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parisc: Add function to return DIMM slot of physical address 

Add a firmware wrapper function, which asks PDC firmware for the DIMM slot of a
physical address. This is needed to show users which DIMM module needs
replacement in case a broken DIMM was encountered.

Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Helge Deller 2017-07-25 19:26:23 +02:00
parent f520e55241
commit 25a9b76597
2 changed files with 40 additions and 1 deletions
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14
arch/parisc/include/asm/pdcpat.h
View File

@ -228,6 +228,17 @@ struct pdc_pat_mem_read_pd_retinfo { /* PDC_PAT_MEM/PDC_PAT_MEM_PD_READ */
unsigned long pdt_entries;
};
struct pdc_pat_mem_phys_mem_location { /* PDC_PAT_MEM/PDC_PAT_MEM_ADDRESS */
u64 cabinet:8;
u64 ign1:8;
u64 ign2:8;
u64 cell_slot:8;
u64 ign3:8;
u64 dimm_slot:8; /* DIMM slot, e.g. 0x1A, 0x2B, show user hex value! */
u64 ign4:8;
u64 source:4; /* for mem: always 0x07 */
u64 source_detail:4; /* for mem: always 0x04 (SIMM or DIMM) */
};
struct pdc_pat_pd_addr_map_entry {
unsigned char entry_type; /* 1 = Memory Descriptor Entry Type */
@ -319,6 +330,9 @@ extern int pdc_pat_mem_read_cell_pdt(struct pdc_pat_mem_read_pd_retinfo *pret,
extern int pdc_pat_mem_read_pd_pdt(struct pdc_pat_mem_read_pd_retinfo *pret,
unsigned long *pdt_entries_ptr, unsigned long count,
unsigned long offset);
extern int pdc_pat_mem_get_dimm_phys_location(
struct pdc_pat_mem_phys_mem_location *pret,
unsigned long phys_addr);
#endif /* __ASSEMBLY__ */

25
arch/parisc/kernel/firmware.c
View File

@ -1498,6 +1498,31 @@ int pdc_pat_mem_read_pd_pdt(struct pdc_pat_mem_read_pd_retinfo *pret,
return retval;
}
/**
* pdc_pat_mem_get_dimm_phys_location - Get physical DIMM slot via PAT firmware
* @pret: ptr to hold returned information
* @phys_addr: physical address to examine
*
*/
int pdc_pat_mem_get_dimm_phys_location(
struct pdc_pat_mem_phys_mem_location *pret,
unsigned long phys_addr)
{
int retval;
unsigned long flags;
spin_lock_irqsave(&pdc_lock, flags);
retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_ADDRESS,
__pa(&pdc_result), phys_addr);
if (retval == PDC_OK)
memcpy(pret, &pdc_result, sizeof(*pret));
spin_unlock_irqrestore(&pdc_lock, flags);
return retval;
}
#endif /* CONFIG_64BIT */