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From: "Iremonger, Bernard" <bernard.iremonger@intel.com>
To: Tetsuya Mukawa <mukawa@igel.co.jp>, "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH v2 6/6] eal: Fix interface of pci_map_resource()
Date: Wed, 25 Mar 2015 15:03:57 +0000
Message-ID: <8CEF83825BEC744B83065625E567D7C204A02424@IRSMSX108.ger.corp.intel.com> (raw)
In-Reply-To: <1427170717-13879-7-git-send-email-mukawa@igel.co.jp>

> -----Original Message-----
> From: Tetsuya Mukawa [mailto:mukawa@igel.co.jp]
> Sent: Tuesday, March 24, 2015 4:19 AM
> To: dev@dpdk.org
> Cc: Iremonger, Bernard; Richardson, Bruce; david.marchand@6wind.com; Tetsuya Mukawa
> Subject: [PATCH v2 6/6] eal: Fix interface of pci_map_resource()
> 
> The function is implemented in both linuxapp and bsdapp, but interface is different. The patch fixes
> the function of bsdapp to do same as linuxapp. After applying it, file descriptor should be opened and
> closed out of pci_map_resource().
> Also, remove redundant error messages from linuxapp.
> 
> Signed-off-by: Tetsuya Mukawa <mukawa@igel.co.jp>
> ---
>  lib/librte_eal/bsdapp/eal/eal_pci.c       | 111 ++++++++++++++++++------------
>  lib/librte_eal/linuxapp/eal/eal_pci_uio.c |  21 +++---
>  2 files changed, 77 insertions(+), 55 deletions(-)
> 
> diff --git a/lib/librte_eal/bsdapp/eal/eal_pci.c b/lib/librte_eal/bsdapp/eal/eal_pci.c
> index 08b91b4..d83916b 100644
> --- a/lib/librte_eal/bsdapp/eal/eal_pci.c
> +++ b/lib/librte_eal/bsdapp/eal/eal_pci.c
> @@ -100,7 +100,7 @@ struct mapped_pci_resource {
> 
>  	struct rte_pci_addr pci_addr;
>  	char path[PATH_MAX];
> -	size_t nb_maps;
> +	int nb_maps;
>  	struct pci_map maps[PCI_MAX_RESOURCE];  };
> 
> @@ -122,47 +122,30 @@ pci_unbind_kernel_driver(struct rte_pci_device *dev __rte_unused)
> 
>  /* map a particular resource from a file */  static void * -pci_map_resource(void *requested_addr,
> const char *devname, off_t offset,
> -		 size_t size)
> +pci_map_resource(void *requested_addr, int fd, off_t offset, size_t size,
> +		 int additional_flags)
>  {
> -	int fd;
>  	void *mapaddr;
> 
> -	/*
> -	 * open devname, to mmap it
> -	 */
> -	fd = open(devname, O_RDWR);
> -	if (fd < 0) {
> -		RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
> -			devname, strerror(errno));
> -		goto fail;
> -	}
> -
>  	/* Map the PCI memory resource of device */
>  	mapaddr = mmap(requested_addr, size, PROT_READ | PROT_WRITE,
> -			MAP_SHARED, fd, offset);
> -	close(fd);
> -	if (mapaddr == MAP_FAILED ||
> -			(requested_addr != NULL && mapaddr != requested_addr)) {
> -		RTE_LOG(ERR, EAL, "%s(): cannot mmap(%s(%d), %p, 0x%lx, 0x%lx):"
> -			" %s (%p)\n", __func__, devname, fd, requested_addr,
> +			MAP_SHARED | additional_flags, fd, offset);
> +	if (mapaddr == MAP_FAILED) {
> +		RTE_LOG(ERR, EAL,
> +			"%s(): cannot mmap(%d, %p, 0x%lx, 0x%lx): %s (%p)\n",
> +			__func__, fd, requested_addr,
>  			(unsigned long)size, (unsigned long)offset,
>  			strerror(errno), mapaddr);
> -		goto fail;
> -	}
> -
> -	RTE_LOG(DEBUG, EAL, "  PCI memory mapped at %p\n", mapaddr);
> +	} else
> +		RTE_LOG(DEBUG, EAL, "  PCI memory mapped at %p\n", mapaddr);
> 
>  	return mapaddr;
> -
> -fail:
> -	return NULL;
>  }
> 
>  static int
>  pci_uio_map_secondary(struct rte_pci_device *dev)  {
> -	size_t i;
> +	int i, fd;
>  	struct mapped_pci_resource *uio_res;
>  	struct mapped_pci_res_list *uio_res_list =
>  			RTE_TAILQ_CAST(rte_uio_tailq.head, mapped_pci_res_list); @@ -170,19
> +153,34 @@ pci_uio_map_secondary(struct rte_pci_device *dev)
>  	TAILQ_FOREACH(uio_res, uio_res_list, next) {
> 
>  		/* skip this element if it doesn't match our PCI address */
> -		if (memcmp(&uio_res->pci_addr, &dev->addr, sizeof(dev->addr)))
> +		if (rte_eal_compare_pci_addr(&uio_res->pci_addr, &dev->addr))
>  			continue;
> 
>  		for (i = 0; i != uio_res->nb_maps; i++) {
> -			if (pci_map_resource(uio_res->maps[i].addr,
> -					     uio_res->path,
> -					     (off_t)uio_res->maps[i].offset,
> -					     (size_t)uio_res->maps[i].size)
> -			    != uio_res->maps[i].addr) {
> +			/*
> +			 * open devname, to mmap it
> +			 */
> +			fd = open(uio_res->maps[i].path, O_RDWR);
> +			if (fd < 0) {
> +				RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
> +					uio_res->maps[i].path, strerror(errno));
> +				return -1;
> +			}
> +
> +			void *mapaddr = pci_map_resource(uio_res->maps[i].addr,
> +					fd, (off_t)uio_res->maps[i].offset,
> +					(size_t)uio_res->maps[i].size, 0);
> +			if (mapaddr != uio_res->maps[i].addr) {
>  				RTE_LOG(ERR, EAL,
> -					"Cannot mmap device resource\n");
> +						"Cannot mmap device resource "
> +						"file %s to address: %p\n",
> +						uio_res->maps[i].path,
> +						uio_res->maps[i].addr);
> +				close(fd);
>  				return -1;
>  			}
> +			/* fd is not needed in slave process, close it */
> +			close(fd);
>  		}
>  		return 0;
>  	}
> @@ -248,24 +246,43 @@ pci_uio_map_resource(struct rte_pci_device *dev)
> 
>  	maps = uio_res->maps;
>  	for (i = 0, map_idx = 0; i != PCI_MAX_RESOURCE; i++) {
> +		int fd;
> 
>  		/* skip empty BAR */
>  		if ((phaddr = dev->mem_resource[i].phys_addr) == 0)
>  			continue;
> 
> +		/* allocate memory to keep path */
> +		maps[map_idx].path = rte_malloc(NULL, strlen(devname) + 1, 0);
> +		if (maps[map_idx].path == NULL) {
> +			RTE_LOG(ERR, EAL, "Cannot allocate memory for "
> +					"path: %s\n", strerror(errno));
> +			goto fail0;
> +		}
> +
> +		/*
> +		 * open resource file, to mmap it
> +		 */
> +		fd = open(devname, O_RDWR);
> +		if (fd < 0) {
> +			RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
> +					devname, strerror(errno));
> +			goto fail1;
> +		}
> +
>  		/* if matching map is found, then use it */
>  		offset = i * pagesz;
> -		maps[map_idx].offset = offset;
> +		mapaddr = pci_map_resource(NULL, fd, (off_t)offset,
> +					(size_t)dev->mem_resource[i].len, 0);
> +		close(fd);
> +		if (mapaddr == MAP_FAILED)
> +			goto fail1;
> +
>  		maps[map_idx].phaddr = dev->mem_resource[i].phys_addr;
>  		maps[map_idx].size = dev->mem_resource[i].len;
> -		mapaddr = pci_map_resource(NULL, devname, (off_t)offset,
> -					(size_t)maps[map_idx].size);
> -		if ((maps[map_idx].addr != NULL) || (mapaddr == NULL)) {
> -			rte_free(uio_res);
> -			return -1;
> -		}
> -
>  		maps[map_idx].addr = mapaddr;
> +		maps[map_idx].offset = offset;
> +		strcpy(maps[map_idx].path, devname);
>  		map_idx++;
>  		dev->mem_resource[i].addr = mapaddr;
>  	}
> @@ -275,6 +292,14 @@ pci_uio_map_resource(struct rte_pci_device *dev)
>  	TAILQ_INSERT_TAIL(uio_res_list, uio_res, next);
> 
>  	return 0;
> +
> +fail1:
> +	rte_free(maps[map_idx].path);
> +fail0:
> +	for (i = 0; i < map_idx; i++)

Hi Tetsuya,

fail1: falls through to  fail0:
Would it be cleaner to drop fail1: and change the for loop in fail0:  to
for (i = 0; i <= map_idx; i++) 

Regards,

Bernard.

> +		rte_free(maps[i].path);
> +	rte_free(uio_res);
> +	return -1;
>  }
> 
>  /* Scan one pci sysfs entry, and fill the devices list from it. */ diff --git
> a/lib/librte_eal/linuxapp/eal/eal_pci_uio.c b/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
> index 0128cec..1f94d3a 100644
> --- a/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
> +++ b/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
> @@ -116,17 +116,11 @@ pci_uio_map_secondary(struct rte_pci_device *dev)
>  					fd, (off_t)uio_res->maps[i].offset,
>  					(size_t)uio_res->maps[i].size, 0);
>  			if (mapaddr != uio_res->maps[i].addr) {
> -				if (mapaddr == MAP_FAILED)
> -					RTE_LOG(ERR, EAL,
> -							"Cannot mmap device resource file %s: %s\n",
> -							uio_res->maps[i].path,
> -							strerror(errno));
> -				else
> -					RTE_LOG(ERR, EAL,
> -							"Cannot mmap device resource file %s to
> address: %p\n",
> -							uio_res->maps[i].path,
> -							uio_res->maps[i].addr);
> -
> +				RTE_LOG(ERR, EAL,
> +						"Cannot mmap device resource "
> +						"file %s to address: %p\n",
> +						uio_res->maps[i].path,
> +						uio_res->maps[i].addr);
>  				close(fd);
>  				return -1;
>  			}
> @@ -348,8 +342,11 @@ pci_uio_map_resource(struct rte_pci_device *dev)
> 
>  		/* allocate memory to keep path */
>  		maps[map_idx].path = rte_malloc(NULL, strlen(devname) + 1, 0);
> -		if (maps[map_idx].path == NULL)
> +		if (maps[map_idx].path == NULL) {
> +			RTE_LOG(ERR, EAL, "Cannot allocate memory for "
> +					"path: %s\n", strerror(errno));
>  			goto fail0;
> +		}
> 
>  		/*
>  		 * open resource file, to mmap it
> --
> 1.9.1

  reply	other threads:[~2015-03-25 15:04 UTC|newest]

Thread overview: 87+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-04  3:11 [dpdk-dev] [PATCH 1/3] BSD: Support Port Hotplug function Tetsuya Mukawa
2015-03-04  3:11 ` [dpdk-dev] [PATCH 2/3] eal, ethdev: Remove CONFIG_RTE_LIBRTE_EAL_HOTPLUG Tetsuya Mukawa
2015-03-04  3:11 ` [dpdk-dev] [PATCH 3/3] doc: Remove BSD limitation from hotplug section of programmer's guide Tetsuya Mukawa
2015-03-06 10:32 ` [dpdk-dev] [PATCH 1/3] BSD: Support Port Hotplug function Iremonger, Bernard
2015-03-09  2:23   ` Tetsuya Mukawa
2015-03-12 10:24     ` Tetsuya Mukawa
2015-03-12 10:17 ` [dpdk-dev] [PATCH v2 00/15] eal: Port Hotplug support for BSD Tetsuya Mukawa
2015-03-12 10:17   ` [dpdk-dev] [PATCH v2 01/15] eal: Fix cording style of eal_pci.c and eal_pci_uio.c Tetsuya Mukawa
2015-03-12 10:48     ` Bruce Richardson
2015-03-12 10:57       ` Qiu, Michael
2015-03-12 11:09         ` Bruce Richardson
2015-03-13  0:25           ` Tetsuya Mukawa
2015-03-12 10:17   ` [dpdk-dev] [PATCH v2 02/15] eal: Close file descriptor of uio configuration Tetsuya Mukawa
2015-03-13 13:54     ` Iremonger, Bernard
2015-03-12 10:17   ` [dpdk-dev] [PATCH v2 03/15] eal: Fix memory leak of pci_uio_map_resource() Tetsuya Mukawa
2015-03-13 14:04     ` Iremonger, Bernard
2015-03-17  9:30     ` [dpdk-dev] [PATCH 0/6] Clean up pci uio implementations Tetsuya Mukawa
2015-03-17  9:30       ` [dpdk-dev] [PATCH 1/6] eal: Fix cording style of eal_pci.c and eal_pci_uio.c Tetsuya Mukawa
2015-03-18 14:29         ` Bruce Richardson
2015-03-18 15:08         ` David Marchand
2015-03-17  9:30       ` [dpdk-dev] [PATCH 2/6] eal: Close file descriptor of uio configuration Tetsuya Mukawa
2015-03-18 15:19         ` David Marchand
2015-03-20  1:53           ` Tetsuya Mukawa
2015-03-19 16:04         ` Iremonger, Bernard
2015-03-20  1:54           ` Tetsuya Mukawa
2015-03-17  9:30       ` [dpdk-dev] [PATCH 3/6] eal: Fix memory leaks and needless incrementation of pci uio implementation Tetsuya Mukawa
2015-03-18 15:39         ` David Marchand
2015-03-20  1:53           ` Tetsuya Mukawa
2015-03-19 16:20         ` Iremonger, Bernard
2015-03-20  1:54           ` Tetsuya Mukawa
2015-03-17  9:30       ` [dpdk-dev] [PATCH 4/6] eal/bsdapp: Change names of pci related data structure Tetsuya Mukawa
2015-03-17  9:30       ` [dpdk-dev] [PATCH 5/6] eal: Use map_idx in pci_uio_map_resource() of bsdapp to work same as linuxapp Tetsuya Mukawa
2015-03-17  9:30       ` [dpdk-dev] [PATCH 6/6] eal: Fix interface of pci_map_resource() Tetsuya Mukawa
2015-03-20  9:53         ` Iremonger, Bernard
2015-03-24  4:18           ` Tetsuya Mukawa
2015-03-24  4:18         ` [dpdk-dev] [PATCH v2 0/6] Clean up pci uio implementations Tetsuya Mukawa
2015-03-24  4:18           ` [dpdk-dev] [PATCH v2 1/6] eal: Fix coding style of eal_pci.c and eal_pci_uio.c Tetsuya Mukawa
2015-03-24  4:18           ` [dpdk-dev] [PATCH v2 2/6] eal: Close file descriptor of uio configuration Tetsuya Mukawa
2015-03-24 18:33             ` Stephen Hemminger
2015-03-25  3:17               ` Tetsuya Mukawa
2015-03-25  5:07                 ` Stephen Hemminger
2015-03-26  4:19                   ` Tetsuya Mukawa
2015-03-26 10:03                     ` Iremonger, Bernard
2015-03-27  6:01                       ` Tetsuya Mukawa
2015-03-24  4:18           ` [dpdk-dev] [PATCH v2 3/6] eal: Fix memory leaks and needless increment of pci_map_addr Tetsuya Mukawa
2015-03-25 15:00             ` Iremonger, Bernard
2015-03-26  2:44               ` Tetsuya Mukawa
2015-03-24  4:18           ` [dpdk-dev] [PATCH v2 4/6] eal/bsdapp: Change names of pci related data structure Tetsuya Mukawa
2015-03-24  4:18           ` [dpdk-dev] [PATCH v2 5/6] eal: Use map_idx in pci_uio_map_resource() of bsdapp to work same as linuxapp Tetsuya Mukawa
2015-03-25 15:27             ` Iremonger, Bernard
2015-03-26  2:50               ` Tetsuya Mukawa
2015-03-26 10:41                 ` Iremonger, Bernard
2015-03-27  8:19                   ` Tetsuya Mukawa
2015-03-24  4:18           ` [dpdk-dev] [PATCH v2 6/6] eal: Fix interface of pci_map_resource() Tetsuya Mukawa
2015-03-25 15:03             ` Iremonger, Bernard [this message]
2015-03-27  8:39         ` [dpdk-dev] [PATCH v3 0/5] Clean up pci uio implementations Tetsuya Mukawa
2015-03-27  8:39           ` [dpdk-dev] [PATCH v3 1/5] eal: Fix coding style of eal_pci.c and eal_pci_uio.c Tetsuya Mukawa
2015-03-27  8:39           ` [dpdk-dev] [PATCH v3 2/5] eal: Close file descriptor of uio configuration Tetsuya Mukawa
2015-03-27  8:39           ` [dpdk-dev] [PATCH v3 3/5] eal: Fix memory leaks and needless increment of pci_map_addr Tetsuya Mukawa
2015-03-27  8:39           ` [dpdk-dev] [PATCH v3 4/5] eal/bsdapp: Change names of pci related data structure Tetsuya Mukawa
2015-03-27  8:39           ` [dpdk-dev] [PATCH v3 5/5] eal: Fix uio mapping differences between linuxapp and bsdapp Tetsuya Mukawa
2015-04-21 13:15           ` [dpdk-dev] [PATCH v3 0/5] Clean up pci uio implementations Iremonger, Bernard
2015-04-23  4:23             ` Tetsuya Mukawa
2015-04-23  8:12               ` Iremonger, Bernard
2015-04-23  9:48                 ` Tetsuya Mukawa
2015-03-12 10:17   ` [dpdk-dev] [PATCH v2 04/15] eal: Fix needless incrementation of pci_map_addr Tetsuya Mukawa
2015-03-13 14:49     ` Iremonger, Bernard
2015-03-12 10:17   ` [dpdk-dev] [PATCH v2 05/15] eal/bsdapp: Change names of pci related data structure Tetsuya Mukawa
2015-03-12 10:17   ` [dpdk-dev] [PATCH v2 06/15] eal: Use map_idx in pci_uio_map_resource() of bsdapp to work same as linuxapp Tetsuya Mukawa
2015-03-12 10:17   ` [dpdk-dev] [PATCH v2 07/15] eal: Fix interface of pci_map_resource() of bsdapp Tetsuya Mukawa
2015-03-12 11:04     ` Bruce Richardson
2015-03-12 10:17   ` [dpdk-dev] [PATCH v2 08/15] eal: Add pci_uio_alloc_uio_resource() Tetsuya Mukawa
2015-03-12 10:17   ` [dpdk-dev] [PATCH v2 09/15] eal: Add pci_uio_map_uio_resource_by_index() Tetsuya Mukawa
2015-03-12 10:17   ` [dpdk-dev] [PATCH v2 10/15] eal: Consolidate pci_map and mapped_pci_resource of linuxapp and bsdapp Tetsuya Mukawa
2015-03-12 10:17   ` [dpdk-dev] [PATCH v2 11/15] eal: Consolidate rte_eal_pci_probe/close_one_driver() " Tetsuya Mukawa
2015-03-13 15:03     ` Iremonger, Bernard
2015-03-12 10:17   ` [dpdk-dev] [PATCH v2 12/15] eal: Consolidate pci_map/unmap_device() " Tetsuya Mukawa
2015-03-13 15:10     ` Iremonger, Bernard
2015-03-12 10:17   ` [dpdk-dev] [PATCH v2 13/15] eal: Consolidate pci_map/unmap_resource() " Tetsuya Mukawa
2015-03-13 15:23     ` Iremonger, Bernard
2015-03-12 10:17   ` [dpdk-dev] [PATCH v2 14/15] eal: Consolidate pci uio functions " Tetsuya Mukawa
2015-03-12 10:17   ` [dpdk-dev] [PATCH v2 15/15] eal: Enable Port Hotplug as default in Linux and BSD Tetsuya Mukawa
2015-03-13 15:47     ` Iremonger, Bernard
2015-03-17  8:08       ` Tetsuya Mukawa
2015-03-19 11:41         ` Iremonger, Bernard
2015-03-13 11:46   ` [dpdk-dev] [PATCH v2 00/15] eal: Port Hotplug support for BSD Iremonger, Bernard
2015-03-16  3:36     ` Tetsuya Mukawa

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