diff options
Diffstat (limited to 'arch/powerpc/sysdev/xive/spapr.c')
| -rw-r--r-- | arch/powerpc/sysdev/xive/spapr.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/xive/spapr.c b/arch/powerpc/sysdev/xive/spapr.c index 52198131c75e..33c10749edec 100644 --- a/arch/powerpc/sysdev/xive/spapr.c +++ b/arch/powerpc/sysdev/xive/spapr.c @@ -215,6 +215,38 @@ static long plpar_int_set_source_config(unsigned long flags, return 0; } +static long plpar_int_get_source_config(unsigned long flags, + unsigned long lisn, + unsigned long *target, + unsigned long *prio, + unsigned long *sw_irq) +{ + unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; + long rc; + + pr_devel("H_INT_GET_SOURCE_CONFIG flags=%lx lisn=%lx\n", flags, lisn); + + do { + rc = plpar_hcall(H_INT_GET_SOURCE_CONFIG, retbuf, flags, lisn, + target, prio, sw_irq); + } while (plpar_busy_delay(rc)); + + if (rc) { + pr_err("H_INT_GET_SOURCE_CONFIG lisn=%ld failed %ld\n", + lisn, rc); + return rc; + } + + *target = retbuf[0]; + *prio = retbuf[1]; + *sw_irq = retbuf[2]; + + pr_devel("H_INT_GET_SOURCE_CONFIG target=%lx prio=%lx sw_irq=%lx\n", + retbuf[0], retbuf[1], retbuf[2]); + + return 0; +} + static long plpar_int_get_queue_info(unsigned long flags, unsigned long target, unsigned long priority, @@ -398,6 +430,24 @@ static int xive_spapr_configure_irq(u32 hw_irq, u32 target, u8 prio, u32 sw_irq) return rc == 0 ? 0 : -ENXIO; } +static int xive_spapr_get_irq_config(u32 hw_irq, u32 *target, u8 *prio, + u32 *sw_irq) +{ + long rc; + unsigned long h_target; + unsigned long h_prio; + unsigned long h_sw_irq; + + rc = plpar_int_get_source_config(0, hw_irq, &h_target, &h_prio, + &h_sw_irq); + + *target = h_target; + *prio = h_prio; + *sw_irq = h_sw_irq; + + return rc == 0 ? 0 : -ENXIO; +} + /* This can be called multiple time to change a queue configuration */ static int xive_spapr_configure_queue(u32 target, struct xive_q *q, u8 prio, __be32 *qpage, u32 order) @@ -590,6 +640,7 @@ static void xive_spapr_sync_source(u32 hw_irq) static const struct xive_ops xive_spapr_ops = { .populate_irq_data = xive_spapr_populate_irq_data, .configure_irq = xive_spapr_configure_irq, + .get_irq_config = xive_spapr_get_irq_config, .setup_queue = xive_spapr_setup_queue, .cleanup_queue = xive_spapr_cleanup_queue, .match = xive_spapr_match, |