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abbda4e63b
This needs to be DMA-able data because it's eventually passed to the host1x CDMA. Bug 200768479 Signed-off-by: Thierry Reding <treding@nvidia.com> Change-Id: Ia209c9fac79e3edf3590288fc0739bc803609bc2 Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2596396 (cherry picked from commit 4e064281d0bc8371e228b03386c128661a1a52a9) Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2620150 Tested-by: Jonathan Hunter <jonathanh@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> Reviewed-by: Jonathan Hunter <jonathanh@nvidia.com> Reviewed-by: svc_kernel_abi <svc_kernel_abi@nvidia.com> Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> GVS: Gerrit_Virtual_Submit
83 lines
1.7 KiB
C
83 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* Copyright (c) 2020 NVIDIA Corporation */
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#include <linux/scatterlist.h>
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#include <linux/slab.h>
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#include "gather_bo.h"
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static struct host1x_bo *gather_bo_get(struct host1x_bo *host_bo)
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{
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struct gather_bo *bo = container_of(host_bo, struct gather_bo, base);
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kref_get(&bo->ref);
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return host_bo;
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}
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static void gather_bo_release(struct kref *ref)
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{
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struct gather_bo *bo = container_of(ref, struct gather_bo, ref);
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dma_free_attrs(bo->dev, bo->gather_data_words * 4, bo->gather_data, bo->gather_data_dma,
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0);
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kfree(bo);
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}
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void gather_bo_put(struct host1x_bo *host_bo)
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{
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struct gather_bo *bo = container_of(host_bo, struct gather_bo, base);
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kref_put(&bo->ref, gather_bo_release);
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}
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static struct sg_table *
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gather_bo_pin(struct device *dev, struct host1x_bo *host_bo, dma_addr_t *phys)
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{
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struct gather_bo *bo = container_of(host_bo, struct gather_bo, base);
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struct sg_table *sgt;
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int err;
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sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
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if (!sgt)
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return ERR_PTR(-ENOMEM);
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err = sg_alloc_table(sgt, 1, GFP_KERNEL);
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if (err) {
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kfree(sgt);
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return ERR_PTR(err);
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}
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sg_init_one(sgt->sgl, bo->gather_data, bo->gather_data_words*4);
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return sgt;
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}
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static void gather_bo_unpin(struct device *dev, struct sg_table *sgt)
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{
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if (sgt) {
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sg_free_table(sgt);
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kfree(sgt);
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}
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}
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static void *gather_bo_mmap(struct host1x_bo *host_bo)
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{
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struct gather_bo *bo = container_of(host_bo, struct gather_bo, base);
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return bo->gather_data;
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}
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static void gather_bo_munmap(struct host1x_bo *host_bo, void *addr)
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{
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}
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const struct host1x_bo_ops gather_bo_ops = {
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.get = gather_bo_get,
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.put = gather_bo_put,
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.pin = gather_bo_pin,
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.unpin = gather_bo_unpin,
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.mmap = gather_bo_mmap,
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.munmap = gather_bo_munmap,
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};
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