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| author | Alexander Usyskin <alexander.usyskin@intel.com> | 2021-02-06 17:43:24 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-02-06 17:48:11 +0300 |
| commit | 369aea84595189200a2e6b028f556a7efa0ec489 (patch) | |
| tree | e2ff0302ffdfd42be31883901a02fd83e9db623c /drivers/misc/mei/mei_dev.h | |
| parent | dfad8742a328598d52d8472ce34fac312f4a5acb (diff) | |
| download | linux-369aea84595189200a2e6b028f556a7efa0ec489.tar.xz | |
mei: implement client dma setup.
Implement HBM message protocol to setup and tear down
DMA buffer on behalf of an client. On top there DMA
buffer allocation and its life time management.
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20210206144325.25682-5-tomas.winkler@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/mei/mei_dev.h')
| -rw-r--r-- | drivers/misc/mei/mei_dev.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index 8ebd32cb2075..b7b6ef344e80 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -79,6 +79,8 @@ enum mei_file_transaction_states { * @MEI_FOP_DISCONNECT_RSP: disconnect response * @MEI_FOP_NOTIFY_START: start notification * @MEI_FOP_NOTIFY_STOP: stop notification + * @MEI_FOP_DMA_MAP: request client dma map + * @MEI_FOP_DMA_UNMAP: request client dma unmap */ enum mei_cb_file_ops { MEI_FOP_READ = 0, @@ -88,6 +90,8 @@ enum mei_cb_file_ops { MEI_FOP_DISCONNECT_RSP, MEI_FOP_NOTIFY_START, MEI_FOP_NOTIFY_STOP, + MEI_FOP_DMA_MAP, + MEI_FOP_DMA_UNMAP, }; /** @@ -113,6 +117,13 @@ struct mei_msg_data { unsigned char *data; }; +struct mei_dma_data { + u8 buffer_id; + void *vaddr; + dma_addr_t daddr; + size_t size; +}; + /** * struct mei_dma_dscr - dma address descriptor * @@ -236,6 +247,8 @@ struct mei_cl_vtag { * @rd_pending: pending read credits * @rd_completed_lock: protects rd_completed queue * @rd_completed: completed read + * @dma: dma settings + * @dma_mapped: dma buffer is currently mapped. * * @cldev: device on the mei client bus */ @@ -263,6 +276,8 @@ struct mei_cl { struct list_head rd_pending; spinlock_t rd_completed_lock; /* protects rd_completed queue */ struct list_head rd_completed; + struct mei_dma_data dma; + u8 dma_mapped; struct mei_cl_device *cldev; }; |