[PATCH v3 1/3] ufs: core: Add Event Specific Interrupt configuration vendor specific ops

[Can Guo <quic_cang@xxxxxxxxxxx>]

As Event Specific Interrupt message format is not defined in UFSHCI JEDEC
specs, and the ESI handling highly depends on how the format is designed,
hence add a vendor specific ops such that SoC vendors can configure their
own ESI handlers. If ESI vops is not provided or returning error, go with
the legacy (central) interrupt way.

Signed-off-by: Can Guo <quic_cang@xxxxxxxxxxx>
Reviewed-by: Bart Van Assche <bvanassche@xxxxxxx>
---
 drivers/ufs/core/ufshcd-priv.h | 8 ++++++++
 drivers/ufs/core/ufshcd.c      | 5 +++++
 include/ufs/ufshcd.h           | 2 ++
 3 files changed, 15 insertions(+)

diff --git a/drivers/ufs/core/ufshcd-priv.h b/drivers/ufs/core/ufshcd-priv.h
index ff03aa5..802029e 100644
--- a/drivers/ufs/core/ufshcd-priv.h
+++ b/drivers/ufs/core/ufshcd-priv.h
@@ -276,6 +276,14 @@ static inline int ufshcd_vops_get_outstanding_cqs(struct ufs_hba *hba,
 	return -EOPNOTSUPP;
 }
 
+static inline int ufshcd_mcq_vops_config_esi(struct ufs_hba *hba)
+{
+	if (hba->vops && hba->vops->config_esi)
+		return hba->vops->config_esi(hba);
+
+	return -EOPNOTSUPP;
+}
+
 extern const struct ufs_pm_lvl_states ufs_pm_lvl_states[];
 
 /**
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index e9d6891..3762dca 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -8375,6 +8375,11 @@ static int ufshcd_alloc_mcq(struct ufs_hba *hba)
 
 static void ufshcd_config_mcq(struct ufs_hba *hba)
 {
+	int ret;
+
+	ret = ufshcd_mcq_vops_config_esi(hba);
+	dev_info(hba->dev, "ESI %sconfigured\n", ret ? "is not " : "");
+
 	ufshcd_enable_intr(hba, UFSHCD_ENABLE_MCQ_INTRS);
 	ufshcd_mcq_make_queues_operational(hba);
 	ufshcd_mcq_config_mac(hba, hba->nutrs);
diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h
index f20557b..7f0139b 100644
--- a/include/ufs/ufshcd.h
+++ b/include/ufs/ufshcd.h
@@ -302,6 +302,7 @@ struct ufs_pwr_mode_info {
  * @get_hba_mac: called to get vendor specific mac value, mandatory for mcq mode
  * @op_runtime_config: called to config Operation and runtime regs Pointers
  * @get_outstanding_cqs: called to get outstanding completion queues
+ * @config_esi: called to config Event Specific Interrupt
  */
 struct ufs_hba_variant_ops {
 	const char *name;
@@ -345,6 +346,7 @@ struct ufs_hba_variant_ops {
 	int	(*op_runtime_config)(struct ufs_hba *hba);
 	int	(*get_outstanding_cqs)(struct ufs_hba *hba,
 				       unsigned long *ocqs);
+	int	(*config_esi)(struct ufs_hba *hba);
 };
 
 /* clock gating state  */
-- 
2.7.4