Shuo Liu | ec58beb | 2024-03-11 07:14:07 +0800 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| 2 | |
| 3 | #include <acpi/acpigen_pci.h> |
| 4 | #include <assert.h> |
| 5 | #include <console/console.h> |
| 6 | #include <device/pci.h> |
Shuo Liu | 49437a6 | 2024-04-02 03:28:34 +0800 | [diff] [blame^] | 7 | #include <device/pci_ids.h> |
| 8 | #include <device/pci_def.h> |
| 9 | #include <soc/pci_devs.h> |
Shuo Liu | ec58beb | 2024-03-11 07:14:07 +0800 | [diff] [blame] | 10 | #include <intelblocks/acpi.h> |
| 11 | #include <post.h> |
| 12 | #include <soc/acpi.h> |
| 13 | #include <soc/chip_common.h> |
| 14 | #include <soc/soc_util.h> |
| 15 | #include <soc/util.h> |
| 16 | #include <stdlib.h> |
| 17 | |
| 18 | static const STACK_RES *domain_to_stack_res(const struct device *dev) |
| 19 | { |
| 20 | assert(dev->path.type == DEVICE_PATH_DOMAIN); |
| 21 | const union xeon_domain_path dn = { |
| 22 | .domain_path = dev->path.domain.domain |
| 23 | }; |
| 24 | |
| 25 | const IIO_UDS *hob = get_iio_uds(); |
| 26 | assert(hob != NULL); |
| 27 | |
| 28 | return &hob->PlatformData.IIO_resource[dn.socket].StackRes[dn.stack]; |
| 29 | } |
| 30 | |
| 31 | static void iio_pci_domain_read_resources(struct device *dev) |
| 32 | { |
| 33 | struct resource *res; |
| 34 | const STACK_RES *sr = domain_to_stack_res(dev); |
| 35 | |
| 36 | if (!sr) |
| 37 | return; |
| 38 | |
| 39 | int index = 0; |
| 40 | |
| 41 | if (is_domain0(dev)) { |
| 42 | /* The 0 - 0xfff IO range is not reported by the HOB but still gets decoded */ |
| 43 | res = new_resource(dev, index++); |
| 44 | res->base = 0; |
| 45 | res->size = 0x1000; |
| 46 | res->limit = 0xfff; |
| 47 | res->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE | IORESOURCE_ASSIGNED; |
| 48 | } |
| 49 | |
| 50 | if (sr->PciResourceIoBase < sr->PciResourceIoLimit) { |
| 51 | res = new_resource(dev, index++); |
| 52 | res->base = sr->PciResourceIoBase; |
| 53 | res->limit = sr->PciResourceIoLimit; |
| 54 | res->size = res->limit - res->base + 1; |
| 55 | res->flags = IORESOURCE_IO | IORESOURCE_ASSIGNED; |
| 56 | } |
| 57 | |
| 58 | if (sr->PciResourceMem32Base < sr->PciResourceMem32Limit) { |
| 59 | res = new_resource(dev, index++); |
| 60 | res->base = sr->PciResourceMem32Base; |
| 61 | res->limit = sr->PciResourceMem32Limit; |
| 62 | res->size = res->limit - res->base + 1; |
| 63 | res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED; |
| 64 | } |
| 65 | |
| 66 | if (sr->PciResourceMem64Base < sr->PciResourceMem64Limit) { |
| 67 | res = new_resource(dev, index++); |
| 68 | res->base = sr->PciResourceMem64Base; |
| 69 | res->limit = sr->PciResourceMem64Limit; |
| 70 | res->size = res->limit - res->base + 1; |
| 71 | res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED; |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | /* |
| 76 | * Used by IIO stacks for PCIe bridges. Those contain 1 PCI host bridges, |
| 77 | * all the bus numbers on the IIO stack can be used for this bridge |
| 78 | */ |
| 79 | static struct device_operations iio_pcie_domain_ops = { |
| 80 | .read_resources = iio_pci_domain_read_resources, |
| 81 | .set_resources = pci_domain_set_resources, |
| 82 | .scan_bus = pci_host_bridge_scan_bus, |
| 83 | #if CONFIG(HAVE_ACPI_TABLES) |
| 84 | .acpi_name = soc_acpi_name, |
| 85 | .write_acpi_tables = northbridge_write_acpi_tables, |
| 86 | .acpi_fill_ssdt = pci_domain_fill_ssdt, |
| 87 | #endif |
| 88 | }; |
| 89 | |
| 90 | /* |
| 91 | * Used by UBOX stacks. Those contain multiple PCI host bridges, each having |
| 92 | * only one bus with UBOX devices. UBOX devices have no resources. |
| 93 | */ |
| 94 | static struct device_operations ubox_pcie_domain_ops = { |
| 95 | .read_resources = noop_read_resources, |
| 96 | .set_resources = noop_set_resources, |
| 97 | .scan_bus = pci_host_bridge_scan_bus, |
| 98 | #if CONFIG(HAVE_ACPI_TABLES) |
| 99 | .acpi_name = soc_acpi_name, |
| 100 | .write_acpi_tables = northbridge_write_acpi_tables, |
| 101 | .acpi_fill_ssdt = pci_domain_fill_ssdt, |
| 102 | #endif |
| 103 | }; |
| 104 | |
| 105 | static void create_pcie_domains(const union xeon_domain_path dp, struct bus *upstream, |
| 106 | const STACK_RES *sr, const size_t pci_segment_group) |
| 107 | { |
| 108 | create_domain(dp, upstream, sr->BusBase, sr->BusLimit, DOMAIN_TYPE_PCIE, |
| 109 | &iio_pcie_domain_ops, pci_segment_group); |
| 110 | } |
| 111 | |
| 112 | /* |
| 113 | * On the first Xeon-SP generations there are no separate UBOX stacks, |
| 114 | * and the UBOX devices reside on the first and second IIO. Starting |
| 115 | * with 3rd gen Xeon-SP the UBOX devices are located on their own IIO. |
| 116 | */ |
| 117 | static void create_ubox_domains(const union xeon_domain_path dp, struct bus *upstream, |
| 118 | const STACK_RES *sr, const size_t pci_segment_group) |
| 119 | { |
| 120 | /* Only expect 2 UBOX buses here */ |
| 121 | assert(sr->BusBase + 1 == sr->BusLimit); |
| 122 | |
| 123 | create_domain(dp, upstream, sr->BusBase, sr->BusBase, DOMAIN_TYPE_UBX0, |
| 124 | &ubox_pcie_domain_ops, pci_segment_group); |
| 125 | create_domain(dp, upstream, sr->BusLimit, sr->BusLimit, DOMAIN_TYPE_UBX1, |
| 126 | &ubox_pcie_domain_ops, pci_segment_group); |
| 127 | } |
| 128 | |
| 129 | void create_cxl_domains(const union xeon_domain_path dp, struct bus *bus, |
| 130 | const STACK_RES *sr, const size_t pci_segment_group); |
| 131 | |
| 132 | #if CONFIG(SOC_INTEL_HAS_CXL) |
| 133 | static void iio_cxl_domain_read_resources(struct device *dev) |
| 134 | { |
| 135 | struct resource *res; |
| 136 | const STACK_RES *sr = domain_to_stack_res(dev); |
| 137 | |
| 138 | if (!sr) |
| 139 | return; |
| 140 | |
| 141 | int index = 0; |
| 142 | |
| 143 | if (sr->IoBase < sr->PciResourceIoBase) { |
| 144 | res = new_resource(dev, index++); |
| 145 | res->base = sr->IoBase; |
| 146 | res->limit = sr->PciResourceIoBase - 1; |
| 147 | res->size = res->limit - res->base + 1; |
| 148 | res->flags = IORESOURCE_IO | IORESOURCE_ASSIGNED; |
| 149 | } |
| 150 | |
| 151 | if (sr->Mmio32Base < sr->PciResourceMem32Base) { |
| 152 | res = new_resource(dev, index++); |
| 153 | res->base = sr->Mmio32Base; |
| 154 | res->limit = sr->PciResourceMem32Base - 1; |
| 155 | res->size = res->limit - res->base + 1; |
| 156 | res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED; |
| 157 | } |
| 158 | |
| 159 | if (sr->Mmio64Base < sr->PciResourceMem64Base) { |
| 160 | res = new_resource(dev, index++); |
| 161 | res->base = sr->Mmio64Base; |
| 162 | res->limit = sr->PciResourceMem64Base - 1; |
| 163 | res->size = res->limit - res->base + 1; |
| 164 | res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED; |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | static struct device_operations iio_cxl_domain_ops = { |
| 169 | .read_resources = iio_cxl_domain_read_resources, |
| 170 | .set_resources = pci_domain_set_resources, |
| 171 | .scan_bus = pci_host_bridge_scan_bus, |
| 172 | #if CONFIG(HAVE_ACPI_TABLES) |
| 173 | .acpi_name = soc_acpi_name, |
| 174 | .write_acpi_tables = northbridge_write_acpi_tables, |
| 175 | .acpi_fill_ssdt = pci_domain_fill_ssdt, |
| 176 | #endif |
| 177 | }; |
| 178 | |
| 179 | void create_cxl_domains(const union xeon_domain_path dp, struct bus *bus, |
| 180 | const STACK_RES *sr, const size_t pci_segment_group) |
| 181 | { |
| 182 | assert(sr->BusBase + 1 <= sr->BusLimit); |
| 183 | |
| 184 | /* 1st domain contains PCIe RCiEPs */ |
| 185 | create_domain(dp, bus, sr->BusBase, sr->BusBase, DOMAIN_TYPE_PCIE, |
| 186 | &iio_pcie_domain_ops, pci_segment_group); |
| 187 | /* 2nd domain contains CXL 1.1 end-points */ |
| 188 | create_domain(dp, bus, sr->BusBase + 1, sr->BusLimit, DOMAIN_TYPE_CXL, |
| 189 | &iio_cxl_domain_ops, pci_segment_group); |
| 190 | } |
| 191 | #endif //CONFIG(SOC_INTEL_HAS_CXL) |
| 192 | |
| 193 | void create_xeonsp_domains(const union xeon_domain_path dp, struct bus *bus, |
| 194 | const STACK_RES *sr, const size_t pci_segment_group) |
| 195 | { |
| 196 | if (is_ubox_stack_res(sr)) |
| 197 | create_ubox_domains(dp, bus, sr, pci_segment_group); |
| 198 | else if (CONFIG(SOC_INTEL_HAS_CXL) && is_iio_cxl_stack_res(sr)) |
| 199 | create_cxl_domains(dp, bus, sr, pci_segment_group); |
| 200 | else if (is_pcie_iio_stack_res(sr)) |
| 201 | create_pcie_domains(dp, bus, sr, pci_segment_group); |
| 202 | else if (CONFIG(HAVE_IOAT_DOMAINS) && is_ioat_iio_stack_res(sr)) |
| 203 | create_ioat_domains(dp, bus, sr, pci_segment_group); |
| 204 | } |
Shuo Liu | 49437a6 | 2024-04-02 03:28:34 +0800 | [diff] [blame^] | 205 | |
| 206 | /* |
| 207 | * Route PAM segment access to DRAM |
| 208 | * Only call this code from socket0! |
| 209 | */ |
| 210 | void unlock_pam_regions(void) |
| 211 | { |
| 212 | uint32_t pam0123_unlock_dram = 0x33333330; |
| 213 | uint32_t pam456_unlock_dram = 0x00333333; |
| 214 | /* Get UBOX(1) for socket0 */ |
| 215 | uint32_t bus1 = socket0_get_ubox_busno(PCU_IIO_STACK); |
| 216 | |
| 217 | /* Assume socket0 owns PCI segment 0 */ |
| 218 | pci_io_write_config32(PCI_DEV(bus1, SAD_ALL_DEV, SAD_ALL_FUNC), |
| 219 | SAD_ALL_PAM0123_CSR, pam0123_unlock_dram); |
| 220 | pci_io_write_config32(PCI_DEV(bus1, SAD_ALL_DEV, SAD_ALL_FUNC), |
| 221 | SAD_ALL_PAM456_CSR, pam456_unlock_dram); |
| 222 | |
| 223 | uint32_t reg1 = pci_io_read_config32(PCI_DEV(bus1, SAD_ALL_DEV, |
| 224 | SAD_ALL_FUNC), SAD_ALL_PAM0123_CSR); |
| 225 | uint32_t reg2 = pci_io_read_config32(PCI_DEV(bus1, SAD_ALL_DEV, |
| 226 | SAD_ALL_FUNC), SAD_ALL_PAM456_CSR); |
| 227 | printk(BIOS_DEBUG, "%s:%s pam0123_csr: 0x%x, pam456_csr: 0x%x\n", |
| 228 | __FILE__, __func__, reg1, reg2); |
| 229 | } |