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Subject[PATCH 11/21] amd64_edac: assign DRAM chip select base and mask in a family-specific way
Date
From: Doug Thompson <dougthompson@xmission.com>

Reviewed-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Doug Thompson <dougthompson@xmission.com>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
---
drivers/edac/amd64_edac.c | 154 +++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 154 insertions(+), 0 deletions(-)
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 91f414e..0e6a44c 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -923,4 +923,158 @@ static void amd64_read_dbam_reg(struct amd64_pvt *pvt)
}
}

+/*
+ * amd64_set_dct_base_and_mask(pvt)
+ *
+ * NOTE: CPU Revision Dependent code: Rev E and Rev F
+ *
+ * Set the DCSB and DCSM mask values depending on the CPU revision value.
+ * Also set the shift factor for the DCSB and DCSM values.
+ *
+ * ->dcs_mask_notused, REV E:
+ *
+ * To find the max InputAddr for the csrow, start with the base
+ * address and set all bits that are "don't care" bits in the test at
+ * the start of section 3.5.4 (p. 84).
+ *
+ * The "don't care" bits are all set bits in the mask and
+ * all bits in the gaps between bit ranges [35-25] and [19-13].
+ * The value REV_E_DCS_NOTUSED_BITS represents bits [24-20] and [12-0],
+ * which are all bits in the above-mentioned gaps.
+ *
+ * ->dcs_mask_notused, REV F and later:
+ *
+ * To find the max InputAddr for the csrow, start with the base
+ * address and set all bits that are "don't care" bits in the test at
+ * the start of NPT section 4.5.4 (p. 87).
+ *
+ * The "don't care" bits are all set bits in the mask and
+ * all bits in the gaps between bit ranges [36-27] and [21-13].
+ *
+ * The value REV_F_F1Xh_DCS_NOTUSED_BITS represents bits [26-22] and
+ * [12-0], which are all bits in the above-mentioned gaps.
+ */
+static void amd64_set_dct_base_and_mask(struct amd64_pvt *pvt)
+{
+ if (pvt->ext_model >= OPTERON_CPU_REV_F) {
+ pvt->dcsb_base = REV_F_F1Xh_DCSB_BASE_BITS;
+ pvt->dcsm_mask = REV_F_F1Xh_DCSM_MASK_BITS;
+ pvt->dcs_mask_notused = REV_F_F1Xh_DCS_NOTUSED_BITS;
+ pvt->dcs_shift = REV_F_F1Xh_DCS_SHIFT;
+
+ switch (boot_cpu_data.x86) {
+ case 0xf:
+ pvt->num_dcsm = REV_F_DCSM_COUNT;
+ break;
+
+ case 0x10:
+ pvt->num_dcsm = F10_DCSM_COUNT;
+ break;
+
+ case 0x11:
+ pvt->num_dcsm = F11_DCSM_COUNT;
+ break;
+
+ default:
+ amd64_printk(KERN_ERR, "Unsupported family!\n");
+ break;
+ }
+ } else {
+ pvt->dcsb_base = REV_E_DCSB_BASE_BITS;
+ pvt->dcsm_mask = REV_E_DCSM_MASK_BITS;
+ pvt->dcs_mask_notused = REV_E_DCS_NOTUSED_BITS;
+ pvt->dcs_shift = REV_E_DCS_SHIFT;
+ pvt->num_dcsm = REV_E_DCSM_COUNT;
+ }
+}
+
+/*
+ * amd64_read_dct_base_mask
+ *
+ * Function 2 Offset F10_DCSB0
+ * Read in the DCS Base and DCS Mask hw registers
+ */
+static void amd64_read_dct_base_mask(struct amd64_pvt *pvt)
+{
+ int cs;
+ int err;
+ int reg;
+
+ debugf0("%s()\n", __func__);
+
+ amd64_set_dct_base_and_mask(pvt);
+
+ for (cs = 0; cs < CHIPSELECT_COUNT; cs++) {
+ reg = K8_DCSB0 + (cs * 4);
+ err = pci_read_config_dword(pvt->dram_f2_ctl, reg,
+ &pvt->dcsb0[cs]);
+ if (unlikely(err))
+ debugf0("%s() Reading K8_DCSB0[%d] failed\n",
+ __func__, cs);
+ else
+ debugf0(" DCSB0[%d]=0x%08x reg: F2x%x\n",
+ cs, pvt->dcsb0[cs], reg);
+
+ /* If DCT are NOT ganged, then read in DCT1's base */
+ if (boot_cpu_data.x86 >= 0x10 && !dct_ganging_enabled(pvt)) {
+ reg = F10_DCSB1 + (cs * 4);
+ err = pci_read_config_dword(pvt->dram_f2_ctl, reg,
+ &pvt->dcsb1[cs]);
+ if (err != 0)
+ debugf0("%s() Reading F10_DCSB1[%d] failed\n",
+ __func__, cs);
+ else
+ debugf0(" DCSB1[%d]=0x%08x reg: F2x%x\n",
+ cs, pvt->dcsb1[cs], reg);
+ } else {
+ pvt->dcsb1[cs] = 0;
+ }
+ }
+
+ for (cs = 0; cs < pvt->num_dcsm; cs++) {
+ reg = K8_DCSB0 + (cs * 4);
+ err = pci_read_config_dword(pvt->dram_f2_ctl, reg,
+ &pvt->dcsm0[cs]);
+ if (unlikely(err))
+ debugf0("%s() Reading K8_DCSM0 failed\n", __func__);
+ else
+ debugf0(" DCSM0[%d]=0x%08x reg: F2x%x\n",
+ cs, pvt->dcsm0[cs], reg);
+
+ /* If DCT are NOT ganged, then read in DCT1's mask */
+ if (boot_cpu_data.x86 >= 0x10 && !dct_ganging_enabled(pvt)) {
+ reg = F10_DCSM1 + (cs * 4);
+ err = pci_read_config_dword(pvt->dram_f2_ctl, reg,
+ &pvt->dcsm1[cs]);
+ if (unlikely(err))
+ debugf0("%s() Reading F10_DCSM1[%d] failed\n",
+ __func__, cs);
+ else
+ debugf0(" DCSM1[%d]=0x%08x reg: F2x%x\n",
+ cs, pvt->dcsm1[cs], reg);
+ } else
+ pvt->dcsm1[cs] = 0;
+ }
+}
+
+static enum mem_type amd64_determine_memory_type(struct amd64_pvt *pvt)
+{
+ enum mem_type type;
+
+ if (boot_cpu_data.x86 >= 0x10 || pvt->ext_model >= OPTERON_CPU_REV_F) {
+ /* Rev F and later */
+ type = (pvt->dclr0 & BIT(16)) ? MEM_DDR2 : MEM_RDDR2;
+ } else {
+ /* Rev E and earlier */
+ type = (pvt->dclr0 & BIT(18)) ? MEM_DDR : MEM_RDDR;
+ }
+
+ debugf1(" Memory type is: %s\n",
+ (type == MEM_DDR2) ? "MEM_DDR2" :
+ (type == MEM_RDDR2) ? "MEM_RDDR2" :
+ (type == MEM_DDR) ? "MEM_DDR" : "MEM_RDDR");
+
+ return type;
+}
+

--
1.6.2.4



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