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[68.147.8.254]) by smtp.gmail.com with ESMTPSA id y200sm16032316pfb.33.2020.07.27.15.59.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Jul 2020 15:59:54 -0700 (PDT) Date: Mon, 27 Jul 2020 16:59:52 -0600 From: Mathieu Poirier To: Ben Levinsky Cc: ohad@wizery.com, bjorn.andersson@linaro.org, michals@xilinx.com, JOLLYS@xilinx.com, RAJANV@xilinx.com, robh+dt@kernel.org, mark.rutland@arm.com, linux-remoteproc@vger.kernel.org, linux-arm-kernell@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, jliang@xilinx.com, stefanos@xilinx.com, Wendy Liang , Michal Simek , Ed Mooring , Jason Wu Subject: Re: [PATCH v6 5/5] remoteproc: Add initial zynqmp R5 remoteproc driver Message-ID: <20200727225952.GA2389399@xps15> References: <20200715153317.25643-1-ben.levinsky@xilinx.com> <20200715153317.25643-6-ben.levinsky@xilinx.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200715153317.25643-6-ben.levinsky@xilinx.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jul 15, 2020 at 08:33:17AM -0700, Ben Levinsky wrote: > R5 is included in Xilinx Zynq UltraScale MPSoC so by adding this > remotproc driver, we can boot the R5 sub-system in different > configurations. > > Acked-by: Stefano Stabellini > Acked-by: Ben Levinsky > Reviewed-by: Radhey Shyam Pandey > Signed-off-by: Ben Levinsky > Signed-off-by: Wendy Liang > Signed-off-by: Michal Simek > Signed-off-by: Ed Mooring > Signed-off-by: Jason Wu > Tested-by: Ben Levinsky > --- > v2: > - remove domain struct as per review from Mathieu > v3: > - add xilinx-related platform mgmt fn's instead of wrapping around > function pointer in xilinx eemi ops struct > v4: > - add default values for enums > - fix formatting as per checkpatch.pl --strict. Note that 1 warning and 1 check > are still raised as each is due to fixing the warning results in that > particular line going over 80 characters. > v5: > - parse_fw change from use of rproc_of_resm_mem_entry_init to rproc_mem_entry_init and use of alloc/release > - var's of type zynqmp_r5_pdata all have same local variable name > - use dev_dbg instead of dev_info > v6: > - adding memory carveouts is handled much more similarly. All mem carveouts are > now described in reserved memory as needed. That is, TCM nodes are not > coupled to remoteproc anymore. This is reflected in the remoteproc R5 driver > and the device tree binding. > - remove mailbox from device tree binding as it is not necessary for elf > loading > - use lockstep-mode property for configuring RPU > --- > drivers/remoteproc/Kconfig | 10 + > drivers/remoteproc/Makefile | 1 + > drivers/remoteproc/zynqmp_r5_remoteproc.c | 911 ++++++++++++++++++++++ > 3 files changed, 922 insertions(+) > create mode 100644 drivers/remoteproc/zynqmp_r5_remoteproc.c > > diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig > index c4d1731295eb..342a7e668636 100644 > --- a/drivers/remoteproc/Kconfig > +++ b/drivers/remoteproc/Kconfig > @@ -249,6 +249,16 @@ config STM32_RPROC > > This can be either built-in or a loadable module. > > +config ZYNQMP_R5_REMOTEPROC > + tristate "ZynqMP_R5 remoteproc support" > + depends on ARM64 && PM && ARCH_ZYNQMP > + select RPMSG_VIRTIO > + select MAILBOX > + select ZYNQMP_IPI_MBOX > + help > + Say y here to support ZynqMP R5 remote processors via the remote > + processor framework. > + > endif # REMOTEPROC > > endmenu > diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile > index e8b886e511f0..04d1c95d06d7 100644 > --- a/drivers/remoteproc/Makefile > +++ b/drivers/remoteproc/Makefile > @@ -28,5 +28,6 @@ obj-$(CONFIG_QCOM_WCNSS_PIL) += qcom_wcnss_pil.o > qcom_wcnss_pil-y += qcom_wcnss.o > qcom_wcnss_pil-y += qcom_wcnss_iris.o > obj-$(CONFIG_ST_REMOTEPROC) += st_remoteproc.o > +obj-$(CONFIG_ZYNQMP_R5_REMOTEPROC) += zynqmp_r5_remoteproc.o > obj-$(CONFIG_ST_SLIM_REMOTEPROC) += st_slim_rproc.o > obj-$(CONFIG_STM32_RPROC) += stm32_rproc.o > diff --git a/drivers/remoteproc/zynqmp_r5_remoteproc.c b/drivers/remoteproc/zynqmp_r5_remoteproc.c > new file mode 100644 > index 000000000000..b600759e257e > --- /dev/null > +++ b/drivers/remoteproc/zynqmp_r5_remoteproc.c > @@ -0,0 +1,911 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Zynq R5 Remote Processor driver > + * > + * Copyright (C) 2019, 2020 Xilinx Inc. Ben Levinsky > + * Copyright (C) 2015 - 2018 Xilinx Inc. > + * Copyright (C) 2015 Jason Wu > + * > + * Based on origin OMAP and Zynq Remote Processor driver > + * > + * Copyright (C) 2012 Michal Simek > + * Copyright (C) 2012 PetaLogix > + * Copyright (C) 2011 Texas Instruments, Inc. > + * Copyright (C) 2011 Google, Inc. > + */ > + > +#include Unused > +#include > +#include > +#include Unused > +#include > +#include > +#include Unused > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include Unused > +#include > +#include > +#include > +#include > +#include > + > +#include "remoteproc_internal.h" > + > +#define MAX_RPROCS 2 /* Support up to 2 RPU */ > +#define MAX_MEM_PNODES 4 /* Max power nodes for one RPU memory instance */ > + > +#define DEFAULT_FIRMWARE_NAME "rproc-rpu-fw" > + > +/* PM proc states */ > +#define PM_PROC_STATE_ACTIVE 1U Unused > + > +/* IPI buffer MAX length */ > +#define IPI_BUF_LEN_MAX 32U > +/* RX mailbox client buffer max length */ > +#define RX_MBOX_CLIENT_BUF_MAX (IPI_BUF_LEN_MAX + \ > + sizeof(struct zynqmp_ipi_message)) > + > +#define ZYNQMP_R5_NUM_TCM_BANKS 4 > + > +/* lookup table mapping power-node-ID of TCM bank to absolute base address */ > +static unsigned long tcm_addr_to_pnode[ZYNQMP_R5_NUM_TCM_BANKS][2] = { > + {0xFFE00000, 0xF }, > + {0xFFE20000, 0x10}, > + {0xFFE90000, 0x10}, > + {0xFFEB0000, 0x11}, > +}; > + > +static bool autoboot __read_mostly; > + > +/** > + * struct zynqmp_r5_mem - zynqmp rpu memory data > + * @pnode_id: TCM power domain ids > + * @res: memory resource > + * @node: list node > + */ > +struct zynqmp_r5_mem { > + u32 pnode_id[MAX_MEM_PNODES]; > + struct resource res; > + struct list_head node; > +}; > + > +/** > + * struct zynqmp_r5_pdata - zynqmp rpu remote processor private data > + * @dev: device of RPU instance > + * @rproc: rproc handle > + * @pnode_id: RPU CPU power domain id > + * @mems: memory resources > + * @is_r5_mode_set: indicate if r5 operation mode is set > + * @tx_mc: tx mailbox client > + * @rx_mc: rx mailbox client > + * @tx_chan: tx mailbox channel > + * @rx_chan: rx mailbox channel > + * @mbox_work: mbox_work for the RPU remoteproc > + * @tx_mc_skbs: socket buffers for tx mailbox client > + * @rx_mc_buf: rx mailbox client buffer to save the rx message > + */ > +struct zynqmp_r5_pdata { > + struct device dev; > + struct rproc *rproc; > + u32 pnode_id; > + struct list_head mems; > + bool is_r5_mode_set; > + struct mbox_client tx_mc; > + struct mbox_client rx_mc; > + struct mbox_chan *tx_chan; > + struct mbox_chan *rx_chan; > + struct work_struct mbox_work; > + struct sk_buff_head tx_mc_skbs; > + unsigned char rx_mc_buf[RX_MBOX_CLIENT_BUF_MAX]; > +}; > + > +/** > + * table of RPUs > + */ > +struct zynqmp_r5_pdata rpus[MAX_RPROCS]; > +/** > + * RPU core configuration > + */ > +enum rpu_oper_mode rpu_mode; > + > +/* > + * r5_set_mode - set RPU operation mode > + * @pdata: Remote processor private data > + * > + * set RPU oepration mode > + * > + * Return: 0 for success, negative value for failure > + */ > +static int r5_set_mode(struct zynqmp_r5_pdata *pdata) > +{ > + u32 val[PAYLOAD_ARG_CNT] = {0}, expect, tcm_mode; > + struct device *dev = &pdata->dev; > + int ret; > + > + expect = (u32)rpu_mode; > + ret = zynqmp_pm_get_rpu_mode(pdata->pnode_id, 0, 0, val); > + if (ret < 0) { > + dev_err(dev, "failed to get RPU oper mode.\n"); > + return ret; > + } > + if (val[0] == expect) { > + dev_dbg(dev, "RPU mode matches: %x\n", val[0]); > + } else { > + ret = zynqmp_pm_set_rpu_mode(pdata->pnode_id, > + expect, 0, val); > + if (ret < 0) { > + dev_err(dev, > + "failed to set RPU oper mode.\n"); > + return ret; > + } > + } > + > + tcm_mode = (expect == (u32)PM_RPU_MODE_LOCKSTEP) ? > + PM_RPU_TCM_COMB : PM_RPU_TCM_SPLIT; > + ret = zynqmp_pm_set_tcm_config(pdata->pnode_id, tcm_mode, 0, val); > + if (ret < 0) { > + dev_err(dev, "failed to config TCM to %x.\n", > + expect); > + return ret; > + } > + pdata->is_r5_mode_set = true; > + return 0; > +} > + > +/* > + * ZynqMP R5 remoteproc memory release function > + */ > +static int zynqmp_r5_mem_release(struct rproc *rproc, > + struct rproc_mem_entry *mem) > +{ > + struct zynqmp_r5_mem *priv; > + int i, ret; > + struct device *dev = &rproc->dev; > + > + priv = mem->priv; > + if (!priv) > + return 0; > + for (i = 0; i < MAX_MEM_PNODES; i++) { > + if (priv->pnode_id[i]) { > + dev_dbg(dev, "%s, pnode %d\n", > + __func__, priv->pnode_id[i]); > + ret = zynqmp_pm_release_node(priv->pnode_id[i]); > + if (ret < 0) { > + dev_err(dev, > + "failed to release power node: %u\n", > + priv->pnode_id[i]); > + return ret; > + } > + } else { > + break; > + } > + } > + return 0; > +} > + > +/* > + * ZynqMP R5 remoteproc operations > + */ > +static int zynqmp_r5_rproc_start(struct rproc *rproc) > +{ > + struct device *dev = rproc->dev.parent; > + struct zynqmp_r5_pdata *pdata = rproc->priv; > + enum rpu_boot_mem bootmem; > + int ret; > + > + if ((rproc->bootaddr & 0xF0000000) == 0xF0000000) > + bootmem = PM_RPU_BOOTMEM_HIVEC; > + else > + bootmem = PM_RPU_BOOTMEM_LOVEC; > + dev_dbg(dev, "RPU boot from %s.", > + bootmem == PM_RPU_BOOTMEM_HIVEC ? "OCM" : "TCM"); > + ret = zynqmp_pm_request_wakeup(pdata->pnode_id, 1, > + bootmem, ZYNQMP_PM_REQUEST_ACK_NO); > + if (ret < 0) { > + dev_err(dev, "failed to boot R5.\n"); > + return ret; > + } > + return 0; > +} > + > +static int zynqmp_r5_rproc_stop(struct rproc *rproc) > +{ > + struct zynqmp_r5_pdata *pdata = rproc->priv; > + int ret; > + > + ret = zynqmp_pm_force_powerdown(pdata->pnode_id, > + ZYNQMP_PM_REQUEST_ACK_BLOCKING); > + if (ret < 0) { > + dev_err(&pdata->dev, "failed to shutdown R5.\n"); > + return ret; > + } > + return 0; > +} > + > +static int zynqmp_r5_rproc_mem_alloc(struct rproc *rproc, > + struct rproc_mem_entry *mem) > +{ > + struct device *dev = rproc->dev.parent; > + void *va; > + > + dev_dbg(rproc->dev.parent, "map memory: %pa\n", &mem->dma); > + va = ioremap_wc(mem->dma, mem->len); > + if (IS_ERR_OR_NULL(va)) { > + dev_err(dev, "Unable to map memory region: %pa+%lx\n", > + &mem->dma, mem->len); > + return -ENOMEM; > + } > + > + /* Update memory entry va */ > + mem->va = va; > + > + return 0; > +} > + > +static int zynqmp_r5_rproc_mem_release(struct rproc *rproc, > + struct rproc_mem_entry *mem) > +{ > + dev_dbg(rproc->dev.parent, "unmap memory: %pa\n", &mem->dma); > + iounmap(mem->va); > + > + return 0; > +} > + > +/* > + * TCM needs mapping to R5 relative address and xilinx platform mgmt call > + */ > +struct rproc_mem_entry *handle_tcm_parsing(struct device *dev, > + struct reserved_mem *rmem, > + struct device_node *node, > + int lookup_idx) > +{ > + void *va; > + dma_addr_t dma; > + resource_size_t size; > + int ret; > + u32 pnode_id; > + struct resource rsc; > + struct rproc_mem_entry *mem; > + > + pnode_id = tcm_addr_to_pnode[lookup_idx][1]; > + ret = zynqmp_pm_request_node(pnode_id, > + ZYNQMP_PM_CAPABILITY_ACCESS, 0, > + ZYNQMP_PM_REQUEST_ACK_BLOCKING); > + if (ret < 0) { > + dev_err(dev, "failed to request power node: %u\n", pnode_id); > + return -EINVAL; > + } > + > + ret = of_address_to_resource(node, 0, &rsc); > + if (ret < 0) { > + dev_err(dev, "failed to get resource of memory %s", > + of_node_full_name(node)); > + return -EINVAL; > + } > + size = resource_size(&rsc); > + va = devm_ioremap_wc(dev, rsc.start, size); > + if (!va) > + return -ENOMEM; > + > + /* zero out tcm base address */ > + if (rsc.start & 0xffe00000) { > + /* R5 can't see anything past 0xfffff so wipe it */ > + rsc.start &= 0x000fffff; > + /* > + * handle tcm banks 1 a and b (0xffe9000 and > + * 0xffeb0000) > + */ > + if (rsc.start & 0x80000) > + rsc.start -= 0x90000; > + } > + > + dma = (dma_addr_t)rsc.start; > + mem = rproc_mem_entry_init(dev, va, dma, (int)size, rsc.start, > + NULL, zynqmp_r5_mem_release, > + rsc.name); > + if (!mem) > + return -ENOMEM; > + > + return mem; > +} > + > +static int parse_mem_regions(struct rproc *rproc) > +{ > + int num_mems, i; > + struct zynqmp_r5_pdata *pdata = rproc->priv; > + struct device *dev = &pdata->dev; > + struct device_node *np = dev->of_node; > + struct rproc_mem_entry *mem; > + > + num_mems = of_count_phandle_with_args(np, "memory-region", NULL); > + if (num_mems <= 0) > + return 0; > + for (i = 0; i < num_mems; i++) { > + struct device_node *node; > + struct reserved_mem *rmem; > + > + node = of_parse_phandle(np, "memory-region", i); > + rmem = of_reserved_mem_lookup(node); > + if (!rmem) { > + dev_err(dev, "unable to acquire memory-region\n"); > + return -EINVAL; > + } > + > + if (strstr(node->name, "vdev0buffer")) { > + /* Register DMA region */ > + mem = rproc_mem_entry_init(dev, NULL, > + (dma_addr_t)rmem->base, > + rmem->size, rmem->base, > + NULL, NULL, > + "vdev0buffer"); > + if (!mem) { > + dev_err(dev, "unable to initialize memory-region %s\n", > + node->name); > + return -ENOMEM; > + } > + dev_dbg(dev, "parsed %s at %llx\r\n", mem->name, > + mem->dma); > + } else if (strstr(node->name, "vdev0vring")) { > + int vring_id; > + char name[16]; > + > + /* > + * can be 1 of multiple vring IDs per IPC channel > + * e.g. 'vdev0vring0' and 'vdev0vring1' > + */ > + vring_id = node->name[14] - '0'; > + snprintf(name, sizeof(name), "vdev0vring%d", vring_id); > + /* Register vring */ > + mem = rproc_mem_entry_init(dev, NULL, > + (dma_addr_t)rmem->base, > + rmem->size, rmem->base, > + zynqmp_r5_rproc_mem_alloc, > + zynqmp_r5_rproc_mem_release, > + name); > + dev_dbg(dev, "parsed %s at %llx\r\n", mem->name, > + mem->dma); > + } else { > + int idx; > + > + /* > + * if TCM update address space for R5 and > + * make xilinx platform mgmt call > + */ > + for (idx = 0; idx < ZYNQMP_R5_NUM_TCM_BANKS; idx++) { > + if (tcm_addr_to_pnode[idx][0] == rmem->base) > + break; > + } > + > + if (idx != ZYNQMP_R5_NUM_TCM_BANKS) { > + mem = handle_tcm_parsing(dev, rmem, node, idx); > + } else { > + mem = rproc_mem_entry_init(dev, NULL, > + (dma_addr_t)rmem->base, > + rmem->size, rmem->base, > + zynqmp_r5_rproc_mem_alloc, > + zynqmp_r5_rproc_mem_release, > + node->name); > + } > + > + if (!mem) { > + dev_err(dev, > + "unable to init memory-region %s\n", > + node->name); > + return -ENOMEM; > + } > + } > + rproc_add_carveout(rproc, mem); > + } > + > + return 0; > +} > + > +static int zynqmp_r5_parse_fw(struct rproc *rproc, const struct firmware *fw) > +{ > + int ret; > + struct zynqmp_r5_pdata *pdata = rproc->priv; > + struct device *dev = &pdata->dev; > + > + ret = parse_mem_regions(rproc); > + if (ret) { > + dev_err(dev, "parse_mem_regions failed %x\n", ret); > + return ret; > + } > + > + ret = rproc_elf_load_rsc_table(rproc, fw); > + if (ret == -EINVAL) { > + dev_dbg(dev, "no resource table found.\n"); > + ret = 0; > + } > + return ret; > +} > + > +/* kick a firmware */ > +static void zynqmp_r5_rproc_kick(struct rproc *rproc, int vqid) > +{ > + struct device *dev = rproc->dev.parent; > + struct zynqmp_r5_pdata *pdata = rproc->priv; > + > + dev_dbg(dev, "KICK Firmware to start send messages vqid %d\n", vqid); > + > + if (vqid < 0) { > + /* If vqid is negative, does not pass the vqid to > + * mailbox. As vqid is supposed to be 0 or possive. > + * It also gives a way to just kick instead but > + * not use the IPI buffer. It is better to provide > + * a proper way to pass the short message, which will > + * need to sync to upstream first, for now, > + * use negative vqid to assume no message will be > + * passed with IPI buffer, but just raise interrupt. > + * This will be faster as it doesn't need to copy the > + * message to the IPI buffer. > + * > + * It will ignore the return, as failure is due to > + * there already kicks in the mailbox queue. > + */ > + (void)mbox_send_message(pdata->tx_chan, NULL); > + } else { > + struct sk_buff *skb; > + unsigned int skb_len; > + struct zynqmp_ipi_message *mb_msg; > + int ret; > + > + skb_len = (unsigned int)(sizeof(vqid) + sizeof(mb_msg)); > + skb = alloc_skb(skb_len, GFP_ATOMIC); > + if (!skb) { > + dev_err(dev, > + "Failed to allocate skb to kick remote.\n"); > + return; > + } > + mb_msg = (struct zynqmp_ipi_message *)skb_put(skb, skb_len); > + mb_msg->len = sizeof(vqid); > + memcpy(mb_msg->data, &vqid, sizeof(vqid)); > + skb_queue_tail(&pdata->tx_mc_skbs, skb); > + ret = mbox_send_message(pdata->tx_chan, mb_msg); > + if (ret < 0) { > + dev_warn(dev, "Failed to kick remote.\n"); > + skb_dequeue_tail(&pdata->tx_mc_skbs); > + kfree_skb(skb); > + } > + } > +} > + > +static struct rproc_ops zynqmp_r5_rproc_ops = { > + .start = zynqmp_r5_rproc_start, > + .stop = zynqmp_r5_rproc_stop, > + .load = rproc_elf_load_segments, > + .parse_fw = zynqmp_r5_parse_fw, > + .find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table, > + .sanity_check = rproc_elf_sanity_check, > + .get_boot_addr = rproc_elf_get_boot_addr, > + .kick = zynqmp_r5_rproc_kick, > +}; > + > +/* zynqmp_r5_mem_probe() - probes RPU TCM memory device > + * @pdata: pointer to the RPU remoteproc private data > + * @node: pointer to the memory node > + * > + * Function to retrieve resources for RPU TCM memory device. > + */ > +static int zynqmp_r5_mem_probe(struct zynqmp_r5_pdata *pdata, > + struct device_node *node) > +{ > + struct device *dev; > + struct zynqmp_r5_mem *mem; > + int ret; > + struct property *prop; > + const __be32 *cur; > + u32 val; > + int i; > + > + dev = &pdata->dev; > + mem = devm_kzalloc(dev, sizeof(*mem), GFP_KERNEL); > + if (!mem) > + return -ENOMEM; > + ret = of_address_to_resource(node, 0, &mem->res); > + if (ret < 0) { > + dev_err(dev, "failed to get resource of memory %s", > + of_node_full_name(node)); > + return -EINVAL; > + } > + > + /* Get the power domain id */ > + i = 0; > + if (of_find_property(node, "pnode-id", NULL)) { > + of_property_for_each_u32(node, "pnode-id", prop, cur, val) > + mem->pnode_id[i++] = val; > + } > + list_add_tail(&mem->node, &pdata->mems); > + return 0; > +} > + > +/** > + * zynqmp_r5_release() - ZynqMP R5 device release function > + * @dev: pointer to the device struct of ZynqMP R5 > + * > + * Function to release ZynqMP R5 device. > + */ > +static void zynqmp_r5_release(struct device *dev) > +{ > + struct zynqmp_r5_pdata *pdata; > + struct rproc *rproc; > + struct sk_buff *skb; > + > + pdata = dev_get_drvdata(dev); > + rproc = pdata->rproc; > + if (rproc) { > + rproc_del(rproc); > + rproc_free(rproc); > + } > + if (pdata->tx_chan) > + mbox_free_channel(pdata->tx_chan); > + if (pdata->rx_chan) > + mbox_free_channel(pdata->rx_chan); > + /* Discard all SKBs */ > + while (!skb_queue_empty(&pdata->tx_mc_skbs)) { > + skb = skb_dequeue(&pdata->tx_mc_skbs); > + kfree_skb(skb); > + } > + > + put_device(dev->parent); > +} > + > +/** > + * event_notified_idr_cb() - event notified idr callback > + * @id: idr id > + * @ptr: pointer to idr private data > + * @data: data passed to idr_for_each callback > + * > + * Pass notification to remoteproc virtio > + * > + * Return: 0. having return is to satisfy the idr_for_each() function > + * pointer input argument requirement. > + **/ > +static int event_notified_idr_cb(int id, void *ptr, void *data) > +{ > + struct rproc *rproc = data; > + > + (void)rproc_vq_interrupt(rproc, id); > + return 0; > +} > + > +/** > + * handle_event_notified() - remoteproc notification work funciton > + * @work: pointer to the work structure > + * > + * It checks each registered remoteproc notify IDs. > + */ > +static void handle_event_notified(struct work_struct *work) > +{ > + struct rproc *rproc; > + struct zynqmp_r5_pdata *pdata; > + > + pdata = container_of(work, struct zynqmp_r5_pdata, mbox_work); > + > + (void)mbox_send_message(pdata->rx_chan, NULL); > + rproc = pdata->rproc; > + /* > + * We only use IPI for interrupt. The firmware side may or may > + * not write the notifyid when it trigger IPI. > + * And thus, we scan through all the registered notifyids. > + */ > + idr_for_each(&rproc->notifyids, event_notified_idr_cb, rproc); > +} > + > +/** > + * zynqmp_r5_mb_rx_cb() - Receive channel mailbox callback > + * @cl: mailbox client > + * @mssg: message pointer > + * > + * It will schedule the R5 notification work. > + */ > +static void zynqmp_r5_mb_rx_cb(struct mbox_client *cl, void *mssg) > +{ > + struct zynqmp_r5_pdata *pdata; > + > + pdata = container_of(cl, struct zynqmp_r5_pdata, rx_mc); > + if (mssg) { > + struct zynqmp_ipi_message *ipi_msg, *buf_msg; > + size_t len; > + > + ipi_msg = (struct zynqmp_ipi_message *)mssg; > + buf_msg = (struct zynqmp_ipi_message *)pdata->rx_mc_buf; > + len = (ipi_msg->len >= IPI_BUF_LEN_MAX) ? > + IPI_BUF_LEN_MAX : ipi_msg->len; > + buf_msg->len = len; > + memcpy(buf_msg->data, ipi_msg->data, len); > + } > + schedule_work(&pdata->mbox_work); > +} > + > +/** > + * zynqmp_r5_mb_tx_done() - Request has been sent to the remote > + * @cl: mailbox client > + * @mssg: pointer to the message which has been sent > + * @r: status of last TX - OK or error > + * > + * It will be called by the mailbox framework when the last TX has done. > + */ > +static void zynqmp_r5_mb_tx_done(struct mbox_client *cl, void *mssg, int r) > +{ > + struct zynqmp_r5_pdata *pdata; > + struct sk_buff *skb; > + > + if (!mssg) > + return; > + pdata = container_of(cl, struct zynqmp_r5_pdata, tx_mc); > + skb = skb_dequeue(&pdata->tx_mc_skbs); > + kfree_skb(skb); > +} > + > +/** > + * zynqmp_r5_setup_mbox() - Setup mailboxes > + * > + * @pdata: pointer to the ZynqMP R5 processor platform data > + * @node: pointer of the device node > + * > + * Function to setup mailboxes to talk to RPU. > + * > + * Return: 0 for success, negative value for failure. > + */ > +static int zynqmp_r5_setup_mbox(struct zynqmp_r5_pdata *pdata, > + struct device_node *node) > +{ > + struct device *dev = &pdata->dev; > + struct mbox_client *mclient; > + > + /* Setup TX mailbox channel client */ > + mclient = &pdata->tx_mc; > + mclient->dev = dev; > + mclient->rx_callback = NULL; > + mclient->tx_block = false; > + mclient->knows_txdone = false; > + mclient->tx_done = zynqmp_r5_mb_tx_done; > + > + /* Setup TX mailbox channel client */ > + mclient = &pdata->rx_mc; > + mclient->dev = dev; > + mclient->rx_callback = zynqmp_r5_mb_rx_cb; > + mclient->tx_block = false; > + mclient->knows_txdone = false; > + > + INIT_WORK(&pdata->mbox_work, handle_event_notified); > + > + /* Request TX and RX channels */ > + pdata->tx_chan = mbox_request_channel_byname(&pdata->tx_mc, "tx"); > + if (IS_ERR(pdata->tx_chan)) { > + dev_err(dev, "failed to request mbox tx channel.\n"); > + pdata->tx_chan = NULL; > + return -EINVAL; > + } > + pdata->rx_chan = mbox_request_channel_byname(&pdata->rx_mc, "rx"); > + if (IS_ERR(pdata->rx_chan)) { > + dev_err(dev, "failed to request mbox rx channel.\n"); > + pdata->rx_chan = NULL; > + return -EINVAL; > + } > + skb_queue_head_init(&pdata->tx_mc_skbs); > + return 0; > +} > + > +/** > + * zynqmp_r5_probe() - Probes ZynqMP R5 processor device node > + * @pdata: pointer to the ZynqMP R5 processor platform data > + * @pdev: parent RPU domain platform device > + * @node: pointer of the device node > + * > + * Function to retrieve the information of the ZynqMP R5 device node. > + * > + * Return: 0 for success, negative value for failure. > + */ > +static int zynqmp_r5_probe(struct zynqmp_r5_pdata *pdata, > + struct platform_device *pdev, > + struct device_node *node) > +{ > + struct device *dev = &pdata->dev; > + struct rproc *rproc; > + struct device_node *nc; > + int ret; > + > + /* Create device for ZynqMP R5 device */ > + dev->parent = &pdev->dev; > + dev->release = zynqmp_r5_release; > + dev->of_node = node; > + dev_set_name(dev, "%s", of_node_full_name(node)); > + dev_set_drvdata(dev, pdata); > + ret = device_register(dev); > + if (ret) { > + dev_err(dev, "failed to register device.\n"); > + return ret; > + } > + get_device(&pdev->dev); > + > + /* Allocate remoteproc instance */ > + rproc = rproc_alloc(dev, dev_name(dev), &zynqmp_r5_rproc_ops, NULL, 0); > + if (!rproc) { > + dev_err(dev, "rproc allocation failed.\n"); > + ret = -ENOMEM; > + goto error; > + } > + rproc->auto_boot = autoboot; > + pdata->rproc = rproc; > + rproc->priv = pdata; > + > + /* > + * The device has not been spawned from a device tree, so > + * arch_setup_dma_ops has not been called, thus leaving > + * the device with dummy DMA ops. > + * Fix this by inheriting the parent's DMA ops and mask. > + */ > + rproc->dev.dma_mask = pdev->dev.dma_mask; > + set_dma_ops(&rproc->dev, get_dma_ops(&pdev->dev)); > + > + /* Probe R5 memory devices */ > + INIT_LIST_HEAD(&pdata->mems); > + for_each_available_child_of_node(node, nc) { > + ret = zynqmp_r5_mem_probe(pdata, nc); > + if (ret) { > + dev_err(dev, "failed to probe memory %s.\n", > + of_node_full_name(nc)); > + goto error; > + } > + } > + > + /* Set up DMA mask */ > + ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32)); > + if (ret) { > + dev_warn(dev, "dma_set_coherent_mask failed: %d\n", ret); > + /* If DMA is not configured yet, try to configure it. */ > + ret = of_dma_configure(dev, node, true); > + if (ret) { > + dev_err(dev, "failed to configure DMA.\n"); > + goto error; > + } > + } > + > + /* Get R5 power domain node */ > + ret = of_property_read_u32(node, "pnode-id", &pdata->pnode_id); > + if (ret) { > + dev_err(dev, "failed to get power node id.\n"); > + goto error; > + } > + > + /* TODO Check if R5 is running */ > + > + /* Set up R5 if not already setup */ > + ret = pdata->is_r5_mode_set ? 0 : r5_set_mode(pdata); > + if (ret) { > + dev_err(dev, "failed to set R5 operation mode.\n"); > + return ret; > + } > + > + if (!of_get_property(dev->of_node, "mboxes", NULL)) { > + dev_dbg(dev, "no mailboxes.\n"); > + goto error; > + } else { > + ret = zynqmp_r5_setup_mbox(pdata, node); > + if (ret < 0) > + goto error; > + } > + > + /* Add R5 remoteproc */ > + ret = rproc_add(rproc); > + if (ret) { > + dev_err(dev, "rproc registration failed\n"); > + goto error; > + } > + return 0; > +error: > + if (pdata->rproc) > + rproc_free(pdata->rproc); > + pdata->rproc = NULL; > + device_unregister(dev); > + put_device(&pdev->dev); > + return ret; > +} > + > +static int zynqmp_r5_remoteproc_probe(struct platform_device *pdev) > +{ > + int ret, i = 0; > + u32 *lockstep_mode; Can this just be a regular variable? > + struct device *dev = &pdev->dev; > + struct device_node *nc; > + struct zynqmp_r5_pdata *pdata; > + > + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); > + lockstep_mode = devm_kzalloc(dev, sizeof(u32 *), GFP_KERNEL); > + if (!pdata || !lockstep_mode) > + return -ENOMEM; > + > + platform_set_drvdata(pdev, pdata); > + > + of_property_read_u32(dev->of_node, "lockstep-mode", lockstep_mode); To make Rob's life a little easier this should probably be "xilinx,cluster-mode" so that it follows what TI has done. I am out of time for today, I will continue tomorrow. Thanks, Mathieu > + > + if (!(*lockstep_mode)) { > + rpu_mode = PM_RPU_MODE_SPLIT; > + } else if (*lockstep_mode == 1) { > + rpu_mode = PM_RPU_MODE_LOCKSTEP; > + } else { > + dev_err(dev, > + "Invalid lockstep-mode mode provided - %x %d\n", > + *lockstep_mode, rpu_mode); > + return -EINVAL; > + } > + dev_dbg(dev, "RPU configuration: %s\r\n", > + (*lockstep_mode) ? "lockstep" : "split"); > + > + for_each_available_child_of_node(dev->of_node, nc) { > + ret = zynqmp_r5_probe(&rpus[i], pdev, nc); > + if (ret) { > + dev_err(dev, "failed to probe rpu %s.\n", > + of_node_full_name(nc)); > + return ret; > + } > + i++; > + } > + > + return 0; > +} > + > +static int zynqmp_r5_remoteproc_remove(struct platform_device *pdev) > +{ > + int i; > + > + for (i = 0; i < MAX_RPROCS; i++) { > + struct zynqmp_r5_pdata *pdata = &rpus[i]; > + struct rproc *rproc; > + > + rproc = pdata->rproc; > + if (rproc) { > + rproc_del(rproc); > + rproc_free(rproc); > + pdata->rproc = NULL; > + } > + if (pdata->tx_chan) { > + mbox_free_channel(pdata->tx_chan); > + pdata->tx_chan = NULL; > + } > + if (pdata->rx_chan) { > + mbox_free_channel(pdata->rx_chan); > + pdata->rx_chan = NULL; > + } > + > + device_unregister(&pdata->dev); > + } > + > + return 0; > +} > + > +/* Match table for OF platform binding */ > +static const struct of_device_id zynqmp_r5_remoteproc_match[] = { > + { .compatible = "xlnx,zynqmp-r5-remoteproc-1.0", }, > + { /* end of list */ }, > +}; > +MODULE_DEVICE_TABLE(of, zynqmp_r5_remoteproc_match); > + > +static struct platform_driver zynqmp_r5_remoteproc_driver = { > + .probe = zynqmp_r5_remoteproc_probe, > + .remove = zynqmp_r5_remoteproc_remove, > + .driver = { > + .name = "zynqmp_r5_remoteproc", > + .of_match_table = zynqmp_r5_remoteproc_match, > + }, > +}; > +module_platform_driver(zynqmp_r5_remoteproc_driver); > + > +module_param_named(autoboot, autoboot, bool, 0444); > +MODULE_PARM_DESC(autoboot, > + "enable | disable autoboot. (default: false)"); > + > +MODULE_AUTHOR("Ben Levinsky "); > +MODULE_LICENSE("GPL v2"); > -- > 2.17.1 >