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path: root/drivers/misc/mei/hw-me.c
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Diffstat (limited to 'drivers/misc/mei/hw-me.c')
-rw-r--r--drivers/misc/mei/hw-me.c124
1 files changed, 58 insertions, 66 deletions
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 642c6223fa6..fc032270916 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -26,14 +26,14 @@
/**
- * mei_reg_read - Reads 32bit data from the mei device
+ * mei_me_reg_read - Reads 32bit data from the mei device
*
* @dev: the device structure
* @offset: offset from which to read the data
*
* returns register value (u32)
*/
-static inline u32 mei_reg_read(const struct mei_me_hw *hw,
+static inline u32 mei_me_reg_read(const struct mei_me_hw *hw,
unsigned long offset)
{
return ioread32(hw->mem_addr + offset);
@@ -41,20 +41,20 @@ static inline u32 mei_reg_read(const struct mei_me_hw *hw,
/**
- * mei_reg_write - Writes 32bit data to the mei device
+ * mei_me_reg_write - Writes 32bit data to the mei device
*
* @dev: the device structure
* @offset: offset from which to write the data
* @value: register value to write (u32)
*/
-static inline void mei_reg_write(const struct mei_me_hw *hw,
+static inline void mei_me_reg_write(const struct mei_me_hw *hw,
unsigned long offset, u32 value)
{
iowrite32(value, hw->mem_addr + offset);
}
/**
- * mei_mecbrw_read - Reads 32bit data from ME circular buffer
+ * mei_me_mecbrw_read - Reads 32bit data from ME circular buffer
* read window register
*
* @dev: the device structure
@@ -63,18 +63,18 @@ static inline void mei_reg_write(const struct mei_me_hw *hw,
*/
static u32 mei_me_mecbrw_read(const struct mei_device *dev)
{
- return mei_reg_read(to_me_hw(dev), ME_CB_RW);
+ return mei_me_reg_read(to_me_hw(dev), ME_CB_RW);
}
/**
- * mei_mecsr_read - Reads 32bit data from the ME CSR
+ * mei_me_mecsr_read - Reads 32bit data from the ME CSR
*
* @dev: the device structure
*
* returns ME_CSR_HA register value (u32)
*/
-static inline u32 mei_mecsr_read(const struct mei_me_hw *hw)
+static inline u32 mei_me_mecsr_read(const struct mei_me_hw *hw)
{
- return mei_reg_read(hw, ME_CSR_HA);
+ return mei_me_reg_read(hw, ME_CSR_HA);
}
/**
@@ -86,7 +86,7 @@ static inline u32 mei_mecsr_read(const struct mei_me_hw *hw)
*/
static inline u32 mei_hcsr_read(const struct mei_me_hw *hw)
{
- return mei_reg_read(hw, H_CSR);
+ return mei_me_reg_read(hw, H_CSR);
}
/**
@@ -98,7 +98,7 @@ static inline u32 mei_hcsr_read(const struct mei_me_hw *hw)
static inline void mei_hcsr_set(struct mei_me_hw *hw, u32 hcsr)
{
hcsr &= ~H_IS;
- mei_reg_write(hw, H_CSR, hcsr);
+ mei_me_reg_write(hw, H_CSR, hcsr);
}
@@ -123,7 +123,7 @@ static void mei_me_intr_clear(struct mei_device *dev)
struct mei_me_hw *hw = to_me_hw(dev);
u32 hcsr = mei_hcsr_read(hw);
if ((hcsr & H_IS) == H_IS)
- mei_reg_write(hw, H_CSR, hcsr);
+ mei_me_reg_write(hw, H_CSR, hcsr);
}
/**
* mei_me_intr_enable - enables mei device interrupts
@@ -228,10 +228,42 @@ static bool mei_me_host_is_ready(struct mei_device *dev)
static bool mei_me_hw_is_ready(struct mei_device *dev)
{
struct mei_me_hw *hw = to_me_hw(dev);
- hw->me_hw_state = mei_mecsr_read(hw);
+ hw->me_hw_state = mei_me_mecsr_read(hw);
return (hw->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA;
}
+static int mei_me_hw_ready_wait(struct mei_device *dev)
+{
+ int err;
+ if (mei_me_hw_is_ready(dev))
+ return 0;
+
+ mutex_unlock(&dev->device_lock);
+ err = wait_event_interruptible_timeout(dev->wait_hw_ready,
+ dev->recvd_hw_ready, MEI_INTEROP_TIMEOUT);
+ mutex_lock(&dev->device_lock);
+ if (!err && !dev->recvd_hw_ready) {
+ dev_err(&dev->pdev->dev,
+ "wait hw ready failed. status = 0x%x\n", err);
+ return -ETIMEDOUT;
+ }
+
+ dev->recvd_hw_ready = false;
+ return 0;
+}
+
+static int mei_me_hw_start(struct mei_device *dev)
+{
+ int ret = mei_me_hw_ready_wait(dev);
+ if (ret)
+ return ret;
+ dev_dbg(&dev->pdev->dev, "hw is ready\n");
+
+ mei_me_host_set_ready(dev);
+ return ret;
+}
+
+
/**
* mei_hbuf_filled_slots - gets number of device filled buffer slots
*
@@ -305,10 +337,11 @@ static int mei_me_write_message(struct mei_device *dev,
unsigned char *buf)
{
struct mei_me_hw *hw = to_me_hw(dev);
- unsigned long rem, dw_cnt;
+ unsigned long rem;
unsigned long length = header->length;
u32 *reg_buf = (u32 *)buf;
u32 hcsr;
+ u32 dw_cnt;
int i;
int empty_slots;
@@ -321,16 +354,16 @@ static int mei_me_write_message(struct mei_device *dev,
if (empty_slots < 0 || dw_cnt > empty_slots)
return -EIO;
- mei_reg_write(hw, H_CB_WW, *((u32 *) header));
+ mei_me_reg_write(hw, H_CB_WW, *((u32 *) header));
for (i = 0; i < length / 4; i++)
- mei_reg_write(hw, H_CB_WW, reg_buf[i]);
+ mei_me_reg_write(hw, H_CB_WW, reg_buf[i]);
rem = length & 0x3;
if (rem > 0) {
u32 reg = 0;
memcpy(&reg, &buf[length - rem], rem);
- mei_reg_write(hw, H_CB_WW, reg);
+ mei_me_reg_write(hw, H_CB_WW, reg);
}
hcsr = mei_hcsr_read(hw) | H_IG;
@@ -354,7 +387,7 @@ static int mei_me_count_full_read_slots(struct mei_device *dev)
char read_ptr, write_ptr;
unsigned char buffer_depth, filled_slots;
- hw->me_hw_state = mei_mecsr_read(hw);
+ hw->me_hw_state = mei_me_mecsr_read(hw);
buffer_depth = (unsigned char)((hw->me_hw_state & ME_CBD_HRA) >> 24);
read_ptr = (char) ((hw->me_hw_state & ME_CBRP_HRA) >> 8);
write_ptr = (char) ((hw->me_hw_state & ME_CBWP_HRA) >> 16);
@@ -414,7 +447,7 @@ irqreturn_t mei_me_irq_quick_handler(int irq, void *dev_id)
return IRQ_NONE;
/* clear H_IS bit in H_CSR */
- mei_reg_write(hw, H_CSR, csr_reg);
+ mei_me_reg_write(hw, H_CSR, csr_reg);
return IRQ_WAKE_THREAD;
}
@@ -433,12 +466,8 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id)
{
struct mei_device *dev = (struct mei_device *) dev_id;
struct mei_cl_cb complete_list;
- struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL;
- struct mei_cl *cl;
s32 slots;
int rets;
- bool bus_message_received;
-
dev_dbg(&dev->pdev->dev, "function called after ISR to handle the interrupt processing.\n");
/* initialize our complete list */
@@ -452,7 +481,7 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id)
/* check if ME wants a reset */
if (!mei_hw_is_ready(dev) &&
- dev->dev_state != MEI_DEV_RESETING &&
+ dev->dev_state != MEI_DEV_RESETTING &&
dev->dev_state != MEI_DEV_INITIALIZING) {
dev_dbg(&dev->pdev->dev, "FW not ready.\n");
mei_reset(dev, 1);
@@ -465,14 +494,9 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id)
if (mei_hw_is_ready(dev)) {
dev_dbg(&dev->pdev->dev, "we need to start the dev.\n");
- mei_host_set_ready(dev);
+ dev->recvd_hw_ready = true;
+ wake_up_interruptible(&dev->wait_hw_ready);
- dev_dbg(&dev->pdev->dev, "link is established start sending messages.\n");
- /* link is established * start sending messages. */
-
- dev->dev_state = MEI_DEV_INIT_CLIENTS;
-
- mei_hbm_start_req(dev);
mutex_unlock(&dev->device_lock);
return IRQ_HANDLED;
} else {
@@ -499,44 +523,20 @@ end:
dev_dbg(&dev->pdev->dev, "end of bottom half function.\n");
dev->hbuf_is_ready = mei_hbuf_is_ready(dev);
- bus_message_received = false;
- if (dev->recvd_msg && waitqueue_active(&dev->wait_recvd_msg)) {
- dev_dbg(&dev->pdev->dev, "received waiting bus message\n");
- bus_message_received = true;
- }
mutex_unlock(&dev->device_lock);
- if (bus_message_received) {
- dev_dbg(&dev->pdev->dev, "wake up dev->wait_recvd_msg\n");
- wake_up_interruptible(&dev->wait_recvd_msg);
- bus_message_received = false;
- }
- if (list_empty(&complete_list.list))
- return IRQ_HANDLED;
+ mei_irq_compl_handler(dev, &complete_list);
- list_for_each_entry_safe(cb_pos, cb_next, &complete_list.list, list) {
- cl = cb_pos->cl;
- list_del(&cb_pos->list);
- if (cl) {
- if (cl != &dev->iamthif_cl) {
- dev_dbg(&dev->pdev->dev, "completing call back.\n");
- mei_irq_complete_handler(cl, cb_pos);
- cb_pos = NULL;
- } else if (cl == &dev->iamthif_cl) {
- mei_amthif_complete(dev, cb_pos);
- }
- }
- }
return IRQ_HANDLED;
}
static const struct mei_hw_ops mei_me_hw_ops = {
- .host_set_ready = mei_me_host_set_ready,
.host_is_ready = mei_me_host_is_ready,
.hw_is_ready = mei_me_hw_is_ready,
.hw_reset = mei_me_hw_reset,
- .hw_config = mei_me_hw_config,
+ .hw_config = mei_me_hw_config,
+ .hw_start = mei_me_hw_start,
.intr_clear = mei_me_intr_clear,
.intr_enable = mei_me_intr_enable,
@@ -571,14 +571,6 @@ struct mei_device *mei_me_dev_init(struct pci_dev *pdev)
mei_device_init(dev);
- INIT_LIST_HEAD(&dev->wd_cl.link);
- INIT_LIST_HEAD(&dev->iamthif_cl.link);
- mei_io_list_init(&dev->amthif_cmd_list);
- mei_io_list_init(&dev->amthif_rd_complete_list);
-
- INIT_DELAYED_WORK(&dev->timer_work, mei_timer);
- INIT_WORK(&dev->init_work, mei_host_client_init);
-
dev->ops = &mei_me_hw_ops;
dev->pdev = pdev;
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-13 21:08:36 +0000