failed to enable device\n");
329	return ret;
330	}
331
332	ret = pcim_iomap_regions(pdev, BIT(0) \| BIT(2) \| BIT(4),
333	IFCVF_DRIVER_NAME);
334	if (ret) {
335	IFCVF_ERR(pdev, "Failed to request MMIO region\n");
336	return ret;
337	}
338
339	ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
340	if (ret) {
341	IFCVF_ERR(pdev, "No usable DMA confiugration\n");
342	return ret;
343	}
344
345	ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
346	if (ret) {
347	IFCVF_ERR(pdev,
348	"No usable coherent DMA confiugration\n");
349	return ret;
350	}
351
352	ret = pci_alloc_irq_vectors(pdev, IFCVF_MAX_INTR,
353	IFCVF_MAX_INTR, PCI_IRQ_MSIX);
354	if (ret < 0) {
355	IFCVF_ERR(pdev, "Failed to alloc irq vectors\n");
356	return ret;
357	}
358
359	ret = devm_add_action_or_reset(dev, ifcvf_free_irq_vectors, pdev);
360	if (ret) {
361	IFCVF_ERR(pdev,
362	"Failed for adding devres for freeing irq vectors\n");
363	return ret;
364	}
365
366	adapter = vdpa_alloc_device(struct ifcvf_adapter, vdpa,
367	dev, &ifc_vdpa_ops);
368	if (adapter == NULL) {
369	IFCVF_ERR(pdev, "Failed to allocate vDPA structure");
370	return -ENOMEM;
371	}
372
373	pci_set_master(pdev);
374	pci_set_drvdata(pdev, adapter);
375
376	vf = &adapter->vf;
377	vf->base = pcim_iomap_table(pdev);
378
379	adapter->pdev = pdev;
380	adapter->vdpa.dma_dev = &pdev->dev;
381
382	ret = ifcvf_request_irq(adapter);
383	if (ret) {
384	IFCVF_ERR(pdev, "Failed to request MSI-X irq\n");
385	goto err;
386	}
387
388	ret = ifcvf_init_hw(vf, pdev);
389	if (ret) {
390	IFCVF_ERR(pdev, "Failed to init IFCVF hw\n");
391	goto err;
392	}
393
394	ret = vdpa_register_device(&adapter->vdpa);
395	if (ret) {
396	IFCVF_ERR(pdev, "Failed to register ifcvf to vdpa bus");
397	goto err;
398	}
399
400	return 0;
401
402	err:
403	put_device(&adapter->vdpa.dev);
404	return ret;
405	}
406
407	static void ifcvf_remove(struct pci_dev *pdev)
408	{
409	struct ifcvf_adapter *adapter = pci_get_drvdata(pdev);
410
411	vdpa_unregister_device(&adapter->vdpa);
412	}
413
414	static struct pci_device_id ifcvf_pci_ids[] = {
415	{ PCI_DEVICE_SUB(IFCVF_VENDOR_ID,
416	IFCVF_DEVICE_ID,
417	IFCVF_SUBSYS_VENDOR_ID,
418	IFCVF_SUBSYS_DEVICE_ID) },
419	{ 0 },
420	};
421	MODULE_DEVICE_TABLE(pci, ifcvf_pci_ids);
422
423	static struct pci_driver ifcvf_driver = {
424	.name = IFCVF_DRIVER_NAME,
425	.id_table = ifcvf_pci_ids,
426	.probe = ifcvf_probe,
427	.remove = ifcvf_remove,
428	};
429
430	module_pci_driver(ifcvf_driver);
431
432	MODULE_LICENSE("GPL v2");
433	MODULE_VERSION(VERSION_STRING);