5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Finn Thain <fthain@xxxxxxxxxxxxxx> [ Upstream commit ff1269cb3d978655fb4f61f87d08a46af9854567 ] This is necessary for the eventual removal of SCp from struct scsi_cmnd. Link: https://lore.kernel.org/r/20220218195117.25689-9-bvanassche@xxxxxxx Cc: Michael Schmitz <schmitzmic@xxxxxxxxx> Cc: Ondrej Zary <linux@xxxxxxx> Suggested-by: Bart Van Assche <bvanassche@xxxxxxx> Signed-off-by: Finn Thain <fthain@xxxxxxxxxxxxxx> Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx> Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx> Stable-dep-of: 5768718da941 ("scsi: NCR5380: Check for phase match during PDMA fixup") Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/scsi/NCR5380.c | 94 +++++++++++++++++++-------------------- drivers/scsi/NCR5380.h | 11 +++++ drivers/scsi/atari_scsi.c | 4 +- drivers/scsi/g_NCR5380.c | 4 +- drivers/scsi/mac_scsi.c | 7 +-- drivers/scsi/sun3_scsi.c | 2 +- 6 files changed, 66 insertions(+), 56 deletions(-) diff --git a/drivers/scsi/NCR5380.c b/drivers/scsi/NCR5380.c index a85589a2a8afb..98b1a98db90f6 100644 --- a/drivers/scsi/NCR5380.c +++ b/drivers/scsi/NCR5380.c @@ -84,8 +84,7 @@ * On command termination, the done function will be called as * appropriate. * - * SCSI pointers are maintained in the SCp field of SCSI command - * structures, being initialized after the command is connected + * The command data pointer is initialized after the command is connected * in NCR5380_select, and set as appropriate in NCR5380_information_transfer. * Note that in violation of the standard, an implicit SAVE POINTERS operation * is done, since some BROKEN disks fail to issue an explicit SAVE POINTERS. @@ -145,40 +144,38 @@ static void bus_reset_cleanup(struct Scsi_Host *); static inline void initialize_SCp(struct scsi_cmnd *cmd) { - /* - * Initialize the Scsi Pointer field so that all of the commands in the - * various queues are valid. - */ + struct NCR5380_cmd *ncmd = NCR5380_to_ncmd(cmd); if (scsi_bufflen(cmd)) { - cmd->SCp.buffer = scsi_sglist(cmd); - cmd->SCp.ptr = sg_virt(cmd->SCp.buffer); - cmd->SCp.this_residual = cmd->SCp.buffer->length; + ncmd->buffer = scsi_sglist(cmd); + ncmd->ptr = sg_virt(ncmd->buffer); + ncmd->this_residual = ncmd->buffer->length; } else { - cmd->SCp.buffer = NULL; - cmd->SCp.ptr = NULL; - cmd->SCp.this_residual = 0; + ncmd->buffer = NULL; + ncmd->ptr = NULL; + ncmd->this_residual = 0; } - cmd->SCp.Status = 0; - cmd->SCp.Message = 0; + ncmd->status = 0; + ncmd->message = 0; } -static inline void advance_sg_buffer(struct scsi_cmnd *cmd) +static inline void advance_sg_buffer(struct NCR5380_cmd *ncmd) { - struct scatterlist *s = cmd->SCp.buffer; + struct scatterlist *s = ncmd->buffer; - if (!cmd->SCp.this_residual && s && !sg_is_last(s)) { - cmd->SCp.buffer = sg_next(s); - cmd->SCp.ptr = sg_virt(cmd->SCp.buffer); - cmd->SCp.this_residual = cmd->SCp.buffer->length; + if (!ncmd->this_residual && s && !sg_is_last(s)) { + ncmd->buffer = sg_next(s); + ncmd->ptr = sg_virt(ncmd->buffer); + ncmd->this_residual = ncmd->buffer->length; } } static inline void set_resid_from_SCp(struct scsi_cmnd *cmd) { - int resid = cmd->SCp.this_residual; - struct scatterlist *s = cmd->SCp.buffer; + struct NCR5380_cmd *ncmd = NCR5380_to_ncmd(cmd); + int resid = ncmd->this_residual; + struct scatterlist *s = ncmd->buffer; if (s) while (!sg_is_last(s)) { @@ -564,7 +561,7 @@ static int NCR5380_queue_command(struct Scsi_Host *instance, struct scsi_cmnd *cmd) { struct NCR5380_hostdata *hostdata = shost_priv(instance); - struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd); + struct NCR5380_cmd *ncmd = NCR5380_to_ncmd(cmd); unsigned long flags; #if (NDEBUG & NDEBUG_NO_WRITE) @@ -672,7 +669,7 @@ static struct scsi_cmnd *dequeue_next_cmd(struct Scsi_Host *instance) static void requeue_cmd(struct Scsi_Host *instance, struct scsi_cmnd *cmd) { struct NCR5380_hostdata *hostdata = shost_priv(instance); - struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd); + struct NCR5380_cmd *ncmd = NCR5380_to_ncmd(cmd); if (hostdata->sensing == cmd) { scsi_eh_restore_cmnd(cmd, &hostdata->ses); @@ -757,6 +754,7 @@ static void NCR5380_main(struct work_struct *work) static void NCR5380_dma_complete(struct Scsi_Host *instance) { struct NCR5380_hostdata *hostdata = shost_priv(instance); + struct NCR5380_cmd *ncmd = NCR5380_to_ncmd(hostdata->connected); int transferred; unsigned char **data; int *count; @@ -764,7 +762,7 @@ static void NCR5380_dma_complete(struct Scsi_Host *instance) unsigned char p; if (hostdata->read_overruns) { - p = hostdata->connected->SCp.phase; + p = ncmd->phase; if (p & SR_IO) { udelay(10); if ((NCR5380_read(BUS_AND_STATUS_REG) & @@ -801,8 +799,8 @@ static void NCR5380_dma_complete(struct Scsi_Host *instance) transferred = hostdata->dma_len - NCR5380_dma_residual(hostdata); hostdata->dma_len = 0; - data = (unsigned char **)&hostdata->connected->SCp.ptr; - count = &hostdata->connected->SCp.this_residual; + data = (unsigned char **)&ncmd->ptr; + count = &ncmd->this_residual; *data += transferred; *count -= transferred; @@ -1498,7 +1496,7 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, return -1; } - hostdata->connected->SCp.phase = p; + NCR5380_to_ncmd(hostdata->connected)->phase = p; if (p & SR_IO) { if (hostdata->read_overruns) @@ -1690,7 +1688,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) #endif while ((cmd = hostdata->connected)) { - struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd); + struct NCR5380_cmd *ncmd = NCR5380_to_ncmd(cmd); tmp = NCR5380_read(STATUS_REG); /* We only have a valid SCSI phase when REQ is asserted */ @@ -1705,17 +1703,17 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) sun3_dma_setup_done != cmd) { int count; - advance_sg_buffer(cmd); + advance_sg_buffer(ncmd); count = sun3scsi_dma_xfer_len(hostdata, cmd); if (count > 0) { if (cmd->sc_data_direction == DMA_TO_DEVICE) sun3scsi_dma_send_setup(hostdata, - cmd->SCp.ptr, count); + ncmd->ptr, count); else sun3scsi_dma_recv_setup(hostdata, - cmd->SCp.ptr, count); + ncmd->ptr, count); sun3_dma_setup_done = cmd; } #ifdef SUN3_SCSI_VME @@ -1755,11 +1753,11 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) * scatter-gather list, move onto the next one. */ - advance_sg_buffer(cmd); + advance_sg_buffer(ncmd); dsprintk(NDEBUG_INFORMATION, instance, "this residual %d, sg ents %d\n", - cmd->SCp.this_residual, - sg_nents(cmd->SCp.buffer)); + ncmd->this_residual, + sg_nents(ncmd->buffer)); /* * The preferred transfer method is going to be @@ -1778,7 +1776,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) if (transfersize > 0) { len = transfersize; if (NCR5380_transfer_dma(instance, &phase, - &len, (unsigned char **)&cmd->SCp.ptr)) { + &len, (unsigned char **)&ncmd->ptr)) { /* * If the watchdog timer fires, all future * accesses to this device will use the @@ -1794,13 +1792,13 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) /* Transfer a small chunk so that the * irq mode lock is not held too long. */ - transfersize = min(cmd->SCp.this_residual, + transfersize = min(ncmd->this_residual, NCR5380_PIO_CHUNK_SIZE); len = transfersize; NCR5380_transfer_pio(instance, &phase, &len, - (unsigned char **)&cmd->SCp.ptr, + (unsigned char **)&ncmd->ptr, 0); - cmd->SCp.this_residual -= transfersize - len; + ncmd->this_residual -= transfersize - len; } #ifdef CONFIG_SUN3 if (sun3_dma_setup_done == cmd) @@ -1811,7 +1809,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) len = 1; data = &tmp; NCR5380_transfer_pio(instance, &phase, &len, &data, 0); - cmd->SCp.Message = tmp; + ncmd->message = tmp; switch (tmp) { case ABORT: @@ -1828,15 +1826,15 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) hostdata->connected = NULL; hostdata->busy[scmd_id(cmd)] &= ~(1 << cmd->device->lun); - set_status_byte(cmd, cmd->SCp.Status); + set_status_byte(cmd, ncmd->status); set_resid_from_SCp(cmd); if (cmd->cmnd[0] == REQUEST_SENSE) complete_cmd(instance, cmd); else { - if (cmd->SCp.Status == SAM_STAT_CHECK_CONDITION || - cmd->SCp.Status == SAM_STAT_COMMAND_TERMINATED) { + if (ncmd->status == SAM_STAT_CHECK_CONDITION || + ncmd->status == SAM_STAT_COMMAND_TERMINATED) { dsprintk(NDEBUG_QUEUES, instance, "autosense: adding cmd %p to tail of autosense queue\n", cmd); list_add_tail(&ncmd->list, @@ -2000,7 +1998,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) len = 1; data = &tmp; NCR5380_transfer_pio(instance, &phase, &len, &data, 0); - cmd->SCp.Status = tmp; + ncmd->status = tmp; break; default: shost_printk(KERN_ERR, instance, "unknown phase\n"); @@ -2153,17 +2151,17 @@ static void NCR5380_reselect(struct Scsi_Host *instance) if (sun3_dma_setup_done != tmp) { int count; - advance_sg_buffer(tmp); + advance_sg_buffer(ncmd); count = sun3scsi_dma_xfer_len(hostdata, tmp); if (count > 0) { if (tmp->sc_data_direction == DMA_TO_DEVICE) sun3scsi_dma_send_setup(hostdata, - tmp->SCp.ptr, count); + ncmd->ptr, count); else sun3scsi_dma_recv_setup(hostdata, - tmp->SCp.ptr, count); + ncmd->ptr, count); sun3_dma_setup_done = tmp; } } @@ -2206,7 +2204,7 @@ static bool list_del_cmd(struct list_head *haystack, struct scsi_cmnd *needle) { if (list_find_cmd(haystack, needle)) { - struct NCR5380_cmd *ncmd = scsi_cmd_priv(needle); + struct NCR5380_cmd *ncmd = NCR5380_to_ncmd(needle); list_del(&ncmd->list); return true; diff --git a/drivers/scsi/NCR5380.h b/drivers/scsi/NCR5380.h index 8a3b41932288e..27b3612a9a19f 100644 --- a/drivers/scsi/NCR5380.h +++ b/drivers/scsi/NCR5380.h @@ -227,6 +227,12 @@ struct NCR5380_hostdata { }; struct NCR5380_cmd { + char *ptr; + int this_residual; + struct scatterlist *buffer; + int status; + int message; + int phase; struct list_head list; }; @@ -242,6 +248,11 @@ static inline struct scsi_cmnd *NCR5380_to_scmd(struct NCR5380_cmd *ncmd_ptr) return ((struct scsi_cmnd *)ncmd_ptr) - 1; } +static inline struct NCR5380_cmd *NCR5380_to_ncmd(struct scsi_cmnd *cmd) +{ + return scsi_cmd_priv(cmd); +} + #ifndef NDEBUG #define NDEBUG (0) #endif diff --git a/drivers/scsi/atari_scsi.c b/drivers/scsi/atari_scsi.c index 95d7a35860836..cc6f7761b2ed0 100644 --- a/drivers/scsi/atari_scsi.c +++ b/drivers/scsi/atari_scsi.c @@ -538,7 +538,7 @@ static int falcon_classify_cmd(struct scsi_cmnd *cmd) static int atari_scsi_dma_xfer_len(struct NCR5380_hostdata *hostdata, struct scsi_cmnd *cmd) { - int wanted_len = cmd->SCp.this_residual; + int wanted_len = NCR5380_to_ncmd(cmd)->this_residual; int possible_len, limit; if (wanted_len < DMA_MIN_SIZE) @@ -610,7 +610,7 @@ static int atari_scsi_dma_xfer_len(struct NCR5380_hostdata *hostdata, } /* Last step: apply the hard limit on DMA transfers */ - limit = (atari_dma_buffer && !STRAM_ADDR(virt_to_phys(cmd->SCp.ptr))) ? + limit = (atari_dma_buffer && !STRAM_ADDR(virt_to_phys(NCR5380_to_ncmd(cmd)->ptr))) ? STRAM_BUFFER_SIZE : 255*512; if (possible_len > limit) possible_len = limit; diff --git a/drivers/scsi/g_NCR5380.c b/drivers/scsi/g_NCR5380.c index 7ba3c9312731d..aac6a4c011528 100644 --- a/drivers/scsi/g_NCR5380.c +++ b/drivers/scsi/g_NCR5380.c @@ -663,7 +663,7 @@ static inline int generic_NCR5380_psend(struct NCR5380_hostdata *hostdata, static int generic_NCR5380_dma_xfer_len(struct NCR5380_hostdata *hostdata, struct scsi_cmnd *cmd) { - int transfersize = cmd->SCp.this_residual; + int transfersize = NCR5380_to_ncmd(cmd)->this_residual; if (hostdata->flags & FLAG_NO_PSEUDO_DMA) return 0; @@ -675,7 +675,7 @@ static int generic_NCR5380_dma_xfer_len(struct NCR5380_hostdata *hostdata, /* Limit PDMA send to 512 B to avoid random corruption on DTC3181E */ if (hostdata->board == BOARD_DTC3181E && cmd->sc_data_direction == DMA_TO_DEVICE) - transfersize = min(cmd->SCp.this_residual, 512); + transfersize = min(transfersize, 512); return min(transfersize, DMA_MAX_SIZE); } diff --git a/drivers/scsi/mac_scsi.c b/drivers/scsi/mac_scsi.c index 5c808fbc6ce2c..bae529fc1c3db 100644 --- a/drivers/scsi/mac_scsi.c +++ b/drivers/scsi/mac_scsi.c @@ -404,11 +404,12 @@ static inline int macscsi_pwrite(struct NCR5380_hostdata *hostdata, static int macscsi_dma_xfer_len(struct NCR5380_hostdata *hostdata, struct scsi_cmnd *cmd) { - if (hostdata->flags & FLAG_NO_PSEUDO_DMA || - cmd->SCp.this_residual < setup_use_pdma) + int resid = NCR5380_to_ncmd(cmd)->this_residual; + + if (hostdata->flags & FLAG_NO_PSEUDO_DMA || resid < setup_use_pdma) return 0; - return cmd->SCp.this_residual; + return resid; } static int macscsi_dma_residual(struct NCR5380_hostdata *hostdata) diff --git a/drivers/scsi/sun3_scsi.c b/drivers/scsi/sun3_scsi.c index f7f724a3ff1d4..5b28dd7ebdddf 100644 --- a/drivers/scsi/sun3_scsi.c +++ b/drivers/scsi/sun3_scsi.c @@ -334,7 +334,7 @@ static int sun3scsi_dma_residual(struct NCR5380_hostdata *hostdata) static int sun3scsi_dma_xfer_len(struct NCR5380_hostdata *hostdata, struct scsi_cmnd *cmd) { - int wanted_len = cmd->SCp.this_residual; + int wanted_len = NCR5380_to_ncmd(cmd)->this_residual; if (wanted_len < DMA_MIN_SIZE || blk_rq_is_passthrough(scsi_cmd_to_rq(cmd))) return 0; -- 2.43.0
