[linux-2.6-block.git] / drivers / misc / cxl / irq.c

/*
 * Copyright 2014 IBM Corp.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#include <linux/interrupt.h>
#include <linux/workqueue.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include <linux/slab.h>
#include <linux/pid.h>
#include <asm/cputable.h>
#include <misc/cxl-base.h>

#include "cxl.h"
#include "trace.h"

static irqreturn_t schedule_cxl_fault(struct cxl_context *ctx, u64 dsisr, u64 dar)
{
	ctx->dsisr = dsisr;
	ctx->dar = dar;
	schedule_work(&ctx->fault_work);
	return IRQ_HANDLED;
}

irqreturn_t cxl_irq(int irq, void *data, struct cxl_irq_info *irq_info)
{
	struct cxl_context *ctx = data;
	u64 dsisr, dar;

	dsisr = irq_info->dsisr;
	dar = irq_info->dar;

	trace_cxl_psl_irq(ctx, irq, dsisr, dar);

	pr_devel("CXL interrupt %i for afu pe: %i DSISR: %#llx DAR: %#llx\n", irq, ctx->pe, dsisr, dar);

	if (dsisr & CXL_PSL_DSISR_An_DS) {
		/*
		 * We don't inherently need to sleep to handle this, but we do
		 * need to get a ref to the task's mm, which we can't do from
		 * irq context without the potential for a deadlock since it
		 * takes the task_lock. An alternate option would be to keep a
		 * reference to the task's mm the entire time it has cxl open,
		 * but to do that we need to solve the issue where we hold a
		 * ref to the mm, but the mm can hold a ref to the fd after an
		 * mmap preventing anything from being cleaned up.
		 */
		pr_devel("Scheduling segment miss handling for later pe: %i\n", ctx->pe);
		return schedule_cxl_fault(ctx, dsisr, dar);
	}

	if (dsisr & CXL_PSL_DSISR_An_M)
		pr_devel("CXL interrupt: PTE not found\n");
	if (dsisr & CXL_PSL_DSISR_An_P)
		pr_devel("CXL interrupt: Storage protection violation\n");
	if (dsisr & CXL_PSL_DSISR_An_A)
		pr_devel("CXL interrupt: AFU lock access to write through or cache inhibited storage\n");
	if (dsisr & CXL_PSL_DSISR_An_S)
		pr_devel("CXL interrupt: Access was afu_wr or afu_zero\n");
	if (dsisr & CXL_PSL_DSISR_An_K)
		pr_devel("CXL interrupt: Access not permitted by virtual page class key protection\n");

	if (dsisr & CXL_PSL_DSISR_An_DM) {
		/*
		 * In some cases we might be able to handle the fault
		 * immediately if hash_page would succeed, but we still need
		 * the task's mm, which as above we can't get without a lock
		 */
		pr_devel("Scheduling page fault handling for later pe: %i\n", ctx->pe);
		return schedule_cxl_fault(ctx, dsisr, dar);
	}
	if (dsisr & CXL_PSL_DSISR_An_ST)
		WARN(1, "CXL interrupt: Segment Table PTE not found\n");
	if (dsisr & CXL_PSL_DSISR_An_UR)
		pr_devel("CXL interrupt: AURP PTE not found\n");
	if (dsisr & CXL_PSL_DSISR_An_PE)
		return handle_psl_slice_error(ctx, dsisr, irq_info->errstat);
	if (dsisr & CXL_PSL_DSISR_An_AE) {
		pr_devel("CXL interrupt: AFU Error 0x%016llx\n", irq_info->afu_err);

		if (ctx->pending_afu_err) {
			/*
			 * This shouldn't happen - the PSL treats these errors
			 * as fatal and will have reset the AFU, so there's not
			 * much point buffering multiple AFU errors.
			 * OTOH if we DO ever see a storm of these come in it's
			 * probably best that we log them somewhere:
			 */
			dev_err_ratelimited(&ctx->afu->dev, "CXL AFU Error "
					    "undelivered to pe %i: 0x%016llx\n",
					    ctx->pe, irq_info->afu_err);
		} else {
			spin_lock(&ctx->lock);
			ctx->afu_err = irq_info->afu_err;
			ctx->pending_afu_err = 1;
			spin_unlock(&ctx->lock);

			wake_up_all(&ctx->wq);
		}

		cxl_ack_irq(ctx, CXL_PSL_TFC_An_A, 0);
		return IRQ_HANDLED;
	}
	if (dsisr & CXL_PSL_DSISR_An_OC)
		pr_devel("CXL interrupt: OS Context Warning\n");

	WARN(1, "Unhandled CXL PSL IRQ\n");
	return IRQ_HANDLED;
}

static irqreturn_t cxl_irq_afu(int irq, void *data)
{
	struct cxl_context *ctx = data;
	irq_hw_number_t hwirq = irqd_to_hwirq(irq_get_irq_data(irq));
	int irq_off, afu_irq = 1;
	__u16 range;
	int r;

	for (r = 1; r < CXL_IRQ_RANGES; r++) {
		irq_off = hwirq - ctx->irqs.offset[r];
		range = ctx->irqs.range[r];
		if (irq_off >= 0 && irq_off < range) {
			afu_irq += irq_off;
			break;
		}
		afu_irq += range;
	}
	if (unlikely(r >= CXL_IRQ_RANGES)) {
		WARN(1, "Recieved AFU IRQ out of range for pe %i (virq %i hwirq %lx)\n",
		     ctx->pe, irq, hwirq);
		return IRQ_HANDLED;
	}

	trace_cxl_afu_irq(ctx, afu_irq, irq, hwirq);
	pr_devel("Received AFU interrupt %i for pe: %i (virq %i hwirq %lx)\n",
	       afu_irq, ctx->pe, irq, hwirq);

	if (unlikely(!ctx->irq_bitmap)) {
		WARN(1, "Recieved AFU IRQ for context with no IRQ bitmap\n");
		return IRQ_HANDLED;
	}
	spin_lock(&ctx->lock);
	set_bit(afu_irq - 1, ctx->irq_bitmap);
	ctx->pending_irq = true;
	spin_unlock(&ctx->lock);

	wake_up_all(&ctx->wq);

	return IRQ_HANDLED;
}

unsigned int cxl_map_irq(struct cxl *adapter, irq_hw_number_t hwirq,
			 irq_handler_t handler, void *cookie, const char *name)
{
	unsigned int virq;
	int result;

	/* IRQ Domain? */
	virq = irq_create_mapping(NULL, hwirq);
	if (!virq) {
		dev_warn(&adapter->dev, "cxl_map_irq: irq_create_mapping failed\n");
		return 0;
	}

	cxl_setup_irq(adapter, hwirq, virq);

	pr_devel("hwirq %#lx mapped to virq %u\n", hwirq, virq);

	result = request_irq(virq, handler, 0, name, cookie);
	if (result) {
		dev_warn(&adapter->dev, "cxl_map_irq: request_irq failed: %i\n", result);
		return 0;
	}

	return virq;
}

void cxl_unmap_irq(unsigned int virq, void *cookie)
{
	free_irq(virq, cookie);
	irq_dispose_mapping(virq);
}

int cxl_register_one_irq(struct cxl *adapter,
			irq_handler_t handler,
			void *cookie,
			irq_hw_number_t *dest_hwirq,
			unsigned int *dest_virq,
			const char *name)
{
	int hwirq, virq;

	if ((hwirq = cxl_alloc_one_irq(adapter)) < 0)
		return hwirq;

	if (!(virq = cxl_map_irq(adapter, hwirq, handler, cookie, name)))
		goto err;

	*dest_hwirq = hwirq;
	*dest_virq = virq;

	return 0;

err:
	cxl_release_one_irq(adapter, hwirq);
	return -ENOMEM;
}

void afu_irq_name_free(struct cxl_context *ctx)
{
	struct cxl_irq_name *irq_name, *tmp;

	list_for_each_entry_safe(irq_name, tmp, &ctx->irq_names, list) {
		kfree(irq_name->name);
		list_del(&irq_name->list);
		kfree(irq_name);
	}
}

int afu_allocate_irqs(struct cxl_context *ctx, u32 count)
{
	int rc, r, i, j = 1;
	struct cxl_irq_name *irq_name;

	/* Initialize the list head to hold irq names */
	INIT_LIST_HEAD(&ctx->irq_names);

	if ((rc = cxl_alloc_irq_ranges(&ctx->irqs, ctx->afu->adapter, count)))
		return rc;

	/* Multiplexed PSL Interrupt */
	ctx->irqs.offset[0] = ctx->afu->psl_hwirq;
	ctx->irqs.range[0] = 1;

	ctx->irq_count = count;
	ctx->irq_bitmap = kcalloc(BITS_TO_LONGS(count),
				  sizeof(*ctx->irq_bitmap), GFP_KERNEL);
	if (!ctx->irq_bitmap)
		goto out;

	/*
	 * Allocate names first.  If any fail, bail out before allocating
	 * actual hardware IRQs.
	 */
	for (r = 1; r < CXL_IRQ_RANGES; r++) {
		for (i = 0; i < ctx->irqs.range[r]; i++) {
			irq_name = kmalloc(sizeof(struct cxl_irq_name),
					   GFP_KERNEL);
			if (!irq_name)
				goto out;
			irq_name->name = kasprintf(GFP_KERNEL, "cxl-%s-pe%i-%i",
						   dev_name(&ctx->afu->dev),
						   ctx->pe, j);
			if (!irq_name->name) {
				kfree(irq_name);
				goto out;
			}
			/* Add to tail so next look get the correct order */
			list_add_tail(&irq_name->list, &ctx->irq_names);
			j++;
		}
	}
	return 0;

out:
	cxl_release_irq_ranges(&ctx->irqs, ctx->afu->adapter);
	afu_irq_name_free(ctx);
	return -ENOMEM;
}

static void afu_register_hwirqs(struct cxl_context *ctx)
{
	irq_hw_number_t hwirq;
	struct cxl_irq_name *irq_name;
	int r,i;

	/* We've allocated all memory now, so let's do the irq allocations */
	irq_name = list_first_entry(&ctx->irq_names, struct cxl_irq_name, list);
	for (r = 1; r < CXL_IRQ_RANGES; r++) {
		hwirq = ctx->irqs.offset[r];
		for (i = 0; i < ctx->irqs.range[r]; hwirq++, i++) {
			cxl_map_irq(ctx->afu->adapter, hwirq,
				    cxl_irq_afu, ctx, irq_name->name);
			irq_name = list_next_entry(irq_name, list);
		}
	}
}

int afu_register_irqs(struct cxl_context *ctx, u32 count)
{
	int rc;

	rc = afu_allocate_irqs(ctx, count);
	if (rc)
		return rc;

	afu_register_hwirqs(ctx);
	return 0;
}

void afu_release_irqs(struct cxl_context *ctx, void *cookie)
{
	irq_hw_number_t hwirq;
	unsigned int virq;
	int r, i;

	for (r = 1; r < CXL_IRQ_RANGES; r++) {
		hwirq = ctx->irqs.offset[r];
		for (i = 0; i < ctx->irqs.range[r]; hwirq++, i++) {
			virq = irq_find_mapping(NULL, hwirq);
			if (virq)
				cxl_unmap_irq(virq, cookie);
		}
	}

	afu_irq_name_free(ctx);
	cxl_release_irq_ranges(&ctx->irqs, ctx->afu->adapter);

	ctx->irq_count = 0;
}
Commit	Line	Data
f204e0b8 IM	1	/*
	2	* Copyright 2014 IBM Corp.
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* as published by the Free Software Foundation; either version
	7	* 2 of the License, or (at your option) any later version.
	8	*/
	9
	10	#include <linux/interrupt.h>
	11	#include <linux/workqueue.h>
	12	#include <linux/sched.h>
	13	#include <linux/wait.h>
	14	#include <linux/slab.h>
	15	#include <linux/pid.h>
	16	#include <asm/cputable.h>
ec249dd8	17	#include <misc/cxl-base.h>
f204e0b8 IM	18
f204e0b8 IM	19	#include "cxl.h"
9bcf28cd	20	#include "trace.h"
f204e0b8	21
f204e0b8 IM	22	static irqreturn_t schedule_cxl_fault(struct cxl_context *ctx, u64 dsisr, u64 dar)
	23	{
	24	ctx->dsisr = dsisr;
	25	ctx->dar = dar;
	26	schedule_work(&ctx->fault_work);
	27	return IRQ_HANDLED;
	28	}
	29
86331862	30	irqreturn_t cxl_irq(int irq, void data, struct cxl_irq_info irq_info)
f204e0b8 IM	31	{
f204e0b8 IM	32	struct cxl_context *ctx = data;
f204e0b8	33	u64 dsisr, dar;
f204e0b8	34
bc78b05b IM	35	dsisr = irq_info->dsisr;
bc78b05b IM	36	dar = irq_info->dar;
f204e0b8	37
9bcf28cd IM	38	trace_cxl_psl_irq(ctx, irq, dsisr, dar);
9bcf28cd IM	39
f204e0b8 IM	40	pr_devel("CXL interrupt %i for afu pe: %i DSISR: %#llx DAR: %#llx\n", irq, ctx->pe, dsisr, dar);
	41
	42	if (dsisr & CXL_PSL_DSISR_An_DS) {
	43	/*
	44	* We don't inherently need to sleep to handle this, but we do
	45	* need to get a ref to the task's mm, which we can't do from
	46	* irq context without the potential for a deadlock since it
	47	* takes the task_lock. An alternate option would be to keep a
	48	* reference to the task's mm the entire time it has cxl open,
	49	* but to do that we need to solve the issue where we hold a
	50	* ref to the mm, but the mm can hold a ref to the fd after an
	51	* mmap preventing anything from being cleaned up.
	52	*/
	53	pr_devel("Scheduling segment miss handling for later pe: %i\n", ctx->pe);
	54	return schedule_cxl_fault(ctx, dsisr, dar);
	55	}
	56
	57	if (dsisr & CXL_PSL_DSISR_An_M)
	58	pr_devel("CXL interrupt: PTE not found\n");
	59	if (dsisr & CXL_PSL_DSISR_An_P)
	60	pr_devel("CXL interrupt: Storage protection violation\n");
	61	if (dsisr & CXL_PSL_DSISR_An_A)
	62	pr_devel("CXL interrupt: AFU lock access to write through or cache inhibited storage\n");
	63	if (dsisr & CXL_PSL_DSISR_An_S)
	64	pr_devel("CXL interrupt: Access was afu_wr or afu_zero\n");
	65	if (dsisr & CXL_PSL_DSISR_An_K)
	66	pr_devel("CXL interrupt: Access not permitted by virtual page class key protection\n");
	67
	68	if (dsisr & CXL_PSL_DSISR_An_DM) {
	69	/*
	70	* In some cases we might be able to handle the fault
	71	* immediately if hash_page would succeed, but we still need
	72	* the task's mm, which as above we can't get without a lock
	73	*/
	74	pr_devel("Scheduling page fault handling for later pe: %i\n", ctx->pe);
	75	return schedule_cxl_fault(ctx, dsisr, dar);
	76	}
	77	if (dsisr & CXL_PSL_DSISR_An_ST)
	78	WARN(1, "CXL interrupt: Segment Table PTE not found\n");
	79	if (dsisr & CXL_PSL_DSISR_An_UR)
	80	pr_devel("CXL interrupt: AURP PTE not found\n");
	81	if (dsisr & CXL_PSL_DSISR_An_PE)
bc78b05b	82	return handle_psl_slice_error(ctx, dsisr, irq_info->errstat);
f204e0b8	83	if (dsisr & CXL_PSL_DSISR_An_AE) {
de369538	84	pr_devel("CXL interrupt: AFU Error 0x%016llx\n", irq_info->afu_err);
f204e0b8 IM	85
	86	if (ctx->pending_afu_err) {
	87	/*
	88	* This shouldn't happen - the PSL treats these errors
	89	* as fatal and will have reset the AFU, so there's not
	90	* much point buffering multiple AFU errors.
	91	* OTOH if we DO ever see a storm of these come in it's
	92	* probably best that we log them somewhere:
	93	*/
	94	dev_err_ratelimited(&ctx->afu->dev, "CXL AFU Error "
de369538	95	"undelivered to pe %i: 0x%016llx\n",
bc78b05b	96	ctx->pe, irq_info->afu_err);
f204e0b8 IM	97	} else {
f204e0b8 IM	98	spin_lock(&ctx->lock);
bc78b05b	99	ctx->afu_err = irq_info->afu_err;
f204e0b8 IM	100	ctx->pending_afu_err = 1;
	101	spin_unlock(&ctx->lock);
	102
	103	wake_up_all(&ctx->wq);
	104	}
	105
	106	cxl_ack_irq(ctx, CXL_PSL_TFC_An_A, 0);
a6130ed2	107	return IRQ_HANDLED;
f204e0b8 IM	108	}
	109	if (dsisr & CXL_PSL_DSISR_An_OC)
	110	pr_devel("CXL interrupt: OS Context Warning\n");
	111
	112	WARN(1, "Unhandled CXL PSL IRQ\n");
	113	return IRQ_HANDLED;
	114	}
	115
f204e0b8 IM	116	static irqreturn_t cxl_irq_afu(int irq, void *data)
	117	{
	118	struct cxl_context *ctx = data;
	119	irq_hw_number_t hwirq = irqd_to_hwirq(irq_get_irq_data(irq));
	120	int irq_off, afu_irq = 1;
	121	__u16 range;
	122	int r;
	123
	124	for (r = 1; r < CXL_IRQ_RANGES; r++) {
	125	irq_off = hwirq - ctx->irqs.offset[r];
	126	range = ctx->irqs.range[r];
	127	if (irq_off >= 0 && irq_off < range) {
	128	afu_irq += irq_off;
	129	break;
	130	}
	131	afu_irq += range;
	132	}
	133	if (unlikely(r >= CXL_IRQ_RANGES)) {
	134	WARN(1, "Recieved AFU IRQ out of range for pe %i (virq %i hwirq %lx)\n",
	135	ctx->pe, irq, hwirq);
	136	return IRQ_HANDLED;
	137	}
	138
9bcf28cd	139	trace_cxl_afu_irq(ctx, afu_irq, irq, hwirq);
f204e0b8 IM	140	pr_devel("Received AFU interrupt %i for pe: %i (virq %i hwirq %lx)\n",
	141	afu_irq, ctx->pe, irq, hwirq);
	142
	143	if (unlikely(!ctx->irq_bitmap)) {
	144	WARN(1, "Recieved AFU IRQ for context with no IRQ bitmap\n");
	145	return IRQ_HANDLED;
	146	}
	147	spin_lock(&ctx->lock);
	148	set_bit(afu_irq - 1, ctx->irq_bitmap);
	149	ctx->pending_irq = true;
	150	spin_unlock(&ctx->lock);
	151
	152	wake_up_all(&ctx->wq);
	153
	154	return IRQ_HANDLED;
	155	}
	156
	157	unsigned int cxl_map_irq(struct cxl *adapter, irq_hw_number_t hwirq,
80fa93fc	158	irq_handler_t handler, void cookie, const char name)
f204e0b8 IM	159	{
	160	unsigned int virq;
	161	int result;
	162
	163	/* IRQ Domain? */
	164	virq = irq_create_mapping(NULL, hwirq);
	165	if (!virq) {
	166	dev_warn(&adapter->dev, "cxl_map_irq: irq_create_mapping failed\n");
	167	return 0;
	168	}
	169
	170	cxl_setup_irq(adapter, hwirq, virq);
	171
	172	pr_devel("hwirq %#lx mapped to virq %u\n", hwirq, virq);
	173
80fa93fc	174	result = request_irq(virq, handler, 0, name, cookie);
f204e0b8 IM	175	if (result) {
	176	dev_warn(&adapter->dev, "cxl_map_irq: request_irq failed: %i\n", result);
	177	return 0;
	178	}
	179
	180	return virq;
	181	}
	182
	183	void cxl_unmap_irq(unsigned int virq, void *cookie)
	184	{
	185	free_irq(virq, cookie);
	186	irq_dispose_mapping(virq);
	187	}
	188
86331862 CL	189	int cxl_register_one_irq(struct cxl *adapter,
	190	irq_handler_t handler,
	191	void *cookie,
	192	irq_hw_number_t *dest_hwirq,
	193	unsigned int *dest_virq,
	194	const char *name)
f204e0b8 IM	195	{
	196	int hwirq, virq;
	197
	198	if ((hwirq = cxl_alloc_one_irq(adapter)) < 0)
	199	return hwirq;
	200
80fa93fc	201	if (!(virq = cxl_map_irq(adapter, hwirq, handler, cookie, name)))
f204e0b8 IM	202	goto err;
	203
	204	*dest_hwirq = hwirq;
	205	*dest_virq = virq;
	206
	207	return 0;
	208
	209	err:
	210	cxl_release_one_irq(adapter, hwirq);
	211	return -ENOMEM;
	212	}
	213
8dde152e	214	void afu_irq_name_free(struct cxl_context *ctx)
80fa93fc MN	215	{
	216	struct cxl_irq_name irq_name, tmp;
	217
	218	list_for_each_entry_safe(irq_name, tmp, &ctx->irq_names, list) {
	219	kfree(irq_name->name);
	220	list_del(&irq_name->list);
	221	kfree(irq_name);
	222	}
f204e0b8 IM	223	}
f204e0b8 IM	224
c358d84b	225	int afu_allocate_irqs(struct cxl_context *ctx, u32 count)
f204e0b8	226	{
80fa93fc MN	227	int rc, r, i, j = 1;
80fa93fc MN	228	struct cxl_irq_name *irq_name;
f204e0b8	229
a6897f39 VJ	230	/* Initialize the list head to hold irq names */
	231	INIT_LIST_HEAD(&ctx->irq_names);
	232
f204e0b8 IM	233	if ((rc = cxl_alloc_irq_ranges(&ctx->irqs, ctx->afu->adapter, count)))
	234	return rc;
	235
	236	/* Multiplexed PSL Interrupt */
	237	ctx->irqs.offset[0] = ctx->afu->psl_hwirq;
	238	ctx->irqs.range[0] = 1;
	239
	240	ctx->irq_count = count;
	241	ctx->irq_bitmap = kcalloc(BITS_TO_LONGS(count),
	242	sizeof(*ctx->irq_bitmap), GFP_KERNEL);
	243	if (!ctx->irq_bitmap)
a6897f39	244	goto out;
80fa93fc MN	245
	246	/*
	247	* Allocate names first. If any fail, bail out before allocating
	248	* actual hardware IRQs.
	249	*/
80fa93fc	250	for (r = 1; r < CXL_IRQ_RANGES; r++) {
d3383aaa	251	for (i = 0; i < ctx->irqs.range[r]; i++) {
80fa93fc MN	252	irq_name = kmalloc(sizeof(struct cxl_irq_name),
	253	GFP_KERNEL);
	254	if (!irq_name)
	255	goto out;
	256	irq_name->name = kasprintf(GFP_KERNEL, "cxl-%s-pe%i-%i",
	257	dev_name(&ctx->afu->dev),
	258	ctx->pe, j);
	259	if (!irq_name->name) {
	260	kfree(irq_name);
	261	goto out;
	262	}
	263	/* Add to tail so next look get the correct order */
	264	list_add_tail(&irq_name->list, &ctx->irq_names);
	265	j++;
	266	}
	267	}
c358d84b MN	268	return 0;
	269
	270	out:
a6897f39	271	cxl_release_irq_ranges(&ctx->irqs, ctx->afu->adapter);
c358d84b MN	272	afu_irq_name_free(ctx);
	273	return -ENOMEM;
	274	}
	275
3d6b040e	276	static void afu_register_hwirqs(struct cxl_context *ctx)
c358d84b MN	277	{
	278	irq_hw_number_t hwirq;
	279	struct cxl_irq_name *irq_name;
	280	int r,i;
80fa93fc MN	281
	282	/* We've allocated all memory now, so let's do the irq allocations */
	283	irq_name = list_first_entry(&ctx->irq_names, struct cxl_irq_name, list);
f204e0b8 IM	284	for (r = 1; r < CXL_IRQ_RANGES; r++) {
	285	hwirq = ctx->irqs.offset[r];
	286	for (i = 0; i < ctx->irqs.range[r]; hwirq++, i++) {
	287	cxl_map_irq(ctx->afu->adapter, hwirq,
80fa93fc MN	288	cxl_irq_afu, ctx, irq_name->name);
80fa93fc MN	289	irq_name = list_next_entry(irq_name, list);
f204e0b8 IM	290	}
f204e0b8 IM	291	}
c358d84b	292	}
f204e0b8	293
c358d84b MN	294	int afu_register_irqs(struct cxl_context *ctx, u32 count)
	295	{
	296	int rc;
80fa93fc	297
c358d84b MN	298	rc = afu_allocate_irqs(ctx, count);
	299	if (rc)
	300	return rc;
	301
	302	afu_register_hwirqs(ctx);
	303	return 0;
d56d301b	304	}
f204e0b8	305
6428832a	306	void afu_release_irqs(struct cxl_context ctx, void cookie)
f204e0b8 IM	307	{
	308	irq_hw_number_t hwirq;
	309	unsigned int virq;
	310	int r, i;
	311
	312	for (r = 1; r < CXL_IRQ_RANGES; r++) {
	313	hwirq = ctx->irqs.offset[r];
	314	for (i = 0; i < ctx->irqs.range[r]; hwirq++, i++) {
	315	virq = irq_find_mapping(NULL, hwirq);
	316	if (virq)
6428832a	317	cxl_unmap_irq(virq, cookie);
f204e0b8 IM	318	}
	319	}
	320
80fa93fc	321	afu_irq_name_free(ctx);
f204e0b8	322	cxl_release_irq_ranges(&ctx->irqs, ctx->afu->adapter);
8c7dd08a	323
8c7dd08a	324	ctx->irq_count = 0;
f204e0b8	325	}