1 files changed, 353 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c
new file mode 100644
index 000000000000..935071410724
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c
@@ -0,0 +1,353 @@
+/*
+ * Copyright 2014 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 <linux/types.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/printk.h>
+#include <linux/sched.h>
+#include "kfd_kernel_queue.h"
+#include "kfd_priv.h"
+#include "kfd_device_queue_manager.h"
+#include "kfd_pm4_headers.h"
+#include "kfd_pm4_opcodes.h"
+
+#define PM4_COUNT_ZERO (((1 << 15) - 1) << 16)
+
+static bool initialize(struct kernel_queue *kq, struct kfd_dev *dev,
+                enum kfd_queue_type type, unsigned int queue_size)
+{
+        struct queue_properties prop;
+        int retval;
+        union PM4_MES_TYPE_3_HEADER nop;
+
+        BUG_ON(!kq || !dev);
+        BUG_ON(type != KFD_QUEUE_TYPE_DIQ && type != KFD_QUEUE_TYPE_HIQ);
+
+        pr_debug("kfd: In func %s initializing queue type %d size %d\n",
+                        __func__, KFD_QUEUE_TYPE_HIQ, queue_size);
+
+        nop.opcode = IT_NOP;
+        nop.type = PM4_TYPE_3;
+        nop.u32all |= PM4_COUNT_ZERO;
+
+        kq->dev = dev;
+        kq->nop_packet = nop.u32all;
+        switch (type) {
+        case KFD_QUEUE_TYPE_DIQ:
+        case KFD_QUEUE_TYPE_HIQ:
+                kq->mqd = dev->dqm->get_mqd_manager(dev->dqm,
+                                                KFD_MQD_TYPE_CIK_HIQ);
+                break;
+        default:
+                BUG();
+                break;
+        }
+
+        if (kq->mqd == NULL)
+                return false;
+
+        prop.doorbell_ptr = kfd_get_kernel_doorbell(dev, &prop.doorbell_off);
+
+        if (prop.doorbell_ptr == NULL)
+                goto err_get_kernel_doorbell;
+
+        retval = kfd2kgd->allocate_mem(dev->kgd,
+                                        queue_size,
+                                        PAGE_SIZE,
+                                        KFD_MEMPOOL_SYSTEM_WRITECOMBINE,
+                                        (struct kgd_mem **) &kq->pq);
+
+        if (retval != 0)
+                goto err_pq_allocate_vidmem;
+
+        kq->pq_kernel_addr = kq->pq->cpu_ptr;
+        kq->pq_gpu_addr = kq->pq->gpu_addr;
+
+        retval = kfd2kgd->allocate_mem(dev->kgd,
+                                        sizeof(*kq->rptr_kernel),
+                                        32,
+                                        KFD_MEMPOOL_SYSTEM_WRITECOMBINE,
+                                        (struct kgd_mem **) &kq->rptr_mem);
+
+        if (retval != 0)
+                goto err_rptr_allocate_vidmem;
+
+        kq->rptr_kernel = kq->rptr_mem->cpu_ptr;
+        kq->rptr_gpu_addr = kq->rptr_mem->gpu_addr;
+
+        retval = kfd2kgd->allocate_mem(dev->kgd,
+                                        sizeof(*kq->wptr_kernel),
+                                        32,
+                                        KFD_MEMPOOL_SYSTEM_WRITECOMBINE,
+                                        (struct kgd_mem **) &kq->wptr_mem);
+
+        if (retval != 0)
+                goto err_wptr_allocate_vidmem;
+
+        kq->wptr_kernel = kq->wptr_mem->cpu_ptr;
+        kq->wptr_gpu_addr = kq->wptr_mem->gpu_addr;
+
+        memset(kq->pq_kernel_addr, 0, queue_size);
+        memset(kq->rptr_kernel, 0, sizeof(*kq->rptr_kernel));
+        memset(kq->wptr_kernel, 0, sizeof(*kq->wptr_kernel));
+
+        prop.queue_size = queue_size;
+        prop.is_interop = false;
+        prop.priority = 1;
+        prop.queue_percent = 100;
+        prop.type = type;
+        prop.vmid = 0;
+        prop.queue_address = kq->pq_gpu_addr;
+        prop.read_ptr = (uint32_t *) kq->rptr_gpu_addr;
+        prop.write_ptr = (uint32_t *) kq->wptr_gpu_addr;
+
+        if (init_queue(&kq->queue, prop) != 0)
+                goto err_init_queue;
+
+        kq->queue->device = dev;
+        kq->queue->process = kfd_get_process(current);
+
+        retval = kq->mqd->init_mqd(kq->mqd, &kq->queue->mqd,
+                                        &kq->queue->mqd_mem_obj,
+                                        &kq->queue->gart_mqd_addr,
+                                        &kq->queue->properties);
+        if (retval != 0)
+                goto err_init_mqd;
+
+        /* assign HIQ to HQD */
+        if (type == KFD_QUEUE_TYPE_HIQ) {
+                pr_debug("assigning hiq to hqd\n");
+                kq->queue->pipe = KFD_CIK_HIQ_PIPE;
+                kq->queue->queue = KFD_CIK_HIQ_QUEUE;
+                kq->mqd->load_mqd(kq->mqd, kq->queue->mqd, kq->queue->pipe,
+                                        kq->queue->queue, NULL);
+        } else {
+                /* allocate fence for DIQ */
+
+                retval = kfd2kgd->allocate_mem(dev->kgd,
+                                        sizeof(uint32_t),
+                                        32,
+                                        KFD_MEMPOOL_SYSTEM_WRITECOMBINE,
+                                        (struct kgd_mem **) &kq->fence_mem_obj);
+
+                if (retval != 0)
+                        goto err_alloc_fence;
+
+                kq->fence_kernel_address = kq->fence_mem_obj->cpu_ptr;
+                kq->fence_gpu_addr = kq->fence_mem_obj->gpu_addr;
+        }
+
+        print_queue(kq->queue);
+
+        return true;
+err_alloc_fence:
+err_init_mqd:
+        uninit_queue(kq->queue);
+err_init_queue:
+        kfd2kgd->free_mem(dev->kgd, (struct kgd_mem *) kq->wptr_mem);
+err_wptr_allocate_vidmem:
+        kfd2kgd->free_mem(dev->kgd, (struct kgd_mem *) kq->rptr_mem);
+err_rptr_allocate_vidmem:
+        kfd2kgd->free_mem(dev->kgd, (struct kgd_mem *) kq->pq);
+err_pq_allocate_vidmem:
+        pr_err("kfd: error init pq\n");
+        kfd_release_kernel_doorbell(dev, prop.doorbell_ptr);
+err_get_kernel_doorbell:
+        pr_err("kfd: error init doorbell");
+        return false;
+
+}
+
+static void uninitialize(struct kernel_queue *kq)
+{
+        BUG_ON(!kq);
+
+        if (kq->queue->properties.type == KFD_QUEUE_TYPE_HIQ)
+                kq->mqd->destroy_mqd(kq->mqd,
+                                        NULL,
+                                        false,
+                                        QUEUE_PREEMPT_DEFAULT_TIMEOUT_MS,
+                                        kq->queue->pipe,
+                                        kq->queue->queue);
+
+        kfd2kgd->free_mem(kq->dev->kgd, (struct kgd_mem *) kq->rptr_mem);
+        kfd2kgd->free_mem(kq->dev->kgd, (struct kgd_mem *) kq->wptr_mem);
+        kfd2kgd->free_mem(kq->dev->kgd, (struct kgd_mem *) kq->pq);
+        kfd_release_kernel_doorbell(kq->dev,
+                                        kq->queue->properties.doorbell_ptr);
+        uninit_queue(kq->queue);
+}
+
+static int acquire_packet_buffer(struct kernel_queue *kq,
+                size_t packet_size_in_dwords, unsigned int **buffer_ptr)
+{
+        size_t available_size;
+        size_t queue_size_dwords;
+        uint32_t wptr, rptr;
+        unsigned int *queue_address;
+
+        BUG_ON(!kq || !buffer_ptr);
+
+        rptr = *kq->rptr_kernel;
+        wptr = *kq->wptr_kernel;
+        queue_address = (unsigned int *)kq->pq_kernel_addr;
+        queue_size_dwords = kq->queue->properties.queue_size / sizeof(uint32_t);
+
+        pr_debug("kfd: In func %s\nrptr: %d\nwptr: %d\nqueue_address 0x%p\n",
+                        __func__, rptr, wptr, queue_address);
+
+        available_size = (rptr - 1 - wptr + queue_size_dwords) %
+                                                        queue_size_dwords;
+
+        if (packet_size_in_dwords >= queue_size_dwords ||
+                        packet_size_in_dwords >= available_size) {
+                /*
+                 * make sure calling functions know
+                 * acquire_packet_buffer() failed
+                 */
+                *buffer_ptr = NULL;
+                return -ENOMEM;
+        }
+
+        if (wptr + packet_size_in_dwords >= queue_size_dwords) {
+                while (wptr > 0) {
+                        queue_address[wptr] = kq->nop_packet;
+                        wptr = (wptr + 1) % queue_size_dwords;
+                }
+        }
+
+        *buffer_ptr = &queue_address[wptr];
+        kq->pending_wptr = wptr + packet_size_in_dwords;
+
+        return 0;
+}
+
+static void submit_packet(struct kernel_queue *kq)
+{
+#ifdef DEBUG
+        int i;
+#endif
+
+        BUG_ON(!kq);
+
+#ifdef DEBUG
+        for (i = *kq->wptr_kernel; i < kq->pending_wptr; i++) {
+                pr_debug("0x%2X ", kq->pq_kernel_addr[i]);
+                if (i % 15 == 0)
+                        pr_debug("\n");
+        }
+        pr_debug("\n");
+#endif
+
+        *kq->wptr_kernel = kq->pending_wptr;
+        write_kernel_doorbell(kq->queue->properties.doorbell_ptr,
+                                kq->pending_wptr);
+}
+
+static int sync_with_hw(struct kernel_queue *kq, unsigned long timeout_ms)
+{
+        unsigned long org_timeout_ms;
+
+        BUG_ON(!kq);
+
+        org_timeout_ms = timeout_ms;
+        timeout_ms += jiffies * 1000 / HZ;
+        while (*kq->wptr_kernel != *kq->rptr_kernel) {
+                if (time_after(jiffies * 1000 / HZ, timeout_ms)) {
+                        pr_err("kfd: kernel_queue %s timeout expired %lu\n",
+                                __func__, org_timeout_ms);
+                        pr_err("kfd: wptr: %d rptr: %d\n",
+                                *kq->wptr_kernel, *kq->rptr_kernel);
+                        return -ETIME;
+                }
+                schedule();
+        }
+
+        return 0;
+}
+
+static void rollback_packet(struct kernel_queue *kq)
+{
+        BUG_ON(!kq);
+        kq->pending_wptr = *kq->queue->properties.write_ptr;
+}
+
+struct kernel_queue *kernel_queue_init(struct kfd_dev *dev,
+                                        enum kfd_queue_type type)
+{
+        struct kernel_queue *kq;
+
+        BUG_ON(!dev);
+
+        kq = kzalloc(sizeof(struct kernel_queue), GFP_KERNEL);
+        if (!kq)
+                return NULL;
+
+        kq->initialize = initialize;
+        kq->uninitialize = uninitialize;
+        kq->acquire_packet_buffer = acquire_packet_buffer;
+        kq->submit_packet = submit_packet;
+        kq->sync_with_hw = sync_with_hw;
+        kq->rollback_packet = rollback_packet;
+
+        if (kq->initialize(kq, dev, type, KFD_KERNEL_QUEUE_SIZE) == false) {
+                pr_err("kfd: failed to init kernel queue\n");
+                kfree(kq);
+                return NULL;
+        }
+        return kq;
+}
+
+void kernel_queue_uninit(struct kernel_queue *kq)
+{
+        BUG_ON(!kq);
+
+        kq->uninitialize(kq);
+        kfree(kq);
+}
+
+static __attribute__((unused)) void test_kq(struct kfd_dev *dev)
+{
+        struct kernel_queue *kq;
+        uint32_t *buffer, i;
+        int retval;
+
+        BUG_ON(!dev);
+
+        pr_debug("kfd: starting kernel queue test\n");
+
+        kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_HIQ);
+        BUG_ON(!kq);
+
+        retval = kq->acquire_packet_buffer(kq, 5, &buffer);
+        BUG_ON(retval != 0);
+        for (i = 0; i < 5; i++)
+                buffer[i] = kq->nop_packet;
+        kq->submit_packet(kq);
+        kq->sync_with_hw(kq, 1000);
+
+        pr_debug("kfd: ending kernel queue test\n");
+}
+
+