diff options
| author | Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> | 2022-04-05 19:27:40 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-26 13:17:41 +0200 |
| commit | e9e4da23cd65ea76ba658346f5c182791bd1cea9 (patch) | |
| tree | 66ceb34aeb81a72c7d29a16655689e7016d81d8f /include/linux/mhi_ep.h | |
| parent | 297c77a0f27312b9a04696018c4cbd47926ca92b (diff) | |
bus: mhi: ep: Add support for managing MMIO registers
Add support for managing the Memory Mapped Input Output (MMIO) registers
of the MHI bus. All MHI operations are carried out using the MMIO registers
by both host and the endpoint device.
The MMIO registers reside inside the endpoint device memory (fixed
location based on the platform) and the address is passed by the MHI EP
controller driver during its registration.
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20220405135754.6622-5-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/mhi_ep.h')
| -rw-r--r-- | include/linux/mhi_ep.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/mhi_ep.h b/include/linux/mhi_ep.h index e2b94f9eb846..5db048e258e4 100644 --- a/include/linux/mhi_ep.h +++ b/include/linux/mhi_ep.h @@ -59,6 +59,10 @@ struct mhi_ep_db_info { * @mhi_event: Points to the event ring configurations table * @mhi_cmd: Points to the command ring configurations table * @sm: MHI Endpoint state machine + * @ch_ctx_host_pa: Physical address of host channel context data structure + * @ev_ctx_host_pa: Physical address of host event context data structure + * @cmd_ctx_host_pa: Physical address of host command context data structure + * @chdb: Array of channel doorbell interrupt info * @raise_irq: CB function for raising IRQ to the host * @alloc_map: CB function for allocating memory in endpoint for storing host context and mapping it * @unmap_free: CB function to unmap and free the allocated memory in endpoint for storing host context @@ -67,6 +71,10 @@ struct mhi_ep_db_info { * @mhi_state: MHI Endpoint state * @max_chan: Maximum channels supported by the endpoint controller * @mru: MRU (Maximum Receive Unit) value of the endpoint controller + * @event_rings: Number of event rings supported by the endpoint controller + * @hw_event_rings: Number of hardware event rings supported by the endpoint controller + * @chdb_offset: Channel doorbell offset set by the host + * @erdb_offset: Event ring doorbell offset set by the host * @index: MHI Endpoint controller index */ struct mhi_ep_cntrl { @@ -79,6 +87,12 @@ struct mhi_ep_cntrl { struct mhi_ep_cmd *mhi_cmd; struct mhi_ep_sm *sm; + u64 ch_ctx_host_pa; + u64 ev_ctx_host_pa; + u64 cmd_ctx_host_pa; + + struct mhi_ep_db_info chdb[4]; + void (*raise_irq)(struct mhi_ep_cntrl *mhi_cntrl, u32 vector); int (*alloc_map)(struct mhi_ep_cntrl *mhi_cntrl, u64 pci_addr, phys_addr_t *phys_ptr, void __iomem **virt, size_t size); @@ -91,6 +105,10 @@ struct mhi_ep_cntrl { u32 max_chan; u32 mru; + u32 event_rings; + u32 hw_event_rings; + u32 chdb_offset; + u32 erdb_offset; u32 index; }; |