[v3 PATCH 1/2] scsi:stex.c Support Pegasus 3 product

From: Charles Chiou
Date: Tue Jun 14 2016 - 04:33:36 EST

From: Charles <charles.chiou@xxxxxxxxxxxxxx>

Pegasus series is a RAID support product by using Thunderbolt technology.

The newest product, Pegasus 3 is support Thunderbolt 3 technology with another chip.

1.Change driver version.

2.Add Pegasus 3 VID, DID and define it's device address.

3.Pegasus 3 use msi interrupt, so stex_request_irq P3 type enable msi.

4.For hibernation, use msi_lock in stex_ss_handshake to prevent msi register write again when handshaking.

5.Pegasus 3 don't need read() as flush.

6.In stex_ss_intr & stex_abort, P3 only clear interrupt register when getting vendor defined interrupt.

Signed-off-by: Charles <charles.chiou@xxxxxxxxxxxxxx>
Signed-off-by: Paul <paul.lyu@xxxxxxxxxxxxxx>
---
drivers/scsi/stex.c | 240 ++++++++++++++++++++++++++++++++++++++--------------
1 file changed, 175 insertions(+), 65 deletions(-)

diff --git a/drivers/scsi/stex.c b/drivers/scsi/stex.c
index 5b23175..cad53b5 100644
--- a/drivers/scsi/stex.c
+++ b/drivers/scsi/stex.c
@@ -38,8 +38,8 @@
#include <scsi/scsi_eh.h>

#define DRV_NAME "stex"
-#define ST_DRIVER_VERSION "5.00.0000.01"
-#define ST_VER_MAJOR 5
+#define ST_DRIVER_VERSION "6.00.0000.01"
+#define ST_VER_MAJOR 6
#define ST_VER_MINOR 00
#define ST_OEM 0000
#define ST_BUILD_VER 01
@@ -64,6 +64,13 @@ enum {
YI2H_INT_C = 0xa0,
YH2I_REQ = 0xc0,
YH2I_REQ_HI = 0xc4,
+ PSCRATCH0 = 0xb0,
+ PSCRATCH1 = 0xb4,
+ PSCRATCH2 = 0xb8,
+ PSCRATCH3 = 0xbc,
+ PSCRATCH4 = 0xc8,
+ MAILBOX_BASE = 0x1000,
+ MAILBOX_HNDSHK_STS = 0x0,

/* MU register value */
MU_INBOUND_DOORBELL_HANDSHAKE = (1 << 0),
@@ -87,7 +94,7 @@ enum {
MU_STATE_STOP = 5,
MU_STATE_NOCONNECT = 6,

- MU_MAX_DELAY = 120,
+ MU_MAX_DELAY = 50,
MU_HANDSHAKE_SIGNATURE = 0x55aaaa55,
MU_HANDSHAKE_SIGNATURE_HALF = 0x5a5a0000,
MU_HARD_RESET_WAIT = 30000,
@@ -135,6 +142,7 @@ enum {
st_yosemite = 2,
st_seq = 3,
st_yel = 4,
+ st_P3 = 5,

PASSTHRU_REQ_TYPE = 0x00000001,
PASSTHRU_REQ_NO_WAKEUP = 0x00000100,
@@ -339,6 +347,7 @@ struct st_hba {
u16 rq_size;
u16 sts_count;
u8 supports_pm;
+ int msi_lock;
};

struct st_card_info {
@@ -540,11 +549,15 @@ stex_ss_send_cmd(struct st_hba *hba, struct req_msg *req, u16 tag)

++hba->req_head;
hba->req_head %= hba->rq_count+1;
-
- writel((addr >> 16) >> 16, hba->mmio_base + YH2I_REQ_HI);
- readl(hba->mmio_base + YH2I_REQ_HI); /* flush */
- writel(addr, hba->mmio_base + YH2I_REQ);
- readl(hba->mmio_base + YH2I_REQ); /* flush */
+ if (hba->cardtype == st_P3) {
+ writel((addr >> 16) >> 16, hba->mmio_base + YH2I_REQ_HI);
+ writel(addr, hba->mmio_base + YH2I_REQ);
+ } else {
+ writel((addr >> 16) >> 16, hba->mmio_base + YH2I_REQ_HI);
+ readl(hba->mmio_base + YH2I_REQ_HI); /* flush */
+ writel(addr, hba->mmio_base + YH2I_REQ);
+ readl(hba->mmio_base + YH2I_REQ); /* flush */
+ }
}

static void return_abnormal_state(struct st_hba *hba, int status)
@@ -974,15 +987,31 @@ static irqreturn_t stex_ss_intr(int irq, void *__hba)

spin_lock_irqsave(hba->host->host_lock, flags);

- data = readl(base + YI2H_INT);
- if (data && data != 0xffffffff) {
- /* clear the interrupt */
- writel(data, base + YI2H_INT_C);
- stex_ss_mu_intr(hba);
- spin_unlock_irqrestore(hba->host->host_lock, flags);
- if (unlikely(data & SS_I2H_REQUEST_RESET))
- queue_work(hba->work_q, &hba->reset_work);
- return IRQ_HANDLED;
+ if (hba->cardtype == st_yel) {
+ data = readl(base + YI2H_INT);
+ if (data && data != 0xffffffff) {
+ /* clear the interrupt */
+ writel(data, base + YI2H_INT_C);
+ stex_ss_mu_intr(hba);
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+ if (unlikely(data & SS_I2H_REQUEST_RESET))
+ queue_work(hba->work_q, &hba->reset_work);
+ return IRQ_HANDLED;
+ }
+ } else {
+ data = readl(base + PSCRATCH4);
+ if (data != 0xffffffff) {
+ if (data != 0) {
+ /* clear the interrupt */
+ writel(data, base + PSCRATCH1);
+ writel((1 << 22), base + YH2I_INT);
+ }
+ stex_ss_mu_intr(hba);
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+ if (unlikely(data & SS_I2H_REQUEST_RESET))
+ queue_work(hba->work_q, &hba->reset_work);
+ return IRQ_HANDLED;
+ }
}

spin_unlock_irqrestore(hba->host->host_lock, flags);
@@ -1085,14 +1114,27 @@ static int stex_ss_handshake(struct st_hba *hba)
int ret = 0;

before = jiffies;
- while ((readl(base + YIOA_STATUS) & SS_MU_OPERATIONAL) == 0) {
- if (time_after(jiffies, before + MU_MAX_DELAY * HZ)) {
- printk(KERN_ERR DRV_NAME
- "(%s): firmware not operational\n",
- pci_name(hba->pdev));
- return -1;
+
+ if (hba->cardtype == st_yel) {
+ while ((readl(base + YIOA_STATUS) & SS_MU_OPERATIONAL) == 0) {
+ if (time_after(jiffies, before + MU_MAX_DELAY * HZ)) {
+ printk(KERN_ERR DRV_NAME
+ "(%s): firmware not operational\n",
+ pci_name(hba->pdev));
+ return -1;
+ }
+ msleep(1);
+ }
+ } else {
+ while ((readl(base + PSCRATCH3) & SS_MU_OPERATIONAL) == 0) {
+ if (time_after(jiffies, before + MU_MAX_DELAY * HZ)) {
+ printk(KERN_ERR DRV_NAME
+ "(%s): firmware not operational\n",
+ pci_name(hba->pdev));
+ return -1;
+ }
+ msleep(1);
}
- msleep(1);
}

msg_h = (struct st_msg_header *)hba->dma_mem;
@@ -1111,30 +1153,59 @@ static int stex_ss_handshake(struct st_hba *hba)
scratch_size = (hba->sts_count+1)*sizeof(u32);
h->scratch_size = cpu_to_le32(scratch_size);

- data = readl(base + YINT_EN);
- data &= ~4;
- writel(data, base + YINT_EN);
- writel((hba->dma_handle >> 16) >> 16, base + YH2I_REQ_HI);
- readl(base + YH2I_REQ_HI);
- writel(hba->dma_handle, base + YH2I_REQ);
- readl(base + YH2I_REQ); /* flush */
+ if (hba->cardtype == st_yel) {
+ data = readl(base + YINT_EN);
+ data &= ~4;
+ writel(data, base + YINT_EN);
+ writel((hba->dma_handle >> 16) >> 16, base + YH2I_REQ_HI);
+ readl(base + YH2I_REQ_HI);
+ writel(hba->dma_handle, base + YH2I_REQ);
+ readl(base + YH2I_REQ); /* flush */
+ } else {
+ data = readl(base + YINT_EN);
+ data &= ~(1 << 0);
+ data &= ~(1 << 2);
+ writel(data, base + YINT_EN);
+ if (hba->msi_lock == 0) {
+ /* P3 MSI Register cannot access twice */
+ writel((1 << 6), base + YH2I_INT);
+ hba->msi_lock = 1;
+ }
+ writel((hba->dma_handle >> 16) >> 16, base + YH2I_REQ_HI);
+ writel(hba->dma_handle, base + YH2I_REQ);
+ }

- scratch = hba->scratch;
before = jiffies;
- while (!(le32_to_cpu(*scratch) & SS_STS_HANDSHAKE)) {
- if (time_after(jiffies, before + MU_MAX_DELAY * HZ)) {
- printk(KERN_ERR DRV_NAME
- "(%s): no signature after handshake frame\n",
- pci_name(hba->pdev));
- ret = -1;
- break;
+ scratch = hba->scratch;
+ if (hba->cardtype == st_yel) {
+ while (!(le32_to_cpu(*scratch) & SS_STS_HANDSHAKE)) {
+ if (time_after(jiffies, before + MU_MAX_DELAY * HZ)) {
+ printk(KERN_ERR DRV_NAME
+ "(%s): no signature after handshake frame\n",
+ pci_name(hba->pdev));
+ ret = -1;
+ break;
+ }
+ rmb();
+ msleep(1);
+ }
+ } else {
+ while ((readl(base + MAILBOX_BASE + MAILBOX_HNDSHK_STS)
+ & SS_STS_HANDSHAKE) == 0) {
+ if (time_after(jiffies, before + MU_MAX_DELAY * HZ)) {
+ printk(KERN_ERR DRV_NAME
+ "(%s): no signature after handshake frame\n",
+ pci_name(hba->pdev));
+ ret = -1;
+ break;
+ }
+ rmb();
+ msleep(1);
}
- rmb();
- msleep(1);
}
-
memset(scratch, 0, scratch_size);
msg_h->flag = 0;
+
return ret;
}

@@ -1144,8 +1215,10 @@ static int stex_handshake(struct st_hba *hba)
unsigned long flags;
unsigned int mu_status;

- err = (hba->cardtype == st_yel) ?
- stex_ss_handshake(hba) : stex_common_handshake(hba);
+ if (hba->cardtype == st_yel || hba->cardtype == st_P3)
+ err = stex_ss_handshake(hba);
+ else
+ err = stex_common_handshake(hba);
spin_lock_irqsave(hba->host->host_lock, flags);
mu_status = hba->mu_status;
if (err == 0) {
@@ -1190,6 +1263,15 @@ static int stex_abort(struct scsi_cmnd *cmd)

writel(data, base + YI2H_INT_C);
stex_ss_mu_intr(hba);
+ } else if (hba->cardtype == st_P3) {
+ data = readl(base + PSCRATCH4);
+ if (data == 0xffffffff)
+ goto fail_out;
+ if (data != 0) {
+ writel(data, base + PSCRATCH1);
+ writel((1 << 22), base + YH2I_INT);
+ }
+ stex_ss_mu_intr(hba);
} else {
data = readl(base + ODBL);
if (data == 0 || data == 0xffffffff)
@@ -1197,7 +1279,6 @@ static int stex_abort(struct scsi_cmnd *cmd)

writel(data, base + ODBL);
readl(base + ODBL); /* flush */
-
stex_mu_intr(hba, data);
}
if (hba->wait_ccb == NULL) {
@@ -1293,6 +1374,12 @@ static void stex_ss_reset(struct st_hba *hba)
ssleep(5);
}

+static void stex_p3_reset(struct st_hba *hba)
+{
+ writel(SS_H2I_INT_RESET, hba->mmio_base + YH2I_INT);
+ ssleep(5);
+}
+
static int stex_do_reset(struct st_hba *hba)
{
unsigned long flags;
@@ -1329,7 +1416,8 @@ static int stex_do_reset(struct st_hba *hba)
stex_hard_reset(hba);
else if (hba->cardtype == st_yel)
stex_ss_reset(hba);
-
+ else if (hba->cardtype == st_P3)
+ stex_p3_reset(hba);

return_abnormal_state(hba, DID_RESET);

@@ -1414,6 +1502,13 @@ static struct pci_device_id stex_pci_tbl[] = {
/* st_yel */
{ 0x105a, 0x8650, 0x1033, PCI_ANY_ID, 0, 0, st_yel },
{ 0x105a, 0x8760, PCI_ANY_ID, PCI_ANY_ID, 0, 0, st_yel },
+
+ /* st_P3, pluto */
+ { PCI_VENDOR_ID_PROMISE, 0x8870, PCI_VENDOR_ID_PROMISE,
+ 0x8870, 0, 0, st_P3 },
+ /* st_P3, p3 */
+ { PCI_VENDOR_ID_PROMISE, 0x8870, PCI_VENDOR_ID_PROMISE,
+ 0x4300, 0, 0, st_P3 },
{ } /* terminate list */
};

@@ -1482,6 +1577,19 @@ static struct st_card_info stex_card_info[] = {
.map_sg = stex_ss_map_sg,
.send = stex_ss_send_cmd,
},
+
+ /* st_P3 */
+ {
+ .max_id = 129,
+ .max_lun = 256,
+ .max_channel = 0,
+ .rq_count = 801,
+ .rq_size = 512,
+ .sts_count = 801,
+ .alloc_rq = stex_ss_alloc_req,
+ .map_sg = stex_ss_map_sg,
+ .send = stex_ss_send_cmd,
+ },
};

static int stex_set_dma_mask(struct pci_dev * pdev)
@@ -1502,7 +1610,7 @@ static int stex_request_irq(struct st_hba *hba)
struct pci_dev *pdev = hba->pdev;
int status;

- if (msi) {
+ if (msi || hba->cardtype == st_P3) {
status = pci_enable_msi(pdev);
if (status != 0)
printk(KERN_ERR DRV_NAME
@@ -1513,7 +1621,8 @@ static int stex_request_irq(struct st_hba *hba)
} else
hba->msi_enabled = 0;

- status = request_irq(pdev->irq, hba->cardtype == st_yel ?
+ status = request_irq(pdev->irq,
+ (hba->cardtype == st_yel || hba->cardtype == st_P3) ?
stex_ss_intr : stex_intr, IRQF_SHARED, DRV_NAME, hba);

if (status != 0) {
@@ -1597,12 +1706,12 @@ static int stex_probe(struct pci_dev *pdev, const struct pci_device_id *id)
case 0x4265:
break;
default:
- if (hba->cardtype == st_yel)
+ if (hba->cardtype == st_yel || hba->cardtype == st_P3)
hba->supports_pm = 1;
}

sts_offset = scratch_offset = (ci->rq_count+1) * ci->rq_size;
- if (hba->cardtype == st_yel)
+ if (hba->cardtype == st_yel || hba->cardtype == st_P3)
sts_offset += (ci->sts_count+1) * sizeof(u32);
cp_offset = sts_offset + (ci->sts_count+1) * sizeof(struct status_msg);
hba->dma_size = cp_offset + sizeof(struct st_frame);
@@ -1642,7 +1751,7 @@ static int stex_probe(struct pci_dev *pdev, const struct pci_device_id *id)
goto out_pci_free;
}

- if (hba->cardtype == st_yel)
+ if (hba->cardtype == st_yel || hba->cardtype == st_P3)
hba->scratch = (__le32 *)(hba->dma_mem + scratch_offset);
hba->status_buffer = (struct status_msg *)(hba->dma_mem + sts_offset);
hba->copy_buffer = hba->dma_mem + cp_offset;
@@ -1653,8 +1762,9 @@ static int stex_probe(struct pci_dev *pdev, const struct pci_device_id *id)
hba->map_sg = ci->map_sg;
hba->send = ci->send;
hba->mu_status = MU_STATE_STARTING;
+ hba->msi_lock = 0;

- if (hba->cardtype == st_yel)
+ if (hba->cardtype == st_yel || hba->cardtype == st_P3)
host->sg_tablesize = 38;
else
host->sg_tablesize = 32;
@@ -1736,28 +1846,29 @@ static void stex_hba_stop(struct st_hba *hba, int st_sleep_mic)

spin_lock_irqsave(hba->host->host_lock, flags);

- if (hba->cardtype == st_yel && hba->supports_pm == 1)
- {
- if(st_sleep_mic == ST_NOTHANDLED)
- {
+ if ((hba->cardtype == st_yel || hba->cardtype == st_P3) &&
+ hba->supports_pm == 1) {
+ if (st_sleep_mic == ST_NOTHANDLED) {
spin_unlock_irqrestore(hba->host->host_lock, flags);
return;
}
}
req = hba->alloc_rq(hba);
- if (hba->cardtype == st_yel) {
+ if (hba->cardtype == st_yel || hba->cardtype == st_P3) {
msg_h = (struct st_msg_header *)req - 1;
memset(msg_h, 0, hba->rq_size);
} else
memset(req, 0, hba->rq_size);

- if ((hba->cardtype == st_yosemite || hba->cardtype == st_yel)
+ if ((hba->cardtype == st_yosemite || hba->cardtype == st_yel
+ || hba->cardtype == st_P3)
&& st_sleep_mic == ST_IGNORED) {
req->cdb[0] = MGT_CMD;
req->cdb[1] = MGT_CMD_SIGNATURE;
req->cdb[2] = CTLR_CONFIG_CMD;
req->cdb[3] = CTLR_SHUTDOWN;
- } else if (hba->cardtype == st_yel && st_sleep_mic != ST_IGNORED) {
+ } else if ((hba->cardtype == st_yel || hba->cardtype == st_P3)
+ && st_sleep_mic != ST_IGNORED) {
req->cdb[0] = MGT_CMD;
req->cdb[1] = MGT_CMD_SIGNATURE;
req->cdb[2] = CTLR_CONFIG_CMD;
@@ -1768,16 +1879,13 @@ static void stex_hba_stop(struct st_hba *hba, int st_sleep_mic)
req->cdb[1] = CTLR_POWER_STATE_CHANGE;
req->cdb[2] = CTLR_POWER_SAVING;
}
-
hba->ccb[tag].cmd = NULL;
hba->ccb[tag].sg_count = 0;
hba->ccb[tag].sense_bufflen = 0;
hba->ccb[tag].sense_buffer = NULL;
hba->ccb[tag].req_type = PASSTHRU_REQ_TYPE;
-
hba->send(hba, req, tag);
spin_unlock_irqrestore(hba->host->host_lock, flags);
-
before = jiffies;
while (hba->ccb[tag].req_type & PASSTHRU_REQ_TYPE) {
if (time_after(jiffies, before + ST_INTERNAL_TIMEOUT * HZ)) {
@@ -1833,12 +1941,13 @@ static void stex_shutdown(struct pci_dev *pdev)
stex_hba_stop(hba, ST_S5);
}

-static int stex_choice_sleep_mic(pm_message_t state)
+static int stex_choice_sleep_mic(struct st_hba *hba, pm_message_t state)
{
switch (state.event) {
case PM_EVENT_SUSPEND:
return ST_S3;
case PM_EVENT_HIBERNATE:
+ hba->msi_lock = 0;
return ST_S4;
default:
return ST_NOTHANDLED;
@@ -1849,8 +1958,9 @@ static int stex_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct st_hba *hba = pci_get_drvdata(pdev);

- if (hba->cardtype == st_yel && hba->supports_pm == 1)
- stex_hba_stop(hba, stex_choice_sleep_mic(state));
+ if ((hba->cardtype == st_yel || hba->cardtype == st_P3)
+ && hba->supports_pm == 1)
+ stex_hba_stop(hba, stex_choice_sleep_mic(hba, state));
else
stex_hba_stop(hba, ST_IGNORED);
return 0;
--
1.9.1