From b4868aefd802e5a71a989c4be79e981d66566b33 Mon Sep 17 00:00:00 2001 From: mmel Date: Mon, 26 Dec 2016 14:28:23 +0000 Subject: [PATCH] Import drm_patform.c, an implementation of non-PCI based attachment for graphics drivers. It will be used in upcoming driver for Nvidia Tegra boards. MFC after: 1 month --- sys/conf/files | 1 + sys/dev/drm2/drmP.h | 4 + sys/dev/drm2/drm_platform.c | 183 ++++++++++++++++++++++++++++++++++++ 3 files changed, 188 insertions(+) create mode 100644 sys/dev/drm2/drm_platform.c diff --git a/sys/conf/files b/sys/conf/files index 79b1c8d6e558..da68aca85002 100644 --- a/sys/conf/files +++ b/sys/conf/files @@ -1544,6 +1544,7 @@ dev/drm2/drm_memory.c optional drm2 dev/drm2/drm_mm.c optional drm2 dev/drm2/drm_modes.c optional drm2 dev/drm2/drm_pci.c optional drm2 +dev/drm2/drm_platform.c optional drm2 dev/drm2/drm_scatter.c optional drm2 dev/drm2/drm_stub.c optional drm2 dev/drm2/drm_sysctl.c optional drm2 diff --git a/sys/dev/drm2/drmP.h b/sys/dev/drm2/drmP.h index 51f407c14a94..3483cee821bd 100644 --- a/sys/dev/drm2/drmP.h +++ b/sys/dev/drm2/drmP.h @@ -1576,6 +1576,10 @@ extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask); #define drm_can_sleep() (DRM_HZ & 1) +/* Platform section */ +int drm_get_platform_dev(device_t kdev, struct drm_device *dev, + struct drm_driver *driver); + /* FreeBSD specific -- should be moved to drm_os_freebsd.h */ #define DRM_GEM_MAPPING_MASK (3ULL << 62) diff --git a/sys/dev/drm2/drm_platform.c b/sys/dev/drm2/drm_platform.c new file mode 100644 index 000000000000..a8972b44f5f1 --- /dev/null +++ b/sys/dev/drm2/drm_platform.c @@ -0,0 +1,183 @@ +/* + * Derived from drm_pci.c + * + * Copyright 2003 José Fonseca. + * Copyright 2003 Leif Delgass. + * Copyright (c) 2009, Code Aurora Forum. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ +#include +__FBSDID("$FreeBSD$"); + +#include + +static void drm_platform_free_irq(struct drm_device *dev) +{ + if (dev->irqr == NULL) + return; + + bus_release_resource(dev->dev, SYS_RES_IRQ, + dev->irqrid, dev->irqr); + + dev->irqr = NULL; + dev->irq = 0; +} + +static const char *drm_platform_get_name(struct drm_device *dev) +{ + return dev->driver->name; +} + +static int drm_platform_set_busid(struct drm_device *dev, struct drm_master *master) +{ + int len, ret, id; + + master->unique_len = 13 + strlen(dev->driver->name); + master->unique_size = master->unique_len; + master->unique = malloc(master->unique_len + 1, DRM_MEM_DRIVER, M_NOWAIT); + + if (master->unique == NULL) + return -ENOMEM; + + id = 0; // XXX dev->driver->id; + + /* if only a single instance of the platform device, id will be + * set to -1.. use 0 instead to avoid a funny looking bus-id: + */ + if (id == -1) + id = 0; + + len = snprintf(master->unique, master->unique_len, + "platform:%s:%02d", dev->driver->name, id); + + if (len > master->unique_len) { + DRM_ERROR("Unique buffer overflowed\n"); + ret = -EINVAL; + goto err; + } + + return 0; +err: + return ret; +} + +static int drm_platform_get_irq(struct drm_device *dev) +{ + if (dev->irqr) + return (dev->irq); + + dev->irqr = bus_alloc_resource_any(dev->dev, SYS_RES_IRQ, + &dev->irqrid, RF_SHAREABLE); + if (!dev->irqr) { + dev_err(dev->dev, "Failed to allocate IRQ\n"); + return (0); + } + + dev->irq = (int) rman_get_start(dev->irqr); + + return (dev->irq); +} + +static struct drm_bus drm_platform_bus = { + .bus_type = DRIVER_BUS_PLATFORM, + .get_irq = drm_platform_get_irq, + .free_irq = drm_platform_free_irq, + .get_name = drm_platform_get_name, + .set_busid = drm_platform_set_busid, +}; + +/** + * Register. + * + * \param platdev - Platform device struture + * \return zero on success or a negative number on failure. + * + * Attempt to gets inter module "drm" information. If we are first + * then register the character device and inter module information. + * Try and register, if we fail to register, backout previous work. + */ + +int drm_get_platform_dev(device_t kdev, struct drm_device *dev, + struct drm_driver *driver) +{ + int ret; + + DRM_DEBUG("\n"); + + driver->bus = &drm_platform_bus; + + dev->dev = kdev; + + sx_xlock(&drm_global_mutex); + + ret = drm_fill_in_dev(dev, driver); + + if (ret) { + printf("DRM: Fill_in_dev failed.\n"); + goto err_g1; + } + + if (drm_core_check_feature(dev, DRIVER_MODESET)) { + ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL); + if (ret) + goto err_g1; + } + + ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY); + if (ret) + goto err_g2; + + if (dev->driver->load) { + ret = dev->driver->load(dev, 0); + if (ret) + goto err_g3; + } + + /* setup the grouping for the legacy output */ + if (drm_core_check_feature(dev, DRIVER_MODESET)) { + ret = drm_mode_group_init_legacy_group(dev, + &dev->primary->mode_group); + if (ret) + goto err_g3; + } + +#ifdef FREEBSD_NOTYET + list_add_tail(&dev->driver_item, &driver->device_list); +#endif /* FREEBSD_NOTYET */ + + sx_xunlock(&drm_global_mutex); + + DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", + driver->name, driver->major, driver->minor, driver->patchlevel, + driver->date, dev->primary->index); + + return 0; + +err_g3: + drm_put_minor(&dev->primary); +err_g2: + if (drm_core_check_feature(dev, DRIVER_MODESET)) + drm_put_minor(&dev->control); +err_g1: + sx_xunlock(&drm_global_mutex); + return ret; +} +EXPORT_SYMBOL(drm_get_platform_dev);