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x86/platform/uv/BAU: Add generic function pointers

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Many BAU functions have different implementations depending on the UV
version. Rather than switching on the uvhub_version throughout the driver,
we can define a set of operations for each version. This is especially
beneficial for UV4, which will require many new MMR read/write functions.

Currently, the set of abstracted functions are the same for UV1, UV2, and
UV3. The functions were chosen because each one will have a different
implementation for UV4. Other functions will be added as needed to handle
new implementations or to cleanup the existing differences between UV1,
UV2, and UV3, i.e. read_status and wait_completion.

Signed-off-by: Andrew Banman <abanman@sgi.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Mike Travis <travis@sgi.com>
Acked-by: Dimitri Sivanich <sivanich@sgi.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: akpm@linux-foundation.org
Cc: rja@sgi.com
Link: http://lkml.kernel.org/r/1474474161-265604-6-git-send-email-abanman@sgi.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Andrew Banman 2016-09-21 11:09:16 -05:00 committed by Ingo Molnar
parent 60e1c842c7
commit 5e4f96fe2a
2 changed files with 30 additions and 0 deletions
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11
arch/x86/include/asm/uv/uv_bau.h
View File

@ -385,6 +385,17 @@ struct uv2_3_bau_msg_header {
/* bits 127:120 */
};
/* Abstracted BAU functions */
struct bau_operations {
unsigned long (*read_l_sw_ack)(void);
unsigned long (*read_g_sw_ack)(int pnode);
unsigned long (*bau_gpa_to_offset)(unsigned long vaddr);
void (*write_l_sw_ack)(unsigned long mmr);
void (*write_g_sw_ack)(int pnode, unsigned long mmr);
void (*write_payload_first)(int pnode, unsigned long mmr);
void (*write_payload_last)(int pnode, unsigned long mmr);
};
/*
* The activation descriptor:
* The format of the message to send, plus all accompanying control

19
arch/x86/platform/uv/tlb_uv.c
View File

@ -24,6 +24,18 @@
#include <asm/irq_vectors.h>
#include <asm/timer.h>
static struct bau_operations ops;
static struct bau_operations uv123_bau_ops = {
.bau_gpa_to_offset = uv_gpa_to_offset,
.read_l_sw_ack = read_mmr_sw_ack,
.read_g_sw_ack = read_gmmr_sw_ack,
.write_l_sw_ack = write_mmr_sw_ack,
.write_g_sw_ack = write_gmmr_sw_ack,
.write_payload_first = write_mmr_payload_first,
.write_payload_last = write_mmr_payload_last,
};
/* timeouts in nanoseconds (indexed by UVH_AGING_PRESCALE_SEL urgency7 30:28) */
static int timeout_base_ns[] = {
20,
@ -2135,6 +2147,13 @@ static int __init uv_bau_init(void)
if (!is_uv_system())
return 0;
if (is_uv3_hub())
ops = uv123_bau_ops;
else if (is_uv2_hub())
ops = uv123_bau_ops;
else if (is_uv1_hub())
ops = uv123_bau_ops;
for_each_possible_cpu(cur_cpu) {
mask = &per_cpu(uv_flush_tlb_mask, cur_cpu);
zalloc_cpumask_var_node(mask, GFP_KERNEL, cpu_to_node(cur_cpu));