[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>
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index f820cff..62bbe31 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -167,7 +167,8 @@
.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 @@
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 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 @@
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 @@
}
/**
- * 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 @@
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 b965f358..ea391ff 100644
--- a/drivers/scsi/ipr.h
+++ b/drivers/scsi/ipr.h
@@ -996,7 +996,7 @@
__be16 length;
u8 descriptor_id;
- u8 reserved;
+ u8 reserved[2];
u8 path_state;
u8 reserved2[2];
@@ -1054,7 +1054,7 @@
__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 @@
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 @@
void __iomem *dump_addr_reg;
void __iomem *dump_data_reg;
+
+ void __iomem *endian_swap_reg;
};
struct ipr_chip_cfg_t {
