/*
* Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/pm_runtime.h>
#include "pci.h"
#include "nvgpu_common.h"
#include "gk20a/gk20a.h"
#include "gk20a/platform_gk20a.h"
#include "clk/clk.h"
#define PCI_INTERFACE_NAME "card-%s%%s"
static int nvgpu_pci_tegra_probe(struct device *dev)
{
return 0;
}
static int nvgpu_pci_tegra_remove(struct device *dev)
{
return 0;
}
static bool nvgpu_pci_tegra_is_railgated(struct device *pdev)
{
return false;
}
static long nvgpu_pci_clk_round_rate(struct device *dev, unsigned long rate)
{
long ret = (long)rate;
if (rate == UINT_MAX)
ret = BOOT_GPC2CLK_MHZ * 1000000UL;
return ret;
}
static struct gk20a_platform nvgpu_pci_device[] = {
{ /* DEVICE=0x1c35 */
/* ptimer src frequency in hz */
.ptimer_src_freq = 31250000,
.probe = nvgpu_pci_tegra_probe,
.remove = nvgpu_pci_tegra_remove,
/* power management configuration */
.railgate_delay = 500,
.can_railgate = false,
.can_elpg = false,
.enable_elcg = false,
.enable_slcg = true,
.enable_blcg = true,
.disable_aspm = true,
/* power management callbacks */
.is_railgated = nvgpu_pci_tegra_is_railgated,
.clk_round_rate = nvgpu_pci_clk_round_rate,
.default_big_page_size = SZ_64K,
.ch_wdt_timeout_ms = 7000,
.has_ce = true,
.vidmem_is_vidmem = true,
.vbios_min_version = 0x86063000,
},
{ /* DEVICE=0x1c36 */
/* ptimer src frequency in hz */
.ptimer_src_freq = 31250000,
.probe = nvgpu_pci_tegra_probe,
.remove = nvgpu_pci_tegra_remove,
/* power management configuration */
.railgate_delay = 500,
.can_railgate = false,
.can_elpg = false,
.enable_elcg = false,
.enable_slcg = true,
.enable_blcg = true,
.disable_aspm = true,
/* power management callbacks */
.is_railgated = nvgpu_pci_tegra_is_railgated,
.clk_round_rate = nvgpu_pci_clk_round_rate,
.default_big_page_size = SZ_64K,
.ch_wdt_timeout_ms = 7000,
.has_ce = true,
.vidmem_is_vidmem = true,
.vbios_min_version = 0x86062d00,
},
{ /* DEVICE=0x1c37 */
/* ptimer src frequency in hz */
.ptimer_src_freq = 31250000,
.probe = nvgpu_pci_tegra_probe,
.remove = nvgpu_pci_tegra_remove,
/* power management configuration */
.railgate_delay = 500,
.can_railgate = false,
.can_elpg = false,
.enable_elcg = false,
.enable_slcg = true,
.enable_blcg = true,
.disable_aspm = true,
/* power management callbacks */
.is_railgated = nvgpu_pci_tegra_is_railgated,
.clk_round_rate = nvgpu_pci_clk_round_rate,
.default_big_page_size = SZ_64K,
.ch_wdt_timeout_ms = 7000,
.has_ce = true,
.vidmem_is_vidmem = true,
.vbios_min_version = 0x86063000,
}
};
static struct pci_device_id nvgpu_pci_table[] = {
{
PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, 0x1c35),
.class = PCI_BASE_CLASS_DISPLAY << 16,
.class_mask = 0xff << 16,
.driver_data = 0,
},
{
PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, 0x1c36),
.class = PCI_BASE_CLASS_DISPLAY << 16,
.class_mask = 0xff << 16,
.driver_data = 1,
},
{
PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, 0x1c37),
.class = PCI_BASE_CLASS_DISPLAY << 16,
.class_mask = 0xff << 16,
.driver_data = 2,
},
{}
};
static irqreturn_t nvgpu_pci_isr(int irq, void *dev_id)
{
struct gk20a *g = dev_id;
irqreturn_t ret_stall;
irqreturn_t ret_nonstall;
ret_stall = g->ops.mc.isr_stall(g);
ret_nonstall = g->ops.mc.isr_nonstall(g);
return (ret_stall == IRQ_NONE && ret_nonstall == IRQ_NONE) ?
IRQ_NONE : IRQ_WAKE_THREAD;
}
static irqreturn_t nvgpu_pci_intr_thread(int irq, void *dev_id)
{
struct gk20a *g = dev_id;
g->ops.mc.isr_thread_stall(g);
g->ops.mc.isr_thread_nonstall(g);
return IRQ_HANDLED;
}
static int nvgpu_pci_init_support(struct pci_dev *pdev)
{
int err = 0;
struct gk20a *g = get_gk20a(&pdev->dev);
g->regs = ioremap(pci_resource_start(pdev, 0),
pci_resource_len(pdev, 0));
if (IS_ERR(g->regs)) {
gk20a_err(dev_from_gk20a(g), "failed to remap gk20a registers");
err = PTR_ERR(g->regs);
goto fail;
}
g->bar1 = ioremap(pci_resource_start(pdev, 1),
pci_resource_len(pdev, 1));
if (IS_ERR(g->bar1)) {
gk20a_err(dev_from_gk20a(g), "failed to remap gk20a bar1");
err = PTR_ERR(g->bar1);
goto fail;
}
return 0;
fail:
return err;
}
static char *nvgpu_pci_devnode(struct device *dev, umode_t *mode)
{
if (mode)
*mode = S_IRUGO | S_IWUGO;
return kasprintf(GFP_KERNEL, "nvgpu-pci/%s", dev_name(dev));
}
static struct class nvgpu_pci_class = {
.owner = THIS_MODULE,
.name = "nvidia-pci-gpu",
.devnode = nvgpu_pci_devnode,
};
#ifdef CONFIG_PM
static int nvgpu_pci_pm_runtime_resume(struct device *dev)
{
return gk20a_pm_finalize_poweron(dev);
}
static int nvgpu_pci_pm_runtime_suspend(struct device *dev)
{
return 0;
}
static const struct dev_pm_ops nvgpu_pci_pm_ops = {
.runtime_resume = nvgpu_pci_pm_runtime_resume,
.runtime_suspend = nvgpu_pci_pm_runtime_suspend,
.resume = nvgpu_pci_pm_runtime_resume,
.suspend = nvgpu_pci_pm_runtime_suspend,
};
#endif
static int nvgpu_pci_pm_init(struct device *dev)
{
#ifdef CONFIG_PM
struct gk20a_platform *platform = gk20a_get_platform(dev);
if (!platform->can_railgate) {
pm_runtime_disable(dev);
} else {
if (platform->railgate_delay)
pm_runtime_set_autosuspend_delay(dev,
platform->railgate_delay);
/*
* Runtime PM for PCI devices is disabled by default,
* so we need to enable it first
*/
pm_runtime_use_autosuspend(dev);
pm_runtime_put_noidle(dev);
pm_runtime_allow(dev);
}
#endif
return 0;
}
static int nvgpu_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *pent)
{
struct gk20a_platform *platform = NULL;
struct gk20a *g;
int err;
char *nodefmt;
/* make sure driver_data is a sane index */
if (pent->driver_data >= sizeof(nvgpu_pci_device) /
sizeof(nvgpu_pci_device[0])) {
return -EINVAL;
}
platform = &nvgpu_pci_device[pent->driver_data];
pci_set_drvdata(pdev, platform);
g = kzalloc(sizeof(struct gk20a), GFP_KERNEL);
if (!g) {
gk20a_err(&pdev->dev, "couldn't allocate gk20a support");
return -ENOMEM;
}
platform->g = g;
g->dev = &pdev->dev;
err = pci_enable_device(pdev);
if (err)
return err;
pci_set_master(pdev);
g->pci_vendor_id = pdev->vendor;
g->pci_device_id = pdev->device;
g->pci_subsystem_vendor_id = pdev->subsystem_vendor;
g->pci_subsystem_device_id = pdev->subsystem_device;
g->pci_class = (pdev->class >> 8) & 0xFFFFU; // we only want base/sub
g->pci_revision = pdev->revision;
g->irq_stall = pdev->irq;
g->irq_nonstall = pdev->irq;
if (g->irq_stall < 0)
return -ENXIO;
err = devm_request_threaded_irq(&pdev->dev,
g->irq_stall,
nvgpu_pci_isr,
nvgpu_pci_intr_thread,
IRQF_SHARED, "nvgpu", g);
if (err) {
gk20a_err(&pdev->dev,
"failed to request irq @ %d", g->irq_stall);
return err;
}
disable_irq(g->irq_stall);
err = nvgpu_pci_init_support(pdev);
if (err)
return err;
if (strchr(dev_name(&pdev->dev), '%')) {
gk20a_err(&pdev->dev, "illegal character in device name");
return -EINVAL;
}
nodefmt = kasprintf(GFP_KERNEL, PCI_INTERFACE_NAME, dev_name(&pdev->dev));
if (!nodefmt)
return -ENOMEM;
err = nvgpu_probe(g, "gpu_pci", nodefmt, &nvgpu_pci_class);
if (err)
return err;
kfree(nodefmt);
nodefmt = NULL;
err = nvgpu_pci_pm_init(&pdev->dev);
if (err) {
gk20a_err(&pdev->dev, "pm init failed");
return err;
}
g->mm.has_physical_mode = false;
return 0;
}
static void nvgpu_pci_remove(struct pci_dev *pdev)
{
struct gk20a_platform *platform = gk20a_get_platform(&pdev->dev);
struct gk20a *g = get_gk20a(&pdev->dev);
gk20a_dbg(gpu_dbg_shutdown, "Removing nvgpu driver!\n");
gk20a_driver_start_unload(g);
disable_irq(g->irq_stall);
devm_free_irq(&pdev->dev, g->irq_stall, g);
gk20a_dbg(gpu_dbg_shutdown, "IRQs disabled.\n");
/*
* Wait for the driver to finish up all the IOCTLs it's working on
* before cleaning up the driver's data structures.
*/
gk20a_wait_for_idle(&pdev->dev);
gk20a_dbg(gpu_dbg_shutdown, "Driver idle.\n");
gk20a_user_deinit(g->dev, &nvgpu_pci_class);
gk20a_dbg(gpu_dbg_shutdown, "User de-init done.\b");
if (g->remove_support)
g->remove_support(g->dev);
debugfs_remove_recursive(platform->debugfs);
debugfs_remove_recursive(platform->debugfs_alias);
gk20a_remove_sysfs(g->dev);
if (platform->remove)
platform->remove(g->dev);
gk20a_dbg(gpu_dbg_shutdown, "Platform remove done.\b");
kfree(g);
}
static struct pci_driver nvgpu_pci_driver = {
.name = "nvgpu",
.id_table = nvgpu_pci_table,
.probe = nvgpu_pci_probe,
.remove = nvgpu_pci_remove,
#ifdef CONFIG_PM
.driver.pm = &nvgpu_pci_pm_ops,
#endif
};
int __init nvgpu_pci_init(void)
{
int ret;
ret = class_register(&nvgpu_pci_class);
if (ret)
return ret;
return pci_register_driver(&nvgpu_pci_driver);
}
void __exit nvgpu_pci_exit(void)
{
pci_unregister_driver(&nvgpu_pci_driver);
class_unregister(&nvgpu_pci_class);
}