qemu/vfio-pci-Ascend710-change-to-bar2-quirk.patch

From 782040a627d0c3a44a9259a9055610e25c1f44fe Mon Sep 17 00:00:00 2001
From: Wu Binfeng <wubinfeng@huawei.com>
Date: Mon, 25 Apr 2022 15:17:48 +0800
Subject: [PATCH] vfio/pci: Ascend710 change to bar2 quirk

Change Ascend710's quirk regions to bar2 for internal causes.
And support Ascend710 2P format now.
---
 hw/vfio/pci-quirks.c | 64 +++++++++++++++++++++++++++++++++++---------
 1 file changed, 51 insertions(+), 13 deletions(-)

diff --git a/hw/vfio/pci-quirks.c b/hw/vfio/pci-quirks.c
index ba4d8f020c..a71ebe26b4 100644
--- a/hw/vfio/pci-quirks.c
+++ b/hw/vfio/pci-quirks.c
@@ -1213,10 +1213,17 @@ int vfio_pci_igd_opregion_init(VFIOPCIDevice *vdev,
 #define PCI_DEVICE_ID_ASCEND910   0xd801
 #define PCI_DEVICE_ID_ASCEND710   0xd500
 #define PCI_DEVICE_ID_ASCEND310   0xd100
+#define PCI_SUB_DEVICE_ID_ASCEND710_1P_MIN  0x100
+#define PCI_SUB_DEVICE_ID_ASCEND710_1P_MAX  0x10f
+#define PCI_SUB_DEVICE_ID_ASCEND710_2P_MIN  0x110
+#define PCI_SUB_DEVICE_ID_ASCEND710_2P_MAX  0x11f
 #define ASCEND910_XLOADER_SIZE    4
 #define ASCEND910_XLOADER_OFFSET  0x80400
+#define ASCEND710_2P_BASE         (128 * 1024 * 1024)
+#define ASCEND710_1P_DEVNUM       1
+#define ASCEND710_2P_DEVNUM       2
 #define ASCEND710_XLOADER_SIZE    4
-#define ASCEND710_XLOADER_OFFSET  0x20430
+#define ASCEND710_XLOADER_OFFSET  0x100430
 #define ASCEND310_XLOADER_SIZE    4
 #define ASCEND310_XLOADER_OFFSET  0x400
 
@@ -1289,23 +1296,38 @@ static void vfio_probe_ascend910_bar0_quirk(VFIOPCIDevice *vdev, int nr)
     QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
 }
 
-static void vfio_probe_ascend710_bar0_quirk(VFIOPCIDevice *vdev, int nr)
+static void vfio_probe_ascend710_bar2_quirk(VFIOPCIDevice *vdev, int nr)
 {
     VFIOQuirk *quirk;
-    VFIOAscendBarQuirk *bar0_quirk;
+    VFIOAscendBarQuirk *bar2_quirk;
+    int sub_device_id;
+    int devnum = 0;
 
-    if (vdev->vendor_id != PCI_VENDOR_ID_HUAWEI || nr != 0 ||
+    if (vdev->vendor_id != PCI_VENDOR_ID_HUAWEI || nr != 2 ||
         vdev->device_id != PCI_DEVICE_ID_ASCEND710) {
         return;
     }
 
+    sub_device_id = pci_get_word(vdev->pdev.config + PCI_SUBSYSTEM_ID);
+    if (sub_device_id >= PCI_SUB_DEVICE_ID_ASCEND710_1P_MIN &&
+        sub_device_id <= PCI_SUB_DEVICE_ID_ASCEND710_1P_MAX) {
+        devnum = ASCEND710_1P_DEVNUM;
+    } else if (sub_device_id >= PCI_SUB_DEVICE_ID_ASCEND710_2P_MIN &&
+               sub_device_id <= PCI_SUB_DEVICE_ID_ASCEND710_2P_MAX) {
+        devnum = ASCEND710_2P_DEVNUM;
+    }
+
+    if (devnum != ASCEND710_1P_DEVNUM && devnum != ASCEND710_2P_DEVNUM) {
+        return;
+    }
+
     quirk = g_malloc0(sizeof(*quirk));
-    quirk->nr_mem = 1;
+    quirk->nr_mem = devnum;
     quirk->mem = g_new0(MemoryRegion, quirk->nr_mem);
-    bar0_quirk = quirk->data = g_new0(typeof(*bar0_quirk), quirk->nr_mem);
-    bar0_quirk[0].vdev = vdev;
-    bar0_quirk[0].offset = ASCEND710_XLOADER_OFFSET;
-    bar0_quirk[0].bar = nr;
+    bar2_quirk = quirk->data = g_new0(typeof(*bar2_quirk), quirk->nr_mem);
+    bar2_quirk[0].vdev = vdev;
+    bar2_quirk[0].offset = ASCEND710_XLOADER_OFFSET;
+    bar2_quirk[0].bar = nr;
 
     /*
      * intercept w/r to the xloader-updating register,
@@ -1313,12 +1335,28 @@ static void vfio_probe_ascend710_bar0_quirk(VFIOPCIDevice *vdev, int nr)
      */
     memory_region_init_io(&quirk->mem[0], OBJECT(vdev),
                           &vfio_ascend_intercept_regs_quirk,
-                          &bar0_quirk[0],
-                          "vfio-ascend710-bar0-intercept-regs-quirk",
+                          &bar2_quirk[0],
+                          "vfio-ascend710-bar2-1p-intercept-regs-quirk",
                           ASCEND710_XLOADER_SIZE);
     memory_region_add_subregion_overlap(vdev->bars[nr].region.mem,
-                                        bar0_quirk[0].offset,
+                                        bar2_quirk[0].offset,
                                         &quirk->mem[0], 1);
+
+    if (devnum == ASCEND710_2P_DEVNUM) {
+        bar2_quirk[1].vdev = vdev;
+        bar2_quirk[1].offset = (ASCEND710_2P_BASE + ASCEND710_XLOADER_OFFSET);
+        bar2_quirk[1].bar = nr;
+
+        memory_region_init_io(&quirk->mem[1], OBJECT(vdev),
+                              &vfio_ascend_intercept_regs_quirk,
+                              &bar2_quirk[1],
+                              "vfio-ascend710-bar2-2p-intercept-regs-quirk",
+                              ASCEND710_XLOADER_SIZE);
+        memory_region_add_subregion_overlap(vdev->bars[nr].region.mem,
+                                            bar2_quirk[1].offset,
+                                            &quirk->mem[1], 1);
+    }
+
     QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
 }
 
@@ -1408,7 +1446,7 @@ void vfio_bar_quirk_setup(VFIOPCIDevice *vdev, int nr)
     vfio_probe_igd_bar4_quirk(vdev, nr);
 #endif
     vfio_probe_ascend910_bar0_quirk(vdev, nr);
-    vfio_probe_ascend710_bar0_quirk(vdev, nr);
+    vfio_probe_ascend710_bar2_quirk(vdev, nr);
     vfio_probe_ascend310_bar4_quirk(vdev, nr);
 }
 
-- 
2.27.0