drm/i915/gvt: vGPU interrupt virtualization.
This patch introduces vGPU interrupt emulation framework.
The vGPU intrerrupt emulation framework is an event-based interrupt
emulation framework. It's responsible for emulating GEN hardware interrupts
during emulating other HW behaviour.
It consists several components:
- Descriptions of interrupt register bit
- Upper level <-> lower level interrupt mapping
- GEN HW IER/IMR/IIR register emulation routines
- Event-based interrupt propagation interface
When a GVT-g component wants to inject an interrupt to a VM during a
emulation, first it should specify the event needs to be emulated and the
framework will deal with the rest of emulation:
- Generating related virtual IIR bit according to virtual IER and IMRs,
- Generate related virtual upper level virtual IIR bit accodring to the
per-platform interrupt mapping
- Injecting a MSI to VM
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
diff --git a/drivers/gpu/drm/i915/gvt/interrupt.c b/drivers/gpu/drm/i915/gvt/interrupt.c
new file mode 100644
index 0000000..d90c5f6
--- /dev/null
+++ b/drivers/gpu/drm/i915/gvt/interrupt.c
@@ -0,0 +1,714 @@
+/*
+ * 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:
+ * Kevin Tian <kevin.tian@intel.com>
+ * Zhi Wang <zhi.a.wang@intel.com>
+ *
+ * Contributors:
+ * Min he <min.he@intel.com>
+ *
+ */
+
+#include "i915_drv.h"
+
+/* common offset among interrupt control registers */
+#define regbase_to_isr(base) (base)
+#define regbase_to_imr(base) (base + 0x4)
+#define regbase_to_iir(base) (base + 0x8)
+#define regbase_to_ier(base) (base + 0xC)
+
+#define iir_to_regbase(iir) (iir - 0x8)
+#define ier_to_regbase(ier) (ier - 0xC)
+
+#define get_event_virt_handler(irq, e) (irq->events[e].v_handler)
+#define get_irq_info(irq, e) (irq->events[e].info)
+
+#define irq_to_gvt(irq) \
+ container_of(irq, struct intel_gvt, irq)
+
+static void update_upstream_irq(struct intel_vgpu *vgpu,
+ struct intel_gvt_irq_info *info);
+
+const char * const irq_name[INTEL_GVT_EVENT_MAX] = {
+ [RCS_MI_USER_INTERRUPT] = "Render CS MI USER INTERRUPT",
+ [RCS_DEBUG] = "Render EU debug from SVG",
+ [RCS_MMIO_SYNC_FLUSH] = "Render MMIO sync flush status",
+ [RCS_CMD_STREAMER_ERR] = "Render CS error interrupt",
+ [RCS_PIPE_CONTROL] = "Render PIPE CONTROL notify",
+ [RCS_WATCHDOG_EXCEEDED] = "Render CS Watchdog counter exceeded",
+ [RCS_PAGE_DIRECTORY_FAULT] = "Render page directory faults",
+ [RCS_AS_CONTEXT_SWITCH] = "Render AS Context Switch Interrupt",
+
+ [VCS_MI_USER_INTERRUPT] = "Video CS MI USER INTERRUPT",
+ [VCS_MMIO_SYNC_FLUSH] = "Video MMIO sync flush status",
+ [VCS_CMD_STREAMER_ERR] = "Video CS error interrupt",
+ [VCS_MI_FLUSH_DW] = "Video MI FLUSH DW notify",
+ [VCS_WATCHDOG_EXCEEDED] = "Video CS Watchdog counter exceeded",
+ [VCS_PAGE_DIRECTORY_FAULT] = "Video page directory faults",
+ [VCS_AS_CONTEXT_SWITCH] = "Video AS Context Switch Interrupt",
+ [VCS2_MI_USER_INTERRUPT] = "VCS2 Video CS MI USER INTERRUPT",
+ [VCS2_MI_FLUSH_DW] = "VCS2 Video MI FLUSH DW notify",
+ [VCS2_AS_CONTEXT_SWITCH] = "VCS2 Context Switch Interrupt",
+
+ [BCS_MI_USER_INTERRUPT] = "Blitter CS MI USER INTERRUPT",
+ [BCS_MMIO_SYNC_FLUSH] = "Billter MMIO sync flush status",
+ [BCS_CMD_STREAMER_ERR] = "Blitter CS error interrupt",
+ [BCS_MI_FLUSH_DW] = "Blitter MI FLUSH DW notify",
+ [BCS_PAGE_DIRECTORY_FAULT] = "Blitter page directory faults",
+ [BCS_AS_CONTEXT_SWITCH] = "Blitter AS Context Switch Interrupt",
+
+ [VECS_MI_FLUSH_DW] = "Video Enhanced Streamer MI FLUSH DW notify",
+ [VECS_AS_CONTEXT_SWITCH] = "VECS Context Switch Interrupt",
+
+ [PIPE_A_FIFO_UNDERRUN] = "Pipe A FIFO underrun",
+ [PIPE_A_CRC_ERR] = "Pipe A CRC error",
+ [PIPE_A_CRC_DONE] = "Pipe A CRC done",
+ [PIPE_A_VSYNC] = "Pipe A vsync",
+ [PIPE_A_LINE_COMPARE] = "Pipe A line compare",
+ [PIPE_A_ODD_FIELD] = "Pipe A odd field",
+ [PIPE_A_EVEN_FIELD] = "Pipe A even field",
+ [PIPE_A_VBLANK] = "Pipe A vblank",
+ [PIPE_B_FIFO_UNDERRUN] = "Pipe B FIFO underrun",
+ [PIPE_B_CRC_ERR] = "Pipe B CRC error",
+ [PIPE_B_CRC_DONE] = "Pipe B CRC done",
+ [PIPE_B_VSYNC] = "Pipe B vsync",
+ [PIPE_B_LINE_COMPARE] = "Pipe B line compare",
+ [PIPE_B_ODD_FIELD] = "Pipe B odd field",
+ [PIPE_B_EVEN_FIELD] = "Pipe B even field",
+ [PIPE_B_VBLANK] = "Pipe B vblank",
+ [PIPE_C_VBLANK] = "Pipe C vblank",
+ [DPST_PHASE_IN] = "DPST phase in event",
+ [DPST_HISTOGRAM] = "DPST histogram event",
+ [GSE] = "GSE",
+ [DP_A_HOTPLUG] = "DP A Hotplug",
+ [AUX_CHANNEL_A] = "AUX Channel A",
+ [PERF_COUNTER] = "Performance counter",
+ [POISON] = "Poison",
+ [GTT_FAULT] = "GTT fault",
+ [PRIMARY_A_FLIP_DONE] = "Primary Plane A flip done",
+ [PRIMARY_B_FLIP_DONE] = "Primary Plane B flip done",
+ [PRIMARY_C_FLIP_DONE] = "Primary Plane C flip done",
+ [SPRITE_A_FLIP_DONE] = "Sprite Plane A flip done",
+ [SPRITE_B_FLIP_DONE] = "Sprite Plane B flip done",
+ [SPRITE_C_FLIP_DONE] = "Sprite Plane C flip done",
+
+ [PCU_THERMAL] = "PCU Thermal Event",
+ [PCU_PCODE2DRIVER_MAILBOX] = "PCU pcode2driver mailbox event",
+
+ [FDI_RX_INTERRUPTS_TRANSCODER_A] = "FDI RX Interrupts Combined A",
+ [AUDIO_CP_CHANGE_TRANSCODER_A] = "Audio CP Change Transcoder A",
+ [AUDIO_CP_REQUEST_TRANSCODER_A] = "Audio CP Request Transcoder A",
+ [FDI_RX_INTERRUPTS_TRANSCODER_B] = "FDI RX Interrupts Combined B",
+ [AUDIO_CP_CHANGE_TRANSCODER_B] = "Audio CP Change Transcoder B",
+ [AUDIO_CP_REQUEST_TRANSCODER_B] = "Audio CP Request Transcoder B",
+ [FDI_RX_INTERRUPTS_TRANSCODER_C] = "FDI RX Interrupts Combined C",
+ [AUDIO_CP_CHANGE_TRANSCODER_C] = "Audio CP Change Transcoder C",
+ [AUDIO_CP_REQUEST_TRANSCODER_C] = "Audio CP Request Transcoder C",
+ [ERR_AND_DBG] = "South Error and Debug Interupts Combined",
+ [GMBUS] = "Gmbus",
+ [SDVO_B_HOTPLUG] = "SDVO B hotplug",
+ [CRT_HOTPLUG] = "CRT Hotplug",
+ [DP_B_HOTPLUG] = "DisplayPort/HDMI/DVI B Hotplug",
+ [DP_C_HOTPLUG] = "DisplayPort/HDMI/DVI C Hotplug",
+ [DP_D_HOTPLUG] = "DisplayPort/HDMI/DVI D Hotplug",
+ [AUX_CHANNEL_B] = "AUX Channel B",
+ [AUX_CHANNEL_C] = "AUX Channel C",
+ [AUX_CHANNEL_D] = "AUX Channel D",
+ [AUDIO_POWER_STATE_CHANGE_B] = "Audio Power State change Port B",
+ [AUDIO_POWER_STATE_CHANGE_C] = "Audio Power State change Port C",
+ [AUDIO_POWER_STATE_CHANGE_D] = "Audio Power State change Port D",
+
+ [INTEL_GVT_EVENT_RESERVED] = "RESERVED EVENTS!!!",
+};
+
+static inline struct intel_gvt_irq_info *regbase_to_irq_info(
+ struct intel_gvt *gvt,
+ unsigned int reg)
+{
+ struct intel_gvt_irq *irq = &gvt->irq;
+ int i;
+
+ for_each_set_bit(i, irq->irq_info_bitmap, INTEL_GVT_IRQ_INFO_MAX) {
+ if (i915_mmio_reg_offset(irq->info[i]->reg_base) == reg)
+ return irq->info[i];
+ }
+
+ return NULL;
+}
+
+/**
+ * intel_vgpu_reg_imr_handler - Generic IMR register emulation write handler
+ * @vgpu: a vGPU
+ * @reg: register offset written by guest
+ * @p_data: register data written by guest
+ * @bytes: register data length
+ *
+ * This function is used to emulate the generic IMR register bit change
+ * behavior.
+ *
+ * Returns:
+ * Zero on success, negative error code if failed.
+ *
+ */
+int intel_vgpu_reg_imr_handler(struct intel_vgpu *vgpu,
+ unsigned int reg, void *p_data, unsigned int bytes)
+{
+ struct intel_gvt *gvt = vgpu->gvt;
+ struct intel_gvt_irq_ops *ops = gvt->irq.ops;
+ u32 changed, masked, unmasked;
+ u32 imr = *(u32 *)p_data;
+
+ gvt_dbg_irq("write IMR %x with val %x\n",
+ reg, imr);
+
+ gvt_dbg_irq("old vIMR %x\n", vgpu_vreg(vgpu, reg));
+
+ /* figure out newly masked/unmasked bits */
+ changed = vgpu_vreg(vgpu, reg) ^ imr;
+ masked = (vgpu_vreg(vgpu, reg) & changed) ^ changed;
+ unmasked = masked ^ changed;
+
+ gvt_dbg_irq("changed %x, masked %x, unmasked %x\n",
+ changed, masked, unmasked);
+
+ vgpu_vreg(vgpu, reg) = imr;
+
+ ops->check_pending_irq(vgpu);
+ gvt_dbg_irq("IRQ: new vIMR %x\n", vgpu_vreg(vgpu, reg));
+ return 0;
+}
+
+/**
+ * intel_vgpu_reg_master_irq_handler - master IRQ write emulation handler
+ * @vgpu: a vGPU
+ * @reg: register offset written by guest
+ * @p_data: register data written by guest
+ * @bytes: register data length
+ *
+ * This function is used to emulate the master IRQ register on gen8+.
+ *
+ * Returns:
+ * Zero on success, negative error code if failed.
+ *
+ */
+int intel_vgpu_reg_master_irq_handler(struct intel_vgpu *vgpu,
+ unsigned int reg, void *p_data, unsigned int bytes)
+{
+ struct intel_gvt *gvt = vgpu->gvt;
+ struct intel_gvt_irq_ops *ops = gvt->irq.ops;
+ u32 changed, enabled, disabled;
+ u32 ier = *(u32 *)p_data;
+ u32 virtual_ier = vgpu_vreg(vgpu, reg);
+
+ gvt_dbg_irq("write master irq reg %x with val %x\n",
+ reg, ier);
+
+ gvt_dbg_irq("old vreg %x\n", vgpu_vreg(vgpu, reg));
+
+ /*
+ * GEN8_MASTER_IRQ is a special irq register,
+ * only bit 31 is allowed to be modified
+ * and treated as an IER bit.
+ */
+ ier &= GEN8_MASTER_IRQ_CONTROL;
+ virtual_ier &= GEN8_MASTER_IRQ_CONTROL;
+ vgpu_vreg(vgpu, reg) &= ~GEN8_MASTER_IRQ_CONTROL;
+ vgpu_vreg(vgpu, reg) |= ier;
+
+ /* figure out newly enabled/disable bits */
+ changed = virtual_ier ^ ier;
+ enabled = (virtual_ier & changed) ^ changed;
+ disabled = enabled ^ changed;
+
+ gvt_dbg_irq("changed %x, enabled %x, disabled %x\n",
+ changed, enabled, disabled);
+
+ ops->check_pending_irq(vgpu);
+ gvt_dbg_irq("new vreg %x\n", vgpu_vreg(vgpu, reg));
+ return 0;
+}
+
+/**
+ * intel_vgpu_reg_ier_handler - Generic IER write emulation handler
+ * @vgpu: a vGPU
+ * @reg: register offset written by guest
+ * @p_data: register data written by guest
+ * @bytes: register data length
+ *
+ * This function is used to emulate the generic IER register behavior.
+ *
+ * Returns:
+ * Zero on success, negative error code if failed.
+ *
+ */
+int intel_vgpu_reg_ier_handler(struct intel_vgpu *vgpu,
+ unsigned int reg, void *p_data, unsigned int bytes)
+{
+ struct intel_gvt *gvt = vgpu->gvt;
+ struct intel_gvt_irq_ops *ops = gvt->irq.ops;
+ struct intel_gvt_irq_info *info;
+ u32 changed, enabled, disabled;
+ u32 ier = *(u32 *)p_data;
+
+ gvt_dbg_irq("write IER %x with val %x\n",
+ reg, ier);
+
+ gvt_dbg_irq("old vIER %x\n", vgpu_vreg(vgpu, reg));
+
+ /* figure out newly enabled/disable bits */
+ changed = vgpu_vreg(vgpu, reg) ^ ier;
+ enabled = (vgpu_vreg(vgpu, reg) & changed) ^ changed;
+ disabled = enabled ^ changed;
+
+ gvt_dbg_irq("changed %x, enabled %x, disabled %x\n",
+ changed, enabled, disabled);
+ vgpu_vreg(vgpu, reg) = ier;
+
+ info = regbase_to_irq_info(gvt, ier_to_regbase(reg));
+ if (WARN_ON(!info))
+ return -EINVAL;
+
+ if (info->has_upstream_irq)
+ update_upstream_irq(vgpu, info);
+
+ ops->check_pending_irq(vgpu);
+ gvt_dbg_irq("new vIER %x\n", vgpu_vreg(vgpu, reg));
+ return 0;
+}
+
+/**
+ * intel_vgpu_reg_iir_handler - Generic IIR write emulation handler
+ * @vgpu: a vGPU
+ * @reg: register offset written by guest
+ * @p_data: register data written by guest
+ * @bytes: register data length
+ *
+ * This function is used to emulate the generic IIR register behavior.
+ *
+ * Returns:
+ * Zero on success, negative error code if failed.
+ *
+ */
+int intel_vgpu_reg_iir_handler(struct intel_vgpu *vgpu, unsigned int reg,
+ void *p_data, unsigned int bytes)
+{
+ struct intel_gvt_irq_info *info = regbase_to_irq_info(vgpu->gvt,
+ iir_to_regbase(reg));
+ u32 iir = *(u32 *)p_data;
+
+ gvt_dbg_irq("write IIR %x with val %x\n", reg, iir);
+
+ if (WARN_ON(!info))
+ return -EINVAL;
+
+ vgpu_vreg(vgpu, reg) &= ~iir;
+
+ if (info->has_upstream_irq)
+ update_upstream_irq(vgpu, info);
+ return 0;
+}
+
+static struct intel_gvt_irq_map gen8_irq_map[] = {
+ { INTEL_GVT_IRQ_INFO_MASTER, 0, INTEL_GVT_IRQ_INFO_GT0, 0xffff },
+ { INTEL_GVT_IRQ_INFO_MASTER, 1, INTEL_GVT_IRQ_INFO_GT0, 0xffff0000 },
+ { INTEL_GVT_IRQ_INFO_MASTER, 2, INTEL_GVT_IRQ_INFO_GT1, 0xffff },
+ { INTEL_GVT_IRQ_INFO_MASTER, 3, INTEL_GVT_IRQ_INFO_GT1, 0xffff0000 },
+ { INTEL_GVT_IRQ_INFO_MASTER, 4, INTEL_GVT_IRQ_INFO_GT2, 0xffff },
+ { INTEL_GVT_IRQ_INFO_MASTER, 6, INTEL_GVT_IRQ_INFO_GT3, 0xffff },
+ { INTEL_GVT_IRQ_INFO_MASTER, 16, INTEL_GVT_IRQ_INFO_DE_PIPE_A, ~0 },
+ { INTEL_GVT_IRQ_INFO_MASTER, 17, INTEL_GVT_IRQ_INFO_DE_PIPE_B, ~0 },
+ { INTEL_GVT_IRQ_INFO_MASTER, 18, INTEL_GVT_IRQ_INFO_DE_PIPE_C, ~0 },
+ { INTEL_GVT_IRQ_INFO_MASTER, 20, INTEL_GVT_IRQ_INFO_DE_PORT, ~0 },
+ { INTEL_GVT_IRQ_INFO_MASTER, 22, INTEL_GVT_IRQ_INFO_DE_MISC, ~0 },
+ { INTEL_GVT_IRQ_INFO_MASTER, 23, INTEL_GVT_IRQ_INFO_PCH, ~0 },
+ { INTEL_GVT_IRQ_INFO_MASTER, 30, INTEL_GVT_IRQ_INFO_PCU, ~0 },
+ { -1, -1, ~0 },
+};
+
+static void update_upstream_irq(struct intel_vgpu *vgpu,
+ struct intel_gvt_irq_info *info)
+{
+ struct intel_gvt_irq *irq = &vgpu->gvt->irq;
+ struct intel_gvt_irq_map *map = irq->irq_map;
+ struct intel_gvt_irq_info *up_irq_info = NULL;
+ u32 set_bits = 0;
+ u32 clear_bits = 0;
+ int bit;
+ u32 val = vgpu_vreg(vgpu,
+ regbase_to_iir(i915_mmio_reg_offset(info->reg_base)))
+ & vgpu_vreg(vgpu,
+ regbase_to_ier(i915_mmio_reg_offset(info->reg_base)));
+
+ if (!info->has_upstream_irq)
+ return;
+
+ for (map = irq->irq_map; map->up_irq_bit != -1; map++) {
+ if (info->group != map->down_irq_group)
+ continue;
+
+ if (!up_irq_info)
+ up_irq_info = irq->info[map->up_irq_group];
+ else
+ WARN_ON(up_irq_info != irq->info[map->up_irq_group]);
+
+ bit = map->up_irq_bit;
+
+ if (val & map->down_irq_bitmask)
+ set_bits |= (1 << bit);
+ else
+ clear_bits |= (1 << bit);
+ }
+
+ WARN_ON(!up_irq_info);
+
+ if (up_irq_info->group == INTEL_GVT_IRQ_INFO_MASTER) {
+ u32 isr = i915_mmio_reg_offset(up_irq_info->reg_base);
+
+ vgpu_vreg(vgpu, isr) &= ~clear_bits;
+ vgpu_vreg(vgpu, isr) |= set_bits;
+ } else {
+ u32 iir = regbase_to_iir(
+ i915_mmio_reg_offset(up_irq_info->reg_base));
+ u32 imr = regbase_to_imr(
+ i915_mmio_reg_offset(up_irq_info->reg_base));
+
+ vgpu_vreg(vgpu, iir) |= (set_bits & ~vgpu_vreg(vgpu, imr));
+ }
+
+ if (up_irq_info->has_upstream_irq)
+ update_upstream_irq(vgpu, up_irq_info);
+}
+
+static void init_irq_map(struct intel_gvt_irq *irq)
+{
+ struct intel_gvt_irq_map *map;
+ struct intel_gvt_irq_info *up_info, *down_info;
+ int up_bit;
+
+ for (map = irq->irq_map; map->up_irq_bit != -1; map++) {
+ up_info = irq->info[map->up_irq_group];
+ up_bit = map->up_irq_bit;
+ down_info = irq->info[map->down_irq_group];
+
+ set_bit(up_bit, up_info->downstream_irq_bitmap);
+ down_info->has_upstream_irq = true;
+
+ gvt_dbg_irq("[up] grp %d bit %d -> [down] grp %d bitmask %x\n",
+ up_info->group, up_bit,
+ down_info->group, map->down_irq_bitmask);
+ }
+}
+
+/* =======================vEvent injection===================== */
+static int inject_virtual_interrupt(struct intel_vgpu *vgpu)
+{
+ return intel_gvt_hypervisor_inject_msi(vgpu);
+}
+
+static void propagate_event(struct intel_gvt_irq *irq,
+ enum intel_gvt_event_type event, struct intel_vgpu *vgpu)
+{
+ struct intel_gvt_irq_info *info;
+ unsigned int reg_base;
+ int bit;
+
+ info = get_irq_info(irq, event);
+ if (WARN_ON(!info))
+ return;
+
+ reg_base = i915_mmio_reg_offset(info->reg_base);
+ bit = irq->events[event].bit;
+
+ if (!test_bit(bit, (void *)&vgpu_vreg(vgpu,
+ regbase_to_imr(reg_base)))) {
+ gvt_dbg_irq("set bit (%d) for (%s) for vgpu (%d)\n",
+ bit, irq_name[event], vgpu->id);
+ set_bit(bit, (void *)&vgpu_vreg(vgpu,
+ regbase_to_iir(reg_base)));
+ }
+}
+
+/* =======================vEvent Handlers===================== */
+static void handle_default_event_virt(struct intel_gvt_irq *irq,
+ enum intel_gvt_event_type event, struct intel_vgpu *vgpu)
+{
+ if (!vgpu->irq.irq_warn_once[event]) {
+ gvt_dbg_core("vgpu%d: IRQ receive event %d (%s)\n",
+ vgpu->id, event, irq_name[event]);
+ vgpu->irq.irq_warn_once[event] = true;
+ }
+ propagate_event(irq, event, vgpu);
+}
+
+/* =====================GEN specific logic======================= */
+/* GEN8 interrupt routines. */
+
+#define DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(regname, regbase) \
+static struct intel_gvt_irq_info gen8_##regname##_info = { \
+ .name = #regname"-IRQ", \
+ .reg_base = (regbase), \
+ .bit_to_event = {[0 ... INTEL_GVT_IRQ_BITWIDTH-1] = \
+ INTEL_GVT_EVENT_RESERVED}, \
+}
+
+DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(gt0, GEN8_GT_ISR(0));
+DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(gt1, GEN8_GT_ISR(1));
+DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(gt2, GEN8_GT_ISR(2));
+DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(gt3, GEN8_GT_ISR(3));
+DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(de_pipe_a, GEN8_DE_PIPE_ISR(PIPE_A));
+DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(de_pipe_b, GEN8_DE_PIPE_ISR(PIPE_B));
+DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(de_pipe_c, GEN8_DE_PIPE_ISR(PIPE_C));
+DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(de_port, GEN8_DE_PORT_ISR);
+DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(de_misc, GEN8_DE_MISC_ISR);
+DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(pcu, GEN8_PCU_ISR);
+DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(master, GEN8_MASTER_IRQ);
+
+static struct intel_gvt_irq_info gvt_base_pch_info = {
+ .name = "PCH-IRQ",
+ .reg_base = SDEISR,
+ .bit_to_event = {[0 ... INTEL_GVT_IRQ_BITWIDTH-1] =
+ INTEL_GVT_EVENT_RESERVED},
+};
+
+static void gen8_check_pending_irq(struct intel_vgpu *vgpu)
+{
+ struct intel_gvt_irq *irq = &vgpu->gvt->irq;
+ int i;
+
+ if (!(vgpu_vreg(vgpu, i915_mmio_reg_offset(GEN8_MASTER_IRQ)) &
+ GEN8_MASTER_IRQ_CONTROL))
+ return;
+
+ for_each_set_bit(i, irq->irq_info_bitmap, INTEL_GVT_IRQ_INFO_MAX) {
+ struct intel_gvt_irq_info *info = irq->info[i];
+ u32 reg_base;
+
+ if (!info->has_upstream_irq)
+ continue;
+
+ reg_base = i915_mmio_reg_offset(info->reg_base);
+ if ((vgpu_vreg(vgpu, regbase_to_iir(reg_base))
+ & vgpu_vreg(vgpu, regbase_to_ier(reg_base))))
+ update_upstream_irq(vgpu, info);
+ }
+
+ if (vgpu_vreg(vgpu, i915_mmio_reg_offset(GEN8_MASTER_IRQ))
+ & ~GEN8_MASTER_IRQ_CONTROL)
+ inject_virtual_interrupt(vgpu);
+}
+
+static void gen8_init_irq(
+ struct intel_gvt_irq *irq)
+{
+ struct intel_gvt *gvt = irq_to_gvt(irq);
+
+#define SET_BIT_INFO(s, b, e, i) \
+ do { \
+ s->events[e].bit = b; \
+ s->events[e].info = s->info[i]; \
+ s->info[i]->bit_to_event[b] = e;\
+ } while (0)
+
+#define SET_IRQ_GROUP(s, g, i) \
+ do { \
+ s->info[g] = i; \
+ (i)->group = g; \
+ set_bit(g, s->irq_info_bitmap); \
+ } while (0)
+
+ SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_MASTER, &gen8_master_info);
+ SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_GT0, &gen8_gt0_info);
+ SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_GT1, &gen8_gt1_info);
+ SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_GT2, &gen8_gt2_info);
+ SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_GT3, &gen8_gt3_info);
+ SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_DE_PIPE_A, &gen8_de_pipe_a_info);
+ SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_DE_PIPE_B, &gen8_de_pipe_b_info);
+ SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_DE_PIPE_C, &gen8_de_pipe_c_info);
+ SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_DE_PORT, &gen8_de_port_info);
+ SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_DE_MISC, &gen8_de_misc_info);
+ SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_PCU, &gen8_pcu_info);
+ SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_PCH, &gvt_base_pch_info);
+
+ /* GEN8 level 2 interrupts. */
+
+ /* GEN8 interrupt GT0 events */
+ SET_BIT_INFO(irq, 0, RCS_MI_USER_INTERRUPT, INTEL_GVT_IRQ_INFO_GT0);
+ SET_BIT_INFO(irq, 4, RCS_PIPE_CONTROL, INTEL_GVT_IRQ_INFO_GT0);
+ SET_BIT_INFO(irq, 8, RCS_AS_CONTEXT_SWITCH, INTEL_GVT_IRQ_INFO_GT0);
+
+ SET_BIT_INFO(irq, 16, BCS_MI_USER_INTERRUPT, INTEL_GVT_IRQ_INFO_GT0);
+ SET_BIT_INFO(irq, 20, BCS_MI_FLUSH_DW, INTEL_GVT_IRQ_INFO_GT0);
+ SET_BIT_INFO(irq, 24, BCS_AS_CONTEXT_SWITCH, INTEL_GVT_IRQ_INFO_GT0);
+
+ /* GEN8 interrupt GT1 events */
+ SET_BIT_INFO(irq, 0, VCS_MI_USER_INTERRUPT, INTEL_GVT_IRQ_INFO_GT1);
+ SET_BIT_INFO(irq, 4, VCS_MI_FLUSH_DW, INTEL_GVT_IRQ_INFO_GT1);
+ SET_BIT_INFO(irq, 8, VCS_AS_CONTEXT_SWITCH, INTEL_GVT_IRQ_INFO_GT1);
+
+ if (HAS_BSD2(gvt->dev_priv)) {
+ SET_BIT_INFO(irq, 16, VCS2_MI_USER_INTERRUPT,
+ INTEL_GVT_IRQ_INFO_GT1);
+ SET_BIT_INFO(irq, 20, VCS2_MI_FLUSH_DW,
+ INTEL_GVT_IRQ_INFO_GT1);
+ SET_BIT_INFO(irq, 24, VCS2_AS_CONTEXT_SWITCH,
+ INTEL_GVT_IRQ_INFO_GT1);
+ }
+
+ /* GEN8 interrupt GT3 events */
+ SET_BIT_INFO(irq, 0, VECS_MI_USER_INTERRUPT, INTEL_GVT_IRQ_INFO_GT3);
+ SET_BIT_INFO(irq, 4, VECS_MI_FLUSH_DW, INTEL_GVT_IRQ_INFO_GT3);
+ SET_BIT_INFO(irq, 8, VECS_AS_CONTEXT_SWITCH, INTEL_GVT_IRQ_INFO_GT3);
+
+ SET_BIT_INFO(irq, 0, PIPE_A_VBLANK, INTEL_GVT_IRQ_INFO_DE_PIPE_A);
+ SET_BIT_INFO(irq, 0, PIPE_B_VBLANK, INTEL_GVT_IRQ_INFO_DE_PIPE_B);
+ SET_BIT_INFO(irq, 0, PIPE_C_VBLANK, INTEL_GVT_IRQ_INFO_DE_PIPE_C);
+
+ /* GEN8 interrupt DE PORT events */
+ SET_BIT_INFO(irq, 0, AUX_CHANNEL_A, INTEL_GVT_IRQ_INFO_DE_PORT);
+ SET_BIT_INFO(irq, 3, DP_A_HOTPLUG, INTEL_GVT_IRQ_INFO_DE_PORT);
+
+ /* GEN8 interrupt DE MISC events */
+ SET_BIT_INFO(irq, 0, GSE, INTEL_GVT_IRQ_INFO_DE_MISC);
+
+ /* PCH events */
+ SET_BIT_INFO(irq, 17, GMBUS, INTEL_GVT_IRQ_INFO_PCH);
+ SET_BIT_INFO(irq, 19, CRT_HOTPLUG, INTEL_GVT_IRQ_INFO_PCH);
+ SET_BIT_INFO(irq, 21, DP_B_HOTPLUG, INTEL_GVT_IRQ_INFO_PCH);
+ SET_BIT_INFO(irq, 22, DP_C_HOTPLUG, INTEL_GVT_IRQ_INFO_PCH);
+ SET_BIT_INFO(irq, 23, DP_D_HOTPLUG, INTEL_GVT_IRQ_INFO_PCH);
+
+ if (IS_BROADWELL(gvt->dev_priv)) {
+ SET_BIT_INFO(irq, 25, AUX_CHANNEL_B, INTEL_GVT_IRQ_INFO_PCH);
+ SET_BIT_INFO(irq, 26, AUX_CHANNEL_C, INTEL_GVT_IRQ_INFO_PCH);
+ SET_BIT_INFO(irq, 27, AUX_CHANNEL_D, INTEL_GVT_IRQ_INFO_PCH);
+
+ SET_BIT_INFO(irq, 4, PRIMARY_A_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_A);
+ SET_BIT_INFO(irq, 5, SPRITE_A_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_A);
+
+ SET_BIT_INFO(irq, 4, PRIMARY_B_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_B);
+ SET_BIT_INFO(irq, 5, SPRITE_B_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_B);
+
+ SET_BIT_INFO(irq, 4, PRIMARY_C_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_C);
+ SET_BIT_INFO(irq, 5, SPRITE_C_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_C);
+ } else if (IS_SKYLAKE(gvt->dev_priv)) {
+ SET_BIT_INFO(irq, 25, AUX_CHANNEL_B, INTEL_GVT_IRQ_INFO_DE_PORT);
+ SET_BIT_INFO(irq, 26, AUX_CHANNEL_C, INTEL_GVT_IRQ_INFO_DE_PORT);
+ SET_BIT_INFO(irq, 27, AUX_CHANNEL_D, INTEL_GVT_IRQ_INFO_DE_PORT);
+
+ SET_BIT_INFO(irq, 3, PRIMARY_A_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_A);
+ SET_BIT_INFO(irq, 3, PRIMARY_B_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_B);
+ SET_BIT_INFO(irq, 3, PRIMARY_C_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_C);
+ }
+
+ /* GEN8 interrupt PCU events */
+ SET_BIT_INFO(irq, 24, PCU_THERMAL, INTEL_GVT_IRQ_INFO_PCU);
+ SET_BIT_INFO(irq, 25, PCU_PCODE2DRIVER_MAILBOX, INTEL_GVT_IRQ_INFO_PCU);
+}
+
+static struct intel_gvt_irq_ops gen8_irq_ops = {
+ .init_irq = gen8_init_irq,
+ .check_pending_irq = gen8_check_pending_irq,
+};
+
+/**
+ * intel_vgpu_trigger_virtual_event - Trigger a virtual event for a vGPU
+ * @vgpu: a vGPU
+ * @event: interrupt event
+ *
+ * This function is used to trigger a virtual interrupt event for vGPU.
+ * The caller provides the event to be triggered, the framework itself
+ * will emulate the IRQ register bit change.
+ *
+ */
+void intel_vgpu_trigger_virtual_event(struct intel_vgpu *vgpu,
+ enum intel_gvt_event_type event)
+{
+ struct intel_gvt *gvt = vgpu->gvt;
+ struct intel_gvt_irq *irq = &gvt->irq;
+ gvt_event_virt_handler_t handler;
+ struct intel_gvt_irq_ops *ops = gvt->irq.ops;
+
+ handler = get_event_virt_handler(irq, event);
+ WARN_ON(!handler);
+
+ handler(irq, event, vgpu);
+
+ ops->check_pending_irq(vgpu);
+}
+
+static void init_events(
+ struct intel_gvt_irq *irq)
+{
+ int i;
+
+ for (i = 0; i < INTEL_GVT_EVENT_MAX; i++) {
+ irq->events[i].info = NULL;
+ irq->events[i].v_handler = handle_default_event_virt;
+ }
+}
+
+/**
+ * intel_gvt_clean_irq - clean up GVT-g IRQ emulation subsystem
+ * @gvt: a GVT device
+ *
+ * This function is called at driver unloading stage, to clean up GVT-g IRQ
+ * emulation subsystem.
+ *
+ */
+void intel_gvt_clean_irq(struct intel_gvt *gvt)
+{
+}
+
+/**
+ * intel_gvt_init_irq - initialize GVT-g IRQ emulation subsystem
+ * @gvt: a GVT device
+ *
+ * This function is called at driver loading stage, to initialize the GVT-g IRQ
+ * emulation subsystem.
+ *
+ * Returns:
+ * Zero on success, negative error code if failed.
+ */
+int intel_gvt_init_irq(struct intel_gvt *gvt)
+{
+ struct intel_gvt_irq *irq = &gvt->irq;
+
+ gvt_dbg_core("init irq framework\n");
+
+ if (IS_BROADWELL(gvt->dev_priv) || IS_SKYLAKE(gvt->dev_priv)) {
+ irq->ops = &gen8_irq_ops;
+ irq->irq_map = gen8_irq_map;
+ } else {
+ WARN_ON(1);
+ return -ENODEV;
+ }
+
+ /* common event initialization */
+ init_events(irq);
+
+ /* gen specific initialization */
+ irq->ops->init_irq(irq);
+
+ init_irq_map(irq);
+ return 0;
+}