875 lines
20 KiB
C
875 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright 2016,2017 IBM Corporation.
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*/
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#define pr_fmt(fmt) "xive: " fmt
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#include <linux/types.h>
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#include <linux/irq.h>
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#include <linux/debugfs.h>
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#include <linux/smp.h>
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#include <linux/interrupt.h>
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#include <linux/seq_file.h>
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#include <linux/init.h>
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#include <linux/of.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/delay.h>
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#include <linux/cpumask.h>
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#include <linux/mm.h>
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#include <linux/kmemleak.h>
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#include <asm/machdep.h>
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#include <asm/prom.h>
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#include <asm/io.h>
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#include <asm/smp.h>
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#include <asm/irq.h>
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#include <asm/errno.h>
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#include <asm/xive.h>
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#include <asm/xive-regs.h>
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#include <asm/opal.h>
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#include <asm/kvm_ppc.h>
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#include "xive-internal.h"
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static u32 xive_provision_size;
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static u32 *xive_provision_chips;
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static u32 xive_provision_chip_count;
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static u32 xive_queue_shift;
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static u32 xive_pool_vps = XIVE_INVALID_VP;
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static struct kmem_cache *xive_provision_cache;
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static bool xive_has_single_esc;
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bool xive_has_save_restore;
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int xive_native_populate_irq_data(u32 hw_irq, struct xive_irq_data *data)
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{
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__be64 flags, eoi_page, trig_page;
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__be32 esb_shift, src_chip;
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u64 opal_flags;
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s64 rc;
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memset(data, 0, sizeof(*data));
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rc = opal_xive_get_irq_info(hw_irq, &flags, &eoi_page, &trig_page,
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&esb_shift, &src_chip);
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if (rc) {
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pr_err("opal_xive_get_irq_info(0x%x) returned %lld\n",
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hw_irq, rc);
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return -EINVAL;
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}
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opal_flags = be64_to_cpu(flags);
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if (opal_flags & OPAL_XIVE_IRQ_STORE_EOI)
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data->flags |= XIVE_IRQ_FLAG_STORE_EOI;
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if (opal_flags & OPAL_XIVE_IRQ_STORE_EOI2)
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data->flags |= XIVE_IRQ_FLAG_STORE_EOI;
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if (opal_flags & OPAL_XIVE_IRQ_LSI)
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data->flags |= XIVE_IRQ_FLAG_LSI;
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data->eoi_page = be64_to_cpu(eoi_page);
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data->trig_page = be64_to_cpu(trig_page);
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data->esb_shift = be32_to_cpu(esb_shift);
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data->src_chip = be32_to_cpu(src_chip);
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data->eoi_mmio = ioremap(data->eoi_page, 1u << data->esb_shift);
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if (!data->eoi_mmio) {
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pr_err("Failed to map EOI page for irq 0x%x\n", hw_irq);
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return -ENOMEM;
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}
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data->hw_irq = hw_irq;
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if (!data->trig_page)
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return 0;
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if (data->trig_page == data->eoi_page) {
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data->trig_mmio = data->eoi_mmio;
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return 0;
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}
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data->trig_mmio = ioremap(data->trig_page, 1u << data->esb_shift);
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if (!data->trig_mmio) {
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pr_err("Failed to map trigger page for irq 0x%x\n", hw_irq);
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return -ENOMEM;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(xive_native_populate_irq_data);
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int xive_native_configure_irq(u32 hw_irq, u32 target, u8 prio, u32 sw_irq)
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{
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s64 rc;
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for (;;) {
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rc = opal_xive_set_irq_config(hw_irq, target, prio, sw_irq);
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if (rc != OPAL_BUSY)
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break;
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msleep(OPAL_BUSY_DELAY_MS);
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}
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return rc == 0 ? 0 : -ENXIO;
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}
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EXPORT_SYMBOL_GPL(xive_native_configure_irq);
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static int xive_native_get_irq_config(u32 hw_irq, u32 *target, u8 *prio,
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u32 *sw_irq)
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{
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s64 rc;
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__be64 vp;
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__be32 lirq;
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rc = opal_xive_get_irq_config(hw_irq, &vp, prio, &lirq);
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*target = be64_to_cpu(vp);
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*sw_irq = be32_to_cpu(lirq);
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return rc == 0 ? 0 : -ENXIO;
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}
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#define vp_err(vp, fmt, ...) pr_err("VP[0x%x]: " fmt, vp, ##__VA_ARGS__)
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/* This can be called multiple time to change a queue configuration */
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int xive_native_configure_queue(u32 vp_id, struct xive_q *q, u8 prio,
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__be32 *qpage, u32 order, bool can_escalate)
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{
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s64 rc = 0;
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__be64 qeoi_page_be;
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__be32 esc_irq_be;
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u64 flags, qpage_phys;
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/* If there's an actual queue page, clean it */
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if (order) {
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if (WARN_ON(!qpage))
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return -EINVAL;
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qpage_phys = __pa(qpage);
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} else
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qpage_phys = 0;
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/* Initialize the rest of the fields */
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q->msk = order ? ((1u << (order - 2)) - 1) : 0;
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q->idx = 0;
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q->toggle = 0;
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rc = opal_xive_get_queue_info(vp_id, prio, NULL, NULL,
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&qeoi_page_be,
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&esc_irq_be,
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NULL);
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if (rc) {
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vp_err(vp_id, "Failed to get queue %d info : %lld\n", prio, rc);
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rc = -EIO;
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goto fail;
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}
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q->eoi_phys = be64_to_cpu(qeoi_page_be);
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/* Default flags */
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flags = OPAL_XIVE_EQ_ALWAYS_NOTIFY | OPAL_XIVE_EQ_ENABLED;
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/* Escalation needed ? */
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if (can_escalate) {
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q->esc_irq = be32_to_cpu(esc_irq_be);
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flags |= OPAL_XIVE_EQ_ESCALATE;
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}
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/* Configure and enable the queue in HW */
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for (;;) {
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rc = opal_xive_set_queue_info(vp_id, prio, qpage_phys, order, flags);
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if (rc != OPAL_BUSY)
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break;
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msleep(OPAL_BUSY_DELAY_MS);
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}
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if (rc) {
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vp_err(vp_id, "Failed to set queue %d info: %lld\n", prio, rc);
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rc = -EIO;
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} else {
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/*
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* KVM code requires all of the above to be visible before
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* q->qpage is set due to how it manages IPI EOIs
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*/
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wmb();
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q->qpage = qpage;
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}
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fail:
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return rc;
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}
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EXPORT_SYMBOL_GPL(xive_native_configure_queue);
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static void __xive_native_disable_queue(u32 vp_id, struct xive_q *q, u8 prio)
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{
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s64 rc;
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/* Disable the queue in HW */
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for (;;) {
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rc = opal_xive_set_queue_info(vp_id, prio, 0, 0, 0);
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if (rc != OPAL_BUSY)
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break;
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msleep(OPAL_BUSY_DELAY_MS);
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}
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if (rc)
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vp_err(vp_id, "Failed to disable queue %d : %lld\n", prio, rc);
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}
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void xive_native_disable_queue(u32 vp_id, struct xive_q *q, u8 prio)
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{
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__xive_native_disable_queue(vp_id, q, prio);
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}
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EXPORT_SYMBOL_GPL(xive_native_disable_queue);
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static int xive_native_setup_queue(unsigned int cpu, struct xive_cpu *xc, u8 prio)
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{
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struct xive_q *q = &xc->queue[prio];
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__be32 *qpage;
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qpage = xive_queue_page_alloc(cpu, xive_queue_shift);
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if (IS_ERR(qpage))
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return PTR_ERR(qpage);
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return xive_native_configure_queue(get_hard_smp_processor_id(cpu),
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q, prio, qpage, xive_queue_shift, false);
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}
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static void xive_native_cleanup_queue(unsigned int cpu, struct xive_cpu *xc, u8 prio)
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{
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struct xive_q *q = &xc->queue[prio];
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unsigned int alloc_order;
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/*
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* We use the variant with no iounmap as this is called on exec
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* from an IPI and iounmap isn't safe
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*/
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__xive_native_disable_queue(get_hard_smp_processor_id(cpu), q, prio);
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alloc_order = xive_alloc_order(xive_queue_shift);
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free_pages((unsigned long)q->qpage, alloc_order);
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q->qpage = NULL;
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}
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static bool xive_native_match(struct device_node *node)
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{
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return of_device_is_compatible(node, "ibm,opal-xive-vc");
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}
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static s64 opal_xive_allocate_irq(u32 chip_id)
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{
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s64 irq = opal_xive_allocate_irq_raw(chip_id);
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/*
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* Old versions of skiboot can incorrectly return 0xffffffff to
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* indicate no space, fix it up here.
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*/
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return irq == 0xffffffff ? OPAL_RESOURCE : irq;
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}
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#ifdef CONFIG_SMP
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static int xive_native_get_ipi(unsigned int cpu, struct xive_cpu *xc)
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{
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s64 irq;
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/* Allocate an IPI and populate info about it */
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for (;;) {
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irq = opal_xive_allocate_irq(xc->chip_id);
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if (irq == OPAL_BUSY) {
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msleep(OPAL_BUSY_DELAY_MS);
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continue;
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}
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if (irq < 0) {
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pr_err("Failed to allocate IPI on CPU %d\n", cpu);
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return -ENXIO;
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}
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xc->hw_ipi = irq;
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break;
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}
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return 0;
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}
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#endif /* CONFIG_SMP */
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u32 xive_native_alloc_irq_on_chip(u32 chip_id)
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{
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s64 rc;
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for (;;) {
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rc = opal_xive_allocate_irq(chip_id);
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if (rc != OPAL_BUSY)
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break;
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msleep(OPAL_BUSY_DELAY_MS);
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}
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if (rc < 0)
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return 0;
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return rc;
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}
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EXPORT_SYMBOL_GPL(xive_native_alloc_irq_on_chip);
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void xive_native_free_irq(u32 irq)
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{
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for (;;) {
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s64 rc = opal_xive_free_irq(irq);
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if (rc != OPAL_BUSY)
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break;
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msleep(OPAL_BUSY_DELAY_MS);
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}
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}
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EXPORT_SYMBOL_GPL(xive_native_free_irq);
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#ifdef CONFIG_SMP
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static void xive_native_put_ipi(unsigned int cpu, struct xive_cpu *xc)
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{
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s64 rc;
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/* Free the IPI */
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if (xc->hw_ipi == XIVE_BAD_IRQ)
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return;
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for (;;) {
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rc = opal_xive_free_irq(xc->hw_ipi);
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if (rc == OPAL_BUSY) {
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msleep(OPAL_BUSY_DELAY_MS);
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continue;
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}
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xc->hw_ipi = XIVE_BAD_IRQ;
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break;
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}
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}
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#endif /* CONFIG_SMP */
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static void xive_native_shutdown(void)
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{
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/* Switch the XIVE to emulation mode */
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opal_xive_reset(OPAL_XIVE_MODE_EMU);
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}
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/*
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* Perform an "ack" cycle on the current thread, thus
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* grabbing the pending active priorities and updating
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* the CPPR to the most favored one.
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*/
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static void xive_native_update_pending(struct xive_cpu *xc)
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{
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u8 he, cppr;
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u16 ack;
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/* Perform the acknowledge hypervisor to register cycle */
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ack = be16_to_cpu(__raw_readw(xive_tima + TM_SPC_ACK_HV_REG));
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/* Synchronize subsequent queue accesses */
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mb();
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/*
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* Grab the CPPR and the "HE" field which indicates the source
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* of the hypervisor interrupt (if any)
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*/
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cppr = ack & 0xff;
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he = (ack >> 8) >> 6;
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switch(he) {
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case TM_QW3_NSR_HE_NONE: /* Nothing to see here */
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break;
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case TM_QW3_NSR_HE_PHYS: /* Physical thread interrupt */
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if (cppr == 0xff)
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return;
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/* Mark the priority pending */
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xc->pending_prio |= 1 << cppr;
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/*
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* A new interrupt should never have a CPPR less favored
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* than our current one.
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*/
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if (cppr >= xc->cppr)
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pr_err("CPU %d odd ack CPPR, got %d at %d\n",
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smp_processor_id(), cppr, xc->cppr);
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/* Update our idea of what the CPPR is */
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xc->cppr = cppr;
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break;
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case TM_QW3_NSR_HE_POOL: /* HV Pool interrupt (unused) */
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case TM_QW3_NSR_HE_LSI: /* Legacy FW LSI (unused) */
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pr_err("CPU %d got unexpected interrupt type HE=%d\n",
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smp_processor_id(), he);
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return;
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}
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}
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static void xive_native_prepare_cpu(unsigned int cpu, struct xive_cpu *xc)
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{
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xc->chip_id = cpu_to_chip_id(cpu);
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}
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static void xive_native_setup_cpu(unsigned int cpu, struct xive_cpu *xc)
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{
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s64 rc;
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u32 vp;
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__be64 vp_cam_be;
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u64 vp_cam;
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if (xive_pool_vps == XIVE_INVALID_VP)
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return;
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/* Check if pool VP already active, if it is, pull it */
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if (in_be32(xive_tima + TM_QW2_HV_POOL + TM_WORD2) & TM_QW2W2_VP)
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in_be64(xive_tima + TM_SPC_PULL_POOL_CTX);
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/* Enable the pool VP */
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vp = xive_pool_vps + cpu;
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for (;;) {
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rc = opal_xive_set_vp_info(vp, OPAL_XIVE_VP_ENABLED, 0);
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if (rc != OPAL_BUSY)
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break;
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msleep(OPAL_BUSY_DELAY_MS);
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}
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if (rc) {
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pr_err("Failed to enable pool VP on CPU %d\n", cpu);
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return;
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}
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/* Grab it's CAM value */
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rc = opal_xive_get_vp_info(vp, NULL, &vp_cam_be, NULL, NULL);
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if (rc) {
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pr_err("Failed to get pool VP info CPU %d\n", cpu);
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return;
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}
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vp_cam = be64_to_cpu(vp_cam_be);
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/* Push it on the CPU (set LSMFB to 0xff to skip backlog scan) */
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out_be32(xive_tima + TM_QW2_HV_POOL + TM_WORD0, 0xff);
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out_be32(xive_tima + TM_QW2_HV_POOL + TM_WORD2, TM_QW2W2_VP | vp_cam);
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}
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static void xive_native_teardown_cpu(unsigned int cpu, struct xive_cpu *xc)
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{
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s64 rc;
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u32 vp;
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if (xive_pool_vps == XIVE_INVALID_VP)
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return;
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/* Pull the pool VP from the CPU */
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in_be64(xive_tima + TM_SPC_PULL_POOL_CTX);
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/* Disable it */
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vp = xive_pool_vps + cpu;
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for (;;) {
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rc = opal_xive_set_vp_info(vp, 0, 0);
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if (rc != OPAL_BUSY)
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break;
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msleep(OPAL_BUSY_DELAY_MS);
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}
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}
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void xive_native_sync_source(u32 hw_irq)
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{
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opal_xive_sync(XIVE_SYNC_EAS, hw_irq);
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}
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EXPORT_SYMBOL_GPL(xive_native_sync_source);
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void xive_native_sync_queue(u32 hw_irq)
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{
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opal_xive_sync(XIVE_SYNC_QUEUE, hw_irq);
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}
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EXPORT_SYMBOL_GPL(xive_native_sync_queue);
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#ifdef CONFIG_DEBUG_FS
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static int xive_native_debug_create(struct dentry *xive_dir)
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{
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debugfs_create_bool("save-restore", 0600, xive_dir, &xive_has_save_restore);
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return 0;
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}
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#endif
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static const struct xive_ops xive_native_ops = {
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.populate_irq_data = xive_native_populate_irq_data,
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.configure_irq = xive_native_configure_irq,
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.get_irq_config = xive_native_get_irq_config,
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.setup_queue = xive_native_setup_queue,
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.cleanup_queue = xive_native_cleanup_queue,
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.match = xive_native_match,
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.shutdown = xive_native_shutdown,
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.update_pending = xive_native_update_pending,
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.prepare_cpu = xive_native_prepare_cpu,
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.setup_cpu = xive_native_setup_cpu,
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.teardown_cpu = xive_native_teardown_cpu,
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.sync_source = xive_native_sync_source,
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#ifdef CONFIG_SMP
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.get_ipi = xive_native_get_ipi,
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.put_ipi = xive_native_put_ipi,
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#endif /* CONFIG_SMP */
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#ifdef CONFIG_DEBUG_FS
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.debug_create = xive_native_debug_create,
|
|
#endif /* CONFIG_DEBUG_FS */
|
|
.name = "native",
|
|
};
|
|
|
|
static bool __init xive_parse_provisioning(struct device_node *np)
|
|
{
|
|
int rc;
|
|
|
|
if (of_property_read_u32(np, "ibm,xive-provision-page-size",
|
|
&xive_provision_size) < 0)
|
|
return true;
|
|
rc = of_property_count_elems_of_size(np, "ibm,xive-provision-chips", 4);
|
|
if (rc < 0) {
|
|
pr_err("Error %d getting provision chips array\n", rc);
|
|
return false;
|
|
}
|
|
xive_provision_chip_count = rc;
|
|
if (rc == 0)
|
|
return true;
|
|
|
|
xive_provision_chips = kcalloc(4, xive_provision_chip_count,
|
|
GFP_KERNEL);
|
|
if (WARN_ON(!xive_provision_chips))
|
|
return false;
|
|
|
|
rc = of_property_read_u32_array(np, "ibm,xive-provision-chips",
|
|
xive_provision_chips,
|
|
xive_provision_chip_count);
|
|
if (rc < 0) {
|
|
pr_err("Error %d reading provision chips array\n", rc);
|
|
return false;
|
|
}
|
|
|
|
xive_provision_cache = kmem_cache_create("xive-provision",
|
|
xive_provision_size,
|
|
xive_provision_size,
|
|
0, NULL);
|
|
if (!xive_provision_cache) {
|
|
pr_err("Failed to allocate provision cache\n");
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static void __init xive_native_setup_pools(void)
|
|
{
|
|
/* Allocate a pool big enough */
|
|
pr_debug("XIVE: Allocating VP block for pool size %u\n", nr_cpu_ids);
|
|
|
|
xive_pool_vps = xive_native_alloc_vp_block(nr_cpu_ids);
|
|
if (WARN_ON(xive_pool_vps == XIVE_INVALID_VP))
|
|
pr_err("XIVE: Failed to allocate pool VP, KVM might not function\n");
|
|
|
|
pr_debug("XIVE: Pool VPs allocated at 0x%x for %u max CPUs\n",
|
|
xive_pool_vps, nr_cpu_ids);
|
|
}
|
|
|
|
u32 xive_native_default_eq_shift(void)
|
|
{
|
|
return xive_queue_shift;
|
|
}
|
|
EXPORT_SYMBOL_GPL(xive_native_default_eq_shift);
|
|
|
|
unsigned long xive_tima_os;
|
|
EXPORT_SYMBOL_GPL(xive_tima_os);
|
|
|
|
bool __init xive_native_init(void)
|
|
{
|
|
struct device_node *np;
|
|
struct resource r;
|
|
void __iomem *tima;
|
|
struct property *prop;
|
|
u8 max_prio = 7;
|
|
const __be32 *p;
|
|
u32 val, cpu;
|
|
s64 rc;
|
|
|
|
if (xive_cmdline_disabled)
|
|
return false;
|
|
|
|
pr_devel("xive_native_init()\n");
|
|
np = of_find_compatible_node(NULL, NULL, "ibm,opal-xive-pe");
|
|
if (!np) {
|
|
pr_devel("not found !\n");
|
|
return false;
|
|
}
|
|
pr_devel("Found %pOF\n", np);
|
|
|
|
/* Resource 1 is HV window */
|
|
if (of_address_to_resource(np, 1, &r)) {
|
|
pr_err("Failed to get thread mgmnt area resource\n");
|
|
return false;
|
|
}
|
|
tima = ioremap(r.start, resource_size(&r));
|
|
if (!tima) {
|
|
pr_err("Failed to map thread mgmnt area\n");
|
|
return false;
|
|
}
|
|
|
|
/* Read number of priorities */
|
|
if (of_property_read_u32(np, "ibm,xive-#priorities", &val) == 0)
|
|
max_prio = val - 1;
|
|
|
|
/* Iterate the EQ sizes and pick one */
|
|
of_property_for_each_u32(np, "ibm,xive-eq-sizes", prop, p, val) {
|
|
xive_queue_shift = val;
|
|
if (val == PAGE_SHIFT)
|
|
break;
|
|
}
|
|
|
|
/* Do we support single escalation */
|
|
if (of_get_property(np, "single-escalation-support", NULL) != NULL)
|
|
xive_has_single_esc = true;
|
|
|
|
if (of_get_property(np, "vp-save-restore", NULL))
|
|
xive_has_save_restore = true;
|
|
|
|
/* Configure Thread Management areas for KVM */
|
|
for_each_possible_cpu(cpu)
|
|
kvmppc_set_xive_tima(cpu, r.start, tima);
|
|
|
|
/* Resource 2 is OS window */
|
|
if (of_address_to_resource(np, 2, &r)) {
|
|
pr_err("Failed to get thread mgmnt area resource\n");
|
|
return false;
|
|
}
|
|
|
|
xive_tima_os = r.start;
|
|
|
|
/* Grab size of provisionning pages */
|
|
xive_parse_provisioning(np);
|
|
|
|
/* Switch the XIVE to exploitation mode */
|
|
rc = opal_xive_reset(OPAL_XIVE_MODE_EXPL);
|
|
if (rc) {
|
|
pr_err("Switch to exploitation mode failed with error %lld\n", rc);
|
|
return false;
|
|
}
|
|
|
|
/* Setup some dummy HV pool VPs */
|
|
xive_native_setup_pools();
|
|
|
|
/* Initialize XIVE core with our backend */
|
|
if (!xive_core_init(np, &xive_native_ops, tima, TM_QW3_HV_PHYS,
|
|
max_prio)) {
|
|
opal_xive_reset(OPAL_XIVE_MODE_EMU);
|
|
return false;
|
|
}
|
|
pr_info("Using %dkB queues\n", 1 << (xive_queue_shift - 10));
|
|
return true;
|
|
}
|
|
|
|
static bool xive_native_provision_pages(void)
|
|
{
|
|
u32 i;
|
|
void *p;
|
|
|
|
for (i = 0; i < xive_provision_chip_count; i++) {
|
|
u32 chip = xive_provision_chips[i];
|
|
|
|
/*
|
|
* XXX TODO: Try to make the allocation local to the node where
|
|
* the chip resides.
|
|
*/
|
|
p = kmem_cache_alloc(xive_provision_cache, GFP_KERNEL);
|
|
if (!p) {
|
|
pr_err("Failed to allocate provisioning page\n");
|
|
return false;
|
|
}
|
|
kmemleak_ignore(p);
|
|
opal_xive_donate_page(chip, __pa(p));
|
|
}
|
|
return true;
|
|
}
|
|
|
|
u32 xive_native_alloc_vp_block(u32 max_vcpus)
|
|
{
|
|
s64 rc;
|
|
u32 order;
|
|
|
|
order = fls(max_vcpus) - 1;
|
|
if (max_vcpus > (1 << order))
|
|
order++;
|
|
|
|
pr_debug("VP block alloc, for max VCPUs %d use order %d\n",
|
|
max_vcpus, order);
|
|
|
|
for (;;) {
|
|
rc = opal_xive_alloc_vp_block(order);
|
|
switch (rc) {
|
|
case OPAL_BUSY:
|
|
msleep(OPAL_BUSY_DELAY_MS);
|
|
break;
|
|
case OPAL_XIVE_PROVISIONING:
|
|
if (!xive_native_provision_pages())
|
|
return XIVE_INVALID_VP;
|
|
break;
|
|
default:
|
|
if (rc < 0) {
|
|
pr_err("OPAL failed to allocate VCPUs order %d, err %lld\n",
|
|
order, rc);
|
|
return XIVE_INVALID_VP;
|
|
}
|
|
return rc;
|
|
}
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(xive_native_alloc_vp_block);
|
|
|
|
void xive_native_free_vp_block(u32 vp_base)
|
|
{
|
|
s64 rc;
|
|
|
|
if (vp_base == XIVE_INVALID_VP)
|
|
return;
|
|
|
|
rc = opal_xive_free_vp_block(vp_base);
|
|
if (rc < 0)
|
|
pr_warn("OPAL error %lld freeing VP block\n", rc);
|
|
}
|
|
EXPORT_SYMBOL_GPL(xive_native_free_vp_block);
|
|
|
|
int xive_native_enable_vp(u32 vp_id, bool single_escalation)
|
|
{
|
|
s64 rc;
|
|
u64 flags = OPAL_XIVE_VP_ENABLED;
|
|
|
|
if (single_escalation)
|
|
flags |= OPAL_XIVE_VP_SINGLE_ESCALATION;
|
|
for (;;) {
|
|
rc = opal_xive_set_vp_info(vp_id, flags, 0);
|
|
if (rc != OPAL_BUSY)
|
|
break;
|
|
msleep(OPAL_BUSY_DELAY_MS);
|
|
}
|
|
if (rc)
|
|
vp_err(vp_id, "Failed to enable VP : %lld\n", rc);
|
|
return rc ? -EIO : 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(xive_native_enable_vp);
|
|
|
|
int xive_native_disable_vp(u32 vp_id)
|
|
{
|
|
s64 rc;
|
|
|
|
for (;;) {
|
|
rc = opal_xive_set_vp_info(vp_id, 0, 0);
|
|
if (rc != OPAL_BUSY)
|
|
break;
|
|
msleep(OPAL_BUSY_DELAY_MS);
|
|
}
|
|
if (rc)
|
|
vp_err(vp_id, "Failed to disable VP : %lld\n", rc);
|
|
return rc ? -EIO : 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(xive_native_disable_vp);
|
|
|
|
int xive_native_get_vp_info(u32 vp_id, u32 *out_cam_id, u32 *out_chip_id)
|
|
{
|
|
__be64 vp_cam_be;
|
|
__be32 vp_chip_id_be;
|
|
s64 rc;
|
|
|
|
rc = opal_xive_get_vp_info(vp_id, NULL, &vp_cam_be, NULL, &vp_chip_id_be);
|
|
if (rc) {
|
|
vp_err(vp_id, "Failed to get VP info : %lld\n", rc);
|
|
return -EIO;
|
|
}
|
|
*out_cam_id = be64_to_cpu(vp_cam_be) & 0xffffffffu;
|
|
*out_chip_id = be32_to_cpu(vp_chip_id_be);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(xive_native_get_vp_info);
|
|
|
|
bool xive_native_has_single_escalation(void)
|
|
{
|
|
return xive_has_single_esc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(xive_native_has_single_escalation);
|
|
|
|
bool xive_native_has_save_restore(void)
|
|
{
|
|
return xive_has_save_restore;
|
|
}
|
|
EXPORT_SYMBOL_GPL(xive_native_has_save_restore);
|
|
|
|
int xive_native_get_queue_info(u32 vp_id, u32 prio,
|
|
u64 *out_qpage,
|
|
u64 *out_qsize,
|
|
u64 *out_qeoi_page,
|
|
u32 *out_escalate_irq,
|
|
u64 *out_qflags)
|
|
{
|
|
__be64 qpage;
|
|
__be64 qsize;
|
|
__be64 qeoi_page;
|
|
__be32 escalate_irq;
|
|
__be64 qflags;
|
|
s64 rc;
|
|
|
|
rc = opal_xive_get_queue_info(vp_id, prio, &qpage, &qsize,
|
|
&qeoi_page, &escalate_irq, &qflags);
|
|
if (rc) {
|
|
vp_err(vp_id, "failed to get queue %d info : %lld\n", prio, rc);
|
|
return -EIO;
|
|
}
|
|
|
|
if (out_qpage)
|
|
*out_qpage = be64_to_cpu(qpage);
|
|
if (out_qsize)
|
|
*out_qsize = be32_to_cpu(qsize);
|
|
if (out_qeoi_page)
|
|
*out_qeoi_page = be64_to_cpu(qeoi_page);
|
|
if (out_escalate_irq)
|
|
*out_escalate_irq = be32_to_cpu(escalate_irq);
|
|
if (out_qflags)
|
|
*out_qflags = be64_to_cpu(qflags);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(xive_native_get_queue_info);
|
|
|
|
int xive_native_get_queue_state(u32 vp_id, u32 prio, u32 *qtoggle, u32 *qindex)
|
|
{
|
|
__be32 opal_qtoggle;
|
|
__be32 opal_qindex;
|
|
s64 rc;
|
|
|
|
rc = opal_xive_get_queue_state(vp_id, prio, &opal_qtoggle,
|
|
&opal_qindex);
|
|
if (rc) {
|
|
vp_err(vp_id, "failed to get queue %d state : %lld\n", prio, rc);
|
|
return -EIO;
|
|
}
|
|
|
|
if (qtoggle)
|
|
*qtoggle = be32_to_cpu(opal_qtoggle);
|
|
if (qindex)
|
|
*qindex = be32_to_cpu(opal_qindex);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(xive_native_get_queue_state);
|
|
|
|
int xive_native_set_queue_state(u32 vp_id, u32 prio, u32 qtoggle, u32 qindex)
|
|
{
|
|
s64 rc;
|
|
|
|
rc = opal_xive_set_queue_state(vp_id, prio, qtoggle, qindex);
|
|
if (rc) {
|
|
vp_err(vp_id, "failed to set queue %d state : %lld\n", prio, rc);
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(xive_native_set_queue_state);
|
|
|
|
bool xive_native_has_queue_state_support(void)
|
|
{
|
|
return opal_check_token(OPAL_XIVE_GET_QUEUE_STATE) &&
|
|
opal_check_token(OPAL_XIVE_SET_QUEUE_STATE);
|
|
}
|
|
EXPORT_SYMBOL_GPL(xive_native_has_queue_state_support);
|
|
|
|
int xive_native_get_vp_state(u32 vp_id, u64 *out_state)
|
|
{
|
|
__be64 state;
|
|
s64 rc;
|
|
|
|
rc = opal_xive_get_vp_state(vp_id, &state);
|
|
if (rc) {
|
|
vp_err(vp_id, "failed to get vp state : %lld\n", rc);
|
|
return -EIO;
|
|
}
|
|
|
|
if (out_state)
|
|
*out_state = be64_to_cpu(state);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(xive_native_get_vp_state);
|
|
|
|
machine_arch_initcall(powernv, xive_core_debug_init);
|