From: Helin Zhang <helin.zhang@intel.com>
To: dev@dpdk.org
Subject: [dpdk-dev] [PATCH 20/22] pci: support reading/writing sys files of 'extended_tag' and 'max_read_request_size'
Date: Wed, 21 May 2014 23:30:19 +0800 [thread overview]
Message-ID: <1400686221-4696-21-git-send-email-helin.zhang@intel.com> (raw)
In-Reply-To: <1400686221-4696-1-git-send-email-helin.zhang@intel.com>
Sys files of 'extended_tag' and 'max_read_request_size' are supported by
igb_uio. Reading or writing them to enable/disable 'Extended Tag' or
reset 'Max Read Request Size' automatically according to the configurations
are added.
Signed-off-by: Helin Zhang <helin.zhang@intel.com>
Signed-off-by: Mark Chen <jing.d.chen@intel.com>
---
lib/librte_eal/linuxapp/eal/eal_pci.c | 101 ++++++++++++++++++++++++++++++++++
1 file changed, 101 insertions(+)
diff --git a/lib/librte_eal/linuxapp/eal/eal_pci.c b/lib/librte_eal/linuxapp/eal/eal_pci.c
index ac2c1fe..3956e88 100644
--- a/lib/librte_eal/linuxapp/eal/eal_pci.c
+++ b/lib/librte_eal/linuxapp/eal/eal_pci.c
@@ -107,6 +107,11 @@ TAILQ_HEAD(uio_res_list, uio_resource);
static struct uio_res_list *uio_res_list = NULL;
static int pci_parse_sysfs_value(const char *filename, uint64_t *val);
+
+#ifdef RTE_PCI_CONFIG
+static void pci_config_space_set(struct rte_pci_device *dev);
+#endif
+
/* unbind kernel driver for this device */
static int
pci_unbind_kernel_driver(struct rte_pci_device *dev)
@@ -840,6 +845,13 @@ rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr, struct rte_pci_device *d
}
if (dr->drv_flags & RTE_PCI_DRV_NEED_IGB_UIO) {
+#ifdef RTE_PCI_CONFIG
+ /*
+ * Set PCIe config space for high performance.
+ * Return value can be ignored.
+ */
+ pci_config_space_set(dev);
+#endif
/* map resources for devices that use igb_uio */
if (pci_uio_map_resource(dev) < 0)
return -1;
@@ -878,3 +890,92 @@ rte_eal_pci_init(void)
}
return 0;
}
+
+#ifdef RTE_PCI_CONFIG
+static int
+pci_config_extended_tag(struct rte_pci_device *dev)
+{
+ struct rte_pci_addr *loc = &dev->addr;
+ char filename[PATH_MAX];
+ char buf[BUFSIZ];
+ FILE *f;
+
+ /* not configured, let it as is */
+ if (strncmp(RTE_PCI_EXTENDED_TAG, "on", 2) != 0 &&
+ strncmp(RTE_PCI_EXTENDED_TAG, "off", 3) != 0)
+ return 0;
+
+ rte_snprintf(filename, sizeof(filename),
+ SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/" "extended_tag",
+ loc->domain, loc->bus, loc->devid, loc->function);
+ f = fopen(filename, "rw+");
+ if (!f)
+ return -1;
+
+ fgets(buf, sizeof(buf), f);
+ if (strncmp(RTE_PCI_EXTENDED_TAG, "on", 2) == 0) {
+ /* enable Extended Tag*/
+ if (strncmp(buf, "on", 2) != 0) {
+ fseek(f, 0, SEEK_SET);
+ fputs("on", f);
+ }
+ } else {
+ /* disable Extended Tag */
+ if (strncmp(buf, "off", 3) != 0) {
+ fseek(f, 0, SEEK_SET);
+ fputs("off", f);
+ }
+ }
+ fclose(f);
+
+ return 0;
+}
+
+static int
+pci_config_max_read_request_size(struct rte_pci_device *dev)
+{
+ struct rte_pci_addr *loc = &dev->addr;
+ char filename[PATH_MAX];
+ char buf[BUFSIZ], param[BUFSIZ];
+ FILE *f;
+ uint32_t max_size = RTE_PCI_MAX_READ_REQUEST_SIZE;
+
+ /* not configured, let it as is */
+ if (!max_size)
+ return 0;
+
+ rte_snprintf(filename, sizeof(filename),
+ SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/" "max_read_request_size",
+ loc->domain, loc->bus, loc->devid, loc->function);
+ f = fopen(filename, "rw+");
+ if (!f)
+ return -1;
+
+ fgets(buf, sizeof(buf), f);
+ rte_snprintf(param, sizeof(param), "%d", max_size);
+
+ /* check if the size to be set is the same as current */
+ if (strcmp(buf, param) == 0) {
+ fclose(f);
+ return 0;
+ }
+ fseek(f, 0, SEEK_SET);
+ fputs(param, f);
+ fclose(f);
+
+ return 0;
+}
+
+static void
+pci_config_space_set(struct rte_pci_device *dev)
+{
+ if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+ return;
+
+ /* configure extended tag */
+ pci_config_extended_tag(dev);
+
+ /* configure max read request size */
+ pci_config_max_read_request_size(dev);
+}
+#endif
--
1.8.1.4
next prev parent reply other threads:[~2014-05-21 15:31 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-21 15:29 [dpdk-dev] [PATCH 00/22][PMD][I40E] *** Add i40e PMD support *** Helin Zhang
2014-05-21 15:30 ` [dpdk-dev] [PATCH 01/22] i40e: add basic shared code Helin Zhang
2014-05-21 15:30 ` [dpdk-dev] [PATCH 02/22] i40e: add PMD source files Helin Zhang
2014-05-21 15:30 ` [dpdk-dev] [PATCH 03/22] i40e: add i40e support Helin Zhang
2014-05-21 15:30 ` [dpdk-dev] [PATCH 04/22] e1000: enlarge the hash flags of RSS to 64 bits Helin Zhang
2014-05-21 15:30 ` [dpdk-dev] [PATCH 05/22] ixgbe: " Helin Zhang
2014-05-21 15:30 ` [dpdk-dev] [PATCH 06/22] vmxnet3: " Helin Zhang
2014-05-21 15:30 ` [dpdk-dev] [PATCH 07/22] app/testpmd: " Helin Zhang
2014-05-21 15:30 ` [dpdk-dev] [PATCH 08/22] examples/qos_meter: use ETH_RSS_IP to replace IP hash flags of RSS Helin Zhang
2014-05-21 15:30 ` [dpdk-dev] [PATCH 09/22] examples/multi_process: " Helin Zhang
2014-05-21 15:30 ` [dpdk-dev] [PATCH 10/22] examples/l3fwd: " Helin Zhang
2014-05-21 15:30 ` [dpdk-dev] [PATCH 11/22] examples/l3fwd-vf: " Helin Zhang
2014-05-21 15:30 ` [dpdk-dev] [PATCH 12/22] examples/l3fwd-power: " Helin Zhang
2014-05-21 15:30 ` [dpdk-dev] [PATCH 13/22] examples/ip_reassembly: " Helin Zhang
2014-05-21 15:30 ` [dpdk-dev] [PATCH 14/22] examples/dpdk_qat: " Helin Zhang
2014-05-21 15:30 ` [dpdk-dev] [PATCH 15/22] examples/load_balancer: " Helin Zhang
2014-05-21 15:30 ` [dpdk-dev] [PATCH 16/22] app/test-pmd: tell the driver the correct packet type to support i40e TX checksum offload Helin Zhang
2014-05-21 15:30 ` [dpdk-dev] [PATCH 17/22] app/test-pmd: support displaying i40e 32 bytes RX descriptor Helin Zhang
2014-05-21 15:30 ` [dpdk-dev] [PATCH 18/22] app/test-pmd: support setting port based VLAN ID offloading Helin Zhang
2014-05-21 15:30 ` [dpdk-dev] [PATCH 19/22] igb_uio: add sys files to read/write specific bits in pci config space Helin Zhang
2014-05-21 15:30 ` Helin Zhang [this message]
2014-05-21 15:30 ` [dpdk-dev] [PATCH 21/22] config: add configurations for enabling 'Extended Tag' or resetting 'Max Read Request Size' Helin Zhang
2014-05-21 15:30 ` [dpdk-dev] [PATCH 22/22] ethdev: support setting maximum packet length to less than 1518 Helin Zhang
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