[net-next PATCH] octeon_ep: restructured interrupt handlers

From: Shinas Rasheed
Date: Mon Sep 18 2023 - 02:57:45 EST

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Separated queue specific interrupts to register to individual msix-vectors
instead of using a single generic interrupt handler on a single
msix-vector.

Signed-off-by: Shinas Rasheed <srasheed@xxxxxxxxxxx>
---
.../marvell/octeon_ep/octep_cn9k_pf.c | 158 ++++++++++----
.../ethernet/marvell/octeon_ep/octep_main.c | 197 +++++++++++++++++-
.../ethernet/marvell/octeon_ep/octep_main.h | 13 +-
3 files changed, 323 insertions(+), 45 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_cn9k_pf.c b/drivers/net/ethernet/marvell/octeon_ep/octep_cn9k_pf.c
index f282cd5b29ea..d4ee2454675b 100644
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_cn9k_pf.c
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_cn9k_pf.c
@@ -369,34 +369,40 @@ static void octep_setup_mbox_regs_cn93_pf(struct octep_device *oct, int q_no)
mbox->mbox_read_reg = oct->mmio[0].hw_addr + CN93_SDP_R_MBOX_VF_PF_DATA(q_no);
}

-/* Process non-ioq interrupts required to keep pf interface running.
- * OEI_RINT is needed for control mailbox
- */
-static bool octep_poll_non_ioq_interrupts_cn93_pf(struct octep_device *oct)
-{
- bool handled = false;
- u64 reg0;
-
- /* Check for OEI INTR */
- reg0 = octep_read_csr64(oct, CN93_SDP_EPF_OEI_RINT);
- if (reg0) {
- dev_info(&oct->pdev->dev,
- "Received OEI_RINT intr: 0x%llx\n",
- reg0);
- octep_write_csr64(oct, CN93_SDP_EPF_OEI_RINT, reg0);
- if (reg0 & CN93_SDP_EPF_OEI_RINT_DATA_BIT_MBOX)
+/* Poll OEI events like heartbeat */
+static void octep_poll_oei_cn93_pf(struct octep_device *oct)
+{
+ u64 reg;
+
+ reg = octep_read_csr64(oct, CN93_SDP_EPF_OEI_RINT);
+ if (reg) {
+ octep_write_csr64(oct, CN93_SDP_EPF_OEI_RINT, reg);
+ if (reg & CN93_SDP_EPF_OEI_RINT_DATA_BIT_MBOX)
queue_work(octep_wq, &oct->ctrl_mbox_task);
- else if (reg0 & CN93_SDP_EPF_OEI_RINT_DATA_BIT_HBEAT)
+ else if (reg & CN93_SDP_EPF_OEI_RINT_DATA_BIT_HBEAT)
atomic_set(&oct->hb_miss_cnt, 0);
-
- handled = true;
}
+}
+
+/* OEI interrupt handler */
+static irqreturn_t octep_oei_intr_handler_cn93_pf(void *dev)
+{
+ struct octep_device *oct = (struct octep_device *)dev;

- return handled;
+ octep_poll_oei_cn93_pf(oct);
+ return IRQ_HANDLED;
+}
+
+/* Process non-ioq interrupts required to keep pf interface running.
+ * OEI_RINT is needed for control mailbox
+ */
+static void octep_poll_non_ioq_interrupts_cn93_pf(struct octep_device *oct)
+{
+ octep_poll_oei_cn93_pf(oct);
}

-/* Interrupts handler for all non-queue generic interrupts. */
-static irqreturn_t octep_non_ioq_intr_handler_cn93_pf(void *dev)
+/* Interrupt handler for input ring error interrupts. */
+static irqreturn_t octep_ire_intr_handler_cn93_pf(void *dev)
{
struct octep_device *oct = (struct octep_device *)dev;
struct pci_dev *pdev = oct->pdev;
@@ -421,8 +427,17 @@ static irqreturn_t octep_non_ioq_intr_handler_cn93_pf(void *dev)
reg_val);
}
}
- goto irq_handled;
}
+ return IRQ_HANDLED;
+}
+
+/* Interrupt handler for output ring error interrupts. */
+static irqreturn_t octep_ore_intr_handler_cn93_pf(void *dev)
+{
+ struct octep_device *oct = (struct octep_device *)dev;
+ struct pci_dev *pdev = oct->pdev;
+ u64 reg_val = 0;
+ int i = 0;

/* Check for ORERR INTR */
reg_val = octep_read_csr64(oct, CN93_SDP_EPF_ORERR_RINT);
@@ -440,9 +455,16 @@ static irqreturn_t octep_non_ioq_intr_handler_cn93_pf(void *dev)
reg_val);
}
}
-
- goto irq_handled;
}
+ return IRQ_HANDLED;
+}
+
+/* Interrupt handler for vf input ring error interrupts. */
+static irqreturn_t octep_vfire_intr_handler_cn93_pf(void *dev)
+{
+ struct octep_device *oct = (struct octep_device *)dev;
+ struct pci_dev *pdev = oct->pdev;
+ u64 reg_val = 0;

/* Check for VFIRE INTR */
reg_val = octep_read_csr64(oct, CN93_SDP_EPF_VFIRE_RINT(0));
@@ -450,8 +472,16 @@ static irqreturn_t octep_non_ioq_intr_handler_cn93_pf(void *dev)
dev_info(&pdev->dev,
"Received VFIRE_RINT intr: 0x%llx\n", reg_val);
octep_write_csr64(oct, CN93_SDP_EPF_VFIRE_RINT(0), reg_val);
- goto irq_handled;
}
+ return IRQ_HANDLED;
+}
+
+/* Interrupt handler for vf output ring error interrupts. */
+static irqreturn_t octep_vfore_intr_handler_cn93_pf(void *dev)
+{
+ struct octep_device *oct = (struct octep_device *)dev;
+ struct pci_dev *pdev = oct->pdev;
+ u64 reg_val = 0;

/* Check for VFORE INTR */
reg_val = octep_read_csr64(oct, CN93_SDP_EPF_VFORE_RINT(0));
@@ -459,19 +489,30 @@ static irqreturn_t octep_non_ioq_intr_handler_cn93_pf(void *dev)
dev_info(&pdev->dev,
"Received VFORE_RINT intr: 0x%llx\n", reg_val);
octep_write_csr64(oct, CN93_SDP_EPF_VFORE_RINT(0), reg_val);
- goto irq_handled;
}
+ return IRQ_HANDLED;
+}

- /* Check for MBOX INTR and OEI INTR */
- if (octep_poll_non_ioq_interrupts_cn93_pf(oct))
- goto irq_handled;
+/* Interrupt handler for dpi dma related interrupts. */
+static irqreturn_t octep_dma_intr_handler_cn93_pf(void *dev)
+{
+ struct octep_device *oct = (struct octep_device *)dev;
+ u64 reg_val = 0;

/* Check for DMA INTR */
reg_val = octep_read_csr64(oct, CN93_SDP_EPF_DMA_RINT);
if (reg_val) {
octep_write_csr64(oct, CN93_SDP_EPF_DMA_RINT, reg_val);
- goto irq_handled;
}
+ return IRQ_HANDLED;
+}
+
+/* Interrupt handler for dpi dma transaction error interrupts for VFs */
+static irqreturn_t octep_dma_vf_intr_handler_cn93_pf(void *dev)
+{
+ struct octep_device *oct = (struct octep_device *)dev;
+ struct pci_dev *pdev = oct->pdev;
+ u64 reg_val = 0;

/* Check for DMA VF INTR */
reg_val = octep_read_csr64(oct, CN93_SDP_EPF_DMA_VF_RINT(0));
@@ -479,8 +520,16 @@ static irqreturn_t octep_non_ioq_intr_handler_cn93_pf(void *dev)
dev_info(&pdev->dev,
"Received DMA_VF_RINT intr: 0x%llx\n", reg_val);
octep_write_csr64(oct, CN93_SDP_EPF_DMA_VF_RINT(0), reg_val);
- goto irq_handled;
}
+ return IRQ_HANDLED;
+}
+
+/* Interrupt handler for pp transaction error interrupts for VFs */
+static irqreturn_t octep_pp_vf_intr_handler_cn93_pf(void *dev)
+{
+ struct octep_device *oct = (struct octep_device *)dev;
+ struct pci_dev *pdev = oct->pdev;
+ u64 reg_val = 0;

/* Check for PPVF INTR */
reg_val = octep_read_csr64(oct, CN93_SDP_EPF_PP_VF_RINT(0));
@@ -488,8 +537,16 @@ static irqreturn_t octep_non_ioq_intr_handler_cn93_pf(void *dev)
dev_info(&pdev->dev,
"Received PP_VF_RINT intr: 0x%llx\n", reg_val);
octep_write_csr64(oct, CN93_SDP_EPF_PP_VF_RINT(0), reg_val);
- goto irq_handled;
}
+ return IRQ_HANDLED;
+}
+
+/* Interrupt handler for mac related interrupts. */
+static irqreturn_t octep_misc_intr_handler_cn93_pf(void *dev)
+{
+ struct octep_device *oct = (struct octep_device *)dev;
+ struct pci_dev *pdev = oct->pdev;
+ u64 reg_val = 0;

/* Check for MISC INTR */
reg_val = octep_read_csr64(oct, CN93_SDP_EPF_MISC_RINT);
@@ -497,11 +554,17 @@ static irqreturn_t octep_non_ioq_intr_handler_cn93_pf(void *dev)
dev_info(&pdev->dev,
"Received MISC_RINT intr: 0x%llx\n", reg_val);
octep_write_csr64(oct, CN93_SDP_EPF_MISC_RINT, reg_val);
- goto irq_handled;
}
+ return IRQ_HANDLED;
+}
+
+/* Interrupts handler for all reserved interrupts. */
+static irqreturn_t octep_rsvd_intr_handler_cn93_pf(void *dev)
+{
+ struct octep_device *oct = (struct octep_device *)dev;
+ struct pci_dev *pdev = oct->pdev;

dev_info(&pdev->dev, "Reserved interrupts raised; Ignore\n");
-irq_handled:
return IRQ_HANDLED;
}

@@ -565,8 +628,15 @@ static void octep_enable_interrupts_cn93_pf(struct octep_device *oct)
octep_write_csr64(oct, CN93_SDP_EPF_IRERR_RINT_ENA_W1S, intr_mask);
octep_write_csr64(oct, CN93_SDP_EPF_ORERR_RINT_ENA_W1S, intr_mask);
octep_write_csr64(oct, CN93_SDP_EPF_OEI_RINT_ENA_W1S, -1ULL);
+
+ octep_write_csr64(oct, CN93_SDP_EPF_VFIRE_RINT_ENA_W1S(0), -1ULL);
+ octep_write_csr64(oct, CN93_SDP_EPF_VFORE_RINT_ENA_W1S(0), -1ULL);
+
octep_write_csr64(oct, CN93_SDP_EPF_MISC_RINT_ENA_W1S, intr_mask);
octep_write_csr64(oct, CN93_SDP_EPF_DMA_RINT_ENA_W1S, intr_mask);
+
+ octep_write_csr64(oct, CN93_SDP_EPF_DMA_VF_RINT_ENA_W1S(0), -1ULL);
+ octep_write_csr64(oct, CN93_SDP_EPF_PP_VF_RINT_ENA_W1S(0), -1ULL);
}

/* Disable all interrupts */
@@ -584,8 +654,15 @@ static void octep_disable_interrupts_cn93_pf(struct octep_device *oct)
octep_write_csr64(oct, CN93_SDP_EPF_IRERR_RINT_ENA_W1C, intr_mask);
octep_write_csr64(oct, CN93_SDP_EPF_ORERR_RINT_ENA_W1C, intr_mask);
octep_write_csr64(oct, CN93_SDP_EPF_OEI_RINT_ENA_W1C, -1ULL);
+
+ octep_write_csr64(oct, CN93_SDP_EPF_VFIRE_RINT_ENA_W1C(0), -1ULL);
+ octep_write_csr64(oct, CN93_SDP_EPF_VFORE_RINT_ENA_W1C(0), -1ULL);
+
octep_write_csr64(oct, CN93_SDP_EPF_MISC_RINT_ENA_W1C, intr_mask);
octep_write_csr64(oct, CN93_SDP_EPF_DMA_RINT_ENA_W1C, intr_mask);
+
+ octep_write_csr64(oct, CN93_SDP_EPF_DMA_VF_RINT_ENA_W1C(0), -1ULL);
+ octep_write_csr64(oct, CN93_SDP_EPF_PP_VF_RINT_ENA_W1C(0), -1ULL);
}

/* Get new Octeon Read Index: index of descriptor that Octeon reads next. */
@@ -718,7 +795,16 @@ void octep_device_setup_cn93_pf(struct octep_device *oct)
oct->hw_ops.setup_oq_regs = octep_setup_oq_regs_cn93_pf;
oct->hw_ops.setup_mbox_regs = octep_setup_mbox_regs_cn93_pf;

- oct->hw_ops.non_ioq_intr_handler = octep_non_ioq_intr_handler_cn93_pf;
+ oct->hw_ops.oei_intr_handler = octep_oei_intr_handler_cn93_pf;
+ oct->hw_ops.ire_intr_handler = octep_ire_intr_handler_cn93_pf;
+ oct->hw_ops.ore_intr_handler = octep_ore_intr_handler_cn93_pf;
+ oct->hw_ops.vfire_intr_handler = octep_vfire_intr_handler_cn93_pf;
+ oct->hw_ops.vfore_intr_handler = octep_vfore_intr_handler_cn93_pf;
+ oct->hw_ops.dma_intr_handler = octep_dma_intr_handler_cn93_pf;
+ oct->hw_ops.dma_vf_intr_handler = octep_dma_vf_intr_handler_cn93_pf;
+ oct->hw_ops.pp_vf_intr_handler = octep_pp_vf_intr_handler_cn93_pf;
+ oct->hw_ops.misc_intr_handler = octep_misc_intr_handler_cn93_pf;
+ oct->hw_ops.rsvd_intr_handler = octep_rsvd_intr_handler_cn93_pf;
oct->hw_ops.ioq_intr_handler = octep_ioq_intr_handler_cn93_pf;
oct->hw_ops.soft_reset = octep_soft_reset_cn93_pf;
oct->hw_ops.reinit_regs = octep_reinit_regs_cn93_pf;
diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
index ec3fd7ca3125..a78fa864d053 100644
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
@@ -155,18 +155,153 @@ static void octep_disable_msix(struct octep_device *oct)
}

/**
- * octep_non_ioq_intr_handler() - common handler for all generic interrupts.
+ * octep_oei_intr_handler() - common handler for output endpoint interrupts.
*
* @irq: Interrupt number.
* @data: interrupt data.
*
- * this is common handler for all non-queue (generic) interrupts.
+ * this is common handler for all output endpoint interrupts.
+ */
+static irqreturn_t octep_oei_intr_handler(int irq, void *data)
+{
+ struct octep_device *oct = data;
+
+ return oct->hw_ops.oei_intr_handler(oct);
+}
+
+/**
+ * octep_ire_intr_handler() - common handler for input ring error interrupts.
+ *
+ * @irq: Interrupt number.
+ * @data: interrupt data.
+ *
+ * this is common handler for input ring error interrupts.
+ */
+static irqreturn_t octep_ire_intr_handler(int irq, void *data)
+{
+ struct octep_device *oct = data;
+
+ return oct->hw_ops.ire_intr_handler(oct);
+}
+
+/**
+ * octep_ore_intr_handler() - common handler for output ring error interrupts.
+ *
+ * @irq: Interrupt number.
+ * @data: interrupt data.
+ *
+ * this is common handler for output ring error interrupts.
+ */
+static irqreturn_t octep_ore_intr_handler(int irq, void *data)
+{
+ struct octep_device *oct = data;
+
+ return oct->hw_ops.ore_intr_handler(oct);
+}
+
+/**
+ * octep_vfire_intr_handler() - common handler for vf input ring error interrupts.
+ *
+ * @irq: Interrupt number.
+ * @data: interrupt data.
+ *
+ * this is common handler for vf input ring error interrupts.
+ */
+static irqreturn_t octep_vfire_intr_handler(int irq, void *data)
+{
+ struct octep_device *oct = data;
+
+ return oct->hw_ops.vfire_intr_handler(oct);
+}
+
+/**
+ * octep_vfore_intr_handler() - common handler for vf output ring error interrupts.
+ *
+ * @irq: Interrupt number.
+ * @data: interrupt data.
+ *
+ * this is common handler for vf output ring error interrupts.
*/
-static irqreturn_t octep_non_ioq_intr_handler(int irq, void *data)
+static irqreturn_t octep_vfore_intr_handler(int irq, void *data)
{
struct octep_device *oct = data;

- return oct->hw_ops.non_ioq_intr_handler(oct);
+ return oct->hw_ops.vfore_intr_handler(oct);
+}
+
+/**
+ * octep_dma_intr_handler() - common handler for dpi dma related interrupts.
+ *
+ * @irq: Interrupt number.
+ * @data: interrupt data.
+ *
+ * this is common handler for dpi dma related interrupts.
+ */
+static irqreturn_t octep_dma_intr_handler(int irq, void *data)
+{
+ struct octep_device *oct = data;
+
+ return oct->hw_ops.dma_intr_handler(oct);
+}
+
+/**
+ * octep_dma_vf_intr_handler() - common handler for dpi dma transaction error interrupts for VFs.
+ *
+ * @irq: Interrupt number.
+ * @data: interrupt data.
+ *
+ * this is common handler for dpi dma transaction error interrupts for VFs.
+ */
+static irqreturn_t octep_dma_vf_intr_handler(int irq, void *data)
+{
+ struct octep_device *oct = data;
+
+ return oct->hw_ops.dma_vf_intr_handler(oct);
+}
+
+/**
+ * octep_pp_vf_intr_handler() - common handler for pp transaction error interrupts for VFs.
+ *
+ * @irq: Interrupt number.
+ * @data: interrupt data.
+ *
+ * this is common handler for pp transaction error interrupts for VFs.
+ */
+static irqreturn_t octep_pp_vf_intr_handler(int irq, void *data)
+{
+ struct octep_device *oct = data;
+
+ return oct->hw_ops.pp_vf_intr_handler(oct);
+}
+
+/**
+ * octep_misc_intr_handler() - common handler for mac related interrupts.
+ *
+ * @irq: Interrupt number.
+ * @data: interrupt data.
+ *
+ * this is common handler for mac related interrupts.
+ */
+static irqreturn_t octep_misc_intr_handler(int irq, void *data)
+{
+ struct octep_device *oct = data;
+
+ return oct->hw_ops.misc_intr_handler(oct);
+}
+
+/**
+ * octep_rsvd_intr_handler() - common handler for reserved interrupts (future use).
+ *
+ * @irq: Interrupt number.
+ * @data: interrupt data.
+ *
+ * this is common handler for all reserved interrupts.
+ */
+static irqreturn_t octep_rsvd_intr_handler(int irq, void *data)
+{
+ struct octep_device *oct = data;
+
+ return oct->hw_ops.rsvd_intr_handler(oct);
}

/**
@@ -222,9 +357,57 @@ static int octep_request_irqs(struct octep_device *oct)

snprintf(irq_name, OCTEP_MSIX_NAME_SIZE,
"%s-%s", netdev->name, non_ioq_msix_names[i]);
- ret = request_irq(msix_entry->vector,
- octep_non_ioq_intr_handler, 0,
- irq_name, oct);
+ if (!strncmp(non_ioq_msix_names[i], "epf_oei_rint",
+ strlen("epf_oei_rint"))) {
+ ret = request_irq(msix_entry->vector,
+ octep_oei_intr_handler, 0,
+ irq_name, oct);
+ } else if (!strncmp(non_ioq_msix_names[i], "epf_ire_rint",
+ strlen("epf_ire_rint"))) {
+ ret = request_irq(msix_entry->vector,
+ octep_ire_intr_handler, 0,
+ irq_name, oct);
+ } else if (!strncmp(non_ioq_msix_names[i], "epf_ore_rint",
+ strlen("epf_ore_rint"))) {
+ ret = request_irq(msix_entry->vector,
+ octep_ore_intr_handler, 0,
+ irq_name, oct);
+ } else if (!strncmp(non_ioq_msix_names[i], "epf_vfire_rint",
+ strlen("epf_vfire_rint"))) {
+ ret = request_irq(msix_entry->vector,
+ octep_vfire_intr_handler, 0,
+ irq_name, oct);
+ } else if (!strncmp(non_ioq_msix_names[i], "epf_vfore_rint",
+ strlen("epf_vfore_rint"))) {
+ ret = request_irq(msix_entry->vector,
+ octep_vfore_intr_handler, 0,
+ irq_name, oct);
+ } else if (!strncmp(non_ioq_msix_names[i], "epf_dma_rint",
+ strlen("epf_dma_rint"))) {
+ ret = request_irq(msix_entry->vector,
+ octep_dma_intr_handler, 0,
+ irq_name, oct);
+ } else if (!strncmp(non_ioq_msix_names[i], "epf_dma_vf_rint",
+ strlen("epf_dma_vf_rint"))) {
+ ret = request_irq(msix_entry->vector,
+ octep_dma_vf_intr_handler, 0,
+ irq_name, oct);
+ } else if (!strncmp(non_ioq_msix_names[i], "epf_pp_vf_rint",
+ strlen("epf_pp_vf_rint"))) {
+ ret = request_irq(msix_entry->vector,
+ octep_pp_vf_intr_handler, 0,
+ irq_name, oct);
+ } else if (!strncmp(non_ioq_msix_names[i], "epf_misc_rint",
+ strlen("epf_misc_rint"))) {
+ ret = request_irq(msix_entry->vector,
+ octep_misc_intr_handler, 0,
+ irq_name, oct);
+ } else {
+ ret = request_irq(msix_entry->vector,
+ octep_rsvd_intr_handler, 0,
+ irq_name, oct);
+ }
+
if (ret) {
netdev_err(netdev,
"request_irq failed for %s; err=%d",
diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_main.h b/drivers/net/ethernet/marvell/octeon_ep/octep_main.h
index e0907a719133..6df902ebb7f3 100644
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_main.h
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_main.h
@@ -65,7 +65,16 @@ struct octep_hw_ops {
void (*setup_oq_regs)(struct octep_device *oct, int q);
void (*setup_mbox_regs)(struct octep_device *oct, int mbox);

- irqreturn_t (*non_ioq_intr_handler)(void *ioq_vector);
+ irqreturn_t (*oei_intr_handler)(void *ioq_vector);
+ irqreturn_t (*ire_intr_handler)(void *ioq_vector);
+ irqreturn_t (*ore_intr_handler)(void *ioq_vector);
+ irqreturn_t (*vfire_intr_handler)(void *ioq_vector);
+ irqreturn_t (*vfore_intr_handler)(void *ioq_vector);
+ irqreturn_t (*dma_intr_handler)(void *ioq_vector);
+ irqreturn_t (*dma_vf_intr_handler)(void *ioq_vector);
+ irqreturn_t (*pp_vf_intr_handler)(void *ioq_vector);
+ irqreturn_t (*misc_intr_handler)(void *ioq_vector);
+ irqreturn_t (*rsvd_intr_handler)(void *ioq_vector);
irqreturn_t (*ioq_intr_handler)(void *ioq_vector);
int (*soft_reset)(struct octep_device *oct);
void (*reinit_regs)(struct octep_device *oct);
@@ -73,7 +82,7 @@ struct octep_hw_ops {

void (*enable_interrupts)(struct octep_device *oct);
void (*disable_interrupts)(struct octep_device *oct);
- bool (*poll_non_ioq_interrupts)(struct octep_device *oct);
+ void (*poll_non_ioq_interrupts)(struct octep_device *oct);

void (*enable_io_queues)(struct octep_device *oct);
void (*disable_io_queues)(struct octep_device *oct);
--
2.25.1

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