From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c | 573 +++++++++++++++++++++++++++++++ 1 file changed, 573 insertions(+) create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c new file mode 100644 index 000000000..296b2d597 --- /dev/null +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c @@ -0,0 +1,573 @@ +/* + * Copyright 2008 Advanced Micro Devices, Inc. + * Copyright 2008 Red Hat Inc. + * Copyright 2009 Jerome Glisse. + * + * 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. + * + * Authors: Dave Airlie + * Alex Deucher + * Jerome Glisse + * Christian König + */ +#include +#include +#include +#include + +#include +#include "amdgpu.h" +#include "atom.h" + +/* + * Rings + * Most engines on the GPU are fed via ring buffers. Ring + * buffers are areas of GPU accessible memory that the host + * writes commands into and the GPU reads commands out of. + * There is a rptr (read pointer) that determines where the + * GPU is currently reading, and a wptr (write pointer) + * which determines where the host has written. When the + * pointers are equal, the ring is idle. When the host + * writes commands to the ring buffer, it increments the + * wptr. The GPU then starts fetching commands and executes + * them until the pointers are equal again. + */ + +/** + * amdgpu_ring_alloc - allocate space on the ring buffer + * + * @ring: amdgpu_ring structure holding ring information + * @ndw: number of dwords to allocate in the ring buffer + * + * Allocate @ndw dwords in the ring buffer (all asics). + * Returns 0 on success, error on failure. + */ +int amdgpu_ring_alloc(struct amdgpu_ring *ring, unsigned ndw) +{ + /* Align requested size with padding so unlock_commit can + * pad safely */ + ndw = (ndw + ring->funcs->align_mask) & ~ring->funcs->align_mask; + + /* Make sure we aren't trying to allocate more space + * than the maximum for one submission + */ + if (WARN_ON_ONCE(ndw > ring->max_dw)) + return -ENOMEM; + + ring->count_dw = ndw; + ring->wptr_old = ring->wptr; + + if (ring->funcs->begin_use) + ring->funcs->begin_use(ring); + + return 0; +} + +/** amdgpu_ring_insert_nop - insert NOP packets + * + * @ring: amdgpu_ring structure holding ring information + * @count: the number of NOP packets to insert + * + * This is the generic insert_nop function for rings except SDMA + */ +void amdgpu_ring_insert_nop(struct amdgpu_ring *ring, uint32_t count) +{ + int i; + + for (i = 0; i < count; i++) + amdgpu_ring_write(ring, ring->funcs->nop); +} + +/** + * amdgpu_ring_generic_pad_ib - pad IB with NOP packets + * + * @ring: amdgpu_ring structure holding ring information + * @ib: IB to add NOP packets to + * + * This is the generic pad_ib function for rings except SDMA + */ +void amdgpu_ring_generic_pad_ib(struct amdgpu_ring *ring, struct amdgpu_ib *ib) +{ + while (ib->length_dw & ring->funcs->align_mask) + ib->ptr[ib->length_dw++] = ring->funcs->nop; +} + +/** + * amdgpu_ring_commit - tell the GPU to execute the new + * commands on the ring buffer + * + * @ring: amdgpu_ring structure holding ring information + * + * Update the wptr (write pointer) to tell the GPU to + * execute new commands on the ring buffer (all asics). + */ +void amdgpu_ring_commit(struct amdgpu_ring *ring) +{ + uint32_t count; + + /* We pad to match fetch size */ + count = ring->funcs->align_mask + 1 - + (ring->wptr & ring->funcs->align_mask); + count %= ring->funcs->align_mask + 1; + ring->funcs->insert_nop(ring, count); + + mb(); + amdgpu_ring_set_wptr(ring); + + if (ring->funcs->end_use) + ring->funcs->end_use(ring); +} + +/** + * amdgpu_ring_undo - reset the wptr + * + * @ring: amdgpu_ring structure holding ring information + * + * Reset the driver's copy of the wptr (all asics). + */ +void amdgpu_ring_undo(struct amdgpu_ring *ring) +{ + ring->wptr = ring->wptr_old; + + if (ring->funcs->end_use) + ring->funcs->end_use(ring); +} + +#define amdgpu_ring_get_gpu_addr(ring, offset) \ + (ring->is_mes_queue ? \ + (ring->mes_ctx->meta_data_gpu_addr + offset) : \ + (ring->adev->wb.gpu_addr + offset * 4)) + +#define amdgpu_ring_get_cpu_addr(ring, offset) \ + (ring->is_mes_queue ? \ + (void *)((uint8_t *)(ring->mes_ctx->meta_data_ptr) + offset) : \ + (&ring->adev->wb.wb[offset])) + +/** + * amdgpu_ring_init - init driver ring struct. + * + * @adev: amdgpu_device pointer + * @ring: amdgpu_ring structure holding ring information + * @max_dw: maximum number of dw for ring alloc + * @irq_src: interrupt source to use for this ring + * @irq_type: interrupt type to use for this ring + * @hw_prio: ring priority (NORMAL/HIGH) + * @sched_score: optional score atomic shared with other schedulers + * + * Initialize the driver information for the selected ring (all asics). + * Returns 0 on success, error on failure. + */ +int amdgpu_ring_init(struct amdgpu_device *adev, struct amdgpu_ring *ring, + unsigned int max_dw, struct amdgpu_irq_src *irq_src, + unsigned int irq_type, unsigned int hw_prio, + atomic_t *sched_score) +{ + int r; + int sched_hw_submission = amdgpu_sched_hw_submission; + u32 *num_sched; + u32 hw_ip; + + /* Set the hw submission limit higher for KIQ because + * it's used for a number of gfx/compute tasks by both + * KFD and KGD which may have outstanding fences and + * it doesn't really use the gpu scheduler anyway; + * KIQ tasks get submitted directly to the ring. + */ + if (ring->funcs->type == AMDGPU_RING_TYPE_KIQ) + sched_hw_submission = max(sched_hw_submission, 256); + else if (ring == &adev->sdma.instance[0].page) + sched_hw_submission = 256; + + if (ring->adev == NULL) { + if (adev->num_rings >= AMDGPU_MAX_RINGS) + return -EINVAL; + + ring->adev = adev; + ring->num_hw_submission = sched_hw_submission; + ring->sched_score = sched_score; + ring->vmid_wait = dma_fence_get_stub(); + + if (!ring->is_mes_queue) { + ring->idx = adev->num_rings++; + adev->rings[ring->idx] = ring; + } + + r = amdgpu_fence_driver_init_ring(ring); + if (r) + return r; + } + + if (ring->is_mes_queue) { + ring->rptr_offs = amdgpu_mes_ctx_get_offs(ring, + AMDGPU_MES_CTX_RPTR_OFFS); + ring->wptr_offs = amdgpu_mes_ctx_get_offs(ring, + AMDGPU_MES_CTX_WPTR_OFFS); + ring->fence_offs = amdgpu_mes_ctx_get_offs(ring, + AMDGPU_MES_CTX_FENCE_OFFS); + ring->trail_fence_offs = amdgpu_mes_ctx_get_offs(ring, + AMDGPU_MES_CTX_TRAIL_FENCE_OFFS); + ring->cond_exe_offs = amdgpu_mes_ctx_get_offs(ring, + AMDGPU_MES_CTX_COND_EXE_OFFS); + } else { + r = amdgpu_device_wb_get(adev, &ring->rptr_offs); + if (r) { + dev_err(adev->dev, "(%d) ring rptr_offs wb alloc failed\n", r); + return r; + } + + r = amdgpu_device_wb_get(adev, &ring->wptr_offs); + if (r) { + dev_err(adev->dev, "(%d) ring wptr_offs wb alloc failed\n", r); + return r; + } + + r = amdgpu_device_wb_get(adev, &ring->fence_offs); + if (r) { + dev_err(adev->dev, "(%d) ring fence_offs wb alloc failed\n", r); + return r; + } + + r = amdgpu_device_wb_get(adev, &ring->trail_fence_offs); + if (r) { + dev_err(adev->dev, "(%d) ring trail_fence_offs wb alloc failed\n", r); + return r; + } + + r = amdgpu_device_wb_get(adev, &ring->cond_exe_offs); + if (r) { + dev_err(adev->dev, "(%d) ring cond_exec_polling wb alloc failed\n", r); + return r; + } + } + + ring->fence_gpu_addr = + amdgpu_ring_get_gpu_addr(ring, ring->fence_offs); + ring->fence_cpu_addr = + amdgpu_ring_get_cpu_addr(ring, ring->fence_offs); + + ring->rptr_gpu_addr = + amdgpu_ring_get_gpu_addr(ring, ring->rptr_offs); + ring->rptr_cpu_addr = + amdgpu_ring_get_cpu_addr(ring, ring->rptr_offs); + + ring->wptr_gpu_addr = + amdgpu_ring_get_gpu_addr(ring, ring->wptr_offs); + ring->wptr_cpu_addr = + amdgpu_ring_get_cpu_addr(ring, ring->wptr_offs); + + ring->trail_fence_gpu_addr = + amdgpu_ring_get_gpu_addr(ring, ring->trail_fence_offs); + ring->trail_fence_cpu_addr = + amdgpu_ring_get_cpu_addr(ring, ring->trail_fence_offs); + + ring->cond_exe_gpu_addr = + amdgpu_ring_get_gpu_addr(ring, ring->cond_exe_offs); + ring->cond_exe_cpu_addr = + amdgpu_ring_get_cpu_addr(ring, ring->cond_exe_offs); + + /* always set cond_exec_polling to CONTINUE */ + *ring->cond_exe_cpu_addr = 1; + + r = amdgpu_fence_driver_start_ring(ring, irq_src, irq_type); + if (r) { + dev_err(adev->dev, "failed initializing fences (%d).\n", r); + return r; + } + + ring->ring_size = roundup_pow_of_two(max_dw * 4 * sched_hw_submission); + + ring->buf_mask = (ring->ring_size / 4) - 1; + ring->ptr_mask = ring->funcs->support_64bit_ptrs ? + 0xffffffffffffffff : ring->buf_mask; + + /* Allocate ring buffer */ + if (ring->is_mes_queue) { + int offset = 0; + + BUG_ON(ring->ring_size > PAGE_SIZE*4); + + offset = amdgpu_mes_ctx_get_offs(ring, + AMDGPU_MES_CTX_RING_OFFS); + ring->gpu_addr = amdgpu_mes_ctx_get_offs_gpu_addr(ring, offset); + ring->ring = amdgpu_mes_ctx_get_offs_cpu_addr(ring, offset); + amdgpu_ring_clear_ring(ring); + + } else if (ring->ring_obj == NULL) { + r = amdgpu_bo_create_kernel(adev, ring->ring_size + ring->funcs->extra_dw, PAGE_SIZE, + AMDGPU_GEM_DOMAIN_GTT, + &ring->ring_obj, + &ring->gpu_addr, + (void **)&ring->ring); + if (r) { + dev_err(adev->dev, "(%d) ring create failed\n", r); + return r; + } + amdgpu_ring_clear_ring(ring); + } + + ring->max_dw = max_dw; + ring->hw_prio = hw_prio; + + if (!ring->no_scheduler) { + hw_ip = ring->funcs->type; + num_sched = &adev->gpu_sched[hw_ip][hw_prio].num_scheds; + adev->gpu_sched[hw_ip][hw_prio].sched[(*num_sched)++] = + &ring->sched; + } + + return 0; +} + +/** + * amdgpu_ring_fini - tear down the driver ring struct. + * + * @ring: amdgpu_ring structure holding ring information + * + * Tear down the driver information for the selected ring (all asics). + */ +void amdgpu_ring_fini(struct amdgpu_ring *ring) +{ + + /* Not to finish a ring which is not initialized */ + if (!(ring->adev) || + (!ring->is_mes_queue && !(ring->adev->rings[ring->idx]))) + return; + + ring->sched.ready = false; + + if (!ring->is_mes_queue) { + amdgpu_device_wb_free(ring->adev, ring->rptr_offs); + amdgpu_device_wb_free(ring->adev, ring->wptr_offs); + + amdgpu_device_wb_free(ring->adev, ring->cond_exe_offs); + amdgpu_device_wb_free(ring->adev, ring->fence_offs); + + amdgpu_bo_free_kernel(&ring->ring_obj, + &ring->gpu_addr, + (void **)&ring->ring); + } else { + kfree(ring->fence_drv.fences); + } + + dma_fence_put(ring->vmid_wait); + ring->vmid_wait = NULL; + ring->me = 0; + + if (!ring->is_mes_queue) + ring->adev->rings[ring->idx] = NULL; +} + +/** + * amdgpu_ring_emit_reg_write_reg_wait_helper - ring helper + * + * @ring: ring to write to + * @reg0: register to write + * @reg1: register to wait on + * @ref: reference value to write/wait on + * @mask: mask to wait on + * + * Helper for rings that don't support write and wait in a + * single oneshot packet. + */ +void amdgpu_ring_emit_reg_write_reg_wait_helper(struct amdgpu_ring *ring, + uint32_t reg0, uint32_t reg1, + uint32_t ref, uint32_t mask) +{ + amdgpu_ring_emit_wreg(ring, reg0, ref); + amdgpu_ring_emit_reg_wait(ring, reg1, mask, mask); +} + +/** + * amdgpu_ring_soft_recovery - try to soft recover a ring lockup + * + * @ring: ring to try the recovery on + * @vmid: VMID we try to get going again + * @fence: timedout fence + * + * Tries to get a ring proceeding again when it is stuck. + */ +bool amdgpu_ring_soft_recovery(struct amdgpu_ring *ring, unsigned int vmid, + struct dma_fence *fence) +{ + ktime_t deadline = ktime_add_us(ktime_get(), 10000); + + if (amdgpu_sriov_vf(ring->adev) || !ring->funcs->soft_recovery || !fence) + return false; + + atomic_inc(&ring->adev->gpu_reset_counter); + while (!dma_fence_is_signaled(fence) && + ktime_to_ns(ktime_sub(deadline, ktime_get())) > 0) + ring->funcs->soft_recovery(ring, vmid); + + return dma_fence_is_signaled(fence); +} + +/* + * Debugfs info + */ +#if defined(CONFIG_DEBUG_FS) + +/* Layout of file is 12 bytes consisting of + * - rptr + * - wptr + * - driver's copy of wptr + * + * followed by n-words of ring data + */ +static ssize_t amdgpu_debugfs_ring_read(struct file *f, char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_ring *ring = file_inode(f)->i_private; + int r, i; + uint32_t value, result, early[3]; + + if (*pos & 3 || size & 3) + return -EINVAL; + + result = 0; + + if (*pos < 12) { + early[0] = amdgpu_ring_get_rptr(ring) & ring->buf_mask; + early[1] = amdgpu_ring_get_wptr(ring) & ring->buf_mask; + early[2] = ring->wptr & ring->buf_mask; + for (i = *pos / 4; i < 3 && size; i++) { + r = put_user(early[i], (uint32_t *)buf); + if (r) + return r; + buf += 4; + result += 4; + size -= 4; + *pos += 4; + } + } + + while (size) { + if (*pos >= (ring->ring_size + 12)) + return result; + + value = ring->ring[(*pos - 12)/4]; + r = put_user(value, (uint32_t *)buf); + if (r) + return r; + buf += 4; + result += 4; + size -= 4; + *pos += 4; + } + + return result; +} + +static const struct file_operations amdgpu_debugfs_ring_fops = { + .owner = THIS_MODULE, + .read = amdgpu_debugfs_ring_read, + .llseek = default_llseek +}; + +#endif + +void amdgpu_debugfs_ring_init(struct amdgpu_device *adev, + struct amdgpu_ring *ring) +{ +#if defined(CONFIG_DEBUG_FS) + struct drm_minor *minor = adev_to_drm(adev)->primary; + struct dentry *root = minor->debugfs_root; + char name[32]; + + sprintf(name, "amdgpu_ring_%s", ring->name); + debugfs_create_file_size(name, S_IFREG | S_IRUGO, root, ring, + &amdgpu_debugfs_ring_fops, + ring->ring_size + 12); + +#endif +} + +/** + * amdgpu_ring_test_helper - tests ring and set sched readiness status + * + * @ring: ring to try the recovery on + * + * Tests ring and set sched readiness status + * + * Returns 0 on success, error on failure. + */ +int amdgpu_ring_test_helper(struct amdgpu_ring *ring) +{ + struct amdgpu_device *adev = ring->adev; + int r; + + r = amdgpu_ring_test_ring(ring); + if (r) + DRM_DEV_ERROR(adev->dev, "ring %s test failed (%d)\n", + ring->name, r); + else + DRM_DEV_DEBUG(adev->dev, "ring test on %s succeeded\n", + ring->name); + + ring->sched.ready = !r; + return r; +} + +static void amdgpu_ring_to_mqd_prop(struct amdgpu_ring *ring, + struct amdgpu_mqd_prop *prop) +{ + struct amdgpu_device *adev = ring->adev; + + memset(prop, 0, sizeof(*prop)); + + prop->mqd_gpu_addr = ring->mqd_gpu_addr; + prop->hqd_base_gpu_addr = ring->gpu_addr; + prop->rptr_gpu_addr = ring->rptr_gpu_addr; + prop->wptr_gpu_addr = ring->wptr_gpu_addr; + prop->queue_size = ring->ring_size; + prop->eop_gpu_addr = ring->eop_gpu_addr; + prop->use_doorbell = ring->use_doorbell; + prop->doorbell_index = ring->doorbell_index; + + /* map_queues packet doesn't need activate the queue, + * so only kiq need set this field. + */ + prop->hqd_active = ring->funcs->type == AMDGPU_RING_TYPE_KIQ; + + if ((ring->funcs->type == AMDGPU_RING_TYPE_COMPUTE && + amdgpu_gfx_is_high_priority_compute_queue(adev, ring)) || + (ring->funcs->type == AMDGPU_RING_TYPE_GFX && + amdgpu_gfx_is_high_priority_graphics_queue(adev, ring))) { + prop->hqd_pipe_priority = AMDGPU_GFX_PIPE_PRIO_HIGH; + prop->hqd_queue_priority = AMDGPU_GFX_QUEUE_PRIORITY_MAXIMUM; + } +} + +int amdgpu_ring_init_mqd(struct amdgpu_ring *ring) +{ + struct amdgpu_device *adev = ring->adev; + struct amdgpu_mqd *mqd_mgr; + struct amdgpu_mqd_prop prop; + + amdgpu_ring_to_mqd_prop(ring, &prop); + + ring->wptr = 0; + + if (ring->funcs->type == AMDGPU_RING_TYPE_KIQ) + mqd_mgr = &adev->mqds[AMDGPU_HW_IP_COMPUTE]; + else + mqd_mgr = &adev->mqds[ring->funcs->type]; + + return mqd_mgr->init_mqd(adev, ring->mqd_ptr, &prop); +} -- cgit v1.2.3