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path: root/drivers/gpu/drm/i915/gvt/mmio.c
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Diffstat (limited to 'drivers/gpu/drm/i915/gvt/mmio.c')
-rw-r--r--drivers/gpu/drm/i915/gvt/mmio.c318
1 files changed, 318 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gvt/mmio.c b/drivers/gpu/drm/i915/gvt/mmio.c
new file mode 100644
index 000000000..9bb9a85c9
--- /dev/null
+++ b/drivers/gpu/drm/i915/gvt/mmio.c
@@ -0,0 +1,318 @@
+/*
+ * 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>
+ *
+ */
+
+#include "i915_drv.h"
+#include "gvt.h"
+
+/**
+ * intel_vgpu_gpa_to_mmio_offset - translate a GPA to MMIO offset
+ * @vgpu: a vGPU
+ *
+ * Returns:
+ * Zero on success, negative error code if failed
+ */
+int intel_vgpu_gpa_to_mmio_offset(struct intel_vgpu *vgpu, u64 gpa)
+{
+ u64 gttmmio_gpa = intel_vgpu_get_bar_gpa(vgpu, PCI_BASE_ADDRESS_0);
+ return gpa - gttmmio_gpa;
+}
+
+#define reg_is_mmio(gvt, reg) \
+ (reg >= 0 && reg < gvt->device_info.mmio_size)
+
+#define reg_is_gtt(gvt, reg) \
+ (reg >= gvt->device_info.gtt_start_offset \
+ && reg < gvt->device_info.gtt_start_offset + gvt_ggtt_sz(gvt))
+
+static void failsafe_emulate_mmio_rw(struct intel_vgpu *vgpu, uint64_t pa,
+ void *p_data, unsigned int bytes, bool read)
+{
+ struct intel_gvt *gvt = NULL;
+ void *pt = NULL;
+ unsigned int offset = 0;
+
+ if (!vgpu || !p_data)
+ return;
+
+ gvt = vgpu->gvt;
+ mutex_lock(&vgpu->vgpu_lock);
+ offset = intel_vgpu_gpa_to_mmio_offset(vgpu, pa);
+ if (reg_is_mmio(gvt, offset)) {
+ if (read)
+ intel_vgpu_default_mmio_read(vgpu, offset, p_data,
+ bytes);
+ else
+ intel_vgpu_default_mmio_write(vgpu, offset, p_data,
+ bytes);
+ } else if (reg_is_gtt(gvt, offset)) {
+ offset -= gvt->device_info.gtt_start_offset;
+ pt = vgpu->gtt.ggtt_mm->ggtt_mm.virtual_ggtt + offset;
+ if (read)
+ memcpy(p_data, pt, bytes);
+ else
+ memcpy(pt, p_data, bytes);
+
+ }
+ mutex_unlock(&vgpu->vgpu_lock);
+}
+
+/**
+ * intel_vgpu_emulate_mmio_read - emulate MMIO read
+ * @vgpu: a vGPU
+ * @pa: guest physical address
+ * @p_data: data return buffer
+ * @bytes: access data length
+ *
+ * Returns:
+ * Zero on success, negative error code if failed
+ */
+int intel_vgpu_emulate_mmio_read(struct intel_vgpu *vgpu, uint64_t pa,
+ void *p_data, unsigned int bytes)
+{
+ struct intel_gvt *gvt = vgpu->gvt;
+ unsigned int offset = 0;
+ int ret = -EINVAL;
+
+ if (vgpu->failsafe) {
+ failsafe_emulate_mmio_rw(vgpu, pa, p_data, bytes, true);
+ return 0;
+ }
+ mutex_lock(&vgpu->vgpu_lock);
+
+ offset = intel_vgpu_gpa_to_mmio_offset(vgpu, pa);
+
+ if (WARN_ON(bytes > 8))
+ goto err;
+
+ if (reg_is_gtt(gvt, offset)) {
+ if (WARN_ON(!IS_ALIGNED(offset, 4) && !IS_ALIGNED(offset, 8)))
+ goto err;
+ if (WARN_ON(bytes != 4 && bytes != 8))
+ goto err;
+ if (WARN_ON(!reg_is_gtt(gvt, offset + bytes - 1)))
+ goto err;
+
+ ret = intel_vgpu_emulate_ggtt_mmio_read(vgpu, offset,
+ p_data, bytes);
+ if (ret)
+ goto err;
+ goto out;
+ }
+
+ if (WARN_ON_ONCE(!reg_is_mmio(gvt, offset))) {
+ ret = intel_gvt_hypervisor_read_gpa(vgpu, pa, p_data, bytes);
+ goto out;
+ }
+
+ if (WARN_ON(!reg_is_mmio(gvt, offset + bytes - 1)))
+ goto err;
+
+ if (!intel_gvt_mmio_is_unalign(gvt, offset)) {
+ if (WARN_ON(!IS_ALIGNED(offset, bytes)))
+ goto err;
+ }
+
+ ret = intel_vgpu_mmio_reg_rw(vgpu, offset, p_data, bytes, true);
+ if (ret < 0)
+ goto err;
+
+ intel_gvt_mmio_set_accessed(gvt, offset);
+ ret = 0;
+ goto out;
+
+err:
+ gvt_vgpu_err("fail to emulate MMIO read %08x len %d\n",
+ offset, bytes);
+out:
+ mutex_unlock(&vgpu->vgpu_lock);
+ return ret;
+}
+
+/**
+ * intel_vgpu_emulate_mmio_write - emulate MMIO write
+ * @vgpu: a vGPU
+ * @pa: guest physical address
+ * @p_data: write data buffer
+ * @bytes: access data length
+ *
+ * Returns:
+ * Zero on success, negative error code if failed
+ */
+int intel_vgpu_emulate_mmio_write(struct intel_vgpu *vgpu, uint64_t pa,
+ void *p_data, unsigned int bytes)
+{
+ struct intel_gvt *gvt = vgpu->gvt;
+ unsigned int offset = 0;
+ int ret = -EINVAL;
+
+ if (vgpu->failsafe) {
+ failsafe_emulate_mmio_rw(vgpu, pa, p_data, bytes, false);
+ return 0;
+ }
+
+ mutex_lock(&vgpu->vgpu_lock);
+
+ offset = intel_vgpu_gpa_to_mmio_offset(vgpu, pa);
+
+ if (WARN_ON(bytes > 8))
+ goto err;
+
+ if (reg_is_gtt(gvt, offset)) {
+ if (WARN_ON(!IS_ALIGNED(offset, 4) && !IS_ALIGNED(offset, 8)))
+ goto err;
+ if (WARN_ON(bytes != 4 && bytes != 8))
+ goto err;
+ if (WARN_ON(!reg_is_gtt(gvt, offset + bytes - 1)))
+ goto err;
+
+ ret = intel_vgpu_emulate_ggtt_mmio_write(vgpu, offset,
+ p_data, bytes);
+ if (ret)
+ goto err;
+ goto out;
+ }
+
+ if (WARN_ON_ONCE(!reg_is_mmio(gvt, offset))) {
+ ret = intel_gvt_hypervisor_write_gpa(vgpu, pa, p_data, bytes);
+ goto out;
+ }
+
+ ret = intel_vgpu_mmio_reg_rw(vgpu, offset, p_data, bytes, false);
+ if (ret < 0)
+ goto err;
+
+ intel_gvt_mmio_set_accessed(gvt, offset);
+ ret = 0;
+ goto out;
+err:
+ gvt_vgpu_err("fail to emulate MMIO write %08x len %d\n", offset,
+ bytes);
+out:
+ mutex_unlock(&vgpu->vgpu_lock);
+ return ret;
+}
+
+
+/**
+ * intel_vgpu_reset_mmio - reset virtual MMIO space
+ * @vgpu: a vGPU
+ *
+ */
+void intel_vgpu_reset_mmio(struct intel_vgpu *vgpu, bool dmlr)
+{
+ struct intel_gvt *gvt = vgpu->gvt;
+ const struct intel_gvt_device_info *info = &gvt->device_info;
+ void *mmio = gvt->firmware.mmio;
+
+ if (dmlr) {
+ memcpy(vgpu->mmio.vreg, mmio, info->mmio_size);
+ memcpy(vgpu->mmio.sreg, mmio, info->mmio_size);
+
+ vgpu_vreg_t(vgpu, GEN6_GT_THREAD_STATUS_REG) = 0;
+
+ /* set the bit 0:2(Core C-State ) to C0 */
+ vgpu_vreg_t(vgpu, GEN6_GT_CORE_STATUS) = 0;
+
+ if (IS_BROXTON(vgpu->gvt->dev_priv)) {
+ vgpu_vreg_t(vgpu, BXT_P_CR_GT_DISP_PWRON) &=
+ ~(BIT(0) | BIT(1));
+ vgpu_vreg_t(vgpu, BXT_PORT_CL1CM_DW0(DPIO_PHY0)) &=
+ ~PHY_POWER_GOOD;
+ vgpu_vreg_t(vgpu, BXT_PORT_CL1CM_DW0(DPIO_PHY1)) &=
+ ~PHY_POWER_GOOD;
+ vgpu_vreg_t(vgpu, BXT_PHY_CTL_FAMILY(DPIO_PHY0)) &=
+ ~BIT(30);
+ vgpu_vreg_t(vgpu, BXT_PHY_CTL_FAMILY(DPIO_PHY1)) &=
+ ~BIT(30);
+ vgpu_vreg_t(vgpu, BXT_PHY_CTL(PORT_A)) &=
+ ~BXT_PHY_LANE_ENABLED;
+ vgpu_vreg_t(vgpu, BXT_PHY_CTL(PORT_A)) |=
+ BXT_PHY_CMNLANE_POWERDOWN_ACK |
+ BXT_PHY_LANE_POWERDOWN_ACK;
+ vgpu_vreg_t(vgpu, BXT_PHY_CTL(PORT_B)) &=
+ ~BXT_PHY_LANE_ENABLED;
+ vgpu_vreg_t(vgpu, BXT_PHY_CTL(PORT_B)) |=
+ BXT_PHY_CMNLANE_POWERDOWN_ACK |
+ BXT_PHY_LANE_POWERDOWN_ACK;
+ vgpu_vreg_t(vgpu, BXT_PHY_CTL(PORT_C)) &=
+ ~BXT_PHY_LANE_ENABLED;
+ vgpu_vreg_t(vgpu, BXT_PHY_CTL(PORT_C)) |=
+ BXT_PHY_CMNLANE_POWERDOWN_ACK |
+ BXT_PHY_LANE_POWERDOWN_ACK;
+ }
+ } else {
+#define GVT_GEN8_MMIO_RESET_OFFSET (0x44200)
+ /* only reset the engine related, so starting with 0x44200
+ * interrupt include DE,display mmio related will not be
+ * touched
+ */
+ memcpy(vgpu->mmio.vreg, mmio, GVT_GEN8_MMIO_RESET_OFFSET);
+ memcpy(vgpu->mmio.sreg, mmio, GVT_GEN8_MMIO_RESET_OFFSET);
+ }
+
+}
+
+/**
+ * intel_vgpu_init_mmio - init MMIO space
+ * @vgpu: a vGPU
+ *
+ * Returns:
+ * Zero on success, negative error code if failed
+ */
+int intel_vgpu_init_mmio(struct intel_vgpu *vgpu)
+{
+ const struct intel_gvt_device_info *info = &vgpu->gvt->device_info;
+
+ vgpu->mmio.vreg = vzalloc(array_size(info->mmio_size, 2));
+ if (!vgpu->mmio.vreg)
+ return -ENOMEM;
+
+ vgpu->mmio.sreg = vgpu->mmio.vreg + info->mmio_size;
+
+ intel_vgpu_reset_mmio(vgpu, true);
+
+ return 0;
+}
+
+/**
+ * intel_vgpu_clean_mmio - clean MMIO space
+ * @vgpu: a vGPU
+ *
+ */
+void intel_vgpu_clean_mmio(struct intel_vgpu *vgpu)
+{
+ vfree(vgpu->mmio.vreg);
+ vgpu->mmio.vreg = vgpu->mmio.sreg = NULL;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-25 01:42:22 +0000