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-rw-r--r--hw/cxl/cxl-cdat.c224
-rw-r--r--hw/cxl/meson.build1
-rw-r--r--include/hw/cxl/cxl_cdat.h165
-rw-r--r--include/hw/cxl/cxl_component.h7
-rw-r--r--include/hw/cxl/cxl_device.h3
-rw-r--r--include/hw/cxl/cxl_pci.h1
6 files changed, 401 insertions, 0 deletions
diff --git a/hw/cxl/cxl-cdat.c b/hw/cxl/cxl-cdat.c
new file mode 100644
index 0000000000..3653aa56f0
--- /dev/null
+++ b/hw/cxl/cxl-cdat.c
@@ -0,0 +1,224 @@
+/*
+ * CXL CDAT Structure
+ *
+ * Copyright (C) 2021 Avery Design Systems, Inc.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "hw/pci/pci.h"
+#include "hw/cxl/cxl.h"
+#include "qapi/error.h"
+#include "qemu/error-report.h"
+
+static void cdat_len_check(CDATSubHeader *hdr, Error **errp)
+{
+ assert(hdr->length);
+ assert(hdr->reserved == 0);
+
+ switch (hdr->type) {
+ case CDAT_TYPE_DSMAS:
+ assert(hdr->length == sizeof(CDATDsmas));
+ break;
+ case CDAT_TYPE_DSLBIS:
+ assert(hdr->length == sizeof(CDATDslbis));
+ break;
+ case CDAT_TYPE_DSMSCIS:
+ assert(hdr->length == sizeof(CDATDsmscis));
+ break;
+ case CDAT_TYPE_DSIS:
+ assert(hdr->length == sizeof(CDATDsis));
+ break;
+ case CDAT_TYPE_DSEMTS:
+ assert(hdr->length == sizeof(CDATDsemts));
+ break;
+ case CDAT_TYPE_SSLBIS:
+ assert(hdr->length >= sizeof(CDATSslbisHeader));
+ assert((hdr->length - sizeof(CDATSslbisHeader)) %
+ sizeof(CDATSslbe) == 0);
+ break;
+ default:
+ error_setg(errp, "Type %d is reserved", hdr->type);
+ }
+}
+
+static void ct3_build_cdat(CDATObject *cdat, Error **errp)
+{
+ g_autofree CDATTableHeader *cdat_header = NULL;
+ g_autofree CDATEntry *cdat_st = NULL;
+ uint8_t sum = 0;
+ int ent, i;
+
+ /* Use default table if fopen == NULL */
+ assert(cdat->build_cdat_table);
+
+ cdat_header = g_malloc0(sizeof(*cdat_header));
+ if (!cdat_header) {
+ error_setg(errp, "Failed to allocate CDAT header");
+ return;
+ }
+
+ cdat->built_buf_len = cdat->build_cdat_table(&cdat->built_buf, cdat->private);
+
+ if (!cdat->built_buf_len) {
+ /* Build later as not all data available yet */
+ cdat->to_update = true;
+ return;
+ }
+ cdat->to_update = false;
+
+ cdat_st = g_malloc0(sizeof(*cdat_st) * (cdat->built_buf_len + 1));
+ if (!cdat_st) {
+ error_setg(errp, "Failed to allocate CDAT entry array");
+ return;
+ }
+
+ /* Entry 0 for CDAT header, starts with Entry 1 */
+ for (ent = 1; ent < cdat->built_buf_len + 1; ent++) {
+ CDATSubHeader *hdr = cdat->built_buf[ent - 1];
+ uint8_t *buf = (uint8_t *)cdat->built_buf[ent - 1];
+
+ cdat_st[ent].base = hdr;
+ cdat_st[ent].length = hdr->length;
+
+ cdat_header->length += hdr->length;
+ for (i = 0; i < hdr->length; i++) {
+ sum += buf[i];
+ }
+ }
+
+ /* CDAT header */
+ cdat_header->revision = CXL_CDAT_REV;
+ /* For now, no runtime updates */
+ cdat_header->sequence = 0;
+ cdat_header->length += sizeof(CDATTableHeader);
+ sum += cdat_header->revision + cdat_header->sequence +
+ cdat_header->length;
+ /* Sum of all bytes including checksum must be 0 */
+ cdat_header->checksum = ~sum + 1;
+
+ cdat_st[0].base = g_steal_pointer(&cdat_header);
+ cdat_st[0].length = sizeof(*cdat_header);
+ cdat->entry_len = 1 + cdat->built_buf_len;
+ cdat->entry = g_steal_pointer(&cdat_st);
+}
+
+static void ct3_load_cdat(CDATObject *cdat, Error **errp)
+{
+ g_autofree CDATEntry *cdat_st = NULL;
+ uint8_t sum = 0;
+ int num_ent;
+ int i = 0, ent = 1, file_size = 0;
+ CDATSubHeader *hdr;
+ FILE *fp = NULL;
+
+ /* Read CDAT file and create its cache */
+ fp = fopen(cdat->filename, "r");
+ if (!fp) {
+ error_setg(errp, "CDAT: Unable to open file");
+ return;
+ }
+
+ fseek(fp, 0, SEEK_END);
+ file_size = ftell(fp);
+ fseek(fp, 0, SEEK_SET);
+ cdat->buf = g_malloc0(file_size);
+
+ if (fread(cdat->buf, file_size, 1, fp) == 0) {
+ error_setg(errp, "CDAT: File read failed");
+ return;
+ }
+
+ fclose(fp);
+
+ if (file_size < sizeof(CDATTableHeader)) {
+ error_setg(errp, "CDAT: File too short");
+ return;
+ }
+ i = sizeof(CDATTableHeader);
+ num_ent = 1;
+ while (i < file_size) {
+ hdr = (CDATSubHeader *)(cdat->buf + i);
+ cdat_len_check(hdr, errp);
+ i += hdr->length;
+ num_ent++;
+ }
+ if (i != file_size) {
+ error_setg(errp, "CDAT: File length missmatch");
+ return;
+ }
+
+ cdat_st = g_malloc0(sizeof(*cdat_st) * num_ent);
+ if (!cdat_st) {
+ error_setg(errp, "CDAT: Failed to allocate entry array");
+ return;
+ }
+
+ /* Set CDAT header, Entry = 0 */
+ cdat_st[0].base = cdat->buf;
+ cdat_st[0].length = sizeof(CDATTableHeader);
+ i = 0;
+
+ while (i < cdat_st[0].length) {
+ sum += cdat->buf[i++];
+ }
+
+ /* Read CDAT structures */
+ while (i < file_size) {
+ hdr = (CDATSubHeader *)(cdat->buf + i);
+ cdat_len_check(hdr, errp);
+
+ cdat_st[ent].base = hdr;
+ cdat_st[ent].length = hdr->length;
+
+ while (cdat->buf + i <
+ (uint8_t *)cdat_st[ent].base + cdat_st[ent].length) {
+ assert(i < file_size);
+ sum += cdat->buf[i++];
+ }
+
+ ent++;
+ }
+
+ if (sum != 0) {
+ warn_report("CDAT: Found checksum mismatch in %s", cdat->filename);
+ }
+ cdat->entry_len = num_ent;
+ cdat->entry = g_steal_pointer(&cdat_st);
+}
+
+void cxl_doe_cdat_init(CXLComponentState *cxl_cstate, Error **errp)
+{
+ CDATObject *cdat = &cxl_cstate->cdat;
+
+ if (cdat->filename) {
+ ct3_load_cdat(cdat, errp);
+ } else {
+ ct3_build_cdat(cdat, errp);
+ }
+}
+
+void cxl_doe_cdat_update(CXLComponentState *cxl_cstate, Error **errp)
+{
+ CDATObject *cdat = &cxl_cstate->cdat;
+
+ if (cdat->to_update) {
+ ct3_build_cdat(cdat, errp);
+ }
+}
+
+void cxl_doe_cdat_release(CXLComponentState *cxl_cstate)
+{
+ CDATObject *cdat = &cxl_cstate->cdat;
+
+ free(cdat->entry);
+ if (cdat->built_buf) {
+ cdat->free_cdat_table(cdat->built_buf, cdat->built_buf_len,
+ cdat->private);
+ }
+ if (cdat->buf) {
+ free(cdat->buf);
+ }
+}
diff --git a/hw/cxl/meson.build b/hw/cxl/meson.build
index f117b99949..cfa95ffd40 100644
--- a/hw/cxl/meson.build
+++ b/hw/cxl/meson.build
@@ -4,6 +4,7 @@ softmmu_ss.add(when: 'CONFIG_CXL',
'cxl-device-utils.c',
'cxl-mailbox-utils.c',
'cxl-host.c',
+ 'cxl-cdat.c',
),
if_false: files(
'cxl-host-stubs.c',
diff --git a/include/hw/cxl/cxl_cdat.h b/include/hw/cxl/cxl_cdat.h
new file mode 100644
index 0000000000..52c232e912
--- /dev/null
+++ b/include/hw/cxl/cxl_cdat.h
@@ -0,0 +1,165 @@
+/*
+ * CXL CDAT Structure
+ *
+ * Copyright (C) 2021 Avery Design Systems, Inc.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef CXL_CDAT_H
+#define CXL_CDAT_H
+
+#include "hw/cxl/cxl_pci.h"
+
+/*
+ * Reference:
+ * Coherent Device Attribute Table (CDAT) Specification, Rev. 1.03, July. 2022
+ * Compute Express Link (CXL) Specification, Rev. 3.0, Aug. 2022
+ */
+/* Table Access DOE - CXL r3.0 8.1.11 */
+#define CXL_DOE_TABLE_ACCESS 2
+#define CXL_DOE_PROTOCOL_CDAT ((CXL_DOE_TABLE_ACCESS << 16) | CXL_VENDOR_ID)
+
+/* Read Entry - CXL r3.0 8.1.11.1 */
+#define CXL_DOE_TAB_TYPE_CDAT 0
+#define CXL_DOE_TAB_ENT_MAX 0xFFFF
+
+/* Read Entry Request - CXL r3.0 8.1.11.1 Table 8-13 */
+#define CXL_DOE_TAB_REQ 0
+typedef struct CDATReq {
+ DOEHeader header;
+ uint8_t req_code;
+ uint8_t table_type;
+ uint16_t entry_handle;
+} QEMU_PACKED CDATReq;
+
+/* Read Entry Response - CXL r3.0 8.1.11.1 Table 8-14 */
+#define CXL_DOE_TAB_RSP 0
+typedef struct CDATRsp {
+ DOEHeader header;
+ uint8_t rsp_code;
+ uint8_t table_type;
+ uint16_t entry_handle;
+} QEMU_PACKED CDATRsp;
+
+/* CDAT Table Format - CDAT Table 1 */
+#define CXL_CDAT_REV 2
+typedef struct CDATTableHeader {
+ uint32_t length;
+ uint8_t revision;
+ uint8_t checksum;
+ uint8_t reserved[6];
+ uint32_t sequence;
+} QEMU_PACKED CDATTableHeader;
+
+/* CDAT Structure Types - CDAT Table 2 */
+typedef enum {
+ CDAT_TYPE_DSMAS = 0,
+ CDAT_TYPE_DSLBIS = 1,
+ CDAT_TYPE_DSMSCIS = 2,
+ CDAT_TYPE_DSIS = 3,
+ CDAT_TYPE_DSEMTS = 4,
+ CDAT_TYPE_SSLBIS = 5,
+} CDATType;
+
+typedef struct CDATSubHeader {
+ uint8_t type;
+ uint8_t reserved;
+ uint16_t length;
+} CDATSubHeader;
+
+/* Device Scoped Memory Affinity Structure - CDAT Table 3 */
+typedef struct CDATDsmas {
+ CDATSubHeader header;
+ uint8_t DSMADhandle;
+ uint8_t flags;
+#define CDAT_DSMAS_FLAG_NV (1 << 2)
+#define CDAT_DSMAS_FLAG_SHAREABLE (1 << 3)
+#define CDAT_DSMAS_FLAG_HW_COHERENT (1 << 4)
+#define CDAT_DSMAS_FLAG_DYNAMIC_CAP (1 << 5)
+ uint16_t reserved;
+ uint64_t DPA_base;
+ uint64_t DPA_length;
+} QEMU_PACKED CDATDsmas;
+
+/* Device Scoped Latency and Bandwidth Information Structure - CDAT Table 5 */
+typedef struct CDATDslbis {
+ CDATSubHeader header;
+ uint8_t handle;
+ /* Definitions of these fields refer directly to HMAT fields */
+ uint8_t flags;
+ uint8_t data_type;
+ uint8_t reserved;
+ uint64_t entry_base_unit;
+ uint16_t entry[3];
+ uint16_t reserved2;
+} QEMU_PACKED CDATDslbis;
+
+/* Device Scoped Memory Side Cache Information Structure - CDAT Table 6 */
+typedef struct CDATDsmscis {
+ CDATSubHeader header;
+ uint8_t DSMAS_handle;
+ uint8_t reserved[3];
+ uint64_t memory_side_cache_size;
+ uint32_t cache_attributes;
+} QEMU_PACKED CDATDsmscis;
+
+/* Device Scoped Initiator Structure - CDAT Table 7 */
+typedef struct CDATDsis {
+ CDATSubHeader header;
+ uint8_t flags;
+ uint8_t handle;
+ uint16_t reserved;
+} QEMU_PACKED CDATDsis;
+
+/* Device Scoped EFI Memory Type Structure - CDAT Table 8 */
+typedef struct CDATDsemts {
+ CDATSubHeader header;
+ uint8_t DSMAS_handle;
+ uint8_t EFI_memory_type_attr;
+ uint16_t reserved;
+ uint64_t DPA_offset;
+ uint64_t DPA_length;
+} QEMU_PACKED CDATDsemts;
+
+/* Switch Scoped Latency and Bandwidth Information Structure - CDAT Table 9 */
+typedef struct CDATSslbisHeader {
+ CDATSubHeader header;
+ uint8_t data_type;
+ uint8_t reserved[3];
+ uint64_t entry_base_unit;
+} QEMU_PACKED CDATSslbisHeader;
+
+/* Switch Scoped Latency and Bandwidth Entry - CDAT Table 10 */
+typedef struct CDATSslbe {
+ uint16_t port_x_id;
+ uint16_t port_y_id;
+ uint16_t latency_bandwidth;
+ uint16_t reserved;
+} QEMU_PACKED CDATSslbe;
+
+typedef struct CDATSslbis {
+ CDATSslbisHeader sslbis_header;
+ CDATSslbe sslbe[];
+} QEMU_PACKED CDATSslbis;
+
+typedef struct CDATEntry {
+ void *base;
+ uint32_t length;
+} CDATEntry;
+
+typedef struct CDATObject {
+ CDATEntry *entry;
+ int entry_len;
+
+ int (*build_cdat_table)(CDATSubHeader ***cdat_table, void *priv);
+ void (*free_cdat_table)(CDATSubHeader **cdat_table, int num, void *priv);
+ bool to_update;
+ void *private;
+ char *filename;
+ uint8_t *buf;
+ struct CDATSubHeader **built_buf;
+ int built_buf_len;
+} CDATObject;
+#endif /* CXL_CDAT_H */
diff --git a/include/hw/cxl/cxl_component.h b/include/hw/cxl/cxl_component.h
index 94ec2f07d7..34075cfb72 100644
--- a/include/hw/cxl/cxl_component.h
+++ b/include/hw/cxl/cxl_component.h
@@ -19,6 +19,7 @@
#include "qemu/range.h"
#include "qemu/typedefs.h"
#include "hw/register.h"
+#include "qapi/error.h"
enum reg_type {
CXL2_DEVICE,
@@ -184,6 +185,8 @@ typedef struct cxl_component {
struct PCIDevice *pdev;
};
};
+
+ CDATObject cdat;
} CXLComponentState;
void cxl_component_register_block_init(Object *obj,
@@ -220,4 +223,8 @@ static inline hwaddr cxl_decode_ig(int ig)
CXLComponentState *cxl_get_hb_cstate(PCIHostState *hb);
+void cxl_doe_cdat_init(CXLComponentState *cxl_cstate, Error **errp);
+void cxl_doe_cdat_release(CXLComponentState *cxl_cstate);
+void cxl_doe_cdat_update(CXLComponentState *cxl_cstate, Error **errp);
+
#endif
diff --git a/include/hw/cxl/cxl_device.h b/include/hw/cxl/cxl_device.h
index e4d221cdb3..449b0edfe9 100644
--- a/include/hw/cxl/cxl_device.h
+++ b/include/hw/cxl/cxl_device.h
@@ -243,6 +243,9 @@ struct CXLType3Dev {
AddressSpace hostmem_as;
CXLComponentState cxl_cstate;
CXLDeviceState cxl_dstate;
+
+ /* DOE */
+ DOECap doe_cdat;
};
#define TYPE_CXL_TYPE3 "cxl-type3"
diff --git a/include/hw/cxl/cxl_pci.h b/include/hw/cxl/cxl_pci.h
index 01cf002096..3cb79eca1e 100644
--- a/include/hw/cxl/cxl_pci.h
+++ b/include/hw/cxl/cxl_pci.h
@@ -13,6 +13,7 @@
#include "qemu/compiler.h"
#include "hw/pci/pci.h"
#include "hw/pci/pcie.h"
+#include "hw/cxl/cxl_cdat.h"
#define CXL_VENDOR_ID 0x1e98
generated by cgit v1.2.3 (git 2.26.2) at 2025-03-03 06:44:21 +0000