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[src/trunk]: src/sys/external/bsd/drm2/dist/drm/nouveau/nvkm/subdev/instmem R...
details: https://anonhg.NetBSD.org/src/rev/9f5488530736
branches: trunk
changeset: 835107:9f5488530736
user: riastradh <riastradh%NetBSD.org@localhost>
date: Mon Aug 27 07:36:37 2018 +0000
description:
Rewrite DMA/IOMMU stuff using bus_dma for gk20a.
diffstat:
sys/external/bsd/drm2/dist/drm/nouveau/nvkm/subdev/instmem/nouveau_nvkm_subdev_instmem_gk20a.c | 195 +++++++++-
1 files changed, 192 insertions(+), 3 deletions(-)
diffs (truncated from 338 to 300 lines):
diff -r 01c50d6afbbe -r 9f5488530736 sys/external/bsd/drm2/dist/drm/nouveau/nvkm/subdev/instmem/nouveau_nvkm_subdev_instmem_gk20a.c
--- a/sys/external/bsd/drm2/dist/drm/nouveau/nvkm/subdev/instmem/nouveau_nvkm_subdev_instmem_gk20a.c Mon Aug 27 07:36:28 2018 +0000
+++ b/sys/external/bsd/drm2/dist/drm/nouveau/nvkm/subdev/instmem/nouveau_nvkm_subdev_instmem_gk20a.c Mon Aug 27 07:36:37 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: nouveau_nvkm_subdev_instmem_gk20a.c,v 1.3 2018/08/27 07:36:28 riastradh Exp $ */
+/* $NetBSD: nouveau_nvkm_subdev_instmem_gk20a.c,v 1.4 2018/08/27 07:36:37 riastradh Exp $ */
/*
* Copyright (c) 2015, NVIDIA CORPORATION. All rights reserved.
@@ -44,7 +44,7 @@
* goes beyond a certain threshold. At the moment this limit is 1MB.
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_instmem_gk20a.c,v 1.3 2018/08/27 07:36:28 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_instmem_gk20a.c,v 1.4 2018/08/27 07:36:37 riastradh Exp $");
#include "priv.h"
@@ -69,6 +69,20 @@
};
#define gk20a_instobj(p) container_of((p), struct gk20a_instobj, memory)
+#ifdef __NetBSD__
+
+struct gk20a_instobj_netbsd {
+ struct gk20a_instobj base;
+
+ bus_dma_segment_t *segs;
+ int nsegs;
+ bus_dmamap_t map;
+};
+#define gk20a_instobj_netbsd(p) \
+ container_of(gk20a_instobj(p), struct gk20a_instobj_netbsd, base)
+
+#else
+
/*
* Used for objects allocated using the DMA API
*/
@@ -96,6 +110,8 @@
#define gk20a_instobj_iommu(p) \
container_of(gk20a_instobj(p), struct gk20a_instobj_iommu, base)
+#endif /* __NetBSD__ */
+
struct gk20a_instmem {
struct nvkm_instmem base;
@@ -107,6 +123,7 @@
unsigned int vaddr_max;
struct list_head vaddr_lru;
+#ifndef __NetBSD__
/* Only used if IOMMU if present */
struct mutex *mm_mutex;
struct nvkm_mm *mm;
@@ -116,6 +133,7 @@
/* Only used by DMA API */
struct dma_attrs attrs;
+#endif
void __iomem * (*cpu_map)(struct nvkm_memory *);
};
@@ -139,6 +157,39 @@
return (u64)gk20a_instobj(memory)->mem.size << 12;
}
+#ifdef __NetBSD__
+
+static void __iomem *
+gk20a_instobj_cpu_map_netbsd(struct nvkm_memory *memory)
+{
+ struct gk20a_instobj_netbsd *node = gk20a_instobj_netbsd(memory);
+ struct nvkm_device *device = node->base.imem->base.subdev.device;
+ bus_dma_tag_t dmat = device->func->dma_tag(device);
+ uint64_t nbytes = nvkm_memory_size(memory);
+ void *kva;
+ int ret;
+
+ /* XXX errno NetBSD->Linux */
+ ret = -bus_dmamem_map(dmat, node->segs, node->nsegs, nbytes, &kva,
+ BUS_DMA_WAITOK);
+ if (ret)
+ return NULL;
+
+ return kva;
+}
+
+static void
+gk20a_instobj_cpu_unmap_netbsd(struct nvkm_memory *memory, void *kva)
+{
+ struct gk20a_instobj_netbsd *node = gk20a_instobj_netbsd(memory);
+ struct nvkm_device *device = node->base.imem->base.subdev.device;
+ bus_dma_tag_t dmat = device->func->dma_tag(device);
+
+ bus_dmamem_unmap(dmat, kva, nvkm_memory_size(memory));
+}
+
+#else
+
static void __iomem *
gk20a_instobj_cpu_map_dma(struct nvkm_memory *memory)
{
@@ -172,6 +223,8 @@
pgprot_writecombine(PAGE_KERNEL));
}
+#endif /* __NetBSD__ */
+
/*
* Must be called while holding gk20a_instmem_lock
*/
@@ -188,7 +241,11 @@
obj = list_first_entry(&imem->vaddr_lru, struct gk20a_instobj,
vaddr_node);
list_del(&obj->vaddr_node);
+#ifdef __NetBSD__
+ gk20a_instobj_cpu_unmap_netbsd(&obj->memory, obj->vaddr);
+#else
vunmap(obj->vaddr);
+#endif
obj->vaddr = NULL;
imem->vaddr_use -= nvkm_memory_size(&obj->memory);
nvkm_debug(&imem->base.subdev, "(GC) vaddr used: %x/%x\n",
@@ -302,7 +359,11 @@
break;
}
}
+#ifdef __NetBSD__
+ gk20a_instobj_cpu_unmap_netbsd(&node->memory, node->vaddr);
+#else
vunmap(node->vaddr);
+#endif
node->vaddr = NULL;
imem->vaddr_use -= nvkm_memory_size(&node->memory);
nvkm_debug(&imem->base.subdev, "vaddr used: %x/%x\n",
@@ -312,6 +373,31 @@
spin_unlock_irqrestore(&imem->lock, flags);
}
+#ifdef __NetBSD__
+
+static void *
+gk20a_instobj_dtor_netbsd(struct nvkm_memory *memory)
+{
+ struct gk20a_instobj_netbsd *node = gk20a_instobj_netbsd(memory);
+ struct gk20a_instmem *imem = node->base.imem;
+ struct nvkm_device *device = imem->base.subdev.device;
+ bus_dma_tag_t dmat = device->func->dma_tag(device);
+
+ gk20a_instobj_dtor(&node->base);
+
+ if (unlikely(!node->map))
+ goto out;
+
+ bus_dmamap_unload(dmat, node->map);
+ bus_dmamap_destroy(dmat, node->map);
+ bus_dmamem_free(dmat, node->segs, nvkm_memory_size(memory));
+
+out:
+ return node;
+}
+
+#else
+
static void *
gk20a_instobj_dtor_dma(struct nvkm_memory *memory)
{
@@ -369,6 +455,25 @@
return node;
}
+#endif /* __NetBSD__ */
+
+#ifdef __NetBSD__
+
+static const struct nvkm_memory_func
+gk20a_instobj_func_netbsd = {
+ .dtor = gk20a_instobj_dtor_netbsd,
+ .target = gk20a_instobj_target,
+ .addr = gk20a_instobj_addr,
+ .size = gk20a_instobj_size,
+ .acquire = gk20a_instobj_acquire,
+ .release = gk20a_instobj_release,
+ .rd32 = gk20a_instobj_rd32,
+ .wr32 = gk20a_instobj_wr32,
+ .map = gk20a_instobj_map,
+};
+
+#else
+
static const struct nvkm_memory_func
gk20a_instobj_func_dma = {
.dtor = gk20a_instobj_dtor_dma,
@@ -395,6 +500,71 @@
.map = gk20a_instobj_map,
};
+#endif
+
+#ifdef __NetBSD__
+
+static int
+gk20a_instobj_ctor_netbsd(struct gk20a_instmem *imem, u32 pages, u32 align,
+ struct gk20a_instobj **_node)
+{
+ struct gk20a_instobj_netbsd *node;
+ struct nvkm_subdev *subdev = &imem->base.subdev;
+ struct nvkm_device *device = subdev->device;
+ bus_dma_tag_t dmat = device->func->dma_tag(device);
+ bus_size_t nbytes = (bus_size_t)pages << PAGE_SHIFT;
+ int ret;
+
+ if (!(node = kzalloc(sizeof(*node), GFP_KERNEL))) {
+ ret = -ENOMEM;
+fail0: return ret;
+ }
+ *_node = &node->base;
+
+ nvkm_memory_ctor(&gk20a_instobj_func_netbsd, &node->base.memory);
+
+ node->segs = kcalloc(pages, sizeof(node->segs[0]), GFP_KERNEL);
+ if (node->segs == NULL) {
+ ret = -ENOMEM;
+ goto fail0;
+ }
+
+ ret = -bus_dmamem_alloc(dmat, nbytes, align, 0, node->segs, pages,
+ &node->nsegs, BUS_DMA_WAITOK);
+ if (ret) {
+ kfree(node->segs);
+ node->segs = NULL;
+fail1: goto fail0;
+ }
+ KASSERT(0 <= node->nsegs);
+ KASSERT(node->nsegs <= pages);
+
+ /*
+ * Must be a contiguous address range in bus space, so maxsegsz
+ * is the full mapping size.
+ */
+ ret = -bus_dmamap_create(dmat, nbytes, node->nsegs, nbytes, 0,
+ BUS_DMA_WAITOK, &node->map);
+ if (ret) {
+fail2: bus_dmamem_free(dmat, node->segs, node->nsegs);
+ goto fail1;
+ }
+
+ ret = -bus_dmamap_load_raw(dmat, node->map, node->segs, node->nsegs,
+ nbytes, BUS_DMA_WAITOK);
+ if (ret) {
+fail3: __unused
+ bus_dmamap_destroy(dmat, node->map);
+ node->map = NULL;
+ goto fail2;
+ }
+
+ /* Success! */
+ return 0;
+}
+
+#else
+
static int
gk20a_instobj_ctor_dma(struct gk20a_instmem *imem, u32 npages, u32 align,
struct gk20a_instobj **_node)
@@ -532,6 +702,8 @@
return ret;
}
+#endif /* __NetBSD__ */
+
static int
gk20a_instobj_new(struct nvkm_instmem *base, u32 size, u32 align, bool zero,
struct nvkm_memory **pmemory)
@@ -539,21 +711,31 @@
struct gk20a_instmem *imem = gk20a_instmem(base);
struct nvkm_subdev *subdev = &imem->base.subdev;
struct gk20a_instobj *node = NULL;
- int ret;
+ int ret = 0;
+#ifdef __NetBSD__
+ nvkm_debug(subdev, "%s (%s): size: %x align: %x\n", __func__,
+ "bus_dma", size, align);
+#else
nvkm_debug(subdev, "%s (%s): size: %x align: %x\n", __func__,
imem->domain ? "IOMMU" : "DMA", size, align);
+#endif
/* Round size and align to page bounds */
size = max(roundup(size, PAGE_SIZE), PAGE_SIZE);
align = max(roundup(align, PAGE_SIZE), PAGE_SIZE);
+#ifdef __NetBSD__
+ ret = gk20a_instobj_ctor_netbsd(imem, size >> PAGE_SHIFT, align,
+ &node);
+#else
if (imem->domain)
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