Re: [PATCH 03/11] drm/amdgpu: convert amdgpu_vm_it to half closed intervals

Koenig, Christian
2019-10-04T06:55:11Z

Am 03.10.19 um 22:18 schrieb Davidlohr Bueso:
> The amdgpu_vm interval tree really wants [a, b) intervals,

NAK, we explicitly do need an [a, b[ interval here.

Regards,
Christian.

> not fully closed ones. As such convert it to use the new
> interval_tree_gen.h, and also rename the 'last' endpoint
> in the node to 'end', which is both a more suitable name
> for the half closed interval and also reduces the chances
> of missing a conversion when doing insertion or lookup.
>
> Cc: Jerome Glisse <jglisse@redhat.com>
> Cc: Alex Deucher <alexander.deucher@amd.com>
> Cc: "Christian König" <christian.koenig@amd.com>
> Cc: Daniel Vetter <daniel@ffwll.ch>
> Cc: amd-gfx@lists.freedesktop.org
> Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 2 +-
> drivers/gpu/drm/amd/amdgpu/amdgpu_object.h | 2 +-
> drivers/gpu/drm/amd/amdgpu/amdgpu_trace.h | 18 ++++++------
> drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c | 2 +-
> drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c | 3 +-
> drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 46 +++++++++++++++---------------
> 6 files changed, 36 insertions(+), 37 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> index 49b767b7238f..290bfe820890 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> @@ -756,7 +756,7 @@ static int amdgpu_cs_vm_handling(struct amdgpu_cs_parser *p)
> }
>
> if ((va_start + chunk_ib->ib_bytes) >
> - (m->last + 1) * AMDGPU_GPU_PAGE_SIZE) {
> + m->end * AMDGPU_GPU_PAGE_SIZE) {
> DRM_ERROR("IB va_start+ib_bytes is invalid\n");
> return -EINVAL;
> }
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
> index 7e99f6c58c48..60b73bc4d11a 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
> @@ -51,7 +51,7 @@ struct amdgpu_bo_va_mapping {
> struct list_head list;
> struct rb_node rb;
> uint64_t start;
> - uint64_t last;
> + uint64_t end;
> uint64_t __subtree_last;
> uint64_t offset;
> uint64_t flags;
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_trace.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_trace.h
> index 8227ebd0f511..c5b0e88d019c 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_trace.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_trace.h
> @@ -247,7 +247,7 @@ TRACE_EVENT(amdgpu_vm_bo_map,
> TP_STRUCT__entry(
> __field(struct amdgpu_bo *, bo)
> __field(long, start)
> - __field(long, last)
> + __field(long, end)
> __field(u64, offset)
> __field(u64, flags)
> ),
> @@ -255,12 +255,12 @@ TRACE_EVENT(amdgpu_vm_bo_map,
> TP_fast_assign(
> __entry->bo = bo_va ? bo_va->base.bo : NULL;
> __entry->start = mapping->start;
> - __entry->last = mapping->last;
> + __entry->end = mapping->end;
> __entry->offset = mapping->offset;
> __entry->flags = mapping->flags;
> ),
> - TP_printk("bo=%p, start=%lx, last=%lx, offset=%010llx, flags=%llx",
> - __entry->bo, __entry->start, __entry->last,
> + TP_printk("bo=%p, start=%lx, end=%lx, offset=%010llx, flags=%llx",
> + __entry->bo, __entry->start, __entry->end,
> __entry->offset, __entry->flags)
> );
>
> @@ -271,7 +271,7 @@ TRACE_EVENT(amdgpu_vm_bo_unmap,
> TP_STRUCT__entry(
> __field(struct amdgpu_bo *, bo)
> __field(long, start)
> - __field(long, last)
> + __field(long, end)
> __field(u64, offset)
> __field(u64, flags)
> ),
> @@ -279,12 +279,12 @@ TRACE_EVENT(amdgpu_vm_bo_unmap,
> TP_fast_assign(
> __entry->bo = bo_va ? bo_va->base.bo : NULL;
> __entry->start = mapping->start;
> - __entry->last = mapping->last;
> + __entry->end = mapping->end;
> __entry->offset = mapping->offset;
> __entry->flags = mapping->flags;
> ),
> - TP_printk("bo=%p, start=%lx, last=%lx, offset=%010llx, flags=%llx",
> - __entry->bo, __entry->start, __entry->last,
> + TP_printk("bo=%p, start=%lx, end=%lx, offset=%010llx, flags=%llx",
> + __entry->bo, __entry->start, __entry->end,
> __entry->offset, __entry->flags)
> );
>
> @@ -299,7 +299,7 @@ DECLARE_EVENT_CLASS(amdgpu_vm_mapping,
>
> TP_fast_assign(
> __entry->soffset = mapping->start;
> - __entry->eoffset = mapping->last + 1;
> + __entry->eoffset = mapping->end;
> __entry->flags = mapping->flags;
> ),
> TP_printk("soffs=%010llx, eoffs=%010llx, flags=%llx",
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
> index b2c364b8695f..8094dd0b0332 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
> @@ -819,7 +819,7 @@ static int amdgpu_uvd_cs_pass2(struct amdgpu_uvd_cs_ctx *ctx)
>
> start = amdgpu_bo_gpu_offset(bo);
>
> - end = (mapping->last + 1 - mapping->start);
> + end = mapping->end - mapping->start;
> end = end * AMDGPU_GPU_PAGE_SIZE + start;
>
> addr -= mapping->start * AMDGPU_GPU_PAGE_SIZE;
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
> index b70b3c45bb29..d6511bf446df 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
> @@ -642,8 +642,7 @@ static int amdgpu_vce_cs_reloc(struct amdgpu_cs_parser *p, uint32_t ib_idx,
> return r;
> }
>
> - if ((addr + (uint64_t)size) >
> - (mapping->last + 1) * AMDGPU_GPU_PAGE_SIZE) {
> + if ((addr + (uint64_t)size) > mapping->end * AMDGPU_GPU_PAGE_SIZE) {
> DRM_ERROR("BO to small for addr 0x%010Lx %d %d\n",
> addr, lo, hi);
> return -EINVAL;
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> index a2c797e34a29..2f618017617e 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> @@ -26,7 +26,7 @@
> * Jerome Glisse
> */
> #include <linux/dma-fence-array.h>
> -#include <linux/interval_tree_generic.h>
> +#include <linux/interval_tree_gen.h>
> #include <linux/idr.h>
>
> #include <drm/amdgpu_drm.h>
> @@ -58,13 +58,13 @@
> */
>
> #define START(node) ((node)->start)
> -#define LAST(node) ((node)->last)
> +#define END(node) ((node)->end)
>
> INTERVAL_TREE_DEFINE(struct amdgpu_bo_va_mapping, rb, uint64_t, __subtree_last,
> - START, LAST, static, amdgpu_vm_it)
> + START, END, static, amdgpu_vm_it)
>
> #undef START
> -#undef LAST
> +#undef END
>
> /**
> * struct amdgpu_prt_cb - Helper to disable partial resident texture feature from a fence callback
> @@ -1616,7 +1616,7 @@ static int amdgpu_vm_bo_split_mapping(struct amdgpu_device *adev,
> do {
> dma_addr_t *dma_addr = NULL;
> uint64_t max_entries;
> - uint64_t addr, last;
> + uint64_t addr, end;
>
> if (nodes) {
> addr = nodes->start << PAGE_SHIFT;
> @@ -1654,21 +1654,21 @@ static int amdgpu_vm_bo_split_mapping(struct amdgpu_device *adev,
> addr += pfn << PAGE_SHIFT;
> }
>
> - last = min((uint64_t)mapping->last, start + max_entries - 1);
> + end = min((uint64_t)mapping->end, start + max_entries);
> r = amdgpu_vm_bo_update_mapping(adev, vm, false, exclusive,
> - start, last, flags, addr,
> + start, end, flags, addr,
> dma_addr, fence);
> if (r)
> return r;
>
> - pfn += (last - start + 1) / AMDGPU_GPU_PAGES_IN_CPU_PAGE;
> + pfn += (end - start) / AMDGPU_GPU_PAGES_IN_CPU_PAGE;
> if (nodes && nodes->size == pfn) {
> pfn = 0;
> ++nodes;
> }
> - start = last + 1;
> + start = end;
>
> - } while (unlikely(start != mapping->last + 1));
> + } while (unlikely(start != mapping->end));
>
> return 0;
> }
> @@ -1946,7 +1946,7 @@ int amdgpu_vm_clear_freed(struct amdgpu_device *adev,
> init_pte_value = AMDGPU_PTE_DEFAULT_ATC;
>
> r = amdgpu_vm_bo_update_mapping(adev, vm, false, NULL,
> - mapping->start, mapping->last,
> + mapping->start, mapping->end,
> init_pte_value, 0, NULL, &f);
> amdgpu_vm_free_mapping(adev, vm, mapping, f);
> if (r) {
> @@ -2129,7 +2129,7 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
> return -EINVAL;
>
> /* make sure object fit at this offset */
> - eaddr = saddr + size - 1;
> + eaddr = saddr + size;
> if (saddr >= eaddr ||
> (bo && offset + size > amdgpu_bo_size(bo)))
> return -EINVAL;
> @@ -2142,7 +2142,7 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
> /* bo and tmp overlap, invalid addr */
> dev_err(adev->dev, "bo %p va 0x%010Lx-0x%010Lx conflict with "
> "0x%010Lx-0x%010Lx\n", bo, saddr, eaddr,
> - tmp->start, tmp->last + 1);
> + tmp->start, tmp->end);
> return -EINVAL;
> }
>
> @@ -2151,7 +2151,7 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
> return -ENOMEM;
>
> mapping->start = saddr;
> - mapping->last = eaddr;
> + mapping->end = eaddr;
> mapping->offset = offset;
> mapping->flags = flags;
>
> @@ -2194,7 +2194,7 @@ int amdgpu_vm_bo_replace_map(struct amdgpu_device *adev,
> return -EINVAL;
>
> /* make sure object fit at this offset */
> - eaddr = saddr + size - 1;
> + eaddr = saddr + size;
> if (saddr >= eaddr ||
> (bo && offset + size > amdgpu_bo_size(bo)))
> return -EINVAL;
> @@ -2214,7 +2214,7 @@ int amdgpu_vm_bo_replace_map(struct amdgpu_device *adev,
> eaddr /= AMDGPU_GPU_PAGE_SIZE;
>
> mapping->start = saddr;
> - mapping->last = eaddr;
> + mapping->end = eaddr;
> mapping->offset = offset;
> mapping->flags = flags;
>
> @@ -2299,7 +2299,7 @@ int amdgpu_vm_bo_clear_mappings(struct amdgpu_device *adev,
> LIST_HEAD(removed);
> uint64_t eaddr;
>
> - eaddr = saddr + size - 1;
> + eaddr = saddr + size;
> saddr /= AMDGPU_GPU_PAGE_SIZE;
> eaddr /= AMDGPU_GPU_PAGE_SIZE;
>
> @@ -2322,7 +2322,7 @@ int amdgpu_vm_bo_clear_mappings(struct amdgpu_device *adev,
> /* Remember mapping split at the start */
> if (tmp->start < saddr) {
> before->start = tmp->start;
> - before->last = saddr - 1;
> + before->end = saddr;
> before->offset = tmp->offset;
> before->flags = tmp->flags;
> before->bo_va = tmp->bo_va;
> @@ -2330,9 +2330,9 @@ int amdgpu_vm_bo_clear_mappings(struct amdgpu_device *adev,
> }
>
> /* Remember mapping split at the end */
> - if (tmp->last > eaddr) {
> - after->start = eaddr + 1;
> - after->last = tmp->last;
> + if (tmp->end > eaddr) {
> + after->start = eaddr;
> + after->end = tmp->end;
> after->offset = tmp->offset;
> after->offset += after->start - tmp->start;
> after->flags = tmp->flags;
> @@ -2353,8 +2353,8 @@ int amdgpu_vm_bo_clear_mappings(struct amdgpu_device *adev,
>
> if (tmp->start < saddr)
> tmp->start = saddr;
> - if (tmp->last > eaddr)
> - tmp->last = eaddr;
> + if (tmp->end > eaddr)
> + tmp->end = eaddr;
>
> tmp->bo_va = NULL;
> list_add(&tmp->list, &vm->freed);