From: Dhananjay Phadke <dhananjay@netxen.com>
Date: Mon, 2 Mar 2009 16:02:16 +0000 (+0000)
Subject: netxen: support larger dma addressing
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1f434f638457712732238329dfdf089eab25e5b3;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git
netxen: support larger dma addressing
Support larger dma mask if firmware indicates capability
to handle larger addresses.
Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
diff --git a/drivers/net/netxen/netxen_nic.h b/drivers/net/netxen/netxen_nic.h
index bbdd8f2d152b..bd5fbb4ce865 100644
--- a/drivers/net/netxen/netxen_nic.h
+++ b/drivers/net/netxen/netxen_nic.h
@@ -1256,8 +1256,6 @@ struct netxen_adapter {
u32 crb_win;
rwlock_t adapter_lock;
- uint64_t dma_mask;
-
u32 cmd_producer;
__le32 *cmd_consumer;
u32 last_cmd_consumer;
diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c
index 02f5240245b9..0ce7cf0dc99c 100644
--- a/drivers/net/netxen/netxen_nic_main.c
+++ b/drivers/net/netxen/netxen_nic_main.c
@@ -166,50 +166,61 @@ static inline void netxen_nic_enable_int(struct netxen_adapter *adapter)
static int nx_set_dma_mask(struct netxen_adapter *adapter, uint8_t revision_id)
{
struct pci_dev *pdev = adapter->pdev;
- int err;
- uint64_t mask;
-
-#ifdef CONFIG_IA64
- adapter->dma_mask = DMA_32BIT_MASK;
-#else
- if (revision_id >= NX_P3_B0) {
- /* should go to DMA_64BIT_MASK */
- adapter->dma_mask = DMA_39BIT_MASK;
- mask = DMA_39BIT_MASK;
- } else if (revision_id == NX_P3_A2) {
- adapter->dma_mask = DMA_39BIT_MASK;
- mask = DMA_39BIT_MASK;
- } else if (revision_id == NX_P2_C1) {
- adapter->dma_mask = DMA_35BIT_MASK;
- mask = DMA_35BIT_MASK;
- } else {
- adapter->dma_mask = DMA_32BIT_MASK;
- mask = DMA_32BIT_MASK;
- goto set_32_bit_mask;
- }
+ uint64_t mask, cmask;
+
+ adapter->pci_using_dac = 0;
+ mask = DMA_32BIT_MASK;
/*
* Consistent DMA mask is set to 32 bit because it cannot be set to
* 35 bits. For P3 also leave it at 32 bits for now. Only the rings
* come off this pool.
*/
+ cmask = DMA_32BIT_MASK;
+
+#ifndef CONFIG_IA64
+ if (revision_id >= NX_P3_B0)
+ mask = DMA_39BIT_MASK;
+ else if (revision_id == NX_P2_C1)
+ mask = DMA_35BIT_MASK;
+#endif
if (pci_set_dma_mask(pdev, mask) == 0 &&
- pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK) == 0) {
+ pci_set_consistent_dma_mask(pdev, cmask) == 0) {
adapter->pci_using_dac = 1;
return 0;
}
-set_32_bit_mask:
-#endif /* CONFIG_IA64 */
- err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
- if (!err)
- err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
- if (err) {
- DPRINTK(ERR, "No usable DMA configuration, aborting:%d\n", err);
- return err;
+ return -EIO;
+}
+
+/* Update addressable range if firmware supports it */
+static int
+nx_update_dma_mask(struct netxen_adapter *adapter)
+{
+ int change, shift, err;
+ uint64_t mask, old_mask;
+ struct pci_dev *pdev = adapter->pdev;
+
+ change = 0;
+
+ shift = netxen_nic_reg_read(adapter, CRB_DMA_SHIFT);
+ if (shift >= 32)
+ return 0;
+
+ if (NX_IS_REVISION_P3(adapter->ahw.revision_id) && (shift > 9))
+ change = 1;
+ else if ((adapter->ahw.revision_id == NX_P2_C1) && (shift <= 4))
+ change = 1;
+
+ if (change) {
+ old_mask = pdev->dma_mask;
+ mask = (1ULL<<(32+shift)) - 1;
+
+ err = pci_set_dma_mask(pdev, mask);
+ if (err)
+ return pci_set_dma_mask(pdev, old_mask);
}
- adapter->pci_using_dac = 0;
return 0;
}
@@ -674,6 +685,7 @@ netxen_start_firmware(struct netxen_adapter *adapter)
netxen_pinit_from_rom(adapter, 0);
msleep(1);
}
+ netxen_nic_reg_write(adapter, CRB_DMA_SHIFT, 0x55555555);
netxen_load_firmware(adapter);
if (NX_IS_REVISION_P2(adapter->ahw.revision_id)) {
@@ -851,6 +863,8 @@ netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
goto err_out_iounmap;
}
+ nx_update_dma_mask(adapter);
+
netxen_nic_flash_print(adapter);
if (NX_IS_REVISION_P3(revision_id)) {
diff --git a/drivers/net/netxen/netxen_nic_phan_reg.h b/drivers/net/netxen/netxen_nic_phan_reg.h
index 2a368f284daf..50183335e43a 100644
--- a/drivers/net/netxen/netxen_nic_phan_reg.h
+++ b/drivers/net/netxen/netxen_nic_phan_reg.h
@@ -91,6 +91,7 @@
#define CRB_RX_LRO_START_NUM NETXEN_NIC_REG(0xc0)
#define CRB_MPORT_MODE NETXEN_NIC_REG(0xc4) /* Multiport Mode */
#define CRB_CMD_RING_SIZE NETXEN_NIC_REG(0xc8)
+#define CRB_DMA_SHIFT NETXEN_NIC_REG(0xcc)
#define CRB_INT_VECTOR NETXEN_NIC_REG(0xd4)
#define CRB_CTX_RESET NETXEN_NIC_REG(0xd8)
#define CRB_HOST_STS_PROD NETXEN_NIC_REG(0xdc)