summaryrefslogtreecommitdiff
path: root/src/northbridge
diff options
context:
space:
mode:
Diffstat (limited to 'src/northbridge')
-rw-r--r--src/northbridge/amd/amdht/h3ffeat.h3
-rw-r--r--src/northbridge/amd/amdht/h3finit.c35
-rw-r--r--src/northbridge/amd/amdht/h3finit.h4
-rw-r--r--src/northbridge/amd/amdht/h3ncmn.c30
4 files changed, 68 insertions, 4 deletions
diff --git a/src/northbridge/amd/amdht/h3ffeat.h b/src/northbridge/amd/amdht/h3ffeat.h
index 628b86e660..bcd4c10cd2 100644
--- a/src/northbridge/amd/amdht/h3ffeat.h
+++ b/src/northbridge/amd/amdht/h3ffeat.h
@@ -75,6 +75,7 @@
#define HTSLAVE_LINK01_OFFSET 4
#define HTSLAVE_LINK_CONTROL_0_REG 4
#define HTSLAVE_FREQ_REV_0_REG 0xC
+#define HTSLAVE_FEATURE_CAP_REG 0x10
/* HT3 gen Capability */
#define IS_HT_GEN3_CAPABILITY(reg) \
@@ -122,10 +123,12 @@ typedef struct
u8 SelWidthIn;
u8 SelWidthOut;
u8 SelFrequency;
+ uint8_t enable_isochronous_mode;
/* This section is for keeping track of capabilities and possible configurations */
BOOL RegangCap;
uint32_t PrvFrequencyCap;
+ uint32_t PrvFeatureCap;
u8 PrvWidthInCap;
u8 PrvWidthOutCap;
uint32_t CompositeFrequencyCap;
diff --git a/src/northbridge/amd/amdht/h3finit.c b/src/northbridge/amd/amdht/h3finit.c
index e4ce76803a..6a45f10306 100644
--- a/src/northbridge/amd/amdht/h3finit.c
+++ b/src/northbridge/amd/amdht/h3finit.c
@@ -1415,6 +1415,38 @@ static void regangLinks(sMainData *pDat)
#endif /* HT_BUILD_NC_ONLY */
}
+static void detectIoLinkIsochronousCapable(sMainData *pDat)
+{
+ uint8_t i;
+ unsigned char iommu;
+ uint8_t isochronous_capable = 0;
+
+ iommu = 1;
+ get_option(&iommu, "iommu");
+
+ for (i = 0; i < pDat->TotalLinks*2; i += 2) {
+ if ((pDat->PortList[i].Type == PORTLIST_TYPE_CPU) && (pDat->PortList[i+1].Type == PORTLIST_TYPE_IO)) {
+ if ((pDat->PortList[i].PrvFeatureCap & 0x1) && (pDat->PortList[i+1].PrvFeatureCap & 0x1)) {
+ pDat->PortList[i].enable_isochronous_mode = 1;
+ pDat->PortList[i+1].enable_isochronous_mode = 1;
+ isochronous_capable = 1;
+ } else {
+ pDat->PortList[i].enable_isochronous_mode = 0;
+ pDat->PortList[i+1].enable_isochronous_mode = 0;
+ }
+ }
+ }
+
+ if (isochronous_capable && iommu) {
+ printk(BIOS_DEBUG, "Forcing HT links to isochronous mode due to enabled IOMMU\n");
+ /* Isochronous mode must be set on all links if the IOMMU is enabled */
+ for (i = 0; i < pDat->TotalLinks*2; i += 2) {
+ pDat->PortList[i].enable_isochronous_mode = 1;
+ pDat->PortList[i+1].enable_isochronous_mode = 1;
+ }
+ }
+}
+
/*----------------------------------------------------------------------------------------
* void
* selectOptimalWidthAndFrequency(sMainData *pDat)
@@ -1535,7 +1567,6 @@ static void selectOptimalWidthAndFrequency(sMainData *pDat)
temp = cbPCBBAUpstreamWidth;
pDat->PortList[i].SelWidthIn = (u8)temp;
pDat->PortList[i+1].SelWidthOut = (u8)temp;
-
}
}
@@ -1697,6 +1728,8 @@ static void linkOptimization(sMainData *pDat)
{
pDat->nb->gatherLinkData(pDat, pDat->nb);
regangLinks(pDat);
+ if (is_fam15h())
+ detectIoLinkIsochronousCapable(pDat);
selectOptimalWidthAndFrequency(pDat);
hammerSublinkFixup(pDat);
pDat->nb->setLinkData(pDat, pDat->nb);
diff --git a/src/northbridge/amd/amdht/h3finit.h b/src/northbridge/amd/amdht/h3finit.h
index 1bd8616ef2..ab2dace20c 100644
--- a/src/northbridge/amd/amdht/h3finit.h
+++ b/src/northbridge/amd/amdht/h3finit.h
@@ -227,6 +227,7 @@ typedef struct {
* @param[in,out] u8* LinkWidthIn = modify to change the Link Witdh In
* @param[in,out] u8* LinkWidthOut = modify to change the Link Witdh Out
* @param[in,out] u32* FreqCap = modify to change the link's frequency capability
+ * @param[in,out] u32* FeatureCap = modify to change the link's feature capability
*
* ---------------------------------------------------------------------------------------
*/
@@ -241,7 +242,8 @@ typedef struct {
u8 Link,
u8 *LinkWidthIn,
u8 *LinkWidthOut,
- u32 *FreqCap
+ u32 *FreqCap,
+ u32 *FeatureCap
);
/**----------------------------------------------------------------------------------------
diff --git a/src/northbridge/amd/amdht/h3ncmn.c b/src/northbridge/amd/amdht/h3ncmn.c
index c97d59293f..7937c6ea1a 100644
--- a/src/northbridge/amd/amdht/h3ncmn.c
+++ b/src/northbridge/amd/amdht/h3ncmn.c
@@ -1429,12 +1429,15 @@ static void gatherLinkData(sMainData *pDat, cNorthBridge *nb)
temp &= 0x7; /* Mask off reserved values */
pDat->PortList[i].PrvFrequencyCap |= (temp << 17);
}
+
+ AmdPCIReadBits(linkBase + HTHOST_FEATURE_CAP_REG, 9, 0, &temp);
+ pDat->PortList[i].PrvFeatureCap = (u16)temp;
}
else
{
linkBase = pDat->PortList[i].Pointer;
if (pDat->PortList[i].Link == 1)
- linkBase += HTSLAVE_LINK01_OFFSET;
+ linkBase += HTSLAVE_LINK01_OFFSET;
AmdPCIReadBits(linkBase + HTSLAVE_LINK_CONTROL_0_REG, 22, 20, &temp);
pDat->PortList[i].PrvWidthOutCap = convertBitsToWidth((u8)temp, pDat->nb);
@@ -1445,6 +1448,9 @@ static void gatherLinkData(sMainData *pDat, cNorthBridge *nb)
AmdPCIReadBits(linkBase + HTSLAVE_FREQ_REV_0_REG, 31, 16, &temp);
pDat->PortList[i].PrvFrequencyCap = (u16)temp;
+ AmdPCIReadBits(linkBase + HTSLAVE_FEATURE_CAP_REG, 7, 0, &temp);
+ pDat->PortList[i].PrvFeatureCap = (u16)temp;
+
if (pDat->HtBlock->AMD_CB_DeviceCapOverride)
{
linkBase &= 0xFFFFF000;
@@ -1461,7 +1467,8 @@ static void gatherLinkData(sMainData *pDat, cNorthBridge *nb)
pDat->PortList[i].Link,
&(pDat->PortList[i].PrvWidthInCap),
&(pDat->PortList[i].PrvWidthOutCap),
- &(pDat->PortList[i].PrvFrequencyCap));
+ &(pDat->PortList[i].PrvFrequencyCap),
+ &(pDat->PortList[i].PrvFeatureCap));
}
}
}
@@ -1562,6 +1569,16 @@ static void setLinkData(sMainData *pDat, cNorthBridge *nb)
if (is_gt_rev_d())
AmdPCIWriteBits(linkBase + HTHOST_FREQ_REV_REG_2, 0, 0, &temp2);
AmdPCIWriteBits(linkBase + HTHOST_FREQ_REV_REG, 11, 8, &temp);
+
+ /* Enable isochronous flow control mode if supported by chipset */
+ if (is_fam15h()) {
+ if (pDat->PortList[i].enable_isochronous_mode)
+ temp = 1;
+ else
+ temp = 0;
+ setHtControlRegisterBits(linkBase + HTHOST_LINK_CONTROL_REG, 12, 12, &temp);
+ }
+
if (frequency_index > HT_FREQUENCY_1000M) /* Gen1 = 200MHz -> 1000MHz, Gen3 = 1200MHz -> 3200MHz */
{
/* Enable for Gen3 frequencies */
@@ -1579,6 +1596,7 @@ static void setLinkData(sMainData *pDat, cNorthBridge *nb)
CPU_HTNB_FUNC_00,
REG_HT_LINK_RETRY0_0X130 + 4*pDat->PortList[i].Link),
0, 0, &temp);
+
/* and Scrambling enable / disable */
AmdPCIWriteBits(MAKE_SBDFO(makePCISegmentFromNode(pDat->PortList[i].NodeID),
makePCIBusFromNode(pDat->PortList[i].NodeID),
@@ -1617,6 +1635,14 @@ static void setLinkData(sMainData *pDat, cNorthBridge *nb)
bits = 0;
}
+ /* Enable isochronous flow control mode if supported by chipset */
+ if (is_fam15h()) {
+ if (pDat->PortList[i].enable_isochronous_mode)
+ temp = 1;
+ else
+ temp = 0;
+ }
+
/* Retry Enable */
isFound = FALSE;
currentPtr = linkBase & (u32)0xFFFFF000; /* Set PCI Offset to 0 */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 09:37:14 +0000