diff options
Diffstat (limited to 'hw/pci-bridge/cxl_upstream.c')
| -rw-r--r-- | hw/pci-bridge/cxl_upstream.c | 195 |
1 files changed, 194 insertions, 1 deletions
diff --git a/hw/pci-bridge/cxl_upstream.c b/hw/pci-bridge/cxl_upstream.c index a83a3e8..9b8b57d 100644 --- a/hw/pci-bridge/cxl_upstream.c +++ b/hw/pci-bridge/cxl_upstream.c @@ -10,11 +10,12 @@ #include "qemu/osdep.h" #include "qemu/log.h" +#include "hw/qdev-properties.h" #include "hw/pci/msi.h" #include "hw/pci/pcie.h" #include "hw/pci/pcie_port.h" -#define CXL_UPSTREAM_PORT_MSI_NR_VECTOR 1 +#define CXL_UPSTREAM_PORT_MSI_NR_VECTOR 2 #define CXL_UPSTREAM_PORT_MSI_OFFSET 0x70 #define CXL_UPSTREAM_PORT_PCIE_CAP_OFFSET 0x90 @@ -28,6 +29,7 @@ typedef struct CXLUpstreamPort { /*< public >*/ CXLComponentState cxl_cstate; + DOECap doe_cdat; } CXLUpstreamPort; CXLComponentState *cxl_usp_to_cstate(CXLUpstreamPort *usp) @@ -60,6 +62,9 @@ static void cxl_usp_dvsec_write_config(PCIDevice *dev, uint32_t addr, static void cxl_usp_write_config(PCIDevice *d, uint32_t address, uint32_t val, int len) { + CXLUpstreamPort *usp = CXL_USP(d); + + pcie_doe_write_config(&usp->doe_cdat, address, val, len); pci_bridge_write_config(d, address, val, len); pcie_cap_flr_write_config(d, address, val, len); pcie_aer_write_config(d, address, val, len); @@ -67,6 +72,18 @@ static void cxl_usp_write_config(PCIDevice *d, uint32_t address, cxl_usp_dvsec_write_config(d, address, val, len); } +static uint32_t cxl_usp_read_config(PCIDevice *d, uint32_t address, int len) +{ + CXLUpstreamPort *usp = CXL_USP(d); + uint32_t val; + + if (pcie_doe_read_config(&usp->doe_cdat, address, len, &val)) { + return val; + } + + return pci_default_read_config(d, address, len); +} + static void latch_registers(CXLUpstreamPort *usp) { uint32_t *reg_state = usp->cxl_cstate.crb.cache_mem_registers; @@ -119,6 +136,167 @@ static void build_dvsecs(CXLComponentState *cxl) REG_LOC_DVSEC_REVID, dvsec); } +static bool cxl_doe_cdat_rsp(DOECap *doe_cap) +{ + CDATObject *cdat = &CXL_USP(doe_cap->pdev)->cxl_cstate.cdat; + uint16_t ent; + void *base; + uint32_t len; + CDATReq *req = pcie_doe_get_write_mbox_ptr(doe_cap); + CDATRsp rsp; + + cxl_doe_cdat_update(&CXL_USP(doe_cap->pdev)->cxl_cstate, &error_fatal); + assert(cdat->entry_len); + + /* Discard if request length mismatched */ + if (pcie_doe_get_obj_len(req) < + DIV_ROUND_UP(sizeof(CDATReq), sizeof(uint32_t))) { + return false; + } + + ent = req->entry_handle; + base = cdat->entry[ent].base; + len = cdat->entry[ent].length; + + rsp = (CDATRsp) { + .header = { + .vendor_id = CXL_VENDOR_ID, + .data_obj_type = CXL_DOE_TABLE_ACCESS, + .reserved = 0x0, + .length = DIV_ROUND_UP((sizeof(rsp) + len), sizeof(uint32_t)), + }, + .rsp_code = CXL_DOE_TAB_RSP, + .table_type = CXL_DOE_TAB_TYPE_CDAT, + .entry_handle = (ent < cdat->entry_len - 1) ? + ent + 1 : CXL_DOE_TAB_ENT_MAX, + }; + + memcpy(doe_cap->read_mbox, &rsp, sizeof(rsp)); + memcpy(doe_cap->read_mbox + DIV_ROUND_UP(sizeof(rsp), sizeof(uint32_t)), + base, len); + + doe_cap->read_mbox_len += rsp.header.length; + + return true; +} + +static DOEProtocol doe_cdat_prot[] = { + { CXL_VENDOR_ID, CXL_DOE_TABLE_ACCESS, cxl_doe_cdat_rsp }, + { } +}; + +enum { + CXL_USP_CDAT_SSLBIS_LAT, + CXL_USP_CDAT_SSLBIS_BW, + CXL_USP_CDAT_NUM_ENTRIES +}; + +static int build_cdat_table(CDATSubHeader ***cdat_table, void *priv) +{ + g_autofree CDATSslbis *sslbis_latency = NULL; + g_autofree CDATSslbis *sslbis_bandwidth = NULL; + CXLUpstreamPort *us = CXL_USP(priv); + PCIBus *bus = &PCI_BRIDGE(us)->sec_bus; + int devfn, sslbis_size, i; + int count = 0; + uint16_t port_ids[256]; + + for (devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) { + PCIDevice *d = bus->devices[devfn]; + PCIEPort *port; + + if (!d || !pci_is_express(d) || !d->exp.exp_cap) { + continue; + } + + /* + * Whilst the PCI express spec doesn't allow anything other than + * downstream ports on this bus, let us be a little paranoid + */ + if (!object_dynamic_cast(OBJECT(d), TYPE_PCIE_PORT)) { + continue; + } + + port = PCIE_PORT(d); + port_ids[count] = port->port; + count++; + } + + /* May not yet have any ports - try again later */ + if (count == 0) { + return 0; + } + + sslbis_size = sizeof(CDATSslbis) + sizeof(*sslbis_latency->sslbe) * count; + sslbis_latency = g_malloc(sslbis_size); + if (!sslbis_latency) { + return -ENOMEM; + } + *sslbis_latency = (CDATSslbis) { + .sslbis_header = { + .header = { + .type = CDAT_TYPE_SSLBIS, + .length = sslbis_size, + }, + .data_type = HMATLB_DATA_TYPE_ACCESS_LATENCY, + .entry_base_unit = 10000, + }, + }; + + for (i = 0; i < count; i++) { + sslbis_latency->sslbe[i] = (CDATSslbe) { + .port_x_id = CDAT_PORT_ID_USP, + .port_y_id = port_ids[i], + .latency_bandwidth = 15, /* 150ns */ + }; + } + + sslbis_bandwidth = g_malloc(sslbis_size); + if (!sslbis_bandwidth) { + return 0; + } + *sslbis_bandwidth = (CDATSslbis) { + .sslbis_header = { + .header = { + .type = CDAT_TYPE_SSLBIS, + .length = sslbis_size, + }, + .data_type = HMATLB_DATA_TYPE_ACCESS_BANDWIDTH, + .entry_base_unit = 1000, + }, + }; + + for (i = 0; i < count; i++) { + sslbis_bandwidth->sslbe[i] = (CDATSslbe) { + .port_x_id = CDAT_PORT_ID_USP, + .port_y_id = port_ids[i], + .latency_bandwidth = 16, /* 16 GB/s */ + }; + } + + *cdat_table = g_malloc0(sizeof(*cdat_table) * CXL_USP_CDAT_NUM_ENTRIES); + if (!*cdat_table) { + return -ENOMEM; + } + + /* Header always at start of structure */ + (*cdat_table)[CXL_USP_CDAT_SSLBIS_LAT] = g_steal_pointer(&sslbis_latency); + (*cdat_table)[CXL_USP_CDAT_SSLBIS_BW] = g_steal_pointer(&sslbis_bandwidth); + + return CXL_USP_CDAT_NUM_ENTRIES; +} + +static void free_default_cdat_table(CDATSubHeader **cdat_table, int num, + void *priv) +{ + int i; + + for (i = 0; i < num; i++) { + g_free(cdat_table[i]); + } + g_free(cdat_table); +} + static void cxl_usp_realize(PCIDevice *d, Error **errp) { PCIEPort *p = PCIE_PORT(d); @@ -161,6 +339,14 @@ static void cxl_usp_realize(PCIDevice *d, Error **errp) PCI_BASE_ADDRESS_MEM_TYPE_64, component_bar); + pcie_doe_init(d, &usp->doe_cdat, cxl_cstate->dvsec_offset, doe_cdat_prot, + true, 1); + + cxl_cstate->cdat.build_cdat_table = build_cdat_table; + cxl_cstate->cdat.free_cdat_table = free_default_cdat_table; + cxl_cstate->cdat.private = d; + cxl_doe_cdat_init(cxl_cstate, errp); + return; err_cap: @@ -179,6 +365,11 @@ static void cxl_usp_exitfn(PCIDevice *d) pci_bridge_exitfn(d); } +static Property cxl_upstream_props[] = { + DEFINE_PROP_STRING("cdat", CXLUpstreamPort, cxl_cstate.cdat.filename), + DEFINE_PROP_END_OF_LIST() +}; + static void cxl_upstream_class_init(ObjectClass *oc, void *data) { DeviceClass *dc = DEVICE_CLASS(oc); @@ -186,6 +377,7 @@ static void cxl_upstream_class_init(ObjectClass *oc, void *data) k->is_bridge = true; k->config_write = cxl_usp_write_config; + k->config_read = cxl_usp_read_config; k->realize = cxl_usp_realize; k->exit = cxl_usp_exitfn; k->vendor_id = 0x19e5; /* Huawei */ @@ -194,6 +386,7 @@ static void cxl_upstream_class_init(ObjectClass *oc, void *data) set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); dc->desc = "CXL Switch Upstream Port"; dc->reset = cxl_usp_reset; + device_class_set_props(dc, cxl_upstream_props); } static const TypeInfo cxl_usp_info = { |