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Subject[PATCH v4 24/32] scsi: hisi_sas: add dev_found and dev_gone
Date
Add functions to deal with lldd_dev_found and lldd_dev_gone.

Signed-off-by: John Garry <john.garry@huawei.com>
---
drivers/scsi/hisi_sas/hisi_sas.h | 13 +++++
drivers/scsi/hisi_sas/hisi_sas_main.c | 88 ++++++++++++++++++++++++++++++++++
drivers/scsi/hisi_sas/hisi_sas_v1_hw.c | 41 ++++++++++++++++
3 files changed, 142 insertions(+)

diff --git a/drivers/scsi/hisi_sas/hisi_sas.h b/drivers/scsi/hisi_sas/hisi_sas.h
index fe4055b..999f319 100644
--- a/drivers/scsi/hisi_sas/hisi_sas.h
+++ b/drivers/scsi/hisi_sas/hisi_sas.h
@@ -39,6 +39,7 @@

#define HISI_SAS_NAME_LEN 32

+struct hisi_hba;

enum {
PORT_TYPE_SAS = (1U << 1),
@@ -49,6 +50,13 @@ enum dev_status {
HISI_SAS_DEV_NORMAL,
HISI_SAS_DEV_EH,
};
+
+enum hisi_sas_dev_type {
+ HISI_SAS_DEV_TYPE_STP = 0,
+ HISI_SAS_DEV_TYPE_SSP,
+ HISI_SAS_DEV_TYPE_SATA,
+};
+
struct hisi_sas_phy {
struct hisi_hba *hisi_hba;
struct hisi_sas_port *port;
@@ -81,6 +89,9 @@ struct hisi_sas_cq {

struct hisi_sas_device {
enum sas_device_type dev_type;
+ struct hisi_hba *hisi_hba;
+ struct domain_device *sas_device;
+ u64 attached_phy;
u64 device_id;
u64 running_req;
u8 dev_status;
@@ -113,6 +124,8 @@ struct hisi_sas_tmf_task {

struct hisi_sas_hw {
int (*hw_init)(struct hisi_hba *hisi_hba);
+ void (*setup_itct)(struct hisi_hba *hisi_hba,
+ struct hisi_sas_device *device);
void (*sl_notify)(struct hisi_hba *hisi_hba, int phy_no);
int (*get_free_slot)(struct hisi_hba *hisi_hba, int *q, int *s);
void (*start_delivery)(struct hisi_hba *hisi_hba);
diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index ddbd2b71..d8af4c6 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -12,6 +12,9 @@
#include "hisi_sas.h"
#define DRV_NAME "hisi_sas"

+#define DEV_IS_EXPANDER(type) \
+ ((type == SAS_EDGE_EXPANDER_DEVICE) || \
+ (type == SAS_FANOUT_EXPANDER_DEVICE))

#define DEV_IS_GONE(dev) \
((!dev) || (dev->dev_type == SAS_PHY_UNUSED))
@@ -325,6 +328,72 @@ static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
}

+static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
+{
+ struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
+ struct hisi_sas_device *sas_dev = NULL;
+ int i;
+
+ spin_lock(&hisi_hba->lock);
+ for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
+ if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
+ hisi_hba->devices[i].device_id = i;
+ sas_dev = &hisi_hba->devices[i];
+ sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
+ sas_dev->dev_type = device->dev_type;
+ sas_dev->hisi_hba = hisi_hba;
+ sas_dev->sas_device = device;
+ break;
+ }
+ }
+ spin_unlock(&hisi_hba->lock);
+
+ return sas_dev;
+}
+
+static int hisi_sas_dev_found(struct domain_device *device)
+{
+ struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
+ struct domain_device *parent_dev = device->parent;
+ struct hisi_sas_device *sas_dev;
+ struct device *dev = &hisi_hba->pdev->dev;
+
+ sas_dev = hisi_sas_alloc_dev(device);
+ if (!sas_dev) {
+ dev_err(dev, "fail alloc dev: max support %d devices\n",
+ HISI_SAS_MAX_DEVICES);
+ return -EINVAL;
+ }
+
+ device->lldd_dev = sas_dev;
+ hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
+
+ if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
+ int phy_no;
+ u8 phy_num = parent_dev->ex_dev.num_phys;
+ struct ex_phy *phy;
+
+ for (phy_no = 0; phy_no < phy_num; phy_no++) {
+ phy = &parent_dev->ex_dev.ex_phy[phy_no];
+ if (SAS_ADDR(phy->attached_sas_addr) ==
+ SAS_ADDR(device->sas_addr)) {
+ sas_dev->attached_phy = phy_no;
+ break;
+ }
+ }
+
+ if (phy_no == phy_num) {
+ dev_info(dev, "dev found: no attached "
+ "dev:%016llx at ex:%016llx\n",
+ SAS_ADDR(device->sas_addr),
+ SAS_ADDR(parent_dev->sas_addr));
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
static void hisi_sas_phyup_work(struct work_struct *work)
{
struct hisi_sas_phy *phy =
@@ -362,6 +431,23 @@ static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
INIT_WORK(&phy->phyup_ws, hisi_sas_phyup_work);
}

+static void hisi_sas_dev_gone(struct domain_device *device)
+{
+ struct hisi_sas_device *sas_dev = device->lldd_dev;
+ struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
+ struct device *dev = &hisi_hba->pdev->dev;
+ u64 dev_id = sas_dev->device_id;
+
+ dev_info(dev, "found dev[%lld:%x] is gone\n",
+ sas_dev->device_id, sas_dev->dev_type);
+
+ hisi_hba->hw->free_device(hisi_hba, sas_dev);
+ device->lldd_dev = NULL;
+ memset(sas_dev, 0, sizeof(*sas_dev));
+ sas_dev->device_id = dev_id;
+ sas_dev->dev_type = SAS_PHY_UNUSED;
+ sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
+}

static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
{
@@ -390,6 +476,8 @@ static struct scsi_host_template hisi_sas_sht = {
};

static struct sas_domain_function_template hisi_sas_transport_ops = {
+ .lldd_dev_found = hisi_sas_dev_found,
+ .lldd_dev_gone = hisi_sas_dev_gone,
.lldd_execute_task = hisi_sas_queue_command,
};

diff --git a/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
index 6711c0a..530e771 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
@@ -498,6 +498,46 @@ static void init_id_frame_v1_hw(struct hisi_hba *hisi_hba)
config_id_frame_v1_hw(hisi_hba, i);
}

+static void setup_itct_v1_hw(struct hisi_hba *hisi_hba,
+ struct hisi_sas_device *sas_dev)
+{
+ struct domain_device *device = sas_dev->sas_device;
+ struct device *dev = &hisi_hba->pdev->dev;
+ u64 qw0, device_id = sas_dev->device_id;
+ struct hisi_sas_itct *itct = &hisi_hba->itct[device_id];
+
+ memset(itct, 0, sizeof(*itct));
+
+ /* qw0 */
+ qw0 = 0;
+ switch (sas_dev->dev_type) {
+ case SAS_END_DEVICE:
+ case SAS_EDGE_EXPANDER_DEVICE:
+ case SAS_FANOUT_EXPANDER_DEVICE:
+ qw0 = HISI_SAS_DEV_TYPE_SSP << ITCT_HDR_DEV_TYPE_OFF;
+ break;
+ default:
+ dev_warn(dev, "setup itct: unsupported dev type (%d)\n",
+ sas_dev->dev_type);
+ }
+
+ qw0 |= ((1 << ITCT_HDR_VALID_OFF) |
+ (1 << ITCT_HDR_AWT_CONTROL_OFF) |
+ (device->max_linkrate << ITCT_HDR_MAX_CONN_RATE_OFF) |
+ (1 << ITCT_HDR_VALID_LINK_NUM_OFF) |
+ (device->port->id << ITCT_HDR_PORT_ID_OFF));
+ itct->qw0 = cpu_to_le64(qw0);
+
+ /* qw1 */
+ memcpy(&itct->sas_addr, device->sas_addr, SAS_ADDR_SIZE);
+ itct->sas_addr = __swab64(itct->sas_addr);
+
+ /* qw2 */
+ itct->qw2 = cpu_to_le64((500 < ITCT_HDR_IT_NEXUS_LOSS_TL_OFF) |
+ (0xff00 < ITCT_HDR_BUS_INACTIVE_TL_OFF) |
+ (0xff00 < ITCT_HDR_MAX_CONN_TL_OFF) |
+ (0xff00 < ITCT_HDR_REJ_OPEN_TL_OFF));
+}

static void free_device_v1_hw(struct hisi_hba *hisi_hba,
struct hisi_sas_device *sas_dev)
@@ -1452,6 +1492,7 @@ static int hisi_sas_v1_init(struct hisi_hba *hisi_hba)

static const struct hisi_sas_hw hisi_sas_v1_hw = {
.hw_init = hisi_sas_v1_init,
+ .setup_itct = setup_itct_v1_hw,
.sl_notify = sl_notify_v1_hw,
.free_device = free_device_v1_hw,
.prep_ssp = prep_ssp_v1_hw,
--
1.9.1


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