Author: mmel
Date: Mon Dec 26 14:28:23 2016
New Revision: 310599
URL: https://svnweb.freebsd.org/changeset/base/310599
Log:
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
Added:
head/sys/dev/drm2/drm_platform.c (contents, props changed)
Modified:
head/sys/conf/files
head/sys/dev/drm2/drmP.h
Modified: head/sys/conf/files
==============================================================================
--- head/sys/conf/files Mon Dec 26 12:41:38 2016 (r310598)
+++ head/sys/conf/files Mon Dec 26 14:28:23 2016 (r310599)
@@ -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
Modified: head/sys/dev/drm2/drmP.h
==============================================================================
--- head/sys/dev/drm2/drmP.h Mon Dec 26 12:41:38 2016 (r310598)
+++ head/sys/dev/drm2/drmP.h Mon Dec 26 14:28:23 2016 (r310599)
@@ -1576,6 +1576,10 @@ extern int drm_pcie_get_speed_cap_mask(s
#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)
Added: head/sys/dev/drm2/drm_platform.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/dev/drm2/drm_platform.c Mon Dec 26 14:28:23 2016
(r310599)
@@ -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 <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <dev/drm2/drmP.h>
+
+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);
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