Linux-libre 4.3.2-gnu

1 files changed, 1125 insertions, 0 deletions

diff --git a/drivers/net/fjes/fjes_hw.c b/drivers/net/fjes/fjes_hw.c
new file mode 100644
index 000000000..2d3848c9d
--- /dev/null
+++ b/drivers/net/fjes/fjes_hw.c
@@ -0,0 +1,1125 @@
+/*
+ *  FUJITSU Extended Socket Network Device driver
+ *  Copyright (c) 2015 FUJITSU LIMITED
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ *
+ */
+
+#include "fjes_hw.h"
+#include "fjes.h"
+
+static void fjes_hw_update_zone_task(struct work_struct *);
+static void fjes_hw_epstop_task(struct work_struct *);
+
+/* supported MTU list */
+const u32 fjes_support_mtu[] = {
+	FJES_MTU_DEFINE(8 * 1024),
+	FJES_MTU_DEFINE(16 * 1024),
+	FJES_MTU_DEFINE(32 * 1024),
+	FJES_MTU_DEFINE(64 * 1024),
+	0
+};
+
+u32 fjes_hw_rd32(struct fjes_hw *hw, u32 reg)
+{
+	u8 *base = hw->base;
+	u32 value = 0;
+
+	value = readl(&base[reg]);
+
+	return value;
+}
+
+static u8 *fjes_hw_iomap(struct fjes_hw *hw)
+{
+	u8 *base;
+
+	if (!request_mem_region(hw->hw_res.start, hw->hw_res.size,
+				fjes_driver_name)) {
+		pr_err("request_mem_region failed\n");
+		return NULL;
+	}
+
+	base = (u8 *)ioremap_nocache(hw->hw_res.start, hw->hw_res.size);
+
+	return base;
+}
+
+static void fjes_hw_iounmap(struct fjes_hw *hw)
+{
+	iounmap(hw->base);
+	release_mem_region(hw->hw_res.start, hw->hw_res.size);
+}
+
+int fjes_hw_reset(struct fjes_hw *hw)
+{
+	union REG_DCTL dctl;
+	int timeout;
+
+	dctl.reg = 0;
+	dctl.bits.reset = 1;
+	wr32(XSCT_DCTL, dctl.reg);
+
+	timeout = FJES_DEVICE_RESET_TIMEOUT * 1000;
+	dctl.reg = rd32(XSCT_DCTL);
+	while ((dctl.bits.reset == 1) && (timeout > 0)) {
+		msleep(1000);
+		dctl.reg = rd32(XSCT_DCTL);
+		timeout -= 1000;
+	}
+
+	return timeout > 0 ? 0 : -EIO;
+}
+
+static int fjes_hw_get_max_epid(struct fjes_hw *hw)
+{
+	union REG_MAX_EP info;
+
+	info.reg = rd32(XSCT_MAX_EP);
+
+	return info.bits.maxep;
+}
+
+static int fjes_hw_get_my_epid(struct fjes_hw *hw)
+{
+	union REG_OWNER_EPID info;
+
+	info.reg = rd32(XSCT_OWNER_EPID);
+
+	return info.bits.epid;
+}
+
+static int fjes_hw_alloc_shared_status_region(struct fjes_hw *hw)
+{
+	size_t size;
+
+	size = sizeof(struct fjes_device_shared_info) +
+	    (sizeof(u8) * hw->max_epid);
+	hw->hw_info.share = kzalloc(size, GFP_KERNEL);
+	if (!hw->hw_info.share)
+		return -ENOMEM;
+
+	hw->hw_info.share->epnum = hw->max_epid;
+
+	return 0;
+}
+
+static void fjes_hw_free_shared_status_region(struct fjes_hw *hw)
+{
+	kfree(hw->hw_info.share);
+	hw->hw_info.share = NULL;
+}
+
+static int fjes_hw_alloc_epbuf(struct epbuf_handler *epbh)
+{
+	void *mem;
+
+	mem = vzalloc(EP_BUFFER_SIZE);
+	if (!mem)
+		return -ENOMEM;
+
+	epbh->buffer = mem;
+	epbh->size = EP_BUFFER_SIZE;
+
+	epbh->info = (union ep_buffer_info *)mem;
+	epbh->ring = (u8 *)(mem + sizeof(union ep_buffer_info));
+
+	return 0;
+}
+
+static void fjes_hw_free_epbuf(struct epbuf_handler *epbh)
+{
+	if (epbh->buffer)
+		vfree(epbh->buffer);
+
+	epbh->buffer = NULL;
+	epbh->size = 0;
+
+	epbh->info = NULL;
+	epbh->ring = NULL;
+}
+
+void fjes_hw_setup_epbuf(struct epbuf_handler *epbh, u8 *mac_addr, u32 mtu)
+{
+	union ep_buffer_info *info = epbh->info;
+	u16 vlan_id[EP_BUFFER_SUPPORT_VLAN_MAX];
+	int i;
+
+	for (i = 0; i < EP_BUFFER_SUPPORT_VLAN_MAX; i++)
+		vlan_id[i] = info->v1i.vlan_id[i];
+
+	memset(info, 0, sizeof(union ep_buffer_info));
+
+	info->v1i.version = 0;  /* version 0 */
+
+	for (i = 0; i < ETH_ALEN; i++)
+		info->v1i.mac_addr[i] = mac_addr[i];
+
+	info->v1i.head = 0;
+	info->v1i.tail = 1;
+
+	info->v1i.info_size = sizeof(union ep_buffer_info);
+	info->v1i.buffer_size = epbh->size - info->v1i.info_size;
+
+	info->v1i.frame_max = FJES_MTU_TO_FRAME_SIZE(mtu);
+	info->v1i.count_max =
+	    EP_RING_NUM(info->v1i.buffer_size, info->v1i.frame_max);
+
+	for (i = 0; i < EP_BUFFER_SUPPORT_VLAN_MAX; i++)
+		info->v1i.vlan_id[i] = vlan_id[i];
+}
+
+void
+fjes_hw_init_command_registers(struct fjes_hw *hw,
+			       struct fjes_device_command_param *param)
+{
+	/* Request Buffer length */
+	wr32(XSCT_REQBL, (__le32)(param->req_len));
+	/* Response Buffer Length */
+	wr32(XSCT_RESPBL, (__le32)(param->res_len));
+
+	/* Request Buffer Address */
+	wr32(XSCT_REQBAL,
+	     (__le32)(param->req_start & GENMASK_ULL(31, 0)));
+	wr32(XSCT_REQBAH,
+	     (__le32)((param->req_start & GENMASK_ULL(63, 32)) >> 32));
+
+	/* Response Buffer Address */
+	wr32(XSCT_RESPBAL,
+	     (__le32)(param->res_start & GENMASK_ULL(31, 0)));
+	wr32(XSCT_RESPBAH,
+	     (__le32)((param->res_start & GENMASK_ULL(63, 32)) >> 32));
+
+	/* Share status address */
+	wr32(XSCT_SHSTSAL,
+	     (__le32)(param->share_start & GENMASK_ULL(31, 0)));
+	wr32(XSCT_SHSTSAH,
+	     (__le32)((param->share_start & GENMASK_ULL(63, 32)) >> 32));
+}
+
+static int fjes_hw_setup(struct fjes_hw *hw)
+{
+	u8 mac[ETH_ALEN] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+	struct fjes_device_command_param param;
+	struct ep_share_mem_info *buf_pair;
+	size_t mem_size;
+	int result;
+	int epidx;
+	void *buf;
+
+	hw->hw_info.max_epid = &hw->max_epid;
+	hw->hw_info.my_epid = &hw->my_epid;
+
+	buf = kcalloc(hw->max_epid, sizeof(struct ep_share_mem_info),
+		      GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	hw->ep_shm_info = (struct ep_share_mem_info *)buf;
+
+	mem_size = FJES_DEV_REQ_BUF_SIZE(hw->max_epid);
+	hw->hw_info.req_buf = kzalloc(mem_size, GFP_KERNEL);
+	if (!(hw->hw_info.req_buf))
+		return -ENOMEM;
+
+	hw->hw_info.req_buf_size = mem_size;
+
+	mem_size = FJES_DEV_RES_BUF_SIZE(hw->max_epid);
+	hw->hw_info.res_buf = kzalloc(mem_size, GFP_KERNEL);
+	if (!(hw->hw_info.res_buf))
+		return -ENOMEM;
+
+	hw->hw_info.res_buf_size = mem_size;
+
+	result = fjes_hw_alloc_shared_status_region(hw);
+	if (result)
+		return result;
+
+	hw->hw_info.buffer_share_bit = 0;
+	hw->hw_info.buffer_unshare_reserve_bit = 0;
+
+	for (epidx = 0; epidx < hw->max_epid; epidx++) {
+		if (epidx != hw->my_epid) {
+			buf_pair = &hw->ep_shm_info[epidx];
+
+			result = fjes_hw_alloc_epbuf(&buf_pair->tx);
+			if (result)
+				return result;
+
+			result = fjes_hw_alloc_epbuf(&buf_pair->rx);
+			if (result)
+				return result;
+
+			fjes_hw_setup_epbuf(&buf_pair->tx, mac,
+					    fjes_support_mtu[0]);
+			fjes_hw_setup_epbuf(&buf_pair->rx, mac,
+					    fjes_support_mtu[0]);
+		}
+	}
+
+	memset(&param, 0, sizeof(param));
+
+	param.req_len = hw->hw_info.req_buf_size;
+	param.req_start = __pa(hw->hw_info.req_buf);
+	param.res_len = hw->hw_info.res_buf_size;
+	param.res_start = __pa(hw->hw_info.res_buf);
+
+	param.share_start = __pa(hw->hw_info.share->ep_status);
+
+	fjes_hw_init_command_registers(hw, &param);
+
+	return 0;
+}
+
+static void fjes_hw_cleanup(struct fjes_hw *hw)
+{
+	int epidx;
+
+	if (!hw->ep_shm_info)
+		return;
+
+	fjes_hw_free_shared_status_region(hw);
+
+	kfree(hw->hw_info.req_buf);
+	hw->hw_info.req_buf = NULL;
+
+	kfree(hw->hw_info.res_buf);
+	hw->hw_info.res_buf = NULL;
+
+	for (epidx = 0; epidx < hw->max_epid ; epidx++) {
+		if (epidx == hw->my_epid)
+			continue;
+		fjes_hw_free_epbuf(&hw->ep_shm_info[epidx].tx);
+		fjes_hw_free_epbuf(&hw->ep_shm_info[epidx].rx);
+	}
+
+	kfree(hw->ep_shm_info);
+	hw->ep_shm_info = NULL;
+}
+
+int fjes_hw_init(struct fjes_hw *hw)
+{
+	int ret;
+
+	hw->base = fjes_hw_iomap(hw);
+	if (!hw->base)
+		return -EIO;
+
+	ret = fjes_hw_reset(hw);
+	if (ret)
+		return ret;
+
+	fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, true);
+
+	INIT_WORK(&hw->update_zone_task, fjes_hw_update_zone_task);
+	INIT_WORK(&hw->epstop_task, fjes_hw_epstop_task);
+
+	mutex_init(&hw->hw_info.lock);
+
+	hw->max_epid = fjes_hw_get_max_epid(hw);
+	hw->my_epid = fjes_hw_get_my_epid(hw);
+
+	if ((hw->max_epid == 0) || (hw->my_epid >= hw->max_epid))
+		return -ENXIO;
+
+	ret = fjes_hw_setup(hw);
+
+	return ret;
+}
+
+void fjes_hw_exit(struct fjes_hw *hw)
+{
+	int ret;
+
+	if (hw->base) {
+		ret = fjes_hw_reset(hw);
+		if (ret)
+			pr_err("%s: reset error", __func__);
+
+		fjes_hw_iounmap(hw);
+		hw->base = NULL;
+	}
+
+	fjes_hw_cleanup(hw);
+
+	cancel_work_sync(&hw->update_zone_task);
+	cancel_work_sync(&hw->epstop_task);
+}
+
+static enum fjes_dev_command_response_e
+fjes_hw_issue_request_command(struct fjes_hw *hw,
+			      enum fjes_dev_command_request_type type)
+{
+	enum fjes_dev_command_response_e ret = FJES_CMD_STATUS_UNKNOWN;
+	union REG_CR cr;
+	union REG_CS cs;
+	int timeout;
+
+	cr.reg = 0;
+	cr.bits.req_start = 1;
+	cr.bits.req_code = type;
+	wr32(XSCT_CR, cr.reg);
+	cr.reg = rd32(XSCT_CR);
+
+	if (cr.bits.error == 0) {
+		timeout = FJES_COMMAND_REQ_TIMEOUT * 1000;
+		cs.reg = rd32(XSCT_CS);
+
+		while ((cs.bits.complete != 1) && timeout > 0) {
+			msleep(1000);
+			cs.reg = rd32(XSCT_CS);
+			timeout -= 1000;
+		}
+
+		if (cs.bits.complete == 1)
+			ret = FJES_CMD_STATUS_NORMAL;
+		else if (timeout <= 0)
+			ret = FJES_CMD_STATUS_TIMEOUT;
+
+	} else {
+		switch (cr.bits.err_info) {
+		case FJES_CMD_REQ_ERR_INFO_PARAM:
+			ret = FJES_CMD_STATUS_ERROR_PARAM;
+			break;
+		case FJES_CMD_REQ_ERR_INFO_STATUS:
+			ret = FJES_CMD_STATUS_ERROR_STATUS;
+			break;
+		default:
+			ret = FJES_CMD_STATUS_UNKNOWN;
+			break;
+		}
+	}
+
+	return ret;
+}
+
+int fjes_hw_request_info(struct fjes_hw *hw)
+{
+	union fjes_device_command_req *req_buf = hw->hw_info.req_buf;
+	union fjes_device_command_res *res_buf = hw->hw_info.res_buf;
+	enum fjes_dev_command_response_e ret;
+	int result;
+
+	memset(req_buf, 0, hw->hw_info.req_buf_size);
+	memset(res_buf, 0, hw->hw_info.res_buf_size);
+
+	req_buf->info.length = FJES_DEV_COMMAND_INFO_REQ_LEN;
+
+	res_buf->info.length = 0;
+	res_buf->info.code = 0;
+
+	ret = fjes_hw_issue_request_command(hw, FJES_CMD_REQ_INFO);
+
+	result = 0;
+
+	if (FJES_DEV_COMMAND_INFO_RES_LEN((*hw->hw_info.max_epid)) !=
+		res_buf->info.length) {
+		result = -ENOMSG;
+	} else if (ret == FJES_CMD_STATUS_NORMAL) {
+		switch (res_buf->info.code) {
+		case FJES_CMD_REQ_RES_CODE_NORMAL:
+			result = 0;
+			break;
+		default:
+			result = -EPERM;
+			break;
+		}
+	} else {
+		switch (ret) {
+		case FJES_CMD_STATUS_UNKNOWN:
+			result = -EPERM;
+			break;
+		case FJES_CMD_STATUS_TIMEOUT:
+			result = -EBUSY;
+			break;
+		case FJES_CMD_STATUS_ERROR_PARAM:
+			result = -EPERM;
+			break;
+		case FJES_CMD_STATUS_ERROR_STATUS:
+			result = -EPERM;
+			break;
+		default:
+			result = -EPERM;
+			break;
+		}
+	}
+
+	return result;
+}
+
+int fjes_hw_register_buff_addr(struct fjes_hw *hw, int dest_epid,
+			       struct ep_share_mem_info *buf_pair)
+{
+	union fjes_device_command_req *req_buf = hw->hw_info.req_buf;
+	union fjes_device_command_res *res_buf = hw->hw_info.res_buf;
+	enum fjes_dev_command_response_e ret;
+	int page_count;
+	int timeout;
+	int i, idx;
+	void *addr;
+	int result;
+
+	if (test_bit(dest_epid, &hw->hw_info.buffer_share_bit))
+		return 0;
+
+	memset(req_buf, 0, hw->hw_info.req_buf_size);
+	memset(res_buf, 0, hw->hw_info.res_buf_size);
+
+	req_buf->share_buffer.length = FJES_DEV_COMMAND_SHARE_BUFFER_REQ_LEN(
+						buf_pair->tx.size,
+						buf_pair->rx.size);
+	req_buf->share_buffer.epid = dest_epid;
+
+	idx = 0;
+	req_buf->share_buffer.buffer[idx++] = buf_pair->tx.size;
+	page_count = buf_pair->tx.size / EP_BUFFER_INFO_SIZE;
+	for (i = 0; i < page_count; i++) {
+		addr = ((u8 *)(buf_pair->tx.buffer)) +
+				(i * EP_BUFFER_INFO_SIZE);
+		req_buf->share_buffer.buffer[idx++] =
+				(__le64)(page_to_phys(vmalloc_to_page(addr)) +
+						offset_in_page(addr));
+	}
+
+	req_buf->share_buffer.buffer[idx++] = buf_pair->rx.size;
+	page_count = buf_pair->rx.size / EP_BUFFER_INFO_SIZE;
+	for (i = 0; i < page_count; i++) {
+		addr = ((u8 *)(buf_pair->rx.buffer)) +
+				(i * EP_BUFFER_INFO_SIZE);
+		req_buf->share_buffer.buffer[idx++] =
+				(__le64)(page_to_phys(vmalloc_to_page(addr)) +
+						offset_in_page(addr));
+	}
+
+	res_buf->share_buffer.length = 0;
+	res_buf->share_buffer.code = 0;
+
+	ret = fjes_hw_issue_request_command(hw, FJES_CMD_REQ_SHARE_BUFFER);
+
+	timeout = FJES_COMMAND_REQ_BUFF_TIMEOUT * 1000;
+	while ((ret == FJES_CMD_STATUS_NORMAL) &&
+	       (res_buf->share_buffer.length ==
+		FJES_DEV_COMMAND_SHARE_BUFFER_RES_LEN) &&
+	       (res_buf->share_buffer.code == FJES_CMD_REQ_RES_CODE_BUSY) &&
+	       (timeout > 0)) {
+			msleep(200 + hw->my_epid * 20);
+			timeout -= (200 + hw->my_epid * 20);
+
+			res_buf->share_buffer.length = 0;
+			res_buf->share_buffer.code = 0;
+
+			ret = fjes_hw_issue_request_command(
+					hw, FJES_CMD_REQ_SHARE_BUFFER);
+	}
+
+	result = 0;
+
+	if (res_buf->share_buffer.length !=
+			FJES_DEV_COMMAND_SHARE_BUFFER_RES_LEN)
+		result = -ENOMSG;
+	else if (ret == FJES_CMD_STATUS_NORMAL) {
+		switch (res_buf->share_buffer.code) {
+		case FJES_CMD_REQ_RES_CODE_NORMAL:
+			result = 0;
+			set_bit(dest_epid, &hw->hw_info.buffer_share_bit);
+			break;
+		case FJES_CMD_REQ_RES_CODE_BUSY:
+			result = -EBUSY;
+			break;
+		default:
+			result = -EPERM;
+			break;
+		}
+	} else {
+		switch (ret) {
+		case FJES_CMD_STATUS_UNKNOWN:
+			result = -EPERM;
+			break;
+		case FJES_CMD_STATUS_TIMEOUT:
+			result = -EBUSY;
+			break;
+		case FJES_CMD_STATUS_ERROR_PARAM:
+		case FJES_CMD_STATUS_ERROR_STATUS:
+		default:
+			result = -EPERM;
+			break;
+		}
+	}
+
+	return result;
+}
+
+int fjes_hw_unregister_buff_addr(struct fjes_hw *hw, int dest_epid)
+{
+	union fjes_device_command_req *req_buf = hw->hw_info.req_buf;
+	union fjes_device_command_res *res_buf = hw->hw_info.res_buf;
+	struct fjes_device_shared_info *share = hw->hw_info.share;
+	enum fjes_dev_command_response_e ret;
+	int timeout;
+	int result;
+
+	if (!hw->base)
+		return -EPERM;
+
+	if (!req_buf || !res_buf || !share)
+		return -EPERM;
+
+	if (!test_bit(dest_epid, &hw->hw_info.buffer_share_bit))
+		return 0;
+
+	memset(req_buf, 0, hw->hw_info.req_buf_size);
+	memset(res_buf, 0, hw->hw_info.res_buf_size);
+
+	req_buf->unshare_buffer.length =
+			FJES_DEV_COMMAND_UNSHARE_BUFFER_REQ_LEN;
+	req_buf->unshare_buffer.epid = dest_epid;
+
+	res_buf->unshare_buffer.length = 0;
+	res_buf->unshare_buffer.code = 0;
+
+	ret = fjes_hw_issue_request_command(hw, FJES_CMD_REQ_UNSHARE_BUFFER);
+
+	timeout = FJES_COMMAND_REQ_BUFF_TIMEOUT * 1000;
+	while ((ret == FJES_CMD_STATUS_NORMAL) &&
+	       (res_buf->unshare_buffer.length ==
+		FJES_DEV_COMMAND_UNSHARE_BUFFER_RES_LEN) &&
+	       (res_buf->unshare_buffer.code ==
+		FJES_CMD_REQ_RES_CODE_BUSY) &&
+	       (timeout > 0)) {
+		msleep(200 + hw->my_epid * 20);
+			timeout -= (200 + hw->my_epid * 20);
+
+		res_buf->unshare_buffer.length = 0;
+		res_buf->unshare_buffer.code = 0;
+
+		ret =
+		fjes_hw_issue_request_command(hw, FJES_CMD_REQ_UNSHARE_BUFFER);
+	}
+
+	result = 0;
+
+	if (res_buf->unshare_buffer.length !=
+			FJES_DEV_COMMAND_UNSHARE_BUFFER_RES_LEN) {
+		result = -ENOMSG;
+	} else if (ret == FJES_CMD_STATUS_NORMAL) {
+		switch (res_buf->unshare_buffer.code) {
+		case FJES_CMD_REQ_RES_CODE_NORMAL:
+			result = 0;
+			clear_bit(dest_epid, &hw->hw_info.buffer_share_bit);
+			break;
+		case FJES_CMD_REQ_RES_CODE_BUSY:
+			result = -EBUSY;
+			break;
+		default:
+			result = -EPERM;
+			break;
+		}
+	} else {
+		switch (ret) {
+		case FJES_CMD_STATUS_UNKNOWN:
+			result = -EPERM;
+			break;
+		case FJES_CMD_STATUS_TIMEOUT:
+			result = -EBUSY;
+			break;
+		case FJES_CMD_STATUS_ERROR_PARAM:
+		case FJES_CMD_STATUS_ERROR_STATUS:
+		default:
+			result = -EPERM;
+			break;
+		}
+	}
+
+	return result;
+}
+
+int fjes_hw_raise_interrupt(struct fjes_hw *hw, int dest_epid,
+			    enum REG_ICTL_MASK  mask)
+{
+	u32 ig = mask | dest_epid;
+
+	wr32(XSCT_IG, cpu_to_le32(ig));
+
+	return 0;
+}
+
+u32 fjes_hw_capture_interrupt_status(struct fjes_hw *hw)
+{
+	u32 cur_is;
+
+	cur_is = rd32(XSCT_IS);
+
+	return cur_is;
+}
+
+void fjes_hw_set_irqmask(struct fjes_hw *hw,
+			 enum REG_ICTL_MASK intr_mask, bool mask)
+{
+	if (mask)
+		wr32(XSCT_IMS, intr_mask);
+	else
+		wr32(XSCT_IMC, intr_mask);
+}
+
+bool fjes_hw_epid_is_same_zone(struct fjes_hw *hw, int epid)
+{
+	if (epid >= hw->max_epid)
+		return false;
+
+	if ((hw->ep_shm_info[epid].es_status !=
+			FJES_ZONING_STATUS_ENABLE) ||
+		(hw->ep_shm_info[hw->my_epid].zone ==
+			FJES_ZONING_ZONE_TYPE_NONE))
+		return false;
+	else
+		return (hw->ep_shm_info[epid].zone ==
+				hw->ep_shm_info[hw->my_epid].zone);
+}
+
+int fjes_hw_epid_is_shared(struct fjes_device_shared_info *share,
+			   int dest_epid)
+{
+	int value = false;
+
+	if (dest_epid < share->epnum)
+		value = share->ep_status[dest_epid];
+
+	return value;
+}
+
+static bool fjes_hw_epid_is_stop_requested(struct fjes_hw *hw, int src_epid)
+{
+	return test_bit(src_epid, &hw->txrx_stop_req_bit);
+}
+
+static bool fjes_hw_epid_is_stop_process_done(struct fjes_hw *hw, int src_epid)
+{
+	return (hw->ep_shm_info[src_epid].tx.info->v1i.rx_status &
+			FJES_RX_STOP_REQ_DONE);
+}
+
+enum ep_partner_status
+fjes_hw_get_partner_ep_status(struct fjes_hw *hw, int epid)
+{
+	enum ep_partner_status status;
+
+	if (fjes_hw_epid_is_shared(hw->hw_info.share, epid)) {
+		if (fjes_hw_epid_is_stop_requested(hw, epid)) {
+			status = EP_PARTNER_WAITING;
+		} else {
+			if (fjes_hw_epid_is_stop_process_done(hw, epid))
+				status = EP_PARTNER_COMPLETE;
+			else
+				status = EP_PARTNER_SHARED;
+		}
+	} else {
+		status = EP_PARTNER_UNSHARE;
+	}
+
+	return status;
+}
+
+void fjes_hw_raise_epstop(struct fjes_hw *hw)
+{
+	enum ep_partner_status status;
+	int epidx;
+
+	for (epidx = 0; epidx < hw->max_epid; epidx++) {
+		if (epidx == hw->my_epid)
+			continue;
+
+		status = fjes_hw_get_partner_ep_status(hw, epidx);
+		switch (status) {
+		case EP_PARTNER_SHARED:
+			fjes_hw_raise_interrupt(hw, epidx,
+						REG_ICTL_MASK_TXRX_STOP_REQ);
+			break;
+		default:
+			break;
+		}
+
+		set_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit);
+		set_bit(epidx, &hw->txrx_stop_req_bit);
+
+		hw->ep_shm_info[epidx].tx.info->v1i.rx_status |=
+				FJES_RX_STOP_REQ_REQUEST;
+	}
+}
+
+int fjes_hw_wait_epstop(struct fjes_hw *hw)
+{
+	enum ep_partner_status status;
+	union ep_buffer_info *info;
+	int wait_time = 0;
+	int epidx;
+
+	while (hw->hw_info.buffer_unshare_reserve_bit &&
+	       (wait_time < FJES_COMMAND_EPSTOP_WAIT_TIMEOUT * 1000)) {
+		for (epidx = 0; epidx < hw->max_epid; epidx++) {
+			if (epidx == hw->my_epid)
+				continue;
+			status = fjes_hw_epid_is_shared(hw->hw_info.share,
+							epidx);
+			info = hw->ep_shm_info[epidx].rx.info;
+			if ((!status ||
+			     (info->v1i.rx_status &
+			      FJES_RX_STOP_REQ_DONE)) &&
+			    test_bit(epidx,
+				     &hw->hw_info.buffer_unshare_reserve_bit)) {
+				clear_bit(epidx,
+					  &hw->hw_info.buffer_unshare_reserve_bit);
+			}
+		}
+
+		msleep(100);
+		wait_time += 100;
+	}
+
+	for (epidx = 0; epidx < hw->max_epid; epidx++) {
+		if (epidx == hw->my_epid)
+			continue;
+		if (test_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit))
+			clear_bit(epidx,
+				  &hw->hw_info.buffer_unshare_reserve_bit);
+	}
+
+	return (wait_time < FJES_COMMAND_EPSTOP_WAIT_TIMEOUT * 1000)
+			? 0 : -EBUSY;
+}
+
+bool fjes_hw_check_epbuf_version(struct epbuf_handler *epbh, u32 version)
+{
+	union ep_buffer_info *info = epbh->info;
+
+	return (info->common.version == version);
+}
+
+bool fjes_hw_check_mtu(struct epbuf_handler *epbh, u32 mtu)
+{
+	union ep_buffer_info *info = epbh->info;
+
+	return (info->v1i.frame_max == FJES_MTU_TO_FRAME_SIZE(mtu));
+}
+
+bool fjes_hw_check_vlan_id(struct epbuf_handler *epbh, u16 vlan_id)
+{
+	union ep_buffer_info *info = epbh->info;
+	bool ret = false;
+	int i;
+
+	if (vlan_id == 0) {
+		ret = true;
+	} else {
+		for (i = 0; i < EP_BUFFER_SUPPORT_VLAN_MAX; i++) {
+			if (vlan_id == info->v1i.vlan_id[i]) {
+				ret = true;
+				break;
+			}
+		}
+	}
+	return ret;
+}
+
+bool fjes_hw_set_vlan_id(struct epbuf_handler *epbh, u16 vlan_id)
+{
+	union ep_buffer_info *info = epbh->info;
+	int i;
+
+	for (i = 0; i < EP_BUFFER_SUPPORT_VLAN_MAX; i++) {
+		if (info->v1i.vlan_id[i] == 0) {
+			info->v1i.vlan_id[i] = vlan_id;
+			return true;
+		}
+	}
+	return false;
+}
+
+void fjes_hw_del_vlan_id(struct epbuf_handler *epbh, u16 vlan_id)
+{
+	union ep_buffer_info *info = epbh->info;
+	int i;
+
+	if (0 != vlan_id) {
+		for (i = 0; i < EP_BUFFER_SUPPORT_VLAN_MAX; i++) {
+			if (vlan_id == info->v1i.vlan_id[i])
+				info->v1i.vlan_id[i] = 0;
+		}
+	}
+}
+
+bool fjes_hw_epbuf_rx_is_empty(struct epbuf_handler *epbh)
+{
+	union ep_buffer_info *info = epbh->info;
+
+	if (info->v1i.count_max == 0)
+		return true;
+
+	return EP_RING_EMPTY(info->v1i.head, info->v1i.tail,
+			     info->v1i.count_max);
+}
+
+void *fjes_hw_epbuf_rx_curpkt_get_addr(struct epbuf_handler *epbh,
+				       size_t *psize)
+{
+	union ep_buffer_info *info = epbh->info;
+	struct esmem_frame *ring_frame;
+	void *frame;
+
+	ring_frame = (struct esmem_frame *)&(epbh->ring[EP_RING_INDEX
+					     (info->v1i.head,
+					      info->v1i.count_max) *
+					     info->v1i.frame_max]);
+
+	*psize = (size_t)ring_frame->frame_size;
+
+	frame = ring_frame->frame_data;
+
+	return frame;
+}
+
+void fjes_hw_epbuf_rx_curpkt_drop(struct epbuf_handler *epbh)
+{
+	union ep_buffer_info *info = epbh->info;
+
+	if (fjes_hw_epbuf_rx_is_empty(epbh))
+		return;
+
+	EP_RING_INDEX_INC(epbh->info->v1i.head, info->v1i.count_max);
+}
+
+int fjes_hw_epbuf_tx_pkt_send(struct epbuf_handler *epbh,
+			      void *frame, size_t size)
+{
+	union ep_buffer_info *info = epbh->info;
+	struct esmem_frame *ring_frame;
+
+	if (EP_RING_FULL(info->v1i.head, info->v1i.tail, info->v1i.count_max))
+		return -ENOBUFS;
+
+	ring_frame = (struct esmem_frame *)&(epbh->ring[EP_RING_INDEX
+					     (info->v1i.tail - 1,
+					      info->v1i.count_max) *
+					     info->v1i.frame_max]);
+
+	ring_frame->frame_size = size;
+	memcpy((void *)(ring_frame->frame_data), (void *)frame, size);
+
+	EP_RING_INDEX_INC(epbh->info->v1i.tail, info->v1i.count_max);
+
+	return 0;
+}
+
+static void fjes_hw_update_zone_task(struct work_struct *work)
+{
+	struct fjes_hw *hw = container_of(work,
+			struct fjes_hw, update_zone_task);
+
+	struct my_s {u8 es_status; u8 zone; } *info;
+	union fjes_device_command_res *res_buf;
+	enum ep_partner_status pstatus;
+
+	struct fjes_adapter *adapter;
+	struct net_device *netdev;
+
+	ulong unshare_bit = 0;
+	ulong share_bit = 0;
+	ulong irq_bit = 0;
+
+	int epidx;
+	int ret;
+
+	adapter = (struct fjes_adapter *)hw->back;
+	netdev = adapter->netdev;
+	res_buf = hw->hw_info.res_buf;
+	info = (struct my_s *)&res_buf->info.info;
+
+	mutex_lock(&hw->hw_info.lock);
+
+	ret = fjes_hw_request_info(hw);
+	switch (ret) {
+	case -ENOMSG:
+	case -EBUSY:
+	default:
+		if (!work_pending(&adapter->force_close_task)) {
+			adapter->force_reset = true;
+			schedule_work(&adapter->force_close_task);
+		}
+		break;
+
+	case 0:
+
+		for (epidx = 0; epidx < hw->max_epid; epidx++) {
+			if (epidx == hw->my_epid) {
+				hw->ep_shm_info[epidx].es_status =
+					info[epidx].es_status;
+				hw->ep_shm_info[epidx].zone =
+					info[epidx].zone;
+				continue;
+			}
+
+			pstatus = fjes_hw_get_partner_ep_status(hw, epidx);
+			switch (pstatus) {
+			case EP_PARTNER_UNSHARE:
+			default:
+				if ((info[epidx].zone !=
+					FJES_ZONING_ZONE_TYPE_NONE) &&
+				    (info[epidx].es_status ==
+					FJES_ZONING_STATUS_ENABLE) &&
+				    (info[epidx].zone ==
+					info[hw->my_epid].zone))
+					set_bit(epidx, &share_bit);
+				else
+					set_bit(epidx, &unshare_bit);
+				break;
+
+			case EP_PARTNER_COMPLETE:
+			case EP_PARTNER_WAITING:
+				if ((info[epidx].zone ==
+					FJES_ZONING_ZONE_TYPE_NONE) ||
+				    (info[epidx].es_status !=
+					FJES_ZONING_STATUS_ENABLE) ||
+				    (info[epidx].zone !=
+					info[hw->my_epid].zone)) {
+					set_bit(epidx,
+						&adapter->unshare_watch_bitmask);
+					set_bit(epidx,
+						&hw->hw_info.buffer_unshare_reserve_bit);
+				}
+				break;
+
+			case EP_PARTNER_SHARED:
+				if ((info[epidx].zone ==
+					FJES_ZONING_ZONE_TYPE_NONE) ||
+				    (info[epidx].es_status !=
+					FJES_ZONING_STATUS_ENABLE) ||
+				    (info[epidx].zone !=
+					info[hw->my_epid].zone))
+					set_bit(epidx, &irq_bit);
+				break;
+			}
+
+			hw->ep_shm_info[epidx].es_status =
+				info[epidx].es_status;
+			hw->ep_shm_info[epidx].zone = info[epidx].zone;
+		}
+		break;
+	}
+
+	mutex_unlock(&hw->hw_info.lock);
+
+	for (epidx = 0; epidx < hw->max_epid; epidx++) {
+		if (epidx == hw->my_epid)
+			continue;
+
+		if (test_bit(epidx, &share_bit)) {
+			fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
+					    netdev->dev_addr, netdev->mtu);
+
+			mutex_lock(&hw->hw_info.lock);
+
+			ret = fjes_hw_register_buff_addr(
+				hw, epidx, &hw->ep_shm_info[epidx]);
+
+			switch (ret) {
+			case 0:
+				break;
+			case -ENOMSG:
+			case -EBUSY:
+			default:
+				if (!work_pending(&adapter->force_close_task)) {
+					adapter->force_reset = true;
+					schedule_work(
+					  &adapter->force_close_task);
+				}
+				break;
+			}
+			mutex_unlock(&hw->hw_info.lock);
+		}
+
+		if (test_bit(epidx, &unshare_bit)) {
+			mutex_lock(&hw->hw_info.lock);
+
+			ret = fjes_hw_unregister_buff_addr(hw, epidx);
+
+			switch (ret) {
+			case 0:
+				break;
+			case -ENOMSG:
+			case -EBUSY:
+			default:
+				if (!work_pending(&adapter->force_close_task)) {
+					adapter->force_reset = true;
+					schedule_work(
+					  &adapter->force_close_task);
+				}
+				break;
+			}
+
+			mutex_unlock(&hw->hw_info.lock);
+
+			if (ret == 0)
+				fjes_hw_setup_epbuf(
+					&hw->ep_shm_info[epidx].tx,
+					netdev->dev_addr, netdev->mtu);
+		}
+
+		if (test_bit(epidx, &irq_bit)) {
+			fjes_hw_raise_interrupt(hw, epidx,
+						REG_ICTL_MASK_TXRX_STOP_REQ);
+
+			set_bit(epidx, &hw->txrx_stop_req_bit);
+			hw->ep_shm_info[epidx].tx.
+				info->v1i.rx_status |=
+					FJES_RX_STOP_REQ_REQUEST;
+			set_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit);
+		}
+	}
+
+	if (irq_bit || adapter->unshare_watch_bitmask) {
+		if (!work_pending(&adapter->unshare_watch_task))
+			queue_work(adapter->control_wq,
+				   &adapter->unshare_watch_task);
+	}
+}
+
+static void fjes_hw_epstop_task(struct work_struct *work)
+{
+	struct fjes_hw *hw = container_of(work, struct fjes_hw, epstop_task);
+	struct fjes_adapter *adapter = (struct fjes_adapter *)hw->back;
+
+	ulong remain_bit;
+	int epid_bit;
+
+	while ((remain_bit = hw->epstop_req_bit)) {
+		for (epid_bit = 0; remain_bit; remain_bit >>= 1, epid_bit++) {
+			if (remain_bit & 1) {
+				hw->ep_shm_info[epid_bit].
+					tx.info->v1i.rx_status |=
+						FJES_RX_STOP_REQ_DONE;
+
+				clear_bit(epid_bit, &hw->epstop_req_bit);
+				set_bit(epid_bit,
+					&adapter->unshare_watch_bitmask);
+
+				if (!work_pending(&adapter->unshare_watch_task))
+					queue_work(
+						adapter->control_wq,
+						&adapter->unshare_watch_task);
+			}
+		}
+	}
+}