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Diffstat (limited to 'archive/sg_bus_xfer.c')
| -rw-r--r-- | archive/sg_bus_xfer.c | 194 |
1 files changed, 0 insertions, 194 deletions
diff --git a/archive/sg_bus_xfer.c b/archive/sg_bus_xfer.c deleted file mode 100644 index eada35fd..00000000 --- a/archive/sg_bus_xfer.c +++ /dev/null @@ -1,194 +0,0 @@ -#include <unistd.h> -#include <signal.h> -#include <fcntl.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <limits.h> -#include <sys/ioctl.h> -#include <sys/types.h> -#include <sys/stat.h> -#include "sg_lib.h" -#include "sg_io_linux.h" - -/* Test code for D. Gilbert's extensions to the Linux OS SCSI generic ("sg") - device driver. -* Copyright (C) 2001 D. Gilbert -* This program is free software; you can redistribute it and/or modify -* it under the terms of the GNU General Public License as published by -* the Free Software Foundation; either version 2, or (at your option) -* any later version. - - This program tests the SG_FLAG_BUS_ADDR capability. - It is for moving data to and from fixed memory addresses (e.g. memory - mapped io used by video frame buffers) directly to a SCSI device via - the sg driver. The given address is passed straight through by sg to the - scsi adapter driver. The adapter typically does a "virtual to bus" - address transformation and gives the new address to its DMA engine. - Large amounts of data (in physically contiguous memory) can be moved - (quickly) in a single SCSI command. - - This will probably only work on i386 architecture with PCI cards that - memory map their IO area (e.g. video frame buffer). On i386 the - "virt_to_bus" transformation involves subtracting 0xC0000000 from the - given address. So from the addresses seen in the lspci command, - subtracting 0x40000000 would be an appropriate correction (due to - 32 bit wrap around). - - The SG_FLAG_BUS_ADDR logic is not in normal sg drivers, you need a - patch, see the sg web site. - - Version 0.11 (20010210) -*/ - -#ifndef SG_FLAG_BUS_ADDR -#define SG_FLAG_BUS_ADDR 0x10 -#endif - - -#define S_RW_LEN 10 /* Use SCSI READ(10) and WRITE(10) */ - -#define SGP_READ10 0x28 -#define SGP_WRITE10 0x2a - -/* #define SG_DEBUG */ - - -int main(int argc, char * argv[]) -{ - int sg_fd, res, j, m; - unsigned int k, num; - unsigned char rwCmdBlk[S_RW_LEN]; - unsigned char sense_buffer[32]; - int do_wr = -1; /* 1 -> write, 0 -> read */ - unsigned long addr = ULONG_MAX; - int bs = 512; - int skip = -1; - int count = -1; - char * file_name = 0; - sg_io_hdr_t io_hdr; - - for (j = 1; j < argc; ++j) { - if (0 == strncmp("-a=", argv[j], 3)) { - m = 3; - num = sscanf(argv[j] + m, "%lx", &addr); - if (1 != num) { - printf("Couldn't decode number after '-a=' switch\n"); - file_name = 0; - break; - } - } - else if (0 == strncmp("-bs=", argv[j], 4)) { - m = 4; - bs = sg_get_num(argv[j] + m); - if (-1 == bs) { - printf("Couldn't decode number after '-bs=' switch\n"); - file_name = 0; - break; - } - } - else if (0 == strncmp("-skip=", argv[j], 6)) { - m = 6; - skip = sg_get_num(argv[j] + m); - if (-1 == skip) { - printf("Couldn't decode number after '-skip=' switch\n"); - file_name = 0; - break; - } - } - else if (0 == strncmp("-count=", argv[j], 7)) { - m = 7; - count = sg_get_num(argv[j] + m); - if (-1 == count) { - printf("Couldn't decode number after '-count=' switch\n"); - file_name = 0; - break; - } - } - else if (0 == strcmp("-r", argv[j])) - do_wr = 0; - else if (0 == strcmp("-w", argv[j])) - do_wr = 1; - else if (*argv[j] == '-') { - printf("Unrecognized switch: %s\n", argv[j]); - file_name = 0; - break; - } - else - file_name = argv[j]; - } - if ((0 == file_name) || (count < 0) || (do_wr < 0) || (addr == ULONG_MAX) - || (skip < 0)) { - printf("Probabably missing parameter\n\n"); - printf( - "Usage: 'sg_bus_xfer -r|w -a=hex_num [-bs=num] -skip=num" - " <sg_device>'\n"); - printf(" where: -r|w read from (or write to) sg device\n"); - printf(" -a=hex_num memory address (virtual ?)\n"); - printf(" -bs=num blocks size in bytes (default 512)\n"); - printf(" -skip=num num is blocks to skip/seek on sg dev\n"); - printf(" -count=num num of blocks to xfer\n"); - printf("\n BEWARE you could do damage with this command " - "(needs root access)\n"); - printf("\n bs, skip and count may take k,K,m,M etc multipliers\n"); - return 1; - } - - sg_fd = open(file_name, O_RDWR); - if (sg_fd < 0) { - perror("sg_bus_xfer: open error"); - return 1; - } - /* Don't worry, being very careful not to write to a none-sg file ... */ - res = ioctl(sg_fd, SG_GET_VERSION_NUM, &k); - if ((res < 0) || (k < 30000)) { - printf("sg_bus_xfer: not a sg device, or driver prior to 3.x\n"); - return 1; - } - - memset(rwCmdBlk, 0, S_RW_LEN); - rwCmdBlk[0] = do_wr ? SGP_WRITE10 : SGP_READ10; - rwCmdBlk[2] = (unsigned char)((skip >> 24) & 0xFF); - rwCmdBlk[3] = (unsigned char)((skip >> 16) & 0xFF); - rwCmdBlk[4] = (unsigned char)((skip >> 8) & 0xFF); - rwCmdBlk[5] = (unsigned char)(skip & 0xFF); - rwCmdBlk[6] = (unsigned char)((count >> 16) & 0xff); - rwCmdBlk[7] = (unsigned char)((count >> 8) & 0xff); - rwCmdBlk[8] = (unsigned char)(count & 0xff); - memset(&io_hdr, 0, sizeof(sg_io_hdr_t)); - io_hdr.interface_id = 'S'; - io_hdr.cmd_len = sizeof(rwCmdBlk); - io_hdr.mx_sb_len = sizeof(sense_buffer); - io_hdr.dxfer_direction = do_wr ? SG_DXFER_TO_DEV : SG_DXFER_FROM_DEV; - io_hdr.dxfer_len = bs * count; - // io_hdr.dxferp = malloc(1024 * 1024); /* <<<<<<<<<<<<<<<< */ - io_hdr.dxferp = (void *)addr; - io_hdr.cmdp = rwCmdBlk; - io_hdr.flags = SG_FLAG_BUS_ADDR; - io_hdr.sbp = sense_buffer; - io_hdr.timeout = 10000; /* 10000 millisecs == 10 seconds */ - - printf(" dxferp=%p len=%d\n", io_hdr.dxferp, bs * count); -#ifdef SG_DEBUG - sg_print_command(rwCmdBlk); - printf(" dxferp=%p len=%d\n", io_hdr.dxferp, bs * count); - return 0; -#endif - if (ioctl(sg_fd, SG_IO, &io_hdr) < 0) { - perror("sg_bus_xfer: SG_IO failed"); - return 1; - } - - /* now for the error processing */ - switch (sg_err_category3(&io_hdr)) { - case SG_LIB_CAT_CLEAN: - break; - case SG_LIB_CAT_RECOVERED: - printf("Recovered error, continuing\n"); - break; - default: /* won't bother decoding other categories */ - sg_chk_n_print3("SG_IO error", &io_hdr, 1); - return 1; - } - return 0; -} |