drivers/gpu/drm/lima/lima_dlbu.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/lima/lima_dlbu.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/lima/lima_dlbu.c
Extension
.c
Size
1559 bytes
Lines
74
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0 OR MIT
/* Copyright 2018-2019 Qiang Yu <yuq825@gmail.com> */

#include <linux/io.h>
#include <linux/device.h>

#include "lima_device.h"
#include "lima_dlbu.h"
#include "lima_vm.h"
#include "lima_regs.h"

#define dlbu_write(reg, data) writel(data, ip->iomem + reg)
#define dlbu_read(reg) readl(ip->iomem + reg)

void lima_dlbu_enable(struct lima_device *dev, int num_pp)
{
	struct lima_sched_pipe *pipe = dev->pipe + lima_pipe_pp;
	struct lima_ip *ip = dev->ip + lima_ip_dlbu;
	int i, mask = 0;

	for (i = 0; i < num_pp; i++) {
		struct lima_ip *pp = pipe->processor[i];

		mask |= 1 << (pp->id - lima_ip_pp0);
	}

	dlbu_write(LIMA_DLBU_PP_ENABLE_MASK, mask);
}

void lima_dlbu_disable(struct lima_device *dev)
{
	struct lima_ip *ip = dev->ip + lima_ip_dlbu;

	dlbu_write(LIMA_DLBU_PP_ENABLE_MASK, 0);
}

void lima_dlbu_set_reg(struct lima_ip *ip, u32 *reg)
{
	dlbu_write(LIMA_DLBU_TLLIST_VBASEADDR, reg[0]);
	dlbu_write(LIMA_DLBU_FB_DIM, reg[1]);
	dlbu_write(LIMA_DLBU_TLLIST_CONF, reg[2]);
	dlbu_write(LIMA_DLBU_START_TILE_POS, reg[3]);
}

static int lima_dlbu_hw_init(struct lima_ip *ip)
{
	struct lima_device *dev = ip->dev;

	dlbu_write(LIMA_DLBU_MASTER_TLLIST_PHYS_ADDR, dev->dlbu_dma | 1);
	dlbu_write(LIMA_DLBU_MASTER_TLLIST_VADDR, LIMA_VA_RESERVE_DLBU);

	return 0;
}

int lima_dlbu_resume(struct lima_ip *ip)
{
	return lima_dlbu_hw_init(ip);
}

void lima_dlbu_suspend(struct lima_ip *ip)
{

}

int lima_dlbu_init(struct lima_ip *ip)
{
	return lima_dlbu_hw_init(ip);
}

void lima_dlbu_fini(struct lima_ip *ip)
{

}

Annotation

Implementation Notes