4662e22a99
Rather than individually allocating each ring entry, use two large allocations, one for the hardware descriptors and one for the software descriptor contexts. This allows the use of simple array indexing on the rings and also allows the removal of most of the software descriptor structure, since the necessary information can be retrieved based on the ring index now. Change-Id: I73ef24450f69ca0fc35e350286282c6b1c77a207 Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
104 lines
3.1 KiB
C
104 lines
3.1 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __IOAT_INTERNAL_H__
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#define __IOAT_INTERNAL_H__
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#include "spdk/ioat.h"
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#include "spdk/ioat_spec.h"
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <inttypes.h>
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#include "spdk/queue.h"
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#include "spdk/mmio.h"
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/* Allocate 2 << 15 (32K) descriptors per channel by default. */
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#define IOAT_DEFAULT_ORDER 15
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struct ioat_descriptor {
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ioat_callback_t callback_fn;
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void *callback_arg;
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};
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/* One of these per allocated PCI device. */
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struct ioat_channel {
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SLIST_ENTRY(ioat_channel) next;
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/* Opaque handle to upper layer */
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void *device;
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uint64_t max_xfer_size;
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volatile struct ioat_registers *regs;
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volatile uint64_t *comp_update;
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uint32_t head;
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uint32_t tail;
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uint32_t ring_size_order;
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uint64_t last_seen;
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struct ioat_descriptor *ring;
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struct ioat_dma_hw_descriptor *hw_ring;
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uint64_t hw_ring_phys_addr;
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};
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static inline uint32_t
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is_ioat_active(uint64_t status)
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{
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return (status & IOAT_CHANSTS_STATUS) == IOAT_CHANSTS_ACTIVE;
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}
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static inline uint32_t
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is_ioat_idle(uint64_t status)
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{
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return (status & IOAT_CHANSTS_STATUS) == IOAT_CHANSTS_IDLE;
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}
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static inline uint32_t
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is_ioat_halted(uint64_t status)
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{
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return (status & IOAT_CHANSTS_STATUS) == IOAT_CHANSTS_HALTED;
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}
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static inline uint32_t
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is_ioat_suspended(uint64_t status)
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{
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return (status & IOAT_CHANSTS_STATUS) == IOAT_CHANSTS_SUSPENDED;
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}
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#endif /* __IOAT_INTERNAL_H__ */
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