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-rw-r--r--drivers/pci/pci.h3
-rw-r--r--drivers/pci/pcie/aer.c1
-rw-r--r--drivers/pci/pcie/dpc.c18
-rw-r--r--drivers/pci/pcie/tlp.c56
-rw-r--r--include/linux/aer.h12
-rw-r--r--include/ras/ras_event.h12
-rw-r--r--include/uapi/linux/pci_regs.h6
7 files changed, 77 insertions, 31 deletions
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 9da7da58e0de..b8911d1e10dc 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -554,7 +554,8 @@ int aer_get_device_error_info(struct pci_dev *dev, struct aer_err_info *info);
void aer_print_error(struct pci_dev *dev, struct aer_err_info *info);
int pcie_read_tlp_log(struct pci_dev *dev, int where, int where2,
- unsigned int tlp_len, struct pcie_tlp_log *log);
+ unsigned int tlp_len, bool flit,
+ struct pcie_tlp_log *log);
unsigned int aer_tlp_log_len(struct pci_dev *dev, u32 aercc);
void pcie_print_tlp_log(const struct pci_dev *dev,
const struct pcie_tlp_log *log, const char *pfx);
diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index ad4206125b86..9cff7069577e 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -1249,6 +1249,7 @@ int aer_get_device_error_info(struct pci_dev *dev, struct aer_err_info *info)
pcie_read_tlp_log(dev, aer + PCI_ERR_HEADER_LOG,
aer + PCI_ERR_PREFIX_LOG,
aer_tlp_log_len(dev, aercc),
+ aercc & PCI_ERR_CAP_TLP_LOG_FLIT,
&info->tlp);
}
}
diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c
index 242cabd5eeeb..df42f15c9829 100644
--- a/drivers/pci/pcie/dpc.c
+++ b/drivers/pci/pcie/dpc.c
@@ -219,7 +219,9 @@ static void dpc_process_rp_pio_error(struct pci_dev *pdev)
goto clear_status;
pcie_read_tlp_log(pdev, cap + PCI_EXP_DPC_RP_PIO_HEADER_LOG,
cap + PCI_EXP_DPC_RP_PIO_TLPPREFIX_LOG,
- dpc_tlp_log_len(pdev), &tlp_log);
+ dpc_tlp_log_len(pdev),
+ pdev->subordinate->flit_mode,
+ &tlp_log);
pcie_print_tlp_log(pdev, &tlp_log, dev_fmt(""));
if (pdev->dpc_rp_log_size < PCIE_STD_NUM_TLP_HEADERLOG + 1)
@@ -398,11 +400,21 @@ void pci_dpc_init(struct pci_dev *pdev)
/* Quirks may set dpc_rp_log_size if device or firmware is buggy */
if (!pdev->dpc_rp_log_size) {
+ u16 flags;
+ int ret;
+
+ ret = pcie_capability_read_word(pdev, PCI_EXP_FLAGS, &flags);
+ if (ret)
+ return;
+
pdev->dpc_rp_log_size =
FIELD_GET(PCI_EXP_DPC_RP_PIO_LOG_SIZE, cap);
+ if (FIELD_GET(PCI_EXP_FLAGS_FLIT, flags))
+ pdev->dpc_rp_log_size += FIELD_GET(PCI_EXP_DPC_RP_PIO_LOG_SIZE4,
+ cap) << 4;
+
if (pdev->dpc_rp_log_size < PCIE_STD_NUM_TLP_HEADERLOG ||
- pdev->dpc_rp_log_size > PCIE_STD_NUM_TLP_HEADERLOG + 1 +
- PCIE_STD_MAX_TLP_PREFIXLOG) {
+ pdev->dpc_rp_log_size > PCIE_STD_MAX_TLP_HEADERLOG + 1) {
pci_err(pdev, "RP PIO log size %u is invalid\n",
pdev->dpc_rp_log_size);
pdev->dpc_rp_log_size = 0;
diff --git a/drivers/pci/pcie/tlp.c b/drivers/pci/pcie/tlp.c
index 0860b5da837f..890d5391d7f5 100644
--- a/drivers/pci/pcie/tlp.c
+++ b/drivers/pci/pcie/tlp.c
@@ -7,6 +7,7 @@
#include <linux/aer.h>
#include <linux/array_size.h>
+#include <linux/bitfield.h>
#include <linux/pci.h>
#include <linux/string.h>
@@ -21,6 +22,9 @@
*/
unsigned int aer_tlp_log_len(struct pci_dev *dev, u32 aercc)
{
+ if (aercc & PCI_ERR_CAP_TLP_LOG_FLIT)
+ return FIELD_GET(PCI_ERR_CAP_TLP_LOG_SIZE, aercc);
+
return PCIE_STD_NUM_TLP_HEADERLOG +
((aercc & PCI_ERR_CAP_PREFIX_LOG_PRESENT) ?
dev->eetlp_prefix_max : 0);
@@ -49,6 +53,7 @@ unsigned int dpc_tlp_log_len(struct pci_dev *dev)
* @where: PCI Config offset of TLP Header Log
* @where2: PCI Config offset of TLP Prefix Log
* @tlp_len: TLP Log length (Header Log + TLP Prefix Log in DWORDs)
+ * @flit: TLP Logged in Flit mode
* @log: TLP Log structure to fill
*
* Fill @log from TLP Header Log registers, e.g., AER or DPC.
@@ -56,28 +61,34 @@ unsigned int dpc_tlp_log_len(struct pci_dev *dev)
* Return: 0 on success and filled TLP Log structure, <0 on error.
*/
int pcie_read_tlp_log(struct pci_dev *dev, int where, int where2,
- unsigned int tlp_len, struct pcie_tlp_log *log)
+ unsigned int tlp_len, bool flit, struct pcie_tlp_log *log)
{
unsigned int i;
int off, ret;
- u32 *to;
+
+ if (tlp_len > ARRAY_SIZE(log->dw))
+ tlp_len = ARRAY_SIZE(log->dw);
memset(log, 0, sizeof(*log));
for (i = 0; i < tlp_len; i++) {
- if (i < PCIE_STD_NUM_TLP_HEADERLOG) {
+ if (i < PCIE_STD_NUM_TLP_HEADERLOG)
off = where + i * 4;
- to = &log->dw[i];
- } else {
+ else
off = where2 + (i - PCIE_STD_NUM_TLP_HEADERLOG) * 4;
- to = &log->prefix[i - PCIE_STD_NUM_TLP_HEADERLOG];
- }
- ret = pci_read_config_dword(dev, off, to);
+ ret = pci_read_config_dword(dev, off, &log->dw[i]);
if (ret)
return pcibios_err_to_errno(ret);
}
+ /*
+ * Hard-code non-Flit mode to 4 DWORDs, for now. The exact length
+ * can only be known if the TLP is parsed.
+ */
+ log->header_len = flit ? tlp_len : 4;
+ log->flit = flit;
+
return 0;
}
@@ -94,22 +105,31 @@ int pcie_read_tlp_log(struct pci_dev *dev, int where, int where2,
void pcie_print_tlp_log(const struct pci_dev *dev,
const struct pcie_tlp_log *log, const char *pfx)
{
- char buf[11 * (PCIE_STD_NUM_TLP_HEADERLOG + ARRAY_SIZE(log->prefix)) +
- sizeof(EE_PREFIX_STR)];
+ /* EE_PREFIX_STR fits the extended DW space needed for the Flit mode */
+ char buf[11 * PCIE_STD_MAX_TLP_HEADERLOG + 1];
unsigned int i;
int len;
len = scnprintf(buf, sizeof(buf), "%#010x %#010x %#010x %#010x",
log->dw[0], log->dw[1], log->dw[2], log->dw[3]);
- if (log->prefix[0])
- len += scnprintf(buf + len, sizeof(buf) - len, EE_PREFIX_STR);
- for (i = 0; i < ARRAY_SIZE(log->prefix); i++) {
- if (!log->prefix[i])
- break;
- len += scnprintf(buf + len, sizeof(buf) - len,
- " %#010x", log->prefix[i]);
+ if (log->flit) {
+ for (i = PCIE_STD_NUM_TLP_HEADERLOG; i < log->header_len; i++) {
+ len += scnprintf(buf + len, sizeof(buf) - len,
+ " %#010x", log->dw[i]);
+ }
+ } else {
+ if (log->prefix[0])
+ len += scnprintf(buf + len, sizeof(buf) - len,
+ EE_PREFIX_STR);
+ for (i = 0; i < ARRAY_SIZE(log->prefix); i++) {
+ if (!log->prefix[i])
+ break;
+ len += scnprintf(buf + len, sizeof(buf) - len,
+ " %#010x", log->prefix[i]);
+ }
}
- pci_err(dev, "%sTLP Header: %s\n", pfx, buf);
+ pci_err(dev, "%sTLP Header%s: %s\n", pfx,
+ log->flit ? " (Flit)" : "", buf);
}
diff --git a/include/linux/aer.h b/include/linux/aer.h
index 947b63091902..02940be66324 100644
--- a/include/linux/aer.h
+++ b/include/linux/aer.h
@@ -22,12 +22,20 @@
*/
#define PCIE_STD_NUM_TLP_HEADERLOG 4
#define PCIE_STD_MAX_TLP_PREFIXLOG 4
+#define PCIE_STD_MAX_TLP_HEADERLOG (PCIE_STD_NUM_TLP_HEADERLOG + 10)
struct pci_dev;
struct pcie_tlp_log {
- u32 dw[PCIE_STD_NUM_TLP_HEADERLOG];
- u32 prefix[PCIE_STD_MAX_TLP_PREFIXLOG];
+ union {
+ u32 dw[PCIE_STD_MAX_TLP_HEADERLOG];
+ struct {
+ u32 _do_not_use[PCIE_STD_NUM_TLP_HEADERLOG];
+ u32 prefix[PCIE_STD_MAX_TLP_PREFIXLOG];
+ };
+ };
+ u8 header_len; /* Length of the Logged TLP Header in DWORDs */
+ bool flit; /* TLP was logged when in Flit mode */
};
struct aer_capability_regs {
diff --git a/include/ras/ras_event.h b/include/ras/ras_event.h
index e5f7ee0864e7..14c9f943d53f 100644
--- a/include/ras/ras_event.h
+++ b/include/ras/ras_event.h
@@ -309,7 +309,7 @@ TRACE_EVENT(aer_event,
__field( u32, status )
__field( u8, severity )
__field( u8, tlp_header_valid)
- __array( u32, tlp_header, 4 )
+ __array( u32, tlp_header, PCIE_STD_MAX_TLP_HEADERLOG)
),
TP_fast_assign(
@@ -318,10 +318,10 @@ TRACE_EVENT(aer_event,
__entry->severity = severity;
__entry->tlp_header_valid = tlp_header_valid;
if (tlp_header_valid) {
- __entry->tlp_header[0] = tlp->dw[0];
- __entry->tlp_header[1] = tlp->dw[1];
- __entry->tlp_header[2] = tlp->dw[2];
- __entry->tlp_header[3] = tlp->dw[3];
+ int i;
+
+ for (i = 0; i < PCIE_STD_MAX_TLP_HEADERLOG; i++)
+ __entry->tlp_header[i] = tlp->dw[i];
}
),
@@ -334,7 +334,7 @@ TRACE_EVENT(aer_event,
__print_flags(__entry->status, "|", aer_correctable_errors) :
__print_flags(__entry->status, "|", aer_uncorrectable_errors),
__entry->tlp_header_valid ?
- __print_array(__entry->tlp_header, 4, 4) :
+ __print_array(__entry->tlp_header, PCIE_STD_MAX_TLP_HEADERLOG, 4) :
"Not available")
);
diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h
index 3445c4970e4d..2c801c0c968a 100644
--- a/include/uapi/linux/pci_regs.h
+++ b/include/uapi/linux/pci_regs.h
@@ -486,6 +486,7 @@
#define PCI_EXP_TYPE_RC_EC 0xa /* Root Complex Event Collector */
#define PCI_EXP_FLAGS_SLOT 0x0100 /* Slot implemented */
#define PCI_EXP_FLAGS_IRQ 0x3e00 /* Interrupt message number */
+#define PCI_EXP_FLAGS_FLIT 0x8000 /* Flit Mode Supported */
#define PCI_EXP_DEVCAP 0x04 /* Device capabilities */
#define PCI_EXP_DEVCAP_PAYLOAD 0x00000007 /* Max_Payload_Size */
#define PCI_EXP_DEVCAP_PHANTOM 0x00000018 /* Phantom functions */
@@ -795,6 +796,8 @@
#define PCI_ERR_CAP_ECRC_CHKC 0x00000080 /* ECRC Check Capable */
#define PCI_ERR_CAP_ECRC_CHKE 0x00000100 /* ECRC Check Enable */
#define PCI_ERR_CAP_PREFIX_LOG_PRESENT 0x00000800 /* TLP Prefix Log Present */
+#define PCI_ERR_CAP_TLP_LOG_FLIT 0x00040000 /* TLP was logged in Flit Mode */
+#define PCI_ERR_CAP_TLP_LOG_SIZE 0x00f80000 /* Logged TLP Size (only in Flit mode) */
#define PCI_ERR_HEADER_LOG 0x1c /* Header Log Register (16 bytes) */
#define PCI_ERR_ROOT_COMMAND 0x2c /* Root Error Command */
#define PCI_ERR_ROOT_CMD_COR_EN 0x00000001 /* Correctable Err Reporting Enable */
@@ -1061,8 +1064,9 @@
#define PCI_EXP_DPC_CAP_RP_EXT 0x0020 /* Root Port Extensions */
#define PCI_EXP_DPC_CAP_POISONED_TLP 0x0040 /* Poisoned TLP Egress Blocking Supported */
#define PCI_EXP_DPC_CAP_SW_TRIGGER 0x0080 /* Software Triggering Supported */
-#define PCI_EXP_DPC_RP_PIO_LOG_SIZE 0x0F00 /* RP PIO Log Size */
+#define PCI_EXP_DPC_RP_PIO_LOG_SIZE 0x0F00 /* RP PIO Log Size [3:0] */
#define PCI_EXP_DPC_CAP_DL_ACTIVE 0x1000 /* ERR_COR signal on DL_Active supported */
+#define PCI_EXP_DPC_RP_PIO_LOG_SIZE4 0x2000 /* RP PIO Log Size [4] */
#define PCI_EXP_DPC_CTL 0x06 /* DPC control */
#define PCI_EXP_DPC_CTL_EN_FATAL 0x0001 /* Enable trigger on ERR_FATAL message */
generated by cgit (git 2.34.1) at 2025-06-10 11:03:48 +0000