drm/i915/gvt: Introduce a framework for tracking HW registers.

This patch introduces a framework for tracking HW registers on different
GEN platforms.

Accesses to GEN HW registers from VMs will be trapped by hypervisor. It
will forward these emulation requests to GVT-g device model, which
requires this framework to search for related register descriptions.

Each MMIO entry in this framework describes a GEN HW registers, e.g.
offset, length, whether it contains RO bits, whether it can be accessed by
LRIs...and also emulation handlers for emulating register reading and
writing.

- Use i915 MMIO register definition & statement.(Joonas)

Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>

1 files changed, 89 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/gvt/mmio.h b/drivers/gpu/drm/i915/gvt/mmio.h
new file mode 100644
index 000000000000..1fb1b49f912c
--- /dev/null
+++ b/drivers/gpu/drm/i915/gvt/mmio.h
@@ -0,0 +1,89 @@
+/*
+ * Copyright(c) 2011-2016 Intel Corporation. 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 OR COPYRIGHT HOLDERS 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.
+ *
+ * Authors:
+ *    Ke Yu
+ *    Kevin Tian <kevin.tian@intel.com>
+ *    Dexuan Cui
+ *
+ * Contributors:
+ *    Tina Zhang <tina.zhang@intel.com>
+ *    Min He <min.he@intel.com>
+ *    Niu Bing <bing.niu@intel.com>
+ *    Zhi Wang <zhi.a.wang@intel.com>
+ *
+ */
+
+#ifndef _GVT_MMIO_H_
+#define _GVT_MMIO_H_
+
+struct intel_gvt;
+struct intel_vgpu;
+
+#define D_SNB   (1 << 0)
+#define D_IVB   (1 << 1)
+#define D_HSW   (1 << 2)
+#define D_BDW   (1 << 3)
+#define D_SKL	(1 << 4)
+
+#define D_GEN9PLUS	(D_SKL)
+#define D_GEN8PLUS	(D_BDW | D_SKL)
+#define D_GEN75PLUS	(D_HSW | D_BDW | D_SKL)
+#define D_GEN7PLUS	(D_IVB | D_HSW | D_BDW | D_SKL)
+
+#define D_SKL_PLUS	(D_SKL)
+#define D_BDW_PLUS	(D_BDW | D_SKL)
+#define D_HSW_PLUS	(D_HSW | D_BDW | D_SKL)
+#define D_IVB_PLUS	(D_IVB | D_HSW | D_BDW | D_SKL)
+
+#define D_PRE_BDW	(D_SNB | D_IVB | D_HSW)
+#define D_PRE_SKL	(D_SNB | D_IVB | D_HSW | D_BDW)
+#define D_ALL		(D_SNB | D_IVB | D_HSW | D_BDW | D_SKL)
+
+struct intel_gvt_mmio_info {
+	u32 offset;
+	u32 size;
+	u32 length;
+	u32 addr_mask;
+	u64 ro_mask;
+	u32 device;
+	int (*read)(struct intel_vgpu *, unsigned int, void *, unsigned int);
+	int (*write)(struct intel_vgpu *, unsigned int, void *, unsigned int);
+	u32 addr_range;
+	struct hlist_node node;
+};
+
+unsigned long intel_gvt_get_device_type(struct intel_gvt *gvt);
+bool intel_gvt_match_device(struct intel_gvt *gvt, unsigned long device);
+
+int intel_gvt_setup_mmio_info(struct intel_gvt *gvt);
+void intel_gvt_clean_mmio_info(struct intel_gvt *gvt);
+
+struct intel_gvt_mmio_info *intel_gvt_find_mmio_info(struct intel_gvt *gvt,
+						     unsigned int offset);
+#define INTEL_GVT_MMIO_OFFSET(reg) ({ \
+	typeof(reg) __reg = reg; \
+	u32 *offset = (u32 *)&__reg; \
+	*offset; \
+})
+
+#endif