From 8e253882cd31e69527675202c9bdfab37f38231f Mon Sep 17 00:00:00 2001 From: Hemant Agrawal Date: Fri, 21 Sep 2018 16:35:55 +0530 Subject: [PATCH] bus/dpaa: support interrupt portal based fd This patch add supports in bus driver for qbman to support and configure portal based FDs, which can be used for interrupt based processing. Signed-off-by: Hemant Agrawal --- drivers/bus/dpaa/base/qbman/bman_driver.c | 17 +++++--- drivers/bus/dpaa/base/qbman/qman.c | 52 +++++++++++++++++++++++ drivers/bus/dpaa/base/qbman/qman_driver.c | 7 ++- drivers/bus/dpaa/include/fsl_qman.h | 20 +++++++++ drivers/bus/dpaa/include/fsl_usd.h | 6 +++ drivers/bus/dpaa/rte_bus_dpaa_version.map | 16 ++++++- 6 files changed, 110 insertions(+), 8 deletions(-) diff --git a/drivers/bus/dpaa/base/qbman/bman_driver.c b/drivers/bus/dpaa/base/qbman/bman_driver.c index b14b590529..750b756b93 100644 --- a/drivers/bus/dpaa/base/qbman/bman_driver.c +++ b/drivers/bus/dpaa/base/qbman/bman_driver.c @@ -23,7 +23,7 @@ static void *bman_ccsr_map; /* Portal driver */ /*****************/ -static __thread int fd = -1; +static __thread int bmfd = -1; static __thread struct bm_portal_config pcfg; static __thread struct dpaa_ioctl_portal_map map = { .type = dpaa_portal_bman @@ -70,14 +70,14 @@ static int fsl_bman_portal_init(uint32_t idx, int is_shared) pcfg.index = map.index; bman_depletion_fill(&pcfg.mask); - fd = open(BMAN_PORTAL_IRQ_PATH, O_RDONLY); - if (fd == -1) { + bmfd = open(BMAN_PORTAL_IRQ_PATH, O_RDONLY); + if (bmfd == -1) { pr_err("BMan irq init failed"); process_portal_unmap(&map.addr); return -EBUSY; } /* Use the IRQ FD as a unique IRQ number */ - pcfg.irq = fd; + pcfg.irq = bmfd; portal = bman_create_affine_portal(&pcfg); if (!portal) { @@ -90,7 +90,7 @@ static int fsl_bman_portal_init(uint32_t idx, int is_shared) /* Set the IRQ number */ irq_map.type = dpaa_portal_bman; irq_map.portal_cinh = map.addr.cinh; - process_portal_irq_map(fd, &irq_map); + process_portal_irq_map(bmfd, &irq_map); return 0; } @@ -99,7 +99,7 @@ static int fsl_bman_portal_finish(void) __maybe_unused const struct bm_portal_config *cfg; int ret; - process_portal_irq_unmap(fd); + process_portal_irq_unmap(bmfd); cfg = bman_destroy_affine_portal(); DPAA_BUG_ON(cfg != &pcfg); @@ -109,6 +109,11 @@ static int fsl_bman_portal_finish(void) return ret; } +int bman_thread_fd(void) +{ + return bmfd; +} + int bman_thread_init(void) { /* Convert from contiguous/virtual cpu numbering to real cpu when diff --git a/drivers/bus/dpaa/base/qbman/qman.c b/drivers/bus/dpaa/base/qbman/qman.c index 7c17027f2f..8730550258 100644 --- a/drivers/bus/dpaa/base/qbman/qman.c +++ b/drivers/bus/dpaa/base/qbman/qman.c @@ -1040,6 +1040,50 @@ static inline unsigned int __poll_portal_fast(struct qman_portal *p, return limit; } +int qman_irqsource_add(u32 bits) +{ + struct qman_portal *p = get_affine_portal(); + + bits = bits & QM_PIRQ_VISIBLE; + + /* Clear any previously remaining interrupt conditions in + * QCSP_ISR. This prevents raising a false interrupt when + * interrupt conditions are enabled in QCSP_IER. + */ + qm_isr_status_clear(&p->p, bits); + dpaa_set_bits(bits, &p->irq_sources); + qm_isr_enable_write(&p->p, p->irq_sources); + + + return 0; +} + +int qman_irqsource_remove(u32 bits) +{ + struct qman_portal *p = get_affine_portal(); + u32 ier; + + /* Our interrupt handler only processes+clears status register bits that + * are in p->irq_sources. As we're trimming that mask, if one of them + * were to assert in the status register just before we remove it from + * the enable register, there would be an interrupt-storm when we + * release the IRQ lock. So we wait for the enable register update to + * take effect in h/w (by reading it back) and then clear all other bits + * in the status register. Ie. we clear them from ISR once it's certain + * IER won't allow them to reassert. + */ + + bits &= QM_PIRQ_VISIBLE; + dpaa_clear_bits(bits, &p->irq_sources); + qm_isr_enable_write(&p->p, p->irq_sources); + ier = qm_isr_enable_read(&p->p); + /* Using "~ier" (rather than "bits" or "~p->irq_sources") creates a + * data-dependency, ie. to protect against re-ordering. + */ + qm_isr_status_clear(&p->p, ~ier); + return 0; +} + u16 qman_affine_channel(int cpu) { if (cpu < 0) { @@ -1114,6 +1158,14 @@ unsigned int qman_portal_poll_rx(unsigned int poll_limit, return rx_number; } +void qman_clear_irq(void) +{ + struct qman_portal *p = get_affine_portal(); + u32 clear = QM_DQAVAIL_MASK | (p->irq_sources & + ~(QM_PIRQ_CSCI | QM_PIRQ_CCSCI)); + qm_isr_status_clear(&p->p, clear); +} + u32 qman_portal_dequeue(struct rte_event ev[], unsigned int poll_limit, void **bufs) { diff --git a/drivers/bus/dpaa/base/qbman/qman_driver.c b/drivers/bus/dpaa/base/qbman/qman_driver.c index f6ecd6b286..ba153396d7 100644 --- a/drivers/bus/dpaa/base/qbman/qman_driver.c +++ b/drivers/bus/dpaa/base/qbman/qman_driver.c @@ -113,6 +113,11 @@ static int fsl_qman_portal_finish(void) return ret; } +int qman_thread_fd(void) +{ + return qmfd; +} + int qman_thread_init(void) { /* Convert from contiguous/virtual cpu numbering to real cpu when @@ -135,7 +140,7 @@ void qman_thread_irq(void) * rather than breaking that encapsulation I am simply hard-coding the * offset to the inhibit register here. */ - out_be32(qpcfg.addr_virt[DPAA_PORTAL_CI] + 0xe0c, 0); + out_be32(qpcfg.addr_virt[DPAA_PORTAL_CI] + 0x36C0, 0); } struct qman_portal *fsl_qman_portal_create(void) diff --git a/drivers/bus/dpaa/include/fsl_qman.h b/drivers/bus/dpaa/include/fsl_qman.h index b18cf03704..e438414994 100644 --- a/drivers/bus/dpaa/include/fsl_qman.h +++ b/drivers/bus/dpaa/include/fsl_qman.h @@ -1315,6 +1315,26 @@ int qman_get_portal_index(void); u32 qman_portal_dequeue(struct rte_event ev[], unsigned int poll_limit, void **bufs); +/** + * qman_irqsource_add - add processing sources to be interrupt-driven + * @bits: bitmask of QM_PIRQ_**I processing sources + * + * Adds processing sources that should be interrupt-driven (rather than + * processed via qman_poll_***() functions). Returns zero for success, or + * -EINVAL if the current CPU is sharing a portal hosted on another CPU. + */ +int qman_irqsource_add(u32 bits); + +/** + * qman_irqsource_remove - remove processing sources from being interrupt-driven + * @bits: bitmask of QM_PIRQ_**I processing sources + * + * Removes processing sources from being interrupt-driven, so that they will + * instead be processed via qman_poll_***() functions. Returns zero for success, + * or -EINVAL if the current CPU is sharing a portal hosted on another CPU. + */ +int qman_irqsource_remove(u32 bits); + /** * qman_affine_channel - return the channel ID of an portal * @cpu: the cpu whose affine portal is the subject of the query diff --git a/drivers/bus/dpaa/include/fsl_usd.h b/drivers/bus/dpaa/include/fsl_usd.h index e1836175f7..ec1ab7cee4 100644 --- a/drivers/bus/dpaa/include/fsl_usd.h +++ b/drivers/bus/dpaa/include/fsl_usd.h @@ -55,6 +55,10 @@ int qman_free_raw_portal(struct dpaa_raw_portal *portal); int bman_allocate_raw_portal(struct dpaa_raw_portal *portal); int bman_free_raw_portal(struct dpaa_raw_portal *portal); +/* Obtain thread-local UIO file-descriptors */ +int qman_thread_fd(void); +int bman_thread_fd(void); + /* Post-process interrupts. NB, the kernel IRQ handler disables the interrupt * line before notifying us, and this post-processing re-enables it once * processing is complete. As such, it is essential to call this before going @@ -63,6 +67,8 @@ int bman_free_raw_portal(struct dpaa_raw_portal *portal); void qman_thread_irq(void); void bman_thread_irq(void); +void qman_clear_irq(void); + /* Global setup */ int qman_global_init(void); int bman_global_init(void); diff --git a/drivers/bus/dpaa/rte_bus_dpaa_version.map b/drivers/bus/dpaa/rte_bus_dpaa_version.map index 7d6d6243ff..70076c7acf 100644 --- a/drivers/bus/dpaa/rte_bus_dpaa_version.map +++ b/drivers/bus/dpaa/rte_bus_dpaa_version.map @@ -95,10 +95,24 @@ DPDK_18.02 { DPDK_18.08 { global: - fman_if_get_sg_enable; fman_if_set_sg; of_get_mac_address; local: *; } DPDK_18.02; + +DPDK_18.11 { + global: + bman_thread_irq; + fman_if_get_sg_enable; + fman_if_set_sg; + qman_clear_irq; + + qman_irqsource_add; + qman_irqsource_remove; + qman_thread_fd; + qman_thread_irq; + + local: *; +} DPDK_18.08; -- 2.20.1