Allow sleep and wake commands to be cleared from the respective TCSes,
so that they can be re-populated.
Signed-off-by: Lina Iyer <il...@codeaurora.org>
---
drivers/soc/qcom/rpmh-internal.h | 1 +
drivers/soc/qcom/rpmh-rsc.c | 46 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 47 insertions(+)
diff --git a/drivers/soc/qcom/rpmh-internal.h b/drivers/soc/qcom/rpmh-internal.h
index 65dfe1716265..d2f73788a24d 100644
--- a/drivers/soc/qcom/rpmh-internal.h
+++ b/drivers/soc/qcom/rpmh-internal.h
@@ -90,6 +90,7 @@ struct rsc_drv {
int rpmh_rsc_send_data(struct rsc_drv *drv, struct tcs_request *msg);
int rpmh_rsc_write_ctrl_data(struct rsc_drv *drv, struct tcs_request *msg);
+int rpmh_rsc_invalidate(struct rsc_drv *drv);
void rpmh_tx_done(struct tcs_request *msg, int r);
diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c
index 34e780d9670f..e9f5a1f387fd 100644
--- a/drivers/soc/qcom/rpmh-rsc.c
+++ b/drivers/soc/qcom/rpmh-rsc.c
@@ -170,6 +170,52 @@ static struct tcs_group *get_tcs_of_type(struct rsc_drv
*drv, int type)
return tcs;
}
+/**
+ * rpmh_rsc_invalidate - Invalidate sleep and wake TCSes
+ *
+ * @drv: the mailbox controller
+ */
+int rpmh_rsc_invalidate(struct rsc_drv *drv)
+{
+ struct tcs_group *tcs;
+ int m, type, ret = 0;
+ int inv_types[] = { WAKE_TCS, SLEEP_TCS };
+ unsigned long drv_flags, flags;
+
+ /* Lock the DRV and clear sleep and wake TCSes */
+ spin_lock_irqsave(&drv->drv_lock, drv_flags);
+ for (type = 0; type < ARRAY_SIZE(inv_types); type++) {
+ tcs = get_tcs_of_type(drv, inv_types[type]);
+ if (IS_ERR(tcs))
+ continue;
+
+ spin_lock_irqsave(&tcs->tcs_lock, flags);
+ if (bitmap_empty(tcs->slots, MAX_TCS_SLOTS)) {
+ spin_unlock_irqrestore(&tcs->tcs_lock, flags);
+ continue;
+ }
+
+ /* Clear the enable register for each TCS of the type */
+ for (m = tcs->tcs_offset;
+ m < tcs->tcs_offset + tcs->num_tcs; m++) {
+ if (!tcs_is_free(drv, m)) {
+ spin_unlock_irqrestore(&tcs->tcs_lock, flags);
+ ret = -EAGAIN;
+ goto drv_unlock;
+ }
+ write_tcs_reg_sync(drv, RSC_DRV_CMD_ENABLE, m, 0, 0);
+ /* Mark the TCS slots as free */
+ bitmap_zero(tcs->slots, MAX_TCS_SLOTS);
+ }
+ spin_unlock_irqrestore(&tcs->tcs_lock, flags);
+ }
+drv_unlock:
+ spin_unlock_irqrestore(&drv->drv_lock, drv_flags);
+
+ return ret;
+}
+EXPORT_SYMBOL(rpmh_rsc_invalidate);
+
static struct tcs_group *get_tcs_for_msg(struct rsc_drv *drv,
struct tcs_request *msg)
{
--
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a Linux Foundation Collaborative Project
