From 25a9b76597fafbbf688dd4473cb910568deb2b0c Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Tue, 25 Jul 2017 19:26:23 +0200
Subject: [PATCH] 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>
---
arch/parisc/include/asm/pdcpat.h | 16 +++++++++++++++-
arch/parisc/kernel/firmware.c | 25 +++++++++++++++++++++++++
2 files changed, 40 insertions(+), 1 deletion(-)
diff --git a/arch/parisc/include/asm/pdcpat.h b/arch/parisc/include/asm/pdcpat.h
index 32e105fb8adb3..e3c0586260d8a 100644
--- a/arch/parisc/include/asm/pdcpat.h
+++ b/arch/parisc/include/asm/pdcpat.h
@@ -150,7 +150,7 @@
#define PDC_PAT_MEM_SETGM 9L /* Set Good Memory value */
#define PDC_PAT_MEM_ADD_PAGE 10L /* ADDs a page to the cell */
#define PDC_PAT_MEM_ADDRESS 11L /* Get Physical Location From */
- /* Memory Address */
+ /* Memory Address */
#define PDC_PAT_MEM_GET_TXT_SIZE 12L /* Get Formatted Text Size */
#define PDC_PAT_MEM_GET_PD_TXT 13L /* Get PD Formatted Text */
#define PDC_PAT_MEM_GET_CELL_TXT 14L /* Get Cell Formatted Text */
@@ -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__ */
diff --git a/arch/parisc/kernel/firmware.c b/arch/parisc/kernel/firmware.c
index 526ed90ca56f4..f622a311d04a1 100644
--- a/arch/parisc/kernel/firmware.c
+++ b/arch/parisc/kernel/firmware.c
@@ -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 */
--
2.30.2