int user_hwctx_set_save(struct user_hwctx *ctx,
ulong mem, u32 offset, u32 words, struct nvhost_reloc *reloc)
{
struct mem_handle *buf;
struct sg_table *sgt;
void *page_addr;
/* First the restore buffer is set, then the save buffer */
if (!ctx->restore || !ctx->restore_sgt)
return -EINVAL;
buf = nvhost_memmgr_get(ctx->hwctx.memmgr,
mem, ctx->hwctx.channel->dev);
if (IS_ERR(buf))
return PTR_ERR(buf);
sgt = nvhost_memmgr_pin(ctx->hwctx.memmgr, buf,
&ctx->hwctx.channel->dev->dev, mem_flag_none);
if (IS_ERR(sgt))
return PTR_ERR(sgt);
ctx->save_offset = offset;
ctx->save_size = words;
ctx->save_buf = buf;
ctx->save_sgt = sgt;
/* Patch restore buffer address into save buffer */
page_addr = nvhost_memmgr_kmap(ctx->save_buf,
reloc->cmdbuf_offset >> PAGE_SHIFT);
if (!page_addr)
return -ENOMEM;
__raw_writel(nvhost_memmgr_dma_addr(ctx->restore_sgt) + offset,
page_addr + (reloc->cmdbuf_offset & ~PAGE_MASK));
nvhost_memmgr_kunmap(ctx->save_buf,
reloc->cmdbuf_offset >> PAGE_SHIFT,
page_addr);
return 0;
}
int user_hwctx_set_restore(struct user_hwctx *ctx,
ulong mem, u32 offset, u32 words)
{
struct mem_handle *buf;
struct sg_table *sgt;
buf = nvhost_memmgr_get(ctx->hwctx.memmgr,
mem, ctx->hwctx.channel->dev);
if (IS_ERR(buf))
return PTR_ERR(buf);
sgt = nvhost_memmgr_pin(ctx->hwctx.memmgr, buf,
&ctx->hwctx.channel->dev->dev, mem_flag_none);
if (IS_ERR(sgt))
return PTR_ERR(sgt);
ctx->restore_offset = offset;
ctx->restore_size = words;
ctx->restore = buf;
ctx->restore_sgt = sgt;
return 0;
}
int user_hwctx_set_restore(struct user_hwctx *ctx,
u32 mem, u32 offset, u32 words)
{
struct mem_handle *buf;
struct sg_table *sgt;
buf = nvhost_memmgr_get(ctx->hwctx.memmgr,
mem, ctx->hwctx.channel->dev);
if (IS_ERR_OR_NULL(buf))
return -ENOMEM;
sgt = nvhost_memmgr_pin(ctx->hwctx.memmgr, buf,
&ctx->hwctx.channel->dev->dev);
if (IS_ERR_OR_NULL(sgt))
return -ENOMEM;
ctx->restore_offset = offset;
ctx->restore_size = words;
ctx->restore = buf;
ctx->restore_sgt = sgt;
return 0;
}
