myri10ge: replace the chipset whitelist with firmware autodetection

Remove the aligned-completion whitelist, and replace it by using the 1.4.16
firmware's auto-detection features to choose which firmware to load.
The driver now loads the aligned firmware, performs a MXGEFW_CMD_UNALIGNED_TEST,
and falls back to using the unaligned firmware if:
- The firmware is too old (ie, MXGEFW_CMD_UNALIGNED_TEST is an unknown command).
- The MXGEFW_CMD_UNALIGNED_TEST returns MXGEFW_CMD_ERROR_UNALIGNED, meaning
  that it has seen an unaligned completion during the DMA test.

Signed-off-by: Brice Goglin <brice@myri.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 65 insertions, 56 deletions

diff --git a/drivers/net/myri10ge/myri10ge.c b/drivers/net/myri10ge/myri10ge.c
index f53b0dad65a..5d14be7405a 100644
--- a/drivers/net/myri10ge/myri10ge.c
+++ b/drivers/net/myri10ge/myri10ge.c
@@ -355,6 +355,8 @@ myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd,
                         return 0;
                 } else if (result == MXGEFW_CMD_UNKNOWN) {
                         return -ENOSYS;
+                } else if (result == MXGEFW_CMD_ERROR_UNALIGNED) {
+                        return -E2BIG;
                 } else {
                         dev_err(&mgp->pdev->dev,
                                 "command %d failed, result = %d\n",
@@ -2483,8 +2485,6 @@ static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
         err_cap |= PCI_ERR_CAP_ECRC_GENE;
         pci_write_config_dword(bridge, cap + PCI_ERR_CAP, err_cap);
         dev_info(dev, "Enabled ECRC on upstream bridge %s\n", pci_name(bridge));
-        mgp->tx.boundary = 4096;
-        mgp->fw_name = myri10ge_fw_aligned;
 }
 
 /*
@@ -2506,22 +2506,70 @@ static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
  * firmware image, and set tx.boundary to 4KB.
  */
 
-#define PCI_DEVICE_ID_INTEL_E5000_PCIE23 0x25f7
-#define PCI_DEVICE_ID_INTEL_E5000_PCIE47 0x25fa
-#define PCI_DEVICE_ID_INTEL_6300ESB_PCIEE1 0x3510
-#define PCI_DEVICE_ID_INTEL_6300ESB_PCIEE4 0x351b
-#define PCI_DEVICE_ID_INTEL_E3000_PCIE  0x2779
-#define PCI_DEVICE_ID_INTEL_E3010_PCIE  0x277a
-#define PCI_DEVICE_ID_SERVERWORKS_HT2100_PCIE_FIRST 0x140
-#define PCI_DEVICE_ID_SERVERWORKS_HT2100_PCIE_LAST 0x142
-
-static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
+static void myri10ge_firmware_probe(struct myri10ge_priv *mgp)
 {
-        struct pci_dev *bridge = mgp->pdev->bus->self;
+        struct pci_dev *pdev = mgp->pdev;
+        struct device *dev = &pdev->dev;
+        int cap, status;
+        u16 val;
 
+        mgp->tx.boundary = 4096;
+        /*
+         * Verify the max read request size was set to 4KB
+         * before trying the test with 4KB.
+         */
+        cap = pci_find_capability(pdev, PCI_CAP_ID_EXP);
+        if (cap < 64) {
+                dev_err(dev, "Bad PCI_CAP_ID_EXP location %d\n", cap);
+                goto abort;
+        }
+        status = pci_read_config_word(pdev, cap + PCI_EXP_DEVCTL, &val);
+        if (status != 0) {
+                dev_err(dev, "Couldn't read max read req size: %d\n", status);
+                goto abort;
+        }
+        if ((val & (5 << 12)) != (5 << 12)) {
+                dev_warn(dev, "Max Read Request size != 4096 (0x%x)\n", val);
+                mgp->tx.boundary = 2048;
+        }
+        /*
+         * load the optimized firmware (which assumes aligned PCIe
+         * completions) in order to see if it works on this host.
+         */
+        mgp->fw_name = myri10ge_fw_aligned;
+        status = myri10ge_load_firmware(mgp);
+        if (status != 0) {
+                goto abort;
+        }
+
+        /*
+         * Enable ECRC if possible
+         */
+        myri10ge_enable_ecrc(mgp);
+
+        /*
+         * Run a DMA test which watches for unaligned completions and
+         * aborts on the first one seen.
+         */
+
+        status = myri10ge_dma_test(mgp, MXGEFW_CMD_UNALIGNED_TEST);
+        if (status == 0)
+                return;         /* keep the aligned firmware */
+
+        if (status != -E2BIG)
+                dev_warn(dev, "DMA test failed: %d\n", status);
+        if (status == -ENOSYS)
+                dev_warn(dev, "Falling back to ethp! "
+                         "Please install up to date fw\n");
+abort:
+        /* fall back to using the unaligned firmware */
         mgp->tx.boundary = 2048;
         mgp->fw_name = myri10ge_fw_unaligned;
 
+}
+
+static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
+{
         if (myri10ge_force_firmware == 0) {
                 int link_width, exp_cap;
                 u16 lnk;
@@ -2530,8 +2578,6 @@ static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
                 pci_read_config_word(mgp->pdev, exp_cap + PCI_EXP_LNKSTA, &lnk);
                 link_width = (lnk >> 4) & 0x3f;
 
-                myri10ge_enable_ecrc(mgp);
-
                 /* Check to see if Link is less than 8 or if the
                  * upstream bridge is known to provide aligned
                  * completions */
@@ -2540,46 +2586,8 @@ static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
                                  link_width);
                         mgp->tx.boundary = 4096;
                         mgp->fw_name = myri10ge_fw_aligned;
-                } else if (bridge &&
-                           /* ServerWorks HT2000/HT1000 */
-                           ((bridge->vendor == PCI_VENDOR_ID_SERVERWORKS
-                             && bridge->device ==
-                             PCI_DEVICE_ID_SERVERWORKS_HT2000_PCIE)
-                            /* ServerWorks HT2100 */
-                            || (bridge->vendor == PCI_VENDOR_ID_SERVERWORKS
-                                && bridge->device >=
-                                PCI_DEVICE_ID_SERVERWORKS_HT2100_PCIE_FIRST
-                                && bridge->device <=
-                                PCI_DEVICE_ID_SERVERWORKS_HT2100_PCIE_LAST)
-                            /* All Intel E3000/E3010 PCIE ports */
-                            || (bridge->vendor == PCI_VENDOR_ID_INTEL
-                                && (bridge->device ==
-                                    PCI_DEVICE_ID_INTEL_E3000_PCIE
-                                    || bridge->device ==
-                                    PCI_DEVICE_ID_INTEL_E3010_PCIE))
-                            /* All Intel 6310/6311/6321ESB PCIE ports */
-                            || (bridge->vendor == PCI_VENDOR_ID_INTEL
-                                && bridge->device >=
-                                PCI_DEVICE_ID_INTEL_6300ESB_PCIEE1
-                                && bridge->device <=
-                                PCI_DEVICE_ID_INTEL_6300ESB_PCIEE4)
-                            /* All Intel E5000 PCIE ports */
-                            || (bridge->vendor == PCI_VENDOR_ID_INTEL
-                                && bridge->device >=
-                                PCI_DEVICE_ID_INTEL_E5000_PCIE23
-                                && bridge->device <=
-                                PCI_DEVICE_ID_INTEL_E5000_PCIE47))) {
-                        dev_info(&mgp->pdev->dev,
-                                 "Assuming aligned completions (0x%x:0x%x)\n",
-                                 bridge->vendor, bridge->device);
-                        mgp->tx.boundary = 4096;
-                        mgp->fw_name = myri10ge_fw_aligned;
-                } else if (bridge &&
-                           bridge->vendor == PCI_VENDOR_ID_SGI &&
-                           bridge->device == 0x4002 /* TIOCE pcie-port */ ) {
-                        /* this pcie bridge does not support 4K rdma request */
-                        mgp->tx.boundary = 2048;
-                        mgp->fw_name = myri10ge_fw_aligned;
+                } else {
+                        myri10ge_firmware_probe(mgp);
                 }
         } else {
                 if (myri10ge_force_firmware == 1) {
@@ -2847,7 +2855,6 @@ static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
                 status = -ENODEV;
                 goto abort_with_netdev;
         }
-        myri10ge_select_firmware(mgp);
 
         /* Find the vendor-specific cap so we can check
          * the reboot register later on */
@@ -2941,6 +2948,8 @@ static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
                 goto abort_with_ioremap;
         memset(mgp->rx_done.entry, 0, bytes);
 
+        myri10ge_select_firmware(mgp);
+
         status = myri10ge_load_firmware(mgp);
         if (status != 0) {
                 dev_err(&pdev->dev, "failed to load firmware\n");