1 files changed, 0 insertions, 445 deletions
diff --git a/drivers/misc/habanalabs/common/context.c b/drivers/misc/habanalabs/common/context.c
deleted file mode 100644
index 9c8b1b37b510..000000000000
--- a/drivers/misc/habanalabs/common/context.c
+++ /dev/null
@@ -1,445 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-
-/*
- * Copyright 2016-2021 HabanaLabs, Ltd.
- * All Rights Reserved.
- */
-
-#include "habanalabs.h"
-
-#include <linux/slab.h>
-
-static void encaps_handle_do_release(struct hl_cs_encaps_sig_handle *handle, bool put_hw_sob,
-					bool put_ctx)
-{
-	struct hl_encaps_signals_mgr *mgr = &handle->ctx->sig_mgr;
-
-	if (put_hw_sob)
-		hw_sob_put(handle->hw_sob);
-
-	spin_lock(&mgr->lock);
-	idr_remove(&mgr->handles, handle->id);
-	spin_unlock(&mgr->lock);
-
-	if (put_ctx)
-		hl_ctx_put(handle->ctx);
-
-	kfree(handle);
-}
-
-void hl_encaps_release_handle_and_put_ctx(struct kref *ref)
-{
-	struct hl_cs_encaps_sig_handle *handle =
-			container_of(ref, struct hl_cs_encaps_sig_handle, refcount);
-
-	encaps_handle_do_release(handle, false, true);
-}
-
-static void hl_encaps_release_handle_and_put_sob(struct kref *ref)
-{
-	struct hl_cs_encaps_sig_handle *handle =
-			container_of(ref, struct hl_cs_encaps_sig_handle, refcount);
-
-	encaps_handle_do_release(handle, true, false);
-}
-
-void hl_encaps_release_handle_and_put_sob_ctx(struct kref *ref)
-{
-	struct hl_cs_encaps_sig_handle *handle =
-			container_of(ref, struct hl_cs_encaps_sig_handle, refcount);
-
-	encaps_handle_do_release(handle, true, true);
-}
-
-static void hl_encaps_sig_mgr_init(struct hl_encaps_signals_mgr *mgr)
-{
-	spin_lock_init(&mgr->lock);
-	idr_init(&mgr->handles);
-}
-
-static void hl_encaps_sig_mgr_fini(struct hl_device *hdev, struct hl_encaps_signals_mgr *mgr)
-{
-	struct hl_cs_encaps_sig_handle *handle;
-	struct idr *idp;
-	u32 id;
-
-	idp = &mgr->handles;
-
-	/* The IDR is expected to be empty at this stage, because any left signal should have been
-	 * released as part of CS roll-back.
-	 */
-	if (!idr_is_empty(idp)) {
-		dev_warn(hdev->dev,
-			"device released while some encaps signals handles are still allocated\n");
-		idr_for_each_entry(idp, handle, id)
-			kref_put(&handle->refcount, hl_encaps_release_handle_and_put_sob);
-	}
-
-	idr_destroy(&mgr->handles);
-}
-
-static void hl_ctx_fini(struct hl_ctx *ctx)
-{
-	struct hl_device *hdev = ctx->hdev;
-	int i;
-
-	/* Release all allocated HW block mapped list entries and destroy
-	 * the mutex.
-	 */
-	hl_hw_block_mem_fini(ctx);
-
-	/*
-	 * If we arrived here, there are no jobs waiting for this context
-	 * on its queues so we can safely remove it.
-	 * This is because for each CS, we increment the ref count and for
-	 * every CS that was finished we decrement it and we won't arrive
-	 * to this function unless the ref count is 0
-	 */
-
-	for (i = 0 ; i < hdev->asic_prop.max_pending_cs ; i++)
-		hl_fence_put(ctx->cs_pending[i]);
-
-	kfree(ctx->cs_pending);
-
-	if (ctx->asid != HL_KERNEL_ASID_ID) {
-		dev_dbg(hdev->dev, "closing user context %d\n", ctx->asid);
-
-		/* The engines are stopped as there is no executing CS, but the
-		 * Coresight might be still working by accessing addresses
-		 * related to the stopped engines. Hence stop it explicitly.
-		 */
-		if (hdev->in_debug)
-			hl_device_set_debug_mode(hdev, ctx, false);
-
-		hdev->asic_funcs->ctx_fini(ctx);
-
-		hl_dec_ctx_fini(ctx);
-
-		hl_cb_va_pool_fini(ctx);
-		hl_vm_ctx_fini(ctx);
-		hl_asid_free(hdev, ctx->asid);
-		hl_encaps_sig_mgr_fini(hdev, &ctx->sig_mgr);
-	} else {
-		dev_dbg(hdev->dev, "closing kernel context\n");
-		hdev->asic_funcs->ctx_fini(ctx);
-		hl_vm_ctx_fini(ctx);
-		hl_mmu_ctx_fini(ctx);
-	}
-}
-
-void hl_ctx_do_release(struct kref *ref)
-{
-	struct hl_ctx *ctx;
-
-	ctx = container_of(ref, struct hl_ctx, refcount);
-
-	hl_ctx_fini(ctx);
-
-	if (ctx->hpriv) {
-		struct hl_fpriv *hpriv = ctx->hpriv;
-
-		mutex_lock(&hpriv->ctx_lock);
-		hpriv->ctx = NULL;
-		mutex_unlock(&hpriv->ctx_lock);
-
-		hl_hpriv_put(hpriv);
-	}
-
-	kfree(ctx);
-}
-
-int hl_ctx_create(struct hl_device *hdev, struct hl_fpriv *hpriv)
-{
-	struct hl_ctx_mgr *ctx_mgr = &hpriv->ctx_mgr;
-	struct hl_ctx *ctx;
-	int rc;
-
-	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
-	if (!ctx) {
-		rc = -ENOMEM;
-		goto out_err;
-	}
-
-	mutex_lock(&ctx_mgr->lock);
-	rc = idr_alloc(&ctx_mgr->handles, ctx, 1, 0, GFP_KERNEL);
-	mutex_unlock(&ctx_mgr->lock);
-
-	if (rc < 0) {
-		dev_err(hdev->dev, "Failed to allocate IDR for a new CTX\n");
-		goto free_ctx;
-	}
-
-	ctx->handle = rc;
-
-	rc = hl_ctx_init(hdev, ctx, false);
-	if (rc)
-		goto remove_from_idr;
-
-	hl_hpriv_get(hpriv);
-	ctx->hpriv = hpriv;
-
-	/* TODO: remove for multiple contexts per process */
-	hpriv->ctx = ctx;
-
-	/* TODO: remove the following line for multiple process support */
-	hdev->is_compute_ctx_active = true;
-
-	return 0;
-
-remove_from_idr:
-	mutex_lock(&ctx_mgr->lock);
-	idr_remove(&ctx_mgr->handles, ctx->handle);
-	mutex_unlock(&ctx_mgr->lock);
-free_ctx:
-	kfree(ctx);
-out_err:
-	return rc;
-}
-
-int hl_ctx_init(struct hl_device *hdev, struct hl_ctx *ctx, bool is_kernel_ctx)
-{
-	int rc = 0, i;
-
-	ctx->hdev = hdev;
-
-	kref_init(&ctx->refcount);
-
-	ctx->cs_sequence = 1;
-	spin_lock_init(&ctx->cs_lock);
-	atomic_set(&ctx->thread_ctx_switch_token, 1);
-	ctx->thread_ctx_switch_wait_token = 0;
-	ctx->cs_pending = kcalloc(hdev->asic_prop.max_pending_cs,
-				sizeof(struct hl_fence *),
-				GFP_KERNEL);
-	if (!ctx->cs_pending)
-		return -ENOMEM;
-
-	INIT_LIST_HEAD(&ctx->outcome_store.used_list);
-	INIT_LIST_HEAD(&ctx->outcome_store.free_list);
-	hash_init(ctx->outcome_store.outcome_map);
-	for (i = 0; i < ARRAY_SIZE(ctx->outcome_store.nodes_pool); ++i)
-		list_add(&ctx->outcome_store.nodes_pool[i].list_link,
-			 &ctx->outcome_store.free_list);
-
-	hl_hw_block_mem_init(ctx);
-
-	if (is_kernel_ctx) {
-		ctx->asid = HL_KERNEL_ASID_ID; /* Kernel driver gets ASID 0 */
-		rc = hl_vm_ctx_init(ctx);
-		if (rc) {
-			dev_err(hdev->dev, "Failed to init mem ctx module\n");
-			rc = -ENOMEM;
-			goto err_hw_block_mem_fini;
-		}
-
-		rc = hdev->asic_funcs->ctx_init(ctx);
-		if (rc) {
-			dev_err(hdev->dev, "ctx_init failed\n");
-			goto err_vm_ctx_fini;
-		}
-	} else {
-		ctx->asid = hl_asid_alloc(hdev);
-		if (!ctx->asid) {
-			dev_err(hdev->dev, "No free ASID, failed to create context\n");
-			rc = -ENOMEM;
-			goto err_hw_block_mem_fini;
-		}
-
-		rc = hl_vm_ctx_init(ctx);
-		if (rc) {
-			dev_err(hdev->dev, "Failed to init mem ctx module\n");
-			rc = -ENOMEM;
-			goto err_asid_free;
-		}
-
-		rc = hl_cb_va_pool_init(ctx);
-		if (rc) {
-			dev_err(hdev->dev,
-				"Failed to init VA pool for mapped CB\n");
-			goto err_vm_ctx_fini;
-		}
-
-		rc = hdev->asic_funcs->ctx_init(ctx);
-		if (rc) {
-			dev_err(hdev->dev, "ctx_init failed\n");
-			goto err_cb_va_pool_fini;
-		}
-
-		hl_encaps_sig_mgr_init(&ctx->sig_mgr);
-
-		dev_dbg(hdev->dev, "create user context %d\n", ctx->asid);
-	}
-
-	return 0;
-
-err_cb_va_pool_fini:
-	hl_cb_va_pool_fini(ctx);
-err_vm_ctx_fini:
-	hl_vm_ctx_fini(ctx);
-err_asid_free:
-	if (ctx->asid != HL_KERNEL_ASID_ID)
-		hl_asid_free(hdev, ctx->asid);
-err_hw_block_mem_fini:
-	hl_hw_block_mem_fini(ctx);
-	kfree(ctx->cs_pending);
-
-	return rc;
-}
-
-static int hl_ctx_get_unless_zero(struct hl_ctx *ctx)
-{
-	return kref_get_unless_zero(&ctx->refcount);
-}
-
-void hl_ctx_get(struct hl_ctx *ctx)
-{
-	kref_get(&ctx->refcount);
-}
-
-int hl_ctx_put(struct hl_ctx *ctx)
-{
-	return kref_put(&ctx->refcount, hl_ctx_do_release);
-}
-
-struct hl_ctx *hl_get_compute_ctx(struct hl_device *hdev)
-{
-	struct hl_ctx *ctx = NULL;
-	struct hl_fpriv *hpriv;
-
-	mutex_lock(&hdev->fpriv_list_lock);
-
-	list_for_each_entry(hpriv, &hdev->fpriv_list, dev_node) {
-		mutex_lock(&hpriv->ctx_lock);
-		ctx = hpriv->ctx;
-		if (ctx && !hl_ctx_get_unless_zero(ctx))
-			ctx = NULL;
-		mutex_unlock(&hpriv->ctx_lock);
-
-		/* There can only be a single user which has opened the compute device, so exit
-		 * immediately once we find its context or if we see that it has been released
-		 */
-		break;
-	}
-
-	mutex_unlock(&hdev->fpriv_list_lock);
-
-	return ctx;
-}
-
-/*
- * hl_ctx_get_fence_locked - get CS fence under CS lock
- *
- * @ctx: pointer to the context structure.
- * @seq: CS sequences number
- *
- * @return valid fence pointer on success, NULL if fence is gone, otherwise
- *         error pointer.
- *
- * NOTE: this function shall be called with cs_lock locked
- */
-static struct hl_fence *hl_ctx_get_fence_locked(struct hl_ctx *ctx, u64 seq)
-{
-	struct asic_fixed_properties *asic_prop = &ctx->hdev->asic_prop;
-	struct hl_fence *fence;
-
-	if (seq >= ctx->cs_sequence)
-		return ERR_PTR(-EINVAL);
-
-	if (seq + asic_prop->max_pending_cs < ctx->cs_sequence)
-		return NULL;
-
-	fence = ctx->cs_pending[seq & (asic_prop->max_pending_cs - 1)];
-	hl_fence_get(fence);
-	return fence;
-}
-
-struct hl_fence *hl_ctx_get_fence(struct hl_ctx *ctx, u64 seq)
-{
-	struct hl_fence *fence;
-
-	spin_lock(&ctx->cs_lock);
-
-	fence = hl_ctx_get_fence_locked(ctx, seq);
-
-	spin_unlock(&ctx->cs_lock);
-
-	return fence;
-}
-
-/*
- * hl_ctx_get_fences - get multiple CS fences under the same CS lock
- *
- * @ctx: pointer to the context structure.
- * @seq_arr: array of CS sequences to wait for
- * @fence: fence array to store the CS fences
- * @arr_len: length of seq_arr and fence_arr
- *
- * @return 0 on success, otherwise non 0 error code
- */
-int hl_ctx_get_fences(struct hl_ctx *ctx, u64 *seq_arr,
-				struct hl_fence **fence, u32 arr_len)
-{
-	struct hl_fence **fence_arr_base = fence;
-	int i, rc = 0;
-
-	spin_lock(&ctx->cs_lock);
-
-	for (i = 0; i < arr_len; i++, fence++) {
-		u64 seq = seq_arr[i];
-
-		*fence = hl_ctx_get_fence_locked(ctx, seq);
-
-		if (IS_ERR(*fence)) {
-			dev_err(ctx->hdev->dev,
-				"Failed to get fence for CS with seq 0x%llx\n",
-					seq);
-			rc = PTR_ERR(*fence);
-			break;
-		}
-	}
-
-	spin_unlock(&ctx->cs_lock);
-
-	if (rc)
-		hl_fences_put(fence_arr_base, i);
-
-	return rc;
-}
-
-/*
- * hl_ctx_mgr_init - initialize the context manager
- *
- * @ctx_mgr: pointer to context manager structure
- *
- * This manager is an object inside the hpriv object of the user process.
- * The function is called when a user process opens the FD.
- */
-void hl_ctx_mgr_init(struct hl_ctx_mgr *ctx_mgr)
-{
-	mutex_init(&ctx_mgr->lock);
-	idr_init(&ctx_mgr->handles);
-}
-
-/*
- * hl_ctx_mgr_fini - finalize the context manager
- *
- * @hdev: pointer to device structure
- * @ctx_mgr: pointer to context manager structure
- *
- * This function goes over all the contexts in the manager and frees them.
- * It is called when a process closes the FD.
- */
-void hl_ctx_mgr_fini(struct hl_device *hdev, struct hl_ctx_mgr *ctx_mgr)
-{
-	struct hl_ctx *ctx;
-	struct idr *idp;
-	u32 id;
-
-	idp = &ctx_mgr->handles;
-
-	idr_for_each_entry(idp, ctx, id)
-		kref_put(&ctx->refcount, hl_ctx_do_release);
-
-	idr_destroy(&ctx_mgr->handles);
-	mutex_destroy(&ctx_mgr->lock);
-}