[mirror_ubuntu-jammy-kernel.git] / drivers / scsi / fnic / vnic_dev.c

/*
 * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
 *
 * This program is free software; you may redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/if_ether.h>
#include "vnic_resource.h"
#include "vnic_devcmd.h"
#include "vnic_dev.h"
#include "vnic_stats.h"

struct vnic_res {
	void __iomem *vaddr;
	unsigned int count;
};

struct vnic_dev {
	void *priv;
	struct pci_dev *pdev;
	struct vnic_res res[RES_TYPE_MAX];
	enum vnic_dev_intr_mode intr_mode;
	struct vnic_devcmd __iomem *devcmd;
	struct vnic_devcmd_notify *notify;
	struct vnic_devcmd_notify notify_copy;
	dma_addr_t notify_pa;
	u32 *linkstatus;
	dma_addr_t linkstatus_pa;
	struct vnic_stats *stats;
	dma_addr_t stats_pa;
	struct vnic_devcmd_fw_info *fw_info;
	dma_addr_t fw_info_pa;
};

#define VNIC_MAX_RES_HDR_SIZE \
	(sizeof(struct vnic_resource_header) + \
	sizeof(struct vnic_resource) * RES_TYPE_MAX)
#define VNIC_RES_STRIDE	128

void *vnic_dev_priv(struct vnic_dev *vdev)
{
	return vdev->priv;
}

static int vnic_dev_discover_res(struct vnic_dev *vdev,
	struct vnic_dev_bar *bar)
{
	struct vnic_resource_header __iomem *rh;
	struct vnic_resource __iomem *r;
	u8 type;

	if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
		printk(KERN_ERR "vNIC BAR0 res hdr length error\n");
		return -EINVAL;
	}

	rh = bar->vaddr;
	if (!rh) {
		printk(KERN_ERR "vNIC BAR0 res hdr not mem-mapped\n");
		return -EINVAL;
	}

	if (ioread32(&rh->magic) != VNIC_RES_MAGIC ||
	    ioread32(&rh->version) != VNIC_RES_VERSION) {
		printk(KERN_ERR "vNIC BAR0 res magic/version error "
			"exp (%lx/%lx) curr (%x/%x)\n",
			VNIC_RES_MAGIC, VNIC_RES_VERSION,
			ioread32(&rh->magic), ioread32(&rh->version));
		return -EINVAL;
	}

	r = (struct vnic_resource __iomem *)(rh + 1);

	while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {

		u8 bar_num = ioread8(&r->bar);
		u32 bar_offset = ioread32(&r->bar_offset);
		u32 count = ioread32(&r->count);
		u32 len;

		r++;

		if (bar_num != 0)  /* only mapping in BAR0 resources */
			continue;

		switch (type) {
		case RES_TYPE_WQ:
		case RES_TYPE_RQ:
		case RES_TYPE_CQ:
		case RES_TYPE_INTR_CTRL:
			/* each count is stride bytes long */
			len = count * VNIC_RES_STRIDE;
			if (len + bar_offset > bar->len) {
				printk(KERN_ERR "vNIC BAR0 resource %d "
					"out-of-bounds, offset 0x%x + "
					"size 0x%x > bar len 0x%lx\n",
					type, bar_offset,
					len,
					bar->len);
				return -EINVAL;
			}
			break;
		case RES_TYPE_INTR_PBA_LEGACY:
		case RES_TYPE_DEVCMD:
			len = count;
			break;
		default:
			continue;
		}

		vdev->res[type].count = count;
		vdev->res[type].vaddr = (char __iomem *)bar->vaddr + bar_offset;
	}

	return 0;
}

unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
	enum vnic_res_type type)
{
	return vdev->res[type].count;
}

void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
	unsigned int index)
{
	if (!vdev->res[type].vaddr)
		return NULL;

	switch (type) {
	case RES_TYPE_WQ:
	case RES_TYPE_RQ:
	case RES_TYPE_CQ:
	case RES_TYPE_INTR_CTRL:
		return (char __iomem *)vdev->res[type].vaddr +
					index * VNIC_RES_STRIDE;
	default:
		return (char __iomem *)vdev->res[type].vaddr;
	}
}

unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
				     unsigned int desc_count,
				     unsigned int desc_size)
{
	/* The base address of the desc rings must be 512 byte aligned.
	 * Descriptor count is aligned to groups of 32 descriptors.  A
	 * count of 0 means the maximum 4096 descriptors.  Descriptor
	 * size is aligned to 16 bytes.
	 */

	unsigned int count_align = 32;
	unsigned int desc_align = 16;

	ring->base_align = 512;

	if (desc_count == 0)
		desc_count = 4096;

	ring->desc_count = ALIGN(desc_count, count_align);

	ring->desc_size = ALIGN(desc_size, desc_align);

	ring->size = ring->desc_count * ring->desc_size;
	ring->size_unaligned = ring->size + ring->base_align;

	return ring->size_unaligned;
}

void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
{
	memset(ring->descs, 0, ring->size);
}

int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
	unsigned int desc_count, unsigned int desc_size)
{
	vnic_dev_desc_ring_size(ring, desc_count, desc_size);

	ring->descs_unaligned = pci_alloc_consistent(vdev->pdev,
		ring->size_unaligned,
		&ring->base_addr_unaligned);

	if (!ring->descs_unaligned) {
		printk(KERN_ERR
		  "Failed to allocate ring (size=%d), aborting\n",
			(int)ring->size);
		return -ENOMEM;
	}

	ring->base_addr = ALIGN(ring->base_addr_unaligned,
		ring->base_align);
	ring->descs = (u8 *)ring->descs_unaligned +
		(ring->base_addr - ring->base_addr_unaligned);

	vnic_dev_clear_desc_ring(ring);

	ring->desc_avail = ring->desc_count - 1;

	return 0;
}

void vnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring)
{
	if (ring->descs) {
		pci_free_consistent(vdev->pdev,
			ring->size_unaligned,
			ring->descs_unaligned,
			ring->base_addr_unaligned);
		ring->descs = NULL;
	}
}

int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
	u64 *a0, u64 *a1, int wait)
{
	struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
	int delay;
	u32 status;
	int dev_cmd_err[] = {
		/* convert from fw's version of error.h to host's version */
		0,	/* ERR_SUCCESS */
		EINVAL,	/* ERR_EINVAL */
		EFAULT,	/* ERR_EFAULT */
		EPERM,	/* ERR_EPERM */
		EBUSY,  /* ERR_EBUSY */
	};
	int err;

	status = ioread32(&devcmd->status);
	if (status & STAT_BUSY) {
		printk(KERN_ERR "Busy devcmd %d\n", _CMD_N(cmd));
		return -EBUSY;
	}

	if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
		writeq(*a0, &devcmd->args[0]);
		writeq(*a1, &devcmd->args[1]);
		wmb();
	}

	iowrite32(cmd, &devcmd->cmd);

	if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
			return 0;

	for (delay = 0; delay < wait; delay++) {

		udelay(100);

		status = ioread32(&devcmd->status);
		if (!(status & STAT_BUSY)) {

			if (status & STAT_ERROR) {
				err = dev_cmd_err[(int)readq(&devcmd->args[0])];
				printk(KERN_ERR "Error %d devcmd %d\n",
					err, _CMD_N(cmd));
				return -err;
			}

			if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
				rmb();
				*a0 = readq(&devcmd->args[0]);
				*a1 = readq(&devcmd->args[1]);
			}

			return 0;
		}
	}

	printk(KERN_ERR "Timedout devcmd %d\n", _CMD_N(cmd));
	return -ETIMEDOUT;
}

int vnic_dev_fw_info(struct vnic_dev *vdev,
	struct vnic_devcmd_fw_info **fw_info)
{
	u64 a0, a1 = 0;
	int wait = 1000;
	int err = 0;

	if (!vdev->fw_info) {
		vdev->fw_info = pci_alloc_consistent(vdev->pdev,
			sizeof(struct vnic_devcmd_fw_info),
			&vdev->fw_info_pa);
		if (!vdev->fw_info)
			return -ENOMEM;

		a0 = vdev->fw_info_pa;

		/* only get fw_info once and cache it */
		err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait);
	}

	*fw_info = vdev->fw_info;

	return err;
}

int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
	void *value)
{
	u64 a0, a1;
	int wait = 1000;
	int err;

	a0 = offset;
	a1 = size;

	err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);

	switch (size) {
	case 1:
		*(u8 *)value = (u8)a0;
		break;
	case 2:
		*(u16 *)value = (u16)a0;
		break;
	case 4:
		*(u32 *)value = (u32)a0;
		break;
	case 8:
		*(u64 *)value = a0;
		break;
	default:
		BUG();
		break;
	}

	return err;
}

int vnic_dev_stats_clear(struct vnic_dev *vdev)
{
	u64 a0 = 0, a1 = 0;
	int wait = 1000;
	return vnic_dev_cmd(vdev, CMD_STATS_CLEAR, &a0, &a1, wait);
}

int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
{
	u64 a0, a1;
	int wait = 1000;

	if (!vdev->stats) {
		vdev->stats = pci_alloc_consistent(vdev->pdev,
			sizeof(struct vnic_stats), &vdev->stats_pa);
		if (!vdev->stats)
			return -ENOMEM;
	}

	*stats = vdev->stats;
	a0 = vdev->stats_pa;
	a1 = sizeof(struct vnic_stats);

	return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
}

int vnic_dev_close(struct vnic_dev *vdev)
{
	u64 a0 = 0, a1 = 0;
	int wait = 1000;
	return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
}

int vnic_dev_enable(struct vnic_dev *vdev)
{
	u64 a0 = 0, a1 = 0;
	int wait = 1000;
	return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
}

int vnic_dev_disable(struct vnic_dev *vdev)
{
	u64 a0 = 0, a1 = 0;
	int wait = 1000;
	return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
}

int vnic_dev_open(struct vnic_dev *vdev, int arg)
{
	u64 a0 = (u32)arg, a1 = 0;
	int wait = 1000;
	return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
}

int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
{
	u64 a0 = 0, a1 = 0;
	int wait = 1000;
	int err;

	*done = 0;

	err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
	if (err)
		return err;

	*done = (a0 == 0);

	return 0;
}

int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
{
	u64 a0 = (u32)arg, a1 = 0;
	int wait = 1000;
	return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait);
}

int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done)
{
	u64 a0 = 0, a1 = 0;
	int wait = 1000;
	int err;

	*done = 0;

	err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
	if (err)
		return err;

	*done = (a0 == 0);

	return 0;
}

int vnic_dev_hang_notify(struct vnic_dev *vdev)
{
	u64 a0, a1;
	int wait = 1000;
	return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait);
}

int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
{
	u64 a0, a1;
	int wait = 1000;
	int err, i;

	for (i = 0; i < ETH_ALEN; i++)
		mac_addr[i] = 0;

	err = vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
	if (err)
		return err;

	for (i = 0; i < ETH_ALEN; i++)
		mac_addr[i] = ((u8 *)&a0)[i];

	return 0;
}

void vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
	int broadcast, int promisc, int allmulti)
{
	u64 a0, a1 = 0;
	int wait = 1000;
	int err;

	a0 = (directed ? CMD_PFILTER_DIRECTED : 0) |
	     (multicast ? CMD_PFILTER_MULTICAST : 0) |
	     (broadcast ? CMD_PFILTER_BROADCAST : 0) |
	     (promisc ? CMD_PFILTER_PROMISCUOUS : 0) |
	     (allmulti ? CMD_PFILTER_ALL_MULTICAST : 0);

	err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait);
	if (err)
		printk(KERN_ERR "Can't set packet filter\n");
}

void vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
{
	u64 a0 = 0, a1 = 0;
	int wait = 1000;
	int err;
	int i;

	for (i = 0; i < ETH_ALEN; i++)
		((u8 *)&a0)[i] = addr[i];

	err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
	if (err)
		printk(KERN_ERR
			"Can't add addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n",
			addr[0], addr[1], addr[2], addr[3], addr[4], addr[5],
			err);
}

void vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr)
{
	u64 a0 = 0, a1 = 0;
	int wait = 1000;
	int err;
	int i;

	for (i = 0; i < ETH_ALEN; i++)
		((u8 *)&a0)[i] = addr[i];

	err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait);
	if (err)
		printk(KERN_ERR
			"Can't del addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n",
			addr[0], addr[1], addr[2], addr[3], addr[4], addr[5],
			err);
}

int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
{
	u64 a0, a1;
	int wait = 1000;

	if (!vdev->notify) {
		vdev->notify = pci_alloc_consistent(vdev->pdev,
			sizeof(struct vnic_devcmd_notify),
			&vdev->notify_pa);
		if (!vdev->notify)
			return -ENOMEM;
	}

	a0 = vdev->notify_pa;
	a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
	a1 += sizeof(struct vnic_devcmd_notify);

	return vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
}

void vnic_dev_notify_unset(struct vnic_dev *vdev)
{
	u64 a0, a1;
	int wait = 1000;

	a0 = 0;  /* paddr = 0 to unset notify buffer */
	a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
	a1 += sizeof(struct vnic_devcmd_notify);

	vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
}

static int vnic_dev_notify_ready(struct vnic_dev *vdev)
{
	u32 *words;
	unsigned int nwords = sizeof(struct vnic_devcmd_notify) / 4;
	unsigned int i;
	u32 csum;

	if (!vdev->notify)
		return 0;

	do {
		csum = 0;
		memcpy(&vdev->notify_copy, vdev->notify,
			sizeof(struct vnic_devcmd_notify));
		words = (u32 *)&vdev->notify_copy;
		for (i = 1; i < nwords; i++)
			csum += words[i];
	} while (csum != words[0]);

	return 1;
}

int vnic_dev_init(struct vnic_dev *vdev, int arg)
{
	u64 a0 = (u32)arg, a1 = 0;
	int wait = 1000;
	return vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
}

int vnic_dev_link_status(struct vnic_dev *vdev)
{
	if (vdev->linkstatus)
		return *vdev->linkstatus;

	if (!vnic_dev_notify_ready(vdev))
		return 0;

	return vdev->notify_copy.link_state;
}

u32 vnic_dev_port_speed(struct vnic_dev *vdev)
{
	if (!vnic_dev_notify_ready(vdev))
		return 0;

	return vdev->notify_copy.port_speed;
}

u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
{
	if (!vnic_dev_notify_ready(vdev))
		return 0;

	return vdev->notify_copy.msglvl;
}

u32 vnic_dev_mtu(struct vnic_dev *vdev)
{
	if (!vnic_dev_notify_ready(vdev))
		return 0;

	return vdev->notify_copy.mtu;
}

u32 vnic_dev_link_down_cnt(struct vnic_dev *vdev)
{
	if (!vnic_dev_notify_ready(vdev))
		return 0;

	return vdev->notify_copy.link_down_cnt;
}

void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
	enum vnic_dev_intr_mode intr_mode)
{
	vdev->intr_mode = intr_mode;
}

enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
	struct vnic_dev *vdev)
{
	return vdev->intr_mode;
}

void vnic_dev_unregister(struct vnic_dev *vdev)
{
	if (vdev) {
		if (vdev->notify)
			pci_free_consistent(vdev->pdev,
				sizeof(struct vnic_devcmd_notify),
				vdev->notify,
				vdev->notify_pa);
		if (vdev->linkstatus)
			pci_free_consistent(vdev->pdev,
				sizeof(u32),
				vdev->linkstatus,
				vdev->linkstatus_pa);
		if (vdev->stats)
			pci_free_consistent(vdev->pdev,
				sizeof(struct vnic_dev),
				vdev->stats, vdev->stats_pa);
		if (vdev->fw_info)
			pci_free_consistent(vdev->pdev,
				sizeof(struct vnic_devcmd_fw_info),
				vdev->fw_info, vdev->fw_info_pa);
		kfree(vdev);
	}
}

struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
	void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar)
{
	if (!vdev) {
		vdev = kzalloc(sizeof(struct vnic_dev), GFP_KERNEL);
		if (!vdev)
			return NULL;
	}

	vdev->priv = priv;
	vdev->pdev = pdev;

	if (vnic_dev_discover_res(vdev, bar))
		goto err_out;

	vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);
	if (!vdev->devcmd)
		goto err_out;

	return vdev;

err_out:
	vnic_dev_unregister(vdev);
	return NULL;
}
Commit	Line	Data
5df6d737 AJ	1	/*
	2	* Copyright 2008 Cisco Systems, Inc. All rights reserved.
	3	* Copyright 2007 Nuova Systems, Inc. All rights reserved.
	4	*
	5	* This program is free software; you may redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; version 2 of the License.
	8	*
	9	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	10	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	11	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	12	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	13	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	14	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	15	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	16	* SOFTWARE.
	17	*/
	18
	19	#include <linux/kernel.h>
	20	#include <linux/errno.h>
	21	#include <linux/types.h>
	22	#include <linux/pci.h>
	23	#include <linux/delay.h>
	24	#include <linux/if_ether.h>
	25	#include "vnic_resource.h"
	26	#include "vnic_devcmd.h"
	27	#include "vnic_dev.h"
	28	#include "vnic_stats.h"
	29
	30	struct vnic_res {
	31	void __iomem *vaddr;
	32	unsigned int count;
	33	};
	34
	35	struct vnic_dev {
	36	void *priv;
	37	struct pci_dev *pdev;
	38	struct vnic_res res[RES_TYPE_MAX];
	39	enum vnic_dev_intr_mode intr_mode;
	40	struct vnic_devcmd __iomem *devcmd;
	41	struct vnic_devcmd_notify *notify;
	42	struct vnic_devcmd_notify notify_copy;
	43	dma_addr_t notify_pa;
	44	u32 *linkstatus;
	45	dma_addr_t linkstatus_pa;
	46	struct vnic_stats *stats;
	47	dma_addr_t stats_pa;
	48	struct vnic_devcmd_fw_info *fw_info;
	49	dma_addr_t fw_info_pa;
	50	};
	51
	52	#define VNIC_MAX_RES_HDR_SIZE \
	53	(sizeof(struct vnic_resource_header) + \
	54	sizeof(struct vnic_resource) * RES_TYPE_MAX)
	55	#define VNIC_RES_STRIDE 128
	56
	57	void vnic_dev_priv(struct vnic_dev vdev)
	58	{
	59	return vdev->priv;
	60	}
	61
	62	static int vnic_dev_discover_res(struct vnic_dev *vdev,
	63	struct vnic_dev_bar *bar)
	64	{
65	struct vnic_resource_header __iomem *rh;
66	struct vnic_resource __iomem *r;
67	u8 type;
68
69	if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
70	printk(KERN_ERR "vNIC BAR0 res hdr length error\n");
71	return -EINVAL;
72	}
73
74	rh = bar->vaddr;
75	if (!rh) {
76	printk(KERN_ERR "vNIC BAR0 res hdr not mem-mapped\n");
77	return -EINVAL;
78	}
79
80	if (ioread32(&rh->magic) != VNIC_RES_MAGIC \|\|
81	ioread32(&rh->version) != VNIC_RES_VERSION) {
82	printk(KERN_ERR "vNIC BAR0 res magic/version error "
83	"exp (%lx/%lx) curr (%x/%x)\n",
84	VNIC_RES_MAGIC, VNIC_RES_VERSION,
85	ioread32(&rh->magic), ioread32(&rh->version));
86	return -EINVAL;
87	}
88
89	r = (struct vnic_resource __iomem *)(rh + 1);
90
91	while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
92
93	u8 bar_num = ioread8(&r->bar);
94	u32 bar_offset = ioread32(&r->bar_offset);
95	u32 count = ioread32(&r->count);
96	u32 len;
97
98	r++;
99
100	if (bar_num != 0) /* only mapping in BAR0 resources */
101	continue;
102
103	switch (type) {
104	case RES_TYPE_WQ:
105	case RES_TYPE_RQ:
106	case RES_TYPE_CQ:
107	case RES_TYPE_INTR_CTRL:
108	/* each count is stride bytes long */
109	len = count * VNIC_RES_STRIDE;
110	if (len + bar_offset > bar->len) {
111	printk(KERN_ERR "vNIC BAR0 resource %d "
112	"out-of-bounds, offset 0x%x + "
113	"size 0x%x > bar len 0x%lx\n",
114	type, bar_offset,
115	len,
116	bar->len);
117	return -EINVAL;
118	}
119	break;
120	case RES_TYPE_INTR_PBA_LEGACY:
121	case RES_TYPE_DEVCMD:
122	len = count;
123	break;
124	default:
125	continue;
126	}
127
128	vdev->res[type].count = count;
129	vdev->res[type].vaddr = (char __iomem *)bar->vaddr + bar_offset;
130	}
131
132	return 0;
133	}
134
135	unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
136	enum vnic_res_type type)
137	{
138	return vdev->res[type].count;
139	}
140
141	void __iomem vnic_dev_get_res(struct vnic_dev vdev, enum vnic_res_type type,
142	unsigned int index)
143	{
144	if (!vdev->res[type].vaddr)
145	return NULL;
146
147	switch (type) {
148	case RES_TYPE_WQ:
149	case RES_TYPE_RQ:
150	case RES_TYPE_CQ:
151	case RES_TYPE_INTR_CTRL:
152	return (char __iomem *)vdev->res[type].vaddr +
153	index * VNIC_RES_STRIDE;
154	default:
155	return (char __iomem *)vdev->res[type].vaddr;
156	}
157	}
158
159	unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
160	unsigned int desc_count,
161	unsigned int desc_size)
162	{
163	/* The base address of the desc rings must be 512 byte aligned.
164	* Descriptor count is aligned to groups of 32 descriptors. A
165	* count of 0 means the maximum 4096 descriptors. Descriptor
166	* size is aligned to 16 bytes.
167	*/
168
169	unsigned int count_align = 32;
170	unsigned int desc_align = 16;
171
172	ring->base_align = 512;
173
174	if (desc_count == 0)
175	desc_count = 4096;
176
177	ring->desc_count = ALIGN(desc_count, count_align);
178
179	ring->desc_size = ALIGN(desc_size, desc_align);
180
181	ring->size = ring->desc_count * ring->desc_size;
182	ring->size_unaligned = ring->size + ring->base_align;
183
184	return ring->size_unaligned;
185	}
186
187	void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
188	{
189	memset(ring->descs, 0, ring->size);
190	}
191
192	int vnic_dev_alloc_desc_ring(struct vnic_dev vdev, struct vnic_dev_ring ring,
193	unsigned int desc_count, unsigned int desc_size)
194	{
195	vnic_dev_desc_ring_size(ring, desc_count, desc_size);
196
197	ring->descs_unaligned = pci_alloc_consistent(vdev->pdev,
198	ring->size_unaligned,
199	&ring->base_addr_unaligned);
200
201	if (!ring->descs_unaligned) {
202	printk(KERN_ERR
203	"Failed to allocate ring (size=%d), aborting\n",
204	(int)ring->size);
205	return -ENOMEM;
206	}
207
208	ring->base_addr = ALIGN(ring->base_addr_unaligned,
209	ring->base_align);
210	ring->descs = (u8 *)ring->descs_unaligned +
211	(ring->base_addr - ring->base_addr_unaligned);
212
213	vnic_dev_clear_desc_ring(ring);
214
215	ring->desc_avail = ring->desc_count - 1;
216
217	return 0;
218	}
219
220	void vnic_dev_free_desc_ring(struct vnic_dev vdev, struct vnic_dev_ring ring)
221	{
222	if (ring->descs) {
223	pci_free_consistent(vdev->pdev,
224	ring->size_unaligned,
225	ring->descs_unaligned,
226	ring->base_addr_unaligned);
227	ring->descs = NULL;
228	}
229	}
230
231	int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
232	u64 a0, u64 a1, int wait)
233	{
234	struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
235	int delay;
236	u32 status;
237	int dev_cmd_err[] = {
238	/* convert from fw's version of error.h to host's version */
239	0, /* ERR_SUCCESS */
240	EINVAL, /* ERR_EINVAL */
241	EFAULT, /* ERR_EFAULT */
242	EPERM, /* ERR_EPERM */
243	EBUSY, /* ERR_EBUSY */
244	};
245	int err;
246
247	status = ioread32(&devcmd->status);
248	if (status & STAT_BUSY) {
249	printk(KERN_ERR "Busy devcmd %d\n", _CMD_N(cmd));
250	return -EBUSY;
251	}
252
253	if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
254	writeq(*a0, &devcmd->args[0]);
255	writeq(*a1, &devcmd->args[1]);
256	wmb();
257	}
258
259	iowrite32(cmd, &devcmd->cmd);
260
261	if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
262	return 0;
263
264	for (delay = 0; delay < wait; delay++) {
265
266	udelay(100);
267
268	status = ioread32(&devcmd->status);
269	if (!(status & STAT_BUSY)) {
270
271	if (status & STAT_ERROR) {
272	err = dev_cmd_err[(int)readq(&devcmd->args[0])];
273	printk(KERN_ERR "Error %d devcmd %d\n",
274	err, _CMD_N(cmd));
275	return -err;
276	}
277
278	if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
279	rmb();
280	*a0 = readq(&devcmd->args[0]);
281	*a1 = readq(&devcmd->args[1]);
282	}
283
284	return 0;
285	}
286	}
287
288	printk(KERN_ERR "Timedout devcmd %d\n", _CMD_N(cmd));
289	return -ETIMEDOUT;
290	}
291
292	int vnic_dev_fw_info(struct vnic_dev *vdev,
293	struct vnic_devcmd_fw_info **fw_info)
294	{
295	u64 a0, a1 = 0;
296	int wait = 1000;
297	int err = 0;
298
299	if (!vdev->fw_info) {
300	vdev->fw_info = pci_alloc_consistent(vdev->pdev,
301	sizeof(struct vnic_devcmd_fw_info),
302	&vdev->fw_info_pa);
303	if (!vdev->fw_info)
304	return -ENOMEM;
305
306	a0 = vdev->fw_info_pa;
307
308	/* only get fw_info once and cache it */
309	err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait);
310	}
311
312	*fw_info = vdev->fw_info;
313
314	return err;
315	}
316
317	int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
318	void *value)
319	{
320	u64 a0, a1;
321	int wait = 1000;
322	int err;
323
324	a0 = offset;
325	a1 = size;
326
327	err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);
328
329	switch (size) {
330	case 1:
331	(u8 )value = (u8)a0;
332	break;
333	case 2:
334	(u16 )value = (u16)a0;
335	break;
336	case 4:
337	(u32 )value = (u32)a0;
338	break;
339	case 8:
340	(u64 )value = a0;
341	break;
342	default:
343	BUG();
344	break;
345	}
346
347	return err;
348	}
349
350	int vnic_dev_stats_clear(struct vnic_dev *vdev)
351	{
352	u64 a0 = 0, a1 = 0;
353	int wait = 1000;
354	return vnic_dev_cmd(vdev, CMD_STATS_CLEAR, &a0, &a1, wait);
355	}
356
357	int vnic_dev_stats_dump(struct vnic_dev vdev, struct vnic_stats *stats)
358	{
359	u64 a0, a1;
360	int wait = 1000;
361
362	if (!vdev->stats) {
363	vdev->stats = pci_alloc_consistent(vdev->pdev,
364	sizeof(struct vnic_stats), &vdev->stats_pa);
365	if (!vdev->stats)
366	return -ENOMEM;
367	}
368
369	*stats = vdev->stats;
370	a0 = vdev->stats_pa;
371	a1 = sizeof(struct vnic_stats);
372
373	return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
374	}
375
376	int vnic_dev_close(struct vnic_dev *vdev)
377	{
378	u64 a0 = 0, a1 = 0;
379	int wait = 1000;
380	return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
381	}
382
383	int vnic_dev_enable(struct vnic_dev *vdev)
384	{
385	u64 a0 = 0, a1 = 0;
386	int wait = 1000;
387	return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
388	}
389
390	int vnic_dev_disable(struct vnic_dev *vdev)
391	{
392	u64 a0 = 0, a1 = 0;
393	int wait = 1000;
394	return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
395	}
396
397	int vnic_dev_open(struct vnic_dev *vdev, int arg)
398	{
399	u64 a0 = (u32)arg, a1 = 0;
400	int wait = 1000;
401	return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
402	}
403
404	int vnic_dev_open_done(struct vnic_dev vdev, int done)
405	{
406	u64 a0 = 0, a1 = 0;
407	int wait = 1000;
408	int err;
409
410	*done = 0;
411
412	err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
413	if (err)
414	return err;
415
416	*done = (a0 == 0);
417
418	return 0;
419	}
420
421	int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
422	{
423	u64 a0 = (u32)arg, a1 = 0;
424	int wait = 1000;
425	return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait);
426	}
427
428	int vnic_dev_soft_reset_done(struct vnic_dev vdev, int done)
429	{
430	u64 a0 = 0, a1 = 0;
431	int wait = 1000;
432	int err;
433
434	*done = 0;
435
436	err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
437	if (err)
438	return err;
439
440	*done = (a0 == 0);
441
442	return 0;
443	}
444
445	int vnic_dev_hang_notify(struct vnic_dev *vdev)
446	{
447	u64 a0, a1;
448	int wait = 1000;
449	return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait);
450	}
451
452	int vnic_dev_mac_addr(struct vnic_dev vdev, u8 mac_addr)
453	{
454	u64 a0, a1;
455	int wait = 1000;
456	int err, i;
457
458	for (i = 0; i < ETH_ALEN; i++)
459	mac_addr[i] = 0;
460
461	err = vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
462	if (err)
463	return err;
464
465	for (i = 0; i < ETH_ALEN; i++)
466	mac_addr[i] = ((u8 *)&a0)[i];
467
468	return 0;
469	}
470
471	void vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
472	int broadcast, int promisc, int allmulti)
473	{
474	u64 a0, a1 = 0;
475	int wait = 1000;
476	int err;
477
478	a0 = (directed ? CMD_PFILTER_DIRECTED : 0) \|
479	(multicast ? CMD_PFILTER_MULTICAST : 0) \|
480	(broadcast ? CMD_PFILTER_BROADCAST : 0) \|
481	(promisc ? CMD_PFILTER_PROMISCUOUS : 0) \|
482	(allmulti ? CMD_PFILTER_ALL_MULTICAST : 0);
483
484	err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait);
485	if (err)
486	printk(KERN_ERR "Can't set packet filter\n");
487	}
488
489	void vnic_dev_add_addr(struct vnic_dev vdev, u8 addr)
490	{
491	u64 a0 = 0, a1 = 0;
492	int wait = 1000;
493	int err;
494	int i;
495
496	for (i = 0; i < ETH_ALEN; i++)
497	((u8 *)&a0)[i] = addr[i];
498
499	err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
500	if (err)
501	printk(KERN_ERR
502	"Can't add addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n",
503	addr[0], addr[1], addr[2], addr[3], addr[4], addr[5],
504	err);
505	}
506
507	void vnic_dev_del_addr(struct vnic_dev vdev, u8 addr)
508	{
509	u64 a0 = 0, a1 = 0;
510	int wait = 1000;
511	int err;
512	int i;
513
514	for (i = 0; i < ETH_ALEN; i++)
515	((u8 *)&a0)[i] = addr[i];
516
517	err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait);
518	if (err)
519	printk(KERN_ERR
520	"Can't del addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n",
521	addr[0], addr[1], addr[2], addr[3], addr[4], addr[5],
522	err);
523	}
524
525	int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
526	{
527	u64 a0, a1;
528	int wait = 1000;
529
530	if (!vdev->notify) {
531	vdev->notify = pci_alloc_consistent(vdev->pdev,
532	sizeof(struct vnic_devcmd_notify),
533	&vdev->notify_pa);
534	if (!vdev->notify)
535	return -ENOMEM;
536	}
537
538	a0 = vdev->notify_pa;
539	a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
540	a1 += sizeof(struct vnic_devcmd_notify);
541
542	return vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
543	}
544
545	void vnic_dev_notify_unset(struct vnic_dev *vdev)
546	{
547	u64 a0, a1;
548	int wait = 1000;
549
550	a0 = 0; /* paddr = 0 to unset notify buffer */
551	a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
552	a1 += sizeof(struct vnic_devcmd_notify);
553
554	vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
555	}
556
557	static int vnic_dev_notify_ready(struct vnic_dev *vdev)
558	{
559	u32 *words;
560	unsigned int nwords = sizeof(struct vnic_devcmd_notify) / 4;
561	unsigned int i;
562	u32 csum;
563
564	if (!vdev->notify)
565	return 0;
566
567	do {
568	csum = 0;
569	memcpy(&vdev->notify_copy, vdev->notify,
570	sizeof(struct vnic_devcmd_notify));
571	words = (u32 *)&vdev->notify_copy;
572	for (i = 1; i < nwords; i++)
573	csum += words[i];
574	} while (csum != words[0]);
575
576	return 1;
577	}
578
579	int vnic_dev_init(struct vnic_dev *vdev, int arg)
580	{
581	u64 a0 = (u32)arg, a1 = 0;
582	int wait = 1000;
583	return vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
584	}
585
586	int vnic_dev_link_status(struct vnic_dev *vdev)
587	{
588	if (vdev->linkstatus)
589	return *vdev->linkstatus;
590
591	if (!vnic_dev_notify_ready(vdev))
592	return 0;
593
594	return vdev->notify_copy.link_state;
595	}
596
597	u32 vnic_dev_port_speed(struct vnic_dev *vdev)
598	{
599	if (!vnic_dev_notify_ready(vdev))
600	return 0;
601
602	return vdev->notify_copy.port_speed;
603	}
604
605	u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
606	{
607	if (!vnic_dev_notify_ready(vdev))
608	return 0;
609
610	return vdev->notify_copy.msglvl;
611	}
612
613	u32 vnic_dev_mtu(struct vnic_dev *vdev)
614	{
615	if (!vnic_dev_notify_ready(vdev))
616	return 0;
617
618	return vdev->notify_copy.mtu;
619	}
620
621	u32 vnic_dev_link_down_cnt(struct vnic_dev *vdev)
622	{
623	if (!vnic_dev_notify_ready(vdev))
624	return 0;
625
626	return vdev->notify_copy.link_down_cnt;
627	}
628
629	void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
630	enum vnic_dev_intr_mode intr_mode)
631	{
632	vdev->intr_mode = intr_mode;
633	}
634
635	enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
636	struct vnic_dev *vdev)
637	{
638	return vdev->intr_mode;
639	}
640
641	void vnic_dev_unregister(struct vnic_dev *vdev)
642	{
643	if (vdev) {
644	if (vdev->notify)
645	pci_free_consistent(vdev->pdev,
646	sizeof(struct vnic_devcmd_notify),
647	vdev->notify,
648	vdev->notify_pa);
649	if (vdev->linkstatus)
650	pci_free_consistent(vdev->pdev,
651	sizeof(u32),
652	vdev->linkstatus,
653	vdev->linkstatus_pa);
654	if (vdev->stats)
655	pci_free_consistent(vdev->pdev,
656	sizeof(struct vnic_dev),
657	vdev->stats, vdev->stats_pa);
658	if (vdev->fw_info)
659	pci_free_consistent(vdev->pdev,
660	sizeof(struct vnic_devcmd_fw_info),
661	vdev->fw_info, vdev->fw_info_pa);
662	kfree(vdev);
663	}
664	}
665
666	struct vnic_dev vnic_dev_register(struct vnic_dev vdev,
667	void priv, struct pci_dev pdev, struct vnic_dev_bar *bar)
668	{
669	if (!vdev) {
670	vdev = kzalloc(sizeof(struct vnic_dev), GFP_KERNEL);
671	if (!vdev)
672	return NULL;
673	}
674
675	vdev->priv = priv;
676	vdev->pdev = pdev;
677
678	if (vnic_dev_discover_res(vdev, bar))
679	goto err_out;
680
681	vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);
682	if (!vdev->devcmd)
683	goto err_out;
684
685	return vdev;
686
687	err_out:
688	vnic_dev_unregister(vdev);
689	return NULL;
690	}