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Date: Fri, 23 Jan 2009 07:16:38 -0800
From: Ron Mercer <ron.mercer@...gic.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, linux-driver@...gic.com,
ron.mercer@...gic.com
Subject: [PATCH 20/21] [next] qlge: Add mailbox command support.
Signed-off-by: Ron Mercer <ron.mercer@...gic.com>
---
drivers/net/qlge/qlge.h | 4 +
drivers/net/qlge/qlge_main.c | 4 +-
drivers/net/qlge/qlge_mpi.c | 273 +++++++++++++++++++++++++++++++++++++++++-
3 files changed, 279 insertions(+), 2 deletions(-)
mode change 100755 => 100644 drivers/net/qlge/qlge.h
diff --git a/drivers/net/qlge/qlge.h b/drivers/net/qlge/qlge.h
old mode 100755
new mode 100644
index 2f3ca60..afc9a3b
--- a/drivers/net/qlge/qlge.h
+++ b/drivers/net/qlge/qlge.h
@@ -1425,6 +1425,8 @@ struct ql_adapter {
u32 mailbox_in;
u32 mailbox_out;
+ struct mbox_params idc_mbc;
+ struct mutex mpi_mutex;
int tx_ring_size;
int rx_ring_size;
@@ -1471,6 +1473,7 @@ struct ql_adapter {
struct delayed_work asic_reset_work;
struct delayed_work mpi_reset_work;
struct delayed_work mpi_work;
+ struct delayed_work mpi_idc_work;
};
/*
@@ -1538,6 +1541,7 @@ extern int ql_write_cfg(struct ql_adapter *qdev, void *ptr, int size, u32 bit,
void ql_queue_fw_error(struct ql_adapter *qdev);
void ql_mpi_work(struct work_struct *work);
void ql_mpi_reset_work(struct work_struct *work);
+void ql_mpi_idc_work(struct work_struct *work);
int ql_wait_reg_rdy(struct ql_adapter *qdev, u32 reg, u32 bit, u32 ebit);
void ql_queue_asic_error(struct ql_adapter *qdev);
u32 ql_enable_completion_interrupt(struct ql_adapter *qdev, u32 intr);
diff --git a/drivers/net/qlge/qlge_main.c b/drivers/net/qlge/qlge_main.c
index af4b64b..4110402 100644
--- a/drivers/net/qlge/qlge_main.c
+++ b/drivers/net/qlge/qlge_main.c
@@ -2993,7 +2993,7 @@ static int ql_adapter_down(struct ql_adapter *qdev)
cancel_delayed_work_sync(&qdev->asic_reset_work);
cancel_delayed_work_sync(&qdev->mpi_reset_work);
cancel_delayed_work_sync(&qdev->mpi_work);
-
+ cancel_delayed_work_sync(&qdev->mpi_idc_work);
/* The default queue at index 0 is always processed in
* a workqueue.
*/
@@ -3549,6 +3549,8 @@ static int __devinit ql_init_device(struct pci_dev *pdev,
INIT_DELAYED_WORK(&qdev->asic_reset_work, ql_asic_reset_work);
INIT_DELAYED_WORK(&qdev->mpi_reset_work, ql_mpi_reset_work);
INIT_DELAYED_WORK(&qdev->mpi_work, ql_mpi_work);
+ INIT_DELAYED_WORK(&qdev->mpi_idc_work, ql_mpi_idc_work);
+ mutex_init(&qdev->mpi_mutex);
if (!cards_found) {
dev_info(&pdev->dev, "%s\n", DRV_STRING);
diff --git a/drivers/net/qlge/qlge_mpi.c b/drivers/net/qlge/qlge_mpi.c
index 4e336ef..f2f77c6 100644
--- a/drivers/net/qlge/qlge_mpi.c
+++ b/drivers/net/qlge/qlge_mpi.c
@@ -1,5 +1,25 @@
#include "qlge.h"
+static void ql_display_mb_sts(struct ql_adapter *qdev,
+ struct mbox_params *mbcp)
+{
+ int i;
+ static char *err_sts[] = {
+ "Command Complete",
+ "Command Not Supported",
+ "Host Interface Error",
+ "Checksum Error",
+ "Unused Completion Status",
+ "Test Failed",
+ "Command Parameter Error"};
+
+ QPRINTK(qdev, DRV, ERR, "%s.\n",
+ err_sts[mbcp->mbox_out[0] & 0x0000000f]);
+ for (i = 0; i < mbcp->out_count; i++)
+ QPRINTK(qdev, DRV, ERR, "mbox_out[%d] = 0x%.08x.\n",
+ i, mbcp->mbox_out[i]);
+}
+
static int ql_read_mpi_reg(struct ql_adapter *qdev, u32 reg, u32 *data)
{
int status;
@@ -70,6 +90,95 @@ static int ql_get_mb_sts(struct ql_adapter *qdev, struct mbox_params *mbcp)
return status;
}
+/*
+ * Returns zero on success.
+ */
+static int ql_wait_mbx_cmd_cmplt(struct ql_adapter *qdev)
+{
+ int count = 50; /* TODO: arbitrary for now. */
+ u32 value;
+
+ do {
+ value = ql_read32(qdev, STS);
+ if (value & STS_PI)
+ return 0;
+ mdelay(UDELAY_DELAY); /* 10ms */
+ if (!(count%10))
+ QPRINTK(qdev, DRV, DEBUG,
+ "Waiting for mailbox command to complete.\n");
+ } while (--count);
+ return -ETIMEDOUT;
+}
+
+/* Caller must hold PROC_ADDR semaphore */
+static int ql_exec_mb_cmd(struct ql_adapter *qdev, struct mbox_params *mbcp)
+{
+ int i, status;
+
+ /*
+ * Make sure there's nothing pending.
+ * This shouldn't happen.
+ */
+ if (ql_read32(qdev, CSR) & CSR_HRI) {
+ QPRINTK(qdev, DRV, ERR,
+ "%s: CSR_HRI bit set in CSR. Should never happen!\n",
+ __func__);
+ return -EIO;
+ }
+
+ status = ql_sem_spinlock(qdev, SEM_PROC_REG_MASK);
+ if (status) {
+ QPRINTK(qdev, DRV, ERR,
+ "%s: Couldn't get PROC_ADDR semaphore.\n", __func__);
+ return status;
+ }
+
+ /*
+ * Fill the outbound mailboxes.
+ */
+ for (i = 0; i < mbcp->in_count; i++) {
+ status = ql_write_mpi_reg(qdev, qdev->mailbox_in + i,
+ mbcp->mbox_in[i]);
+ if (status)
+ goto end;
+ }
+ /*
+ * Wake up the MPI firmware.
+ */
+ ql_write32(qdev, CSR, CSR_CMD_SET_H2R_INT);
+end:
+ ql_sem_unlock(qdev, SEM_PROC_REG_MASK);
+ return status;
+}
+
+/* MPI Async Event handlers. */
+static int ql_idc_req_aen(struct ql_adapter *qdev)
+{
+ int status;
+ struct mbox_params *mbcp = &qdev->idc_mbc;
+
+ QPRINTK(qdev, DRV, ERR, "Enter!\n");
+ /* Get the status data and start up a thread to
+ * handle the request.
+ */
+ mbcp = &qdev->idc_mbc;
+ mbcp->out_count = 4;
+ status = ql_get_mb_sts(qdev, mbcp);
+ if (status) {
+ QPRINTK(qdev, DRV, ERR,
+ "Could not read MPI, resetting ASIC!\n");
+ ql_queue_asic_error(qdev);
+ } else {
+ /* Begin polled mode early so
+ * we don't get another interrupt
+ * when we leave mpi_worker.
+ */
+ ql_write32(qdev, INTR_MASK, (INTR_MASK_PI << 16));
+ queue_delayed_work(qdev->workqueue, &qdev->mpi_idc_work, 0);
+ }
+ return status;
+}
+
static void ql_link_up(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
int status = 0;
@@ -187,6 +296,7 @@ static void ql_init_fw_done(struct ql_adapter *qdev, struct mbox_params *mbcp)
static int ql_mpi_handler(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
int status;
+ int orig_count = mbcp->out_count;
/* Just get mailbox zero for now. */
mbcp->out_count = 1;
@@ -200,6 +310,27 @@ static int ql_mpi_handler(struct ql_adapter *qdev, struct mbox_params *mbcp)
switch (mbcp->mbox_out[0]) {
+ case MB_CMD_STS_INTRMDT:
+ case MB_CMD_STS_GOOD:
+ case MB_CMD_STS_INVLD_CMD:
+ case MB_CMD_STS_XFC_ERR:
+ case MB_CMD_STS_CSUM_ERR:
+ case MB_CMD_STS_ERR:
+ case MB_CMD_STS_PARAM_ERR:
+ /* We can only get mailbox status if we're polling from an
+ * unfinished command. Get the rest of the status data and
+ * return back to the caller.
+ * We only end up here when we're polling for a mailbox
+ * command completion.
+ */
+ mbcp->out_count = orig_count;
+ status = ql_get_mb_sts(qdev, mbcp);
+ return status;
+
+ case AEN_IDC_REQ:
+ status = ql_idc_req_aen(qdev);
+ break;
+
case AEN_LINK_UP:
ql_link_up(qdev, mbcp);
break;
@@ -226,7 +357,6 @@ static int ql_mpi_handler(struct ql_adapter *qdev, struct mbox_params *mbcp)
case AEN_FW_INIT_FAIL:
case AEN_SYS_ERR:
- case MB_CMD_STS_ERR:
default:
ql_queue_fw_error(qdev);
QPRINTK(qdev, DRV, ERR,
@@ -238,6 +368,145 @@ end:
return status;
}
+static int ql_mailbox_command(struct ql_adapter *qdev, struct mbox_params *mbcp)
+{
+ int status, count;
+
+ mutex_lock(&qdev->mpi_mutex);
+
+ /* Begin polled mode for MPI */
+ ql_write32(qdev, INTR_MASK, (INTR_MASK_PI << 16));
+
+ /* Load the mailbox registers and wake up MPI RISC. */
+ status = ql_exec_mb_cmd(qdev, mbcp);
+ if (status)
+ goto end;
+
+
+ /* If we're generating a system error, then there's nothing
+ * to wait for.
+ */
+ if (mbcp->mbox_in[0] == MB_CMD_MAKE_SYS_ERR)
+ goto end;
+
+ /* Wait for the command to complete. We loop
+ * here because some AEN might arrive while
+ * we're waiting for the mailbox command to
+ * complete. If more than 5 arrive then we can
+ * assume something is wrong. */
+ count = 5;
+ do {
+ /* Wait for the interrupt to come in. */
+ status = ql_wait_mbx_cmd_cmplt(qdev);
+ if (status) {
+ QPRINTK(qdev, DRV, ERR,
+ "Failed ql_wait_mbx_cmd_cmplt(),"
+ " status = %d.\n",
+ status);
+ goto end;
+ }
+
+ /* Process the event. If it's an AEN, it
+ * will be handled in-line or a worker
+ * will be spawned. If it's our completion
+ * we will catch it below.
+ */
+ status = ql_mpi_handler(qdev, mbcp);
+ if (status) {
+ QPRINTK(qdev, DRV, ERR,
+ "Failed ql_mpi_hander(), status = %d.\n",
+ status);
+ goto end;
+ }
+
+ /* It's either the completion for our mailbox
+ * command complete or an AEN. If it's our
+ * completion then get out.
+ */
+ if ((mbcp->mbox_out[0] & 0x0000f000) ==
+ 0x00004000)
+ break;
+ } while (--count);
+
+ if (!count) {
+ QPRINTK(qdev, DRV, ERR,
+ "Timed out waiting for mailbox complet.\n");
+ status = -ETIMEDOUT;
+ goto end;
+ }
+
+ /* Now we can clear the interrupt condition
+ * and look at our status.
+ */
+ ql_write32(qdev, CSR, CSR_CMD_CLR_R2PCI_INT);
+
+ if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
+ ql_display_mb_sts(qdev, mbcp);
+ status = -EIO;
+ }
+end:
+ mutex_unlock(&qdev->mpi_mutex);
+ /* End polled mode for MPI */
+ ql_write32(qdev, INTR_MASK, (INTR_MASK_PI << 16) | INTR_MASK_PI);
+ return status;
+}
+int ql_mb_idc_ack(struct ql_adapter *qdev)
+{
+ struct mbox_params mbc;
+ struct mbox_params *mbcp = &mbc;
+ int status = 0;
+
+ memset(mbcp, 0, sizeof(struct mbox_params));
+
+ mbcp->in_count = 5;
+ mbcp->out_count = 1;
+
+ mbcp->mbox_in[0] = MB_CMD_IDC_ACK;
+ mbcp->mbox_in[1] = qdev->idc_mbc.mbox_out[1];
+ mbcp->mbox_in[2] = qdev->idc_mbc.mbox_out[2];
+ mbcp->mbox_in[3] = qdev->idc_mbc.mbox_out[3];
+ mbcp->mbox_in[4] = qdev->idc_mbc.mbox_out[4];
+
+ status = ql_mailbox_command(qdev, mbcp);
+ if (status)
+ return status;
+
+ if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
+ QPRINTK(qdev, DRV, ERR,
+ "Failed IDC ACK send.\n");
+ status = -EIO;
+ }
+ return status;
+}
+
+void ql_mpi_idc_work(struct work_struct *work)
+{
+ struct ql_adapter *qdev =
+ container_of(work, struct ql_adapter, mpi_idc_work.work);
+ int status;
+ struct mbox_params *mbcp = &qdev->idc_mbc;
+ u32 aen;
+
+ aen = mbcp->mbox_out[1] >> 16;
+
+ switch (aen) {
+ default:
+ QPRINTK(qdev, DRV, ERR,
+ "Bug: Unhandled IDC action.\n");
+ break;
+ case MB_CMD_PORT_RESET:
+ case MB_CMD_SET_PORT_CFG:
+ case MB_CMD_STOP_FW:
+ ql_link_off(qdev);
+ set_bit(QL_CAM_RT_SET, &qdev->flags);
+ status = ql_mb_idc_ack(qdev);
+ if (status) {
+ QPRINTK(qdev, DRV, ERR,
+ "Bug: No pending IDC!\n");
+ }
+ }
+}
+
void ql_mpi_work(struct work_struct *work)
{
struct ql_adapter *qdev =
@@ -245,12 +514,14 @@ void ql_mpi_work(struct work_struct *work)
struct mbox_params mbc;
struct mbox_params *mbcp = &mbc;
+ mutex_lock(&qdev->mpi_mutex);
while (ql_read32(qdev, STS) & STS_PI) {
memset(mbcp, 0, sizeof(struct mbox_params));
mbcp->out_count = 1;
ql_mpi_handler(qdev, mbcp);
}
+ mutex_unlock(&qdev->mpi_mutex);
ql_enable_completion_interrupt(qdev, 0);
}
--
1.6.0.2
--
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