Merge remote-tracking branch 'drm/drm-next' into msm-next

Back-merge drm-next to (indirectly) get arm-smmu updates for making
stall-on-fault more reliable.

Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>

1 files changed, 89 insertions, 0 deletions

diff --git a/drivers/gpu/drm/panthor/panthor_device.h b/drivers/gpu/drm/panthor/panthor_device.h
index 465d3ab1b79e..4fc7cf2aeed5 100644
--- a/drivers/gpu/drm/panthor/panthor_device.h
+++ b/drivers/gpu/drm/panthor/panthor_device.h
@@ -230,6 +230,24 @@ struct panthor_file {
 	/** @ptdev: Device attached to this file. */
 	struct panthor_device *ptdev;
 
+	/** @user_mmio: User MMIO related fields. */
+	struct {
+		/**
+		 * @offset: Offset used for user MMIO mappings.
+		 *
+		 * This offset should not be used to check the type of mapping
+		 * except in panthor_mmap(). After that point, MMIO mapping
+		 * offsets have been adjusted to match
+		 * DRM_PANTHOR_USER_MMIO_OFFSET and that macro should be used
+		 * instead.
+		 * Make sure this rule is followed at all times, because
+		 * userspace is in control of the offset, and can change the
+		 * value behind our back. Otherwise it can lead to erroneous
+		 * branching happening in kernel space.
+		 */
+		u64 offset;
+	} user_mmio;
+
 	/** @vms: VM pool attached to this file. */
 	struct panthor_vm_pool *vms;
 
@@ -437,4 +455,75 @@ static int panthor_request_ ## __name ## _irq(struct panthor_device *ptdev,			\
 
 extern struct workqueue_struct *panthor_cleanup_wq;
 
+static inline void gpu_write(struct panthor_device *ptdev, u32 reg, u32 data)
+{
+	writel(data, ptdev->iomem + reg);
+}
+
+static inline u32 gpu_read(struct panthor_device *ptdev, u32 reg)
+{
+	return readl(ptdev->iomem + reg);
+}
+
+static inline u32 gpu_read_relaxed(struct panthor_device *ptdev, u32 reg)
+{
+	return readl_relaxed(ptdev->iomem + reg);
+}
+
+static inline void gpu_write64(struct panthor_device *ptdev, u32 reg, u64 data)
+{
+	gpu_write(ptdev, reg, lower_32_bits(data));
+	gpu_write(ptdev, reg + 4, upper_32_bits(data));
+}
+
+static inline u64 gpu_read64(struct panthor_device *ptdev, u32 reg)
+{
+	return (gpu_read(ptdev, reg) | ((u64)gpu_read(ptdev, reg + 4) << 32));
+}
+
+static inline u64 gpu_read64_relaxed(struct panthor_device *ptdev, u32 reg)
+{
+	return (gpu_read_relaxed(ptdev, reg) |
+		((u64)gpu_read_relaxed(ptdev, reg + 4) << 32));
+}
+
+static inline u64 gpu_read64_counter(struct panthor_device *ptdev, u32 reg)
+{
+	u32 lo, hi1, hi2;
+	do {
+		hi1 = gpu_read(ptdev, reg + 4);
+		lo = gpu_read(ptdev, reg);
+		hi2 = gpu_read(ptdev, reg + 4);
+	} while (hi1 != hi2);
+	return lo | ((u64)hi2 << 32);
+}
+
+#define gpu_read_poll_timeout(dev, reg, val, cond, delay_us, timeout_us)	\
+	read_poll_timeout(gpu_read, val, cond, delay_us, timeout_us, false,	\
+			  dev, reg)
+
+#define gpu_read_poll_timeout_atomic(dev, reg, val, cond, delay_us,		\
+				     timeout_us)				\
+	read_poll_timeout_atomic(gpu_read, val, cond, delay_us, timeout_us,	\
+				 false, dev, reg)
+
+#define gpu_read64_poll_timeout(dev, reg, val, cond, delay_us, timeout_us)	\
+	read_poll_timeout(gpu_read64, val, cond, delay_us, timeout_us, false,	\
+			  dev, reg)
+
+#define gpu_read64_poll_timeout_atomic(dev, reg, val, cond, delay_us,		\
+				       timeout_us)				\
+	read_poll_timeout_atomic(gpu_read64, val, cond, delay_us, timeout_us,	\
+				 false, dev, reg)
+
+#define gpu_read_relaxed_poll_timeout_atomic(dev, reg, val, cond, delay_us,	\
+					     timeout_us)			\
+	read_poll_timeout_atomic(gpu_read_relaxed, val, cond, delay_us,		\
+				 timeout_us, false, dev, reg)
+
+#define gpu_read64_relaxed_poll_timeout(dev, reg, val, cond, delay_us,		\
+					timeout_us)				\
+	read_poll_timeout(gpu_read64_relaxed, val, cond, delay_us, timeout_us,	\
+			  false, dev, reg)
+
 #endif