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path: root/drivers/misc/mei/hw-txe.c
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Diffstat (limited to 'drivers/misc/mei/hw-txe.c')
-rw-r--r--drivers/misc/mei/hw-txe.c111
1 files changed, 97 insertions, 14 deletions
diff --git a/drivers/misc/mei/hw-txe.c b/drivers/misc/mei/hw-txe.c
index f60182a52f9..93273783dec 100644
--- a/drivers/misc/mei/hw-txe.c
+++ b/drivers/misc/mei/hw-txe.c
@@ -158,7 +158,7 @@ static bool mei_txe_aliveness_set(struct mei_device *dev, u32 req)
dev_dbg(&dev->pdev->dev, "Aliveness current=%d request=%d\n",
hw->aliveness, req);
if (do_req) {
- hw->recvd_aliveness = false;
+ dev->pg_event = MEI_PG_EVENT_WAIT;
mei_txe_br_reg_write(hw, SICR_HOST_ALIVENESS_REQ_REG, req);
}
return do_req;
@@ -213,6 +213,7 @@ static int mei_txe_aliveness_poll(struct mei_device *dev, u32 expected)
do {
hw->aliveness = mei_txe_aliveness_get(dev);
if (hw->aliveness == expected) {
+ dev->pg_event = MEI_PG_EVENT_IDLE;
dev_dbg(&dev->pdev->dev,
"aliveness settled after %d msecs\n", t);
return t;
@@ -223,6 +224,7 @@ static int mei_txe_aliveness_poll(struct mei_device *dev, u32 expected)
t += MSEC_PER_SEC / 5;
} while (t < SEC_ALIVENESS_WAIT_TIMEOUT);
+ dev->pg_event = MEI_PG_EVENT_IDLE;
dev_err(&dev->pdev->dev, "aliveness timed out\n");
return -ETIME;
}
@@ -249,19 +251,22 @@ static int mei_txe_aliveness_wait(struct mei_device *dev, u32 expected)
return 0;
mutex_unlock(&dev->device_lock);
- err = wait_event_timeout(hw->wait_aliveness,
- hw->recvd_aliveness, timeout);
+ err = wait_event_timeout(hw->wait_aliveness_resp,
+ dev->pg_event == MEI_PG_EVENT_RECEIVED, timeout);
mutex_lock(&dev->device_lock);
hw->aliveness = mei_txe_aliveness_get(dev);
ret = hw->aliveness == expected ? 0 : -ETIME;
if (ret)
- dev_err(&dev->pdev->dev, "aliveness timed out");
+ dev_warn(&dev->pdev->dev, "aliveness timed out = %ld aliveness = %d event = %d\n",
+ err, hw->aliveness, dev->pg_event);
else
- dev_dbg(&dev->pdev->dev, "aliveness settled after %d msecs\n",
- jiffies_to_msecs(timeout - err));
- hw->recvd_aliveness = false;
+ dev_dbg(&dev->pdev->dev, "aliveness settled after = %d msec aliveness = %d event = %d\n",
+ jiffies_to_msecs(timeout - err),
+ hw->aliveness, dev->pg_event);
+
+ dev->pg_event = MEI_PG_EVENT_IDLE;
return ret;
}
@@ -280,6 +285,32 @@ int mei_txe_aliveness_set_sync(struct mei_device *dev, u32 req)
}
/**
+ * mei_txe_pg_is_enabled - detect if PG is supported by HW
+ *
+ * @dev: the device structure
+ *
+ * returns: true is pg supported, false otherwise
+ */
+static bool mei_txe_pg_is_enabled(struct mei_device *dev)
+{
+ return true;
+}
+
+/**
+ * mei_txe_pg_state - translate aliveness register value
+ * to the mei power gating state
+ *
+ * @dev: the device structure
+ *
+ * returns: MEI_PG_OFF if aliveness is on and MEI_PG_ON otherwise
+ */
+static inline enum mei_pg_state mei_txe_pg_state(struct mei_device *dev)
+{
+ struct mei_txe_hw *hw = to_txe_hw(dev);
+ return hw->aliveness ? MEI_PG_OFF : MEI_PG_ON;
+}
+
+/**
* mei_txe_input_ready_interrupt_enable - sets the Input Ready Interrupt
*
* @dev: the device structure
@@ -589,7 +620,10 @@ static int mei_txe_write(struct mei_device *dev,
mei_txe_input_ready_interrupt_enable(dev);
if (!mei_txe_is_input_ready(dev)) {
- dev_err(&dev->pdev->dev, "Input is not ready");
+ struct mei_fw_status fw_status;
+ mei_fw_status(dev, &fw_status);
+ dev_err(&dev->pdev->dev, "Input is not ready " FW_STS_FMT "\n",
+ FW_STS_PRM(fw_status));
return -EAGAIN;
}
@@ -960,9 +994,9 @@ irqreturn_t mei_txe_irq_thread_handler(int irq, void *dev_id)
/* Clear the interrupt cause */
dev_dbg(&dev->pdev->dev,
"Aliveness Interrupt: Status: %d\n", hw->aliveness);
- hw->recvd_aliveness = true;
- if (waitqueue_active(&hw->wait_aliveness))
- wake_up(&hw->wait_aliveness);
+ dev->pg_event = MEI_PG_EVENT_RECEIVED;
+ if (waitqueue_active(&hw->wait_aliveness_resp))
+ wake_up(&hw->wait_aliveness_resp);
}
@@ -1008,15 +1042,51 @@ end:
return IRQ_HANDLED;
}
+
+/**
+ * mei_txe_fw_status - retrieve fw status from the pci config space
+ *
+ * @dev: the device structure
+ * @fw_status: fw status registers storage
+ *
+ * returns: 0 on success an error code otherwise
+ */
+static int mei_txe_fw_status(struct mei_device *dev,
+ struct mei_fw_status *fw_status)
+{
+ const u32 pci_cfg_reg[] = {PCI_CFG_TXE_FW_STS0, PCI_CFG_TXE_FW_STS1};
+ int i;
+
+ if (!fw_status)
+ return -EINVAL;
+
+ fw_status->count = 2;
+
+ for (i = 0; i < fw_status->count && i < MEI_FW_STATUS_MAX; i++) {
+ int ret;
+ ret = pci_read_config_dword(dev->pdev,
+ pci_cfg_reg[i], &fw_status->status[i]);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
static const struct mei_hw_ops mei_txe_hw_ops = {
+ .fw_status = mei_txe_fw_status,
.host_is_ready = mei_txe_host_is_ready,
+ .pg_state = mei_txe_pg_state,
+
.hw_is_ready = mei_txe_hw_is_ready,
.hw_reset = mei_txe_hw_reset,
.hw_config = mei_txe_hw_config,
.hw_start = mei_txe_hw_start,
+ .pg_is_enabled = mei_txe_pg_is_enabled,
+
.intr_clear = mei_txe_intr_clear,
.intr_enable = mei_txe_intr_enable,
.intr_disable = mei_txe_intr_disable,
@@ -1034,14 +1104,27 @@ static const struct mei_hw_ops mei_txe_hw_ops = {
};
+#define MEI_CFG_TXE_FW_STS \
+ .fw_status.count = 2, \
+ .fw_status.status[0] = PCI_CFG_TXE_FW_STS0, \
+ .fw_status.status[1] = PCI_CFG_TXE_FW_STS1
+
+const struct mei_cfg mei_txe_cfg = {
+ MEI_CFG_TXE_FW_STS,
+};
+
+
/**
* mei_txe_dev_init - allocates and initializes txe hardware specific structure
*
* @pdev - pci device
+ * @cfg - per device generation config
+ *
* returns struct mei_device * on success or NULL;
*
*/
-struct mei_device *mei_txe_dev_init(struct pci_dev *pdev)
+struct mei_device *mei_txe_dev_init(struct pci_dev *pdev,
+ const struct mei_cfg *cfg)
{
struct mei_device *dev;
struct mei_txe_hw *hw;
@@ -1051,11 +1134,11 @@ struct mei_device *mei_txe_dev_init(struct pci_dev *pdev)
if (!dev)
return NULL;
- mei_device_init(dev);
+ mei_device_init(dev, cfg);
hw = to_txe_hw(dev);
- init_waitqueue_head(&hw->wait_aliveness);
+ init_waitqueue_head(&hw->wait_aliveness_resp);
dev->ops = &mei_txe_hw_ops;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-16 09:01:06 +0000