418 lines
11 KiB
C
418 lines
11 KiB
C
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/*
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* Copyright 2012 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Ben Skeggs
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*/
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#define nv50_instmem(p) container_of((p), struct nv50_instmem, base)
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#include "priv.h"
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#include <core/memory.h>
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#include <subdev/bar.h>
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#include <subdev/fb.h>
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#include <subdev/mmu.h>
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struct nv50_instmem {
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struct nvkm_instmem base;
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u64 addr;
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/* Mappings that can be evicted when BAR2 space has been exhausted. */
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struct list_head lru;
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};
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/******************************************************************************
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* instmem object implementation
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*****************************************************************************/
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#define nv50_instobj(p) container_of((p), struct nv50_instobj, base.memory)
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struct nv50_instobj {
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struct nvkm_instobj base;
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struct nv50_instmem *imem;
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struct nvkm_memory *ram;
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struct nvkm_vma *bar;
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refcount_t maps;
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void *map;
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struct list_head lru;
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};
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static void
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nv50_instobj_wr32_slow(struct nvkm_memory *memory, u64 offset, u32 data)
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{
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struct nv50_instobj *iobj = nv50_instobj(memory);
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struct nv50_instmem *imem = iobj->imem;
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struct nvkm_device *device = imem->base.subdev.device;
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u64 base = (nvkm_memory_addr(iobj->ram) + offset) & 0xffffff00000ULL;
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u64 addr = (nvkm_memory_addr(iobj->ram) + offset) & 0x000000fffffULL;
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unsigned long flags;
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spin_lock_irqsave(&imem->base.lock, flags);
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if (unlikely(imem->addr != base)) {
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nvkm_wr32(device, 0x001700, base >> 16);
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imem->addr = base;
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}
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nvkm_wr32(device, 0x700000 + addr, data);
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spin_unlock_irqrestore(&imem->base.lock, flags);
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}
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static u32
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nv50_instobj_rd32_slow(struct nvkm_memory *memory, u64 offset)
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{
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struct nv50_instobj *iobj = nv50_instobj(memory);
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struct nv50_instmem *imem = iobj->imem;
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struct nvkm_device *device = imem->base.subdev.device;
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u64 base = (nvkm_memory_addr(iobj->ram) + offset) & 0xffffff00000ULL;
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u64 addr = (nvkm_memory_addr(iobj->ram) + offset) & 0x000000fffffULL;
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u32 data;
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unsigned long flags;
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spin_lock_irqsave(&imem->base.lock, flags);
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if (unlikely(imem->addr != base)) {
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nvkm_wr32(device, 0x001700, base >> 16);
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imem->addr = base;
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}
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data = nvkm_rd32(device, 0x700000 + addr);
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spin_unlock_irqrestore(&imem->base.lock, flags);
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return data;
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}
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static const struct nvkm_memory_ptrs
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nv50_instobj_slow = {
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.rd32 = nv50_instobj_rd32_slow,
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.wr32 = nv50_instobj_wr32_slow,
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};
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static void
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nv50_instobj_wr32(struct nvkm_memory *memory, u64 offset, u32 data)
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{
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iowrite32_native(data, nv50_instobj(memory)->map + offset);
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}
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static u32
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nv50_instobj_rd32(struct nvkm_memory *memory, u64 offset)
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{
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return ioread32_native(nv50_instobj(memory)->map + offset);
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}
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static const struct nvkm_memory_ptrs
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nv50_instobj_fast = {
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.rd32 = nv50_instobj_rd32,
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.wr32 = nv50_instobj_wr32,
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};
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static void
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nv50_instobj_kmap(struct nv50_instobj *iobj, struct nvkm_vmm *vmm)
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{
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struct nv50_instmem *imem = iobj->imem;
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struct nv50_instobj *eobj;
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struct nvkm_memory *memory = &iobj->base.memory;
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struct nvkm_subdev *subdev = &imem->base.subdev;
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struct nvkm_device *device = subdev->device;
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struct nvkm_vma *bar = NULL, *ebar;
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u64 size = nvkm_memory_size(memory);
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void *emap;
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int ret;
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/* Attempt to allocate BAR2 address-space and map the object
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* into it. The lock has to be dropped while doing this due
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* to the possibility of recursion for page table allocation.
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*/
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mutex_unlock(&imem->base.mutex);
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while ((ret = nvkm_vmm_get(vmm, 12, size, &bar))) {
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/* Evict unused mappings, and keep retrying until we either
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* succeed,or there's no more objects left on the LRU.
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*/
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mutex_lock(&imem->base.mutex);
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eobj = list_first_entry_or_null(&imem->lru, typeof(*eobj), lru);
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if (eobj) {
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nvkm_debug(subdev, "evict %016llx %016llx @ %016llx\n",
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nvkm_memory_addr(&eobj->base.memory),
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nvkm_memory_size(&eobj->base.memory),
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eobj->bar->addr);
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list_del_init(&eobj->lru);
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ebar = eobj->bar;
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eobj->bar = NULL;
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emap = eobj->map;
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eobj->map = NULL;
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}
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mutex_unlock(&imem->base.mutex);
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if (!eobj)
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break;
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iounmap(emap);
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nvkm_vmm_put(vmm, &ebar);
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}
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if (ret == 0)
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ret = nvkm_memory_map(memory, 0, vmm, bar, NULL, 0);
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mutex_lock(&imem->base.mutex);
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if (ret || iobj->bar) {
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/* We either failed, or another thread beat us. */
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mutex_unlock(&imem->base.mutex);
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nvkm_vmm_put(vmm, &bar);
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mutex_lock(&imem->base.mutex);
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return;
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}
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/* Make the mapping visible to the host. */
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iobj->bar = bar;
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iobj->map = ioremap_wc(device->func->resource_addr(device, 3) +
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(u32)iobj->bar->addr, size);
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if (!iobj->map) {
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nvkm_warn(subdev, "PRAMIN ioremap failed\n");
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nvkm_vmm_put(vmm, &iobj->bar);
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}
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}
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static int
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nv50_instobj_map(struct nvkm_memory *memory, u64 offset, struct nvkm_vmm *vmm,
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struct nvkm_vma *vma, void *argv, u32 argc)
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{
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memory = nv50_instobj(memory)->ram;
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return nvkm_memory_map(memory, offset, vmm, vma, argv, argc);
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}
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static void
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nv50_instobj_release(struct nvkm_memory *memory)
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{
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struct nv50_instobj *iobj = nv50_instobj(memory);
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struct nv50_instmem *imem = iobj->imem;
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struct nvkm_subdev *subdev = &imem->base.subdev;
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wmb();
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nvkm_bar_flush(subdev->device->bar);
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if (refcount_dec_and_mutex_lock(&iobj->maps, &imem->base.mutex)) {
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/* Add the now-unused mapping to the LRU instead of directly
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* unmapping it here, in case we need to map it again later.
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*/
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if (likely(iobj->lru.next) && iobj->map) {
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BUG_ON(!list_empty(&iobj->lru));
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list_add_tail(&iobj->lru, &imem->lru);
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}
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/* Switch back to NULL accessors when last map is gone. */
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iobj->base.memory.ptrs = NULL;
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mutex_unlock(&imem->base.mutex);
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}
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}
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static void __iomem *
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nv50_instobj_acquire(struct nvkm_memory *memory)
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{
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struct nv50_instobj *iobj = nv50_instobj(memory);
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struct nvkm_instmem *imem = &iobj->imem->base;
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struct nvkm_vmm *vmm;
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void __iomem *map = NULL;
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/* Already mapped? */
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if (refcount_inc_not_zero(&iobj->maps))
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return iobj->map;
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/* Take the lock, and re-check that another thread hasn't
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* already mapped the object in the meantime.
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*/
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mutex_lock(&imem->mutex);
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if (refcount_inc_not_zero(&iobj->maps)) {
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mutex_unlock(&imem->mutex);
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return iobj->map;
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}
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/* Attempt to get a direct CPU mapping of the object. */
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if ((vmm = nvkm_bar_bar2_vmm(imem->subdev.device))) {
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if (!iobj->map)
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nv50_instobj_kmap(iobj, vmm);
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map = iobj->map;
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}
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if (!refcount_inc_not_zero(&iobj->maps)) {
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/* Exclude object from eviction while it's being accessed. */
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if (likely(iobj->lru.next))
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list_del_init(&iobj->lru);
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if (map)
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iobj->base.memory.ptrs = &nv50_instobj_fast;
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else
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iobj->base.memory.ptrs = &nv50_instobj_slow;
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refcount_set(&iobj->maps, 1);
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}
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mutex_unlock(&imem->mutex);
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return map;
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}
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static void
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nv50_instobj_boot(struct nvkm_memory *memory, struct nvkm_vmm *vmm)
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{
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struct nv50_instobj *iobj = nv50_instobj(memory);
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struct nvkm_instmem *imem = &iobj->imem->base;
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/* Exclude bootstrapped objects (ie. the page tables for the
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* instmem BAR itself) from eviction.
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*/
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mutex_lock(&imem->mutex);
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if (likely(iobj->lru.next)) {
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list_del_init(&iobj->lru);
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iobj->lru.next = NULL;
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}
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nv50_instobj_kmap(iobj, vmm);
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nvkm_instmem_boot(imem);
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mutex_unlock(&imem->mutex);
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}
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static u64
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nv50_instobj_size(struct nvkm_memory *memory)
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{
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return nvkm_memory_size(nv50_instobj(memory)->ram);
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}
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static u64
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nv50_instobj_addr(struct nvkm_memory *memory)
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{
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return nvkm_memory_addr(nv50_instobj(memory)->ram);
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}
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static u64
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nv50_instobj_bar2(struct nvkm_memory *memory)
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{
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struct nv50_instobj *iobj = nv50_instobj(memory);
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u64 addr = ~0ULL;
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if (nv50_instobj_acquire(&iobj->base.memory)) {
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iobj->lru.next = NULL; /* Exclude from eviction. */
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addr = iobj->bar->addr;
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}
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nv50_instobj_release(&iobj->base.memory);
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return addr;
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}
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static enum nvkm_memory_target
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nv50_instobj_target(struct nvkm_memory *memory)
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{
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return nvkm_memory_target(nv50_instobj(memory)->ram);
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}
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static void *
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nv50_instobj_dtor(struct nvkm_memory *memory)
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{
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struct nv50_instobj *iobj = nv50_instobj(memory);
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struct nvkm_instmem *imem = &iobj->imem->base;
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struct nvkm_vma *bar;
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void *map;
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mutex_lock(&imem->mutex);
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if (likely(iobj->lru.next))
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list_del(&iobj->lru);
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map = iobj->map;
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bar = iobj->bar;
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mutex_unlock(&imem->mutex);
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if (map) {
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struct nvkm_vmm *vmm = nvkm_bar_bar2_vmm(imem->subdev.device);
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iounmap(map);
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if (likely(vmm)) /* Can be NULL during BAR destructor. */
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nvkm_vmm_put(vmm, &bar);
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}
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nvkm_memory_unref(&iobj->ram);
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nvkm_instobj_dtor(imem, &iobj->base);
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return iobj;
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}
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static const struct nvkm_memory_func
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nv50_instobj_func = {
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.dtor = nv50_instobj_dtor,
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.target = nv50_instobj_target,
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.bar2 = nv50_instobj_bar2,
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.addr = nv50_instobj_addr,
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.size = nv50_instobj_size,
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.boot = nv50_instobj_boot,
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.acquire = nv50_instobj_acquire,
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.release = nv50_instobj_release,
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.map = nv50_instobj_map,
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};
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static int
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nv50_instobj_wrap(struct nvkm_instmem *base,
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struct nvkm_memory *memory, struct nvkm_memory **pmemory)
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{
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struct nv50_instmem *imem = nv50_instmem(base);
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struct nv50_instobj *iobj;
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|
if (!(iobj = kzalloc(sizeof(*iobj), GFP_KERNEL)))
|
||
|
|
return -ENOMEM;
|
||
|
|
*pmemory = &iobj->base.memory;
|
||
|
|
|
||
|
|
nvkm_instobj_ctor(&nv50_instobj_func, &imem->base, &iobj->base);
|
||
|
|
iobj->imem = imem;
|
||
|
|
refcount_set(&iobj->maps, 0);
|
||
|
|
INIT_LIST_HEAD(&iobj->lru);
|
||
|
|
|
||
|
|
iobj->ram = nvkm_memory_ref(memory);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
nv50_instobj_new(struct nvkm_instmem *imem, u32 size, u32 align, bool zero,
|
||
|
|
struct nvkm_memory **pmemory)
|
||
|
|
{
|
||
|
|
u8 page = max(order_base_2(align), 12);
|
||
|
|
struct nvkm_memory *ram;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
ret = nvkm_ram_get(imem->subdev.device, 0, 1, page, size, true, true, &ram);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
ret = nv50_instobj_wrap(imem, ram, pmemory);
|
||
|
|
nvkm_memory_unref(&ram);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/******************************************************************************
|
||
|
|
* instmem subdev implementation
|
||
|
|
*****************************************************************************/
|
||
|
|
|
||
|
|
static void
|
||
|
|
nv50_instmem_fini(struct nvkm_instmem *base)
|
||
|
|
{
|
||
|
|
nv50_instmem(base)->addr = ~0ULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct nvkm_instmem_func
|
||
|
|
nv50_instmem = {
|
||
|
|
.fini = nv50_instmem_fini,
|
||
|
|
.memory_new = nv50_instobj_new,
|
||
|
|
.memory_wrap = nv50_instobj_wrap,
|
||
|
|
.zero = false,
|
||
|
|
};
|
||
|
|
|
||
|
|
int
|
||
|
|
nv50_instmem_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
|
||
|
|
struct nvkm_instmem **pimem)
|
||
|
|
{
|
||
|
|
struct nv50_instmem *imem;
|
||
|
|
|
||
|
|
if (!(imem = kzalloc(sizeof(*imem), GFP_KERNEL)))
|
||
|
|
return -ENOMEM;
|
||
|
|
nvkm_instmem_ctor(&nv50_instmem, device, type, inst, &imem->base);
|
||
|
|
INIT_LIST_HEAD(&imem->lru);
|
||
|
|
*pimem = &imem->base;
|
||
|
|
return 0;
|
||
|
|
}
|