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scsi: hisi_sas: Pass gfp_t flags to libsas event notifiers 

Use the new libsas event notifiers API, which requires callers to
explicitly pass the gfp_t memory allocation flags.

Below are the context analysis for modified functions:

=> hisi_sas_bytes_dmaed():

Since it is invoked from both process and atomic contexts, let its callers
pass the gfp_t flags:

  * hisi_sas_main.c:
  ------------------

    hisi_sas_phyup_work(): workqueue context
      -> hisi_sas_bytes_dmaed(..., GFP_KERNEL)

    hisi_sas_controller_reset_done(): has an msleep()
      -> hisi_sas_rescan_topology()
        -> hisi_sas_phy_down()
          -> hisi_sas_bytes_dmaed(..., GFP_KERNEL)

    hisi_sas_debug_I_T_nexus_reset(): calls wait_for_completion_timeout()
      -> hisi_sas_phy_down()
        -> hisi_sas_bytes_dmaed(..., GFP_KERNEL)

  * hisi_sas_v1_hw.c:
  -------------------

    int_abnormal_v1_hw(): irq handler
      -> hisi_sas_phy_down()
        -> hisi_sas_bytes_dmaed(..., GFP_ATOMIC)

  * hisi_sas_v[23]_hw.c:
  ----------------------

    int_phy_updown_v[23]_hw(): irq handler
      -> phy_down_v[23]_hw()
        -> hisi_sas_phy_down()
          -> hisi_sas_bytes_dmaed(..., GFP_ATOMIC)

=> int_bcast_v1_hw() and phy_bcast_v3_hw():

Both are invoked exclusively from irq handlers. Pass GFP_ATOMIC.

Link: https://lore.kernel.org/r/20210118100955.1761652-12-a.darwish@linutronix.de
Reviewed-by: John Garry <john.garry@huawei.com>
Signed-off-by: Ahmed S. Darwish <a.darwish@linutronix.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Ahmed S. Darwish 2021-01-18 11:09:47 +01:00 committed by Martin K. Petersen
parent 111d06ab77
commit 26c7efc3f9
5 changed files with 29 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/scsi/hisi_sas/hisi_sas.h
View File

@ -637,7 +637,8 @@ extern void hisi_sas_scan_start(struct Scsi_Host *shost);
extern int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type);
extern void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no,
int enable);
extern void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy);
extern void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy,
gfp_t gfp_flags);
extern void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba,
struct sas_task *task,
struct hisi_sas_slot *slot);

26
drivers/scsi/hisi_sas/hisi_sas_main.c
View File

@ -612,7 +612,8 @@ static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
return rc;
}
static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no,
gfp_t gfp_flags)
{
struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
struct asd_sas_phy *sas_phy = &phy->sas_phy;
@ -626,7 +627,7 @@ static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
return;
}
sas_notify_phy_event(sas_phy, PHYE_OOB_DONE);
sas_notify_phy_event_gfp(sas_phy, PHYE_OOB_DONE, gfp_flags);
if (sas_phy->phy) {
struct sas_phy *sphy = sas_phy->phy;
@ -654,7 +655,7 @@ static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
}
sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
sas_notify_port_event(sas_phy, PORTE_BYTES_DMAED);
sas_notify_port_event_gfp(sas_phy, PORTE_BYTES_DMAED, gfp_flags);
}
static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
@ -860,7 +861,7 @@ static void hisi_sas_phyup_work(struct work_struct *work)
if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP)
hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no);
hisi_sas_bytes_dmaed(hisi_hba, phy_no);
hisi_sas_bytes_dmaed(hisi_hba, phy_no, GFP_KERNEL);
}
static void hisi_sas_linkreset_work(struct work_struct *work)
@ -1429,11 +1430,12 @@ static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 state)
_sas_port = sas_port;
if (dev_is_expander(dev->dev_type))
sas_notify_port_event(sas_phy,
PORTE_BROADCAST_RCVD);
sas_notify_port_event_gfp(sas_phy,
PORTE_BROADCAST_RCVD,
GFP_KERNEL);
}
} else {
hisi_sas_phy_down(hisi_hba, phy_no, 0);
hisi_sas_phy_down(hisi_hba, phy_no, 0, GFP_KERNEL);
}
}
}
@ -1787,7 +1789,7 @@ static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
/* report PHY down if timed out */
if (!ret)
hisi_sas_phy_down(hisi_hba, sas_phy->id, 0);
hisi_sas_phy_down(hisi_hba, sas_phy->id, 0, GFP_KERNEL);
} else if (sas_dev->dev_status != HISI_SAS_DEV_INIT) {
/*
* If in init state, we rely on caller to wait for link to be
@ -2187,7 +2189,8 @@ static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
spin_unlock_irqrestore(&phy->lock, flags);
}
void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy,
gfp_t gfp_flags)
{
struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
struct asd_sas_phy *sas_phy = &phy->sas_phy;
@ -2195,7 +2198,7 @@ void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
if (rdy) {
/* Phy down but ready */
hisi_sas_bytes_dmaed(hisi_hba, phy_no);
hisi_sas_bytes_dmaed(hisi_hba, phy_no, gfp_flags);
hisi_sas_port_notify_formed(sas_phy);
} else {
struct hisi_sas_port *port = phy->port;
@ -2206,7 +2209,8 @@ void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
return;
}
/* Phy down and not ready */
sas_notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
sas_notify_phy_event_gfp(sas_phy,
PHYE_LOSS_OF_SIGNAL, gfp_flags);
sas_phy_disconnected(sas_phy);
if (port) {

6
drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
View File

@ -1423,7 +1423,8 @@ static irqreturn_t int_bcast_v1_hw(int irq, void *p)
}
if (!test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags))
sas_notify_port_event(sas_phy, PORTE_BROADCAST_RCVD);
sas_notify_port_event_gfp(sas_phy, PORTE_BROADCAST_RCVD,
GFP_ATOMIC);
end:
hisi_sas_phy_write32(hisi_hba, phy_no, CHL_INT2,
@ -1452,7 +1453,8 @@ static irqreturn_t int_abnormal_v1_hw(int irq, void *p)
u32 phy_state = hisi_sas_read32(hisi_hba, PHY_STATE);
hisi_sas_phy_down(hisi_hba, phy_no,
(phy_state & 1 << phy_no) ? 1 : 0);
(phy_state & 1 << phy_no) ? 1 : 0,
GFP_ATOMIC);
}
if (irq_value & CHL_INT0_ID_TIMEOUT_MSK)

6
drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
View File

@ -2734,7 +2734,8 @@ static int phy_down_v2_hw(int phy_no, struct hisi_hba *hisi_hba)
phy_state = hisi_sas_read32(hisi_hba, PHY_STATE);
dev_info(dev, "phydown: phy%d phy_state=0x%x\n", phy_no, phy_state);
hisi_sas_phy_down(hisi_hba, phy_no, (phy_state & 1 << phy_no) ? 1 : 0);
hisi_sas_phy_down(hisi_hba, phy_no, (phy_state & 1 << phy_no) ? 1 : 0,
GFP_ATOMIC);
sl_ctrl = hisi_sas_phy_read32(hisi_hba, phy_no, SL_CONTROL);
hisi_sas_phy_write32(hisi_hba, phy_no, SL_CONTROL,
@ -2824,7 +2825,8 @@ static void phy_bcast_v2_hw(int phy_no, struct hisi_hba *hisi_hba)
bcast_status = hisi_sas_phy_read32(hisi_hba, phy_no, RX_PRIMS_STATUS);
if ((bcast_status & RX_BCAST_CHG_MSK) &&
!test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags))
sas_notify_port_event(sas_phy, PORTE_BROADCAST_RCVD);
sas_notify_port_event_gfp(sas_phy, PORTE_BROADCAST_RCVD,
GFP_ATOMIC);
hisi_sas_phy_write32(hisi_hba, phy_no, CHL_INT0,
CHL_INT0_SL_RX_BCST_ACK_MSK);
hisi_sas_phy_write32(hisi_hba, phy_no, SL_RX_BCAST_CHK_MSK, 0);

6
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
View File

@ -1575,7 +1575,8 @@ static irqreturn_t phy_down_v3_hw(int phy_no, struct hisi_hba *hisi_hba)
phy_state = hisi_sas_read32(hisi_hba, PHY_STATE);
dev_info(dev, "phydown: phy%d phy_state=0x%x\n", phy_no, phy_state);
hisi_sas_phy_down(hisi_hba, phy_no, (phy_state & 1 << phy_no) ? 1 : 0);
hisi_sas_phy_down(hisi_hba, phy_no, (phy_state & 1 << phy_no) ? 1 : 0,
GFP_ATOMIC);
sl_ctrl = hisi_sas_phy_read32(hisi_hba, phy_no, SL_CONTROL);
hisi_sas_phy_write32(hisi_hba, phy_no, SL_CONTROL,
@ -1601,7 +1602,8 @@ static irqreturn_t phy_bcast_v3_hw(int phy_no, struct hisi_hba *hisi_hba)
bcast_status = hisi_sas_phy_read32(hisi_hba, phy_no, RX_PRIMS_STATUS);
if ((bcast_status & RX_BCAST_CHG_MSK) &&
!test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags))
sas_notify_port_event(sas_phy, PORTE_BROADCAST_RCVD);
sas_notify_port_event_gfp(sas_phy, PORTE_BROADCAST_RCVD,
GFP_ATOMIC);
hisi_sas_phy_write32(hisi_hba, phy_no, CHL_INT0,
CHL_INT0_SL_RX_BCST_ACK_MSK);
hisi_sas_phy_write32(hisi_hba, phy_no, SL_RX_BCAST_CHK_MSK, 0);