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Differential D27225 Diff 80108 head/sys/cam/cam_periph.c

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head/sys/cam/cam_periph.c

Show First 20 Lines • Show All 766 Lines • ▼ Show 20 Linescamperiphfree(struct cam_periph *periph)
free(periph, M_CAMPERIPH); free(periph, M_CAMPERIPH);
xpt_lock_buses(); xpt_lock_buses();
} }
/* /*
* Map user virtual pointers into kernel virtual address space, so we can * Map user virtual pointers into kernel virtual address space, so we can
* access the memory. This is now a generic function that centralizes most * access the memory. This is now a generic function that centralizes most
* of the sanity checks on the data flags, if any. * of the sanity checks on the data flags, if any.
* This also only works for up to MAXPHYS memory. Since we use * This also only works for up to maxphys memory. Since we use
* buffers to map stuff in and out, we're limited to the buffer size. * buffers to map stuff in and out, we're limited to the buffer size.
*/ */
int int
cam_periph_mapmem(union ccb *ccb, struct cam_periph_map_info *mapinfo, cam_periph_mapmem(union ccb *ccb, struct cam_periph_map_info *mapinfo,
u_int maxmap) u_int maxmap)
{ {
int numbufs, i; int numbufs, i;
u_int8_t **data_ptrs[CAM_PERIPH_MAXMAPS]; u_int8_t **data_ptrs[CAM_PERIPH_MAXMAPS];
u_int32_t lengths[CAM_PERIPH_MAXMAPS]; u_int32_t lengths[CAM_PERIPH_MAXMAPS];
u_int32_t dirs[CAM_PERIPH_MAXMAPS]; u_int32_t dirs[CAM_PERIPH_MAXMAPS];
bool misaligned[CAM_PERIPH_MAXMAPS]; bool misaligned[CAM_PERIPH_MAXMAPS];
bzero(mapinfo, sizeof(*mapinfo)); bzero(mapinfo, sizeof(*mapinfo));
if (maxmap == 0) if (maxmap == 0)
maxmap = DFLTPHYS; /* traditional default */ maxmap = DFLTPHYS; /* traditional default */
else if (maxmap > MAXPHYS) else if (maxmap > maxphys)
maxmap = MAXPHYS; /* for safety */ maxmap = maxphys; /* for safety */
switch(ccb->ccb_h.func_code) { switch(ccb->ccb_h.func_code) {
case XPT_DEV_MATCH: case XPT_DEV_MATCH:
if (ccb->cdm.match_buf_len == 0) { if (ccb->cdm.match_buf_len == 0) {
printf("cam_periph_mapmem: invalid match buffer " printf("cam_periph_mapmem: invalid match buffer "
"length 0\n"); "length 0\n");
return(EINVAL); return(EINVAL);
} }
if (ccb->cdm.pattern_buf_len > 0) { if (ccb->cdm.pattern_buf_len > 0) {
data_ptrs[0] = (u_int8_t **)&ccb->cdm.patterns; data_ptrs[0] = (u_int8_t **)&ccb->cdm.patterns;
lengths[0] = ccb->cdm.pattern_buf_len; lengths[0] = ccb->cdm.pattern_buf_len;
dirs[0] = CAM_DIR_OUT; dirs[0] = CAM_DIR_OUT;
data_ptrs[1] = (u_int8_t **)&ccb->cdm.matches; data_ptrs[1] = (u_int8_t **)&ccb->cdm.matches;
lengths[1] = ccb->cdm.match_buf_len; lengths[1] = ccb->cdm.match_buf_len;
dirs[1] = CAM_DIR_IN; dirs[1] = CAM_DIR_IN;
numbufs = 2; numbufs = 2;
} else { } else {
data_ptrs[0] = (u_int8_t **)&ccb->cdm.matches; data_ptrs[0] = (u_int8_t **)&ccb->cdm.matches;
lengths[0] = ccb->cdm.match_buf_len; lengths[0] = ccb->cdm.match_buf_len;
dirs[0] = CAM_DIR_IN; dirs[0] = CAM_DIR_IN;
numbufs = 1; numbufs = 1;
} }
/* /*
* This request will not go to the hardware, no reason * This request will not go to the hardware, no reason
* to be so strict. vmapbuf() is able to map up to MAXPHYS. * to be so strict. vmapbuf() is able to map up to maxphys.
*/ */
maxmap = MAXPHYS; maxmap = maxphys;
break; break;
case XPT_SCSI_IO: case XPT_SCSI_IO:
case XPT_CONT_TARGET_IO: case XPT_CONT_TARGET_IO:
if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_NONE) if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_NONE)
return(0); return(0);
if ((ccb->ccb_h.flags & CAM_DATA_MASK) != CAM_DATA_VADDR) if ((ccb->ccb_h.flags & CAM_DATA_MASK) != CAM_DATA_VADDR)
return (EINVAL); return (EINVAL);
data_ptrs[0] = &ccb->csio.data_ptr; data_ptrs[0] = &ccb->csio.data_ptr;
▲ Show 20 Lines • Show All 49 Lines • ▼ Show 20 Lines case XPT_DEV_ADVINFO:
data_ptrs[0] = (uint8_t **)&ccb->cdai.buf; data_ptrs[0] = (uint8_t **)&ccb->cdai.buf;
lengths[0] = ccb->cdai.bufsiz; lengths[0] = ccb->cdai.bufsiz;
dirs[0] = CAM_DIR_IN; dirs[0] = CAM_DIR_IN;
numbufs = 1; numbufs = 1;
/* /*
* This request will not go to the hardware, no reason * This request will not go to the hardware, no reason
* to be so strict. vmapbuf() is able to map up to MAXPHYS. * to be so strict. vmapbuf() is able to map up to maxphys.
*/ */
maxmap = MAXPHYS; maxmap = maxphys;
break; break;
default: default:
return(EINVAL); return(EINVAL);
break; /* NOTREACHED */ break; /* NOTREACHED */
} }
/* /*
* Check the transfer length and permissions first, so we don't * Check the transfer length and permissions first, so we don't
Show All 11 Lines for (i = 0; i < numbufs; i++) {
* The userland data pointer passed in may not be page * The userland data pointer passed in may not be page
* aligned. vmapbuf() truncates the address to a page * aligned. vmapbuf() truncates the address to a page
* boundary, so if the address isn't page aligned, we'll * boundary, so if the address isn't page aligned, we'll
* need enough space for the given transfer length, plus * need enough space for the given transfer length, plus
* whatever extra space is necessary to make it to the page * whatever extra space is necessary to make it to the page
* boundary. * boundary.
*/ */
misaligned[i] = (lengths[i] + misaligned[i] = (lengths[i] +
(((vm_offset_t)(*data_ptrs[i])) & PAGE_MASK) > MAXPHYS); (((vm_offset_t)(*data_ptrs[i])) & PAGE_MASK) > maxphys);
} }
/* /*
* This keeps the kernel stack of current thread from getting * This keeps the kernel stack of current thread from getting
* swapped. In low-memory situations where the kernel stack might * swapped. In low-memory situations where the kernel stack might
* otherwise get swapped out, this holds it and allows the thread * otherwise get swapped out, this holds it and allows the thread
* to make progress and release the kernel mapped pages sooner. * to make progress and release the kernel mapped pages sooner.
* *
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