x86, UV: Fix and clean up bau code to use uv_gpa_to_pnode()
Create an inline function to extract the pnode from a global physical address and then convert the broadcast assist unit to use the newly created uv_gpa_to_pnode function. The open-coded code was wrong as well - it might explain a few of our unexplained bau hangs. Signed-off-by: Robin Holt <holt@sgi.com> Acked-by: Cliff Whickman <cpw@sgi.com> Cc: linux-mm@kvack.org Cc: Jack Steiner <steiner@sgi.com> LKML-Reference: <20091016112920.GZ8903@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -114,7 +114,7 @@
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/*
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* The largest possible NASID of a C or M brick (+ 2)
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*/
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#define UV_MAX_NASID_VALUE (UV_MAX_NUMALINK_NODES * 2)
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#define UV_MAX_NASID_VALUE (UV_MAX_NUMALINK_BLADES * 2)
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struct uv_scir_s {
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struct timer_list timer;
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@ -230,6 +230,20 @@ static inline unsigned long uv_gpa(void *v)
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return uv_soc_phys_ram_to_gpa(__pa(v));
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}
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/* gnode -> pnode */
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static inline unsigned long uv_gpa_to_gnode(unsigned long gpa)
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{
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return gpa >> uv_hub_info->m_val;
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}
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/* gpa -> pnode */
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static inline int uv_gpa_to_pnode(unsigned long gpa)
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{
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unsigned long n_mask = (1UL << uv_hub_info->n_val) - 1;
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return uv_gpa_to_gnode(gpa) & n_mask;
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}
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/* pnode, offset --> socket virtual */
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static inline void *uv_pnode_offset_to_vaddr(int pnode, unsigned long offset)
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{
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@ -23,8 +23,6 @@
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static struct bau_control **uv_bau_table_bases __read_mostly;
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static int uv_bau_retry_limit __read_mostly;
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/* position of pnode (which is nasid>>1): */
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static int uv_nshift __read_mostly;
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/* base pnode in this partition */
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static int uv_partition_base_pnode __read_mostly;
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@ -723,7 +721,7 @@ uv_activation_descriptor_init(int node, int pnode)
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BUG_ON(!adp);
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pa = uv_gpa(adp); /* need the real nasid*/
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n = pa >> uv_nshift;
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n = uv_gpa_to_pnode(pa);
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m = pa & uv_mmask;
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uv_write_global_mmr64(pnode, UVH_LB_BAU_SB_DESCRIPTOR_BASE,
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@ -778,7 +776,7 @@ uv_payload_queue_init(int node, int pnode, struct bau_control *bau_tablesp)
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* need the pnode of where the memory was really allocated
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*/
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pa = uv_gpa(pqp);
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pn = pa >> uv_nshift;
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pn = uv_gpa_to_pnode(pa);
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uv_write_global_mmr64(pnode,
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UVH_LB_BAU_INTD_PAYLOAD_QUEUE_FIRST,
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((unsigned long)pn << UV_PAYLOADQ_PNODE_SHIFT) |
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@ -843,7 +841,6 @@ static int __init uv_bau_init(void)
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GFP_KERNEL, cpu_to_node(cur_cpu));
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uv_bau_retry_limit = 1;
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uv_nshift = uv_hub_info->m_val;
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uv_mmask = (1UL << uv_hub_info->m_val) - 1;
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nblades = uv_num_possible_blades();
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