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176 lines
7.4 KiB
C
176 lines
7.4 KiB
C
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/*
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* Copyright (C) 2014 Freescale Semiconductor
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef _FSL_QBMAN_PORTAL_H
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#define _FSL_QBMAN_PORTAL_H
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#include <fsl-mc/fsl_qbman_base.h>
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/* Create and destroy a functional object representing the given QBMan portal
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* descriptor. */
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struct qbman_swp *qbman_swp_init(const struct qbman_swp_desc *);
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/************/
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/* Dequeues */
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/************/
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/* See the QBMan driver API documentation for details on the enqueue
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* mechanisms. NB: the use of a 'ldpaa_' prefix for this type is because it is
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* primarily used by the "DPIO" layer that sits above (and hides) the QBMan
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* driver. The structure is defined in the DPIO interface, but to avoid circular
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* dependencies we just pre/re-declare it here opaquely. */
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struct ldpaa_dq;
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/* ------------------- */
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/* Pull-mode dequeuing */
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/* ------------------- */
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struct qbman_pull_desc {
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uint32_t dont_manipulate_directly[6];
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};
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/* Clear the contents of a descriptor to default/starting state. */
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void qbman_pull_desc_clear(struct qbman_pull_desc *);
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/* If not called, or if called with 'storage' as NULL, the result pull dequeues
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* will produce results to DQRR. If 'storage' is non-NULL, then results are
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* produced to the given memory location (using the physical/DMA address which
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* the caller provides in 'storage_phys'), and 'stash' controls whether or not
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* those writes to main-memory express a cache-warming attribute. */
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void qbman_pull_desc_set_storage(struct qbman_pull_desc *,
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struct ldpaa_dq *storage,
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dma_addr_t storage_phys,
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int stash);
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/* numframes must be between 1 and 16, inclusive */
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void qbman_pull_desc_set_numframes(struct qbman_pull_desc *, uint8_t numframes);
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/* token is the value that shows up in the dequeue results that can be used to
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* detect when the results have been published, and is not really used when
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* dequeue results go to DQRR. The easiest technique is to zero result "storage"
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* before issuing a pull dequeue, and use any non-zero 'token' value. */
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void qbman_pull_desc_set_token(struct qbman_pull_desc *, uint8_t token);
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/* Exactly one of the following descriptor "actions" should be set. (Calling any
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* one of these will replace the effect of any prior call to one of these.)
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* - pull dequeue from the given frame queue (FQ)
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* - pull dequeue from any FQ in the given work queue (WQ)
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* - pull dequeue from any FQ in any WQ in the given channel
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*/
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void qbman_pull_desc_set_fq(struct qbman_pull_desc *, uint32_t fqid);
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/* Issue the pull dequeue command */
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int qbman_swp_pull(struct qbman_swp *, struct qbman_pull_desc *);
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/* -------------------------------- */
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/* Polling DQRR for dequeue results */
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/* -------------------------------- */
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/* NULL return if there are no unconsumed DQRR entries. Returns a DQRR entry
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* only once, so repeated calls can return a sequence of DQRR entries, without
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* requiring they be consumed immediately or in any particular order. */
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const struct ldpaa_dq *qbman_swp_dqrr_next(struct qbman_swp *);
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/* Consume DQRR entries previously returned from qbman_swp_dqrr_next(). */
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void qbman_swp_dqrr_consume(struct qbman_swp *, const struct ldpaa_dq *);
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/* ------------------------------------------------- */
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/* Polling user-provided storage for dequeue results */
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/* ------------------------------------------------- */
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/* Only used for user-provided storage of dequeue results, not DQRR. Prior to
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* being used, the storage must set "oldtoken", so that the driver notices when
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* hardware has filled it in with results using a "newtoken". NB, for efficiency
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* purposes, the driver will perform any required endianness conversion to
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* ensure that the user's dequeue result storage is in host-endian format
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* (whether or not that is the same as the little-endian format that hardware
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* DMA'd to the user's storage). As such, once the user has called
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* qbman_dq_entry_has_newtoken() and been returned a valid dequeue result, they
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* should not call it again on the same memory location (except of course if
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* another dequeue command has been executed to produce a new result to that
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* location).
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*/
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void qbman_dq_entry_set_oldtoken(struct ldpaa_dq *,
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unsigned int num_entries,
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uint8_t oldtoken);
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int qbman_dq_entry_has_newtoken(struct qbman_swp *,
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const struct ldpaa_dq *,
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uint8_t newtoken);
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/* -------------------------------------------------------- */
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/* Parsing dequeue entries (DQRR and user-provided storage) */
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/* -------------------------------------------------------- */
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/* DQRR entries may contain non-dequeue results, ie. notifications */
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int qbman_dq_entry_is_DQ(const struct ldpaa_dq *);
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/************/
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/* Enqueues */
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/************/
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struct qbman_eq_desc {
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uint32_t dont_manipulate_directly[8];
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};
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/* Clear the contents of a descriptor to default/starting state. */
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void qbman_eq_desc_clear(struct qbman_eq_desc *);
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/* Exactly one of the following descriptor "actions" should be set. (Calling
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* any one of these will replace the effect of any prior call to one of these.)
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* - enqueue without order-restoration
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* - enqueue with order-restoration
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* - fill a hole in the order-restoration sequence, without any enqueue
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* - advance NESN (Next Expected Sequence Number), without any enqueue
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* 'respond_success' indicates whether an enqueue response should be DMA'd
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* after success (otherwise a response is DMA'd only after failure).
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* 'incomplete' indicates that other fragments of the same 'seqnum' are yet to
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* be enqueued.
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*/
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void qbman_eq_desc_set_no_orp(struct qbman_eq_desc *, int respond_success);
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void qbman_eq_desc_set_response(struct qbman_eq_desc *,
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dma_addr_t storage_phys,
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int stash);
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/* token is the value that shows up in an enqueue response that can be used to
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* detect when the results have been published. The easiest technique is to zero
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* result "storage" before issuing an enqueue, and use any non-zero 'token'
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* value. */
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void qbman_eq_desc_set_token(struct qbman_eq_desc *, uint8_t token);
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/* Exactly one of the following descriptor "targets" should be set. (Calling any
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* one of these will replace the effect of any prior call to one of these.)
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* - enqueue to a frame queue
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* - enqueue to a queuing destination
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* Note, that none of these will have any affect if the "action" type has been
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* set to "orp_hole" or "orp_nesn".
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*/
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void qbman_eq_desc_set_fq(struct qbman_eq_desc *, uint32_t fqid);
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void qbman_eq_desc_set_qd(struct qbman_eq_desc *, uint32_t qdid,
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uint32_t qd_bin, uint32_t qd_prio);
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/* Issue an enqueue command. ('fd' should only be NULL if the "action" of the
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* descriptor is "orp_hole" or "orp_nesn".) */
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int qbman_swp_enqueue(struct qbman_swp *, const struct qbman_eq_desc *,
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const struct qbman_fd *fd);
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/*******************/
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/* Buffer releases */
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/*******************/
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struct qbman_release_desc {
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uint32_t dont_manipulate_directly[1];
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};
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/* Clear the contents of a descriptor to default/starting state. */
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void qbman_release_desc_clear(struct qbman_release_desc *);
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/* Set the ID of the buffer pool to release to */
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void qbman_release_desc_set_bpid(struct qbman_release_desc *, uint32_t bpid);
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/* Issue a release command. 'num_buffers' must be less than 8. */
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int qbman_swp_release(struct qbman_swp *, const struct qbman_release_desc *,
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const uint64_t *buffers, unsigned int num_buffers);
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/*******************/
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/* Buffer acquires */
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/*******************/
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int qbman_swp_acquire(struct qbman_swp *, uint32_t bpid, uint64_t *buffers,
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unsigned int num_buffers);
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#endif /* !_FSL_QBMAN_PORTAL_H */
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