diff options
| author | Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> | 2022-04-05 19:27:47 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-26 13:17:41 +0200 |
| commit | 7a97b6b47353c60dd1b53ada6180741437e377f2 (patch) | |
| tree | f0d3a78045d00874a38b44cda88b6d2a9a6842d4 /include/linux/mhi_ep.h | |
| parent | 5d507ee04894e166f8c5a29f05c6b06ce91d5833 (diff) | |
bus: mhi: ep: Add support for handling MHI_RESET
Add support for handling MHI_RESET in MHI endpoint stack. MHI_RESET will
be issued by the host during shutdown and during error scenario so that
it can recover the endpoint device without restarting the whole device.
MHI_RESET handling involves resetting the internal MHI registers, data
structures, state machines, resetting all channels/rings and setting
MHICTRL.RESET bit to 0. Additionally the device will also move to READY
state if the reset was due to SYS_ERR.
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20220405135754.6622-12-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 | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/mhi_ep.h b/include/linux/mhi_ep.h index 9da683e8302c..2f31a54c205f 100644 --- a/include/linux/mhi_ep.h +++ b/include/linux/mhi_ep.h @@ -76,6 +76,7 @@ struct mhi_ep_db_info { * @ch_db_list: List of queued channel doorbells * @wq: Dedicated workqueue for handling rings and state changes * @state_work: State transition worker + * @reset_work: Worker for MHI Endpoint reset * @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 @@ -122,6 +123,7 @@ struct mhi_ep_cntrl { struct workqueue_struct *wq; struct work_struct state_work; + struct work_struct reset_work; 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, |