diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2016-07-05 08:03:50 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-07-21 11:56:38 +0300 |
| commit | 91b6fad5cf16c5fcf0ab2a08fcdbd1483d871d43 (patch) | |
| tree | b413fd8e288ae3945aee1b9024ab39a7c0addeea /drivers/macintosh/smu.c | |
| parent | d3cbff1b5a90afe6cb201aa2187c9609e21f92ad (diff) | |
| download | linux-91b6fad5cf16c5fcf0ab2a08fcdbd1483d871d43.tar.xz | |
powerpc/pmac: Remove early allocation of the SMU command buffer
The SMU command buffer needs to be allocated below 2G using memblock.
In the past, this had to be done very early from the arch code as
memblock wasn't available past that point. That is no longer the
case though, smu_init() is called from setup_arch() when memblock
is still functional these days. So move the allocation to the
SMU driver itself.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'drivers/macintosh/smu.c')
| -rw-r--r-- | drivers/macintosh/smu.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/macintosh/smu.c b/drivers/macintosh/smu.c index d531f804455d..d6f72c826c1c 100644 --- a/drivers/macintosh/smu.c +++ b/drivers/macintosh/smu.c @@ -38,6 +38,7 @@ #include <linux/of_irq.h> #include <linux/of_platform.h> #include <linux/slab.h> +#include <linux/memblock.h> #include <asm/byteorder.h> #include <asm/io.h> @@ -99,6 +100,7 @@ static DEFINE_MUTEX(smu_mutex); static struct smu_device *smu; static DEFINE_MUTEX(smu_part_access); static int smu_irq_inited; +static unsigned long smu_cmdbuf_abs; static void smu_i2c_retry(unsigned long data); @@ -479,8 +481,13 @@ int __init smu_init (void) printk(KERN_INFO "SMU: Driver %s %s\n", VERSION, AUTHOR); + /* + * SMU based G5s need some memory below 2Gb. Thankfully this is + * called at a time where memblock is still available. + */ + smu_cmdbuf_abs = memblock_alloc_base(4096, 4096, 0x80000000UL); if (smu_cmdbuf_abs == 0) { - printk(KERN_ERR "SMU: Command buffer not allocated !\n"); + printk(KERN_ERR "SMU: Command buffer allocation failed !\n"); ret = -EINVAL; goto fail_np; } |