diff options
Diffstat (limited to 'drivers/scsi/qla4xxx/ql4_nx.c')
| -rw-r--r-- | drivers/scsi/qla4xxx/ql4_nx.c | 63 |
1 files changed, 29 insertions, 34 deletions
diff --git a/drivers/scsi/qla4xxx/ql4_nx.c b/drivers/scsi/qla4xxx/ql4_nx.c index f1767b21076f..da903a545b2c 100644 --- a/drivers/scsi/qla4xxx/ql4_nx.c +++ b/drivers/scsi/qla4xxx/ql4_nx.c @@ -375,6 +375,35 @@ qla4_82xx_pci_set_crbwindow_2M(struct scsi_qla_host *ha, ulong *off) *off = (*off & MASK(16)) + CRB_INDIRECT_2M + ha->nx_pcibase; } +#define CRB_WIN_LOCK_TIMEOUT 100000000 + +/* + * Context: atomic + */ +static int qla4_82xx_crb_win_lock(struct scsi_qla_host *ha) +{ + int done = 0, timeout = 0; + + while (!done) { + /* acquire semaphore3 from PCI HW block */ + done = qla4_82xx_rd_32(ha, QLA82XX_PCIE_REG(PCIE_SEM7_LOCK)); + if (done == 1) + break; + if (timeout >= CRB_WIN_LOCK_TIMEOUT) + return -1; + + timeout++; + udelay(10); + } + qla4_82xx_wr_32(ha, QLA82XX_CRB_WIN_LOCK_ID, ha->func_num); + return 0; +} + +void qla4_82xx_crb_win_unlock(struct scsi_qla_host *ha) +{ + qla4_82xx_rd_32(ha, QLA82XX_PCIE_REG(PCIE_SEM7_UNLOCK)); +} + void qla4_82xx_wr_32(struct scsi_qla_host *ha, ulong off, u32 data) { @@ -475,40 +504,6 @@ int qla4_82xx_md_wr_32(struct scsi_qla_host *ha, uint32_t off, uint32_t data) return rval; } -#define CRB_WIN_LOCK_TIMEOUT 100000000 - -int qla4_82xx_crb_win_lock(struct scsi_qla_host *ha) -{ - int i; - int done = 0, timeout = 0; - - while (!done) { - /* acquire semaphore3 from PCI HW block */ - done = qla4_82xx_rd_32(ha, QLA82XX_PCIE_REG(PCIE_SEM7_LOCK)); - if (done == 1) - break; - if (timeout >= CRB_WIN_LOCK_TIMEOUT) - return -1; - - timeout++; - - /* Yield CPU */ - if (!in_interrupt()) - schedule(); - else { - for (i = 0; i < 20; i++) - cpu_relax(); /*This a nop instr on i386*/ - } - } - qla4_82xx_wr_32(ha, QLA82XX_CRB_WIN_LOCK_ID, ha->func_num); - return 0; -} - -void qla4_82xx_crb_win_unlock(struct scsi_qla_host *ha) -{ - qla4_82xx_rd_32(ha, QLA82XX_PCIE_REG(PCIE_SEM7_UNLOCK)); -} - #define IDC_LOCK_TIMEOUT 100000000 /** |