[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v2 04/12] mini-os: use alloc_file_type() and get_file_from_fd() in tpm_tis
Allocate a file type dynamically via alloc_file_type(). Instead of directly accessing the files[] array use get_file_from_fd(). Make some now local functions static and modify their prototypes to match the file_ops requirements. Signed-off-by: Juergen Gross <jgross@xxxxxxxx> --- include/lib.h | 3 +- include/tpm_tis.h | 6 --- lib/sys.c | 23 --------- tpm_tis.c | 120 ++++++++++++++++++++++++++++++---------------- 4 files changed, 80 insertions(+), 72 deletions(-) diff --git a/include/lib.h b/include/lib.h index 05c7de5..d94d142 100644 --- a/include/lib.h +++ b/include/lib.h @@ -166,8 +166,7 @@ void sanity_check(void); #define FTYPE_TAP 8 #define FTYPE_BLK 9 #define FTYPE_TPMFRONT 10 -#define FTYPE_TPM_TIS 11 -#define FTYPE_N 12 +#define FTYPE_N 11 #define FTYPE_SPARE 16 typedef int file_read_func(int fd, void *buf, size_t nbytes); diff --git a/include/tpm_tis.h b/include/tpm_tis.h index 86e83f1..2af974d 100644 --- a/include/tpm_tis.h +++ b/include/tpm_tis.h @@ -37,14 +37,11 @@ struct tpm_chip; struct tpm_chip* init_tpm_tis(unsigned long baseaddr, int localities, unsigned int irq); struct tpm_chip* init_tpm2_tis(unsigned long baseaddr, int localities, unsigned int irq); -void shutdown_tpm_tis(struct tpm_chip* tpm); int tpm_tis_request_locality(struct tpm_chip* tpm, int locality); int tpm_tis_cmd(struct tpm_chip* tpm, uint8_t* req, size_t reqlen, uint8_t** resp, size_t* resplen); #ifdef HAVE_LIBC -#include <sys/stat.h> -#include <fcntl.h> /* POSIX IO functions: * use tpm_tis_open() to get a file descriptor to the tpm device * use write() on the fd to send a command to the backend. You must @@ -53,9 +50,6 @@ int tpm_tis_cmd(struct tpm_chip* tpm, uint8_t* req, size_t reqlen, uint8_t** res * fstat() to get the size of the response and lseek() to seek on it. */ int tpm_tis_open(struct tpm_chip* tpm); -int tpm_tis_posix_read(int fd, uint8_t* buf, size_t count); -int tpm_tis_posix_write(int fd, const uint8_t* buf, size_t count); -int tpm_tis_posix_fstat(int fd, struct stat* buf); #endif #endif diff --git a/lib/sys.c b/lib/sys.c index d213ae5..4060b42 100644 --- a/lib/sys.c +++ b/lib/sys.c @@ -29,7 +29,6 @@ #include <blkfront.h> #include <fbfront.h> #include <tpmfront.h> -#include <tpm_tis.h> #include <xenbus.h> #include <xenstore.h> #include <poll.h> @@ -349,11 +348,6 @@ int read(int fd, void *buf, size_t nbytes) case FTYPE_TPMFRONT: { return tpmfront_posix_read(fd, buf, nbytes); } -#endif -#ifdef CONFIG_TPM_TIS - case FTYPE_TPM_TIS: { - return tpm_tis_posix_read(fd, buf, nbytes); - } #endif default: break; @@ -399,10 +393,6 @@ int write(int fd, const void *buf, size_t nbytes) #ifdef CONFIG_TPMFRONT case FTYPE_TPMFRONT: return tpmfront_posix_write(fd, buf, nbytes); -#endif -#ifdef CONFIG_TPM_TIS - case FTYPE_TPM_TIS: - return tpm_tis_posix_write(fd, buf, nbytes); #endif default: break; @@ -459,10 +449,6 @@ off_t lseek(int fd, off_t offset, int whence) #ifdef CONFIG_TPMFRONT case FTYPE_TPMFRONT: break; -#endif -#ifdef CONFIG_TPM_TIS - case FTYPE_TPM_TIS: - break; #endif case FTYPE_FILE: break; @@ -515,11 +501,6 @@ int close(int fd) shutdown_tpmfront(files[fd].dev); break; #endif -#ifdef CONFIG_TPM_TIS - case FTYPE_TPM_TIS: - shutdown_tpm_tis(files[fd].dev); - break; -#endif #ifdef CONFIG_KBDFRONT case FTYPE_KBD: shutdown_kbdfront(files[fd].dev); @@ -599,10 +580,6 @@ int fstat(int fd, struct stat *buf) #ifdef CONFIG_TPMFRONT case FTYPE_TPMFRONT: return tpmfront_posix_fstat(fd, buf); -#endif -#ifdef CONFIG_TPM_TIS - case FTYPE_TPM_TIS: - return tpm_tis_posix_fstat(fd, buf); #endif default: break; diff --git a/tpm_tis.c b/tpm_tis.c index 477f555..abea7a1 100644 --- a/tpm_tis.c +++ b/tpm_tis.c @@ -792,6 +792,9 @@ int tpm_tis_send(struct tpm_chip* tpm, uint8_t* buf, size_t len) { int status, burstcnt = 0; int count = 0; uint32_t ordinal; +#ifdef HAVE_LIBC + struct file *file = get_file_from_fd(tpm->fd); +#endif if(tpm_tis_request_locality(tpm, tpm->locality) < 0) { return -EBUSY; @@ -844,9 +847,10 @@ int tpm_tis_send(struct tpm_chip* tpm, uint8_t* buf, size_t len) { } } #ifdef HAVE_LIBC - if(tpm->fd >= 0) { - files[tpm->fd].read = false; - files[tpm->fd].offset = 0; + if ( file ) + { + file->read = false; + file->offset = 0; } #endif return len; @@ -1093,6 +1097,23 @@ ssize_t tpm_getcap(struct tpm_chip *chip, uint32_t subcap_id, cap_t *cap, return rc; } +static void shutdown_tpm_tis(struct tpm_chip* tpm){ + int i; + + printk("Shutting down tpm_tis device\n"); + + iowrite32(TPM_INT_ENABLE(tpm, tpm->locality), ~TPM_GLOBAL_INT_ENABLE); + + /*Unmap all of the mmio pages */ + for(i = 0; i < 5; ++i) { + if(tpm->pages[i] != NULL) { + iounmap(tpm->pages[i], PAGE_SIZE); + tpm->pages[i] = NULL; + } + } + free(tpm); + return; +} struct tpm_chip* init_tpm_tis(unsigned long baseaddr, int localities, unsigned int irq) { @@ -1242,25 +1263,6 @@ abort_egress: return NULL; } -void shutdown_tpm_tis(struct tpm_chip* tpm){ - int i; - - printk("Shutting down tpm_tis device\n"); - - iowrite32(TPM_INT_ENABLE(tpm, tpm->locality), ~TPM_GLOBAL_INT_ENABLE); - - /*Unmap all of the mmio pages */ - for(i = 0; i < 5; ++i) { - if(tpm->pages[i] != NULL) { - iounmap(tpm->pages[i], PAGE_SIZE); - tpm->pages[i] = NULL; - } - } - free(tpm); - return; -} - - int tpm_tis_cmd(struct tpm_chip* tpm, uint8_t* req, size_t reqlen, uint8_t** resp, size_t* resplen) { if(tpm->locality < 0) { @@ -1279,23 +1281,24 @@ int tpm_tis_cmd(struct tpm_chip* tpm, uint8_t* req, size_t reqlen, uint8_t** res } #ifdef HAVE_LIBC -int tpm_tis_open(struct tpm_chip* tpm) +#include <sys/stat.h> +#include <fcntl.h> + +static int tpm_tis_close(int fd) { - /* Silently prevent multiple opens */ - if(tpm->fd != -1) { - return tpm->fd; - } + struct file *file = get_file_from_fd(fd); - tpm->fd = alloc_fd(FTYPE_TPM_TIS); - printk("tpm_tis_open() -> %d\n", tpm->fd); - files[tpm->fd].dev = tpm; - return tpm->fd; + shutdown_tpm_tis(file->dev); + + return 0; } -int tpm_tis_posix_write(int fd, const uint8_t* buf, size_t count) +static int tpm_tis_posix_write(int fd, const void *buf, size_t count) { struct tpm_chip* tpm; - tpm = files[fd].dev; + struct file *file = get_file_from_fd(fd); + + tpm = file->dev; if(tpm->locality < 0) { printk("tpm_tis_posix_write() failed! locality not set!\n"); @@ -1319,11 +1322,13 @@ int tpm_tis_posix_write(int fd, const uint8_t* buf, size_t count) return count; } -int tpm_tis_posix_read(int fd, uint8_t* buf, size_t count) +static int tpm_tis_posix_read(int fd, void *buf, size_t count) { int rc; struct tpm_chip* tpm; - tpm = files[fd].dev; + struct file *file = get_file_from_fd(fd); + + tpm = file->dev; if(count == 0) { return 0; @@ -1337,20 +1342,24 @@ int tpm_tis_posix_read(int fd, uint8_t* buf, size_t count) /* Handle EOF case */ - if(files[fd].offset >= tpm->data_len) { + if ( file->offset >= tpm->data_len ) + { rc = 0; } else { - rc = min(tpm->data_len - files[fd].offset, count); - memcpy(buf, tpm->data_buffer + files[fd].offset, rc); + rc = min(tpm->data_len - file->offset, count); + memcpy(buf, tpm->data_buffer + file->offset, rc); } - files[fd].offset += rc; + file->offset += rc; /* Reset the data pending flag */ return rc; } -int tpm_tis_posix_fstat(int fd, struct stat* buf) + +static int tpm_tis_posix_fstat(int fd, struct stat *buf) { struct tpm_chip* tpm; - tpm = files[fd].dev; + struct file *file = get_file_from_fd(fd); + + tpm = file->dev; buf->st_mode = O_RDWR; buf->st_uid = 0; @@ -1360,6 +1369,35 @@ int tpm_tis_posix_fstat(int fd, struct stat* buf) return 0; } +static struct file_ops tpm_tis_ops = { + .name = "tpm_tis", + .read = tpm_tis_posix_read, + .write = tpm_tis_posix_write, + .lseek = lseek_default, + .close = tpm_tis_close, + .fstat = tpm_tis_posix_fstat, +}; + +int tpm_tis_open(struct tpm_chip* tpm) +{ + struct file *file; + static unsigned int ftype_tis; + + /* Silently prevent multiple opens */ + if(tpm->fd != -1) { + return tpm->fd; + } + + if ( !ftype_tis ) + ftype_tis = alloc_file_type(&tpm_tis_ops); + + tpm->fd = alloc_fd(ftype_tis); + printk("tpm_tis_open() -> %d\n", tpm->fd); + file = get_file_from_fd(tpm->fd); + file->dev = tpm; + return tpm->fd; +} + /* TPM 2.0 */ /*TPM2.0 Selftest*/ -- 2.26.2
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