[PATCH v5 06/10] drivers: qcom: rpmh-rsc: allow invalidation of sleep/wake TCS

Lina Iyer
2018-04-05T16:18:58Z

Allow sleep and wake commands to be cleared from the respective TCSes,
so that they can be re-populated.

Signed-off-by: Lina Iyer <ilina@codeaurora.org>
---

Changes in v4:
- refactored the rphm_rsc_invalidate()
---
drivers/soc/qcom/rpmh-internal.h | 1 +
drivers/soc/qcom/rpmh-rsc.c | 48 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 49 insertions(+)

diff --git a/drivers/soc/qcom/rpmh-internal.h b/drivers/soc/qcom/rpmh-internal.h
index 638662721086..3fab86a01f14 100644
--- a/drivers/soc/qcom/rpmh-internal.h
+++ b/drivers/soc/qcom/rpmh-internal.h
@@ -92,6 +92,7 @@ struct rsc_drv {
int rpmh_rsc_send_data(struct rsc_drv *drv, const struct tcs_request *msg);
int rpmh_rsc_write_ctrl_data(struct rsc_drv *drv,
const struct tcs_request *msg);
+int rpmh_rsc_invalidate(struct rsc_drv *drv);

void rpmh_tx_done(const struct tcs_request *msg, int r);

diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c
index 58fc7254b6f3..1dbccc4d0605 100644
--- a/drivers/soc/qcom/rpmh-rsc.c
+++ b/drivers/soc/qcom/rpmh-rsc.c
@@ -162,6 +162,54 @@ static struct tcs_group *get_tcs_of_type(struct rsc_drv *drv, int type)
return tcs;
}

+static int __tcs_invalidate(struct rsc_drv *drv, int type)
+{
+ int m;
+ struct tcs_group *tcs;
+
+ tcs = get_tcs_of_type(drv, type);
+ if (IS_ERR(tcs))
+ return PTR_ERR(tcs);
+
+ spin_lock(&tcs->lock);
+ if (bitmap_empty(tcs->slots, MAX_TCS_SLOTS)) {
+ spin_unlock(&tcs->lock);
+ return 0;
+ }
+
+ for (m = tcs->offset; m < tcs->offset + tcs->num_tcs; m++) {
+ if (!tcs_is_free(drv, m)) {
+ spin_unlock(&tcs->lock);
+ return -EAGAIN;
+ }
+ write_tcs_reg_sync(drv, RSC_DRV_CMD_ENABLE, m, 0, 0);
+ bitmap_zero(tcs->slots, MAX_TCS_SLOTS);
+ }
+ spin_unlock(&tcs->lock);
+
+ return 0;
+}
+
+/**
+ * rpmh_rsc_invalidate - Invalidate sleep and wake TCSes
+ *
+ * @drv: the mailbox controller
+ */
+int rpmh_rsc_invalidate(struct rsc_drv *drv)
+{
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&drv->drv_lock, flags);
+ ret = __tcs_invalidate(drv, SLEEP_TCS);
+ if (!ret)
+ ret = __tcs_invalidate(drv, WAKE_TCS);
+ spin_unlock_irqrestore(&drv->drv_lock, flags);
+
+ return ret;
+}
+EXPORT_SYMBOL(rpmh_rsc_invalidate);
+
static struct tcs_group *get_tcs_for_msg(struct rsc_drv *drv,
const struct tcs_request *msg)
{
--
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