From ff3d4578840fd96a50558edf02ca0178b9ebb652 Mon Sep 17 00:00:00 2001 From: Finn Thain Date: Sun, 3 Jan 2016 16:05:25 +1100 Subject: [PATCH] ncr5380: Implement NCR5380_dma_xfer_len and remove LIMIT_TRANSFERSIZE macro Follow the example of the atari_NCR5380.c core driver and adopt the NCR5380_dma_xfer_len() hook. Implement NCR5380_dma_xfer_len() for dtc.c and g_NCR5380.c to take care of the limitations of these cards. Keep the default for drivers using PSEUDO_DMA. Eliminate the unused macro LIMIT_TRANSFERSIZE. Signed-off-by: Finn Thain Reviewed-by: Hannes Reinecke Tested-by: Ondrej Zary Tested-by: Michael Schmitz Signed-off-by: Martin K. Petersen --- drivers/scsi/NCR5380.c | 34 ++++++---------------------------- drivers/scsi/arm/cumana_1.c | 3 +++ drivers/scsi/arm/oak.c | 2 ++ drivers/scsi/atari_NCR5380.c | 8 +++++--- drivers/scsi/dtc.c | 14 ++++++++++++++ drivers/scsi/dtc.h | 3 +++ drivers/scsi/g_NCR5380.c | 15 +++++++++++++++ drivers/scsi/g_NCR5380.h | 3 +++ drivers/scsi/mac_scsi.c | 1 + drivers/scsi/pas16.h | 2 ++ drivers/scsi/t128.h | 2 ++ 11 files changed, 56 insertions(+), 31 deletions(-) diff --git a/drivers/scsi/NCR5380.c b/drivers/scsi/NCR5380.c index 6a030139b41f..91eac63b5239 100644 --- a/drivers/scsi/NCR5380.c +++ b/drivers/scsi/NCR5380.c @@ -201,11 +201,6 @@ * DONT_USE_INTR - if defined, never use interrupts, even if we probe or * override-configure an IRQ. * - * LIMIT_TRANSFERSIZE - if defined, limit the pseudo-dma transfers to 512 - * bytes at a time. Since interrupts are disabled by default during - * these transfers, we might need this to give reasonable interrupt - * service time if the transfer size gets too large. - * * LINKED - if defined, linked commands are supported. * * PSEUDO_DMA - if defined, PSEUDO DMA is used during the data transfer phases. @@ -2000,29 +1995,12 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) { */ #if defined(PSEUDO_DMA) || defined(REAL_DMA_POLL) - /* KLL - * PSEUDO_DMA is defined here. If this is the g_NCR5380 - * driver then it will always be defined, so the - * FLAG_NO_PSEUDO_DMA is used to inhibit PDMA in the base - * NCR5380 case. I think this is a fairly clean solution. - * We supplement these 2 if's with the flag. - */ -#ifdef NCR5380_dma_xfer_len - if (!cmd->device->borken && !(hostdata->flags & FLAG_NO_PSEUDO_DMA) && (transfersize = NCR5380_dma_xfer_len(instance, cmd)) != 0) { -#else - transfersize = cmd->transfersize; - -#ifdef LIMIT_TRANSFERSIZE /* If we have problems with interrupt service */ - if (transfersize > 512) - transfersize = 512; -#endif /* LIMIT_TRANSFERSIZE */ - - if (!cmd->device->borken && transfersize && !(hostdata->flags & FLAG_NO_PSEUDO_DMA) && cmd->SCp.this_residual && !(cmd->SCp.this_residual % transfersize)) { - /* Limit transfers to 32K, for xx400 & xx406 - * pseudoDMA that transfers in 128 bytes blocks. */ - if (transfersize > 32 * 1024) - transfersize = 32 * 1024; -#endif + transfersize = 0; + if (!cmd->device->borken && + !(hostdata->flags & FLAG_NO_PSEUDO_DMA)) + transfersize = NCR5380_dma_xfer_len(instance, cmd, phase); + + if (transfersize) { len = transfersize; if (NCR5380_transfer_dma(instance, &phase, &len, (unsigned char **) &cmd->SCp.ptr)) { /* diff --git a/drivers/scsi/arm/cumana_1.c b/drivers/scsi/arm/cumana_1.c index 0d0cb62b8cdb..f9fb8dabdbbd 100644 --- a/drivers/scsi/arm/cumana_1.c +++ b/drivers/scsi/arm/cumana_1.c @@ -22,6 +22,9 @@ #define priv(host) ((struct NCR5380_hostdata *)(host)->hostdata) #define NCR5380_read(reg) cumanascsi_read(instance, reg) #define NCR5380_write(reg, value) cumanascsi_write(instance, reg, value) + +#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize) + #define NCR5380_intr cumanascsi_intr #define NCR5380_queue_command cumanascsi_queue_command #define NCR5380_info cumanascsi_info diff --git a/drivers/scsi/arm/oak.c b/drivers/scsi/arm/oak.c index db337b998299..d95a1d4f4e02 100644 --- a/drivers/scsi/arm/oak.c +++ b/drivers/scsi/arm/oak.c @@ -26,6 +26,8 @@ #define NCR5380_write(reg, value) \ writeb(value, priv(instance)->base + ((reg) << 2)) +#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize) + #define NCR5380_queue_command oakscsi_queue_command #define NCR5380_info oakscsi_info #define NCR5380_show_info oakscsi_show_info diff --git a/drivers/scsi/atari_NCR5380.c b/drivers/scsi/atari_NCR5380.c index 64ee92090de3..59b378057198 100644 --- a/drivers/scsi/atari_NCR5380.c +++ b/drivers/scsi/atari_NCR5380.c @@ -2170,11 +2170,13 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) */ #if defined(REAL_DMA) - if ( #if !defined(CONFIG_SUN3) - !cmd->device->borken && + transfersize = 0; + if (!cmd->device->borken) #endif - (transfersize = NCR5380_dma_xfer_len(instance, cmd, phase)) >= DMA_MIN_SIZE) { + transfersize = NCR5380_dma_xfer_len(instance, cmd, phase); + + if (transfersize >= DMA_MIN_SIZE) { len = transfersize; cmd->SCp.phase = phase; if (NCR5380_transfer_dma(instance, &phase, diff --git a/drivers/scsi/dtc.c b/drivers/scsi/dtc.c index bc856c8ba0dd..010d9b13aae7 100644 --- a/drivers/scsi/dtc.c +++ b/drivers/scsi/dtc.c @@ -419,6 +419,20 @@ static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, return (0); } +static int dtc_dma_xfer_len(struct scsi_cmnd *cmd) +{ + int transfersize = cmd->transfersize; + + /* Limit transfers to 32K, for xx400 & xx406 + * pseudoDMA that transfers in 128 bytes blocks. + */ + if (transfersize > 32 * 1024 && cmd->SCp.this_residual && + !(cmd->SCp.this_residual % transfersize)) + transfersize = 32 * 1024; + + return transfersize; +} + MODULE_LICENSE("GPL"); #include "NCR5380.c" diff --git a/drivers/scsi/dtc.h b/drivers/scsi/dtc.h index 07b0ac98817c..e6c09a9174ce 100644 --- a/drivers/scsi/dtc.h +++ b/drivers/scsi/dtc.h @@ -27,6 +27,9 @@ #define NCR5380_read(reg) (readb(DTC_address(reg))) #define NCR5380_write(reg, value) (writeb(value, DTC_address(reg))) +#define NCR5380_dma_xfer_len(instance, cmd, phase) \ + dtc_dma_xfer_len(cmd) + #define NCR5380_intr dtc_intr #define NCR5380_queue_command dtc_queue_command #define NCR5380_abort dtc_abort diff --git a/drivers/scsi/g_NCR5380.c b/drivers/scsi/g_NCR5380.c index afd092ff0c2e..5b3e03ad50ce 100644 --- a/drivers/scsi/g_NCR5380.c +++ b/drivers/scsi/g_NCR5380.c @@ -699,6 +699,21 @@ static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, ; // TIMEOUT return 0; } + +static int generic_NCR5380_dma_xfer_len(struct scsi_cmnd *cmd) +{ + int transfersize = cmd->transfersize; + + /* Limit transfers to 32K, for xx400 & xx406 + * pseudoDMA that transfers in 128 bytes blocks. + */ + if (transfersize > 32 * 1024 && cmd->SCp.this_residual && + !(cmd->SCp.this_residual % transfersize)) + transfersize = 32 * 1024; + + return transfersize; +} + #endif /* PSEUDO_DMA */ /* diff --git a/drivers/scsi/g_NCR5380.h b/drivers/scsi/g_NCR5380.h index 5c656f163beb..0056790a9cbe 100644 --- a/drivers/scsi/g_NCR5380.h +++ b/drivers/scsi/g_NCR5380.h @@ -73,6 +73,9 @@ #endif +#define NCR5380_dma_xfer_len(instance, cmd, phase) \ + generic_NCR5380_dma_xfer_len(cmd) + #define NCR5380_intr generic_NCR5380_intr #define NCR5380_queue_command generic_NCR5380_queue_command #define NCR5380_abort generic_NCR5380_abort diff --git a/drivers/scsi/mac_scsi.c b/drivers/scsi/mac_scsi.c index 1317f54bab92..f8ed2acd1456 100644 --- a/drivers/scsi/mac_scsi.c +++ b/drivers/scsi/mac_scsi.c @@ -38,6 +38,7 @@ #define NCR5380_pread macscsi_pread #define NCR5380_pwrite macscsi_pwrite +#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize) #define NCR5380_intr macscsi_intr #define NCR5380_queue_command macscsi_queue_command diff --git a/drivers/scsi/pas16.h b/drivers/scsi/pas16.h index 7247b67fb111..a827a7c1c133 100644 --- a/drivers/scsi/pas16.h +++ b/drivers/scsi/pas16.h @@ -110,6 +110,8 @@ #define NCR5380_read(reg) ( inb(PAS16_io_port(reg)) ) #define NCR5380_write(reg, value) ( outb((value),PAS16_io_port(reg)) ) +#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize) + #define NCR5380_intr pas16_intr #define NCR5380_queue_command pas16_queue_command #define NCR5380_abort pas16_abort diff --git a/drivers/scsi/t128.h b/drivers/scsi/t128.h index ca93c97cf4ba..16691d5fb81b 100644 --- a/drivers/scsi/t128.h +++ b/drivers/scsi/t128.h @@ -84,6 +84,8 @@ #define NCR5380_read(reg) readb(T128_address(reg)) #define NCR5380_write(reg, value) writeb((value),(T128_address(reg))) +#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize) + #define NCR5380_intr t128_intr #define NCR5380_queue_command t128_queue_command #define NCR5380_abort t128_abort -- GitLab