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author | Wayne Boyer <wayneb@linux.vnet.ibm.com> | 2010-06-04 10:26:50 -0700 |
---|---|---|
committer | James Bottomley <James.Bottomley@suse.de> | 2010-07-27 12:01:30 -0500 |
commit | 8701f18504751a5b89be3203e28c5ec04c147167 (patch) | |
tree | 58f15f58a76ce73e1d92c72a21c19b350b8ded30 | |
parent | da2907ffd08a2d708c829ec171f05fe3ceab1315 (diff) | |
download | linux-3.10-8701f18504751a5b89be3203e28c5ec04c147167.tar.gz linux-3.10-8701f18504751a5b89be3203e28c5ec04c147167.tar.bz2 linux-3.10-8701f18504751a5b89be3203e28c5ec04c147167.zip |
[SCSI] ipr: add endian swap enablement for 64 bit adapters
A change in the hardware design of the chip for the new adapters changes the
default endianness of MMIO operations. This patch adds a register definition
which when written to with a predefined value will change the endianness
back to what the driver expects.
This patch also fixes two problems found during testing.
First, the first reserved field in the ipr_hostrcb64_fabirc_desc structure only
reserved one byte. The correct amount to reserve is 2 bytes.
Second, the reserved field of the ipr_hostrcb64_error structure only reserved
2 bytes. The correct amount to reserve is 16 bytes.
Signed-off-by: Wayne Boyer <wayneb@linux.vnet.ibm.com>
Acked-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
-rw-r--r-- | drivers/scsi/ipr.c | 19 | ||||
-rw-r--r-- | drivers/scsi/ipr.h | 9 |
2 files changed, 24 insertions, 4 deletions
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c index f820cffb7f0..62bbe31dd47 100644 --- a/drivers/scsi/ipr.c +++ b/drivers/scsi/ipr.c @@ -167,7 +167,8 @@ static const struct ipr_chip_cfg_t ipr_chip_cfg[] = { .clr_uproc_interrupt_reg32 = 0x0002C, .init_feedback_reg = 0x0005C, .dump_addr_reg = 0x00064, - .dump_data_reg = 0x00068 + .dump_data_reg = 0x00068, + .endian_swap_reg = 0x00084 } }, }; @@ -7208,6 +7209,12 @@ static int ipr_reset_enable_ioa(struct ipr_cmnd *ipr_cmd) ipr_init_ioa_mem(ioa_cfg); ioa_cfg->allow_interrupts = 1; + if (ioa_cfg->sis64) { + /* Set the adapter to the correct endian mode. */ + writel(IPR_ENDIAN_SWAP_KEY, ioa_cfg->regs.endian_swap_reg); + int_reg = readl(ioa_cfg->regs.endian_swap_reg); + } + int_reg = readl(ioa_cfg->regs.sense_interrupt_reg32); if (int_reg & IPR_PCII_IOA_TRANS_TO_OPER) { @@ -7365,6 +7372,7 @@ static void ipr_get_unit_check_buffer(struct ipr_ioa_cfg *ioa_cfg) static int ipr_reset_restore_cfg_space(struct ipr_cmnd *ipr_cmd) { struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg; + volatile u32 int_reg; int rc; ENTER; @@ -7383,6 +7391,12 @@ static int ipr_reset_restore_cfg_space(struct ipr_cmnd *ipr_cmd) ipr_fail_all_ops(ioa_cfg); + if (ioa_cfg->sis64) { + /* Set the adapter to the correct endian mode. */ + writel(IPR_ENDIAN_SWAP_KEY, ioa_cfg->regs.endian_swap_reg); + int_reg = readl(ioa_cfg->regs.endian_swap_reg); + } + if (ioa_cfg->ioa_unit_checked) { ioa_cfg->ioa_unit_checked = 0; ipr_get_unit_check_buffer(ioa_cfg); @@ -7547,7 +7561,7 @@ static int ipr_reset_wait_to_start_bist(struct ipr_cmnd *ipr_cmd) } /** - * ipr_reset_alert_part2 - Alert the adapter of a pending reset + * ipr_reset_alert - Alert the adapter of a pending reset * @ipr_cmd: ipr command struct * * Description: This function alerts the adapter that it will be reset. @@ -8318,6 +8332,7 @@ static void __devinit ipr_init_ioa_cfg(struct ipr_ioa_cfg *ioa_cfg, t->init_feedback_reg = base + p->init_feedback_reg; t->dump_addr_reg = base + p->dump_addr_reg; t->dump_data_reg = base + p->dump_data_reg; + t->endian_swap_reg = base + p->endian_swap_reg; } } diff --git a/drivers/scsi/ipr.h b/drivers/scsi/ipr.h index b965f3587c9..ea391ffc871 100644 --- a/drivers/scsi/ipr.h +++ b/drivers/scsi/ipr.h @@ -996,7 +996,7 @@ struct ipr_hostrcb64_fabric_desc { __be16 length; u8 descriptor_id; - u8 reserved; + u8 reserved[2]; u8 path_state; u8 reserved2[2]; @@ -1054,7 +1054,7 @@ struct ipr_hostrcb64_error { __be64 fd_lun; u8 fd_res_path[8]; __be64 time_stamp; - u8 reserved[2]; + u8 reserved[16]; union { struct ipr_hostrcb_type_ff_error type_ff_error; struct ipr_hostrcb_type_12_error type_12_error; @@ -1254,6 +1254,9 @@ struct ipr_interrupt_offsets { unsigned long dump_addr_reg; unsigned long dump_data_reg; + +#define IPR_ENDIAN_SWAP_KEY 0x000C0C00 + unsigned long endian_swap_reg; }; struct ipr_interrupts { @@ -1279,6 +1282,8 @@ struct ipr_interrupts { void __iomem *dump_addr_reg; void __iomem *dump_data_reg; + + void __iomem *endian_swap_reg; }; struct ipr_chip_cfg_t { |