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bf4afc53b7
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
145 lines
3.5 KiB
C
145 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2017-2018 Etnaviv Project
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*/
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#include <linux/dma-mapping.h>
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#include "etnaviv_cmdbuf.h"
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#include "etnaviv_gem.h"
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#include "etnaviv_gpu.h"
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#include "etnaviv_mmu.h"
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#define SUBALLOC_SIZE SZ_512K
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#define SUBALLOC_GRANULE SZ_4K
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#define SUBALLOC_GRANULES (SUBALLOC_SIZE / SUBALLOC_GRANULE)
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struct etnaviv_cmdbuf_suballoc {
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/* suballocated dma buffer properties */
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struct device *dev;
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void *vaddr;
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dma_addr_t paddr;
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/* allocation management */
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struct mutex lock;
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DECLARE_BITMAP(granule_map, SUBALLOC_GRANULES);
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int free_space;
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wait_queue_head_t free_event;
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};
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struct etnaviv_cmdbuf_suballoc *
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etnaviv_cmdbuf_suballoc_new(struct device *dev)
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{
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struct etnaviv_cmdbuf_suballoc *suballoc;
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int ret;
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suballoc = kzalloc_obj(*suballoc);
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if (!suballoc)
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return ERR_PTR(-ENOMEM);
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suballoc->dev = dev;
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mutex_init(&suballoc->lock);
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init_waitqueue_head(&suballoc->free_event);
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BUILD_BUG_ON(ETNAVIV_SOFTPIN_START_ADDRESS < SUBALLOC_SIZE);
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suballoc->vaddr = dma_alloc_wc(dev, SUBALLOC_SIZE,
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&suballoc->paddr, GFP_KERNEL);
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if (!suballoc->vaddr) {
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ret = -ENOMEM;
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goto free_suballoc;
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}
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return suballoc;
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free_suballoc:
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mutex_destroy(&suballoc->lock);
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kfree(suballoc);
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return ERR_PTR(ret);
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}
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int etnaviv_cmdbuf_suballoc_map(struct etnaviv_cmdbuf_suballoc *suballoc,
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struct etnaviv_iommu_context *context,
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struct etnaviv_vram_mapping *mapping,
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u32 memory_base)
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{
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return etnaviv_iommu_get_suballoc_va(context, mapping, memory_base,
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suballoc->paddr, SUBALLOC_SIZE);
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}
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void etnaviv_cmdbuf_suballoc_unmap(struct etnaviv_iommu_context *context,
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struct etnaviv_vram_mapping *mapping)
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{
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etnaviv_iommu_put_suballoc_va(context, mapping);
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}
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void etnaviv_cmdbuf_suballoc_destroy(struct etnaviv_cmdbuf_suballoc *suballoc)
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{
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dma_free_wc(suballoc->dev, SUBALLOC_SIZE, suballoc->vaddr,
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suballoc->paddr);
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mutex_destroy(&suballoc->lock);
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kfree(suballoc);
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}
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int etnaviv_cmdbuf_init(struct etnaviv_cmdbuf_suballoc *suballoc,
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struct etnaviv_cmdbuf *cmdbuf, u32 size)
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{
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int granule_offs, order, ret;
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cmdbuf->suballoc = suballoc;
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cmdbuf->size = size;
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order = order_base_2(ALIGN(size, SUBALLOC_GRANULE) / SUBALLOC_GRANULE);
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retry:
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mutex_lock(&suballoc->lock);
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granule_offs = bitmap_find_free_region(suballoc->granule_map,
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SUBALLOC_GRANULES, order);
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if (granule_offs < 0) {
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suballoc->free_space = 0;
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mutex_unlock(&suballoc->lock);
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ret = wait_event_interruptible_timeout(suballoc->free_event,
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suballoc->free_space,
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secs_to_jiffies(10));
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if (!ret) {
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dev_err(suballoc->dev,
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"Timeout waiting for cmdbuf space\n");
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return -ETIMEDOUT;
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}
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goto retry;
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}
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mutex_unlock(&suballoc->lock);
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cmdbuf->suballoc_offset = granule_offs * SUBALLOC_GRANULE;
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cmdbuf->vaddr = suballoc->vaddr + cmdbuf->suballoc_offset;
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return 0;
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}
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void etnaviv_cmdbuf_free(struct etnaviv_cmdbuf *cmdbuf)
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{
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struct etnaviv_cmdbuf_suballoc *suballoc = cmdbuf->suballoc;
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int order = order_base_2(ALIGN(cmdbuf->size, SUBALLOC_GRANULE) /
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SUBALLOC_GRANULE);
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if (!suballoc)
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return;
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mutex_lock(&suballoc->lock);
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bitmap_release_region(suballoc->granule_map,
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cmdbuf->suballoc_offset / SUBALLOC_GRANULE,
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order);
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suballoc->free_space = 1;
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mutex_unlock(&suballoc->lock);
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wake_up_all(&suballoc->free_event);
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}
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u32 etnaviv_cmdbuf_get_va(struct etnaviv_cmdbuf *buf,
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struct etnaviv_vram_mapping *mapping)
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{
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return mapping->iova + buf->suballoc_offset;
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}
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dma_addr_t etnaviv_cmdbuf_get_pa(struct etnaviv_cmdbuf *buf)
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{
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return buf->suballoc->paddr + buf->suballoc_offset;
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}
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