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https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-06 02:24:14 +08:00
ca2030d56b
In order to remove the dependency on the simple-bus compatible string, which causes the OF driver core to register all child devices, make the host1x driver explicitly register its children. Signed-off-by: Thierry Reding <treding@nvidia.com>
567 lines
13 KiB
C
567 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Tegra host1x driver
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*
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* Copyright (c) 2010-2013, NVIDIA Corporation.
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*/
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#include <linux/clk.h>
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#include <linux/dma-mapping.h>
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#include <linux/io.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/of.h>
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#include <linux/slab.h>
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#define CREATE_TRACE_POINTS
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#include <trace/events/host1x.h>
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#undef CREATE_TRACE_POINTS
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#include "bus.h"
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#include "channel.h"
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#include "debug.h"
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#include "dev.h"
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#include "intr.h"
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#include "hw/host1x01.h"
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#include "hw/host1x02.h"
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#include "hw/host1x04.h"
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#include "hw/host1x05.h"
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#include "hw/host1x06.h"
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#include "hw/host1x07.h"
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void host1x_hypervisor_writel(struct host1x *host1x, u32 v, u32 r)
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{
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writel(v, host1x->hv_regs + r);
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}
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u32 host1x_hypervisor_readl(struct host1x *host1x, u32 r)
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{
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return readl(host1x->hv_regs + r);
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}
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void host1x_sync_writel(struct host1x *host1x, u32 v, u32 r)
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{
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void __iomem *sync_regs = host1x->regs + host1x->info->sync_offset;
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writel(v, sync_regs + r);
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}
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u32 host1x_sync_readl(struct host1x *host1x, u32 r)
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{
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void __iomem *sync_regs = host1x->regs + host1x->info->sync_offset;
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return readl(sync_regs + r);
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}
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void host1x_ch_writel(struct host1x_channel *ch, u32 v, u32 r)
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{
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writel(v, ch->regs + r);
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}
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u32 host1x_ch_readl(struct host1x_channel *ch, u32 r)
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{
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return readl(ch->regs + r);
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}
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static const struct host1x_info host1x01_info = {
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.nb_channels = 8,
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.nb_pts = 32,
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.nb_mlocks = 16,
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.nb_bases = 8,
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.init = host1x01_init,
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.sync_offset = 0x3000,
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.dma_mask = DMA_BIT_MASK(32),
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.has_wide_gather = false,
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.has_hypervisor = false,
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.num_sid_entries = 0,
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.sid_table = NULL,
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};
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static const struct host1x_info host1x02_info = {
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.nb_channels = 9,
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.nb_pts = 32,
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.nb_mlocks = 16,
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.nb_bases = 12,
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.init = host1x02_init,
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.sync_offset = 0x3000,
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.dma_mask = DMA_BIT_MASK(32),
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.has_wide_gather = false,
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.has_hypervisor = false,
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.num_sid_entries = 0,
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.sid_table = NULL,
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};
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static const struct host1x_info host1x04_info = {
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.nb_channels = 12,
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.nb_pts = 192,
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.nb_mlocks = 16,
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.nb_bases = 64,
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.init = host1x04_init,
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.sync_offset = 0x2100,
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.dma_mask = DMA_BIT_MASK(34),
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.has_wide_gather = false,
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.has_hypervisor = false,
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.num_sid_entries = 0,
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.sid_table = NULL,
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};
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static const struct host1x_info host1x05_info = {
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.nb_channels = 14,
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.nb_pts = 192,
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.nb_mlocks = 16,
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.nb_bases = 64,
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.init = host1x05_init,
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.sync_offset = 0x2100,
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.dma_mask = DMA_BIT_MASK(34),
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.has_wide_gather = false,
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.has_hypervisor = false,
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.num_sid_entries = 0,
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.sid_table = NULL,
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};
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static const struct host1x_sid_entry tegra186_sid_table[] = {
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{
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/* VIC */
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.base = 0x1af0,
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.offset = 0x30,
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.limit = 0x34
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},
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};
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static const struct host1x_info host1x06_info = {
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.nb_channels = 63,
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.nb_pts = 576,
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.nb_mlocks = 24,
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.nb_bases = 16,
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.init = host1x06_init,
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.sync_offset = 0x0,
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.dma_mask = DMA_BIT_MASK(40),
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.has_wide_gather = true,
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.has_hypervisor = true,
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.num_sid_entries = ARRAY_SIZE(tegra186_sid_table),
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.sid_table = tegra186_sid_table,
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};
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static const struct host1x_sid_entry tegra194_sid_table[] = {
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{
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/* VIC */
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.base = 0x1af0,
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.offset = 0x30,
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.limit = 0x34
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},
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};
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static const struct host1x_info host1x07_info = {
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.nb_channels = 63,
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.nb_pts = 704,
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.nb_mlocks = 32,
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.nb_bases = 0,
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.init = host1x07_init,
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.sync_offset = 0x0,
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.dma_mask = DMA_BIT_MASK(40),
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.has_wide_gather = true,
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.has_hypervisor = true,
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.num_sid_entries = ARRAY_SIZE(tegra194_sid_table),
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.sid_table = tegra194_sid_table,
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};
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static const struct of_device_id host1x_of_match[] = {
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{ .compatible = "nvidia,tegra194-host1x", .data = &host1x07_info, },
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{ .compatible = "nvidia,tegra186-host1x", .data = &host1x06_info, },
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{ .compatible = "nvidia,tegra210-host1x", .data = &host1x05_info, },
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{ .compatible = "nvidia,tegra124-host1x", .data = &host1x04_info, },
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{ .compatible = "nvidia,tegra114-host1x", .data = &host1x02_info, },
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{ .compatible = "nvidia,tegra30-host1x", .data = &host1x01_info, },
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{ .compatible = "nvidia,tegra20-host1x", .data = &host1x01_info, },
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{ },
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};
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MODULE_DEVICE_TABLE(of, host1x_of_match);
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static void host1x_setup_sid_table(struct host1x *host)
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{
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const struct host1x_info *info = host->info;
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unsigned int i;
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for (i = 0; i < info->num_sid_entries; i++) {
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const struct host1x_sid_entry *entry = &info->sid_table[i];
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host1x_hypervisor_writel(host, entry->offset, entry->base);
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host1x_hypervisor_writel(host, entry->limit, entry->base + 4);
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}
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}
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static bool host1x_wants_iommu(struct host1x *host1x)
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{
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/*
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* If we support addressing a maximum of 32 bits of physical memory
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* and if the host1x firewall is enabled, there's no need to enable
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* IOMMU support. This can happen for example on Tegra20, Tegra30
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* and Tegra114.
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*
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* Tegra124 and later can address up to 34 bits of physical memory and
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* many platforms come equipped with more than 2 GiB of system memory,
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* which requires crossing the 4 GiB boundary. But there's a catch: on
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* SoCs before Tegra186 (i.e. Tegra124 and Tegra210), the host1x can
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* only address up to 32 bits of memory in GATHER opcodes, which means
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* that command buffers need to either be in the first 2 GiB of system
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* memory (which could quickly lead to memory exhaustion), or command
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* buffers need to be treated differently from other buffers (which is
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* not possible with the current ABI).
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*
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* A third option is to use the IOMMU in these cases to make sure all
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* buffers will be mapped into a 32-bit IOVA space that host1x can
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* address. This allows all of the system memory to be used and works
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* within the limitations of the host1x on these SoCs.
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*
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* In summary, default to enable IOMMU on Tegra124 and later. For any
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* of the earlier SoCs, only use the IOMMU for additional safety when
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* the host1x firewall is disabled.
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*/
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if (host1x->info->dma_mask <= DMA_BIT_MASK(32)) {
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if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL))
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return false;
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}
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return true;
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}
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static struct iommu_domain *host1x_iommu_attach(struct host1x *host)
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{
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struct iommu_domain *domain = iommu_get_domain_for_dev(host->dev);
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int err;
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/*
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* We may not always want to enable IOMMU support (for example if the
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* host1x firewall is already enabled and we don't support addressing
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* more than 32 bits of physical memory), so check for that first.
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*
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* Similarly, if host1x is already attached to an IOMMU (via the DMA
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* API), don't try to attach again.
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*/
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if (!host1x_wants_iommu(host) || domain)
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return domain;
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host->group = iommu_group_get(host->dev);
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if (host->group) {
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struct iommu_domain_geometry *geometry;
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dma_addr_t start, end;
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unsigned long order;
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err = iova_cache_get();
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if (err < 0)
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goto put_group;
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host->domain = iommu_domain_alloc(&platform_bus_type);
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if (!host->domain) {
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err = -ENOMEM;
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goto put_cache;
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}
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err = iommu_attach_group(host->domain, host->group);
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if (err) {
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if (err == -ENODEV)
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err = 0;
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goto free_domain;
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}
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geometry = &host->domain->geometry;
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start = geometry->aperture_start & host->info->dma_mask;
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end = geometry->aperture_end & host->info->dma_mask;
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order = __ffs(host->domain->pgsize_bitmap);
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init_iova_domain(&host->iova, 1UL << order, start >> order);
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host->iova_end = end;
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domain = host->domain;
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}
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return domain;
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free_domain:
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iommu_domain_free(host->domain);
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host->domain = NULL;
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put_cache:
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iova_cache_put();
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put_group:
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iommu_group_put(host->group);
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host->group = NULL;
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return ERR_PTR(err);
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}
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static int host1x_iommu_init(struct host1x *host)
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{
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u64 mask = host->info->dma_mask;
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struct iommu_domain *domain;
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int err;
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domain = host1x_iommu_attach(host);
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if (IS_ERR(domain)) {
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err = PTR_ERR(domain);
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dev_err(host->dev, "failed to attach to IOMMU: %d\n", err);
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return err;
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}
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/*
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* If we're not behind an IOMMU make sure we don't get push buffers
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* that are allocated outside of the range addressable by the GATHER
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* opcode.
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*
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* Newer generations of Tegra (Tegra186 and later) support a wide
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* variant of the GATHER opcode that allows addressing more bits.
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*/
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if (!domain && !host->info->has_wide_gather)
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mask = DMA_BIT_MASK(32);
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err = dma_coerce_mask_and_coherent(host->dev, mask);
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if (err < 0) {
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dev_err(host->dev, "failed to set DMA mask: %d\n", err);
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return err;
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}
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return 0;
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}
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static void host1x_iommu_exit(struct host1x *host)
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{
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if (host->domain) {
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put_iova_domain(&host->iova);
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iommu_detach_group(host->domain, host->group);
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iommu_domain_free(host->domain);
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host->domain = NULL;
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iova_cache_put();
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iommu_group_put(host->group);
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host->group = NULL;
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}
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}
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static int host1x_probe(struct platform_device *pdev)
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{
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struct host1x *host;
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struct resource *regs, *hv_regs = NULL;
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int syncpt_irq;
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int err;
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host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);
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if (!host)
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return -ENOMEM;
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host->info = of_device_get_match_data(&pdev->dev);
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if (host->info->has_hypervisor) {
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regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vm");
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if (!regs) {
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dev_err(&pdev->dev, "failed to get vm registers\n");
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return -ENXIO;
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}
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hv_regs = platform_get_resource_byname(pdev, IORESOURCE_MEM,
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"hypervisor");
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if (!hv_regs) {
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dev_err(&pdev->dev,
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"failed to get hypervisor registers\n");
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return -ENXIO;
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}
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} else {
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regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!regs) {
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dev_err(&pdev->dev, "failed to get registers\n");
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return -ENXIO;
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}
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}
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syncpt_irq = platform_get_irq(pdev, 0);
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if (syncpt_irq < 0)
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return syncpt_irq;
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mutex_init(&host->devices_lock);
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INIT_LIST_HEAD(&host->devices);
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INIT_LIST_HEAD(&host->list);
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host->dev = &pdev->dev;
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/* set common host1x device data */
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platform_set_drvdata(pdev, host);
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host->regs = devm_ioremap_resource(&pdev->dev, regs);
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if (IS_ERR(host->regs))
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return PTR_ERR(host->regs);
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if (host->info->has_hypervisor) {
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host->hv_regs = devm_ioremap_resource(&pdev->dev, hv_regs);
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if (IS_ERR(host->hv_regs))
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return PTR_ERR(host->hv_regs);
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}
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host->dev->dma_parms = &host->dma_parms;
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dma_set_max_seg_size(host->dev, UINT_MAX);
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if (host->info->init) {
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err = host->info->init(host);
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if (err)
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return err;
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}
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host->clk = devm_clk_get(&pdev->dev, NULL);
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if (IS_ERR(host->clk)) {
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err = PTR_ERR(host->clk);
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if (err != -EPROBE_DEFER)
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dev_err(&pdev->dev, "failed to get clock: %d\n", err);
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return err;
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}
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host->rst = devm_reset_control_get(&pdev->dev, "host1x");
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if (IS_ERR(host->rst)) {
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err = PTR_ERR(host->rst);
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dev_err(&pdev->dev, "failed to get reset: %d\n", err);
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return err;
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}
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err = host1x_iommu_init(host);
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if (err < 0) {
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dev_err(&pdev->dev, "failed to setup IOMMU: %d\n", err);
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return err;
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}
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err = host1x_channel_list_init(&host->channel_list,
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host->info->nb_channels);
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if (err) {
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dev_err(&pdev->dev, "failed to initialize channel list\n");
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goto iommu_exit;
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}
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err = clk_prepare_enable(host->clk);
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if (err < 0) {
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dev_err(&pdev->dev, "failed to enable clock\n");
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goto free_channels;
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}
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err = reset_control_deassert(host->rst);
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if (err < 0) {
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dev_err(&pdev->dev, "failed to deassert reset: %d\n", err);
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goto unprepare_disable;
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}
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err = host1x_syncpt_init(host);
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if (err) {
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dev_err(&pdev->dev, "failed to initialize syncpts\n");
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goto reset_assert;
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}
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err = host1x_intr_init(host, syncpt_irq);
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if (err) {
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dev_err(&pdev->dev, "failed to initialize interrupts\n");
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goto deinit_syncpt;
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}
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host1x_debug_init(host);
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if (host->info->has_hypervisor)
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host1x_setup_sid_table(host);
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err = host1x_register(host);
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if (err < 0)
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goto deinit_debugfs;
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err = devm_of_platform_populate(&pdev->dev);
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if (err < 0)
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goto unregister;
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return 0;
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unregister:
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host1x_unregister(host);
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deinit_debugfs:
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host1x_debug_deinit(host);
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host1x_intr_deinit(host);
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deinit_syncpt:
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host1x_syncpt_deinit(host);
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reset_assert:
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reset_control_assert(host->rst);
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unprepare_disable:
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clk_disable_unprepare(host->clk);
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free_channels:
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host1x_channel_list_free(&host->channel_list);
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iommu_exit:
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host1x_iommu_exit(host);
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return err;
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}
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static int host1x_remove(struct platform_device *pdev)
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{
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struct host1x *host = platform_get_drvdata(pdev);
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host1x_unregister(host);
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host1x_debug_deinit(host);
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host1x_intr_deinit(host);
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host1x_syncpt_deinit(host);
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reset_control_assert(host->rst);
|
|
clk_disable_unprepare(host->clk);
|
|
host1x_iommu_exit(host);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver tegra_host1x_driver = {
|
|
.driver = {
|
|
.name = "tegra-host1x",
|
|
.of_match_table = host1x_of_match,
|
|
},
|
|
.probe = host1x_probe,
|
|
.remove = host1x_remove,
|
|
};
|
|
|
|
static struct platform_driver * const drivers[] = {
|
|
&tegra_host1x_driver,
|
|
&tegra_mipi_driver,
|
|
};
|
|
|
|
static int __init tegra_host1x_init(void)
|
|
{
|
|
int err;
|
|
|
|
err = bus_register(&host1x_bus_type);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = platform_register_drivers(drivers, ARRAY_SIZE(drivers));
|
|
if (err < 0)
|
|
bus_unregister(&host1x_bus_type);
|
|
|
|
return err;
|
|
}
|
|
module_init(tegra_host1x_init);
|
|
|
|
static void __exit tegra_host1x_exit(void)
|
|
{
|
|
platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
|
|
bus_unregister(&host1x_bus_type);
|
|
}
|
|
module_exit(tegra_host1x_exit);
|
|
|
|
/**
|
|
* host1x_get_dma_mask() - query the supported DMA mask for host1x
|
|
* @host1x: host1x instance
|
|
*
|
|
* Note that this returns the supported DMA mask for host1x, which can be
|
|
* different from the applicable DMA mask under certain circumstances.
|
|
*/
|
|
u64 host1x_get_dma_mask(struct host1x *host1x)
|
|
{
|
|
return host1x->info->dma_mask;
|
|
}
|
|
EXPORT_SYMBOL(host1x_get_dma_mask);
|
|
|
|
MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
|
|
MODULE_AUTHOR("Terje Bergstrom <tbergstrom@nvidia.com>");
|
|
MODULE_DESCRIPTION("Host1x driver for Tegra products");
|
|
MODULE_LICENSE("GPL");
|