cxl: Dump debug info on the AFU configuration record

Now that we parse the AFU Configuration record, dump some info on it when in
debug mode.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

drivers/misc/cxl/pci.c

@@ -90,6 +90,7 @@
 /* This works a little different than the p1/p2 register accesses to make it
  * easier to pull out individual fields */
 #define AFUD_READ(afu, off)		in_be64(afu->afu_desc_mmio + off)
+#define AFUD_READ_LE(afu, off)		in_le64(afu->afu_desc_mmio + off)
 #define EXTRACT_PPC_BIT(val, bit)	(!!(val & PPC_BIT(bit)))
 #define EXTRACT_PPC_BITS(val, bs, be)	((val & PPC_BITMASK(bs, be)) >> PPC_BITLSHIFT(be))
 
@@ -286,7 +287,8 @@ static void dump_cxl_config_space(struct pci_dev *dev)
 
 static void dump_afu_descriptor(struct cxl_afu *afu)
 {
-	u64 val;
+	u64 val, afu_cr_num, afu_cr_off, afu_cr_len;
+	int i;
 
 #define show_reg(name, what) \
 	dev_info(&afu->dev, "afu desc: %30s: %#llx\n", name, what)
@@ -296,6 +298,7 @@ static void dump_afu_descriptor(struct cxl_afu *afu)
 	show_reg("num_of_processes", AFUD_NUM_PROCS(val));
 	show_reg("num_of_afu_CRs", AFUD_NUM_CRS(val));
 	show_reg("req_prog_mode", val & 0xffffULL);
+	afu_cr_num = AFUD_NUM_CRS(val);
 
 	val = AFUD_READ(afu, 0x8);
 	show_reg("Reserved", val);
@@ -307,8 +310,10 @@ static void dump_afu_descriptor(struct cxl_afu *afu)
 	val = AFUD_READ_CR(afu);
 	show_reg("Reserved", (val >> (63-7)) & 0xff);
 	show_reg("AFU_CR_len", AFUD_CR_LEN(val));
+	afu_cr_len = AFUD_CR_LEN(val) * 256;
 
 	val = AFUD_READ_CR_OFF(afu);
+	afu_cr_off = val;
 	show_reg("AFU_CR_offset", val);
 
 	val = AFUD_READ_PPPSA(afu);
@@ -325,6 +330,11 @@ static void dump_afu_descriptor(struct cxl_afu *afu)
 	val = AFUD_READ_EB_OFF(afu);
 	show_reg("AFU_EB_offset", val);
 
+	for (i = 0; i < afu_cr_num; i++) {
+		val = AFUD_READ_LE(afu, afu_cr_off + i * afu_cr_len);
+		show_reg("CR Vendor", val & 0xffff);
+		show_reg("CR Device", (val >> 16) & 0xffff);
+	}
 #undef show_reg
 }