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msm: gsi: Add support for EV RP DDR access feature

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Allocate memory on DDR for event RP and providing it
to the GSI context.
Accessing the event RP using the DDR pointer instead
of reading the GSI register.

Change-Id: Ib25ae4ee8abbc73a74f24d360f64b1295a9d4520
Acked-by: Nadav Levintov <nadavl@qti.qualcomm.com>
Signed-off-by: Sivan Reinstein <sivanr@codeaurora.org>
This commit is contained in:
Sivan Reinstein 2020-04-27 12:10:07 +03:00
commit c8ca64ec05
1 changed files with 7 additions and 2 deletions
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9
include/linux/msm_gsi.h
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@ -176,7 +176,7 @@ enum gsi_evt_ring_elem_size {
* @ring_len: length of ring in bytes (must be integral multiple of
* re_size)
* @ring_base_addr: physical base address of ring. Address must be aligned to
* ring_len rounded to power of two
* ring_len rounded to power of two
* @ring_base_vaddr: virtual base address of ring (set to NULL when not
* applicable)
* @int_modt: cycles base interrupt moderation (32KHz clock)
@ -186,6 +186,8 @@ enum gsi_evt_ring_elem_size {
* @rp_update_addr: physical address to which event read pointer should be
* written on every event generation. must be set to 0 when
* no update is desdired
* @rp_update_vaddr: virtual address of event ring read pointer (set to NULL
* when not applicable)
* @exclusive: if true, only one GSI channel can be associated with this
* event ring. if false, the event ring can be shared among
* multiple GSI channels but in that case no polling
@ -196,6 +198,7 @@ enum gsi_evt_ring_elem_size {
* @evchid: the event ID that is being specifically requested (this is
* relevant for MHI where doorbell routing requires ERs to be
* physically contiguous)
* @gsi_read_event_ring_rp: function reads the value of the event ring RP.
*/
struct gsi_evt_ring_props {
enum gsi_evt_chtype intf;
@ -209,11 +212,14 @@ struct gsi_evt_ring_props {
uint32_t intvec;
uint64_t msi_addr;
uint64_t rp_update_addr;
void *rp_update_vaddr;
bool exclusive;
void (*err_cb)(struct gsi_evt_err_notify *notify);
void *user_data;
bool evchid_valid;
uint8_t evchid;
uint64_t (*gsi_read_event_ring_rp)(struct gsi_evt_ring_props *props,
uint8_t id, int ee);
};
enum gsi_chan_mode {
@ -2021,6 +2027,5 @@ static inline void gsi_wdi3_write_evt_ring_db(
static inline void gsi_wdi3_dump_register(unsigned long chan_hdl)
{
}
#endif /* IS_ENABLED(CONFIG_GSI) */
#endif