From e5d486dcaa45dd365970c09395ae24df5a0e3f77 Mon Sep 17 00:00:00 2001 From: Taku Izumi Date: Fri, 21 Aug 2015 17:29:23 +0900 Subject: [PATCH] fjes: net_device_ops.ndo_open and .ndo_stop This patch adds net_device_ops.ndo_open and .ndo_stop callback. These function is called when network device activation and deactivation. Signed-off-by: Taku Izumi Signed-off-by: David S. Miller --- drivers/net/fjes/fjes.h | 1 + drivers/net/fjes/fjes_hw.c | 145 +++++++++++++++++++++ drivers/net/fjes/fjes_hw.h | 30 +++++ drivers/net/fjes/fjes_main.c | 246 +++++++++++++++++++++++++++++++++++ drivers/net/fjes/fjes_regs.h | 17 +++ 5 files changed, 439 insertions(+) diff --git a/drivers/net/fjes/fjes.h b/drivers/net/fjes/fjes.h index 54bc189a997c..f182ed3a4cd1 100644 --- a/drivers/net/fjes/fjes.h +++ b/drivers/net/fjes/fjes.h @@ -29,6 +29,7 @@ #define FJES_ACPI_SYMBOL "Extended Socket" #define FJES_MAX_QUEUES 1 #define FJES_TX_RETRY_INTERVAL (20 * HZ) +#define FJES_OPEN_ZONE_UPDATE_WAIT (300) /* msec */ /* board specific private data structure */ struct fjes_adapter { diff --git a/drivers/net/fjes/fjes_hw.c b/drivers/net/fjes/fjes_hw.c index 1e807dfc548a..1935f48e9e43 100644 --- a/drivers/net/fjes/fjes_hw.c +++ b/drivers/net/fjes/fjes_hw.c @@ -638,6 +638,25 @@ int fjes_hw_unregister_buff_addr(struct fjes_hw *hw, int dest_epid) 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) { @@ -646,3 +665,129 @@ void fjes_hw_set_irqmask(struct fjes_hw *hw, 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; +} diff --git a/drivers/net/fjes/fjes_hw.h b/drivers/net/fjes/fjes_hw.h index 2e750e9655ef..9b8df553f730 100644 --- a/drivers/net/fjes/fjes_hw.h +++ b/drivers/net/fjes/fjes_hw.h @@ -36,6 +36,7 @@ struct fjes_hw; #define FJES_DEVICE_RESET_TIMEOUT ((17 + 1) * 3) /* sec */ #define FJES_COMMAND_REQ_TIMEOUT (5 + 1) /* sec */ #define FJES_COMMAND_REQ_BUFF_TIMEOUT (8 * 3) /* sec */ +#define FJES_COMMAND_EPSTOP_WAIT_TIMEOUT (1) /* sec */ #define FJES_CMD_REQ_ERR_INFO_PARAM (0x0001) #define FJES_CMD_REQ_ERR_INFO_STATUS (0x0002) @@ -43,6 +44,17 @@ struct fjes_hw; #define FJES_CMD_REQ_RES_CODE_NORMAL (0) #define FJES_CMD_REQ_RES_CODE_BUSY (1) +#define FJES_ZONING_STATUS_DISABLE (0x00) +#define FJES_ZONING_STATUS_ENABLE (0x01) +#define FJES_ZONING_STATUS_INVALID (0xFF) + +#define FJES_ZONING_ZONE_TYPE_NONE (0xFF) + +#define FJES_RX_STOP_REQ_NONE (0x0) +#define FJES_RX_STOP_REQ_DONE (0x1) +#define FJES_RX_STOP_REQ_REQUEST (0x2) +#define FJES_RX_POLL_WORK (0x4) + #define EP_BUFFER_SIZE \ (((sizeof(union ep_buffer_info) + (128 * (64 * 1024))) \ / EP_BUFFER_INFO_SIZE) * EP_BUFFER_INFO_SIZE) @@ -77,6 +89,15 @@ struct esmem_frame { u8 frame_data[]; }; +/* EP partner status */ +enum ep_partner_status { + EP_PARTNER_UNSHARE, + EP_PARTNER_SHARED, + EP_PARTNER_WAITING, + EP_PARTNER_COMPLETE, + EP_PARTNER_STATUS_MAX, +}; + /* shared status region */ struct fjes_device_shared_info { int epnum; @@ -278,6 +299,15 @@ int fjes_hw_unregister_buff_addr(struct fjes_hw *, int); void fjes_hw_init_command_registers(struct fjes_hw *, struct fjes_device_command_param *); void fjes_hw_setup_epbuf(struct epbuf_handler *, u8 *, u32); +int fjes_hw_raise_interrupt(struct fjes_hw *, int, enum REG_ICTL_MASK); void fjes_hw_set_irqmask(struct fjes_hw *, enum REG_ICTL_MASK, bool); +u32 fjes_hw_capture_interrupt_status(struct fjes_hw *); +void fjes_hw_raise_epstop(struct fjes_hw *); +int fjes_hw_wait_epstop(struct fjes_hw *); +enum ep_partner_status + fjes_hw_get_partner_ep_status(struct fjes_hw *, int); + +bool fjes_hw_epid_is_same_zone(struct fjes_hw *, int); +int fjes_hw_epid_is_shared(struct fjes_device_shared_info *, int); #endif /* FJES_HW_H_ */ diff --git a/drivers/net/fjes/fjes_main.c b/drivers/net/fjes/fjes_main.c index 45a8b9c52ae5..bd50cbd6915f 100644 --- a/drivers/net/fjes/fjes_main.c +++ b/drivers/net/fjes/fjes_main.c @@ -24,6 +24,7 @@ #include #include #include +#include #include "fjes.h" @@ -43,6 +44,15 @@ MODULE_DESCRIPTION("FUJITSU Extended Socket Network Device Driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); +static int fjes_request_irq(struct fjes_adapter *); +static void fjes_free_irq(struct fjes_adapter *); + +static int fjes_open(struct net_device *); +static int fjes_close(struct net_device *); +static int fjes_setup_resources(struct fjes_adapter *); +static void fjes_free_resources(struct fjes_adapter *); +static irqreturn_t fjes_intr(int, void*); + static int fjes_acpi_add(struct acpi_device *); static int fjes_acpi_remove(struct acpi_device *); static acpi_status fjes_get_acpi_resource(struct acpi_resource *, void*); @@ -170,9 +180,245 @@ fjes_get_acpi_resource(struct acpi_resource *acpi_res, void *data) return AE_OK; } +static int fjes_request_irq(struct fjes_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + int result = -1; + + if (!adapter->irq_registered) { + result = request_irq(adapter->hw.hw_res.irq, fjes_intr, + IRQF_SHARED, netdev->name, adapter); + if (result) + adapter->irq_registered = false; + else + adapter->irq_registered = true; + } + + return result; +} + +static void fjes_free_irq(struct fjes_adapter *adapter) +{ + struct fjes_hw *hw = &adapter->hw; + + fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, true); + + if (adapter->irq_registered) { + free_irq(adapter->hw.hw_res.irq, adapter); + adapter->irq_registered = false; + } +} + static const struct net_device_ops fjes_netdev_ops = { + .ndo_open = fjes_open, + .ndo_stop = fjes_close, }; +/* fjes_open - Called when a network interface is made active */ +static int fjes_open(struct net_device *netdev) +{ + struct fjes_adapter *adapter = netdev_priv(netdev); + struct fjes_hw *hw = &adapter->hw; + int result; + + if (adapter->open_guard) + return -ENXIO; + + result = fjes_setup_resources(adapter); + if (result) + goto err_setup_res; + + hw->txrx_stop_req_bit = 0; + hw->epstop_req_bit = 0; + + fjes_hw_capture_interrupt_status(hw); + + result = fjes_request_irq(adapter); + if (result) + goto err_req_irq; + + fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, false); + + netif_tx_start_all_queues(netdev); + netif_carrier_on(netdev); + + return 0; + +err_req_irq: + fjes_free_irq(adapter); + +err_setup_res: + fjes_free_resources(adapter); + return result; +} + +/* fjes_close - Disables a network interface */ +static int fjes_close(struct net_device *netdev) +{ + struct fjes_adapter *adapter = netdev_priv(netdev); + struct fjes_hw *hw = &adapter->hw; + int epidx; + + netif_tx_stop_all_queues(netdev); + netif_carrier_off(netdev); + + fjes_hw_raise_epstop(hw); + + for (epidx = 0; epidx < hw->max_epid; epidx++) { + if (epidx == hw->my_epid) + continue; + + adapter->hw.ep_shm_info[epidx].tx.info->v1i.rx_status &= + ~FJES_RX_POLL_WORK; + } + + fjes_free_irq(adapter); + + fjes_hw_wait_epstop(hw); + + fjes_free_resources(adapter); + + return 0; +} + +static int fjes_setup_resources(struct fjes_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + struct ep_share_mem_info *buf_pair; + struct fjes_hw *hw = &adapter->hw; + int result; + int epidx; + + mutex_lock(&hw->hw_info.lock); + result = fjes_hw_request_info(hw); + switch (result) { + case 0: + for (epidx = 0; epidx < hw->max_epid; epidx++) { + hw->ep_shm_info[epidx].es_status = + hw->hw_info.res_buf->info.info[epidx].es_status; + hw->ep_shm_info[epidx].zone = + hw->hw_info.res_buf->info.info[epidx].zone; + } + break; + default: + case -ENOMSG: + case -EBUSY: + adapter->force_reset = true; + + mutex_unlock(&hw->hw_info.lock); + return result; + } + mutex_unlock(&hw->hw_info.lock); + + for (epidx = 0; epidx < (hw->max_epid); epidx++) { + if ((epidx != hw->my_epid) && + (hw->ep_shm_info[epidx].es_status == + FJES_ZONING_STATUS_ENABLE)) { + fjes_hw_raise_interrupt(hw, epidx, + REG_ICTL_MASK_INFO_UPDATE); + } + } + + msleep(FJES_OPEN_ZONE_UPDATE_WAIT * hw->max_epid); + + for (epidx = 0; epidx < (hw->max_epid); epidx++) { + if (epidx == hw->my_epid) + continue; + + buf_pair = &hw->ep_shm_info[epidx]; + + fjes_hw_setup_epbuf(&buf_pair->tx, netdev->dev_addr, + netdev->mtu); + + if (fjes_hw_epid_is_same_zone(hw, epidx)) { + mutex_lock(&hw->hw_info.lock); + result = + fjes_hw_register_buff_addr(hw, epidx, buf_pair); + mutex_unlock(&hw->hw_info.lock); + + switch (result) { + case 0: + break; + case -ENOMSG: + case -EBUSY: + default: + adapter->force_reset = true; + return result; + } + } + } + + return 0; +} + +static void fjes_free_resources(struct fjes_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + struct fjes_device_command_param param; + struct ep_share_mem_info *buf_pair; + struct fjes_hw *hw = &adapter->hw; + bool reset_flag = false; + int result; + int epidx; + + for (epidx = 0; epidx < hw->max_epid; epidx++) { + if (epidx == hw->my_epid) + continue; + + mutex_lock(&hw->hw_info.lock); + result = fjes_hw_unregister_buff_addr(hw, epidx); + mutex_unlock(&hw->hw_info.lock); + + if (result) + reset_flag = true; + + buf_pair = &hw->ep_shm_info[epidx]; + + fjes_hw_setup_epbuf(&buf_pair->tx, + netdev->dev_addr, netdev->mtu); + + clear_bit(epidx, &hw->txrx_stop_req_bit); + } + + if (reset_flag || adapter->force_reset) { + result = fjes_hw_reset(hw); + + adapter->force_reset = false; + + if (result) + adapter->open_guard = true; + + hw->hw_info.buffer_share_bit = 0; + + memset((void *)¶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); + } +} + +static irqreturn_t fjes_intr(int irq, void *data) +{ + struct fjes_adapter *adapter = data; + struct fjes_hw *hw = &adapter->hw; + irqreturn_t ret; + u32 icr; + + icr = fjes_hw_capture_interrupt_status(hw); + + if (icr & REG_IS_MASK_IS_ASSERT) + ret = IRQ_HANDLED; + else + ret = IRQ_NONE; + + return ret; +} + /* fjes_probe - Device Initialization Routine */ static int fjes_probe(struct platform_device *plat_dev) { diff --git a/drivers/net/fjes/fjes_regs.h b/drivers/net/fjes/fjes_regs.h index cc975a0fd111..029c924dc175 100644 --- a/drivers/net/fjes/fjes_regs.h +++ b/drivers/net/fjes/fjes_regs.h @@ -49,8 +49,11 @@ #define XSCT_RESPBAH 0x004C /* Response Buffer Address High */ /* Interrupt Control registers */ +#define XSCT_IS 0x0080 /* Interrupt status */ #define XSCT_IMS 0x0084 /* Interrupt mask set */ #define XSCT_IMC 0x0088 /* Interrupt mask clear */ +#define XSCT_IG 0x008C /* Interrupt generator */ +#define XSCT_ICTL 0x0090 /* Interrupt control */ /* register structure */ /* Information registers */ @@ -101,6 +104,15 @@ union REG_CS { __le32 reg; }; +/* Interrupt Control registers */ +union REG_ICTL { + struct { + __le32 automak:1; + __le32 rsv0:31; + } bits; + __le32 reg; +}; + enum REG_ICTL_MASK { REG_ICTL_MASK_INFO_UPDATE = 1 << 20, REG_ICTL_MASK_DEV_STOP_REQ = 1 << 19, @@ -110,6 +122,11 @@ enum REG_ICTL_MASK { REG_ICTL_MASK_ALL = GENMASK(20, 16), }; +enum REG_IS_MASK { + REG_IS_MASK_IS_ASSERT = 1 << 31, + REG_IS_MASK_EPID = GENMASK(15, 0), +}; + struct fjes_hw; u32 fjes_hw_rd32(struct fjes_hw *hw, u32 reg); -- GitLab