[PATCH v2 1/2] EDAC, ie31200: Add Intel Coffee Lake CPU support

[Marco Elver]

Coffee Lake seems to work like Skylake and Kaby Lake. This patch adds all
device IDs for Coffee Lake-S CPUs according to datasheet.

Signed-off-by: Marco Elver <elver@xxxxxxxxxx>
Cc: Jason Baron <jbaron@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: linux-edac <linux-edac@xxxxxxxxxxxxxxx>
---

v2:
- Reverted formatting existing pci_tbl entries.

Tested with a Xeon E-2124G.
---
 drivers/edac/ie31200_edac.c | 58 +++++++++++++++++++++++++++++++++++--
 1 file changed, 55 insertions(+), 3 deletions(-)

diff --git a/drivers/edac/ie31200_edac.c b/drivers/edac/ie31200_edac.c
index adf60eb45bd4..cdb26014d929 100644
--- a/drivers/edac/ie31200_edac.c
+++ b/drivers/edac/ie31200_edac.c
@@ -20,11 +20,13 @@
  * 0c08: Xeon E3-1200 v3 Processor DRAM Controller
  * 1918: Xeon E3-1200 v5 Skylake Host Bridge/DRAM Registers
  * 5918: Xeon E3-1200 Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers
+ * 3e..: 8th/9th Gen Core Processor Host Bridge/DRAM Registers
  *
  * Based on Intel specification:
  * http://www.intel.com/content/dam/www/public/us/en/documents/datasheets/xeon-e3-1200v3-vol-2-datasheet.pdf
  * http://www.intel.com/content/www/us/en/processors/xeon/xeon-e3-1200-family-vol-2-datasheet.html
  * http://www.intel.com/content/www/us/en/processors/core/7th-gen-core-family-mobile-h-processor-lines-datasheet-vol-2.html
+ * https://www.intel.com/content/www/us/en/products/docs/processors/core/8th-gen-core-family-datasheet-vol-2.html
  *
  * According to the above datasheet (p.16):
  * "
@@ -61,6 +63,26 @@
 #define PCI_DEVICE_ID_INTEL_IE31200_HB_8 0x1918
 #define PCI_DEVICE_ID_INTEL_IE31200_HB_9 0x5918
 
+/* Coffee Lake-S */
+#define PCI_DEVICE_ID_INTEL_IE31200_HB_CFL_MASK 0x3e00
+#define PCI_DEVICE_ID_INTEL_IE31200_HB_CFL_1    0x3e0f
+#define PCI_DEVICE_ID_INTEL_IE31200_HB_CFL_2    0x3e18
+#define PCI_DEVICE_ID_INTEL_IE31200_HB_CFL_3    0x3e1f
+#define PCI_DEVICE_ID_INTEL_IE31200_HB_CFL_4    0x3e30
+#define PCI_DEVICE_ID_INTEL_IE31200_HB_CFL_5    0x3e31
+#define PCI_DEVICE_ID_INTEL_IE31200_HB_CFL_6    0x3e32
+#define PCI_DEVICE_ID_INTEL_IE31200_HB_CFL_7    0x3e33
+#define PCI_DEVICE_ID_INTEL_IE31200_HB_CFL_8    0x3ec2
+#define PCI_DEVICE_ID_INTEL_IE31200_HB_CFL_9    0x3ec6
+#define PCI_DEVICE_ID_INTEL_IE31200_HB_CFL_10   0x3eca
+
+/* Helper macro to test if HB is for Skylake or later. */
+#define DEVICE_ID_SKYLAKE_OR_LATER(did)                                        \
+	(((did) == PCI_DEVICE_ID_INTEL_IE31200_HB_8) ||                        \
+	 ((did) == PCI_DEVICE_ID_INTEL_IE31200_HB_9) ||                        \
+	 (((did)&PCI_DEVICE_ID_INTEL_IE31200_HB_CFL_MASK) ==                   \
+	  PCI_DEVICE_ID_INTEL_IE31200_HB_CFL_MASK))
+
 #define IE31200_DIMMS			4
 #define IE31200_RANKS			8
 #define IE31200_RANKS_PER_CHANNEL	4
@@ -381,10 +403,10 @@ static int ie31200_probe1(struct pci_dev *pdev, int dev_idx)
 	u32 addr_decode, mad_offset;
 
 	/*
-	 * Kaby Lake seems to work like Skylake. Please re-visit this logic
-	 * when adding new CPU support.
+	 * Kaby Lake, Coffee Lake seem to work like Skylake. Please re-visit
+	 * this logic when adding new CPU support.
 	 */
-	bool skl = (pdev->device >= PCI_DEVICE_ID_INTEL_IE31200_HB_8);
+	bool skl = DEVICE_ID_SKYLAKE_OR_LATER(pdev->device);
 
 	edac_dbg(0, "MC:\n");
 
@@ -569,6 +591,36 @@ static const struct pci_device_id ie31200_pci_tbl[] = {
 	{
 		PCI_VEND_DEV(INTEL, IE31200_HB_9), PCI_ANY_ID, PCI_ANY_ID, 0, 0,
 		IE31200},
+	{
+		PCI_VEND_DEV(INTEL, IE31200_HB_CFL_1), PCI_ANY_ID, PCI_ANY_ID,
+		0, 0, IE31200},
+	{
+		PCI_VEND_DEV(INTEL, IE31200_HB_CFL_2), PCI_ANY_ID, PCI_ANY_ID,
+		0, 0, IE31200},
+	{
+		PCI_VEND_DEV(INTEL, IE31200_HB_CFL_3), PCI_ANY_ID, PCI_ANY_ID,
+		0, 0, IE31200},
+	{
+		PCI_VEND_DEV(INTEL, IE31200_HB_CFL_4), PCI_ANY_ID, PCI_ANY_ID,
+		0, 0, IE31200},
+	{
+		PCI_VEND_DEV(INTEL, IE31200_HB_CFL_5), PCI_ANY_ID, PCI_ANY_ID,
+		0, 0, IE31200},
+	{
+		PCI_VEND_DEV(INTEL, IE31200_HB_CFL_6), PCI_ANY_ID, PCI_ANY_ID,
+		0, 0, IE31200},
+	{
+		PCI_VEND_DEV(INTEL, IE31200_HB_CFL_7), PCI_ANY_ID, PCI_ANY_ID,
+		0, 0, IE31200},
+	{
+		PCI_VEND_DEV(INTEL, IE31200_HB_CFL_8), PCI_ANY_ID, PCI_ANY_ID,
+		0, 0, IE31200},
+	{
+		PCI_VEND_DEV(INTEL, IE31200_HB_CFL_9), PCI_ANY_ID, PCI_ANY_ID,
+		0, 0, IE31200},
+	{
+		PCI_VEND_DEV(INTEL, IE31200_HB_CFL_10), PCI_ANY_ID, PCI_ANY_ID,
+		0, 0, IE31200},
 	{
 		0,
 	}            /* 0 terminated list. */
-- 
2.22.0.rc2.383.gf4fbbf30c2-goog