94 lines
2.6 KiB
C
94 lines
2.6 KiB
C
/* SPDX-License-Identifier: MIT
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*
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* Copyright (c) 2025, NVIDIA CORPORATION. All rights reserved.
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*/
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#include <nvif/chan.h>
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#include <nvif/user.h>
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#include <nvif/push906f.h>
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#include <nvhw/class/cl906f.h>
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/* Limits GPFIFO size to 1MiB, and "main" push buffer size to 64KiB. */
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#define NVIF_CHAN906F_PBPTR_BITS 15
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#define NVIF_CHAN906F_PBPTR_MASK ((1 << NVIF_CHAN906F_PBPTR_BITS) - 1)
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#define NVIF_CHAN906F_GPPTR_SHIFT NVIF_CHAN906F_PBPTR_BITS
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#define NVIF_CHAN906F_GPPTR_BITS (32 - NVIF_CHAN906F_PBPTR_BITS)
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#define NVIF_CHAN906F_GPPTR_MASK ((1 << NVIF_CHAN906F_GPPTR_BITS) - 1)
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#define NVIF_CHAN906F_SEM_RELEASE_SIZE 5
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static int
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nvif_chan906f_sem_release(struct nvif_chan *chan, u64 addr, u32 data)
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{
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struct nvif_push *push = &chan->push;
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int ret;
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ret = PUSH_WAIT(push, NVIF_CHAN906F_SEM_RELEASE_SIZE);
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if (ret)
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return ret;
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PUSH_MTHD(push, NV906F, SEMAPHOREA,
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NVVAL(NV906F, SEMAPHOREA, OFFSET_UPPER, upper_32_bits(addr)),
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SEMAPHOREB, lower_32_bits(addr),
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SEMAPHOREC, data,
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SEMAPHORED,
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NVDEF(NV906F, SEMAPHORED, OPERATION, RELEASE) |
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NVDEF(NV906F, SEMAPHORED, RELEASE_WFI, DIS) |
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NVDEF(NV906F, SEMAPHORED, RELEASE_SIZE, 16BYTE));
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return 0;
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}
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int
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nvif_chan906f_gpfifo_post(struct nvif_chan *chan, u32 gpptr, u32 pbptr)
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{
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return chan->func->sem.release(chan, chan->sema.addr,
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(gpptr << NVIF_CHAN906F_GPPTR_SHIFT) | pbptr);
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}
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u32
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nvif_chan906f_gpfifo_read_get(struct nvif_chan *chan)
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{
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return nvif_rd32(&chan->sema, 0) >> NVIF_CHAN906F_GPPTR_SHIFT;
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}
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u32
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nvif_chan906f_read_get(struct nvif_chan *chan)
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{
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return nvif_rd32(&chan->sema, 0) & NVIF_CHAN906F_PBPTR_MASK;
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}
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static const struct nvif_chan_func
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nvif_chan906f = {
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.push.read_get = nvif_chan906f_read_get,
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.gpfifo.read_get = nvif_chan906f_gpfifo_read_get,
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.gpfifo.push = nvif_chan506f_gpfifo_push,
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.gpfifo.kick = nvif_chan506f_gpfifo_kick,
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.gpfifo.post = nvif_chan906f_gpfifo_post,
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.gpfifo.post_size = NVIF_CHAN906F_SEM_RELEASE_SIZE,
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.sem.release = nvif_chan906f_sem_release,
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};
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int
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nvif_chan906f_ctor_(const struct nvif_chan_func *func, void *userd, void *gpfifo, u32 gpfifo_size,
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void *push, u64 push_addr, u32 push_size, void *sema, u64 sema_addr,
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struct nvif_chan *chan)
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{
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nvif_chan_gpfifo_ctor(func, userd, gpfifo, gpfifo_size, push, push_addr, push_size, chan);
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chan->sema.map.ptr = sema;
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chan->sema.addr = sema_addr;
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return 0;
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}
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int
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nvif_chan906f_ctor(struct nvif_chan *chan, void *userd, void *gpfifo, u32 gpfifo_size,
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void *push, u64 push_addr, u32 push_size, void *sema, u64 sema_addr)
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{
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return nvif_chan906f_ctor_(&nvif_chan906f, userd, gpfifo, gpfifo_size,
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push, push_addr, push_size, sema, sema_addr, chan);
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}
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