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Message-Id: <1440145778-15941-7-git-send-email-izumi.taku@jp.fujitsu.com>
Date: Fri, 21 Aug 2015 17:29:23 +0900
From: Taku Izumi <izumi.taku@...fujitsu.com>
To: netdev@...r.kernel.org, davem@...emloft.net
Cc: platform-driver-x86@...r.kernel.org, dvhart@...radead.org,
rkhan@...hat.com, alexander.h.duyck@...hat.com,
linux-acpi@...r.kernel.org, joe@...ches.com,
sergei.shtylyov@...entembedded.com, stephen@...workplumber.org,
yasu.isimatu@...il.com, Taku Izumi <izumi.taku@...fujitsu.com>
Subject: [PATCH v3 07/22] 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 <izumi.taku@...fujitsu.com>
---
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 54bc189..f182ed3 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 1e807df..1935f48 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 2e750e9..9b8df55 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 45a8b9c..bd50cbd 100644
--- a/drivers/net/fjes/fjes_main.c
+++ b/drivers/net/fjes/fjes_main.c
@@ -24,6 +24,7 @@
#include <linux/nls.h>
#include <linux/platform_device.h>
#include <linux/netdevice.h>
+#include <linux/interrupt.h>
#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 cc975a0..029c924 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);
--
1.8.3.1
--
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