drivers/net/qlge/qlge_mpi.c

#include "qlge.h"

int ql_read_mpi_reg(struct ql_adapter *qdev, u32 reg, u32 *data)
{
	int status;
	/* wait for reg to come ready */
	status = ql_wait_reg_rdy(qdev, PROC_ADDR, PROC_ADDR_RDY, PROC_ADDR_ERR);
	if (status)
		goto exit;
	/* set up for reg read */
	ql_write32(qdev, PROC_ADDR, reg | PROC_ADDR_R);
	/* wait for reg to come ready */
	status = ql_wait_reg_rdy(qdev, PROC_ADDR, PROC_ADDR_RDY, PROC_ADDR_ERR);
	if (status)
		goto exit;
	/* get the data */
	*data = ql_read32(qdev, PROC_DATA);
exit:
	return status;
}

int ql_write_mpi_reg(struct ql_adapter *qdev, u32 reg, u32 data)
{
	int status = 0;
	/* wait for reg to come ready */
	status = ql_wait_reg_rdy(qdev, PROC_ADDR, PROC_ADDR_RDY, PROC_ADDR_ERR);
	if (status)
		goto exit;
	/* write the data to the data reg */
	ql_write32(qdev, PROC_DATA, data);
	/* trigger the write */
	ql_write32(qdev, PROC_ADDR, reg);
	/* wait for reg to come ready */
	status = ql_wait_reg_rdy(qdev, PROC_ADDR, PROC_ADDR_RDY, PROC_ADDR_ERR);
	if (status)
		goto exit;
exit:
	return status;
}

int ql_soft_reset_mpi_risc(struct ql_adapter *qdev)
{
	int status;
	status = ql_write_mpi_reg(qdev, 0x00001010, 1);
	return status;
}

static int ql_get_mb_sts(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
	int i, status;

	status = ql_sem_spinlock(qdev, SEM_PROC_REG_MASK);
	if (status)
		return -EBUSY;
	for (i = 0; i < mbcp->out_count; i++) {
		status =
		    ql_read_mpi_reg(qdev, qdev->mailbox_out + i,
				     &mbcp->mbox_out[i]);
		if (status) {
			QPRINTK(qdev, DRV, ERR, "Failed mailbox read.\n");
			break;
		}
	}
	ql_sem_unlock(qdev, SEM_PROC_REG_MASK);	/* does flush too */
	return status;
}

static void ql_link_up(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
	mbcp->out_count = 2;

	if (ql_get_mb_sts(qdev, mbcp))
		goto exit;

	qdev->link_status = mbcp->mbox_out[1];
	QPRINTK(qdev, DRV, ERR, "Link Up.\n");
	QPRINTK(qdev, DRV, INFO, "Link Status = 0x%.08x.\n", mbcp->mbox_out[1]);
	if (!netif_carrier_ok(qdev->ndev)) {
		QPRINTK(qdev, LINK, INFO, "Link is Up.\n");
		netif_carrier_on(qdev->ndev);
		netif_wake_queue(qdev->ndev);
	}
exit:
	/* Clear the MPI firmware status. */
	ql_write32(qdev, CSR, CSR_CMD_CLR_R2PCI_INT);
}

static void ql_link_down(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
	mbcp->out_count = 3;

	if (ql_get_mb_sts(qdev, mbcp)) {
		QPRINTK(qdev, DRV, ERR, "Firmware did not initialize!\n");
		goto exit;
	}

	if (netif_carrier_ok(qdev->ndev)) {
		QPRINTK(qdev, LINK, INFO, "Link is Down.\n");
		netif_carrier_off(qdev->ndev);
		netif_stop_queue(qdev->ndev);
	}
	QPRINTK(qdev, DRV, ERR, "Link Down.\n");
	QPRINTK(qdev, DRV, ERR, "Link Status = 0x%.08x.\n", mbcp->mbox_out[1]);
exit:
	/* Clear the MPI firmware status. */
	ql_write32(qdev, CSR, CSR_CMD_CLR_R2PCI_INT);
}

static void ql_init_fw_done(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
	mbcp->out_count = 2;

	if (ql_get_mb_sts(qdev, mbcp)) {
		QPRINTK(qdev, DRV, ERR, "Firmware did not initialize!\n");
		goto exit;
	}
	QPRINTK(qdev, DRV, ERR, "Firmware initialized!\n");
	QPRINTK(qdev, DRV, ERR, "Firmware status = 0x%.08x.\n",
		mbcp->mbox_out[0]);
	QPRINTK(qdev, DRV, ERR, "Firmware Revision  = 0x%.08x.\n",
		mbcp->mbox_out[1]);
exit:
	/* Clear the MPI firmware status. */
	ql_write32(qdev, CSR, CSR_CMD_CLR_R2PCI_INT);
}

/* Process an async event and clear it unless it's an
 * error condition.
 *  This can get called iteratively from the mpi_work thread
 *  when events arrive via an interrupt.
 *  It also gets called when a mailbox command is polling for
 *  it's completion. */
static int ql_mpi_handler(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
	int status;

	/* Just get mailbox zero for now. */
	mbcp->out_count = 1;
	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);
		goto end;
	}

	switch (mbcp->mbox_out[0]) {

	case AEN_LINK_UP:
		ql_link_up(qdev, mbcp);
		break;

	case AEN_LINK_DOWN:
		ql_link_down(qdev, mbcp);
		break;

	case AEN_FW_INIT_DONE:
		ql_init_fw_done(qdev, mbcp);
		break;

	case MB_CMD_STS_GOOD:
		break;

	case AEN_FW_INIT_FAIL:
	case AEN_SYS_ERR:
	case MB_CMD_STS_ERR:
		ql_queue_fw_error(qdev);
		break;

	default:
		QPRINTK(qdev, DRV, ERR,
			"Unsupported AE %.08x.\n", mbcp->mbox_out[0]);
		/* Clear the MPI firmware status. */
	}
end:
	ql_write32(qdev, CSR, CSR_CMD_CLR_R2PCI_INT);
	return status;
}

void ql_mpi_work(struct work_struct *work)
{
	struct ql_adapter *qdev =
	    container_of(work, struct ql_adapter, mpi_work.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);
}

void ql_mpi_reset_work(struct work_struct *work)
{
	struct ql_adapter *qdev =
	    container_of(work, struct ql_adapter, mpi_reset_work.work);
	ql_soft_reset_mpi_risc(qdev);
}