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Differential D34869 Diff 105067 sys/dev/nvme/nvme_ctrlr.c

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sys/dev/nvme/nvme_ctrlr.c

Show First 20 Lines • Show All 382 Lines • ▼ Show 20 Linesnvme_ctrlr_enable(struct nvme_controller *ctrlr)
cc = 0; cc = 0;
cc |= 1 << NVME_CC_REG_EN_SHIFT; cc |= 1 << NVME_CC_REG_EN_SHIFT;
cc |= 0 << NVME_CC_REG_CSS_SHIFT; cc |= 0 << NVME_CC_REG_CSS_SHIFT;
cc |= 0 << NVME_CC_REG_AMS_SHIFT; cc |= 0 << NVME_CC_REG_AMS_SHIFT;
cc |= 0 << NVME_CC_REG_SHN_SHIFT; cc |= 0 << NVME_CC_REG_SHN_SHIFT;
cc |= 6 << NVME_CC_REG_IOSQES_SHIFT; /* SQ entry size == 64 == 2^6 */ cc |= 6 << NVME_CC_REG_IOSQES_SHIFT; /* SQ entry size == 64 == 2^6 */
cc |= 4 << NVME_CC_REG_IOCQES_SHIFT; /* CQ entry size == 16 == 2^4 */ cc |= 4 << NVME_CC_REG_IOCQES_SHIFT; /* CQ entry size == 16 == 2^4 */
/* This evaluates to 0, which is according to spec. */ /*
cc |= (PAGE_SHIFT - NVME_BASE_SHIFT) << NVME_CC_REG_MPS_SHIFT; * Use the Memory Page Size selected during device initialization. Note
chuckUnsubmitted
Not Done
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A re-wording suggestion:

Use the Memory Page Size selected during device initialization.
Note that value stored in mps is suitable to use here without adjusting
by NVME_MPS_SHIFT.

chuck: A re-wording suggestion: > Use the Memory Page Size selected during device initialization. >…
* that value stored in mps is suitable to use here without adjusting by
* NVME_MPS_SHIFT.
*/
cc |= ctrlr->mps << NVME_CC_REG_MPS_SHIFT;
nvme_ctrlr_barrier(ctrlr, BUS_SPACE_BARRIER_WRITE); nvme_ctrlr_barrier(ctrlr, BUS_SPACE_BARRIER_WRITE);
nvme_mmio_write_4(ctrlr, cc, cc); nvme_mmio_write_4(ctrlr, cc, cc);
return (nvme_ctrlr_wait_for_ready(ctrlr, 1)); return (nvme_ctrlr_wait_for_ready(ctrlr, 1));
} }
static void static void
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