Commit b93d7536 authored by Stephen M. Cameron's avatar Stephen M. Cameron Committed by James Bottomley
Browse files

[SCSI] hpsa: hpsa factor out hpsa_find_board_params


Signed-off-by: default avatarStephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@suse.de>
parent 204892e9
......@@ -3348,6 +3348,30 @@ static int __devinit hpsa_find_cfgtables(struct ctlr_info *h)
return 0;
}
/* Interrogate the hardware for some limits:
* max commands, max SG elements without chaining, and with chaining,
* SG chain block size, etc.
*/
static void __devinit hpsa_find_board_params(struct ctlr_info *h)
{
h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
h->nr_cmds = h->max_commands - 4; /* Allow room for some ioctls */
h->maxsgentries = readl(&(h->cfgtable->MaxScatterGatherElements));
/*
* Limit in-command s/g elements to 32 save dma'able memory.
* Howvever spec says if 0, use 31
*/
h->max_cmd_sg_entries = 31;
if (h->maxsgentries > 512) {
h->max_cmd_sg_entries = 32;
h->chainsize = h->maxsgentries - h->max_cmd_sg_entries + 1;
h->maxsgentries--; /* save one for chain pointer */
} else {
h->maxsgentries = 31; /* default to traditional values */
h->chainsize = 0;
}
}
static int __devinit hpsa_pci_init(struct ctlr_info *h)
{
int i, prod_index, err;
......@@ -3389,27 +3413,7 @@ static int __devinit hpsa_pci_init(struct ctlr_info *h)
err = hpsa_find_cfgtables(h);
if (err)
goto err_out_free_res;
h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
h->maxsgentries = readl(&(h->cfgtable->MaxScatterGatherElements));
/*
* Limit in-command s/g elements to 32 save dma'able memory.
* Howvever spec says if 0, use 31
*/
h->max_cmd_sg_entries = 31;
if (h->maxsgentries > 512) {
h->max_cmd_sg_entries = 32;
h->chainsize = h->maxsgentries - h->max_cmd_sg_entries + 1;
h->maxsgentries--; /* save one for chain pointer */
} else {
h->maxsgentries = 31; /* default to traditional values */
h->chainsize = 0;
}
/* Allow room for some ioctls */
h->nr_cmds = h->max_commands - 4;
hpsa_find_board_params(h);
if ((readb(&h->cfgtable->Signature[0]) != 'C') ||
(readb(&h->cfgtable->Signature[1]) != 'I') ||
......
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