diff options
| -rw-r--r-- | src/drivers/net/efi/nii.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/src/drivers/net/efi/nii.c b/src/drivers/net/efi/nii.c index 1700b4bd..2d87e0c6 100644 --- a/src/drivers/net/efi/nii.c +++ b/src/drivers/net/efi/nii.c @@ -25,6 +25,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); #include <string.h> #include <strings.h> +#include <stdlib.h> #include <unistd.h> #include <errno.h> #include <ipxe/netdevice.h> @@ -137,6 +138,16 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); */ #define PCI_MAX_BAR 6 +/** An NII memory mapping */ +struct nii_mapping { + /** List of mappings */ + struct list_head list; + /** Mapped address */ + UINT64 addr; + /** Mapping cookie created by PCI I/O protocol */ + VOID *mapping; +}; + /** An NII NIC */ struct nii_nic { /** EFI device */ @@ -179,6 +190,9 @@ struct nii_nic { struct io_buffer *txbuf; /** Current receive buffer */ struct io_buffer *rxbuf; + + /** Mapping list */ + struct list_head mappings; }; /** Maximum number of received packets per poll */ @@ -280,7 +294,19 @@ static int nii_pci_open ( struct nii_nic *nii ) { */ static void nii_pci_close ( struct nii_nic *nii ) { EFI_BOOT_SERVICES *bs = efi_systab->BootServices; + struct nii_mapping *map; + struct nii_mapping *tmp; + + /* Remove any stale mappings */ + list_for_each_entry_safe ( map, tmp, &nii->mappings, list ) { + DBGC ( nii, "NII %s removing stale mapping %#llx\n", + nii->dev.name, ( ( unsigned long long ) map->addr ) ); + nii->pci_io->Unmap ( nii->pci_io, map->mapping ); + list_del ( &map->list ); + free ( map ); + } + /* Close protocols */ bs->CloseProtocol ( nii->pci_device, &efi_pci_io_protocol_guid, efi_image_handle, nii->efidev->device ); } @@ -332,6 +358,139 @@ static EFIAPI VOID nii_io ( UINT64 unique_id, UINT8 op, UINT8 len, UINT64 addr, } /** + * Map callback + * + * @v unique_id NII NIC + * @v addr Address of memory to be mapped + * @v len Length of memory to be mapped + * @v dir Direction of data flow + * @v mapped Device mapped address to fill in + */ +static EFIAPI VOID nii_map ( UINT64 unique_id, UINT64 addr, UINT32 len, + UINT32 dir, UINT64 mapped ) { + struct nii_nic *nii = ( ( void * ) ( intptr_t ) unique_id ); + EFI_PHYSICAL_ADDRESS *phys = ( ( void * ) ( intptr_t ) mapped ); + EFI_PCI_IO_PROTOCOL_OPERATION op; + struct nii_mapping *map; + UINTN count = len; + EFI_STATUS efirc; + int rc; + + /* Return a zero mapped address on failure */ + *phys = 0; + + /* Determine PCI mapping operation */ + switch ( dir ) { + case TO_AND_FROM_DEVICE: + op = EfiPciIoOperationBusMasterCommonBuffer; + break; + case FROM_DEVICE: + op = EfiPciIoOperationBusMasterWrite; + break; + case TO_DEVICE: + op = EfiPciIoOperationBusMasterRead; + break; + default: + DBGC ( nii, "NII %s unsupported mapping direction %d\n", + nii->dev.name, dir ); + goto err_dir; + } + + /* Allocate a mapping record */ + map = zalloc ( sizeof ( *map ) ); + if ( ! map ) + goto err_alloc; + map->addr = addr; + + /* Create map */ + if ( ( efirc = nii->pci_io->Map ( nii->pci_io, op, + ( ( void * ) ( intptr_t ) addr ), + &count, phys, &map->mapping ) ) != 0){ + rc = -EEFI ( efirc ); + DBGC ( nii, "NII %s map operation failed: %s\n", + nii->dev.name, strerror ( rc ) ); + goto err_map; + } + + /* Add to list of mappings */ + list_add ( &map->list, &nii->mappings ); + DBGC2 ( nii, "NII %s mapped %#llx+%#x->%#llx\n", + nii->dev.name, ( ( unsigned long long ) addr ), + len, ( ( unsigned long long ) *phys ) ); + return; + + list_del ( &map->list ); + err_map: + free ( map ); + err_alloc: + err_dir: + return; +} + +/** + * Unmap callback + * + * @v unique_id NII NIC + * @v addr Address of mapped memory + * @v len Length of mapped memory + * @v dir Direction of data flow + * @v mapped Device mapped address + */ +static EFIAPI VOID nii_unmap ( UINT64 unique_id, UINT64 addr, UINT32 len, + UINT32 dir __unused, UINT64 mapped ) { + struct nii_nic *nii = ( ( void * ) ( intptr_t ) unique_id ); + struct nii_mapping *map; + + /* Locate mapping record */ + list_for_each_entry ( map, &nii->mappings, list ) { + if ( map->addr == addr ) { + nii->pci_io->Unmap ( nii->pci_io, map->mapping ); + list_del ( &map->list ); + free ( map ); + DBGC2 ( nii, "NII %s unmapped %#llx+%#x->%#llx\n", + nii->dev.name, ( ( unsigned long long ) addr ), + len, ( ( unsigned long long ) mapped ) ); + return; + } + } + + DBGC ( nii, "NII %s non-existent mapping %#llx+%#x->%#llx\n", + nii->dev.name, ( ( unsigned long long ) addr ), + len, ( ( unsigned long long ) mapped ) ); +} + +/** + * Sync callback + * + * @v unique_id NII NIC + * @v addr Address of mapped memory + * @v len Length of mapped memory + * @v dir Direction of data flow + * @v mapped Device mapped address + */ +static EFIAPI VOID nii_sync ( UINT64 unique_id __unused, UINT64 addr, + UINT32 len, UINT32 dir, UINT64 mapped ) { + const void *src; + void *dst; + + /* Do nothing if this is an identity mapping */ + if ( addr == mapped ) + return; + + /* Determine direction */ + if ( dir == FROM_DEVICE ) { + src = ( ( void * ) ( intptr_t ) mapped ); + dst = ( ( void * ) ( intptr_t ) addr ); + } else { + src = ( ( void * ) ( intptr_t ) addr ); + dst = ( ( void * ) ( intptr_t ) mapped ); + } + + /* Copy data */ + memcpy ( dst, src, len ); +} + +/** * Delay callback * * @v unique_id NII NIC @@ -499,6 +658,9 @@ static int nii_start_undi ( struct nii_nic *nii ) { cpb.Delay = ( ( intptr_t ) nii_delay ); cpb.Block = ( ( intptr_t ) nii_block ); cpb.Mem_IO = ( ( intptr_t ) nii_io ); + cpb.Map_Mem = ( ( intptr_t ) nii_map ); + cpb.UnMap_Mem = ( ( intptr_t ) nii_unmap ); + cpb.Sync_Mem = ( ( intptr_t ) nii_sync ); cpb.Unique_ID = ( ( intptr_t ) nii ); /* Issue command */ @@ -1063,6 +1225,7 @@ int nii_start ( struct efi_device *efidev ) { netdev_init ( netdev, &nii_operations ); nii = netdev->priv; nii->efidev = efidev; + INIT_LIST_HEAD ( &nii->mappings ); netdev->ll_broadcast = nii->broadcast; efidev_set_drvdata ( efidev, netdev ); |