diff options
author | Srikanth, Jampala <Jampala.Srikanth@cavium.com> | 2018-11-21 09:52:24 +0000 |
---|---|---|
committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-11-29 16:27:04 +0800 |
commit | 7a027b57f959660547779b6290a3b50ff1601980 (patch) | |
tree | fe6026826d4222488f657074e299f1638ff8de9b /drivers/crypto/cavium | |
parent | 4bede34c1aa19266628b13f68db95ec4a16a6f38 (diff) | |
download | linux-7a027b57f959660547779b6290a3b50ff1601980.tar.gz linux-7a027b57f959660547779b6290a3b50ff1601980.tar.bz2 linux-7a027b57f959660547779b6290a3b50ff1601980.zip |
crypto: cavium/nitrox - Enable interrups for PF in SR-IOV mode.
Enable the available interrupt vectors for PF in SR-IOV Mode.
Only single vector entry 192 is valid of PF. This is used to
notify any hardware errors and mailbox messages from VF(s).
Signed-off-by: Srikanth Jampala <Jampala.Srikanth@cavium.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/cavium')
-rw-r--r-- | drivers/crypto/cavium/nitrox/nitrox_dev.h | 15 | ||||
-rw-r--r-- | drivers/crypto/cavium/nitrox/nitrox_isr.c | 84 | ||||
-rw-r--r-- | drivers/crypto/cavium/nitrox/nitrox_isr.h | 2 | ||||
-rw-r--r-- | drivers/crypto/cavium/nitrox/nitrox_sriov.c | 51 |
4 files changed, 142 insertions, 10 deletions
diff --git a/drivers/crypto/cavium/nitrox/nitrox_dev.h b/drivers/crypto/cavium/nitrox/nitrox_dev.h index 283e252385fb..247df32f687c 100644 --- a/drivers/crypto/cavium/nitrox/nitrox_dev.h +++ b/drivers/crypto/cavium/nitrox/nitrox_dev.h @@ -103,6 +103,16 @@ struct nitrox_q_vector { }; }; +/** + * struct nitrox_iov - SR-IOV information + * @num_vfs: number of VF(s) enabled + * @msix: MSI-X for PF in SR-IOV case + */ +struct nitrox_iov { + int num_vfs; + struct msix_entry msix; +}; + /* * NITROX Device states */ @@ -150,6 +160,9 @@ enum vf_mode { * @ctx_pool: DMA pool for crypto context * @pkt_inq: Packet input rings * @qvec: MSI-X queue vectors information + * @iov: SR-IOV informatin + * @num_vecs: number of MSI-X vectors + * @stats: request statistics * @hw: hardware information * @debugfs_dir: debugfs directory */ @@ -168,13 +181,13 @@ struct nitrox_device { int node; u16 qlen; u16 nr_queues; - int num_vfs; enum vf_mode mode; struct dma_pool *ctx_pool; struct nitrox_cmdq *pkt_inq; struct nitrox_q_vector *qvec; + struct nitrox_iov iov; int num_vecs; struct nitrox_stats stats; diff --git a/drivers/crypto/cavium/nitrox/nitrox_isr.c b/drivers/crypto/cavium/nitrox/nitrox_isr.c index 88a77b8fb3fb..c5b797808680 100644 --- a/drivers/crypto/cavium/nitrox/nitrox_isr.c +++ b/drivers/crypto/cavium/nitrox/nitrox_isr.c @@ -13,6 +13,7 @@ * - NPS packet ring, AQMQ ring and ZQMQ ring */ #define NR_RING_VECTORS 3 +#define NR_NON_RING_VECTORS 1 /* base entry for packet ring/port */ #define PKT_RING_MSIX_BASE 0 #define NON_RING_MSIX_BASE 192 @@ -275,6 +276,7 @@ void nitrox_unregister_interrupts(struct nitrox_device *ndev) qvec->valid = false; } kfree(ndev->qvec); + ndev->qvec = NULL; pci_free_irq_vectors(pdev); } @@ -321,6 +323,7 @@ int nitrox_register_interrupts(struct nitrox_device *ndev) if (qvec->ring >= ndev->nr_queues) break; + qvec->cmdq = &ndev->pkt_inq[qvec->ring]; snprintf(qvec->name, IRQ_NAMESZ, "nitrox-pkt%d", qvec->ring); /* get the vector number */ vec = pci_irq_vector(pdev, i); @@ -335,13 +338,13 @@ int nitrox_register_interrupts(struct nitrox_device *ndev) tasklet_init(&qvec->resp_tasklet, pkt_slc_resp_tasklet, (unsigned long)qvec); - qvec->cmdq = &ndev->pkt_inq[qvec->ring]; qvec->valid = true; } /* request irqs for non ring vectors */ i = NON_RING_MSIX_BASE; qvec = &ndev->qvec[i]; + qvec->ndev = ndev; snprintf(qvec->name, IRQ_NAMESZ, "nitrox-core-int%d", i); /* get the vector number */ @@ -356,7 +359,6 @@ int nitrox_register_interrupts(struct nitrox_device *ndev) tasklet_init(&qvec->resp_tasklet, nps_core_int_tasklet, (unsigned long)qvec); - qvec->ndev = ndev; qvec->valid = true; return 0; @@ -365,3 +367,81 @@ irq_fail: nitrox_unregister_interrupts(ndev); return ret; } + +void nitrox_sriov_unregister_interrupts(struct nitrox_device *ndev) +{ + struct pci_dev *pdev = ndev->pdev; + int i; + + for (i = 0; i < ndev->num_vecs; i++) { + struct nitrox_q_vector *qvec; + int vec; + + qvec = ndev->qvec + i; + if (!qvec->valid) + continue; + + vec = ndev->iov.msix.vector; + irq_set_affinity_hint(vec, NULL); + free_irq(vec, qvec); + + tasklet_disable(&qvec->resp_tasklet); + tasklet_kill(&qvec->resp_tasklet); + qvec->valid = false; + } + kfree(ndev->qvec); + ndev->qvec = NULL; + pci_disable_msix(pdev); +} + +int nitrox_sriov_register_interupts(struct nitrox_device *ndev) +{ + struct pci_dev *pdev = ndev->pdev; + struct nitrox_q_vector *qvec; + int vec, cpu; + int ret; + + /** + * only non ring vectors i.e Entry 192 is available + * for PF in SR-IOV mode. + */ + ndev->iov.msix.entry = NON_RING_MSIX_BASE; + ret = pci_enable_msix_exact(pdev, &ndev->iov.msix, NR_NON_RING_VECTORS); + if (ret) { + dev_err(DEV(ndev), "failed to allocate nps-core-int%d\n", + NON_RING_MSIX_BASE); + return ret; + } + + qvec = kcalloc(NR_NON_RING_VECTORS, sizeof(*qvec), GFP_KERNEL); + if (!qvec) { + pci_disable_msix(pdev); + return -ENOMEM; + } + qvec->ndev = ndev; + + ndev->qvec = qvec; + ndev->num_vecs = NR_NON_RING_VECTORS; + snprintf(qvec->name, IRQ_NAMESZ, "nitrox-core-int%d", + NON_RING_MSIX_BASE); + + vec = ndev->iov.msix.vector; + ret = request_irq(vec, nps_core_int_isr, 0, qvec->name, qvec); + if (ret) { + dev_err(DEV(ndev), "irq failed for nitrox-core-int%d\n", + NON_RING_MSIX_BASE); + goto iov_irq_fail; + } + cpu = num_online_cpus(); + irq_set_affinity_hint(vec, get_cpu_mask(cpu)); + + tasklet_init(&qvec->resp_tasklet, nps_core_int_tasklet, + (unsigned long)qvec); + qvec->valid = true; + + return 0; + +iov_irq_fail: + nitrox_sriov_unregister_interrupts(ndev); + return ret; +} diff --git a/drivers/crypto/cavium/nitrox/nitrox_isr.h b/drivers/crypto/cavium/nitrox/nitrox_isr.h index 63418a6cc52c..1062c9336c1f 100644 --- a/drivers/crypto/cavium/nitrox/nitrox_isr.h +++ b/drivers/crypto/cavium/nitrox/nitrox_isr.h @@ -6,5 +6,7 @@ int nitrox_register_interrupts(struct nitrox_device *ndev); void nitrox_unregister_interrupts(struct nitrox_device *ndev); +int nitrox_sriov_register_interupts(struct nitrox_device *ndev); +void nitrox_sriov_unregister_interrupts(struct nitrox_device *ndev); #endif /* __NITROX_ISR_H */ diff --git a/drivers/crypto/cavium/nitrox/nitrox_sriov.c b/drivers/crypto/cavium/nitrox/nitrox_sriov.c index 30c0aa874583..7ba0cc5d6d02 100644 --- a/drivers/crypto/cavium/nitrox/nitrox_sriov.c +++ b/drivers/crypto/cavium/nitrox/nitrox_sriov.c @@ -7,6 +7,10 @@ #include "nitrox_common.h" #include "nitrox_isr.h" +/** + * num_vfs_valid - validate VF count + * @num_vfs: number of VF(s) + */ static inline bool num_vfs_valid(int num_vfs) { bool valid = false; @@ -48,7 +52,7 @@ static inline enum vf_mode num_vfs_to_mode(int num_vfs) return mode; } -static void pf_sriov_cleanup(struct nitrox_device *ndev) +static void nitrox_pf_cleanup(struct nitrox_device *ndev) { /* PF has no queues in SR-IOV mode */ atomic_set(&ndev->state, __NDEV_NOT_READY); @@ -60,7 +64,11 @@ static void pf_sriov_cleanup(struct nitrox_device *ndev) nitrox_common_sw_cleanup(ndev); } -static int pf_sriov_init(struct nitrox_device *ndev) +/** + * nitrox_pf_reinit - re-initialize PF resources once SR-IOV is disabled + * @ndev: NITROX device + */ +static int nitrox_pf_reinit(struct nitrox_device *ndev) { int err; @@ -86,6 +94,18 @@ static int pf_sriov_init(struct nitrox_device *ndev) return nitrox_crypto_register(); } +static int nitrox_sriov_init(struct nitrox_device *ndev) +{ + /* register interrupts for PF in SR-IOV */ + return nitrox_sriov_register_interupts(ndev); +} + +static void nitrox_sriov_cleanup(struct nitrox_device *ndev) +{ + /* unregister interrupts for PF in SR-IOV */ + nitrox_sriov_unregister_interrupts(ndev); +} + static int nitrox_sriov_enable(struct pci_dev *pdev, int num_vfs) { struct nitrox_device *ndev = pci_get_drvdata(pdev); @@ -106,17 +126,31 @@ static int nitrox_sriov_enable(struct pci_dev *pdev, int num_vfs) } dev_info(DEV(ndev), "Enabled VF(s) %d\n", num_vfs); - ndev->num_vfs = num_vfs; + ndev->iov.num_vfs = num_vfs; ndev->mode = num_vfs_to_mode(num_vfs); /* set bit in flags */ set_bit(__NDEV_SRIOV_BIT, &ndev->flags); /* cleanup PF resources */ - pf_sriov_cleanup(ndev); + nitrox_pf_cleanup(ndev); - config_nps_core_vfcfg_mode(ndev, ndev->mode); + /* PF SR-IOV mode initialization */ + err = nitrox_sriov_init(ndev); + if (err) + goto iov_fail; + config_nps_core_vfcfg_mode(ndev, ndev->mode); return num_vfs; + +iov_fail: + pci_disable_sriov(pdev); + /* clear bit in flags */ + clear_bit(__NDEV_SRIOV_BIT, &ndev->flags); + ndev->iov.num_vfs = 0; + ndev->mode = __NDEV_MODE_PF; + /* reset back to working mode in PF */ + nitrox_pf_reinit(ndev); + return err; } static int nitrox_sriov_disable(struct pci_dev *pdev) @@ -134,12 +168,15 @@ static int nitrox_sriov_disable(struct pci_dev *pdev) /* clear bit in flags */ clear_bit(__NDEV_SRIOV_BIT, &ndev->flags); - ndev->num_vfs = 0; + ndev->iov.num_vfs = 0; ndev->mode = __NDEV_MODE_PF; + /* cleanup PF SR-IOV resources */ + nitrox_sriov_cleanup(ndev); + config_nps_core_vfcfg_mode(ndev, ndev->mode); - return pf_sriov_init(ndev); + return nitrox_pf_reinit(ndev); } int nitrox_sriov_configure(struct pci_dev *pdev, int num_vfs) |