--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2026, Advanced Micro Devices, Inc.
+ */
+
+#include <drm/amdxdna_accel.h>
+#include <drm/drm_device.h>
+#include <drm/drm_gem.h>
+#include <drm/drm_gem_shmem_helper.h>
+#include <drm/drm_print.h>
+#include <drm/gpu_scheduler.h>
+#include <linux/types.h>
+
+#include "aie.h"
+#include "aie4_host_queue.h"
+#include "aie4_msg_priv.h"
+#include "aie4_pci.h"
+#include "amdxdna_ctx.h"
+#include "amdxdna_gem.h"
+#include "amdxdna_mailbox.h"
+#include "amdxdna_mailbox_helper.h"
+#include "amdxdna_pci_drv.h"
+
+static irqreturn_t cert_comp_isr(int irq, void *p)
+{
+ struct cert_comp *cert_comp = p;
+
+ wake_up_all(&cert_comp->waitq);
+ return IRQ_HANDLED;
+}
+
+static struct cert_comp *aie4_lookup_cert_comp(struct amdxdna_dev_hdl *ndev, u32 msix_idx)
+{
+ struct amdxdna_dev *xdna = ndev->aie.xdna;
+ struct pci_dev *pdev = to_pci_dev(xdna->ddev.dev);
+ struct cert_comp *cert_comp;
+ int ret;
+
+ guard(mutex)(&ndev->cert_comp_lock);
+
+ cert_comp = xa_load(&ndev->cert_comp_xa, msix_idx);
+ if (cert_comp) {
+ kref_get(&cert_comp->kref);
+ return cert_comp;
+ }
+
+ cert_comp = kzalloc_obj(*cert_comp);
+ if (!cert_comp)
+ return NULL;
+
+ cert_comp->ndev = ndev;
+ cert_comp->msix_idx = msix_idx;
+ init_waitqueue_head(&cert_comp->waitq);
+ kref_init(&cert_comp->kref);
+
+ ret = pci_irq_vector(pdev, cert_comp->msix_idx);
+ if (ret < 0) {
+ XDNA_ERR(xdna, "MSI-X idx %u is invalid, ret:%d", msix_idx, ret);
+ goto free_cert_comp;
+ }
+ cert_comp->irq = ret;
+
+ ret = request_irq(cert_comp->irq, cert_comp_isr, 0, "xdna_hsa", cert_comp);
+ if (ret) {
+ XDNA_ERR(xdna, "request irq %d failed %d", cert_comp->irq, ret);
+ goto free_cert_comp;
+ }
+
+ ret = xa_err(xa_store(&ndev->cert_comp_xa, msix_idx, cert_comp, GFP_KERNEL));
+ if (ret) {
+ XDNA_ERR(xdna, "store cert_comp for msix idx %d failed %d", msix_idx, ret);
+ goto free_irq;
+ }
+
+ return cert_comp;
+
+free_irq:
+ free_irq(cert_comp->irq, cert_comp);
+free_cert_comp:
+ kfree(cert_comp);
+ return NULL;
+}
+
+static void cert_comp_release(struct kref *kref)
+{
+ struct cert_comp *cert_comp = container_of(kref, struct cert_comp, kref);
+ struct amdxdna_dev_hdl *ndev = cert_comp->ndev;
+
+ drm_WARN_ON(&ndev->aie.xdna->ddev, !mutex_is_locked(&ndev->cert_comp_lock));
+
+ xa_erase(&ndev->cert_comp_xa, cert_comp->msix_idx);
+ free_irq(cert_comp->irq, cert_comp);
+ kfree(cert_comp);
+}
+
+static void aie4_put_cert_comp(struct cert_comp *cert_comp)
+{
+ struct amdxdna_dev_hdl *ndev;
+
+ ndev = cert_comp->ndev;
+ guard(mutex)(&ndev->cert_comp_lock);
+ kref_put(&cert_comp->kref, cert_comp_release);
+}
+
+static int aie4_msg_destroy_context(struct amdxdna_dev_hdl *ndev, u32 hw_context_id)
+{
+ DECLARE_AIE_MSG(aie4_msg_destroy_hw_context, AIE4_MSG_OP_DESTROY_HW_CONTEXT);
+
+ req.hw_context_id = hw_context_id;
+ return aie_send_mgmt_msg_wait(&ndev->aie, &msg);
+}
+
+static int aie4_hwctx_create(struct amdxdna_hwctx *hwctx)
+{
+ DECLARE_AIE_MSG(aie4_msg_create_hw_context, AIE4_MSG_OP_CREATE_HW_CONTEXT);
+ struct amdxdna_client *client = hwctx->client;
+ struct amdxdna_hwctx_priv *priv = hwctx->priv;
+ struct amdxdna_dev *xdna = hwctx->client->xdna;
+ struct amdxdna_dev_hdl *ndev = xdna->dev_handle;
+ int ret;
+
+ drm_WARN_ON(&xdna->ddev, !mutex_is_locked(&xdna->dev_lock));
+
+ if (!ndev->partition_id || !hwctx->num_tiles) {
+ XDNA_ERR(xdna, "invalid request partition_id %d, num_tiles %d",
+ ndev->partition_id, hwctx->num_tiles);
+ return -EINVAL;
+ }
+
+ req.partition_id = ndev->partition_id;
+ req.request_num_tiles = hwctx->num_tiles;
+ req.pasid = FIELD_PREP(AIE4_MSG_PASID, client->pasid) |
+ FIELD_PREP(AIE4_MSG_PASID_VLD, 1);
+ req.priority_band = hwctx->qos.priority;
+
+ req.hsa_addr_high = upper_32_bits(amdxdna_gem_dev_addr(priv->umq_bo));
+ req.hsa_addr_low = lower_32_bits(amdxdna_gem_dev_addr(priv->umq_bo));
+
+ XDNA_DBG(xdna, "pasid 0x%x, num_tiles %d, hsa[0x%x 0x%x]",
+ req.pasid, req.request_num_tiles, req.hsa_addr_high, req.hsa_addr_low);
+
+ ret = aie_send_mgmt_msg_wait(&ndev->aie, &msg);
+ if (ret) {
+ XDNA_ERR(xdna, "create ctx failed: %d", ret);
+ return ret;
+ }
+
+ XDNA_DBG(xdna, "resp msix: %d, ctx id: %d, doorbell: %d",
+ resp.job_complete_msix_idx,
+ resp.hw_context_id,
+ resp.doorbell_offset);
+
+ /* setup interrupt completion per msix index */
+ priv->cert_comp = aie4_lookup_cert_comp(ndev, resp.job_complete_msix_idx);
+ if (!priv->cert_comp) {
+ aie4_msg_destroy_context(ndev, resp.hw_context_id);
+ return -EINVAL;
+ }
+
+ priv->hw_ctx_id = resp.hw_context_id;
+ hwctx->doorbell_offset = resp.doorbell_offset;
+
+ return 0;
+}
+
+static void aie4_hwctx_destroy(struct amdxdna_hwctx *hwctx)
+{
+ struct amdxdna_client *client = hwctx->client;
+ struct amdxdna_hwctx_priv *priv = hwctx->priv;
+ struct amdxdna_dev *xdna = client->xdna;
+ struct amdxdna_dev_hdl *ndev = xdna->dev_handle;
+
+ drm_WARN_ON(&xdna->ddev, !mutex_is_locked(&xdna->dev_lock));
+
+ aie4_msg_destroy_context(ndev, priv->hw_ctx_id);
+ aie4_put_cert_comp(priv->cert_comp);
+}
+
+static void aie4_hwctx_umq_fini(struct amdxdna_hwctx *hwctx)
+{
+ if (hwctx->priv && hwctx->priv->umq_bo)
+ amdxdna_gem_put_obj(hwctx->priv->umq_bo);
+}
+
+static int aie4_hwctx_umq_init(struct amdxdna_hwctx *hwctx)
+{
+ struct amdxdna_hwctx_priv *priv = hwctx->priv;
+ struct amdxdna_dev *xdna = hwctx->client->xdna;
+ struct amdxdna_gem_obj *umq_bo;
+ struct host_queue_header *qhdr;
+ int ret;
+
+ umq_bo = amdxdna_gem_get_obj(hwctx->client, hwctx->umq_bo_hdl, AMDXDNA_BO_SHARE);
+ if (!umq_bo) {
+ XDNA_ERR(xdna, "cannot find umq_bo handle %d", hwctx->umq_bo_hdl);
+ return -ENOENT;
+ }
+ if (umq_bo->mem.size < sizeof(*qhdr)) {
+ XDNA_ERR(xdna, "umq_bo size is too small");
+ ret = -EINVAL;
+ goto put_umq_bo;
+ }
+
+ /* get kva address for host queue read index and write index */
+ qhdr = amdxdna_gem_vmap(umq_bo);
+ if (!qhdr) {
+ ret = -ENOMEM;
+ goto put_umq_bo;
+ }
+
+ priv->umq_bo = umq_bo;
+ priv->umq_read_index = &qhdr->read_index;
+ priv->umq_write_index = &qhdr->write_index;
+
+ return 0;
+
+put_umq_bo:
+ amdxdna_gem_put_obj(umq_bo);
+ return ret;
+}
+
+int aie4_hwctx_init(struct amdxdna_hwctx *hwctx)
+{
+ struct amdxdna_client *client = hwctx->client;
+ struct amdxdna_dev *xdna = client->xdna;
+ struct amdxdna_hwctx_priv *priv;
+ int ret;
+
+ priv = kzalloc_obj(*priv);
+ if (!priv)
+ return -ENOMEM;
+ hwctx->priv = priv;
+
+ ret = aie4_hwctx_umq_init(hwctx);
+ if (ret)
+ goto free_priv;
+
+ ret = aie4_hwctx_create(hwctx);
+ if (ret)
+ goto umq_fini;
+
+ XDNA_DBG(xdna, "hwctx %s init completed", hwctx->name);
+ return 0;
+
+umq_fini:
+ aie4_hwctx_umq_fini(hwctx);
+free_priv:
+ kfree(priv);
+ hwctx->priv = NULL;
+ return ret;
+}
+
+void aie4_hwctx_fini(struct amdxdna_hwctx *hwctx)
+{
+ aie4_hwctx_destroy(hwctx);
+ aie4_hwctx_umq_fini(hwctx);
+ kfree(hwctx->priv);
+}
projects / thirdparty / kernel / linux.git / commitdiff
