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parisc: PDT/firmware: Add support to read PDT on older PAT-machines

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Older machines with a PAT firmware (e.g. the rp5470) return their Page
Deallocation Table (PDT) info per cell via the PDC_PAT_MEM_PD_INFO PDC call.
This patch adds the necessary structures and wrappers to call firmware.

Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Helge Deller 2017-08-04 19:12:39 +02:00
parent 24587380f6
commit 8a5aa00e6b
2 changed files with 53 additions and 8 deletions
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14
arch/parisc/include/asm/pdcpat.h
View File

@ -223,6 +223,18 @@ struct pdc_pat_mem_retinfo { /* PDC_PAT_MEM/PDC_PAT_MEM_PD_INFO (return info) */
unsigned long clear_time; /* last PDT clear time (since Jan 1970) */
};
struct pdc_pat_mem_cell_pdt_retinfo { /* PDC_PAT_MEM/PDC_PAT_MEM_CELL_INFO */
u64 reserved:32;
u64 cs:1; /* clear status: cleared since the last call? */
u64 current_pdt_entries:15;
u64 ic:1; /* interleaving had to be changed ? */
u64 max_pdt_entries:15;
unsigned long good_mem;
unsigned long first_dbe_loc; /* first location of double bit error */
unsigned long clear_time; /* last PDT clear time (since Jan 1970) */
};
struct pdc_pat_mem_read_pd_retinfo { /* PDC_PAT_MEM/PDC_PAT_MEM_PD_READ */
unsigned long actual_count_bytes;
unsigned long pdt_entries;
@ -325,6 +337,8 @@ extern int pdc_pat_io_pci_cfg_read(unsigned long pci_addr, int pci_size, u32 *va
extern int pdc_pat_io_pci_cfg_write(unsigned long pci_addr, int pci_size, u32 val);
extern int pdc_pat_mem_pdt_info(struct pdc_pat_mem_retinfo *rinfo);
extern int pdc_pat_mem_pdt_cell_info(struct pdc_pat_mem_cell_pdt_retinfo *rinfo,
unsigned long cell);
extern int pdc_pat_mem_read_cell_pdt(struct pdc_pat_mem_read_pd_retinfo *pret,
unsigned long *pdt_entries_ptr, unsigned long max_entries);
extern int pdc_pat_mem_read_pd_pdt(struct pdc_pat_mem_read_pd_retinfo *pret,

47
arch/parisc/kernel/firmware.c
View File

@ -142,8 +142,8 @@ static void convert_to_wide(unsigned long *addr)
int i;
unsigned int *p = (unsigned int *)addr;
if(unlikely(parisc_narrow_firmware)) {
for(i = 31; i >= 0; --i)
if (unlikely(parisc_narrow_firmware)) {
for (i = (NUM_PDC_RESULT-1); i >= 0; --i)
addr[i] = p[i];
}
#endif
@ -979,16 +979,22 @@ int pdc_mem_pdt_read_entries(struct pdc_mem_read_pdt *pret,
spin_lock_irqsave(&pdc_lock, flags);
retval = mem_pdc_call(PDC_MEM, PDC_MEM_READ_PDT, __pa(pdc_result),
__pa(pdc_result2));
__pa(pdt_entries_ptr));
if (retval == PDC_OK) {
convert_to_wide(pdc_result);
memcpy(pret, pdc_result, sizeof(*pret));
convert_to_wide(pdc_result2);
memcpy(pdt_entries_ptr, pdc_result2,
pret->pdt_entries * sizeof(*pdt_entries_ptr));
}
spin_unlock_irqrestore(&pdc_lock, flags);
#ifdef CONFIG_64BIT
/*
* 64-bit kernels should not call this PDT function in narrow mode.
* The pdt_entries_ptr array above will now contain 32-bit values
*/
if (WARN_ON_ONCE((retval == PDC_OK) && parisc_narrow_firmware))
return PDC_ERROR;
#endif
return retval;
}
@ -1439,6 +1445,29 @@ int pdc_pat_mem_pdt_info(struct pdc_pat_mem_retinfo *rinfo)
return retval;
}
/**
* pdc_pat_mem_pdt_cell_info - Retrieve information about page deallocation
* table of a cell
* @rinfo: memory pdt information
* @cell: cell number
*
*/
int pdc_pat_mem_pdt_cell_info(struct pdc_pat_mem_cell_pdt_retinfo *rinfo,
unsigned long cell)
{
int retval;
unsigned long flags;
spin_lock_irqsave(&pdc_lock, flags);
retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_CELL_INFO,
__pa(&pdc_result), cell);
if (retval == PDC_OK)
memcpy(rinfo, &pdc_result, sizeof(*rinfo));
spin_unlock_irqrestore(&pdc_lock, flags);
return retval;
}
/**
* pdc_pat_mem_read_cell_pdt - Read PDT entries from (old) PAT firmware
* @pret: array of PDT entries
@ -1455,14 +1484,14 @@ int pdc_pat_mem_read_cell_pdt(struct pdc_pat_mem_read_pd_retinfo *pret,
spin_lock_irqsave(&pdc_lock, flags);
/* PDC_PAT_MEM_CELL_READ is available on early PAT machines only */
retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_CELL_READ,
__pa(&pdc_result), parisc_cell_num, __pa(&pdc_result2));
__pa(&pdc_result), parisc_cell_num,
__pa(pdt_entries_ptr));
if (retval == PDC_OK) {
/* build up return value as for PDC_PAT_MEM_PD_READ */
entries = min(pdc_result[0], max_entries);
pret->pdt_entries = entries;
pret->actual_count_bytes = entries * sizeof(unsigned long);
memcpy(pdt_entries_ptr, &pdc_result2, pret->actual_count_bytes);
}
spin_unlock_irqrestore(&pdc_lock, flags);
@ -1474,6 +1503,8 @@ int pdc_pat_mem_read_cell_pdt(struct pdc_pat_mem_read_pd_retinfo *pret,
* pdc_pat_mem_read_pd_pdt - Read PDT entries from (newer) PAT firmware
* @pret: array of PDT entries
* @pdt_entries_ptr: ptr to hold number of PDT entries
* @count: number of bytes to read
* @offset: offset to start (in bytes)
*
*/
int pdc_pat_mem_read_pd_pdt(struct pdc_pat_mem_read_pd_retinfo *pret,