drm/etnaviv: add initial etnaviv DRM driver

This adds the etnaviv DRM driver and hooks it up in Makefiles
and Kconfig.

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 161 insertions, 0 deletions

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.h b/drivers/gpu/drm/etnaviv/etnaviv_drv.h
new file mode 100644
index 000000000000..d6bd438bd5be
--- /dev/null
+++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.h
@@ -0,0 +1,161 @@
+/*
+ * Copyright (C) 2015 Etnaviv Project
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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/>.
+ */
+
+#ifndef __ETNAVIV_DRV_H__
+#define __ETNAVIV_DRV_H__
+
+#include <linux/kernel.h>
+#include <linux/clk.h>
+#include <linux/cpufreq.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/list.h>
+#include <linux/iommu.h>
+#include <linux/types.h>
+#include <linux/sizes.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_gem.h>
+#include <drm/etnaviv_drm.h>
+
+struct etnaviv_cmdbuf;
+struct etnaviv_gpu;
+struct etnaviv_mmu;
+struct etnaviv_gem_object;
+struct etnaviv_gem_submit;
+
+struct etnaviv_file_private {
+	/* currently we don't do anything useful with this.. but when
+	 * per-context address spaces are supported we'd keep track of
+	 * the context's page-tables here.
+	 */
+	int dummy;
+};
+
+struct etnaviv_drm_private {
+	int num_gpus;
+	struct etnaviv_gpu *gpu[ETNA_MAX_PIPES];
+
+	/* list of GEM objects: */
+	struct mutex gem_lock;
+	struct list_head gem_list;
+
+	struct workqueue_struct *wq;
+};
+
+static inline void etnaviv_queue_work(struct drm_device *dev,
+	struct work_struct *w)
+{
+	struct etnaviv_drm_private *priv = dev->dev_private;
+
+	queue_work(priv->wq, w);
+}
+
+int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data,
+		struct drm_file *file);
+
+int etnaviv_gem_mmap(struct file *filp, struct vm_area_struct *vma);
+int etnaviv_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
+int etnaviv_gem_mmap_offset(struct drm_gem_object *obj, u64 *offset);
+int etnaviv_gem_get_iova(struct etnaviv_gpu *gpu,
+	struct drm_gem_object *obj, u32 *iova);
+void etnaviv_gem_put_iova(struct etnaviv_gpu *gpu, struct drm_gem_object *obj);
+struct sg_table *etnaviv_gem_prime_get_sg_table(struct drm_gem_object *obj);
+void *etnaviv_gem_prime_vmap(struct drm_gem_object *obj);
+void etnaviv_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
+struct drm_gem_object *etnaviv_gem_prime_import_sg_table(struct drm_device *dev,
+	struct dma_buf_attachment *attach, struct sg_table *sg);
+int etnaviv_gem_prime_pin(struct drm_gem_object *obj);
+void etnaviv_gem_prime_unpin(struct drm_gem_object *obj);
+void *etnaviv_gem_vaddr(struct drm_gem_object *obj);
+int etnaviv_gem_cpu_prep(struct drm_gem_object *obj, u32 op,
+		struct timespec *timeout);
+int etnaviv_gem_cpu_fini(struct drm_gem_object *obj);
+void etnaviv_gem_free_object(struct drm_gem_object *obj);
+int etnaviv_gem_new_handle(struct drm_device *dev, struct drm_file *file,
+		u32 size, u32 flags, u32 *handle);
+struct drm_gem_object *etnaviv_gem_new_locked(struct drm_device *dev,
+		u32 size, u32 flags);
+struct drm_gem_object *etnaviv_gem_new(struct drm_device *dev,
+		u32 size, u32 flags);
+int etnaviv_gem_new_userptr(struct drm_device *dev, struct drm_file *file,
+	uintptr_t ptr, u32 size, u32 flags, u32 *handle);
+u16 etnaviv_buffer_init(struct etnaviv_gpu *gpu);
+void etnaviv_buffer_end(struct etnaviv_gpu *gpu);
+void etnaviv_buffer_queue(struct etnaviv_gpu *gpu, unsigned int event,
+	struct etnaviv_cmdbuf *cmdbuf);
+void etnaviv_validate_init(void);
+bool etnaviv_cmd_validate_one(struct etnaviv_gpu *gpu,
+	u32 *stream, unsigned int size,
+	struct drm_etnaviv_gem_submit_reloc *relocs, unsigned int reloc_size);
+
+#ifdef CONFIG_DEBUG_FS
+void etnaviv_gem_describe_objects(struct etnaviv_drm_private *priv,
+	struct seq_file *m);
+#endif
+
+void __iomem *etnaviv_ioremap(struct platform_device *pdev, const char *name,
+		const char *dbgname);
+void etnaviv_writel(u32 data, void __iomem *addr);
+u32 etnaviv_readl(const void __iomem *addr);
+
+#define DBG(fmt, ...) DRM_DEBUG(fmt"\n", ##__VA_ARGS__)
+#define VERB(fmt, ...) if (0) DRM_DEBUG(fmt"\n", ##__VA_ARGS__)
+
+/*
+ * Return the storage size of a structure with a variable length array.
+ * The array is nelem elements of elem_size, where the base structure
+ * is defined by base.  If the size overflows size_t, return zero.
+ */
+static inline size_t size_vstruct(size_t nelem, size_t elem_size, size_t base)
+{
+	if (elem_size && nelem > (SIZE_MAX - base) / elem_size)
+		return 0;
+	return base + nelem * elem_size;
+}
+
+/* returns true if fence a comes after fence b */
+static inline bool fence_after(u32 a, u32 b)
+{
+	return (s32)(a - b) > 0;
+}
+
+static inline bool fence_after_eq(u32 a, u32 b)
+{
+	return (s32)(a - b) >= 0;
+}
+
+static inline unsigned long etnaviv_timeout_to_jiffies(
+	const struct timespec *timeout)
+{
+	unsigned long timeout_jiffies = timespec_to_jiffies(timeout);
+	unsigned long start_jiffies = jiffies;
+	unsigned long remaining_jiffies;
+
+	if (time_after(start_jiffies, timeout_jiffies))
+		remaining_jiffies = 0;
+	else
+		remaining_jiffies = timeout_jiffies - start_jiffies;
+
+	return remaining_jiffies;
+}
+
+#endif /* __ETNAVIV_DRV_H__ */