x86/platform/uv/BAU: Add wait_completion to bau_operations

Orabug: 25920237

Remove the present wait_completion routine and add a function pointer by
the same name to the bau_operations struct. Rather than switching on the
UV hub version during message processing, set the architecture-specific
uv*_wait_completion during initialization.

The uv123_bau_ops struct must be split into uv1 and uv2_3 versions to
accommodate the corresponding wait_completion routines.

Signed-off-by: Andrew Banman <abanman@hpe.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Mike Travis <mike.travis@hpe.com>
Cc: sivanich@hpe.com
Cc: rja@hpe.com
Cc: akpm@linux-foundation.org
Link: http://lkml.kernel.org/r/1489077734-111753-6-git-send-email-abanman@hpe.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
(cherry picked from commit 2620bbbf1f4f187952fb35861f4473860c432728)
Signed-off-by: Somasundaram Krishnasamy <somasundaram.krishnasamy@oracle.com>
Reviewed-by: Jack Vogel <jack.vogel@oracle.com>

diff --git a/arch/x86/include/asm/uv/uv_bau.h b/arch/x86/include/asm/uv/uv_bau.h
index 0ec7631ad651f2dab448601903c772457bcd5867..7cac79802ad2d7067522cfa4f483fd5210a6af36 100644 (file)
--- a/arch/x86/include/asm/uv/uv_bau.h
+++ b/arch/x86/include/asm/uv/uv_bau.h
@@ -672,6 +672,8 @@ struct bau_operations {
        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);
+       int             (*wait_completion)(struct bau_desc*,
+                               struct bau_control*, long try);
 };
 
 static inline void write_mmr_data_broadcast(int pnode, unsigned long mmr_image)

diff --git a/arch/x86/platform/uv/tlb_uv.c b/arch/x86/platform/uv/tlb_uv.c
index 3b1d88a091873d027f9730f73e61290946d0bbcc..3a7b146f02cc3986e5a2df92ae896eaf4af83322 100644 (file)
--- a/arch/x86/platform/uv/tlb_uv.c
+++ b/arch/x86/platform/uv/tlb_uv.c
@@ -691,14 +691,6 @@ static int uv2_3_wait_completion(struct bau_desc *bau_desc,
        return FLUSH_COMPLETE;
 }
 
-static int wait_completion(struct bau_desc *bau_desc, struct bau_control *bcp, long try)
-{
-       if (bcp->uvhub_version == UV_BAU_V1)
-               return uv1_wait_completion(bau_desc, bcp, try);
-       else
-               return uv2_3_wait_completion(bau_desc, bcp, try);
-}
-
 /*
  * Our retries are blocked by all destination sw ack resources being
  * in use, and a timeout is pending. In that case hardware immediately
@@ -927,7 +919,7 @@ int uv_flush_send_and_wait(struct cpumask *flush_mask, struct bau_control *bcp,
                write_mmr_activation(index);
 
                try++;
-               completion_stat = wait_completion(bau_desc, bcp, try);
+               completion_stat = ops.wait_completion(bau_desc, bcp, try);
 
                handle_cmplt(completion_stat, bau_desc, bcp, hmaster, stat);
 
@@ -2140,7 +2132,18 @@ fail:
        return 1;
 }
 
-static const struct bau_operations uv123_bau_ops __initconst = {
+static const struct bau_operations uv1_bau_ops __initconst = {
+       .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,
+       .wait_completion         = uv1_wait_completion,
+};
+
+static const struct bau_operations uv2_3_bau_ops __initconst = {
        .bau_gpa_to_offset       = uv_gpa_to_offset,
        .read_l_sw_ack           = read_mmr_sw_ack,
        .read_g_sw_ack           = read_gmmr_sw_ack,
@@ -2148,6 +2151,7 @@ static const struct bau_operations uv123_bau_ops __initconst = {
        .write_g_sw_ack          = write_gmmr_sw_ack,
        .write_payload_first     = write_mmr_payload_first,
        .write_payload_last      = write_mmr_payload_last,
+       .wait_completion         = uv2_3_wait_completion,
 };
 
 static const struct bau_operations uv4_bau_ops __initconst = {
@@ -2158,6 +2162,7 @@ static const struct bau_operations uv4_bau_ops __initconst = {
        .write_g_sw_ack          = write_gmmr_proc_sw_ack,
        .write_payload_first     = write_mmr_proc_payload_first,
        .write_payload_last      = write_mmr_proc_payload_last,
+       .wait_completion         = uv2_3_wait_completion,
 };
 
 /*
@@ -2179,11 +2184,11 @@ static int __init uv_bau_init(void)
        if (is_uv4_hub())
                ops = uv4_bau_ops;
        else if (is_uv3_hub())
-               ops = uv123_bau_ops;
+               ops = uv2_3_bau_ops;
        else if (is_uv2_hub())
-               ops = uv123_bau_ops;
+               ops = uv2_3_bau_ops;
        else if (is_uv1_hub())
-               ops = uv123_bau_ops;
+               ops = uv1_bau_ops;
 
        for_each_possible_cpu(cur_cpu) {
                mask = &per_cpu(uv_flush_tlb_mask, cur_cpu);