--- /dev/null
+// 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"
+
+#include <drm/drm_exec.h>
+
+/**
+ * DOC: amdgpu_seq64
+ *
+ * amdgpu_seq64 allocates a 64bit memory on each request in sequence order.
+ * seq64 driver is required for user queue fence memory allocation, TLB
+ * counters and VM updates. It has maximum count of 32768 64 bit slots.
+ */
+
+/**
+ * amdgpu_seq64_map - Map the seq64 memory to VM
+ *
+ * @adev: amdgpu_device pointer
+ * @vm: vm pointer
+ * @bo_va: bo_va pointer
+ * @seq64_addr: seq64 vaddr start address
+ * @size: seq64 pool size
+ *
+ * Map the seq64 memory to the given VM.
+ *
+ * Returns:
+ * 0 on success or a negative error code on failure
+ */
+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 amdgpu_bo *bo;
+ struct drm_exec exec;
+ int r;
+
+ bo = adev->seq64.sbo;
+ if (!bo)
+ return -EINVAL;
+
+ drm_exec_init(&exec, DRM_EXEC_INTERRUPTIBLE_WAIT);
+ drm_exec_until_all_locked(&exec) {
+ r = amdgpu_vm_lock_pd(vm, &exec, 0);
+ if (likely(!r))
+ r = drm_exec_lock_obj(&exec, &bo->tbo.base);
+ drm_exec_retry_on_contention(&exec);
+ if (unlikely(r))
+ goto error;
+ }
+
+ *bo_va = amdgpu_vm_bo_add(adev, vm, bo);
+ if (!*bo_va) {
+ r = -ENOMEM;
+ goto error;
+ }
+
+ 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);
+ amdgpu_vm_bo_del(adev, *bo_va);
+ goto error;
+ }
+
+ r = amdgpu_vm_bo_update(adev, *bo_va, false);
+ if (r) {
+ DRM_ERROR("failed to do vm_bo_update on userq sem\n");
+ amdgpu_vm_bo_del(adev, *bo_va);
+ goto error;
+ }
+
+error:
+ drm_exec_fini(&exec);
+ return r;
+}
+
+/**
+ * amdgpu_seq64_unmap - Unmap the seq64 memory
+ *
+ * @adev: amdgpu_device pointer
+ * @fpriv: DRM file private
+ *
+ * Unmap the seq64 memory from the given VM.
+ */
+void amdgpu_seq64_unmap(struct amdgpu_device *adev, struct amdgpu_fpriv *fpriv)
+{
+ struct amdgpu_vm *vm;
+ struct amdgpu_bo *bo;
+ struct drm_exec exec;
+ int r;
+
+ if (!fpriv->seq64_va)
+ return;
+
+ bo = adev->seq64.sbo;
+ if (!bo)
+ return;
+
+ vm = &fpriv->vm;
+
+ drm_exec_init(&exec, DRM_EXEC_INTERRUPTIBLE_WAIT);
+ drm_exec_until_all_locked(&exec) {
+ r = amdgpu_vm_lock_pd(vm, &exec, 0);
+ if (likely(!r))
+ r = drm_exec_lock_obj(&exec, &bo->tbo.base);
+ drm_exec_retry_on_contention(&exec);
+ if (unlikely(r))
+ goto error;
+ }
+
+ amdgpu_vm_bo_del(adev, fpriv->seq64_va);
+
+ fpriv->seq64_va = NULL;
+
+error:
+ drm_exec_fini(&exec);
+}
+
+/**
+ * amdgpu_seq64_alloc - Allocate a 64 bit memory
+ *
+ * @adev: amdgpu_device pointer
+ * @gpu_addr: allocated gpu VA start address
+ * @cpu_addr: allocated cpu VA start address
+ *
+ * Alloc a 64 bit memory from seq64 pool.
+ *
+ * Returns:
+ * 0 on success or a negative error code on failure
+ */
+int amdgpu_seq64_alloc(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;
+}
+
+/**
+ * amdgpu_seq64_free - Free the given 64 bit memory
+ *
+ * @adev: amdgpu_device pointer
+ * @gpu_addr: gpu start address to be freed
+ *
+ * Free the given 64 bit memory from seq64 pool.
+ *
+ */
+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);
+}
+
+/**
+ * amdgpu_seq64_fini - Cleanup seq64 driver
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Free the memory space allocated for seq64.
+ *
+ */
+void amdgpu_seq64_fini(struct amdgpu_device *adev)
+{
+ amdgpu_bo_free_kernel(&adev->seq64.sbo,
+ NULL,
+ (void **)&adev->seq64.cpu_base_addr);
+}
+
+/**
+ * amdgpu_seq64_init - Initialize seq64 driver
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Allocate the required memory space for seq64.
+ *
+ * Returns:
+ * 0 on success or a negative error code on failure
+ */
+int amdgpu_seq64_init(struct amdgpu_device *adev)
+{
+ int r;
+
+ 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;
+}
--- /dev/null
+/* 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;
+ DECLARE_BITMAP(used, AMDGPU_MAX_SEQ64_SLOTS);
+};
+
+void amdgpu_seq64_fini(struct amdgpu_device *adev);
+int amdgpu_seq64_init(struct amdgpu_device *adev);
+int amdgpu_seq64_alloc(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);
+void amdgpu_seq64_unmap(struct amdgpu_device *adev, struct amdgpu_fpriv *fpriv);
+
+#endif
+
projects / linux-block.git / commitdiff