Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 468 insertions, 0 deletions

diff --git a/drivers/crypto/cavium/nitrox/nitrox_isr.c b/drivers/crypto/cavium/nitrox/nitrox_isr.c
new file mode 100644
index 000000000..ee0d70ba2
--- /dev/null
+++ b/drivers/crypto/cavium/nitrox/nitrox_isr.c
@@ -0,0 +1,468 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/pci.h>
+#include <linux/printk.h>
+#include <linux/slab.h>
+
+#include "nitrox_dev.h"
+#include "nitrox_csr.h"
+#include "nitrox_common.h"
+
+#define NR_RING_VECTORS 3
+#define NPS_CORE_INT_ACTIVE_ENTRY 192
+
+/**
+ * nps_pkt_slc_isr - IRQ handler for NPS solicit port
+ * @irq: irq number
+ * @data: argument
+ */
+static irqreturn_t nps_pkt_slc_isr(int irq, void *data)
+{
+	struct bh_data *slc = data;
+	union nps_pkt_slc_cnts pkt_slc_cnts;
+
+	pkt_slc_cnts.value = readq(slc->completion_cnt_csr_addr);
+	/* New packet on SLC output port */
+	if (pkt_slc_cnts.s.slc_int)
+		tasklet_hi_schedule(&slc->resp_handler);
+
+	return IRQ_HANDLED;
+}
+
+static void clear_nps_core_err_intr(struct nitrox_device *ndev)
+{
+	u64 value;
+
+	/* Write 1 to clear */
+	value = nitrox_read_csr(ndev, NPS_CORE_INT);
+	nitrox_write_csr(ndev, NPS_CORE_INT, value);
+
+	dev_err_ratelimited(DEV(ndev), "NSP_CORE_INT  0x%016llx\n", value);
+}
+
+static void clear_nps_pkt_err_intr(struct nitrox_device *ndev)
+{
+	union nps_pkt_int pkt_int;
+	unsigned long value, offset;
+	int i;
+
+	pkt_int.value = nitrox_read_csr(ndev, NPS_PKT_INT);
+	dev_err_ratelimited(DEV(ndev), "NPS_PKT_INT  0x%016llx\n",
+			    pkt_int.value);
+
+	if (pkt_int.s.slc_err) {
+		offset = NPS_PKT_SLC_ERR_TYPE;
+		value = nitrox_read_csr(ndev, offset);
+		nitrox_write_csr(ndev, offset, value);
+		dev_err_ratelimited(DEV(ndev),
+				    "NPS_PKT_SLC_ERR_TYPE  0x%016lx\n", value);
+
+		offset = NPS_PKT_SLC_RERR_LO;
+		value = nitrox_read_csr(ndev, offset);
+		nitrox_write_csr(ndev, offset, value);
+		/* enable the solicit ports */
+		for_each_set_bit(i, &value, BITS_PER_LONG)
+			enable_pkt_solicit_port(ndev, i);
+
+		dev_err_ratelimited(DEV(ndev),
+				    "NPS_PKT_SLC_RERR_LO  0x%016lx\n", value);
+
+		offset = NPS_PKT_SLC_RERR_HI;
+		value = nitrox_read_csr(ndev, offset);
+		nitrox_write_csr(ndev, offset, value);
+		dev_err_ratelimited(DEV(ndev),
+				    "NPS_PKT_SLC_RERR_HI  0x%016lx\n", value);
+	}
+
+	if (pkt_int.s.in_err) {
+		offset = NPS_PKT_IN_ERR_TYPE;
+		value = nitrox_read_csr(ndev, offset);
+		nitrox_write_csr(ndev, offset, value);
+		dev_err_ratelimited(DEV(ndev),
+				    "NPS_PKT_IN_ERR_TYPE  0x%016lx\n", value);
+		offset = NPS_PKT_IN_RERR_LO;
+		value = nitrox_read_csr(ndev, offset);
+		nitrox_write_csr(ndev, offset, value);
+		/* enable the input ring */
+		for_each_set_bit(i, &value, BITS_PER_LONG)
+			enable_pkt_input_ring(ndev, i);
+
+		dev_err_ratelimited(DEV(ndev),
+				    "NPS_PKT_IN_RERR_LO  0x%016lx\n", value);
+
+		offset = NPS_PKT_IN_RERR_HI;
+		value = nitrox_read_csr(ndev, offset);
+		nitrox_write_csr(ndev, offset, value);
+		dev_err_ratelimited(DEV(ndev),
+				    "NPS_PKT_IN_RERR_HI  0x%016lx\n", value);
+	}
+}
+
+static void clear_pom_err_intr(struct nitrox_device *ndev)
+{
+	u64 value;
+
+	value = nitrox_read_csr(ndev, POM_INT);
+	nitrox_write_csr(ndev, POM_INT, value);
+	dev_err_ratelimited(DEV(ndev), "POM_INT  0x%016llx\n", value);
+}
+
+static void clear_pem_err_intr(struct nitrox_device *ndev)
+{
+	u64 value;
+
+	value = nitrox_read_csr(ndev, PEM0_INT);
+	nitrox_write_csr(ndev, PEM0_INT, value);
+	dev_err_ratelimited(DEV(ndev), "PEM(0)_INT  0x%016llx\n", value);
+}
+
+static void clear_lbc_err_intr(struct nitrox_device *ndev)
+{
+	union lbc_int lbc_int;
+	u64 value, offset;
+	int i;
+
+	lbc_int.value = nitrox_read_csr(ndev, LBC_INT);
+	dev_err_ratelimited(DEV(ndev), "LBC_INT  0x%016llx\n", lbc_int.value);
+
+	if (lbc_int.s.dma_rd_err) {
+		for (i = 0; i < NR_CLUSTERS; i++) {
+			offset = EFL_CORE_VF_ERR_INT0X(i);
+			value = nitrox_read_csr(ndev, offset);
+			nitrox_write_csr(ndev, offset, value);
+			offset = EFL_CORE_VF_ERR_INT1X(i);
+			value = nitrox_read_csr(ndev, offset);
+			nitrox_write_csr(ndev, offset, value);
+		}
+	}
+
+	if (lbc_int.s.cam_soft_err) {
+		dev_err_ratelimited(DEV(ndev), "CAM_SOFT_ERR, invalidating LBC\n");
+		invalidate_lbc(ndev);
+	}
+
+	if (lbc_int.s.pref_dat_len_mismatch_err) {
+		offset = LBC_PLM_VF1_64_INT;
+		value = nitrox_read_csr(ndev, offset);
+		nitrox_write_csr(ndev, offset, value);
+		offset = LBC_PLM_VF65_128_INT;
+		value = nitrox_read_csr(ndev, offset);
+		nitrox_write_csr(ndev, offset, value);
+	}
+
+	if (lbc_int.s.rd_dat_len_mismatch_err) {
+		offset = LBC_ELM_VF1_64_INT;
+		value = nitrox_read_csr(ndev, offset);
+		nitrox_write_csr(ndev, offset, value);
+		offset = LBC_ELM_VF65_128_INT;
+		value = nitrox_read_csr(ndev, offset);
+		nitrox_write_csr(ndev, offset, value);
+	}
+	nitrox_write_csr(ndev, LBC_INT, lbc_int.value);
+}
+
+static void clear_efl_err_intr(struct nitrox_device *ndev)
+{
+	int i;
+
+	for (i = 0; i < NR_CLUSTERS; i++) {
+		union efl_core_int core_int;
+		u64 value, offset;
+
+		offset = EFL_CORE_INTX(i);
+		core_int.value = nitrox_read_csr(ndev, offset);
+		nitrox_write_csr(ndev, offset, core_int.value);
+		dev_err_ratelimited(DEV(ndev), "ELF_CORE(%d)_INT  0x%016llx\n",
+				    i, core_int.value);
+		if (core_int.s.se_err) {
+			offset = EFL_CORE_SE_ERR_INTX(i);
+			value = nitrox_read_csr(ndev, offset);
+			nitrox_write_csr(ndev, offset, value);
+		}
+	}
+}
+
+static void clear_bmi_err_intr(struct nitrox_device *ndev)
+{
+	u64 value;
+
+	value = nitrox_read_csr(ndev, BMI_INT);
+	nitrox_write_csr(ndev, BMI_INT, value);
+	dev_err_ratelimited(DEV(ndev), "BMI_INT  0x%016llx\n", value);
+}
+
+/**
+ * clear_nps_core_int_active - clear NPS_CORE_INT_ACTIVE interrupts
+ * @ndev: NITROX device
+ */
+static void clear_nps_core_int_active(struct nitrox_device *ndev)
+{
+	union nps_core_int_active core_int_active;
+
+	core_int_active.value = nitrox_read_csr(ndev, NPS_CORE_INT_ACTIVE);
+
+	if (core_int_active.s.nps_core)
+		clear_nps_core_err_intr(ndev);
+
+	if (core_int_active.s.nps_pkt)
+		clear_nps_pkt_err_intr(ndev);
+
+	if (core_int_active.s.pom)
+		clear_pom_err_intr(ndev);
+
+	if (core_int_active.s.pem)
+		clear_pem_err_intr(ndev);
+
+	if (core_int_active.s.lbc)
+		clear_lbc_err_intr(ndev);
+
+	if (core_int_active.s.efl)
+		clear_efl_err_intr(ndev);
+
+	if (core_int_active.s.bmi)
+		clear_bmi_err_intr(ndev);
+
+	/* If more work callback the ISR, set resend */
+	core_int_active.s.resend = 1;
+	nitrox_write_csr(ndev, NPS_CORE_INT_ACTIVE, core_int_active.value);
+}
+
+static irqreturn_t nps_core_int_isr(int irq, void *data)
+{
+	struct nitrox_device *ndev = data;
+
+	clear_nps_core_int_active(ndev);
+
+	return IRQ_HANDLED;
+}
+
+static int nitrox_enable_msix(struct nitrox_device *ndev)
+{
+	struct msix_entry *entries;
+	char **names;
+	int i, nr_entries, ret;
+
+	/*
+	 * PF MSI-X vectors
+	 *
+	 * Entry 0: NPS PKT ring 0
+	 * Entry 1: AQMQ ring 0
+	 * Entry 2: ZQM ring 0
+	 * Entry 3: NPS PKT ring 1
+	 * Entry 4: AQMQ ring 1
+	 * Entry 5: ZQM ring 1
+	 * ....
+	 * Entry 192: NPS_CORE_INT_ACTIVE
+	 */
+	nr_entries = (ndev->nr_queues * NR_RING_VECTORS) + 1;
+	entries = kcalloc_node(nr_entries, sizeof(struct msix_entry),
+			       GFP_KERNEL, ndev->node);
+	if (!entries)
+		return -ENOMEM;
+
+	names = kcalloc(nr_entries, sizeof(char *), GFP_KERNEL);
+	if (!names) {
+		kfree(entries);
+		return -ENOMEM;
+	}
+
+	/* fill entires */
+	for (i = 0; i < (nr_entries - 1); i++)
+		entries[i].entry = i;
+
+	entries[i].entry = NPS_CORE_INT_ACTIVE_ENTRY;
+
+	for (i = 0; i < nr_entries; i++) {
+		*(names + i) = kzalloc(MAX_MSIX_VECTOR_NAME, GFP_KERNEL);
+		if (!(*(names + i))) {
+			ret = -ENOMEM;
+			goto msix_fail;
+		}
+	}
+	ndev->msix.entries = entries;
+	ndev->msix.names = names;
+	ndev->msix.nr_entries = nr_entries;
+
+	ret = pci_enable_msix_exact(ndev->pdev, ndev->msix.entries,
+				    ndev->msix.nr_entries);
+	if (ret) {
+		dev_err(&ndev->pdev->dev, "Failed to enable MSI-X IRQ(s) %d\n",
+			ret);
+		goto msix_fail;
+	}
+	return 0;
+
+msix_fail:
+	for (i = 0; i < nr_entries; i++)
+		kfree(*(names + i));
+
+	kfree(entries);
+	kfree(names);
+	return ret;
+}
+
+static void nitrox_cleanup_pkt_slc_bh(struct nitrox_device *ndev)
+{
+	int i;
+
+	if (!ndev->bh.slc)
+		return;
+
+	for (i = 0; i < ndev->nr_queues; i++) {
+		struct bh_data *bh = &ndev->bh.slc[i];
+
+		tasklet_disable(&bh->resp_handler);
+		tasklet_kill(&bh->resp_handler);
+	}
+	kfree(ndev->bh.slc);
+	ndev->bh.slc = NULL;
+}
+
+static int nitrox_setup_pkt_slc_bh(struct nitrox_device *ndev)
+{
+	u32 size;
+	int i;
+
+	size = ndev->nr_queues * sizeof(struct bh_data);
+	ndev->bh.slc = kzalloc(size, GFP_KERNEL);
+	if (!ndev->bh.slc)
+		return -ENOMEM;
+
+	for (i = 0; i < ndev->nr_queues; i++) {
+		struct bh_data *bh = &ndev->bh.slc[i];
+		u64 offset;
+
+		offset = NPS_PKT_SLC_CNTSX(i);
+		/* pre calculate completion count address */
+		bh->completion_cnt_csr_addr = NITROX_CSR_ADDR(ndev, offset);
+		bh->cmdq = &ndev->pkt_cmdqs[i];
+
+		tasklet_init(&bh->resp_handler, pkt_slc_resp_handler,
+			     (unsigned long)bh);
+	}
+
+	return 0;
+}
+
+static int nitrox_request_irqs(struct nitrox_device *ndev)
+{
+	struct pci_dev *pdev = ndev->pdev;
+	struct msix_entry *msix_ent = ndev->msix.entries;
+	int nr_ring_vectors, i = 0, ring, cpu, ret;
+	char *name;
+
+	/*
+	 * PF MSI-X vectors
+	 *
+	 * Entry 0: NPS PKT ring 0
+	 * Entry 1: AQMQ ring 0
+	 * Entry 2: ZQM ring 0
+	 * Entry 3: NPS PKT ring 1
+	 * ....
+	 * Entry 192: NPS_CORE_INT_ACTIVE
+	 */
+	nr_ring_vectors = ndev->nr_queues * NR_RING_VECTORS;
+
+	/* request irq for pkt ring/ports only */
+	while (i < nr_ring_vectors) {
+		name = *(ndev->msix.names + i);
+		ring = (i / NR_RING_VECTORS);
+		snprintf(name, MAX_MSIX_VECTOR_NAME, "n5(%d)-slc-ring%d",
+			 ndev->idx, ring);
+
+		ret = request_irq(msix_ent[i].vector, nps_pkt_slc_isr, 0,
+				  name, &ndev->bh.slc[ring]);
+		if (ret) {
+			dev_err(&pdev->dev, "failed to get irq %d for %s\n",
+				msix_ent[i].vector, name);
+			return ret;
+		}
+		cpu = ring % num_online_cpus();
+		irq_set_affinity_hint(msix_ent[i].vector, get_cpu_mask(cpu));
+
+		set_bit(i, ndev->msix.irqs);
+		i += NR_RING_VECTORS;
+	}
+
+	/* Request IRQ for NPS_CORE_INT_ACTIVE */
+	name = *(ndev->msix.names + i);
+	snprintf(name, MAX_MSIX_VECTOR_NAME, "n5(%d)-nps-core-int", ndev->idx);
+	ret = request_irq(msix_ent[i].vector, nps_core_int_isr, 0, name, ndev);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to get irq %d for %s\n",
+			msix_ent[i].vector, name);
+		return ret;
+	}
+	set_bit(i, ndev->msix.irqs);
+
+	return 0;
+}
+
+static void nitrox_disable_msix(struct nitrox_device *ndev)
+{
+	struct msix_entry *msix_ent = ndev->msix.entries;
+	char **names = ndev->msix.names;
+	int i = 0, ring, nr_ring_vectors;
+
+	nr_ring_vectors = ndev->msix.nr_entries - 1;
+
+	/* clear pkt ring irqs */
+	while (i < nr_ring_vectors) {
+		if (test_and_clear_bit(i, ndev->msix.irqs)) {
+			ring = (i / NR_RING_VECTORS);
+			irq_set_affinity_hint(msix_ent[i].vector, NULL);
+			free_irq(msix_ent[i].vector, &ndev->bh.slc[ring]);
+		}
+		i += NR_RING_VECTORS;
+	}
+	irq_set_affinity_hint(msix_ent[i].vector, NULL);
+	free_irq(msix_ent[i].vector, ndev);
+	clear_bit(i, ndev->msix.irqs);
+
+	kfree(ndev->msix.entries);
+	for (i = 0; i < ndev->msix.nr_entries; i++)
+		kfree(*(names + i));
+
+	kfree(names);
+	pci_disable_msix(ndev->pdev);
+}
+
+/**
+ * nitrox_pf_cleanup_isr: Cleanup PF MSI-X and IRQ
+ * @ndev: NITROX device
+ */
+void nitrox_pf_cleanup_isr(struct nitrox_device *ndev)
+{
+	nitrox_disable_msix(ndev);
+	nitrox_cleanup_pkt_slc_bh(ndev);
+}
+
+/**
+ * nitrox_init_isr - Initialize PF MSI-X vectors and IRQ
+ * @ndev: NITROX device
+ *
+ * Return: 0 on success, a negative value on failure.
+ */
+int nitrox_pf_init_isr(struct nitrox_device *ndev)
+{
+	int err;
+
+	err = nitrox_setup_pkt_slc_bh(ndev);
+	if (err)
+		return err;
+
+	err = nitrox_enable_msix(ndev);
+	if (err)
+		goto msix_fail;
+
+	err = nitrox_request_irqs(ndev);
+	if (err)
+		goto irq_fail;
+
+	return 0;
+
+irq_fail:
+	nitrox_disable_msix(ndev);
+msix_fail:
+	nitrox_cleanup_pkt_slc_bh(ndev);
+	return err;
+}