diff options
| -rw-r--r-- | drivers/block/floppy.c | 194 |
1 files changed, 98 insertions, 96 deletions
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c index d771579df57e..0d5333570544 100644 --- a/drivers/block/floppy.c +++ b/drivers/block/floppy.c @@ -309,23 +309,23 @@ static bool initialized; #define PH_HEAD(floppy, head) (((((floppy)->stretch & 2) >> 1) ^ head) << 2) #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH) -/* read/write */ -#define COMMAND (raw_cmd->cmd[0]) -#define DR_SELECT (raw_cmd->cmd[1]) -#define TRACK (raw_cmd->cmd[2]) -#define HEAD (raw_cmd->cmd[3]) -#define SECTOR (raw_cmd->cmd[4]) -#define SIZECODE (raw_cmd->cmd[5]) -#define SECT_PER_TRACK (raw_cmd->cmd[6]) -#define GAP (raw_cmd->cmd[7]) -#define SIZECODE2 (raw_cmd->cmd[8]) +/* read/write commands */ +#define COMMAND 0 +#define DR_SELECT 1 +#define TRACK 2 +#define HEAD 3 +#define SECTOR 4 +#define SIZECODE 5 +#define SECT_PER_TRACK 6 +#define GAP 7 +#define SIZECODE2 8 #define NR_RW 9 -/* format */ -#define F_SIZECODE (raw_cmd->cmd[2]) -#define F_SECT_PER_TRACK (raw_cmd->cmd[3]) -#define F_GAP (raw_cmd->cmd[4]) -#define F_FILL (raw_cmd->cmd[5]) +/* format commands */ +#define F_SIZECODE 2 +#define F_SECT_PER_TRACK 3 +#define F_GAP 4 +#define F_FILL 5 #define NR_F 6 /* @@ -2124,28 +2124,28 @@ static void setup_format_params(int track) FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK); raw_cmd->rate = _floppy->rate & 0x43; raw_cmd->cmd_count = NR_F; - COMMAND = FM_MODE(_floppy, FD_FORMAT); - DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, format_req.head); - F_SIZECODE = FD_SIZECODE(_floppy); - F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE; - F_GAP = _floppy->fmt_gap; - F_FILL = FD_FILL_BYTE; + raw_cmd->cmd[COMMAND] = FM_MODE(_floppy, FD_FORMAT); + raw_cmd->cmd[DR_SELECT] = UNIT(current_drive) + PH_HEAD(_floppy, format_req.head); + raw_cmd->cmd[F_SIZECODE] = FD_SIZECODE(_floppy); + raw_cmd->cmd[F_SECT_PER_TRACK] = _floppy->sect << 2 >> raw_cmd->cmd[F_SIZECODE]; + raw_cmd->cmd[F_GAP] = _floppy->fmt_gap; + raw_cmd->cmd[F_FILL] = FD_FILL_BYTE; raw_cmd->kernel_data = floppy_track_buffer; - raw_cmd->length = 4 * F_SECT_PER_TRACK; + raw_cmd->length = 4 * raw_cmd->cmd[F_SECT_PER_TRACK]; - if (!F_SECT_PER_TRACK) + if (!raw_cmd->cmd[F_SECT_PER_TRACK]) return; /* allow for about 30ms for data transport per track */ - head_shift = (F_SECT_PER_TRACK + 5) / 6; + head_shift = (raw_cmd->cmd[F_SECT_PER_TRACK] + 5) / 6; /* a ``cylinder'' is two tracks plus a little stepping time */ track_shift = 2 * head_shift + 3; /* position of logical sector 1 on this track */ n = (track_shift * format_req.track + head_shift * format_req.head) - % F_SECT_PER_TRACK; + % raw_cmd->cmd[F_SECT_PER_TRACK]; /* determine interleave */ il = 1; @@ -2153,27 +2153,27 @@ static void setup_format_params(int track) il++; /* initialize field */ - for (count = 0; count < F_SECT_PER_TRACK; ++count) { + for (count = 0; count < raw_cmd->cmd[F_SECT_PER_TRACK]; ++count) { here[count].track = format_req.track; here[count].head = format_req.head; here[count].sect = 0; - here[count].size = F_SIZECODE; + here[count].size = raw_cmd->cmd[F_SIZECODE]; } /* place logical sectors */ - for (count = 1; count <= F_SECT_PER_TRACK; ++count) { + for (count = 1; count <= raw_cmd->cmd[F_SECT_PER_TRACK]; ++count) { here[n].sect = count; - n = (n + il) % F_SECT_PER_TRACK; + n = (n + il) % raw_cmd->cmd[F_SECT_PER_TRACK]; if (here[n].sect) { /* sector busy, find next free sector */ ++n; - if (n >= F_SECT_PER_TRACK) { - n -= F_SECT_PER_TRACK; + if (n >= raw_cmd->cmd[F_SECT_PER_TRACK]) { + n -= raw_cmd->cmd[F_SECT_PER_TRACK]; while (here[n].sect) ++n; } } } if (_floppy->stretch & FD_SECTBASEMASK) { - for (count = 0; count < F_SECT_PER_TRACK; count++) + for (count = 0; count < raw_cmd->cmd[F_SECT_PER_TRACK]; count++) here[count].sect += FD_SECTBASE(_floppy) - 1; } } @@ -2303,32 +2303,32 @@ static void rw_interrupt(void) drive_state[current_drive].first_read_date = jiffies; nr_sectors = 0; - ssize = DIV_ROUND_UP(1 << SIZECODE, 4); + ssize = DIV_ROUND_UP(1 << raw_cmd->cmd[SIZECODE], 4); if (ST1 & ST1_EOC) eoc = 1; else eoc = 0; - if (COMMAND & 0x80) + if (raw_cmd->cmd[COMMAND] & 0x80) heads = 2; else heads = 1; - nr_sectors = (((R_TRACK - TRACK) * heads + - R_HEAD - HEAD) * SECT_PER_TRACK + - R_SECTOR - SECTOR + eoc) << SIZECODE >> 2; + nr_sectors = (((R_TRACK - raw_cmd->cmd[TRACK]) * heads + + R_HEAD - raw_cmd->cmd[HEAD]) * raw_cmd->cmd[SECT_PER_TRACK] + + R_SECTOR - raw_cmd->cmd[SECTOR] + eoc) << raw_cmd->cmd[SIZECODE] >> 2; if (nr_sectors / ssize > DIV_ROUND_UP(in_sector_offset + current_count_sectors, ssize)) { DPRINT("long rw: %x instead of %lx\n", nr_sectors, current_count_sectors); - pr_info("rs=%d s=%d\n", R_SECTOR, SECTOR); - pr_info("rh=%d h=%d\n", R_HEAD, HEAD); - pr_info("rt=%d t=%d\n", R_TRACK, TRACK); + pr_info("rs=%d s=%d\n", R_SECTOR, raw_cmd->cmd[SECTOR]); + pr_info("rh=%d h=%d\n", R_HEAD, raw_cmd->cmd[HEAD]); + pr_info("rt=%d t=%d\n", R_TRACK, raw_cmd->cmd[TRACK]); pr_info("heads=%d eoc=%d\n", heads, eoc); pr_info("spt=%d st=%d ss=%d\n", - SECT_PER_TRACK, fsector_t, ssize); + raw_cmd->cmd[SECT_PER_TRACK], fsector_t, ssize); pr_info("in_sector_offset=%d\n", in_sector_offset); } @@ -2366,11 +2366,11 @@ static void rw_interrupt(void) probing = 0; } - if (CT(COMMAND) != FD_READ || + if (CT(raw_cmd->cmd[COMMAND]) != FD_READ || raw_cmd->kernel_data == bio_data(current_req->bio)) { /* transfer directly from buffer */ cont->done(1); - } else if (CT(COMMAND) == FD_READ) { + } else if (CT(raw_cmd->cmd[COMMAND]) == FD_READ) { buffer_track = raw_cmd->track; buffer_drive = current_drive; INFBOUND(buffer_max, nr_sectors + fsector_t); @@ -2429,13 +2429,13 @@ static void copy_buffer(int ssize, int max_sector, int max_sector_2) min(max_sector, max_sector_2), blk_rq_sectors(current_req)); - if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE && + if (current_count_sectors <= 0 && CT(raw_cmd->cmd[COMMAND]) == FD_WRITE && buffer_max > fsector_t + blk_rq_sectors(current_req)) current_count_sectors = min_t(int, buffer_max - fsector_t, blk_rq_sectors(current_req)); remaining = current_count_sectors << 9; - if (remaining > blk_rq_bytes(current_req) && CT(COMMAND) == FD_WRITE) { + if (remaining > blk_rq_bytes(current_req) && CT(raw_cmd->cmd[COMMAND]) == FD_WRITE) { DPRINT("in copy buffer\n"); pr_info("current_count_sectors=%ld\n", current_count_sectors); pr_info("remaining=%d\n", remaining >> 9); @@ -2470,16 +2470,16 @@ static void copy_buffer(int ssize, int max_sector, int max_sector_2) fsector_t, buffer_min); pr_info("current_count_sectors=%ld\n", current_count_sectors); - if (CT(COMMAND) == FD_READ) + if (CT(raw_cmd->cmd[COMMAND]) == FD_READ) pr_info("read\n"); - if (CT(COMMAND) == FD_WRITE) + if (CT(raw_cmd->cmd[COMMAND]) == FD_WRITE) pr_info("write\n"); break; } if (((unsigned long)buffer) % 512) DPRINT("%p buffer not aligned\n", buffer); - if (CT(COMMAND) == FD_READ) + if (CT(raw_cmd->cmd[COMMAND]) == FD_READ) memcpy(buffer, dma_buffer, size); else memcpy(dma_buffer, buffer, size); @@ -2497,7 +2497,7 @@ static void copy_buffer(int ssize, int max_sector, int max_sector_2) /* work around a bug in pseudo DMA * (on some FDCs) pseudo DMA does not stop when the CPU stops * sending data. Hence we need a different way to signal the - * transfer length: We use SECT_PER_TRACK. Unfortunately, this + * transfer length: We use raw_cmd->cmd[SECT_PER_TRACK]. Unfortunately, this * does not work with MT, hence we can only transfer one head at * a time */ @@ -2506,18 +2506,18 @@ static void virtualdmabug_workaround(void) int hard_sectors; int end_sector; - if (CT(COMMAND) == FD_WRITE) { - COMMAND &= ~0x80; /* switch off multiple track mode */ + if (CT(raw_cmd->cmd[COMMAND]) == FD_WRITE) { + raw_cmd->cmd[COMMAND] &= ~0x80; /* switch off multiple track mode */ - hard_sectors = raw_cmd->length >> (7 + SIZECODE); - end_sector = SECTOR + hard_sectors - 1; - if (end_sector > SECT_PER_TRACK) { + hard_sectors = raw_cmd->length >> (7 + raw_cmd->cmd[SIZECODE]); + end_sector = raw_cmd->cmd[SECTOR] + hard_sectors - 1; + if (end_sector > raw_cmd->cmd[SECT_PER_TRACK]) { pr_info("too many sectors %d > %d\n", - end_sector, SECT_PER_TRACK); + end_sector, raw_cmd->cmd[SECT_PER_TRACK]); return; } - SECT_PER_TRACK = end_sector; - /* make sure SECT_PER_TRACK + raw_cmd->cmd[SECT_PER_TRACK] = end_sector; + /* make sure raw_cmd->cmd[SECT_PER_TRACK] * points to end of transfer */ } } @@ -2550,10 +2550,10 @@ static int make_raw_rw_request(void) raw_cmd->cmd_count = NR_RW; if (rq_data_dir(current_req) == READ) { raw_cmd->flags |= FD_RAW_READ; - COMMAND = FM_MODE(_floppy, FD_READ); + raw_cmd->cmd[COMMAND] = FM_MODE(_floppy, FD_READ); } else if (rq_data_dir(current_req) == WRITE) { raw_cmd->flags |= FD_RAW_WRITE; - COMMAND = FM_MODE(_floppy, FD_WRITE); + raw_cmd->cmd[COMMAND] = FM_MODE(_floppy, FD_WRITE); } else { DPRINT("%s: unknown command\n", __func__); return 0; @@ -2561,16 +2561,16 @@ static int make_raw_rw_request(void) max_sector = _floppy->sect * _floppy->head; - TRACK = (int)blk_rq_pos(current_req) / max_sector; + raw_cmd->cmd[TRACK] = (int)blk_rq_pos(current_req) / max_sector; fsector_t = (int)blk_rq_pos(current_req) % max_sector; - if (_floppy->track && TRACK >= _floppy->track) { + if (_floppy->track && raw_cmd->cmd[TRACK] >= _floppy->track) { if (blk_rq_cur_sectors(current_req) & 1) { current_count_sectors = 1; return 1; } else return 0; } - HEAD = fsector_t / _floppy->sect; + raw_cmd->cmd[HEAD] = fsector_t / _floppy->sect; if (((_floppy->stretch & (FD_SWAPSIDES | FD_SECTBASEMASK)) || test_bit(FD_NEED_TWADDLE_BIT, &drive_state[current_drive].flags)) && @@ -2578,7 +2578,7 @@ static int make_raw_rw_request(void) max_sector = _floppy->sect; /* 2M disks have phantom sectors on the first track */ - if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)) { + if ((_floppy->rate & FD_2M) && (!raw_cmd->cmd[TRACK]) && (!raw_cmd->cmd[HEAD])) { max_sector = 2 * _floppy->sect / 3; if (fsector_t >= max_sector) { current_count_sectors = @@ -2586,23 +2586,24 @@ static int make_raw_rw_request(void) blk_rq_sectors(current_req)); return 1; } - SIZECODE = 2; + raw_cmd->cmd[SIZECODE] = 2; } else - SIZECODE = FD_SIZECODE(_floppy); + raw_cmd->cmd[SIZECODE] = FD_SIZECODE(_floppy); raw_cmd->rate = _floppy->rate & 0x43; - if ((_floppy->rate & FD_2M) && (TRACK || HEAD) && raw_cmd->rate == 2) + if ((_floppy->rate & FD_2M) && + (raw_cmd->cmd[TRACK] || raw_cmd->cmd[HEAD]) && raw_cmd->rate == 2) raw_cmd->rate = 1; - if (SIZECODE) - SIZECODE2 = 0xff; + if (raw_cmd->cmd[SIZECODE]) + raw_cmd->cmd[SIZECODE2] = 0xff; else - SIZECODE2 = 0x80; - raw_cmd->track = TRACK << STRETCH(_floppy); - DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, HEAD); - GAP = _floppy->gap; - ssize = DIV_ROUND_UP(1 << SIZECODE, 4); - SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE; - SECTOR = ((fsector_t % _floppy->sect) << 2 >> SIZECODE) + + raw_cmd->cmd[SIZECODE2] = 0x80; + raw_cmd->track = raw_cmd->cmd[TRACK] << STRETCH(_floppy); + raw_cmd->cmd[DR_SELECT] = UNIT(current_drive) + PH_HEAD(_floppy, raw_cmd->cmd[HEAD]); + raw_cmd->cmd[GAP] = _floppy->gap; + ssize = DIV_ROUND_UP(1 << raw_cmd->cmd[SIZECODE], 4); + raw_cmd->cmd[SECT_PER_TRACK] = _floppy->sect << 2 >> raw_cmd->cmd[SIZECODE]; + raw_cmd->cmd[SECTOR] = ((fsector_t % _floppy->sect) << 2 >> raw_cmd->cmd[SIZECODE]) + FD_SECTBASE(_floppy); /* tracksize describes the size which can be filled up with sectors @@ -2610,24 +2611,24 @@ static int make_raw_rw_request(void) */ tracksize = _floppy->sect - _floppy->sect % ssize; if (tracksize < _floppy->sect) { - SECT_PER_TRACK++; + raw_cmd->cmd[SECT_PER_TRACK]++; if (tracksize <= fsector_t % _floppy->sect) - SECTOR--; + raw_cmd->cmd[SECTOR]--; /* if we are beyond tracksize, fill up using smaller sectors */ while (tracksize <= fsector_t % _floppy->sect) { while (tracksize + ssize > _floppy->sect) { - SIZECODE--; + raw_cmd->cmd[SIZECODE]--; ssize >>= 1; } - SECTOR++; - SECT_PER_TRACK++; + raw_cmd->cmd[SECTOR]++; + raw_cmd->cmd[SECT_PER_TRACK]++; tracksize += ssize; } - max_sector = HEAD * _floppy->sect + tracksize; - } else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing) { + max_sector = raw_cmd->cmd[HEAD] * _floppy->sect + tracksize; + } else if (!raw_cmd->cmd[TRACK] && !raw_cmd->cmd[HEAD] && !(_floppy->rate & FD_2M) && probing) { max_sector = _floppy->sect; - } else if (!HEAD && CT(COMMAND) == FD_WRITE) { + } else if (!raw_cmd->cmd[HEAD] && CT(raw_cmd->cmd[COMMAND]) == FD_WRITE) { /* for virtual DMA bug workaround */ max_sector = _floppy->sect; } @@ -2639,12 +2640,12 @@ static int make_raw_rw_request(void) (current_drive == buffer_drive) && (fsector_t >= buffer_min) && (fsector_t < buffer_max)) { /* data already in track buffer */ - if (CT(COMMAND) == FD_READ) { + if (CT(raw_cmd->cmd[COMMAND]) == FD_READ) { copy_buffer(1, max_sector, buffer_max); return 1; } } else if (in_sector_offset || blk_rq_sectors(current_req) < ssize) { - if (CT(COMMAND) == FD_WRITE) { + if (CT(raw_cmd->cmd[COMMAND]) == FD_WRITE) { unsigned int sectors; sectors = fsector_t + blk_rq_sectors(current_req); @@ -2655,7 +2656,7 @@ static int make_raw_rw_request(void) } raw_cmd->flags &= ~FD_RAW_WRITE; raw_cmd->flags |= FD_RAW_READ; - COMMAND = FM_MODE(_floppy, FD_READ); + raw_cmd->cmd[COMMAND] = FM_MODE(_floppy, FD_READ); } else if ((unsigned long)bio_data(current_req->bio) < MAX_DMA_ADDRESS) { unsigned long dma_limit; int direct, indirect; @@ -2706,7 +2707,7 @@ static int make_raw_rw_request(void) } } - if (CT(COMMAND) == FD_READ) + if (CT(raw_cmd->cmd[COMMAND]) == FD_READ) max_size = max_sector; /* unbounded */ /* claim buffer track if needed */ @@ -2714,7 +2715,7 @@ static int make_raw_rw_request(void) buffer_drive != current_drive || /* bad drive */ fsector_t > buffer_max || fsector_t < buffer_min || - ((CT(COMMAND) == FD_READ || + ((CT(raw_cmd->cmd[COMMAND]) == FD_READ || (!in_sector_offset && blk_rq_sectors(current_req) >= ssize)) && max_sector > 2 * max_buffer_sectors + buffer_min && max_size + fsector_t > 2 * max_buffer_sectors + buffer_min)) { @@ -2726,7 +2727,7 @@ static int make_raw_rw_request(void) raw_cmd->kernel_data = floppy_track_buffer + ((aligned_sector_t - buffer_min) << 9); - if (CT(COMMAND) == FD_WRITE) { + if (CT(raw_cmd->cmd[COMMAND]) == FD_WRITE) { /* copy write buffer to track buffer. * if we get here, we know that the write * is either aligned or the data already in the buffer @@ -2748,10 +2749,10 @@ static int make_raw_rw_request(void) raw_cmd->length <<= 9; if ((raw_cmd->length < current_count_sectors << 9) || (raw_cmd->kernel_data != bio_data(current_req->bio) && - CT(COMMAND) == FD_WRITE && + CT(raw_cmd->cmd[COMMAND]) == FD_WRITE && (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max || aligned_sector_t < buffer_min)) || - raw_cmd->length % (128 << SIZECODE) || + raw_cmd->length % (128 << raw_cmd->cmd[SIZECODE]) || raw_cmd->length <= 0 || current_count_sectors <= 0) { DPRINT("fractionary current count b=%lx s=%lx\n", raw_cmd->length, current_count_sectors); @@ -2762,9 +2763,10 @@ static int make_raw_rw_request(void) current_count_sectors); pr_info("st=%d ast=%d mse=%d msi=%d\n", fsector_t, aligned_sector_t, max_sector, max_size); - pr_info("ssize=%x SIZECODE=%d\n", ssize, SIZECODE); + pr_info("ssize=%x SIZECODE=%d\n", ssize, raw_cmd->cmd[SIZECODE]); pr_info("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n", - COMMAND, SECTOR, HEAD, TRACK); + raw_cmd->cmd[COMMAND], raw_cmd->cmd[SECTOR], + raw_cmd->cmd[HEAD], raw_cmd->cmd[TRACK]); pr_info("buffer drive=%d\n", buffer_drive); pr_info("buffer track=%d\n", buffer_track); pr_info("buffer_min=%d\n", buffer_min); @@ -2783,9 +2785,9 @@ static int make_raw_rw_request(void) fsector_t, buffer_min, raw_cmd->length >> 9); pr_info("current_count_sectors=%ld\n", current_count_sectors); - if (CT(COMMAND) == FD_READ) + if (CT(raw_cmd->cmd[COMMAND]) == FD_READ) pr_info("read\n"); - if (CT(COMMAND) == FD_WRITE) + if (CT(raw_cmd->cmd[COMMAND]) == FD_WRITE) pr_info("write\n"); return 0; } @@ -3253,7 +3255,7 @@ static int set_geometry(unsigned int cmd, struct floppy_struct *g, (int)g->head <= 0 || /* check for overflow in max_sector */ (int)(g->sect * g->head) <= 0 || - /* check for zero in F_SECT_PER_TRACK */ + /* check for zero in raw_cmd->cmd[F_SECT_PER_TRACK] */ (unsigned char)((g->sect << 2) >> FD_SIZECODE(g)) == 0 || g->track <= 0 || g->track > drive_params[drive].tracks >> STRETCH(g) || /* check if reserved bits are set */ |