bnxt_re/lib: Support direct verbs #1654
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Introduce a new logging function and new enviornment variables
to control it. This will be used in subsequent patches for
debug logging.
Below environment variables are supported.
BNXT_DEBUG_FILE:
User can provide absolute file location that will
be used for logging the prints from library code.
Default path is – “/var/log/messages”
BNXT_DEBUG_MASK:
Set this value to log direct verbs related information.
BNXT_DUMP_DV = 1
Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com>
Reviewed-by: Damodharam Ammepalli <damodharam.ammepalli@broadcom.com>
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
To commit: ?? ("RDMA/bnxt_re: Direct Verbs: Support CQ and QP verbs").
Signed-off-by: Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com>
The following Direct Verb (DV) APIs have been implemented in this patch. Doorbell Region Direct Verbs: ----------------------------- - bnxt_re_dv_alloc_db_region(): This will allow the appliation to create extra doorbell regions and use the associated doorbell page index in dv_create_qp() and use the associated DB address while ringing the doorbell. - bnxt_re_dv_free_db_region(): Free the allocated doorbell region. - bnxt_re_dv_get_default_db_region(): Return the default doorbell page index and doorbell page address associated with the ucontext. Umem Registration Direct Verbs: ------------------------------- - bnxt_re_dv_umem_reg(): Register the user memory to be used by the application with the library. Application can register a large chunk of memory and use it during subsequent resource creation DV APIs. Note that the API terminates in the library and the app specified memory params (addr, len) are saved and a umem-handle is returned. That is, there is no ioctl to the driver at this point to map/pin the user memory. This memory is mapped/pinned later when the application creates the required resources (CQ/QP) using respective direct verbs. This is implemented in the next patch in this series. - bnxt_re_dv_umem_dereg(): Deregister the user memory specified by the umem-handle. Co-developed-by: Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com> Signed-off-by: Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com> Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com> Reviewed-by: Selvin Thyparampil Xavier <selvin.xavier@broadcom.com>
The following Direct Verb (DV) APIs have been implemented in this patch. These are implemented by enhancing the driver specific udata in existing verbs. CQ Direct Verbs: ---------------- - bnxt_re_dv_create_cq(): Create a CQ of requested size (cqe). The application must have already registered this memory using bnxt_re_dv_umem_reg(). The CQ umem-handle and umem-offset provided by the application are translated into an address for mapping and passed to the driver. - bnxt_re_dv_destroy_cq(): Destroy the DV_CQ created earlier. QP Direct Verbs: ---------------- - bnxt_re_dv_create_qp(): Create a QP using specified params (struct bnxt_re_dv_qp_init_attr). The application must have already registered SQ/RQ memory using bnxt_re_dv_umem_reg(). The SQ/RQ umem-handle and umem-offset provided by the application are translated into an address for mapping and passed to the driver. - bnxt_re_dv_destroy_qp(): Destroy the DV_QP created earlier. - bnxt_re_dv_modify_qp(): Modify QP attributes of the DV_QP. - bnxt_re_dv_query_qp(): Return QP attributes of the DV_QP. Note: ----- Some applications might want to allocate memory for all resources of a given type (CQ/QP) in one big chunk and then register that entire memory once using dv_umem_reg(). At the time of creating each individual resource, the application should pass a specific offset/length in the umem registered memory. Signed-off-by: Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com> Co-developed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com> Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com> Co-developed-by: Selvin Xavier <selvin.xavier@broadcom.com> Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
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Hi,
This patchset supports Direct Verbs in the bnxt_re library.
This is required by vendor specific applications that need to manage
the HW resources directly and to implement the datapath in the
application.
To support this, the library and the driver are being enhanced to
provide Direct Verbs using which the application can allocate and
manage the HW resources (Queues, Doorbell etc) . The Direct Verbs
enable the application to implement the control path.
Patch#1 Support debug logging
Patch#2 Update kernel headers
Patch#3 Support dbr and umem direct verbs
Patch#4 Support cq and qp direct verbs
Thanks,
-Harsha