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https://github.com/AsahiLinux/u-boot
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
174 lines
7.4 KiB
C
174 lines
7.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2014 Freescale Semiconductor
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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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