drm/i915/gvt: Handle MMIO GEN8_GAMW_ECO_DEV_RW_IA for 64K GTT

The register RENDER_HWS_PGA_GEN7 is renamed to GEN8_GAMW_ECO_DEV_RW_IA
from GEN8 which can control IPS enabling.

v3: MMIO control for IPS is not removed from gen9 but gen10 (Matthew Auld)
v2: IPS of all engines must be enabled together for gen9.

Signed-off-by: Changbin Du <changbin.du@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>

diff --git a/drivers/gpu/drm/i915/gvt/handlers.c b/drivers/gpu/drm/i915/gvt/handlers.c
index 0bc0c5418adb83c5868f051de0ba13bdb62db04f..17f56fc20613f21be90cd7f7381ead9638251d0d 100644 (file)
--- a/drivers/gpu/drm/i915/gvt/handlers.c
+++ b/drivers/gpu/drm/i915/gvt/handlers.c
@@ -210,6 +210,31 @@ static int sanitize_fence_mmio_access(struct intel_vgpu *vgpu,
        return 0;
 }
 
+static int gamw_echo_dev_rw_ia_write(struct intel_vgpu *vgpu,
+               unsigned int offset, void *p_data, unsigned int bytes)
+{
+       u32 ips = (*(u32 *)p_data) & GAMW_ECO_ENABLE_64K_IPS_FIELD;
+
+       if (INTEL_GEN(vgpu->gvt->dev_priv) <= 10) {
+               if (ips == GAMW_ECO_ENABLE_64K_IPS_FIELD)
+                       gvt_dbg_core("vgpu%d: ips enabled\n", vgpu->id);
+               else if (!ips)
+                       gvt_dbg_core("vgpu%d: ips disabled\n", vgpu->id);
+               else {
+                       /* All engines must be enabled together for vGPU,
+                        * since we don't know which engine the ppgtt will
+                        * bind to when shadowing.
+                        */
+                       gvt_vgpu_err("Unsupported IPS setting %x, cannot enable 64K gtt.\n",
+                                    ips);
+                       return -EINVAL;
+               }
+       }
+
+       write_vreg(vgpu, offset, p_data, bytes);
+       return 0;
+}
+
 static int fence_mmio_read(struct intel_vgpu *vgpu, unsigned int off,
                void *p_data, unsigned int bytes)
 {
@@ -1769,7 +1794,9 @@ static int init_generic_mmio_info(struct intel_gvt *gvt)
 
        MMIO_RING_DFH(RING_HWSTAM, D_ALL, F_CMD_ACCESS, NULL, NULL);
 
-       MMIO_GM_RDR(RENDER_HWS_PGA_GEN7, D_ALL, NULL, NULL);
+       MMIO_DH(GEN8_GAMW_ECO_DEV_RW_IA, D_BDW_PLUS, NULL,
+               gamw_echo_dev_rw_ia_write);
+
        MMIO_GM_RDR(BSD_HWS_PGA_GEN7, D_ALL, NULL, NULL);
        MMIO_GM_RDR(BLT_HWS_PGA_GEN7, D_ALL, NULL, NULL);
        MMIO_GM_RDR(VEBOX_HWS_PGA_GEN7, D_ALL, NULL, NULL);