Differential D8453 Diff 22027 sys/dev/nvme/nvme_ctrlr.c

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sys/dev/nvme/nvme_ctrlr.c

Show First 20 Lines • Show All 74 Lines • ▼ Show 20 Lines	nvme_ctrlr_allocate_bar(struct nvme_controller *ctrlr)
*/		*/
ctrlr->bar4_resource_id = PCIR_BAR(4);		ctrlr->bar4_resource_id = PCIR_BAR(4);
ctrlr->bar4_resource = bus_alloc_resource_any(ctrlr->dev, SYS_RES_MEMORY,		ctrlr->bar4_resource = bus_alloc_resource_any(ctrlr->dev, SYS_RES_MEMORY,
&ctrlr->bar4_resource_id, RF_ACTIVE);		&ctrlr->bar4_resource_id, RF_ACTIVE);

return (0);		return (0);
}		}

static void		static int
nvme_ctrlr_construct_admin_qpair(struct nvme_controller *ctrlr)		nvme_ctrlr_construct_admin_qpair(struct nvme_controller *ctrlr)
{		{
struct nvme_qpair *qpair;		struct nvme_qpair *qpair;
uint32_t num_entries;		uint32_t num_entries;
		int error;

qpair = &ctrlr->adminq;		qpair = &ctrlr->adminq;

num_entries = NVME_ADMIN_ENTRIES;		num_entries = NVME_ADMIN_ENTRIES;
TUNABLE_INT_FETCH("hw.nvme.admin_entries", &num_entries);		TUNABLE_INT_FETCH("hw.nvme.admin_entries", &num_entries);
/*		/*
* If admin_entries was overridden to an invalid value, revert it		* If admin_entries was overridden to an invalid value, revert it
* back to our default value.		* back to our default value.
*/		*/
if (num_entries < NVME_MIN_ADMIN_ENTRIES \|\|		if (num_entries < NVME_MIN_ADMIN_ENTRIES \|\|
num_entries > NVME_MAX_ADMIN_ENTRIES) {		num_entries > NVME_MAX_ADMIN_ENTRIES) {
nvme_printf(ctrlr, "invalid hw.nvme.admin_entries=%d "		nvme_printf(ctrlr, "invalid hw.nvme.admin_entries=%d "
"specified\n", num_entries);		"specified\n", num_entries);
num_entries = NVME_ADMIN_ENTRIES;		num_entries = NVME_ADMIN_ENTRIES;
}		}

/*		/*
* The admin queue's max xfer size is treated differently than the		* The admin queue's max xfer size is treated differently than the
* max I/O xfer size. 16KB is sufficient here - maybe even less?		* max I/O xfer size. 16KB is sufficient here - maybe even less?
*/		*/
nvme_qpair_construct(qpair,		error = nvme_qpair_construct(qpair,
0, /* qpair ID */		0, /* qpair ID */
0, /* vector */		0, /* vector */
num_entries,		num_entries,
NVME_ADMIN_TRACKERS,		NVME_ADMIN_TRACKERS,
ctrlr);		ctrlr);
		return (error);
}		}

static int		static int
nvme_ctrlr_construct_io_qpairs(struct nvme_controller *ctrlr)		nvme_ctrlr_construct_io_qpairs(struct nvme_controller *ctrlr)
{		{
struct nvme_qpair *qpair;		struct nvme_qpair *qpair;
union cap_lo_register cap_lo;		union cap_lo_register cap_lo;
int i, num_entries, num_trackers;		int i, error, num_entries, num_trackers;

num_entries = NVME_IO_ENTRIES;		num_entries = NVME_IO_ENTRIES;
TUNABLE_INT_FETCH("hw.nvme.io_entries", &num_entries);		TUNABLE_INT_FETCH("hw.nvme.io_entries", &num_entries);

/*		/*
* NVMe spec sets a hard limit of 64K max entries, but		* NVMe spec sets a hard limit of 64K max entries, but
* devices may specify a smaller limit, so we need to check		* devices may specify a smaller limit, so we need to check
* the MQES field in the capabilities register.		* the MQES field in the capabilities register.
Show All 28 Lines	for (i = 0; i < ctrlr->num_io_queues; i++) {

/*		/*
* Admin queue has ID=0. IO queues start at ID=1 -		* Admin queue has ID=0. IO queues start at ID=1 -
* hence the 'i+1' here.		* hence the 'i+1' here.
*		*
* For I/O queues, use the controller-wide max_xfer_size		* For I/O queues, use the controller-wide max_xfer_size
* calculated in nvme_attach().		* calculated in nvme_attach().
*/		*/
nvme_qpair_construct(qpair,		error = nvme_qpair_construct(qpair,
i+1, /* qpair ID */		i+1, /* qpair ID */
ctrlr->msix_enabled ? i+1 : 0, /* vector */		ctrlr->msix_enabled ? i+1 : 0, /* vector */
num_entries,		num_entries,
num_trackers,		num_trackers,
ctrlr);		ctrlr);
		if (error)
		return (error);

/*		/*
* Do not bother binding interrupts if we only have one I/O		* Do not bother binding interrupts if we only have one I/O
* interrupt thread for this controller.		* interrupt thread for this controller.
*/		*/
if (ctrlr->num_io_queues > 1)		if (ctrlr->num_io_queues > 1)
bus_bind_intr(ctrlr->dev, qpair->res,		bus_bind_intr(ctrlr->dev, qpair->res,
i * ctrlr->num_cpus_per_ioq);		i * ctrlr->num_cpus_per_ioq);
▲ Show 20 Lines • Show All 913 Lines • ▼ Show 20 Lines	nvme_ctrlr_construct(struct nvme_controller *ctrlr, device_t dev)
TUNABLE_INT_FETCH("hw.nvme.retry_count", &nvme_retry_count);		TUNABLE_INT_FETCH("hw.nvme.retry_count", &nvme_retry_count);

ctrlr->enable_aborts = 0;		ctrlr->enable_aborts = 0;
TUNABLE_INT_FETCH("hw.nvme.enable_aborts", &ctrlr->enable_aborts);		TUNABLE_INT_FETCH("hw.nvme.enable_aborts", &ctrlr->enable_aborts);

nvme_ctrlr_setup_interrupts(ctrlr);		nvme_ctrlr_setup_interrupts(ctrlr);

ctrlr->max_xfer_size = NVME_MAX_XFER_SIZE;		ctrlr->max_xfer_size = NVME_MAX_XFER_SIZE;
nvme_ctrlr_construct_admin_qpair(ctrlr);		if (nvme_ctrlr_construct_admin_qpair(ctrlr) != 0)
		return (ENXIO);

ctrlr->cdev = make_dev(&nvme_ctrlr_cdevsw, device_get_unit(dev),		ctrlr->cdev = make_dev(&nvme_ctrlr_cdevsw, device_get_unit(dev),
UID_ROOT, GID_WHEEL, 0600, "nvme%d", device_get_unit(dev));		UID_ROOT, GID_WHEEL, 0600, "nvme%d", device_get_unit(dev));

if (ctrlr->cdev == NULL)		if (ctrlr->cdev == NULL)
return (ENXIO);		return (ENXIO);

ctrlr->cdev->si_drv1 = (void *)ctrlr;		ctrlr->cdev->si_drv1 = (void *)ctrlr;
▲ Show 20 Lines • Show All 120 Lines • Show Last 20 Lines