| Message ID | 1435114554-7151-3-git-send-email-izumi.taku@jp.fujitsu.com (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
On Wed, 24 Jun 2015 11:55:34 +0900 Taku Izumi <izumi.taku@jp.fujitsu.com> wrote: > This patch adds hardware initialization routine to be > invoked at driver's .probe routine. > > Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com> > --- > drivers/net/fjes/Makefile | 2 +- > drivers/net/fjes/fjes.h | 2 +- > drivers/net/fjes/fjes_hw.c | 297 +++++++++++++++++++++++++++++++++++++++++++ > drivers/net/fjes/fjes_hw.h | 250 ++++++++++++++++++++++++++++++++++++ > drivers/net/fjes/fjes_regs.h | 102 +++++++++++++++ > 5 files changed, 651 insertions(+), 2 deletions(-) > create mode 100644 drivers/net/fjes/fjes_hw.c > create mode 100644 drivers/net/fjes/fjes_hw.h > create mode 100644 drivers/net/fjes/fjes_regs.h > > diff --git a/drivers/net/fjes/Makefile b/drivers/net/fjes/Makefile > index 98e59cb..a67f65d8 100644 > --- a/drivers/net/fjes/Makefile > +++ b/drivers/net/fjes/Makefile > @@ -27,5 +27,5 @@ > > obj-$(CONFIG_FUJITSU_ES) += fjes.o > > -fjes-objs := fjes_main.o > +fjes-objs := fjes_main.o fjes_hw.o > > diff --git a/drivers/net/fjes/fjes.h b/drivers/net/fjes/fjes.h > index 4622da1..15ded96 100644 > --- a/drivers/net/fjes/fjes.h > +++ b/drivers/net/fjes/fjes.h > @@ -28,6 +28,6 @@ > > extern char fjes_driver_name[]; > extern char fjes_driver_version[]; > -extern u32 fjes_support_mtu[]; > +extern const u32 fjes_support_mtu[]; > > #endif /* FJES_H_ */ > diff --git a/drivers/net/fjes/fjes_hw.c b/drivers/net/fjes/fjes_hw.c > new file mode 100644 > index 0000000..68ef4d3 > --- /dev/null > +++ b/drivers/net/fjes/fjes_hw.c > @@ -0,0 +1,297 @@ > +/* > + * 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" > + > +/* 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; > +} > + > +int fjes_hw_reset(struct fjes_hw *hw) > +{ > + int timeout; > + union REG_DCTL dctl; > + > + 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 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; > +} > + > +void fjes_hw_setup_epbuf(struct epbuf_handler *epbh, u8 *mac_addr, u32 mtu) > +{ > + union ep_buffer_info *info = epbh->info; > + int i; > + u16 vlan_id[EP_BUFFER_SUPPORT_VLAN_MAX]; > + > + 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) > +{ > + int epidx; > + void *buf; > + struct ep_share_mem_info *buf_pair; > + size_t mem_size; > + int result; > + u8 mac[ETH_ALEN] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; > + struct fjes_device_command_param param; > + > + 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) { How about use the following condition so that you can delete a indent. if (epidx == hw->my_epid) continue; Thanks, Yasuaki Ishimatsu > + 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(¶m, 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, ¶m); > + > + return 0; > +} > + > +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); > + > + 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_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); > +} > + > diff --git a/drivers/net/fjes/fjes_hw.h b/drivers/net/fjes/fjes_hw.h > new file mode 100644 > index 0000000..6c53f8b > --- /dev/null > +++ b/drivers/net/fjes/fjes_hw.h > @@ -0,0 +1,250 @@ > +/* > + * 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". > + * > + */ > + > +#ifndef FJES_HW_H_ > +#define FJES_HW_H_ > + > +#include <linux/netdevice.h> > +#include <linux/if_vlan.h> > + > +#include "fjes_regs.h" > + > +struct fjes_hw; > + > +#define EP_BUFFER_SUPPORT_VLAN_MAX 4 > +#define EP_BUFFER_INFO_SIZE 4096 > + > +#define FJES_DEVICE_RESET_TIMEOUT ((17 + 1) * 3) /* sec */ > + > +#define EP_BUFFER_SIZE \ > + (((sizeof(union ep_buffer_info) + (128 * (64 * 1024))) \ > + / EP_BUFFER_INFO_SIZE) * EP_BUFFER_INFO_SIZE) > + > +#define EP_RING_NUM(buffer_size, frame_size) \ > + (u32)((buffer_size) / (frame_size)) > + > +#define FJES_MTU_TO_BUFFER_SIZE(mtu) \ > + (ETH_HLEN + VLAN_HLEN + (mtu) + ETH_FCS_LEN) > +#define FJES_MTU_TO_FRAME_SIZE(mtu) \ > + (sizeof(struct esmem_frame) + FJES_MTU_TO_BUFFER_SIZE(mtu)) > +#define FJES_MTU_DEFINE(size) \ > + ((size) - sizeof(struct esmem_frame) - \ > + (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN)) > + > +#define FJES_DEV_COMMAND_INFO_RES_LEN(epnum) (8 + 2 * (epnum)) > +#define FJES_DEV_COMMAND_SHARE_BUFFER_REQ_LEN(txb, rxb) \ > + (24 + (8 * ((txb) / EP_BUFFER_INFO_SIZE + (rxb) / EP_BUFFER_INFO_SIZE))) > + > +#define FJES_DEV_REQ_BUF_SIZE(maxep) \ > + FJES_DEV_COMMAND_SHARE_BUFFER_REQ_LEN(EP_BUFFER_SIZE, EP_BUFFER_SIZE) > +#define FJES_DEV_RES_BUF_SIZE(maxep) \ > + FJES_DEV_COMMAND_INFO_RES_LEN(maxep) > + > +/* Frame & MTU */ > +struct esmem_frame { > + __le32 frame_size; > + u8 frame_data[]; > +}; > + > +/* shared status region */ > +struct fjes_device_shared_info { > + int epnum; > + u8 ep_status[]; > +}; > + > +/* structures for command control request data*/ > +union fjes_device_command_req { > + struct { > + __le32 length; > + } info; > + struct { > + __le32 length; > + __le32 epid; > + __le64 buffer[]; > + } share_buffer; > + struct { > + __le32 length; > + __le32 epid; > + } unshare_buffer; > + struct { > + __le32 length; > + __le32 mode; > + __le64 buffer_len; > + __le64 buffer[]; > + } start_trace; > + struct { > + __le32 length; > + } stop_trace; > +}; > + > +/* structures for command control response data */ > +union fjes_device_command_res { > + struct { > + __le32 length; > + __le32 code; > + struct { > + u8 es_status; > + u8 zone; > + } info[]; > + } info; > + struct { > + __le32 length; > + __le32 code; > + } share_buffer; > + struct { > + __le32 length; > + __le32 code; > + } unshare_buffer; > + struct { > + __le32 length; > + __le32 code; > + } start_trace; > + struct { > + __le32 length; > + __le32 code; > + } stop_trace; > +}; > + > +/* parameter for command control */ > +struct fjes_device_command_param { > + u32 req_len; > + phys_addr_t req_start; > + u32 res_len; > + phys_addr_t res_start; > + phys_addr_t share_start; > +}; > + > +/* EP buffer information */ > +union ep_buffer_info { > + u8 raw[EP_BUFFER_INFO_SIZE]; > + > + struct _ep_buffer_info_common_t { > + u32 version; > + } common; > + > + struct _ep_buffer_info_v1_t { > + u32 version; > + u32 info_size; > + > + u32 buffer_size; > + u16 count_max; > + > + u16 _rsv_1; > + > + u32 frame_max; > + u8 mac_addr[ETH_ALEN]; > + > + u16 _rsv_2; > + u32 _rsv_3; > + > + u16 tx_status; > + u16 rx_status; > + > + u32 head; > + u32 tail; > + > + u16 vlan_id[EP_BUFFER_SUPPORT_VLAN_MAX]; > + > + } v1i; > + > +}; > + > +/* buffer pair for Extended Partition */ > +struct ep_share_mem_info { > + struct epbuf_handler { > + void *buffer; > + size_t size; > + union ep_buffer_info *info; > + u8 *ring; > + } tx, rx; > + > + struct rtnl_link_stats64 net_stats; > + > + u16 tx_status_work; > + > + u8 es_status; > + u8 zone; > +}; > + > +struct es_device_trace { > + u32 record_num; > + u32 current_record; > + u32 status_flag; > + u32 _rsv; > + > + struct { > + u16 epid; > + u16 dir_offset; > + u32 data; > + u64 tsc; > + } record[]; > +}; > + > +struct fjes_hw_info { > + struct fjes_device_shared_info *share; > + union fjes_device_command_req *req_buf; > + u64 req_buf_size; > + union fjes_device_command_res *res_buf; > + u64 res_buf_size; > + > + int *my_epid; > + int *max_epid; > + > + struct es_device_trace *trace; > + u64 trace_size; > + > + struct mutex lock; /* buffer lock*/ > + > + unsigned long buffer_share_bit; > + unsigned long buffer_unshare_reserve_bit; > +}; > + > +struct fjes_hw { > + void *back; > + > + unsigned long txrx_stop_req_bit; > + unsigned long epstop_req_bit; > + > + int my_epid; > + int max_epid; > + > + struct ep_share_mem_info *ep_shm_info; > + > + struct fjes_hw_resource { > + u64 start; > + u64 size; > + int irq; > + } hw_res; > + > + u8 *base; > + > + struct fjes_hw_info hw_info; > +}; > + > +int fjes_hw_init(struct fjes_hw *); > +int fjes_hw_reset(struct fjes_hw *); > + > +void fjes_hw_init_command_registers(struct fjes_hw *, > + struct fjes_device_command_param *); > +void fjes_hw_setup_epbuf(struct epbuf_handler *, u8 *, u32); > +void fjes_hw_set_irqmask(struct fjes_hw *, enum REG_ICTL_MASK, bool); > + > +#endif /* FJES_HW_H_ */ > diff --git a/drivers/net/fjes/fjes_regs.h b/drivers/net/fjes/fjes_regs.h > new file mode 100644 > index 0000000..4d0e071 > --- /dev/null > +++ b/drivers/net/fjes/fjes_regs.h > @@ -0,0 +1,102 @@ > +/* > + * 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". > + * > + */ > + > +#ifndef FJES_REGS_H_ > +#define FJES_REGS_H_ > + > +#include <linux/bitops.h> > + > +#define XSCT_DEVICE_REGISTER_SIZE 0x1000 > + > +/* register offset */ > +/* Information registers */ > +#define XSCT_OWNER_EPID 0x0000 /* Owner EPID */ > +#define XSCT_MAX_EP 0x0004 /* Maximum EP */ > + > +/* Device Control registers */ > +#define XSCT_DCTL 0x0010 /* Device Control */ > + > +/* Command Control registers */ > +#define XSCT_SHSTSAL 0x0028 /* Share status address Low */ > +#define XSCT_SHSTSAH 0x002C /* Share status address High */ > + > +#define XSCT_REQBL 0x0034 /* Request Buffer length */ > +#define XSCT_REQBAL 0x0038 /* Request Buffer Address Low */ > +#define XSCT_REQBAH 0x003C /* Request Buffer Address High */ > + > +#define XSCT_RESPBL 0x0044 /* Response Buffer Length */ > +#define XSCT_RESPBAL 0x0048 /* Response Buffer Address Low */ > +#define XSCT_RESPBAH 0x004C /* Response Buffer Address High */ > + > +/* Interrupt Control registers */ > +#define XSCT_IMS 0x0084 /* Interrupt mask set */ > +#define XSCT_IMC 0x0088 /* Interrupt mask clear */ > + > +/* register structure */ > +/* Information registers */ > +union REG_OWNER_EPID { > + struct { > + __le32 epid:16; > + __le32:16; > + } bits; > + __le32 reg; > +}; > + > +union REG_MAX_EP { > + struct { > + __le32 maxep:16; > + __le32:16; > + } bits; > + __le32 reg; > +}; > + > +/* Device Control registers */ > +union REG_DCTL { > + struct { > + __le32 reset:1; > + __le32 rsv0:15; > + __le32 rsv1:16; > + } bits; > + __le32 reg; > +}; > + > +enum REG_ICTL_MASK { > + REG_ICTL_MASK_INFO_UPDATE = 1 << 20, > + REG_ICTL_MASK_DEV_STOP_REQ = 1 << 19, > + REG_ICTL_MASK_TXRX_STOP_REQ = 1 << 18, > + REG_ICTL_MASK_TXRX_STOP_DONE = 1 << 17, > + REG_ICTL_MASK_RX_DATA = 1 << 16, > + REG_ICTL_MASK_ALL = GENMASK(20, 16), > +}; > + > +struct fjes_hw; > + > +u32 fjes_hw_rd32(struct fjes_hw *hw, u32 reg); > + > +#define wr32(reg, val) \ > +do { \ > + u8 *base = hw->base; \ > + writel((val), &base[(reg)]); \ > +} while (0) > + > +#define rd32(reg) (fjes_hw_rd32(hw, reg)) > + > +#endif /* FJES_REGS_H_ */ > -- > 1.8.3.1 > -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/net/fjes/Makefile b/drivers/net/fjes/Makefile index 98e59cb..a67f65d8 100644 --- a/drivers/net/fjes/Makefile +++ b/drivers/net/fjes/Makefile @@ -27,5 +27,5 @@ obj-$(CONFIG_FUJITSU_ES) += fjes.o -fjes-objs := fjes_main.o +fjes-objs := fjes_main.o fjes_hw.o diff --git a/drivers/net/fjes/fjes.h b/drivers/net/fjes/fjes.h index 4622da1..15ded96 100644 --- a/drivers/net/fjes/fjes.h +++ b/drivers/net/fjes/fjes.h @@ -28,6 +28,6 @@ extern char fjes_driver_name[]; extern char fjes_driver_version[]; -extern u32 fjes_support_mtu[]; +extern const u32 fjes_support_mtu[]; #endif /* FJES_H_ */ diff --git a/drivers/net/fjes/fjes_hw.c b/drivers/net/fjes/fjes_hw.c new file mode 100644 index 0000000..68ef4d3 --- /dev/null +++ b/drivers/net/fjes/fjes_hw.c @@ -0,0 +1,297 @@ +/* + * 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" + +/* 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; +} + +int fjes_hw_reset(struct fjes_hw *hw) +{ + int timeout; + union REG_DCTL dctl; + + 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 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; +} + +void fjes_hw_setup_epbuf(struct epbuf_handler *epbh, u8 *mac_addr, u32 mtu) +{ + union ep_buffer_info *info = epbh->info; + int i; + u16 vlan_id[EP_BUFFER_SUPPORT_VLAN_MAX]; + + 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) +{ + int epidx; + void *buf; + struct ep_share_mem_info *buf_pair; + size_t mem_size; + int result; + u8 mac[ETH_ALEN] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; + struct fjes_device_command_param param; + + 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(¶m, 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, ¶m); + + return 0; +} + +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); + + 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_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); +} + diff --git a/drivers/net/fjes/fjes_hw.h b/drivers/net/fjes/fjes_hw.h new file mode 100644 index 0000000..6c53f8b --- /dev/null +++ b/drivers/net/fjes/fjes_hw.h @@ -0,0 +1,250 @@ +/* + * 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". + * + */ + +#ifndef FJES_HW_H_ +#define FJES_HW_H_ + +#include <linux/netdevice.h> +#include <linux/if_vlan.h> + +#include "fjes_regs.h" + +struct fjes_hw; + +#define EP_BUFFER_SUPPORT_VLAN_MAX 4 +#define EP_BUFFER_INFO_SIZE 4096 + +#define FJES_DEVICE_RESET_TIMEOUT ((17 + 1) * 3) /* sec */ + +#define EP_BUFFER_SIZE \ + (((sizeof(union ep_buffer_info) + (128 * (64 * 1024))) \ + / EP_BUFFER_INFO_SIZE) * EP_BUFFER_INFO_SIZE) + +#define EP_RING_NUM(buffer_size, frame_size) \ + (u32)((buffer_size) / (frame_size)) + +#define FJES_MTU_TO_BUFFER_SIZE(mtu) \ + (ETH_HLEN + VLAN_HLEN + (mtu) + ETH_FCS_LEN) +#define FJES_MTU_TO_FRAME_SIZE(mtu) \ + (sizeof(struct esmem_frame) + FJES_MTU_TO_BUFFER_SIZE(mtu)) +#define FJES_MTU_DEFINE(size) \ + ((size) - sizeof(struct esmem_frame) - \ + (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN)) + +#define FJES_DEV_COMMAND_INFO_RES_LEN(epnum) (8 + 2 * (epnum)) +#define FJES_DEV_COMMAND_SHARE_BUFFER_REQ_LEN(txb, rxb) \ + (24 + (8 * ((txb) / EP_BUFFER_INFO_SIZE + (rxb) / EP_BUFFER_INFO_SIZE))) + +#define FJES_DEV_REQ_BUF_SIZE(maxep) \ + FJES_DEV_COMMAND_SHARE_BUFFER_REQ_LEN(EP_BUFFER_SIZE, EP_BUFFER_SIZE) +#define FJES_DEV_RES_BUF_SIZE(maxep) \ + FJES_DEV_COMMAND_INFO_RES_LEN(maxep) + +/* Frame & MTU */ +struct esmem_frame { + __le32 frame_size; + u8 frame_data[]; +}; + +/* shared status region */ +struct fjes_device_shared_info { + int epnum; + u8 ep_status[]; +}; + +/* structures for command control request data*/ +union fjes_device_command_req { + struct { + __le32 length; + } info; + struct { + __le32 length; + __le32 epid; + __le64 buffer[]; + } share_buffer; + struct { + __le32 length; + __le32 epid; + } unshare_buffer; + struct { + __le32 length; + __le32 mode; + __le64 buffer_len; + __le64 buffer[]; + } start_trace; + struct { + __le32 length; + } stop_trace; +}; + +/* structures for command control response data */ +union fjes_device_command_res { + struct { + __le32 length; + __le32 code; + struct { + u8 es_status; + u8 zone; + } info[]; + } info; + struct { + __le32 length; + __le32 code; + } share_buffer; + struct { + __le32 length; + __le32 code; + } unshare_buffer; + struct { + __le32 length; + __le32 code; + } start_trace; + struct { + __le32 length; + __le32 code; + } stop_trace; +}; + +/* parameter for command control */ +struct fjes_device_command_param { + u32 req_len; + phys_addr_t req_start; + u32 res_len; + phys_addr_t res_start; + phys_addr_t share_start; +}; + +/* EP buffer information */ +union ep_buffer_info { + u8 raw[EP_BUFFER_INFO_SIZE]; + + struct _ep_buffer_info_common_t { + u32 version; + } common; + + struct _ep_buffer_info_v1_t { + u32 version; + u32 info_size; + + u32 buffer_size; + u16 count_max; + + u16 _rsv_1; + + u32 frame_max; + u8 mac_addr[ETH_ALEN]; + + u16 _rsv_2; + u32 _rsv_3; + + u16 tx_status; + u16 rx_status; + + u32 head; + u32 tail; + + u16 vlan_id[EP_BUFFER_SUPPORT_VLAN_MAX]; + + } v1i; + +}; + +/* buffer pair for Extended Partition */ +struct ep_share_mem_info { + struct epbuf_handler { + void *buffer; + size_t size; + union ep_buffer_info *info; + u8 *ring; + } tx, rx; + + struct rtnl_link_stats64 net_stats; + + u16 tx_status_work; + + u8 es_status; + u8 zone; +}; + +struct es_device_trace { + u32 record_num; + u32 current_record; + u32 status_flag; + u32 _rsv; + + struct { + u16 epid; + u16 dir_offset; + u32 data; + u64 tsc; + } record[]; +}; + +struct fjes_hw_info { + struct fjes_device_shared_info *share; + union fjes_device_command_req *req_buf; + u64 req_buf_size; + union fjes_device_command_res *res_buf; + u64 res_buf_size; + + int *my_epid; + int *max_epid; + + struct es_device_trace *trace; + u64 trace_size; + + struct mutex lock; /* buffer lock*/ + + unsigned long buffer_share_bit; + unsigned long buffer_unshare_reserve_bit; +}; + +struct fjes_hw { + void *back; + + unsigned long txrx_stop_req_bit; + unsigned long epstop_req_bit; + + int my_epid; + int max_epid; + + struct ep_share_mem_info *ep_shm_info; + + struct fjes_hw_resource { + u64 start; + u64 size; + int irq; + } hw_res; + + u8 *base; + + struct fjes_hw_info hw_info; +}; + +int fjes_hw_init(struct fjes_hw *); +int fjes_hw_reset(struct fjes_hw *); + +void fjes_hw_init_command_registers(struct fjes_hw *, + struct fjes_device_command_param *); +void fjes_hw_setup_epbuf(struct epbuf_handler *, u8 *, u32); +void fjes_hw_set_irqmask(struct fjes_hw *, enum REG_ICTL_MASK, bool); + +#endif /* FJES_HW_H_ */ diff --git a/drivers/net/fjes/fjes_regs.h b/drivers/net/fjes/fjes_regs.h new file mode 100644 index 0000000..4d0e071 --- /dev/null +++ b/drivers/net/fjes/fjes_regs.h @@ -0,0 +1,102 @@ +/* + * 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". + * + */ + +#ifndef FJES_REGS_H_ +#define FJES_REGS_H_ + +#include <linux/bitops.h> + +#define XSCT_DEVICE_REGISTER_SIZE 0x1000 + +/* register offset */ +/* Information registers */ +#define XSCT_OWNER_EPID 0x0000 /* Owner EPID */ +#define XSCT_MAX_EP 0x0004 /* Maximum EP */ + +/* Device Control registers */ +#define XSCT_DCTL 0x0010 /* Device Control */ + +/* Command Control registers */ +#define XSCT_SHSTSAL 0x0028 /* Share status address Low */ +#define XSCT_SHSTSAH 0x002C /* Share status address High */ + +#define XSCT_REQBL 0x0034 /* Request Buffer length */ +#define XSCT_REQBAL 0x0038 /* Request Buffer Address Low */ +#define XSCT_REQBAH 0x003C /* Request Buffer Address High */ + +#define XSCT_RESPBL 0x0044 /* Response Buffer Length */ +#define XSCT_RESPBAL 0x0048 /* Response Buffer Address Low */ +#define XSCT_RESPBAH 0x004C /* Response Buffer Address High */ + +/* Interrupt Control registers */ +#define XSCT_IMS 0x0084 /* Interrupt mask set */ +#define XSCT_IMC 0x0088 /* Interrupt mask clear */ + +/* register structure */ +/* Information registers */ +union REG_OWNER_EPID { + struct { + __le32 epid:16; + __le32:16; + } bits; + __le32 reg; +}; + +union REG_MAX_EP { + struct { + __le32 maxep:16; + __le32:16; + } bits; + __le32 reg; +}; + +/* Device Control registers */ +union REG_DCTL { + struct { + __le32 reset:1; + __le32 rsv0:15; + __le32 rsv1:16; + } bits; + __le32 reg; +}; + +enum REG_ICTL_MASK { + REG_ICTL_MASK_INFO_UPDATE = 1 << 20, + REG_ICTL_MASK_DEV_STOP_REQ = 1 << 19, + REG_ICTL_MASK_TXRX_STOP_REQ = 1 << 18, + REG_ICTL_MASK_TXRX_STOP_DONE = 1 << 17, + REG_ICTL_MASK_RX_DATA = 1 << 16, + REG_ICTL_MASK_ALL = GENMASK(20, 16), +}; + +struct fjes_hw; + +u32 fjes_hw_rd32(struct fjes_hw *hw, u32 reg); + +#define wr32(reg, val) \ +do { \ + u8 *base = hw->base; \ + writel((val), &base[(reg)]); \ +} while (0) + +#define rd32(reg) (fjes_hw_rd32(hw, reg)) + +#endif /* FJES_REGS_H_ */
This patch adds hardware initialization routine to be invoked at driver's .probe routine. Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com> --- drivers/net/fjes/Makefile | 2 +- drivers/net/fjes/fjes.h | 2 +- drivers/net/fjes/fjes_hw.c | 297 +++++++++++++++++++++++++++++++++++++++++++ drivers/net/fjes/fjes_hw.h | 250 ++++++++++++++++++++++++++++++++++++ drivers/net/fjes/fjes_regs.h | 102 +++++++++++++++ 5 files changed, 651 insertions(+), 2 deletions(-) create mode 100644 drivers/net/fjes/fjes_hw.c create mode 100644 drivers/net/fjes/fjes_hw.h create mode 100644 drivers/net/fjes/fjes_regs.h