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From 20620531eab1dd6d8a0f7f6314745121f42e1b5c Mon Sep 17 00:00:00 2001
From: shaoyunl <Shaoyun.Liu@amd.com>
Date: Fri, 7 Sep 2018 12:00:07 -0400
Subject: [PATCH 5714/5725] drm/amdkfd: Only add bi-directional iolink on GPU
with XGMI or largebar
Change-Id: Ibb6a89ed878fffccb9a8bb4032b07a10ee298a99
Signed-off-by: shaoyunl <Shaoyun.Liu@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
---
drivers/gpu/drm/amd/amdkfd/kfd_crat.c | 15 +++++++++------
drivers/gpu/drm/amd/amdkfd/kfd_crat.h | 3 ++-
drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 1 +
3 files changed, 12 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
index 1655e8b..ee753cb 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
@@ -353,8 +353,8 @@ static int kfd_parse_subtype_iolink(struct crat_subtype_iolink *iolink,
id_from = iolink->proximity_domain_from;
id_to = iolink->proximity_domain_to;
- pr_debug("Found IO link entry in CRAT table with id_from=%d\n",
- id_from);
+ pr_debug("Found IO link entry in CRAT table with id_from=%d, id_to %d\n",
+ id_from, id_to);
list_for_each_entry(dev, device_list, list) {
if (id_from == dev->proximity_domain) {
props = kfd_alloc_struct(props);
@@ -391,12 +391,12 @@ static int kfd_parse_subtype_iolink(struct crat_subtype_iolink *iolink,
/* CPU topology is created before GPUs are detected, so CPU->GPU
* links are not built at that time. If a PCIe type is discovered, it
* means a GPU is detected and we are adding GPU->CPU to the topology.
- * At this time, also add the corresponded CPU->GPU link.
+ * At this time, also add the corresponded CPU->GPU link if GPU
+ * is large bar.
* For xGMI, we only added the link with one direction in the crat
* table, add corresponded reversed direction link now.
*/
- if (props && (props->iolink_type == CRAT_IOLINK_TYPE_PCIEXPRESS ||
- props->iolink_type == CRAT_IOLINK_TYPE_XGMI)) {
+ if (props && (iolink->flags & CRAT_IOLINK_FLAGS_BI_DIRECTIONAL)) {
to_dev = kfd_topology_device_by_proximity_domain(id_to);
if (!to_dev)
return -ENODEV;
@@ -1076,6 +1076,8 @@ static int kfd_fill_gpu_direct_io_link_to_cpu(int *avail_size,
sub_type_hdr->type = CRAT_SUBTYPE_IOLINK_AFFINITY;
sub_type_hdr->length = sizeof(struct crat_subtype_iolink);
sub_type_hdr->flags |= CRAT_SUBTYPE_FLAGS_ENABLED;
+ if (kfd_dev_is_large_bar(kdev))
+ sub_type_hdr->flags |= CRAT_IOLINK_FLAGS_BI_DIRECTIONAL;
/* Fill in IOLINK subtype.
* TODO: Fill-in other fields of iolink subtype
@@ -1107,7 +1109,8 @@ static int kfd_fill_gpu_xgmi_link_to_gpu(int *avail_size,
sub_type_hdr->type = CRAT_SUBTYPE_IOLINK_AFFINITY;
sub_type_hdr->length = sizeof(struct crat_subtype_iolink);
- sub_type_hdr->flags |= CRAT_SUBTYPE_FLAGS_ENABLED;
+ sub_type_hdr->flags |= CRAT_SUBTYPE_FLAGS_ENABLED |
+ CRAT_IOLINK_FLAGS_BI_DIRECTIONAL;
sub_type_hdr->io_interface_type = CRAT_IOLINK_TYPE_XGMI;
sub_type_hdr->proximity_domain_from = proximity_domain_from;
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_crat.h b/drivers/gpu/drm/amd/amdkfd/kfd_crat.h
index 1ef8823..cfdd02f 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_crat.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_crat.h
@@ -232,7 +232,8 @@ struct crat_subtype_ccompute {
#define CRAT_IOLINK_FLAGS_NO_ATOMICS_32_BIT (1 << 2)
#define CRAT_IOLINK_FLAGS_NO_ATOMICS_64_BIT (1 << 3)
#define CRAT_IOLINK_FLAGS_NO_PEER_TO_PEER_DMA (1 << 4)
-#define CRAT_IOLINK_FLAGS_RESERVED_MASK 0xffffffe0
+#define CRAT_IOLINK_FLAGS_BI_DIRECTIONAL (1 << 31)
+#define CRAT_IOLINK_FLAGS_RESERVED_MASK 0x7fffffe0
/*
* IO interface types
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
index ca42b58..1f0d558 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
@@ -834,6 +834,7 @@ struct amdkfd_ioctl_desc {
unsigned int cmd_drv;
const char *name;
};
+bool kfd_dev_is_large_bar(struct kfd_dev *dev);
int kfd_process_create_wq(void);
void kfd_process_destroy_wq(void);
--
2.7.4
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