drm/xe/uapi: Remove MMIO ioctl

This was previously used in UMD for timestamp correlation, which can now
be done with DRM_XE_QUERY_CS_CYCLES.

Link: https://lore.kernel.org/all/20230706042044.GR6953@mdroper-desk1.amr.corp.intel.com/
Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/636Signed-off-by: Francois Dugast <francois.dugast@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/xe/xe_device.c

@@ -121,7 +121,6 @@ static const struct drm_ioctl_desc xe_ioctls[] = {
 	DRM_IOCTL_DEF_DRV(XE_EXEC_QUEUE_DESTROY, xe_exec_queue_destroy_ioctl,
 			  DRM_RENDER_ALLOW),
 	DRM_IOCTL_DEF_DRV(XE_EXEC, xe_exec_ioctl, DRM_RENDER_ALLOW),
-	DRM_IOCTL_DEF_DRV(XE_MMIO, xe_mmio_ioctl, DRM_RENDER_ALLOW),
 	DRM_IOCTL_DEF_DRV(XE_EXEC_QUEUE_SET_PROPERTY, xe_exec_queue_set_property_ioctl,
 			  DRM_RENDER_ALLOW),
 	DRM_IOCTL_DEF_DRV(XE_WAIT_USER_FENCE, xe_wait_user_fence_ioctl,

drivers/gpu/drm/xe/xe_mmio.c

@@ -429,108 +429,6 @@ int xe_mmio_init(struct xe_device *xe)
 	return 0;
 }
 
-#define VALID_MMIO_FLAGS (\
-	DRM_XE_MMIO_BITS_MASK |\
-	DRM_XE_MMIO_READ |\
-	DRM_XE_MMIO_WRITE)
-
-static const struct xe_reg mmio_read_whitelist[] = {
-	RING_TIMESTAMP(RENDER_RING_BASE),
-};
-
-int xe_mmio_ioctl(struct drm_device *dev, void *data,
-		  struct drm_file *file)
-{
-	struct xe_device *xe = to_xe_device(dev);
-	struct xe_gt *gt = xe_root_mmio_gt(xe);
-	struct drm_xe_mmio *args = data;
-	unsigned int bits_flag, bytes;
-	struct xe_reg reg;
-	bool allowed;
-	int ret = 0;
-
-	if (XE_IOCTL_DBG(xe, args->extensions) ||
-	    XE_IOCTL_DBG(xe, args->reserved[0] || args->reserved[1]))
-		return -EINVAL;
-
-	if (XE_IOCTL_DBG(xe, args->flags & ~VALID_MMIO_FLAGS))
-		return -EINVAL;
-
-	if (XE_IOCTL_DBG(xe, !(args->flags & DRM_XE_MMIO_WRITE) && args->value))
-		return -EINVAL;
-
-	allowed = capable(CAP_SYS_ADMIN);
-	if (!allowed && ((args->flags & ~DRM_XE_MMIO_BITS_MASK) == DRM_XE_MMIO_READ)) {
-		unsigned int i;
-
-		for (i = 0; i < ARRAY_SIZE(mmio_read_whitelist); i++) {
-			if (mmio_read_whitelist[i].addr == args->addr) {
-				allowed = true;
-				break;
-			}
-		}
-	}
-
-	if (XE_IOCTL_DBG(xe, !allowed))
-		return -EPERM;
-
-	bits_flag = args->flags & DRM_XE_MMIO_BITS_MASK;
-	bytes = 1 << bits_flag;
-	if (XE_IOCTL_DBG(xe, args->addr + bytes > xe->mmio.size))
-		return -EINVAL;
-
-	/*
-	 * TODO: migrate to xe_gt_mcr to lookup the mmio range and handle
-	 * multicast registers. Steering would need uapi extension.
-	 */
-	reg = XE_REG(args->addr);
-
-	xe_device_mem_access_get(xe);
-	xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL);
-
-	if (args->flags & DRM_XE_MMIO_WRITE) {
-		switch (bits_flag) {
-		case DRM_XE_MMIO_32BIT:
-			if (XE_IOCTL_DBG(xe, args->value > U32_MAX)) {
-				ret = -EINVAL;
-				goto exit;
-			}
-			xe_mmio_write32(gt, reg, args->value);
-			break;
-		default:
-			drm_dbg(&xe->drm, "Invalid MMIO bit size");
-			fallthrough;
-		case DRM_XE_MMIO_8BIT: /* TODO */
-		case DRM_XE_MMIO_16BIT: /* TODO */
-			ret = -EOPNOTSUPP;
-			goto exit;
-		}
-	}
-
-	if (args->flags & DRM_XE_MMIO_READ) {
-		switch (bits_flag) {
-		case DRM_XE_MMIO_32BIT:
-			args->value = xe_mmio_read32(gt, reg);
-			break;
-		case DRM_XE_MMIO_64BIT:
-			args->value = xe_mmio_read64_2x32(gt, reg);
-			break;
-		default:
-			drm_dbg(&xe->drm, "Invalid MMIO bit size");
-			fallthrough;
-		case DRM_XE_MMIO_8BIT: /* TODO */
-		case DRM_XE_MMIO_16BIT: /* TODO */
-			ret = -EOPNOTSUPP;
-		}
-	}
-
-exit:
-	xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL);
-	xe_device_mem_access_put(xe);
-
-	return ret;
-}
-
 /**
  * xe_mmio_read64_2x32() - Read a 64-bit register as two 32-bit reads
  * @gt: MMIO target GT

drivers/gpu/drm/xe/xe_mmio.h

@@ -124,9 +124,6 @@ static inline int xe_mmio_wait32(struct xe_gt *gt, struct xe_reg reg, u32 mask,
 	return ret;
 }
 
-int xe_mmio_ioctl(struct drm_device *dev, void *data,
-		  struct drm_file *file);
-
 static inline bool xe_mmio_in_range(const struct xe_gt *gt,
 				    const struct xe_mmio_range *range,
 				    struct xe_reg reg)

include/uapi/drm/xe_drm.h

@@ -106,11 +106,10 @@ struct xe_user_extension {
 #define DRM_XE_EXEC_QUEUE_CREATE		0x06
 #define DRM_XE_EXEC_QUEUE_DESTROY		0x07
 #define DRM_XE_EXEC			0x08
-#define DRM_XE_MMIO			0x09
-#define DRM_XE_EXEC_QUEUE_SET_PROPERTY	0x0a
-#define DRM_XE_WAIT_USER_FENCE		0x0b
-#define DRM_XE_VM_MADVISE		0x0c
-#define DRM_XE_EXEC_QUEUE_GET_PROPERTY	0x0d
+#define DRM_XE_EXEC_QUEUE_SET_PROPERTY	0x09
+#define DRM_XE_WAIT_USER_FENCE		0x0a
+#define DRM_XE_VM_MADVISE		0x0b
+#define DRM_XE_EXEC_QUEUE_GET_PROPERTY	0x0c
 
 /* Must be kept compact -- no holes */
 #define DRM_IOCTL_XE_DEVICE_QUERY		DRM_IOWR(DRM_COMMAND_BASE + DRM_XE_DEVICE_QUERY, struct drm_xe_device_query)
@@ -123,7 +122,6 @@ struct xe_user_extension {
 #define DRM_IOCTL_XE_EXEC_QUEUE_GET_PROPERTY	DRM_IOWR(DRM_COMMAND_BASE + DRM_XE_EXEC_QUEUE_GET_PROPERTY, struct drm_xe_exec_queue_get_property)
 #define DRM_IOCTL_XE_EXEC_QUEUE_DESTROY		 DRM_IOW(DRM_COMMAND_BASE + DRM_XE_EXEC_QUEUE_DESTROY, struct drm_xe_exec_queue_destroy)
 #define DRM_IOCTL_XE_EXEC			 DRM_IOW(DRM_COMMAND_BASE + DRM_XE_EXEC, struct drm_xe_exec)
-#define DRM_IOCTL_XE_MMIO			DRM_IOWR(DRM_COMMAND_BASE + DRM_XE_MMIO, struct drm_xe_mmio)
 #define DRM_IOCTL_XE_EXEC_QUEUE_SET_PROPERTY	 DRM_IOW(DRM_COMMAND_BASE + DRM_XE_EXEC_QUEUE_SET_PROPERTY, struct drm_xe_exec_queue_set_property)
 #define DRM_IOCTL_XE_WAIT_USER_FENCE		DRM_IOWR(DRM_COMMAND_BASE + DRM_XE_WAIT_USER_FENCE, struct drm_xe_wait_user_fence)
 #define DRM_IOCTL_XE_VM_MADVISE			 DRM_IOW(DRM_COMMAND_BASE + DRM_XE_VM_MADVISE, struct drm_xe_vm_madvise)
@@ -936,27 +934,6 @@ struct drm_xe_exec {
 	__u64 reserved[2];
 };
 
-struct drm_xe_mmio {
-	/** @extensions: Pointer to the first extension struct, if any */
-	__u64 extensions;
-
-	__u32 addr;
-
-#define DRM_XE_MMIO_8BIT	0x0
-#define DRM_XE_MMIO_16BIT	0x1
-#define DRM_XE_MMIO_32BIT	0x2
-#define DRM_XE_MMIO_64BIT	0x3
-#define DRM_XE_MMIO_BITS_MASK	0x3
-#define DRM_XE_MMIO_READ	0x4
-#define DRM_XE_MMIO_WRITE	0x8
-	__u32 flags;
-
-	__u64 value;
-
-	/** @reserved: Reserved */
-	__u64 reserved[2];
-};
-
 /**
  * struct drm_xe_wait_user_fence - wait user fence
  *