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Support MAXPHYS up to 512KB

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- We need at least two OCBs with indirect pointers allocated in a 4KB page.
- SBP_MAXPHYS can increase to 1MB once we separate management OCB/ORB
  which usually does not need indirect pointers.
- We have to increase SBP_DMA_SIZE for MAXPHYS larger than 1MB.

MFC after: 3 days
This commit is contained in:
Hidetoshi Shimokawa 2007-03-16 01:23:36 +00:00
parent 3076ca6720
commit 319222274a
1 changed files with 3 additions and 2 deletions
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5
sys/dev/firewire/sbp.c
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@ -91,6 +91,7 @@
* because of CAM_SCSI2_MAXLUN in cam_xpt.c
*/
#define SBP_NUM_LUNS 64
#define SBP_MAXPHYS MIN(MAXPHYS, (512*1024) /* 512KB */)
#define SBP_DMA_SIZE PAGE_SIZE
#define SBP_LOGIN_SIZE sizeof(struct sbp_login_res)
#define SBP_QUEUE_LEN ((SBP_DMA_SIZE - SBP_LOGIN_SIZE) / sizeof(struct sbp_ocb))
@ -161,9 +162,9 @@ TUNABLE_INT("hw.firewire.sbp.tags", &sbp_tags);
#define SBP_SEG_MAX rounddown(0xffff, PAGE_SIZE)
#ifdef __sparc64__ /* iommu */
#define SBP_IND_MAX howmany(MAXPHYS, SBP_SEG_MAX)
#define SBP_IND_MAX howmany(SBP_MAXPHYS, SBP_SEG_MAX)
#else
#define SBP_IND_MAX howmany(MAXPHYS, PAGE_SIZE)
#define SBP_IND_MAX howmany(SBP_MAXPHYS, PAGE_SIZE)
#endif
struct sbp_ocb {
STAILQ_ENTRY(sbp_ocb) ocb;