msm: gsi: update channel scratch structures

Update channel scratch data structure according
to GSI ver 83.

CRs-Fixed: 1000819
Change-Id: I428963f9cd7885015e5185ef6c666bf26e0851bb
Acked-by: Ady Abraham <adya@qti.qualcomm.com>
Signed-off-by: Skylar Chang <chiaweic@codeaurora.org>

1 files changed, 44 insertions, 12 deletions

diff --git a/include/linux/msm_gsi.h b/include/linux/msm_gsi.h
index d83cb701bf1b..c95a529b029b 100644
--- a/include/linux/msm_gsi.h
+++ b/include/linux/msm_gsi.h
@@ -412,6 +412,33 @@ struct gsi_xfer_elem {
 };
 
 /**
+ * gsi_gpi_channel_scratch - GPI protocol SW config area of
+ * channel scratch
+ *
+ * @max_outstanding_tre: Used for the prefetch management sequence by the
+ *                       sequencer. Defines the maximum number of allowed
+ *                       outstanding TREs in IPA/GSI (in Bytes). RE engine
+ *                       prefetch will be limited by this configuration. It
+ *                       is suggested to configure this value to IPA_IF
+ *                       channel TLV queue size times element size. To disable
+ *                       the feature in doorbell mode (DB Mode=1). Maximum
+ *                       outstanding TREs should be set to 64KB
+ *                       (or any value larger or equal to ring length . RLEN)
+ * @outstanding_threshold: Used for the prefetch management sequence by the
+ *                       sequencer. Defines the threshold (in Bytes) as to when
+ *                       to update the channel doorbell. Should be smaller than
+ *                       Maximum outstanding TREs. value. It is suggested to
+ *                       configure this value to 2 * element size.
+ */
+struct __packed gsi_gpi_channel_scratch {
+	uint64_t resvd1;
+	uint32_t resvd2:16;
+	uint32_t max_outstanding_tre:16;
+	uint32_t resvd3:16;
+	uint32_t outstanding_threshold:16;
+};
+
+/**
  * gsi_mhi_channel_scratch - MHI protocol SW config area of
  * channel scratch
  *
@@ -443,15 +470,17 @@ struct gsi_xfer_elem {
  *                       sequencer. Defines the maximum number of allowed
  *                       outstanding TREs in IPA/GSI (in Bytes). RE engine
  *                       prefetch will be limited by this configuration. It
- *                       is suggested to configure this value with the IPA_IF
- *                       channel AOS queue size. To disable the feature in
- *                       doorbell mode (DB Mode=1) Maximum outstanding TREs
- *                       should be set to 64KB (or any value larger or equal
- *                       to ring length . RLEN)
+ *                       is suggested to configure this value to IPA_IF
+ *                       channel TLV queue size times element size.
+ *                       To disable the feature in doorbell mode (DB Mode=1).
+ *                       Maximum outstanding TREs should be set to 64KB
+ *                       (or any value larger or equal to ring length . RLEN)
  * @outstanding_threshold: Used for the prefetch management sequence by the
  *                       sequencer. Defines the threshold (in Bytes) as to when
  *                       to update the channel doorbell. Should be smaller than
- *                       Maximum outstanding TREs. value.
+ *                       Maximum outstanding TREs. value. It is suggested to
+ *                       configure this value to min(TLV_FIFO_SIZE/2,8) *
+ *                       element size.
  */
 struct __packed gsi_mhi_channel_scratch {
 	uint64_t mhi_host_wp_addr;
@@ -484,16 +513,18 @@ struct __packed gsi_mhi_channel_scratch {
  *                       sequencer. Defines the maximum number of allowed
  *                       outstanding TREs in IPA/GSI (in Bytes). RE engine
  *                       prefetch will be limited by this configuration. It
- *                       is suggested to configure this value with the IPA_IF
- *                       channel AOS queue size. To disable the feature in
- *                       doorbell mode (DB Mode=1) Maximum outstanding TREs
- *                       should be set to 64KB (or any value larger or equal
- *                       to ring length . RLEN)
+ *                       is suggested to configure this value to IPA_IF
+ *                       channel TLV queue size times element size.
+ *                       To disable the feature in doorbell mode (DB Mode=1)
+ *                       Maximum outstanding TREs should be set to 64KB
+ *                       (or any value larger or equal to ring length . RLEN)
  * @depcmd_hi_addr: Used to generate "Update Transfer" command
  * @outstanding_threshold: Used for the prefetch management sequence by the
  *                       sequencer. Defines the threshold (in Bytes) as to when
  *                       to update the channel doorbell. Should be smaller than
- *                       Maximum outstanding TREs. value.
+ *                       Maximum outstanding TREs. value. It is suggested to
+ *                       configure this value to 2 * element size. for MBIM the
+ *                       suggested configuration is the element size.
  */
 struct __packed gsi_xdci_channel_scratch {
 	uint32_t last_trb_addr:16;
@@ -513,6 +544,7 @@ struct __packed gsi_xdci_channel_scratch {
  *
  */
 union __packed gsi_channel_scratch {
+	struct __packed gsi_gpi_channel_scratch gpi;
 	struct __packed gsi_mhi_channel_scratch mhi;
 	struct __packed gsi_xdci_channel_scratch xdci;
 	struct __packed {