Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 52358aad authored by Sunil Goutham's avatar Sunil Goutham Committed by David S. Miller
Browse files

net: thunderx: Enable mailbox interrupts on 81xx/83xx 



88xx has 128 VFs, 81xx has 8 VFs and 83xx will have 32VFs.
Made changes to PF driver such that mailbox interrupt enable
registers are configuired based on number of VFs HW supports.
Also cleanedup mailbox irq handler registration code.

Signed-off-by: default avatarSunil Goutham <sgoutham@cavium.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 02a72bd8

drivers/net/ethernet/cavium/thunder/nic_main.c

+50 −38
Original line number Diff line number Diff line
@@ -66,8 +66,9 @@ struct nicpf { 
	/* MSI-X */

	bool			msix_enabled;

	u8			num_vec;

	struct msix_entry	msix_entries[NIC_PF_MSIX_VECTORS];

	struct msix_entry	*msix_entries;

	bool			irq_allocated[NIC_PF_MSIX_VECTORS];

	char			irq_name[NIC_PF_MSIX_VECTORS][20];

};



/* Supported devices */
@@ -105,9 +106,22 @@ static u64 nic_reg_read(struct nicpf *nic, u64 offset) 
/* PF -> VF mailbox communication APIs */

static void nic_enable_mbx_intr(struct nicpf *nic)

{

	/* Enable mailbox interrupt for all 128 VFs */

	nic_reg_write(nic, NIC_PF_MAILBOX_ENA_W1S, ~0ull);

	nic_reg_write(nic, NIC_PF_MAILBOX_ENA_W1S + sizeof(u64), ~0ull);

	int vf_cnt = pci_sriov_get_totalvfs(nic->pdev);



#define INTR_MASK(vfs) ((vfs < 64) ? (BIT_ULL(vfs) - 1) : (~0ull))



	/* Clear it, to avoid spurious interrupts (if any) */

	nic_reg_write(nic, NIC_PF_MAILBOX_INT, INTR_MASK(vf_cnt));



	/* Enable mailbox interrupt for all VFs */

	nic_reg_write(nic, NIC_PF_MAILBOX_ENA_W1S, INTR_MASK(vf_cnt));

	/* One mailbox intr enable reg per 64 VFs */

	if (vf_cnt > 64) {

		nic_reg_write(nic, NIC_PF_MAILBOX_INT + sizeof(u64),

			      INTR_MASK(vf_cnt - 64));

		nic_reg_write(nic, NIC_PF_MAILBOX_ENA_W1S + sizeof(u64),

			      INTR_MASK(vf_cnt - 64));

	}

}



static void nic_clear_mbx_intr(struct nicpf *nic, int vf, int mbx_reg)
@@ -894,11 +908,18 @@ static void nic_handle_mbx_intr(struct nicpf *nic, int vf) 
	nic->mbx_lock[vf] = false;

}



static void nic_mbx_intr_handler (struct nicpf *nic, int mbx)

static irqreturn_t nic_mbx_intr_handler(int irq, void *nic_irq)

{

	struct nicpf *nic = (struct nicpf *)nic_irq;

	int mbx;

	u64 intr;

	u8  vf, vf_per_mbx_reg = 64;



	if (irq == nic->msix_entries[NIC_PF_INTR_ID_MBOX0].vector)

		mbx = 0;

	else

		mbx = 1;



	intr = nic_reg_read(nic, NIC_PF_MAILBOX_INT + (mbx << 3));

	dev_dbg(&nic->pdev->dev, "PF interrupt Mbox%d 0x%llx\n", mbx, intr);

	for (vf = 0; vf < vf_per_mbx_reg; vf++) {
@@ -910,23 +931,6 @@ static void nic_mbx_intr_handler (struct nicpf *nic, int mbx) 
			nic_clear_mbx_intr(nic, vf, mbx);

		}

	}

}



static irqreturn_t nic_mbx0_intr_handler (int irq, void *nic_irq)

{

	struct nicpf *nic = (struct nicpf *)nic_irq;



	nic_mbx_intr_handler(nic, 0);



	return IRQ_HANDLED;

}



static irqreturn_t nic_mbx1_intr_handler (int irq, void *nic_irq)

{

	struct nicpf *nic = (struct nicpf *)nic_irq;



	nic_mbx_intr_handler(nic, 1);



	return IRQ_HANDLED;

}
@@ -934,7 +938,13 @@ static int nic_enable_msix(struct nicpf *nic) 
{

	int i, ret;



	nic->num_vec = NIC_PF_MSIX_VECTORS;

	nic->num_vec = pci_msix_vec_count(nic->pdev);



	nic->msix_entries = kmalloc_array(nic->num_vec,

					  sizeof(struct msix_entry),

					  GFP_KERNEL);

	if (!nic->msix_entries)

		return -ENOMEM;



	for (i = 0; i < nic->num_vec; i++)

		nic->msix_entries[i].entry = i;
@@ -942,8 +952,9 @@ static int nic_enable_msix(struct nicpf *nic) 
	ret = pci_enable_msix(nic->pdev, nic->msix_entries, nic->num_vec);

	if (ret) {

		dev_err(&nic->pdev->dev,

			"Request for #%d msix vectors failed\n",

			   nic->num_vec);

			"Request for #%d msix vectors failed, returned %d\n",

			   nic->num_vec, ret);

		kfree(nic->msix_entries);

		return ret;

	}
@@ -955,6 +966,7 @@ static void nic_disable_msix(struct nicpf *nic) 
{

	if (nic->msix_enabled) {

		pci_disable_msix(nic->pdev);

		kfree(nic->msix_entries);

		nic->msix_enabled = 0;

		nic->num_vec = 0;

	}
@@ -973,27 +985,26 @@ static void nic_free_all_interrupts(struct nicpf *nic) 


static int nic_register_interrupts(struct nicpf *nic)

{

	int ret;

	int i, ret;



	/* Enable MSI-X */

	ret = nic_enable_msix(nic);

	if (ret)

		return ret;



	/* Register mailbox interrupt handlers */

	ret = request_irq(nic->msix_entries[NIC_PF_INTR_ID_MBOX0].vector,

			  nic_mbx0_intr_handler, 0, "NIC Mbox0", nic);

	if (ret)

		goto fail;

	/* Register mailbox interrupt handler */

	for (i = NIC_PF_INTR_ID_MBOX0; i < nic->num_vec; i++) {

		sprintf(nic->irq_name[i],

			"NICPF Mbox%d", (i - NIC_PF_INTR_ID_MBOX0));



	nic->irq_allocated[NIC_PF_INTR_ID_MBOX0] = true;



	ret = request_irq(nic->msix_entries[NIC_PF_INTR_ID_MBOX1].vector,

			  nic_mbx1_intr_handler, 0, "NIC Mbox1", nic);

		ret = request_irq(nic->msix_entries[i].vector,

				  nic_mbx_intr_handler, 0,

				  nic->irq_name[i], nic);

		if (ret)

			goto fail;



	nic->irq_allocated[NIC_PF_INTR_ID_MBOX1] = true;

		nic->irq_allocated[i] = true;

	}



	/* Enable mailbox interrupt */

	nic_enable_mbx_intr(nic);
@@ -1002,6 +1013,7 @@ static int nic_register_interrupts(struct nicpf *nic) 
fail:

	dev_err(&nic->pdev->dev, "Request irq failed\n");

	nic_free_all_interrupts(nic);

	nic_disable_msix(nic);

	return ret;

}