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| author |   Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> | 2017-08-28 23:23:35 -0700 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2017-08-31 14:26:33 +1000 |
| commit | b25b33ac18b35775949ab227bb3075bb6cb11bc3 (patch) | |
| tree | d3918ad19f03e3341d4b961e8a2a3f2440a291eb /arch/powerpc/platforms/powernv/vas.h | |
| parent | powerpc/powernv/vas: Define helpers to access MMIO regions (diff) | |
| download | linux-dev-b25b33ac18b35775949ab227bb3075bb6cb11bc3.tar.xz linux-dev-b25b33ac18b35775949ab227bb3075bb6cb11bc3.zip | |
powerpc/powernv/vas: Define helpers to init window context
Define helpers to initialize window context registers of the VAS
hardware. These will be used in follow-on patches when opening/closing
VAS windows.
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to '')
| -rw-r--r-- | arch/powerpc/platforms/powernv/vas.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/powernv/vas.h b/arch/powerpc/platforms/powernv/vas.h index 650805d654ac..60a3c3c1615b 100644 --- a/arch/powerpc/platforms/powernv/vas.h +++ b/arch/powerpc/platforms/powernv/vas.h @@ -12,6 +12,7 @@ #include <linux/atomic.h> #include <linux/idr.h> #include <asm/vas.h> +#include <linux/io.h> /* * Overview of Virtual Accelerator Switchboard (VAS). @@ -381,4 +382,58 @@ struct vas_winctx { extern struct vas_instance *find_vas_instance(int vasid); +/* + * VREG(x): + * Expand a register's short name (eg: LPID) into two parameters: + * - the register's short name in string form ("LPID"), and + * - the name of the macro (eg: VAS_LPID_OFFSET), defining the + * register's offset in the window context + */ +#define VREG_SFX(n, s) __stringify(n), VAS_##n##s +#define VREG(r) VREG_SFX(r, _OFFSET) + +#ifdef vas_debug +static inline void vas_log_write(struct vas_window *win, char *name, + void *regptr, u64 val) +{ + if (val) + pr_err("%swin #%d: %s reg %p, val 0x%016llx\n", + win->tx_win ? "Tx" : "Rx", win->winid, name, + regptr, val); +} + +#else /* vas_debug */ + +#define vas_log_write(win, name, reg, val) + +#endif /* vas_debug */ + +static inline void write_uwc_reg(struct vas_window *win, char *name, + s32 reg, u64 val) +{ + void *regptr; + + regptr = win->uwc_map + reg; + vas_log_write(win, name, regptr, val); + + out_be64(regptr, val); +} + +static inline void write_hvwc_reg(struct vas_window *win, char *name, + s32 reg, u64 val) +{ + void *regptr; + + regptr = win->hvwc_map + reg; + vas_log_write(win, name, regptr, val); + + out_be64(regptr, val); +} + +static inline u64 read_hvwc_reg(struct vas_window *win, + char *name __maybe_unused, s32 reg) +{ + return in_be64(win->hvwc_map+reg); +} + #endif /* _VAS_H */ |