summaryrefslogtreecommitdiffstats
path: root/src/include/ipxe
diff options
context:
space:
mode:
Diffstat (limited to 'src/include/ipxe')
-rw-r--r--src/include/ipxe/ecam.h55
-rw-r--r--src/include/ipxe/ecam_io.h139
-rw-r--r--src/include/ipxe/errfile.h1
-rw-r--r--src/include/ipxe/pci_io.h1
4 files changed, 196 insertions, 0 deletions
diff --git a/src/include/ipxe/ecam.h b/src/include/ipxe/ecam.h
new file mode 100644
index 000000000..0f0fbf4bf
--- /dev/null
+++ b/src/include/ipxe/ecam.h
@@ -0,0 +1,55 @@
+#ifndef _IPXE_ECAM_H
+#define _IPXE_ECAM_H
+
+/** @file
+ *
+ * PCI I/O API for Enhanced Configuration Access Mechanism (ECAM)
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
+
+#include <ipxe/acpi.h>
+#include <ipxe/pci.h>
+
+/** Enhanced Configuration Access Mechanism per-device size */
+#define ECAM_SIZE 4096
+
+/** Enhanced Configuration Access Mechanism table signature */
+#define ECAM_SIGNATURE ACPI_SIGNATURE ( 'M', 'C', 'F', 'G' )
+
+/** An Enhanced Configuration Access Mechanism allocation */
+struct ecam_allocation {
+ /** Base address */
+ uint64_t base;
+ /** PCI segment number */
+ uint16_t segment;
+ /** Start PCI bus number */
+ uint8_t start;
+ /** End PCI bus number */
+ uint8_t end;
+ /** Reserved */
+ uint8_t reserved[4];
+} __attribute__ (( packed ));
+
+/** An Enhanced Configuration Access Mechanism table */
+struct ecam_table {
+ /** ACPI header */
+ struct acpi_header acpi;
+ /** Reserved */
+ uint8_t reserved[8];
+ /** Allocation structures */
+ struct ecam_allocation alloc[0];
+} __attribute__ (( packed ));
+
+/** A mapped Enhanced Configuration Access Mechanism allocation */
+struct ecam_mapping {
+ /** Allocation */
+ struct ecam_allocation alloc;
+ /** PCI bus:dev.fn address range */
+ struct pci_range range;
+ /** MMIO base address */
+ void *regs;
+};
+
+#endif /* _IPXE_ECAM_H */
diff --git a/src/include/ipxe/ecam_io.h b/src/include/ipxe/ecam_io.h
new file mode 100644
index 000000000..4fb24db33
--- /dev/null
+++ b/src/include/ipxe/ecam_io.h
@@ -0,0 +1,139 @@
+#ifndef _IPXE_ECAM_IO_H
+#define _IPXE_ECAM_IO_H
+
+/** @file
+ *
+ * PCI I/O API for Enhanced Configuration Access Mechanism (ECAM)
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
+
+#include <stdint.h>
+
+#ifdef PCIAPI_ECAM
+#define PCIAPI_PREFIX_ecam
+#else
+#define PCIAPI_PREFIX_ecam __ecam_
+#endif
+
+struct pci_device;
+
+/** Construct ECAM location */
+#define ECAM_LOC( where, len ) ( ( (len) << 16 ) | where )
+
+/** Extract offset from ECAM location */
+#define ECAM_WHERE( location ) ( (location) & 0xffff )
+
+/** Extract length from ECAM location */
+#define ECAM_LEN( location ) ( (location) >> 16 )
+
+extern int ecam_read ( struct pci_device *pci, unsigned int location,
+ void *value );
+extern int ecam_write ( struct pci_device *pci, unsigned int location,
+ unsigned long value );
+
+/**
+ * Read byte from PCI configuration space via ECAM
+ *
+ * @v pci PCI device
+ * @v where Location within PCI configuration space
+ * @v value Value read
+ * @ret rc Return status code
+ */
+static inline __always_inline int
+PCIAPI_INLINE ( ecam, pci_read_config_byte ) ( struct pci_device *pci,
+ unsigned int where,
+ uint8_t *value ) {
+ return ecam_read ( pci, ECAM_LOC ( where, sizeof ( *value ) ), value );
+}
+
+/**
+ * Read word from PCI configuration space via ECAM
+ *
+ * @v pci PCI device
+ * @v where Location within PCI configuration space
+ * @v value Value read
+ * @ret rc Return status code
+ */
+static inline __always_inline int
+PCIAPI_INLINE ( ecam, pci_read_config_word ) ( struct pci_device *pci,
+ unsigned int where,
+ uint16_t *value ) {
+ return ecam_read ( pci, ECAM_LOC ( where, sizeof ( *value ) ), value );
+}
+
+/**
+ * Read dword from PCI configuration space via ECAM
+ *
+ * @v pci PCI device
+ * @v where Location within PCI configuration space
+ * @v value Value read
+ * @ret rc Return status code
+ */
+static inline __always_inline int
+PCIAPI_INLINE ( ecam, pci_read_config_dword ) ( struct pci_device *pci,
+ unsigned int where,
+ uint32_t *value ) {
+ return ecam_read ( pci, ECAM_LOC ( where, sizeof ( *value ) ), value );
+}
+
+/**
+ * Write byte to PCI configuration space via ECAM
+ *
+ * @v pci PCI device
+ * @v where Location within PCI configuration space
+ * @v value Value to be written
+ * @ret rc Return status code
+ */
+static inline __always_inline int
+PCIAPI_INLINE ( ecam, pci_write_config_byte ) ( struct pci_device *pci,
+ unsigned int where,
+ uint8_t value ) {
+ return ecam_write ( pci, ECAM_LOC ( where, sizeof ( value ) ), value );
+}
+
+/**
+ * Write word to PCI configuration space via ECAM
+ *
+ * @v pci PCI device
+ * @v where Location within PCI configuration space
+ * @v value Value to be written
+ * @ret rc Return status code
+ */
+static inline __always_inline int
+PCIAPI_INLINE ( ecam, pci_write_config_word ) ( struct pci_device *pci,
+ unsigned int where,
+ uint16_t value ) {
+ return ecam_write ( pci, ECAM_LOC ( where, sizeof ( value ) ), value );
+}
+
+/**
+ * Write dword to PCI configuration space via ECAM
+ *
+ * @v pci PCI device
+ * @v where Location within PCI configuration space
+ * @v value Value to be written
+ * @ret rc Return status code
+ */
+static inline __always_inline int
+PCIAPI_INLINE ( ecam, pci_write_config_dword ) ( struct pci_device *pci,
+ unsigned int where,
+ uint32_t value ) {
+ return ecam_write ( pci, ECAM_LOC ( where, sizeof ( value ) ), value );
+}
+
+/**
+ * Map PCI bus address as an I/O address
+ *
+ * @v bus_addr PCI bus address
+ * @v len Length of region
+ * @ret io_addr I/O address, or NULL on error
+ */
+static inline __always_inline void *
+PCIAPI_INLINE ( ecam, pci_ioremap ) ( struct pci_device *pci __unused,
+ unsigned long bus_addr, size_t len ) {
+ return ioremap ( bus_addr, len );
+}
+
+#endif /* _IPXE_ECAM_IO_H */
diff --git a/src/include/ipxe/errfile.h b/src/include/ipxe/errfile.h
index 9b955e574..2b8adbfd6 100644
--- a/src/include/ipxe/errfile.h
+++ b/src/include/ipxe/errfile.h
@@ -216,6 +216,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#define ERRFILE_slirp ( ERRFILE_DRIVER | 0x00d00000 )
#define ERRFILE_rdc ( ERRFILE_DRIVER | 0x00d10000 )
#define ERRFILE_ice ( ERRFILE_DRIVER | 0x00d20000 )
+#define ERRFILE_ecam ( ERRFILE_DRIVER | 0x00d30000 )
#define ERRFILE_aoe ( ERRFILE_NET | 0x00000000 )
#define ERRFILE_arp ( ERRFILE_NET | 0x00010000 )
diff --git a/src/include/ipxe/pci_io.h b/src/include/ipxe/pci_io.h
index 91359cec8..35d16f95e 100644
--- a/src/include/ipxe/pci_io.h
+++ b/src/include/ipxe/pci_io.h
@@ -58,6 +58,7 @@ struct pci_range {
PROVIDE_SINGLE_API_INLINE ( PCIAPI_PREFIX_ ## _subsys, _api_func )
/* Include all architecture-independent I/O API headers */
+#include <ipxe/ecam_io.h>
#include <ipxe/efi/efi_pci_api.h>
#include <ipxe/linux/linux_pci.h>
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2026-07-30 11:30:54 +0200