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This is needed because we want to reset those devices in device-agnostic code such as lima_sched. In particular, masking irqs will be useful before a hard reset to prevent race conditions. Signed-off-by: Erico Nunes <nunes.erico@gmail.com> Signed-off-by: Qiang Yu <yuq825@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240405152951.1531555-2-nunes.erico@gmail.com
74 lines
1.5 KiB
C
74 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR MIT
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/* Copyright 2018-2019 Qiang Yu <yuq825@gmail.com> */
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#include <linux/io.h>
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#include <linux/device.h>
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#include "lima_device.h"
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#include "lima_bcast.h"
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#include "lima_regs.h"
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#define bcast_write(reg, data) writel(data, ip->iomem + reg)
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#define bcast_read(reg) readl(ip->iomem + reg)
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void lima_bcast_enable(struct lima_device *dev, int num_pp)
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{
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struct lima_sched_pipe *pipe = dev->pipe + lima_pipe_pp;
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struct lima_ip *ip = dev->ip + lima_ip_bcast;
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int i, mask = bcast_read(LIMA_BCAST_BROADCAST_MASK) & 0xffff0000;
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for (i = 0; i < num_pp; i++) {
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struct lima_ip *pp = pipe->processor[i];
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mask |= 1 << (pp->id - lima_ip_pp0);
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}
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bcast_write(LIMA_BCAST_BROADCAST_MASK, mask);
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}
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static int lima_bcast_hw_init(struct lima_ip *ip)
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{
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bcast_write(LIMA_BCAST_BROADCAST_MASK, ip->data.mask << 16);
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bcast_write(LIMA_BCAST_INTERRUPT_MASK, ip->data.mask);
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return 0;
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}
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int lima_bcast_resume(struct lima_ip *ip)
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{
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return lima_bcast_hw_init(ip);
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}
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void lima_bcast_suspend(struct lima_ip *ip)
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{
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}
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int lima_bcast_mask_irq(struct lima_ip *ip)
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{
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bcast_write(LIMA_BCAST_BROADCAST_MASK, 0);
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bcast_write(LIMA_BCAST_INTERRUPT_MASK, 0);
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return 0;
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}
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int lima_bcast_reset(struct lima_ip *ip)
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{
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return lima_bcast_hw_init(ip);
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}
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int lima_bcast_init(struct lima_ip *ip)
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{
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int i;
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for (i = lima_ip_pp0; i <= lima_ip_pp7; i++) {
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if (ip->dev->ip[i].present)
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ip->data.mask |= 1 << (i - lima_ip_pp0);
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}
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return lima_bcast_hw_init(ip);
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}
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void lima_bcast_fini(struct lima_ip *ip)
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{
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}
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