Developed a new driver which allocates a 64bit memory on
each request in sequence order. At the moment, user queue
fence memory is the main consumer of this seq64 driver.
v2: Worked on review comments from Christian for the following
modifications
- Move driver name from "semaphore" to "seq64"
- Remove unnecessary PT/PD mapping
- Move enable_mes check into init/fini functions.
Signed-off-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/Makefile | 2 +-
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 5 +
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 7 +
drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 13 ++
drivers/gpu/drm/amd/amdgpu/amdgpu_seq64.c | 158 +++++++++++++++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_seq64.h | 48 +++++++
6 files changed, 232 insertions(+), 1 deletion(-)
create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_seq64.c
create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_seq64.h
diff --git a/drivers/gpu/drm/amd/amdgpu/Makefile b/drivers/gpu/drm/amd/amdgpu/Makefile
index 2cc7897de7e6..d39504e65db1 100644
--- a/drivers/gpu/drm/amd/amdgpu/Makefile
+++ b/drivers/gpu/drm/amd/amdgpu/Makefile
@@ -59,7 +59,7 @@ amdgpu-y += amdgpu_device.o amdgpu_doorbell_mgr.o amdgpu_kms.o \
amdgpu_umc.o smu_v11_0_i2c.o amdgpu_fru_eeprom.o amdgpu_rap.o \
amdgpu_fw_attestation.o amdgpu_securedisplay.o \
amdgpu_eeprom.o amdgpu_mca.o amdgpu_psp_ta.o amdgpu_lsdma.o \
- amdgpu_ring_mux.o
+ amdgpu_ring_mux.o amdgpu_seq64.o
amdgpu-$(CONFIG_PROC_FS) += amdgpu_fdinfo.o
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index c5f9af0e74ee..3bc8a2d35bb3 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -109,6 +109,7 @@
#include "amdgpu_fdinfo.h"
#include "amdgpu_mca.h"
#include "amdgpu_ras.h"
+#include "amdgpu_seq64.h"
#define MAX_GPU_INSTANCE 16
@@ -486,6 +487,7 @@ struct amdgpu_fpriv {
struct amdgpu_vm vm;
struct amdgpu_bo_va *prt_va;
struct amdgpu_bo_va *csa_va;
+ struct amdgpu_bo_va *seq64_va;
struct mutex bo_list_lock;
struct idr bo_list_handles;
struct amdgpu_ctx_mgr ctx_mgr;
@@ -950,6 +952,9 @@ struct amdgpu_device {
/* GDS */
struct amdgpu_gds gds;
+ /* for userq and VM fences */
+ struct amdgpu_seq64 seq64;
+
/* KFD */
struct amdgpu_kfd_dev kfd;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 7f8fcac4f18b..828d0dd1455b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2253,6 +2253,12 @@ static int amdgpu_device_ip_init(struct amdgpu_device *adev)
goto init_failed;
}
}
+
+ r = amdgpu_seq64_init(adev);
+ if (r) {
+ DRM_ERROR("allocate seq64 failed %d\n", r);
+ goto init_failed;
+ }
}
}
@@ -2709,6 +2715,7 @@ static int amdgpu_device_ip_fini(struct amdgpu_device *adev)
amdgpu_device_wb_fini(adev);
amdgpu_device_vram_scratch_fini(adev);
amdgpu_ib_pool_fini(adev);
+ amdgpu_seq64_fini(adev);
}
r = adev->ip_blocks[i].version->funcs->sw_fini((void *)adev);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index b16b8155a157..d89f321304df 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -1183,6 +1183,12 @@ int amdgpu_driver_open_kms(struct drm_device *dev, struct drm_file *file_priv)
goto error_vm;
}
+ r = amdgpu_seq64_map(adev, &fpriv->vm, &fpriv->seq64_va,
+ AMDGPU_SEQ64_VADDR_START,
+ AMDGPU_SEQ64_SIZE);
+ if (r)
+ goto error_vm;
+
mutex_init(&fpriv->bo_list_lock);
idr_init_base(&fpriv->bo_list_handles, 1);
@@ -1250,6 +1256,13 @@ void amdgpu_driver_postclose_kms(struct drm_device *dev,
amdgpu_bo_unreserve(adev->virt.csa_obj);
}
+ if (fpriv->seq64_va) {
+ WARN_ON(amdgpu_bo_reserve(adev->seq64.sbo, true));
+ amdgpu_vm_bo_del(adev, fpriv->seq64_va);
+ fpriv->seq64_va = NULL;
+ amdgpu_bo_unreserve(adev->seq64.sbo);
+ }
+
pasid = fpriv->vm.pasid;
pd = amdgpu_bo_ref(fpriv->vm.root.bo);
if (!WARN_ON(amdgpu_bo_reserve(pd, true))) {
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_seq64.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_seq64.c
new file mode 100644
index 000000000000..bf43856cebbc
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_seq64.c
@@ -0,0 +1,158 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright 2023 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#include "amdgpu.h"
+#include "amdgpu_seq64.h"
+
+void amdgpu_seq64_fini(struct amdgpu_device *adev)
+{
+ if (!adev->enable_mes)
+ return;
+
+ amdgpu_bo_free_kernel(&adev->seq64.sbo,
+ NULL,
+ (void **)&adev->seq64.cpu_base_addr);
+}
+
+int amdgpu_seq64_init(struct amdgpu_device *adev)
+{
+ int r;
+
+ if (!adev->enable_mes)
+ return -EINVAL;
+
+ if (adev->seq64.sbo)
+ return 0;
+
+ /*
+ * AMDGPU_MAX_SEQ64_SLOTS * sizeof(u64) * 8 = AMDGPU_MAX_SEQ64_SLOTS
+ * 64bit slots
+ */
+ r = amdgpu_bo_create_kernel(adev, AMDGPU_SEQ64_SIZE,
+ PAGE_SIZE, AMDGPU_GEM_DOMAIN_GTT,
+ &adev->seq64.sbo, NULL,
+ (void **)&adev->seq64.cpu_base_addr);
+ if (r) {
+ dev_warn(adev->dev, "(%d) create seq64 failed\n", r);
+ return r;
+ }
+
+ memset(adev->seq64.cpu_base_addr, 0, AMDGPU_SEQ64_SIZE);
+
+ adev->seq64.num_sem = AMDGPU_MAX_SEQ64_SLOTS;
+ memset(&adev->seq64.used, 0, sizeof(adev->seq64.used));
+
+ return 0;
+}
+
+int amdgpu_seq64_map(struct amdgpu_device *adev, struct amdgpu_vm *vm,
+ struct amdgpu_bo_va **bo_va, u64 seq64_addr,
+ uint32_t size)
+{
+ struct ttm_validate_buffer seq64_tv;
+ struct amdgpu_bo_list_entry pd;
+ struct ww_acquire_ctx ticket;
+ struct list_head list;
+ struct amdgpu_bo *bo;
+ int r;
+
+ bo = adev->seq64.sbo;
+ if (!bo)
+ return -EINVAL;
+
+ INIT_LIST_HEAD(&list);
+ INIT_LIST_HEAD(&seq64_tv.head);
+
+ seq64_tv.bo = &bo->tbo;
+ seq64_tv.num_shared = 1;
+
+ list_add(&seq64_tv.head, &list);
+ amdgpu_vm_get_pd_bo(vm, &list, &pd);
+
+ r = ttm_eu_reserve_buffers(&ticket, &list, true, NULL);
+ if (r)
+ return r;
+
+ *bo_va = amdgpu_vm_bo_add(adev, vm, bo);
+ if (!*bo_va) {
+ r = -ENOMEM;
+ goto error_vm;
+ }
+
+ r = amdgpu_vm_bo_map(adev, *bo_va, seq64_addr, 0, size,
+ AMDGPU_PTE_READABLE | AMDGPU_PTE_WRITEABLE |
+ AMDGPU_PTE_EXECUTABLE);
+ if (r) {
+ DRM_ERROR("failed to do bo_map on userq sem, err=%d\n", r);
+ goto error_map;
+ }
+
+ r = amdgpu_vm_bo_update(adev, *bo_va, false);
+ if (r) {
+ DRM_ERROR("failed to do vm_bo_update on userq sem\n");
+ goto error_map;
+ }
+
+ ttm_eu_backoff_reservation(&ticket, &list);
+
+ return 0;
+
+error_map:
+ amdgpu_vm_bo_del(adev, *bo_va);
+error_vm:
+ ttm_eu_backoff_reservation(&ticket, &list);
+ return r;
+}
+
+int amdgpu_seq64_get(struct amdgpu_device *adev, u64 *gpu_addr,
+ u64 **cpu_addr)
+{
+ unsigned long bit_pos;
+ u32 offset;
+
+ bit_pos = find_first_zero_bit(adev->seq64.used, adev->seq64.num_sem);
+
+ if (bit_pos < adev->seq64.num_sem) {
+ __set_bit(bit_pos, adev->seq64.used);
+ offset = bit_pos << 6; /* convert to qw offset */
+ } else {
+ return -EINVAL;
+ }
+
+ *gpu_addr = offset + AMDGPU_SEQ64_VADDR_START;
+ *cpu_addr = offset + adev->seq64.cpu_base_addr;
+
+ return 0;
+}
+
+void amdgpu_seq64_free(struct amdgpu_device *adev, u64 gpu_addr)
+{
+ u32 offset;
+
+ offset = gpu_addr - AMDGPU_SEQ64_VADDR_START;
+
+ offset >>= 6;
+ if (offset < adev->seq64.num_sem)
+ __clear_bit(offset, adev->seq64.used);
+}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_seq64.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_seq64.h
new file mode 100644
index 000000000000..e9b0afa9c5aa
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_seq64.h
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright 2023 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#ifndef __AMDGPU_SEQ64_H__
+#define __AMDGPU_SEQ64_H__
+
+#define AMDGPU_SEQ64_SIZE (2ULL << 20)
+#define AMDGPU_MAX_SEQ64_SLOTS (AMDGPU_SEQ64_SIZE / (sizeof(u64) * 8))
+#define AMDGPU_SEQ64_VADDR_OFFSET 0x50000
+#define AMDGPU_SEQ64_VADDR_START (AMDGPU_VA_RESERVED_SIZE + AMDGPU_SEQ64_VADDR_OFFSET)
+
+struct amdgpu_seq64 {
+ struct amdgpu_bo *sbo;
+ u32 num_sem;
+ u64 *cpu_base_addr;
+ unsigned long used[DIV_ROUND_UP(AMDGPU_MAX_SEQ64_SLOTS, BITS_PER_LONG)];
+};
+
+void amdgpu_seq64_fini(struct amdgpu_device *adev);
+int amdgpu_seq64_init(struct amdgpu_device *adev);
+int amdgpu_seq64_get(struct amdgpu_device *adev, u64 *gpu_addr, u64 **cpu_addr);
+void amdgpu_seq64_free(struct amdgpu_device *adev, u64 gpu_addr);
+int amdgpu_seq64_map(struct amdgpu_device *adev, struct amdgpu_vm *vm,
+ struct amdgpu_bo_va **bo_va, u64 seq64_addr, uint32_t size);
+
+#endif
+
--
2.25.1
