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f0dc99a6f7
Initializes kfd->device_info given either asic_type (enum) if GFX version is less than GFX9, or GC IP version if greater. Also takes in vf and the target compiler gfx version. Uses SDMA version to determine num_sdma_queues_per_engine. Convert device_info to a non-pointer member of kfd, change references accordingly. Change unsupported asic condition to only probe f2g, move device_info initialization post-switch. Signed-off-by: Graham Sider <Graham.Sider@amd.com> Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
276 lines
8.2 KiB
C
276 lines
8.2 KiB
C
/*
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* Copyright 2014 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "kfd_priv.h"
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#include <linux/mm.h>
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#include <linux/mman.h>
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#include <linux/slab.h>
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#include <linux/io.h>
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#include <linux/idr.h>
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/*
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* This extension supports a kernel level doorbells management for the
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* kernel queues using the first doorbell page reserved for the kernel.
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*/
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/*
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* Each device exposes a doorbell aperture, a PCI MMIO aperture that
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* receives 32-bit writes that are passed to queues as wptr values.
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* The doorbells are intended to be written by applications as part
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* of queueing work on user-mode queues.
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* We assign doorbells to applications in PAGE_SIZE-sized and aligned chunks.
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* We map the doorbell address space into user-mode when a process creates
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* its first queue on each device.
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* Although the mapping is done by KFD, it is equivalent to an mmap of
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* the /dev/kfd with the particular device encoded in the mmap offset.
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* There will be other uses for mmap of /dev/kfd, so only a range of
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* offsets (KFD_MMAP_DOORBELL_START-END) is used for doorbells.
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*/
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/* # of doorbell bytes allocated for each process. */
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size_t kfd_doorbell_process_slice(struct kfd_dev *kfd)
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{
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return roundup(kfd->device_info.doorbell_size *
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KFD_MAX_NUM_OF_QUEUES_PER_PROCESS,
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PAGE_SIZE);
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}
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/* Doorbell calculations for device init. */
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int kfd_doorbell_init(struct kfd_dev *kfd)
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{
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size_t doorbell_start_offset;
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size_t doorbell_aperture_size;
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size_t doorbell_process_limit;
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/*
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* We start with calculations in bytes because the input data might
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* only be byte-aligned.
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* Only after we have done the rounding can we assume any alignment.
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*/
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doorbell_start_offset =
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roundup(kfd->shared_resources.doorbell_start_offset,
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kfd_doorbell_process_slice(kfd));
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doorbell_aperture_size =
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rounddown(kfd->shared_resources.doorbell_aperture_size,
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kfd_doorbell_process_slice(kfd));
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if (doorbell_aperture_size > doorbell_start_offset)
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doorbell_process_limit =
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(doorbell_aperture_size - doorbell_start_offset) /
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kfd_doorbell_process_slice(kfd);
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else
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return -ENOSPC;
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if (!kfd->max_doorbell_slices ||
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doorbell_process_limit < kfd->max_doorbell_slices)
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kfd->max_doorbell_slices = doorbell_process_limit;
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kfd->doorbell_base = kfd->shared_resources.doorbell_physical_address +
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doorbell_start_offset;
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kfd->doorbell_base_dw_offset = doorbell_start_offset / sizeof(u32);
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kfd->doorbell_kernel_ptr = ioremap(kfd->doorbell_base,
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kfd_doorbell_process_slice(kfd));
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if (!kfd->doorbell_kernel_ptr)
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return -ENOMEM;
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pr_debug("Doorbell initialization:\n");
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pr_debug("doorbell base == 0x%08lX\n",
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(uintptr_t)kfd->doorbell_base);
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pr_debug("doorbell_base_dw_offset == 0x%08lX\n",
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kfd->doorbell_base_dw_offset);
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pr_debug("doorbell_process_limit == 0x%08lX\n",
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doorbell_process_limit);
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pr_debug("doorbell_kernel_offset == 0x%08lX\n",
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(uintptr_t)kfd->doorbell_base);
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pr_debug("doorbell aperture size == 0x%08lX\n",
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kfd->shared_resources.doorbell_aperture_size);
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pr_debug("doorbell kernel address == %p\n", kfd->doorbell_kernel_ptr);
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return 0;
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}
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void kfd_doorbell_fini(struct kfd_dev *kfd)
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{
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if (kfd->doorbell_kernel_ptr)
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iounmap(kfd->doorbell_kernel_ptr);
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}
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int kfd_doorbell_mmap(struct kfd_dev *dev, struct kfd_process *process,
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struct vm_area_struct *vma)
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{
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phys_addr_t address;
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struct kfd_process_device *pdd;
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/*
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* For simplicitly we only allow mapping of the entire doorbell
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* allocation of a single device & process.
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*/
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if (vma->vm_end - vma->vm_start != kfd_doorbell_process_slice(dev))
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return -EINVAL;
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pdd = kfd_get_process_device_data(dev, process);
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if (!pdd)
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return -EINVAL;
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/* Calculate physical address of doorbell */
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address = kfd_get_process_doorbells(pdd);
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vma->vm_flags |= VM_IO | VM_DONTCOPY | VM_DONTEXPAND | VM_NORESERVE |
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VM_DONTDUMP | VM_PFNMAP;
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vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
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pr_debug("Mapping doorbell page\n"
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" target user address == 0x%08llX\n"
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" physical address == 0x%08llX\n"
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" vm_flags == 0x%04lX\n"
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" size == 0x%04lX\n",
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(unsigned long long) vma->vm_start, address, vma->vm_flags,
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kfd_doorbell_process_slice(dev));
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return io_remap_pfn_range(vma,
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vma->vm_start,
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address >> PAGE_SHIFT,
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kfd_doorbell_process_slice(dev),
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vma->vm_page_prot);
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}
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/* get kernel iomem pointer for a doorbell */
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void __iomem *kfd_get_kernel_doorbell(struct kfd_dev *kfd,
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unsigned int *doorbell_off)
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{
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u32 inx;
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mutex_lock(&kfd->doorbell_mutex);
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inx = find_first_zero_bit(kfd->doorbell_available_index,
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KFD_MAX_NUM_OF_QUEUES_PER_PROCESS);
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__set_bit(inx, kfd->doorbell_available_index);
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mutex_unlock(&kfd->doorbell_mutex);
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if (inx >= KFD_MAX_NUM_OF_QUEUES_PER_PROCESS)
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return NULL;
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inx *= kfd->device_info.doorbell_size / sizeof(u32);
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/*
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* Calculating the kernel doorbell offset using the first
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* doorbell page.
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*/
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*doorbell_off = kfd->doorbell_base_dw_offset + inx;
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pr_debug("Get kernel queue doorbell\n"
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" doorbell offset == 0x%08X\n"
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" doorbell index == 0x%x\n",
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*doorbell_off, inx);
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return kfd->doorbell_kernel_ptr + inx;
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}
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void kfd_release_kernel_doorbell(struct kfd_dev *kfd, u32 __iomem *db_addr)
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{
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unsigned int inx;
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inx = (unsigned int)(db_addr - kfd->doorbell_kernel_ptr)
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* sizeof(u32) / kfd->device_info.doorbell_size;
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mutex_lock(&kfd->doorbell_mutex);
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__clear_bit(inx, kfd->doorbell_available_index);
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mutex_unlock(&kfd->doorbell_mutex);
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}
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void write_kernel_doorbell(void __iomem *db, u32 value)
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{
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if (db) {
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writel(value, db);
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pr_debug("Writing %d to doorbell address %p\n", value, db);
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}
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}
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void write_kernel_doorbell64(void __iomem *db, u64 value)
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{
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if (db) {
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WARN(((unsigned long)db & 7) != 0,
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"Unaligned 64-bit doorbell");
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writeq(value, (u64 __iomem *)db);
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pr_debug("writing %llu to doorbell address %p\n", value, db);
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}
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}
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unsigned int kfd_get_doorbell_dw_offset_in_bar(struct kfd_dev *kfd,
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struct kfd_process_device *pdd,
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unsigned int doorbell_id)
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{
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/*
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* doorbell_base_dw_offset accounts for doorbells taken by KGD.
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* index * kfd_doorbell_process_slice/sizeof(u32) adjusts to
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* the process's doorbells. The offset returned is in dword
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* units regardless of the ASIC-dependent doorbell size.
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*/
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return kfd->doorbell_base_dw_offset +
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pdd->doorbell_index
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* kfd_doorbell_process_slice(kfd) / sizeof(u32) +
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doorbell_id * kfd->device_info.doorbell_size / sizeof(u32);
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}
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uint64_t kfd_get_number_elems(struct kfd_dev *kfd)
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{
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uint64_t num_of_elems = (kfd->shared_resources.doorbell_aperture_size -
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kfd->shared_resources.doorbell_start_offset) /
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kfd_doorbell_process_slice(kfd) + 1;
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return num_of_elems;
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}
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phys_addr_t kfd_get_process_doorbells(struct kfd_process_device *pdd)
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{
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return pdd->dev->doorbell_base +
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pdd->doorbell_index * kfd_doorbell_process_slice(pdd->dev);
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}
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int kfd_alloc_process_doorbells(struct kfd_dev *kfd, unsigned int *doorbell_index)
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{
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int r = ida_simple_get(&kfd->doorbell_ida, 1, kfd->max_doorbell_slices,
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GFP_KERNEL);
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if (r > 0)
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*doorbell_index = r;
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return r;
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}
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void kfd_free_process_doorbells(struct kfd_dev *kfd, unsigned int doorbell_index)
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{
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if (doorbell_index)
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ida_simple_remove(&kfd->doorbell_ida, doorbell_index);
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}
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