mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-01 13:46:42 +07:00
a18aaec21e
This patch adds hardware cleanup routine to be invoked at driver's .remove routine. Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
362 lines
7.8 KiB
C
362 lines
7.8 KiB
C
/*
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* FUJITSU Extended Socket Network Device driver
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* Copyright (c) 2015 FUJITSU LIMITED
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, see <http://www.gnu.org/licenses/>.
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*
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* The full GNU General Public License is included in this distribution in
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* the file called "COPYING".
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*
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*/
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#include "fjes_hw.h"
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#include "fjes.h"
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/* supported MTU list */
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const u32 fjes_support_mtu[] = {
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FJES_MTU_DEFINE(8 * 1024),
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FJES_MTU_DEFINE(16 * 1024),
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FJES_MTU_DEFINE(32 * 1024),
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FJES_MTU_DEFINE(64 * 1024),
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0
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};
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u32 fjes_hw_rd32(struct fjes_hw *hw, u32 reg)
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{
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u8 *base = hw->base;
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u32 value = 0;
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value = readl(&base[reg]);
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return value;
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}
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static u8 *fjes_hw_iomap(struct fjes_hw *hw)
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{
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u8 *base;
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if (!request_mem_region(hw->hw_res.start, hw->hw_res.size,
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fjes_driver_name)) {
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pr_err("request_mem_region failed\n");
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return NULL;
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}
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base = (u8 *)ioremap_nocache(hw->hw_res.start, hw->hw_res.size);
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return base;
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}
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static void fjes_hw_iounmap(struct fjes_hw *hw)
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{
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iounmap(hw->base);
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release_mem_region(hw->hw_res.start, hw->hw_res.size);
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}
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int fjes_hw_reset(struct fjes_hw *hw)
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{
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union REG_DCTL dctl;
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int timeout;
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dctl.reg = 0;
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dctl.bits.reset = 1;
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wr32(XSCT_DCTL, dctl.reg);
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timeout = FJES_DEVICE_RESET_TIMEOUT * 1000;
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dctl.reg = rd32(XSCT_DCTL);
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while ((dctl.bits.reset == 1) && (timeout > 0)) {
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msleep(1000);
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dctl.reg = rd32(XSCT_DCTL);
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timeout -= 1000;
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}
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return timeout > 0 ? 0 : -EIO;
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}
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static int fjes_hw_get_max_epid(struct fjes_hw *hw)
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{
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union REG_MAX_EP info;
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info.reg = rd32(XSCT_MAX_EP);
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return info.bits.maxep;
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}
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static int fjes_hw_get_my_epid(struct fjes_hw *hw)
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{
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union REG_OWNER_EPID info;
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info.reg = rd32(XSCT_OWNER_EPID);
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return info.bits.epid;
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}
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static int fjes_hw_alloc_shared_status_region(struct fjes_hw *hw)
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{
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size_t size;
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size = sizeof(struct fjes_device_shared_info) +
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(sizeof(u8) * hw->max_epid);
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hw->hw_info.share = kzalloc(size, GFP_KERNEL);
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if (!hw->hw_info.share)
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return -ENOMEM;
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hw->hw_info.share->epnum = hw->max_epid;
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return 0;
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}
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static void fjes_hw_free_shared_status_region(struct fjes_hw *hw)
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{
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kfree(hw->hw_info.share);
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hw->hw_info.share = NULL;
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}
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static int fjes_hw_alloc_epbuf(struct epbuf_handler *epbh)
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{
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void *mem;
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mem = vzalloc(EP_BUFFER_SIZE);
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if (!mem)
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return -ENOMEM;
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epbh->buffer = mem;
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epbh->size = EP_BUFFER_SIZE;
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epbh->info = (union ep_buffer_info *)mem;
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epbh->ring = (u8 *)(mem + sizeof(union ep_buffer_info));
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return 0;
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}
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static void fjes_hw_free_epbuf(struct epbuf_handler *epbh)
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{
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if (epbh->buffer)
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vfree(epbh->buffer);
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epbh->buffer = NULL;
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epbh->size = 0;
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epbh->info = NULL;
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epbh->ring = NULL;
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}
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void fjes_hw_setup_epbuf(struct epbuf_handler *epbh, u8 *mac_addr, u32 mtu)
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{
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union ep_buffer_info *info = epbh->info;
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u16 vlan_id[EP_BUFFER_SUPPORT_VLAN_MAX];
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int i;
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for (i = 0; i < EP_BUFFER_SUPPORT_VLAN_MAX; i++)
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vlan_id[i] = info->v1i.vlan_id[i];
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memset(info, 0, sizeof(union ep_buffer_info));
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info->v1i.version = 0; /* version 0 */
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for (i = 0; i < ETH_ALEN; i++)
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info->v1i.mac_addr[i] = mac_addr[i];
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info->v1i.head = 0;
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info->v1i.tail = 1;
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info->v1i.info_size = sizeof(union ep_buffer_info);
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info->v1i.buffer_size = epbh->size - info->v1i.info_size;
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info->v1i.frame_max = FJES_MTU_TO_FRAME_SIZE(mtu);
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info->v1i.count_max =
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EP_RING_NUM(info->v1i.buffer_size, info->v1i.frame_max);
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for (i = 0; i < EP_BUFFER_SUPPORT_VLAN_MAX; i++)
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info->v1i.vlan_id[i] = vlan_id[i];
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}
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void
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fjes_hw_init_command_registers(struct fjes_hw *hw,
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struct fjes_device_command_param *param)
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{
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/* Request Buffer length */
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wr32(XSCT_REQBL, (__le32)(param->req_len));
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/* Response Buffer Length */
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wr32(XSCT_RESPBL, (__le32)(param->res_len));
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/* Request Buffer Address */
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wr32(XSCT_REQBAL,
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(__le32)(param->req_start & GENMASK_ULL(31, 0)));
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wr32(XSCT_REQBAH,
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(__le32)((param->req_start & GENMASK_ULL(63, 32)) >> 32));
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/* Response Buffer Address */
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wr32(XSCT_RESPBAL,
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(__le32)(param->res_start & GENMASK_ULL(31, 0)));
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wr32(XSCT_RESPBAH,
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(__le32)((param->res_start & GENMASK_ULL(63, 32)) >> 32));
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/* Share status address */
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wr32(XSCT_SHSTSAL,
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(__le32)(param->share_start & GENMASK_ULL(31, 0)));
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wr32(XSCT_SHSTSAH,
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(__le32)((param->share_start & GENMASK_ULL(63, 32)) >> 32));
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}
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static int fjes_hw_setup(struct fjes_hw *hw)
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{
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u8 mac[ETH_ALEN] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
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struct fjes_device_command_param param;
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struct ep_share_mem_info *buf_pair;
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size_t mem_size;
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int result;
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int epidx;
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void *buf;
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hw->hw_info.max_epid = &hw->max_epid;
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hw->hw_info.my_epid = &hw->my_epid;
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buf = kcalloc(hw->max_epid, sizeof(struct ep_share_mem_info),
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GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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hw->ep_shm_info = (struct ep_share_mem_info *)buf;
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mem_size = FJES_DEV_REQ_BUF_SIZE(hw->max_epid);
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hw->hw_info.req_buf = kzalloc(mem_size, GFP_KERNEL);
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if (!(hw->hw_info.req_buf))
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return -ENOMEM;
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hw->hw_info.req_buf_size = mem_size;
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mem_size = FJES_DEV_RES_BUF_SIZE(hw->max_epid);
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hw->hw_info.res_buf = kzalloc(mem_size, GFP_KERNEL);
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if (!(hw->hw_info.res_buf))
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return -ENOMEM;
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hw->hw_info.res_buf_size = mem_size;
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result = fjes_hw_alloc_shared_status_region(hw);
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if (result)
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return result;
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hw->hw_info.buffer_share_bit = 0;
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hw->hw_info.buffer_unshare_reserve_bit = 0;
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for (epidx = 0; epidx < hw->max_epid; epidx++) {
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if (epidx != hw->my_epid) {
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buf_pair = &hw->ep_shm_info[epidx];
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result = fjes_hw_alloc_epbuf(&buf_pair->tx);
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if (result)
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return result;
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result = fjes_hw_alloc_epbuf(&buf_pair->rx);
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if (result)
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return result;
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fjes_hw_setup_epbuf(&buf_pair->tx, mac,
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fjes_support_mtu[0]);
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fjes_hw_setup_epbuf(&buf_pair->rx, mac,
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fjes_support_mtu[0]);
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}
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}
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memset(¶m, 0, sizeof(param));
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param.req_len = hw->hw_info.req_buf_size;
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param.req_start = __pa(hw->hw_info.req_buf);
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param.res_len = hw->hw_info.res_buf_size;
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param.res_start = __pa(hw->hw_info.res_buf);
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param.share_start = __pa(hw->hw_info.share->ep_status);
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fjes_hw_init_command_registers(hw, ¶m);
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return 0;
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}
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static void fjes_hw_cleanup(struct fjes_hw *hw)
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{
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int epidx;
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if (!hw->ep_shm_info)
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return;
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fjes_hw_free_shared_status_region(hw);
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kfree(hw->hw_info.req_buf);
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hw->hw_info.req_buf = NULL;
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kfree(hw->hw_info.res_buf);
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hw->hw_info.res_buf = NULL;
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for (epidx = 0; epidx < hw->max_epid ; epidx++) {
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if (epidx == hw->my_epid)
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continue;
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fjes_hw_free_epbuf(&hw->ep_shm_info[epidx].tx);
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fjes_hw_free_epbuf(&hw->ep_shm_info[epidx].rx);
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}
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kfree(hw->ep_shm_info);
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hw->ep_shm_info = NULL;
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}
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int fjes_hw_init(struct fjes_hw *hw)
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{
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int ret;
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hw->base = fjes_hw_iomap(hw);
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if (!hw->base)
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return -EIO;
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ret = fjes_hw_reset(hw);
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if (ret)
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return ret;
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fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, true);
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mutex_init(&hw->hw_info.lock);
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hw->max_epid = fjes_hw_get_max_epid(hw);
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hw->my_epid = fjes_hw_get_my_epid(hw);
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if ((hw->max_epid == 0) || (hw->my_epid >= hw->max_epid))
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return -ENXIO;
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ret = fjes_hw_setup(hw);
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return ret;
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}
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void fjes_hw_exit(struct fjes_hw *hw)
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{
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int ret;
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if (hw->base) {
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ret = fjes_hw_reset(hw);
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if (ret)
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pr_err("%s: reset error", __func__);
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fjes_hw_iounmap(hw);
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hw->base = NULL;
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}
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fjes_hw_cleanup(hw);
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}
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void fjes_hw_set_irqmask(struct fjes_hw *hw,
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enum REG_ICTL_MASK intr_mask, bool mask)
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{
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if (mask)
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wr32(XSCT_IMS, intr_mask);
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else
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wr32(XSCT_IMC, intr_mask);
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}
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