[PATCH v2 12/21] ipmi: kcs_bmc: Strip private client data from struct kcs_bmc

Andrew Jeffery
2021-03-19T06:30:16Z

Move all client-private data out of `struct kcs_bmc` into the KCS client
implementation.

With this change the KCS BMC core code now only concerns itself with
abstract `struct kcs_bmc` and `struct kcs_bmc_client` types, achieving
expected separation of concerns. Further, the change clears the path for
implementation of alternative userspace interfaces.

The chardev data-structures are rearranged in the same manner applied to
the KCS device driver data-structures in an earlier patch - `struct
kcs_bmc_client` is embedded in the client's private data and we exploit
container_of() to translate as required.

Finally, now that it is free of client data, `struct kcs_bmc` is renamed
to `struct kcs_bmc_device` to contrast `struct kcs_bmc_client`.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
---
drivers/char/ipmi/kcs_bmc.c | 68 +++-
drivers/char/ipmi/kcs_bmc.h | 86 +-----
drivers/char/ipmi/kcs_bmc_aspeed.c | 22 +-
drivers/char/ipmi/kcs_bmc_cdev_ipmi.c | 428 ++++++++++++++++----------
drivers/char/ipmi/kcs_bmc_client.h | 28 +-
drivers/char/ipmi/kcs_bmc_device.h | 12 +-
drivers/char/ipmi/kcs_bmc_npcm7xx.c | 20 +-
7 files changed, 368 insertions(+), 296 deletions(-)

diff --git a/drivers/char/ipmi/kcs_bmc.c b/drivers/char/ipmi/kcs_bmc.c
index 1046ce2bbefc..266ebec71d6f 100644
--- a/drivers/char/ipmi/kcs_bmc.c
+++ b/drivers/char/ipmi/kcs_bmc.c
@@ -4,6 +4,7 @@
* Copyright (c) 2021, IBM Corp.
*/

+#include <linux/device.h>
#include <linux/module.h>

#include "kcs_bmc.h"
@@ -14,51 +15,96 @@

/* Consumer data access */

-u8 kcs_bmc_read_data(struct kcs_bmc *kcs_bmc)
+u8 kcs_bmc_read_data(struct kcs_bmc_device *kcs_bmc)
{
return kcs_bmc->ops->io_inputb(kcs_bmc, kcs_bmc->ioreg.idr);
}
EXPORT_SYMBOL(kcs_bmc_read_data);

-void kcs_bmc_write_data(struct kcs_bmc *kcs_bmc, u8 data)
+void kcs_bmc_write_data(struct kcs_bmc_device *kcs_bmc, u8 data)
{
kcs_bmc->ops->io_outputb(kcs_bmc, kcs_bmc->ioreg.odr, data);
}
EXPORT_SYMBOL(kcs_bmc_write_data);

-u8 kcs_bmc_read_status(struct kcs_bmc *kcs_bmc)
+u8 kcs_bmc_read_status(struct kcs_bmc_device *kcs_bmc)
{
return kcs_bmc->ops->io_inputb(kcs_bmc, kcs_bmc->ioreg.str);
}
EXPORT_SYMBOL(kcs_bmc_read_status);

-void kcs_bmc_write_status(struct kcs_bmc *kcs_bmc, u8 data)
+void kcs_bmc_write_status(struct kcs_bmc_device *kcs_bmc, u8 data)
{
kcs_bmc->ops->io_outputb(kcs_bmc, kcs_bmc->ioreg.str, data);
}
EXPORT_SYMBOL(kcs_bmc_write_status);

-void kcs_bmc_update_status(struct kcs_bmc *kcs_bmc, u8 mask, u8 val)
+void kcs_bmc_update_status(struct kcs_bmc_device *kcs_bmc, u8 mask, u8 val)
{
kcs_bmc->ops->io_updateb(kcs_bmc, kcs_bmc->ioreg.str, mask, val);
}
EXPORT_SYMBOL(kcs_bmc_update_status);

-int kcs_bmc_handle_event(struct kcs_bmc *kcs_bmc)
+int kcs_bmc_handle_event(struct kcs_bmc_device *kcs_bmc)
{
- return kcs_bmc->client.ops->event(&kcs_bmc->client);
+ struct kcs_bmc_client *client;
+ int rc;
+
+ spin_lock(&kcs_bmc->lock);
+ client = kcs_bmc->client;
+ if (client) {
+ rc = client->ops->event(client);
+ } else {
+ u8 status;
+
+ status = kcs_bmc_read_status(kcs_bmc);
+ if (status & KCS_BMC_STR_IBF) {
+ /* Ack the event by reading the data */
+ kcs_bmc_read_data(kcs_bmc);
+ rc = KCS_BMC_EVENT_HANDLED;
+ } else {
+ rc = KCS_BMC_EVENT_NONE;
+ }
+ }
+ spin_unlock(&kcs_bmc->lock);
+
+ return rc;
}
EXPORT_SYMBOL(kcs_bmc_handle_event);

-int kcs_bmc_ipmi_attach_cdev(struct kcs_bmc *kcs_bmc);
-int kcs_bmc_add_device(struct kcs_bmc *kcs_bmc)
+int kcs_bmc_enable_device(struct kcs_bmc_device *kcs_bmc, struct kcs_bmc_client *client)
+{
+ int rc;
+
+ spin_lock_irq(&kcs_bmc->lock);
+ if (kcs_bmc->client) {
+ rc = -EBUSY;
+ } else {
+ kcs_bmc->client = client;
+ rc = 0;
+ }
+ spin_unlock_irq(&kcs_bmc->lock);
+
+ return rc;
+}
+EXPORT_SYMBOL(kcs_bmc_enable_device);
+
+void kcs_bmc_disable_device(struct kcs_bmc_device *kcs_bmc, struct kcs_bmc_client *client)
+{
+ spin_lock_irq(&kcs_bmc->lock);
+ if (client == kcs_bmc->client)
+ kcs_bmc->client = NULL;
+ spin_unlock_irq(&kcs_bmc->lock);
+}
+EXPORT_SYMBOL(kcs_bmc_disable_device);
+
+int kcs_bmc_add_device(struct kcs_bmc_device *kcs_bmc)
{
return kcs_bmc_ipmi_attach_cdev(kcs_bmc);
}
EXPORT_SYMBOL(kcs_bmc_add_device);

-int kcs_bmc_ipmi_detach_cdev(struct kcs_bmc *kcs_bmc);
-int kcs_bmc_remove_device(struct kcs_bmc *kcs_bmc)
+int kcs_bmc_remove_device(struct kcs_bmc_device *kcs_bmc)
{
return kcs_bmc_ipmi_detach_cdev(kcs_bmc);
}
diff --git a/drivers/char/ipmi/kcs_bmc.h b/drivers/char/ipmi/kcs_bmc.h
index a1350e567723..3f266740c759 100644
--- a/drivers/char/ipmi/kcs_bmc.h
+++ b/drivers/char/ipmi/kcs_bmc.h
@@ -6,9 +6,7 @@
#ifndef __KCS_BMC_H__
#define __KCS_BMC_H__

-#include <linux/miscdevice.h>
-
-#include "kcs_bmc_client.h"
+#include <linux/list.h>

#define KCS_BMC_EVENT_NONE 0
#define KCS_BMC_EVENT_HANDLED 1
@@ -17,53 +15,6 @@
#define KCS_BMC_STR_IBF BIT(1)
#define KCS_BMC_STR_CMD_DAT BIT(3)

-/* Different phases of the KCS BMC module.
- * KCS_PHASE_IDLE:
- * BMC should not be expecting nor sending any data.
- * KCS_PHASE_WRITE_START:
- * BMC is receiving a WRITE_START command from system software.
- * KCS_PHASE_WRITE_DATA:
- * BMC is receiving a data byte from system software.
- * KCS_PHASE_WRITE_END_CMD:
- * BMC is waiting a last data byte from system software.
- * KCS_PHASE_WRITE_DONE:
- * BMC has received the whole request from system software.
- * KCS_PHASE_WAIT_READ:
- * BMC is waiting the response from the upper IPMI service.
- * KCS_PHASE_READ:
- * BMC is transferring the response to system software.
- * KCS_PHASE_ABORT_ERROR1:
- * BMC is waiting error status request from system software.
- * KCS_PHASE_ABORT_ERROR2:
- * BMC is waiting for idle status afer error from system software.
- * KCS_PHASE_ERROR:
- * BMC has detected a protocol violation at the interface level.
- */
-enum kcs_phases {
- KCS_PHASE_IDLE,
-
- KCS_PHASE_WRITE_START,
- KCS_PHASE_WRITE_DATA,
- KCS_PHASE_WRITE_END_CMD,
- KCS_PHASE_WRITE_DONE,
-
- KCS_PHASE_WAIT_READ,
- KCS_PHASE_READ,
-
- KCS_PHASE_ABORT_ERROR1,
- KCS_PHASE_ABORT_ERROR2,
- KCS_PHASE_ERROR
-};
-
-/* IPMI 2.0 - Table 9-4, KCS Interface Status Codes */
-enum kcs_errors {
- KCS_NO_ERROR = 0x00,
- KCS_ABORTED_BY_COMMAND = 0x01,
- KCS_ILLEGAL_CONTROL_CODE = 0x02,
- KCS_LENGTH_ERROR = 0x06,
- KCS_UNSPECIFIED_ERROR = 0xFF
-};
-
/* IPMI 2.0 - 9.5, KCS Interface Registers
* @idr: Input Data Register
* @odr: Output Data Register
@@ -76,36 +27,23 @@ struct kcs_ioreg {
};

struct kcs_bmc_device_ops;
+struct kcs_bmc_client;
+
+struct kcs_bmc_device {
+ struct list_head entry;

-struct kcs_bmc {
struct device *dev;
-
- const struct kcs_bmc_device_ops *ops;
-
- struct kcs_bmc_client client;
-
- spinlock_t lock;
-
u32 channel;
- int running;

struct kcs_ioreg ioreg;

- enum kcs_phases phase;
- enum kcs_errors error;
+ const struct kcs_bmc_device_ops *ops;

- wait_queue_head_t queue;
- bool data_in_avail;
- int data_in_idx;
- u8 *data_in;
-
- int data_out_idx;
- int data_out_len;
- u8 *data_out;
-
- struct mutex mutex;
- u8 *kbuffer;
-
- struct miscdevice miscdev;
+ spinlock_t lock;
+ struct kcs_bmc_client *client;
};
+
+/* Temporary exports while refactoring */
+int kcs_bmc_ipmi_attach_cdev(struct kcs_bmc_device *kcs_bmc);
+int kcs_bmc_ipmi_detach_cdev(struct kcs_bmc_device *kcs_bmc);
#endif /* __KCS_BMC_H__ */
diff --git a/drivers/char/ipmi/kcs_bmc_aspeed.c b/drivers/char/ipmi/kcs_bmc_aspeed.c
index 1b313355b1c8..6f26e7366c0b 100644
--- a/drivers/char/ipmi/kcs_bmc_aspeed.c
+++ b/drivers/char/ipmi/kcs_bmc_aspeed.c
@@ -61,7 +61,7 @@
#define LPC_STR4 0x11C

struct aspeed_kcs_bmc {
- struct kcs_bmc kcs_bmc;
+ struct kcs_bmc_device kcs_bmc;

struct regmap *map;
};
@@ -71,12 +71,12 @@ struct aspeed_kcs_of_ops {
int (*get_io_address)(struct platform_device *pdev);
};

-static inline struct aspeed_kcs_bmc *to_aspeed_kcs_bmc(struct kcs_bmc *kcs_bmc)
+static inline struct aspeed_kcs_bmc *to_aspeed_kcs_bmc(struct kcs_bmc_device *kcs_bmc)
{
return container_of(kcs_bmc, struct aspeed_kcs_bmc, kcs_bmc);
}

-static u8 aspeed_kcs_inb(struct kcs_bmc *kcs_bmc, u32 reg)
+static u8 aspeed_kcs_inb(struct kcs_bmc_device *kcs_bmc, u32 reg)
{
struct aspeed_kcs_bmc *priv = to_aspeed_kcs_bmc(kcs_bmc);
u32 val = 0;
@@ -88,7 +88,7 @@ static u8 aspeed_kcs_inb(struct kcs_bmc *kcs_bmc, u32 reg)
return rc == 0 ? (u8) val : 0;
}

-static void aspeed_kcs_outb(struct kcs_bmc *kcs_bmc, u32 reg, u8 data)
+static void aspeed_kcs_outb(struct kcs_bmc_device *kcs_bmc, u32 reg, u8 data)
{
struct aspeed_kcs_bmc *priv = to_aspeed_kcs_bmc(kcs_bmc);
int rc;
@@ -97,7 +97,7 @@ static void aspeed_kcs_outb(struct kcs_bmc *kcs_bmc, u32 reg, u8 data)
WARN(rc != 0, "regmap_write() failed: %d\n", rc);
}

-static void aspeed_kcs_updateb(struct kcs_bmc *kcs_bmc, u32 reg, u8 mask, u8 val)
+static void aspeed_kcs_updateb(struct kcs_bmc_device *kcs_bmc, u32 reg, u8 mask, u8 val)
{
struct aspeed_kcs_bmc *priv = to_aspeed_kcs_bmc(kcs_bmc);
int rc;
@@ -119,7 +119,7 @@ static void aspeed_kcs_updateb(struct kcs_bmc *kcs_bmc, u32 reg, u8 mask, u8 val
* C. KCS4
* D / C : CA4h / CA5h
*/
-static void aspeed_kcs_set_address(struct kcs_bmc *kcs_bmc, u16 addr)
+static void aspeed_kcs_set_address(struct kcs_bmc_device *kcs_bmc, u16 addr)
{
struct aspeed_kcs_bmc *priv = to_aspeed_kcs_bmc(kcs_bmc);

@@ -153,7 +153,7 @@ static void aspeed_kcs_set_address(struct kcs_bmc *kcs_bmc, u16 addr)
}
}

-static void aspeed_kcs_enable_channel(struct kcs_bmc *kcs_bmc, bool enable)
+static void aspeed_kcs_enable_channel(struct kcs_bmc_device *kcs_bmc, bool enable)
{
struct aspeed_kcs_bmc *priv = to_aspeed_kcs_bmc(kcs_bmc);

@@ -228,7 +228,7 @@ static const struct kcs_bmc_device_ops aspeed_kcs_ops = {

static irqreturn_t aspeed_kcs_irq(int irq, void *arg)
{
- struct kcs_bmc *kcs_bmc = arg;
+ struct kcs_bmc_device *kcs_bmc = arg;
int rc;

rc = kcs_bmc_handle_event(kcs_bmc);
@@ -238,7 +238,7 @@ static irqreturn_t aspeed_kcs_irq(int irq, void *arg)
return rc == KCS_BMC_EVENT_HANDLED ? IRQ_HANDLED : IRQ_NONE;
}

-static int aspeed_kcs_config_irq(struct kcs_bmc *kcs_bmc,
+static int aspeed_kcs_config_irq(struct kcs_bmc_device *kcs_bmc,
struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -338,8 +338,8 @@ static int aspeed_kcs_of_v2_get_io_address(struct platform_device *pdev)
static int aspeed_kcs_probe(struct platform_device *pdev)
{
const struct aspeed_kcs_of_ops *ops;
+ struct kcs_bmc_device *kcs_bmc;
struct aspeed_kcs_bmc *priv;
- struct kcs_bmc *kcs_bmc;
struct device_node *np;
int rc, channel, addr;

@@ -400,7 +400,7 @@ static int aspeed_kcs_probe(struct platform_device *pdev)
static int aspeed_kcs_remove(struct platform_device *pdev)
{
struct aspeed_kcs_bmc *priv = platform_get_drvdata(pdev);
- struct kcs_bmc *kcs_bmc = &priv->kcs_bmc;
+ struct kcs_bmc_device *kcs_bmc = &priv->kcs_bmc;

kcs_bmc_remove_device(kcs_bmc);

diff --git a/drivers/char/ipmi/kcs_bmc_cdev_ipmi.c b/drivers/char/ipmi/kcs_bmc_cdev_ipmi.c
index fd852d8abe48..58c42e76483d 100644
--- a/drivers/char/ipmi/kcs_bmc_cdev_ipmi.c
+++ b/drivers/char/ipmi/kcs_bmc_cdev_ipmi.c
@@ -8,13 +8,88 @@
#include <linux/errno.h>
#include <linux/io.h>
#include <linux/ipmi_bmc.h>
+#include <linux/list.h>
+#include <linux/miscdevice.h>
#include <linux/module.h>
+#include <linux/mutex.h>
#include <linux/platform_device.h>
#include <linux/poll.h>
#include <linux/sched.h>
#include <linux/slab.h>

-#include "kcs_bmc.h"
+#include "kcs_bmc_client.h"
+
+/* Different phases of the KCS BMC module.
+ * KCS_PHASE_IDLE:
+ * BMC should not be expecting nor sending any data.
+ * KCS_PHASE_WRITE_START:
+ * BMC is receiving a WRITE_START command from system software.
+ * KCS_PHASE_WRITE_DATA:
+ * BMC is receiving a data byte from system software.
+ * KCS_PHASE_WRITE_END_CMD:
+ * BMC is waiting a last data byte from system software.
+ * KCS_PHASE_WRITE_DONE:
+ * BMC has received the whole request from system software.
+ * KCS_PHASE_WAIT_READ:
+ * BMC is waiting the response from the upper IPMI service.
+ * KCS_PHASE_READ:
+ * BMC is transferring the response to system software.
+ * KCS_PHASE_ABORT_ERROR1:
+ * BMC is waiting error status request from system software.
+ * KCS_PHASE_ABORT_ERROR2:
+ * BMC is waiting for idle status afer error from system software.
+ * KCS_PHASE_ERROR:
+ * BMC has detected a protocol violation at the interface level.
+ */
+enum kcs_ipmi_phases {
+ KCS_PHASE_IDLE,
+
+ KCS_PHASE_WRITE_START,
+ KCS_PHASE_WRITE_DATA,
+ KCS_PHASE_WRITE_END_CMD,
+ KCS_PHASE_WRITE_DONE,
+
+ KCS_PHASE_WAIT_READ,
+ KCS_PHASE_READ,
+
+ KCS_PHASE_ABORT_ERROR1,
+ KCS_PHASE_ABORT_ERROR2,
+ KCS_PHASE_ERROR
+};
+
+/* IPMI 2.0 - Table 9-4, KCS Interface Status Codes */
+enum kcs_ipmi_errors {
+ KCS_NO_ERROR = 0x00,
+ KCS_ABORTED_BY_COMMAND = 0x01,
+ KCS_ILLEGAL_CONTROL_CODE = 0x02,
+ KCS_LENGTH_ERROR = 0x06,
+ KCS_UNSPECIFIED_ERROR = 0xFF
+};
+
+struct kcs_bmc_ipmi {
+ struct list_head entry;
+
+ struct kcs_bmc_client client;
+
+ spinlock_t lock;
+
+ enum kcs_ipmi_phases phase;
+ enum kcs_ipmi_errors error;
+
+ wait_queue_head_t queue;
+ bool data_in_avail;
+ int data_in_idx;
+ u8 *data_in;
+
+ int data_out_idx;
+ int data_out_len;
+ u8 *data_out;
+
+ struct mutex mutex;
+ u8 *kbuffer;
+
+ struct miscdevice miscdev;
+};

#define DEVICE_NAME "ipmi-kcs"

@@ -44,171 +119,169 @@ enum kcs_states {
#define KCS_CMD_WRITE_END 0x62
#define KCS_CMD_READ_BYTE 0x68

-static inline void set_state(struct kcs_bmc *kcs_bmc, u8 state)
+static inline void set_state(struct kcs_bmc_ipmi *priv, u8 state)
{
- kcs_bmc_update_status(kcs_bmc, KCS_STATUS_STATE_MASK,
- KCS_STATUS_STATE(state));
+ kcs_bmc_update_status(priv->client.dev, KCS_STATUS_STATE_MASK, KCS_STATUS_STATE(state));
}

-static void kcs_bmc_ipmi_force_abort(struct kcs_bmc *kcs_bmc)
+static void kcs_bmc_ipmi_force_abort(struct kcs_bmc_ipmi *priv)
{
- set_state(kcs_bmc, ERROR_STATE);
- kcs_bmc_read_data(kcs_bmc);
- kcs_bmc_write_data(kcs_bmc, KCS_ZERO_DATA);
+ set_state(priv, ERROR_STATE);
+ kcs_bmc_read_data(priv->client.dev);
+ kcs_bmc_write_data(priv->client.dev, KCS_ZERO_DATA);

- kcs_bmc->phase = KCS_PHASE_ERROR;
- kcs_bmc->data_in_avail = false;
- kcs_bmc->data_in_idx = 0;
+ priv->phase = KCS_PHASE_ERROR;
+ priv->data_in_avail = false;
+ priv->data_in_idx = 0;
}

-static void kcs_bmc_ipmi_handle_data(struct kcs_bmc *kcs_bmc)
+static void kcs_bmc_ipmi_handle_data(struct kcs_bmc_ipmi *priv)
{
+ struct kcs_bmc_device *dev;
u8 data;

- switch (kcs_bmc->phase) {
+ dev = priv->client.dev;
+
+ switch (priv->phase) {
case KCS_PHASE_WRITE_START:
- kcs_bmc->phase = KCS_PHASE_WRITE_DATA;
+ priv->phase = KCS_PHASE_WRITE_DATA;
fallthrough;

case KCS_PHASE_WRITE_DATA:
- if (kcs_bmc->data_in_idx < KCS_MSG_BUFSIZ) {
- set_state(kcs_bmc, WRITE_STATE);
- kcs_bmc_write_data(kcs_bmc, KCS_ZERO_DATA);
- kcs_bmc->data_in[kcs_bmc->data_in_idx++] =
- kcs_bmc_read_data(kcs_bmc);
+ if (priv->data_in_idx < KCS_MSG_BUFSIZ) {
+ set_state(priv, WRITE_STATE);
+ kcs_bmc_write_data(dev, KCS_ZERO_DATA);
+ priv->data_in[priv->data_in_idx++] = kcs_bmc_read_data(dev);
} else {
- kcs_bmc_ipmi_force_abort(kcs_bmc);
- kcs_bmc->error = KCS_LENGTH_ERROR;
+ kcs_bmc_ipmi_force_abort(priv);
+ priv->error = KCS_LENGTH_ERROR;
}
break;

case KCS_PHASE_WRITE_END_CMD:
- if (kcs_bmc->data_in_idx < KCS_MSG_BUFSIZ) {
- set_state(kcs_bmc, READ_STATE);
- kcs_bmc->data_in[kcs_bmc->data_in_idx++] =
- kcs_bmc_read_data(kcs_bmc);
- kcs_bmc->phase = KCS_PHASE_WRITE_DONE;
- kcs_bmc->data_in_avail = true;
- wake_up_interruptible(&kcs_bmc->queue);
+ if (priv->data_in_idx < KCS_MSG_BUFSIZ) {
+ set_state(priv, READ_STATE);
+ priv->data_in[priv->data_in_idx++] = kcs_bmc_read_data(dev);
+ priv->phase = KCS_PHASE_WRITE_DONE;
+ priv->data_in_avail = true;
+ wake_up_interruptible(&priv->queue);
} else {
- kcs_bmc_ipmi_force_abort(kcs_bmc);
- kcs_bmc->error = KCS_LENGTH_ERROR;
+ kcs_bmc_ipmi_force_abort(priv);
+ priv->error = KCS_LENGTH_ERROR;
}
break;

case KCS_PHASE_READ:
- if (kcs_bmc->data_out_idx == kcs_bmc->data_out_len)
- set_state(kcs_bmc, IDLE_STATE);
+ if (priv->data_out_idx == priv->data_out_len)
+ set_state(priv, IDLE_STATE);

- data = kcs_bmc_read_data(kcs_bmc);
+ data = kcs_bmc_read_data(dev);
if (data != KCS_CMD_READ_BYTE) {
- set_state(kcs_bmc, ERROR_STATE);
- kcs_bmc_write_data(kcs_bmc, KCS_ZERO_DATA);
+ set_state(priv, ERROR_STATE);
+ kcs_bmc_write_data(dev, KCS_ZERO_DATA);
break;
}

- if (kcs_bmc->data_out_idx == kcs_bmc->data_out_len) {
- kcs_bmc_write_data(kcs_bmc, KCS_ZERO_DATA);
- kcs_bmc->phase = KCS_PHASE_IDLE;
+ if (priv->data_out_idx == priv->data_out_len) {
+ kcs_bmc_write_data(dev, KCS_ZERO_DATA);
+ priv->phase = KCS_PHASE_IDLE;
break;
}

- kcs_bmc_write_data(kcs_bmc,
- kcs_bmc->data_out[kcs_bmc->data_out_idx++]);
+ kcs_bmc_write_data(dev, priv->data_out[priv->data_out_idx++]);
break;

case KCS_PHASE_ABORT_ERROR1:
- set_state(kcs_bmc, READ_STATE);
- kcs_bmc_read_data(kcs_bmc);
- kcs_bmc_write_data(kcs_bmc, kcs_bmc->error);
- kcs_bmc->phase = KCS_PHASE_ABORT_ERROR2;
+ set_state(priv, READ_STATE);
+ kcs_bmc_read_data(dev);
+ kcs_bmc_write_data(dev, priv->error);
+ priv->phase = KCS_PHASE_ABORT_ERROR2;
break;

case KCS_PHASE_ABORT_ERROR2:
- set_state(kcs_bmc, IDLE_STATE);
- kcs_bmc_read_data(kcs_bmc);
- kcs_bmc_write_data(kcs_bmc, KCS_ZERO_DATA);
- kcs_bmc->phase = KCS_PHASE_IDLE;
+ set_state(priv, IDLE_STATE);
+ kcs_bmc_read_data(dev);
+ kcs_bmc_write_data(dev, KCS_ZERO_DATA);
+ priv->phase = KCS_PHASE_IDLE;
break;

default:
- kcs_bmc_ipmi_force_abort(kcs_bmc);
+ kcs_bmc_ipmi_force_abort(priv);
break;
}
}

-static void kcs_bmc_ipmi_handle_cmd(struct kcs_bmc *kcs_bmc)
+static void kcs_bmc_ipmi_handle_cmd(struct kcs_bmc_ipmi *priv)
{
u8 cmd;

- set_state(kcs_bmc, WRITE_STATE);
- kcs_bmc_write_data(kcs_bmc, KCS_ZERO_DATA);
+ set_state(priv, WRITE_STATE);
+ kcs_bmc_write_data(priv->client.dev, KCS_ZERO_DATA);

- cmd = kcs_bmc_read_data(kcs_bmc);
+ cmd = kcs_bmc_read_data(priv->client.dev);
switch (cmd) {
case KCS_CMD_WRITE_START:
- kcs_bmc->phase = KCS_PHASE_WRITE_START;
- kcs_bmc->error = KCS_NO_ERROR;
- kcs_bmc->data_in_avail = false;
- kcs_bmc->data_in_idx = 0;
+ priv->phase = KCS_PHASE_WRITE_START;
+ priv->error = KCS_NO_ERROR;
+ priv->data_in_avail = false;
+ priv->data_in_idx = 0;
break;

case KCS_CMD_WRITE_END:
- if (kcs_bmc->phase != KCS_PHASE_WRITE_DATA) {
- kcs_bmc_ipmi_force_abort(kcs_bmc);
+ if (priv->phase != KCS_PHASE_WRITE_DATA) {
+ kcs_bmc_ipmi_force_abort(priv);
break;
}

- kcs_bmc->phase = KCS_PHASE_WRITE_END_CMD;
+ priv->phase = KCS_PHASE_WRITE_END_CMD;
break;

case KCS_CMD_GET_STATUS_ABORT:
- if (kcs_bmc->error == KCS_NO_ERROR)
- kcs_bmc->error = KCS_ABORTED_BY_COMMAND;
+ if (priv->error == KCS_NO_ERROR)
+ priv->error = KCS_ABORTED_BY_COMMAND;

- kcs_bmc->phase = KCS_PHASE_ABORT_ERROR1;
- kcs_bmc->data_in_avail = false;
- kcs_bmc->data_in_idx = 0;
+ priv->phase = KCS_PHASE_ABORT_ERROR1;
+ priv->data_in_avail = false;
+ priv->data_in_idx = 0;
break;

default:
- kcs_bmc_ipmi_force_abort(kcs_bmc);
- kcs_bmc->error = KCS_ILLEGAL_CONTROL_CODE;
+ kcs_bmc_ipmi_force_abort(priv);
+ priv->error = KCS_ILLEGAL_CONTROL_CODE;
break;
}
}

-static inline struct kcs_bmc *client_to_kcs_bmc(struct kcs_bmc_client *client)
+static inline struct kcs_bmc_ipmi *client_to_kcs_bmc_ipmi(struct kcs_bmc_client *client)
{
- return container_of(client, struct kcs_bmc, client);
+ return container_of(client, struct kcs_bmc_ipmi, client);
}

static int kcs_bmc_ipmi_event(struct kcs_bmc_client *client)
{
- struct kcs_bmc *kcs_bmc;
- unsigned long flags;
+ struct kcs_bmc_ipmi *priv;
u8 status;
int ret;

- kcs_bmc = client_to_kcs_bmc(client);
+ priv = client_to_kcs_bmc_ipmi(client);
+ if (!priv)
+ return KCS_BMC_EVENT_NONE;

- spin_lock_irqsave(&kcs_bmc->lock, flags);
+ spin_lock(&priv->lock);

- status = kcs_bmc_read_status(kcs_bmc);
+ status = kcs_bmc_read_status(client->dev);
if (status & KCS_STATUS_IBF) {
- if (!kcs_bmc->running)
- kcs_bmc_ipmi_force_abort(kcs_bmc);
- else if (status & KCS_STATUS_CMD_DAT)
- kcs_bmc_ipmi_handle_cmd(kcs_bmc);
+ if (status & KCS_STATUS_CMD_DAT)
+ kcs_bmc_ipmi_handle_cmd(priv);
else
- kcs_bmc_ipmi_handle_data(kcs_bmc);
+ kcs_bmc_ipmi_handle_data(priv);

ret = KCS_BMC_EVENT_HANDLED;
} else {
ret = KCS_BMC_EVENT_NONE;
}

- spin_unlock_irqrestore(&kcs_bmc->lock, flags);
+ spin_unlock(&priv->lock);

return ret;
}
@@ -217,37 +290,29 @@ static const struct kcs_bmc_client_ops kcs_bmc_ipmi_client_ops = {
.event = kcs_bmc_ipmi_event,
};

-static inline struct kcs_bmc *file_to_kcs_bmc(struct file *filp)
+static inline struct kcs_bmc_ipmi *to_kcs_bmc(struct file *filp)
{
- return container_of(filp->private_data, struct kcs_bmc, miscdev);
+ return container_of(filp->private_data, struct kcs_bmc_ipmi, miscdev);
}

static int kcs_bmc_ipmi_open(struct inode *inode, struct file *filp)
{
- struct kcs_bmc *kcs_bmc = file_to_kcs_bmc(filp);
- int ret = 0;
+ struct kcs_bmc_ipmi *priv = to_kcs_bmc(filp);

- spin_lock_irq(&kcs_bmc->lock);
- if (!kcs_bmc->running)
- kcs_bmc->running = 1;
- else
- ret = -EBUSY;
- spin_unlock_irq(&kcs_bmc->lock);
-
- return ret;
+ return kcs_bmc_enable_device(priv->client.dev, &priv->client);
}

static __poll_t kcs_bmc_ipmi_poll(struct file *filp, poll_table *wait)
{
- struct kcs_bmc *kcs_bmc = file_to_kcs_bmc(filp);
+ struct kcs_bmc_ipmi *priv = to_kcs_bmc(filp);
__poll_t mask = 0;

- poll_wait(filp, &kcs_bmc->queue, wait);
+ poll_wait(filp, &priv->queue, wait);

- spin_lock_irq(&kcs_bmc->lock);
- if (kcs_bmc->data_in_avail)
+ spin_lock_irq(&priv->lock);
+ if (priv->data_in_avail)
mask |= EPOLLIN;
- spin_unlock_irq(&kcs_bmc->lock);
+ spin_unlock_irq(&priv->lock);

return mask;
}
@@ -255,24 +320,24 @@ static __poll_t kcs_bmc_ipmi_poll(struct file *filp, poll_table *wait)
static ssize_t kcs_bmc_ipmi_read(struct file *filp, char __user *buf,
size_t count, loff_t *ppos)
{
- struct kcs_bmc *kcs_bmc = file_to_kcs_bmc(filp);
+ struct kcs_bmc_ipmi *priv = to_kcs_bmc(filp);
bool data_avail;
size_t data_len;
ssize_t ret;

if (!(filp->f_flags & O_NONBLOCK))
- wait_event_interruptible(kcs_bmc->queue,
- kcs_bmc->data_in_avail);
+ wait_event_interruptible(priv->queue,
+ priv->data_in_avail);

- mutex_lock(&kcs_bmc->mutex);
+ mutex_lock(&priv->mutex);

- spin_lock_irq(&kcs_bmc->lock);
- data_avail = kcs_bmc->data_in_avail;
+ spin_lock_irq(&priv->lock);
+ data_avail = priv->data_in_avail;
if (data_avail) {
- data_len = kcs_bmc->data_in_idx;
- memcpy(kcs_bmc->kbuffer, kcs_bmc->data_in, data_len);
+ data_len = priv->data_in_idx;
+ memcpy(priv->kbuffer, priv->data_in, data_len);
}
- spin_unlock_irq(&kcs_bmc->lock);
+ spin_unlock_irq(&priv->lock);

if (!data_avail) {
ret = -EAGAIN;
@@ -281,35 +346,35 @@ static ssize_t kcs_bmc_ipmi_read(struct file *filp, char __user *buf,

if (count < data_len) {
pr_err("channel=%u with too large data : %zu\n",
- kcs_bmc->channel, data_len);
+ priv->client.dev->channel, data_len);

- spin_lock_irq(&kcs_bmc->lock);
- kcs_bmc_ipmi_force_abort(kcs_bmc);
- spin_unlock_irq(&kcs_bmc->lock);
+ spin_lock_irq(&priv->lock);
+ kcs_bmc_ipmi_force_abort(priv);
+ spin_unlock_irq(&priv->lock);

ret = -EOVERFLOW;
goto out_unlock;
}

- if (copy_to_user(buf, kcs_bmc->kbuffer, data_len)) {
+ if (copy_to_user(buf, priv->kbuffer, data_len)) {
ret = -EFAULT;
goto out_unlock;
}

ret = data_len;

- spin_lock_irq(&kcs_bmc->lock);
- if (kcs_bmc->phase == KCS_PHASE_WRITE_DONE) {
- kcs_bmc->phase = KCS_PHASE_WAIT_READ;
- kcs_bmc->data_in_avail = false;
- kcs_bmc->data_in_idx = 0;
+ spin_lock_irq(&priv->lock);
+ if (priv->phase == KCS_PHASE_WRITE_DONE) {
+ priv->phase = KCS_PHASE_WAIT_READ;
+ priv->data_in_avail = false;
+ priv->data_in_idx = 0;
} else {
ret = -EAGAIN;
}
- spin_unlock_irq(&kcs_bmc->lock);
+ spin_unlock_irq(&priv->lock);

out_unlock:
- mutex_unlock(&kcs_bmc->mutex);
+ mutex_unlock(&priv->mutex);

return ret;
}
@@ -317,35 +382,35 @@ static ssize_t kcs_bmc_ipmi_read(struct file *filp, char __user *buf,
static ssize_t kcs_bmc_ipmi_write(struct file *filp, const char __user *buf,
size_t count, loff_t *ppos)
{
- struct kcs_bmc *kcs_bmc = file_to_kcs_bmc(filp);
+ struct kcs_bmc_ipmi *priv = to_kcs_bmc(filp);
ssize_t ret;

/* a minimum response size '3' : netfn + cmd + ccode */
if (count < 3 || count > KCS_MSG_BUFSIZ)
return -EINVAL;

- mutex_lock(&kcs_bmc->mutex);
+ mutex_lock(&priv->mutex);

- if (copy_from_user(kcs_bmc->kbuffer, buf, count)) {
+ if (copy_from_user(priv->kbuffer, buf, count)) {
ret = -EFAULT;
goto out_unlock;
}

- spin_lock_irq(&kcs_bmc->lock);
- if (kcs_bmc->phase == KCS_PHASE_WAIT_READ) {
- kcs_bmc->phase = KCS_PHASE_READ;
- kcs_bmc->data_out_idx = 1;
- kcs_bmc->data_out_len = count;
- memcpy(kcs_bmc->data_out, kcs_bmc->kbuffer, count);
- kcs_bmc_write_data(kcs_bmc, kcs_bmc->data_out[0]);
+ spin_lock_irq(&priv->lock);
+ if (priv->phase == KCS_PHASE_WAIT_READ) {
+ priv->phase = KCS_PHASE_READ;
+ priv->data_out_idx = 1;
+ priv->data_out_len = count;
+ memcpy(priv->data_out, priv->kbuffer, count);
+ kcs_bmc_write_data(priv->client.dev, priv->data_out[0]);
ret = count;
} else {
ret = -EINVAL;
}
- spin_unlock_irq(&kcs_bmc->lock);
+ spin_unlock_irq(&priv->lock);

out_unlock:
- mutex_unlock(&kcs_bmc->mutex);
+ mutex_unlock(&priv->mutex);

return ret;
}
@@ -353,22 +418,22 @@ static ssize_t kcs_bmc_ipmi_write(struct file *filp, const char __user *buf,
static long kcs_bmc_ipmi_ioctl(struct file *filp, unsigned int cmd,
unsigned long arg)
{
- struct kcs_bmc *kcs_bmc = file_to_kcs_bmc(filp);
+ struct kcs_bmc_ipmi *priv = to_kcs_bmc(filp);
long ret = 0;

- spin_lock_irq(&kcs_bmc->lock);
+ spin_lock_irq(&priv->lock);

switch (cmd) {
case IPMI_BMC_IOCTL_SET_SMS_ATN:
- kcs_bmc_update_status(kcs_bmc, KCS_STATUS_SMS_ATN, KCS_STATUS_SMS_ATN);
+ kcs_bmc_update_status(priv->client.dev, KCS_STATUS_SMS_ATN, KCS_STATUS_SMS_ATN);
break;

case IPMI_BMC_IOCTL_CLEAR_SMS_ATN:
- kcs_bmc_update_status(kcs_bmc, KCS_STATUS_SMS_ATN, 0);
+ kcs_bmc_update_status(priv->client.dev, KCS_STATUS_SMS_ATN, 0);
break;

case IPMI_BMC_IOCTL_FORCE_ABORT:
- kcs_bmc_ipmi_force_abort(kcs_bmc);
+ kcs_bmc_ipmi_force_abort(priv);
break;

default:
@@ -376,19 +441,17 @@ static long kcs_bmc_ipmi_ioctl(struct file *filp, unsigned int cmd,
break;
}

- spin_unlock_irq(&kcs_bmc->lock);
+ spin_unlock_irq(&priv->lock);

return ret;
}

static int kcs_bmc_ipmi_release(struct inode *inode, struct file *filp)
{
- struct kcs_bmc *kcs_bmc = file_to_kcs_bmc(filp);
+ struct kcs_bmc_ipmi *priv = to_kcs_bmc(filp);

- spin_lock_irq(&kcs_bmc->lock);
- kcs_bmc->running = 0;
- kcs_bmc_ipmi_force_abort(kcs_bmc);
- spin_unlock_irq(&kcs_bmc->lock);
+ kcs_bmc_ipmi_force_abort(priv);
+ kcs_bmc_disable_device(priv->client.dev, &priv->client);

return 0;
}
@@ -403,56 +466,78 @@ static const struct file_operations kcs_bmc_ipmi_fops = {
.unlocked_ioctl = kcs_bmc_ipmi_ioctl,
};

-int kcs_bmc_ipmi_attach_cdev(struct kcs_bmc *kcs_bmc);
-int kcs_bmc_ipmi_attach_cdev(struct kcs_bmc *kcs_bmc)
+static DEFINE_SPINLOCK(kcs_bmc_ipmi_instances_lock);
+static LIST_HEAD(kcs_bmc_ipmi_instances);
+
+int kcs_bmc_ipmi_attach_cdev(struct kcs_bmc_device *kcs_bmc);
+int kcs_bmc_ipmi_attach_cdev(struct kcs_bmc_device *kcs_bmc)
{
+ struct kcs_bmc_ipmi *priv;
int rc;

- spin_lock_init(&kcs_bmc->lock);
- mutex_init(&kcs_bmc->mutex);
- init_waitqueue_head(&kcs_bmc->queue);
-
- kcs_bmc->client.dev = kcs_bmc;
- kcs_bmc->client.ops = &kcs_bmc_ipmi_client_ops;
- kcs_bmc->data_in = devm_kmalloc(kcs_bmc->dev, KCS_MSG_BUFSIZ, GFP_KERNEL);
- kcs_bmc->data_out = devm_kmalloc(kcs_bmc->dev, KCS_MSG_BUFSIZ, GFP_KERNEL);
- kcs_bmc->kbuffer = devm_kmalloc(kcs_bmc->dev, KCS_MSG_BUFSIZ, GFP_KERNEL);
-
- kcs_bmc->miscdev.minor = MISC_DYNAMIC_MINOR;
- kcs_bmc->miscdev.name = devm_kasprintf(kcs_bmc->dev, GFP_KERNEL, "%s%u",
- DEVICE_NAME, kcs_bmc->channel);
- if (!kcs_bmc->data_in || !kcs_bmc->data_out || !kcs_bmc->kbuffer ||
- !kcs_bmc->miscdev.name)
+ priv = devm_kzalloc(kcs_bmc->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
return -ENOMEM;

- kcs_bmc->miscdev.fops = &kcs_bmc_ipmi_fops;
+ spin_lock_init(&priv->lock);
+ mutex_init(&priv->mutex);

- rc = misc_register(&kcs_bmc->miscdev);
+ init_waitqueue_head(&priv->queue);
+
+ priv->client.dev = kcs_bmc;
+ priv->client.ops = &kcs_bmc_ipmi_client_ops;
+ priv->data_in = devm_kmalloc(kcs_bmc->dev, KCS_MSG_BUFSIZ, GFP_KERNEL);
+ priv->data_out = devm_kmalloc(kcs_bmc->dev, KCS_MSG_BUFSIZ, GFP_KERNEL);
+ priv->kbuffer = devm_kmalloc(kcs_bmc->dev, KCS_MSG_BUFSIZ, GFP_KERNEL);
+
+ priv->miscdev.minor = MISC_DYNAMIC_MINOR;
+ priv->miscdev.name = devm_kasprintf(kcs_bmc->dev, GFP_KERNEL, "%s%u", DEVICE_NAME,
+ kcs_bmc->channel);
+ if (!priv->data_in || !priv->data_out || !priv->kbuffer || !priv->miscdev.name)
+ return -EINVAL;
+
+ priv->miscdev.fops = &kcs_bmc_ipmi_fops;
+
+ rc = misc_register(&priv->miscdev);
if (rc) {
dev_err(kcs_bmc->dev, "Unable to register device: %d\n", rc);
return rc;
}

+ spin_lock_irq(&kcs_bmc_ipmi_instances_lock);
+ list_add(&priv->entry, &kcs_bmc_ipmi_instances);
+ spin_unlock_irq(&kcs_bmc_ipmi_instances_lock);
+
dev_info(kcs_bmc->dev, "Initialised IPMI client for channel %d", kcs_bmc->channel);

return 0;
}
EXPORT_SYMBOL(kcs_bmc_ipmi_attach_cdev);

-int kcs_bmc_ipmi_detach_cdev(struct kcs_bmc *kcs_bmc);
-int kcs_bmc_ipmi_detach_cdev(struct kcs_bmc *kcs_bmc)
+int kcs_bmc_ipmi_detach_cdev(struct kcs_bmc_device *kcs_bmc);
+int kcs_bmc_ipmi_detach_cdev(struct kcs_bmc_device *kcs_bmc)
{
- misc_deregister(&kcs_bmc->miscdev);
+ struct kcs_bmc_ipmi *priv = NULL, *pos;

- spin_lock_irq(&kcs_bmc->lock);
- kcs_bmc->running = 0;
- kcs_bmc_ipmi_force_abort(kcs_bmc);
- spin_unlock_irq(&kcs_bmc->lock);
+ spin_lock_irq(&kcs_bmc_ipmi_instances_lock);
+ list_for_each_entry(pos, &kcs_bmc_ipmi_instances, entry) {
+ if (pos->client.dev == kcs_bmc) {
+ priv = pos;
+ list_del(&pos->entry);
+ break;
+ }
+ }
+ spin_unlock_irq(&kcs_bmc_ipmi_instances_lock);

- devm_kfree(kcs_bmc->dev, kcs_bmc->kbuffer);
- devm_kfree(kcs_bmc->dev, kcs_bmc->data_out);
- devm_kfree(kcs_bmc->dev, kcs_bmc->data_in);
- devm_kfree(kcs_bmc->dev, kcs_bmc);
+ if (!priv)
+ return 0;
+
+ misc_deregister(&priv->miscdev);
+ kcs_bmc_disable_device(priv->client.dev, &priv->client);
+ devm_kfree(kcs_bmc->dev, priv->kbuffer);
+ devm_kfree(kcs_bmc->dev, priv->data_out);
+ devm_kfree(kcs_bmc->dev, priv->data_in);
+ devm_kfree(kcs_bmc->dev, priv);

return 0;
}
@@ -460,4 +545,5 @@ EXPORT_SYMBOL(kcs_bmc_ipmi_detach_cdev);

MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Haiyue Wang <haiyue.wang@linux.intel.com>");
+MODULE_AUTHOR("Andrew Jeffery <andrew@aj.id.au>");
MODULE_DESCRIPTION("KCS BMC to handle the IPMI request from system software");
diff --git a/drivers/char/ipmi/kcs_bmc_client.h b/drivers/char/ipmi/kcs_bmc_client.h
index 140631d157d8..2dd710f4b4aa 100644
--- a/drivers/char/ipmi/kcs_bmc_client.h
+++ b/drivers/char/ipmi/kcs_bmc_client.h
@@ -8,22 +8,24 @@
#include <linux/notifier.h>
#include <stdbool.h>

-struct kcs_bmc;
-struct kcs_bmc_client_ops;
-
-struct kcs_bmc_client {
- const struct kcs_bmc_client_ops *ops;
-
- struct kcs_bmc *dev;
-};
+#include "kcs_bmc.h"

struct kcs_bmc_client_ops {
int (*event)(struct kcs_bmc_client *client);
};

-u8 kcs_bmc_read_data(struct kcs_bmc *kcs_bmc);
-void kcs_bmc_write_data(struct kcs_bmc *kcs_bmc, u8 data);
-u8 kcs_bmc_read_status(struct kcs_bmc *kcs_bmc);
-void kcs_bmc_write_status(struct kcs_bmc *kcs_bmc, u8 data);
-void kcs_bmc_update_status(struct kcs_bmc *kcs_bmc, u8 mask, u8 val);
+struct kcs_bmc_client {
+ const struct kcs_bmc_client_ops *ops;
+
+ struct kcs_bmc_device *dev;
+};
+
+int kcs_bmc_enable_device(struct kcs_bmc_device *kcs_bmc, struct kcs_bmc_client *client);
+void kcs_bmc_disable_device(struct kcs_bmc_device *kcs_bmc, struct kcs_bmc_client *client);
+
+u8 kcs_bmc_read_data(struct kcs_bmc_device *kcs_bmc);
+void kcs_bmc_write_data(struct kcs_bmc_device *kcs_bmc, u8 data);
+u8 kcs_bmc_read_status(struct kcs_bmc_device *kcs_bmc);
+void kcs_bmc_write_status(struct kcs_bmc_device *kcs_bmc, u8 data);
+void kcs_bmc_update_status(struct kcs_bmc_device *kcs_bmc, u8 mask, u8 val);
#endif
diff --git a/drivers/char/ipmi/kcs_bmc_device.h b/drivers/char/ipmi/kcs_bmc_device.h
index 33462174516d..57b7174b2bac 100644
--- a/drivers/char/ipmi/kcs_bmc_device.h
+++ b/drivers/char/ipmi/kcs_bmc_device.h
@@ -7,13 +7,13 @@
#include "kcs_bmc.h"

struct kcs_bmc_device_ops {
- u8 (*io_inputb)(struct kcs_bmc *kcs_bmc, u32 reg);
- void (*io_outputb)(struct kcs_bmc *kcs_bmc, u32 reg, u8 b);
- void (*io_updateb)(struct kcs_bmc *kcs_bmc, u32 reg, u8 mask, u8 b);
+ u8 (*io_inputb)(struct kcs_bmc_device *kcs_bmc, u32 reg);
+ void (*io_outputb)(struct kcs_bmc_device *kcs_bmc, u32 reg, u8 b);
+ void (*io_updateb)(struct kcs_bmc_device *kcs_bmc, u32 reg, u8 mask, u8 b);
};

-int kcs_bmc_handle_event(struct kcs_bmc *kcs_bmc);
-int kcs_bmc_add_device(struct kcs_bmc *kcs_bmc);
-int kcs_bmc_remove_device(struct kcs_bmc *kcs_bmc);
+int kcs_bmc_handle_event(struct kcs_bmc_device *kcs_bmc);
+int kcs_bmc_add_device(struct kcs_bmc_device *kcs_bmc);
+int kcs_bmc_remove_device(struct kcs_bmc_device *kcs_bmc);

#endif
diff --git a/drivers/char/ipmi/kcs_bmc_npcm7xx.c b/drivers/char/ipmi/kcs_bmc_npcm7xx.c
index 1d21697fc585..dce93ec895fc 100644
--- a/drivers/char/ipmi/kcs_bmc_npcm7xx.c
+++ b/drivers/char/ipmi/kcs_bmc_npcm7xx.c
@@ -65,7 +65,7 @@ struct npcm7xx_kcs_reg {
};

struct npcm7xx_kcs_bmc {
- struct kcs_bmc kcs_bmc;
+ struct kcs_bmc_device kcs_bmc;

struct regmap *map;

@@ -78,12 +78,12 @@ static const struct npcm7xx_kcs_reg npcm7xx_kcs_reg_tbl[KCS_CHANNEL_MAX] = {
{ .sts = KCS3ST, .dob = KCS3DO, .dib = KCS3DI, .ctl = KCS3CTL, .ie = KCS3IE },
};

-static inline struct npcm7xx_kcs_bmc *to_npcm7xx_kcs_bmc(struct kcs_bmc *kcs_bmc)
+static inline struct npcm7xx_kcs_bmc *to_npcm7xx_kcs_bmc(struct kcs_bmc_device *kcs_bmc)
{
return container_of(kcs_bmc, struct npcm7xx_kcs_bmc, kcs_bmc);
}

-static u8 npcm7xx_kcs_inb(struct kcs_bmc *kcs_bmc, u32 reg)
+static u8 npcm7xx_kcs_inb(struct kcs_bmc_device *kcs_bmc, u32 reg)
{
struct npcm7xx_kcs_bmc *priv = to_npcm7xx_kcs_bmc(kcs_bmc);
u32 val = 0;
@@ -95,7 +95,7 @@ static u8 npcm7xx_kcs_inb(struct kcs_bmc *kcs_bmc, u32 reg)
return rc == 0 ? (u8)val : 0;
}

-static void npcm7xx_kcs_outb(struct kcs_bmc *kcs_bmc, u32 reg, u8 data)
+static void npcm7xx_kcs_outb(struct kcs_bmc_device *kcs_bmc, u32 reg, u8 data)
{
struct npcm7xx_kcs_bmc *priv = to_npcm7xx_kcs_bmc(kcs_bmc);
int rc;
@@ -104,7 +104,7 @@ static void npcm7xx_kcs_outb(struct kcs_bmc *kcs_bmc, u32 reg, u8 data)
WARN(rc != 0, "regmap_write() failed: %d\n", rc);
}

-static void npcm7xx_kcs_updateb(struct kcs_bmc *kcs_bmc, u32 reg, u8 mask, u8 data)
+static void npcm7xx_kcs_updateb(struct kcs_bmc_device *kcs_bmc, u32 reg, u8 mask, u8 data)
{
struct npcm7xx_kcs_bmc *priv = to_npcm7xx_kcs_bmc(kcs_bmc);
int rc;
@@ -113,7 +113,7 @@ static void npcm7xx_kcs_updateb(struct kcs_bmc *kcs_bmc, u32 reg, u8 mask, u8 da
WARN(rc != 0, "regmap_update_bits() failed: %d\n", rc);
}

-static void npcm7xx_kcs_enable_channel(struct kcs_bmc *kcs_bmc, bool enable)
+static void npcm7xx_kcs_enable_channel(struct kcs_bmc_device *kcs_bmc, bool enable)
{
struct npcm7xx_kcs_bmc *priv = to_npcm7xx_kcs_bmc(kcs_bmc);

@@ -126,7 +126,7 @@ static void npcm7xx_kcs_enable_channel(struct kcs_bmc *kcs_bmc, bool enable)

static irqreturn_t npcm7xx_kcs_irq(int irq, void *arg)
{
- struct kcs_bmc *kcs_bmc = arg;
+ struct kcs_bmc_device *kcs_bmc = arg;
int rc;

rc = kcs_bmc_handle_event(kcs_bmc);
@@ -136,7 +136,7 @@ static irqreturn_t npcm7xx_kcs_irq(int irq, void *arg)
return rc == KCS_BMC_EVENT_HANDLED ? IRQ_HANDLED : IRQ_NONE;
}

-static int npcm7xx_kcs_config_irq(struct kcs_bmc *kcs_bmc,
+static int npcm7xx_kcs_config_irq(struct kcs_bmc_device *kcs_bmc,
struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -160,7 +160,7 @@ static int npcm7xx_kcs_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct npcm7xx_kcs_bmc *priv;
- struct kcs_bmc *kcs_bmc;
+ struct kcs_bmc_device *kcs_bmc;
u32 chan;
int rc;

@@ -207,7 +207,7 @@ static int npcm7xx_kcs_probe(struct platform_device *pdev)
static int npcm7xx_kcs_remove(struct platform_device *pdev)
{
struct npcm7xx_kcs_bmc *priv = platform_get_drvdata(pdev);
- struct kcs_bmc *kcs_bmc = &priv->kcs_bmc;
+ struct kcs_bmc_device *kcs_bmc = &priv->kcs_bmc;

kcs_bmc_remove_device(kcs_bmc);

--
2.27.0