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| author | Tomas Winkler <tomas.winkler@intel.com> | 2018-11-22 13:11:36 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-26 16:59:48 +0100 |
| commit | ce0925e8c2f85f6bbf5d24b56621336cceaf743d (patch) | |
| tree | 0e97e539e9fb5ebde9f49ae32ffbd3e8ec7055c2 /drivers/misc/mei/mei_dev.h | |
| parent | 986fb2e0532b1b0fa1e8312fbc38b9e7ed826547 (diff) | |
| download | lwn-ce0925e8c2f85f6bbf5d24b56621336cceaf743d.tar.gz lwn-ce0925e8c2f85f6bbf5d24b56621336cceaf743d.zip | |
mei: dma ring buffers allocation
Allocate DMA ring buffers from managed coherent memory.
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@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 | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index 377397e1b5a5..a6796e3f712b 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -122,6 +122,19 @@ struct mei_msg_data { unsigned char *data; }; +/** + * struct mei_dma_dscr - dma address descriptor + * + * @vaddr: dma buffer virtual address + * @daddr: dma buffer physical address + * @size : dma buffer size + */ +struct mei_dma_dscr { + void *vaddr; + dma_addr_t daddr; + size_t size; +}; + /* Maximum number of processed FW status registers */ #define MEI_FW_STATUS_MAX 6 /* Minimal buffer for FW status string (8 bytes in dw + space or '\0') */ @@ -409,6 +422,7 @@ struct mei_fw_version { * @rd_msg_hdr : read message header storage * * @hbuf_is_ready : query if the host host/write buffer is ready + * @dr_dscr: DMA ring descriptors: TX, RX, and CTRL * * @version : HBM protocol version in use * @hbm_f_pg_supported : hbm feature pgi protocol @@ -488,6 +502,8 @@ struct mei_device { /* write buffer */ bool hbuf_is_ready; + struct mei_dma_dscr dr_dscr[DMA_DSCR_NUM]; + struct hbm_version version; unsigned int hbm_f_pg_supported:1; unsigned int hbm_f_dc_supported:1; @@ -578,6 +594,10 @@ int mei_restart(struct mei_device *dev); void mei_stop(struct mei_device *dev); void mei_cancel_work(struct mei_device *dev); +int mei_dmam_ring_alloc(struct mei_device *dev); +void mei_dmam_ring_free(struct mei_device *dev); +bool mei_dma_ring_is_allocated(struct mei_device *dev); + /* * MEI interrupt functions prototype */ |