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Date: Fri, 11 Sep 2009 14:28:12 -0700
From: Dhananjay Phadke <dhananjay@...xen.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org
Subject: [PATCH 2/5] netxen: improve pci memory access
o Access on card memory through memory controller (agent)
rather than moving small pci window around. Clean up the
code for moving windows around.
o Restrict memory accesss to 64 bit, currently only firmware
download uses this.
Signed-off-by: Dhananjay Phadke <dhananjay@...xen.com>
---
drivers/net/netxen/netxen_nic.h | 4 +-
drivers/net/netxen/netxen_nic_hw.c | 348 +++++++++-------------------------
drivers/net/netxen/netxen_nic_main.c | 7 +-
3 files changed, 93 insertions(+), 266 deletions(-)
diff --git a/drivers/net/netxen/netxen_nic.h b/drivers/net/netxen/netxen_nic.h
index 2371888..7e3d2b9 100644
--- a/drivers/net/netxen/netxen_nic.h
+++ b/drivers/net/netxen/netxen_nic.h
@@ -552,8 +552,8 @@ struct netxen_hardware_context {
int qdr_sn_window;
int ddr_mn_window;
- unsigned long mn_win_crb;
- unsigned long ms_win_crb;
+ u32 mn_win_crb;
+ u32 ms_win_crb;
u8 cut_through;
u8 revision_id;
diff --git a/drivers/net/netxen/netxen_nic_hw.c b/drivers/net/netxen/netxen_nic_hw.c
index 555bc4a..018cf42 100644
--- a/drivers/net/netxen/netxen_nic_hw.c
+++ b/drivers/net/netxen/netxen_nic_hw.c
@@ -1279,25 +1279,6 @@ netxen_nic_hw_read_wx_2M(struct netxen_adapter *adapter, ulong off)
return data;
}
-/*
- * check memory access boundary.
- * used by test agent. support ddr access only for now
- */
-static unsigned long
-netxen_nic_pci_mem_bound_check(struct netxen_adapter *adapter,
- unsigned long long addr, int size)
-{
- if (!ADDR_IN_RANGE(addr,
- NETXEN_ADDR_DDR_NET, NETXEN_ADDR_DDR_NET_MAX) ||
- !ADDR_IN_RANGE(addr+size-1,
- NETXEN_ADDR_DDR_NET, NETXEN_ADDR_DDR_NET_MAX) ||
- ((size != 1) && (size != 2) && (size != 4) && (size != 8))) {
- return 0;
- }
-
- return 1;
-}
-
static int netxen_pci_set_window_warning_count;
static unsigned long
@@ -1424,10 +1405,8 @@ netxen_nic_pci_set_window_2M(struct netxen_adapter *adapter,
/* DDR network side */
window = MN_WIN(addr);
adapter->ahw.ddr_mn_window = window;
- NXWR32(adapter, adapter->ahw.mn_win_crb | NETXEN_PCI_CRBSPACE,
- window);
- win_read = NXRD32(adapter,
- adapter->ahw.mn_win_crb | NETXEN_PCI_CRBSPACE);
+ NXWR32(adapter, adapter->ahw.mn_win_crb, window);
+ win_read = NXRD32(adapter, adapter->ahw.mn_win_crb);
if ((win_read << 17) != window) {
printk(KERN_INFO "Written MNwin (0x%x) != "
"Read MNwin (0x%x)\n", window, win_read);
@@ -1442,10 +1421,8 @@ netxen_nic_pci_set_window_2M(struct netxen_adapter *adapter,
window = OCM_WIN(addr);
adapter->ahw.ddr_mn_window = window;
- NXWR32(adapter, adapter->ahw.mn_win_crb | NETXEN_PCI_CRBSPACE,
- window);
- win_read = NXRD32(adapter,
- adapter->ahw.mn_win_crb | NETXEN_PCI_CRBSPACE);
+ NXWR32(adapter, adapter->ahw.mn_win_crb, window);
+ win_read = NXRD32(adapter, adapter->ahw.mn_win_crb);
if ((win_read >> 7) != window) {
printk(KERN_INFO "%s: Written OCMwin (0x%x) != "
"Read OCMwin (0x%x)\n",
@@ -1458,10 +1435,8 @@ netxen_nic_pci_set_window_2M(struct netxen_adapter *adapter,
/* QDR network side */
window = MS_WIN(addr);
adapter->ahw.qdr_sn_window = window;
- NXWR32(adapter, adapter->ahw.ms_win_crb | NETXEN_PCI_CRBSPACE,
- window);
- win_read = NXRD32(adapter,
- adapter->ahw.ms_win_crb | NETXEN_PCI_CRBSPACE);
+ NXWR32(adapter, adapter->ahw.ms_win_crb, window);
+ win_read = NXRD32(adapter, adapter->ahw.ms_win_crb);
if (win_read != window) {
printk(KERN_INFO "%s: Written MSwin (0x%x) != "
"Read MSwin (0x%x)\n",
@@ -1484,177 +1459,6 @@ netxen_nic_pci_set_window_2M(struct netxen_adapter *adapter,
return addr;
}
-static int netxen_nic_pci_is_same_window(struct netxen_adapter *adapter,
- unsigned long long addr)
-{
- int window;
- unsigned long long qdr_max;
-
- if (NX_IS_REVISION_P2(adapter->ahw.revision_id))
- qdr_max = NETXEN_ADDR_QDR_NET_MAX_P2;
- else
- qdr_max = NETXEN_ADDR_QDR_NET_MAX_P3;
-
- if (ADDR_IN_RANGE(addr,
- NETXEN_ADDR_DDR_NET, NETXEN_ADDR_DDR_NET_MAX)) {
- /* DDR network side */
- BUG(); /* MN access can not come here */
- } else if (ADDR_IN_RANGE(addr,
- NETXEN_ADDR_OCM0, NETXEN_ADDR_OCM0_MAX)) {
- return 1;
- } else if (ADDR_IN_RANGE(addr,
- NETXEN_ADDR_OCM1, NETXEN_ADDR_OCM1_MAX)) {
- return 1;
- } else if (ADDR_IN_RANGE(addr, NETXEN_ADDR_QDR_NET, qdr_max)) {
- /* QDR network side */
- window = ((addr - NETXEN_ADDR_QDR_NET) >> 22) & 0x3f;
- if (adapter->ahw.qdr_sn_window == window)
- return 1;
- }
-
- return 0;
-}
-
-static int netxen_nic_pci_mem_read_direct(struct netxen_adapter *adapter,
- u64 off, void *data, int size)
-{
- unsigned long flags;
- void __iomem *addr, *mem_ptr = NULL;
- int ret = 0;
- u64 start;
- unsigned long mem_base;
- unsigned long mem_page;
-
- write_lock_irqsave(&adapter->adapter_lock, flags);
-
- /*
- * If attempting to access unknown address or straddle hw windows,
- * do not access.
- */
- start = adapter->pci_set_window(adapter, off);
- if ((start == -1UL) ||
- (netxen_nic_pci_is_same_window(adapter, off+size-1) == 0)) {
- write_unlock_irqrestore(&adapter->adapter_lock, flags);
- printk(KERN_ERR "%s out of bound pci memory access. "
- "offset is 0x%llx\n", netxen_nic_driver_name,
- (unsigned long long)off);
- return -1;
- }
-
- addr = pci_base_offset(adapter, start);
- if (!addr) {
- write_unlock_irqrestore(&adapter->adapter_lock, flags);
- mem_base = pci_resource_start(adapter->pdev, 0);
- mem_page = start & PAGE_MASK;
- /* Map two pages whenever user tries to access addresses in two
- consecutive pages.
- */
- if (mem_page != ((start + size - 1) & PAGE_MASK))
- mem_ptr = ioremap(mem_base + mem_page, PAGE_SIZE * 2);
- else
- mem_ptr = ioremap(mem_base + mem_page, PAGE_SIZE);
- if (mem_ptr == NULL) {
- *(uint8_t *)data = 0;
- return -1;
- }
- addr = mem_ptr;
- addr += start & (PAGE_SIZE - 1);
- write_lock_irqsave(&adapter->adapter_lock, flags);
- }
-
- switch (size) {
- case 1:
- *(uint8_t *)data = readb(addr);
- break;
- case 2:
- *(uint16_t *)data = readw(addr);
- break;
- case 4:
- *(uint32_t *)data = readl(addr);
- break;
- case 8:
- *(uint64_t *)data = readq(addr);
- break;
- default:
- ret = -1;
- break;
- }
- write_unlock_irqrestore(&adapter->adapter_lock, flags);
-
- if (mem_ptr)
- iounmap(mem_ptr);
- return ret;
-}
-
-static int
-netxen_nic_pci_mem_write_direct(struct netxen_adapter *adapter, u64 off,
- void *data, int size)
-{
- unsigned long flags;
- void __iomem *addr, *mem_ptr = NULL;
- int ret = 0;
- u64 start;
- unsigned long mem_base;
- unsigned long mem_page;
-
- write_lock_irqsave(&adapter->adapter_lock, flags);
-
- /*
- * If attempting to access unknown address or straddle hw windows,
- * do not access.
- */
- start = adapter->pci_set_window(adapter, off);
- if ((start == -1UL) ||
- (netxen_nic_pci_is_same_window(adapter, off+size-1) == 0)) {
- write_unlock_irqrestore(&adapter->adapter_lock, flags);
- printk(KERN_ERR "%s out of bound pci memory access. "
- "offset is 0x%llx\n", netxen_nic_driver_name,
- (unsigned long long)off);
- return -1;
- }
-
- addr = pci_base_offset(adapter, start);
- if (!addr) {
- write_unlock_irqrestore(&adapter->adapter_lock, flags);
- mem_base = pci_resource_start(adapter->pdev, 0);
- mem_page = start & PAGE_MASK;
- /* Map two pages whenever user tries to access addresses in two
- * consecutive pages.
- */
- if (mem_page != ((start + size - 1) & PAGE_MASK))
- mem_ptr = ioremap(mem_base + mem_page, PAGE_SIZE*2);
- else
- mem_ptr = ioremap(mem_base + mem_page, PAGE_SIZE);
- if (mem_ptr == NULL)
- return -1;
- addr = mem_ptr;
- addr += start & (PAGE_SIZE - 1);
- write_lock_irqsave(&adapter->adapter_lock, flags);
- }
-
- switch (size) {
- case 1:
- writeb(*(uint8_t *)data, addr);
- break;
- case 2:
- writew(*(uint16_t *)data, addr);
- break;
- case 4:
- writel(*(uint32_t *)data, addr);
- break;
- case 8:
- writeq(*(uint64_t *)data, addr);
- break;
- default:
- ret = -1;
- break;
- }
- write_unlock_irqrestore(&adapter->adapter_lock, flags);
- if (mem_ptr)
- iounmap(mem_ptr);
- return ret;
-}
-
#define MAX_CTL_CHECK 1000
static int
@@ -1667,19 +1471,28 @@ netxen_nic_pci_mem_write_128M(struct netxen_adapter *adapter,
uint64_t off8, tmpw, word[2] = {0, 0};
void __iomem *mem_crb;
- /*
- * If not MN, go check for MS or invalid.
- */
- if (netxen_nic_pci_mem_bound_check(adapter, off, size) == 0)
- return netxen_nic_pci_mem_write_direct(adapter,
- off, data, size);
+ if (size != 8)
+ return -EIO;
+
+ if (ADDR_IN_RANGE(off, NETXEN_ADDR_QDR_NET,
+ NETXEN_ADDR_QDR_NET_MAX_P2)) {
+ mem_crb = pci_base_offset(adapter, NETXEN_CRB_QDR_NET);
+ goto correct;
+ }
+
+ if (ADDR_IN_RANGE(off, NETXEN_ADDR_DDR_NET, NETXEN_ADDR_DDR_NET_MAX)) {
+ mem_crb = pci_base_offset(adapter, NETXEN_CRB_DDR_NET);
+ goto correct;
+ }
+
+ return -EIO;
+correct:
off8 = off & 0xfffffff8;
off0 = off & 0x7;
sz[0] = (size < (8 - off0)) ? size : (8 - off0);
sz[1] = size - sz[0];
loop = ((off0 + size - 1) >> 3) + 1;
- mem_crb = pci_base_offset(adapter, NETXEN_CRB_DDR_NET);
if ((size != 8) || (off0 != 0)) {
for (i = 0; i < loop; i++) {
@@ -1760,20 +1573,29 @@ netxen_nic_pci_mem_read_128M(struct netxen_adapter *adapter,
uint64_t off8, val, word[2] = {0, 0};
void __iomem *mem_crb;
+ if (size != 8)
+ return -EIO;
- /*
- * If not MN, go check for MS or invalid.
- */
- if (netxen_nic_pci_mem_bound_check(adapter, off, size) == 0)
- return netxen_nic_pci_mem_read_direct(adapter, off, data, size);
+ if (ADDR_IN_RANGE(off, NETXEN_ADDR_QDR_NET,
+ NETXEN_ADDR_QDR_NET_MAX_P2)) {
+ mem_crb = pci_base_offset(adapter, NETXEN_CRB_QDR_NET);
+ goto correct;
+ }
+ if (ADDR_IN_RANGE(off, NETXEN_ADDR_DDR_NET, NETXEN_ADDR_DDR_NET_MAX)) {
+ mem_crb = pci_base_offset(adapter, NETXEN_CRB_DDR_NET);
+ goto correct;
+ }
+
+ return -EIO;
+
+correct:
off8 = off & 0xfffffff8;
off0[0] = off & 0x7;
off0[1] = 0;
sz[0] = (size < (8 - off0[0])) ? size : (8 - off0[0]);
sz[1] = size - sz[0];
loop = ((off0[0] + size - 1) >> 3) + 1;
- mem_crb = pci_base_offset(adapter, NETXEN_CRB_DDR_NET);
write_lock_irqsave(&adapter->adapter_lock, flags);
netxen_nic_pci_change_crbwindow_128M(adapter, 0);
@@ -1847,20 +1669,26 @@ netxen_nic_pci_mem_write_2M(struct netxen_adapter *adapter,
{
int i, j, ret = 0, loop, sz[2], off0;
uint32_t temp;
- uint64_t off8, mem_crb, tmpw, word[2] = {0, 0};
+ uint64_t off8, tmpw, word[2] = {0, 0};
+ void __iomem *mem_crb;
- /*
- * If not MN, go check for MS or invalid.
- */
- if (off >= NETXEN_ADDR_QDR_NET && off <= NETXEN_ADDR_QDR_NET_MAX_P3)
- mem_crb = NETXEN_CRB_QDR_NET;
- else {
- mem_crb = NETXEN_CRB_DDR_NET;
- if (netxen_nic_pci_mem_bound_check(adapter, off, size) == 0)
- return netxen_nic_pci_mem_write_direct(adapter,
- off, data, size);
+ if (size != 8)
+ return -EIO;
+
+ if (ADDR_IN_RANGE(off, NETXEN_ADDR_QDR_NET,
+ NETXEN_ADDR_QDR_NET_MAX_P3)) {
+ mem_crb = netxen_get_ioaddr(adapter, NETXEN_CRB_QDR_NET);
+ goto correct;
}
+ if (ADDR_IN_RANGE(off, NETXEN_ADDR_DDR_NET, NETXEN_ADDR_DDR_NET_MAX)) {
+ mem_crb = netxen_get_ioaddr(adapter, NETXEN_CRB_DDR_NET);
+ goto correct;
+ }
+
+ return -EIO;
+
+correct:
off8 = off & 0xfffffff8;
off0 = off & 0x7;
sz[0] = (size < (8 - off0)) ? size : (8 - off0);
@@ -1906,21 +1734,18 @@ netxen_nic_pci_mem_write_2M(struct netxen_adapter *adapter,
*/
for (i = 0; i < loop; i++) {
- temp = off8 + (i << 3);
- NXWR32(adapter, mem_crb+MIU_TEST_AGT_ADDR_LO, temp);
- temp = 0;
- NXWR32(adapter, mem_crb+MIU_TEST_AGT_ADDR_HI, temp);
- temp = word[i] & 0xffffffff;
- NXWR32(adapter, mem_crb+MIU_TEST_AGT_WRDATA_LO, temp);
- temp = (word[i] >> 32) & 0xffffffff;
- NXWR32(adapter, mem_crb+MIU_TEST_AGT_WRDATA_HI, temp);
- temp = MIU_TA_CTL_ENABLE | MIU_TA_CTL_WRITE;
- NXWR32(adapter, mem_crb+MIU_TEST_AGT_CTRL, temp);
- temp = MIU_TA_CTL_START | MIU_TA_CTL_ENABLE | MIU_TA_CTL_WRITE;
- NXWR32(adapter, mem_crb+MIU_TEST_AGT_CTRL, temp);
+ writel(off8 + (i << 3), mem_crb+MIU_TEST_AGT_ADDR_LO);
+ writel(0, mem_crb+MIU_TEST_AGT_ADDR_HI);
+ writel(word[i] & 0xffffffff, mem_crb+MIU_TEST_AGT_WRDATA_LO);
+ writel((word[i] >> 32) & 0xffffffff,
+ mem_crb+MIU_TEST_AGT_WRDATA_HI);
+ writel((MIU_TA_CTL_ENABLE | MIU_TA_CTL_WRITE),
+ mem_crb+MIU_TEST_AGT_CTRL);
+ writel(MIU_TA_CTL_START | MIU_TA_CTL_ENABLE | MIU_TA_CTL_WRITE,
+ mem_crb+MIU_TEST_AGT_CTRL);
for (j = 0; j < MAX_CTL_CHECK; j++) {
- temp = NXRD32(adapter, mem_crb + MIU_TEST_AGT_CTRL);
+ temp = readl(mem_crb + MIU_TEST_AGT_CTRL);
if ((temp & MIU_TA_CTL_BUSY) == 0)
break;
}
@@ -1947,21 +1772,26 @@ netxen_nic_pci_mem_read_2M(struct netxen_adapter *adapter,
{
int i, j = 0, k, start, end, loop, sz[2], off0[2];
uint32_t temp;
- uint64_t off8, val, mem_crb, word[2] = {0, 0};
+ uint64_t off8, val, word[2] = {0, 0};
+ void __iomem *mem_crb;
- /*
- * If not MN, go check for MS or invalid.
- */
+ if (size != 8)
+ return -EIO;
+
+ if (ADDR_IN_RANGE(off, NETXEN_ADDR_QDR_NET,
+ NETXEN_ADDR_QDR_NET_MAX_P3)) {
+ mem_crb = netxen_get_ioaddr(adapter, NETXEN_CRB_QDR_NET);
+ goto correct;
+ }
- if (off >= NETXEN_ADDR_QDR_NET && off <= NETXEN_ADDR_QDR_NET_MAX_P3)
- mem_crb = NETXEN_CRB_QDR_NET;
- else {
- mem_crb = NETXEN_CRB_DDR_NET;
- if (netxen_nic_pci_mem_bound_check(adapter, off, size) == 0)
- return netxen_nic_pci_mem_read_direct(adapter,
- off, data, size);
+ if (ADDR_IN_RANGE(off, NETXEN_ADDR_DDR_NET, NETXEN_ADDR_DDR_NET_MAX)) {
+ mem_crb = netxen_get_ioaddr(adapter, NETXEN_CRB_DDR_NET);
+ goto correct;
}
+ return -EIO;
+
+correct:
off8 = off & 0xfffffff8;
off0[0] = off & 0x7;
off0[1] = 0;
@@ -1976,17 +1806,14 @@ netxen_nic_pci_mem_read_2M(struct netxen_adapter *adapter,
*/
for (i = 0; i < loop; i++) {
- temp = off8 + (i << 3);
- NXWR32(adapter, mem_crb + MIU_TEST_AGT_ADDR_LO, temp);
- temp = 0;
- NXWR32(adapter, mem_crb + MIU_TEST_AGT_ADDR_HI, temp);
- temp = MIU_TA_CTL_ENABLE;
- NXWR32(adapter, mem_crb + MIU_TEST_AGT_CTRL, temp);
- temp = MIU_TA_CTL_START | MIU_TA_CTL_ENABLE;
- NXWR32(adapter, mem_crb + MIU_TEST_AGT_CTRL, temp);
+ writel(off8 + (i << 3), mem_crb + MIU_TEST_AGT_ADDR_LO);
+ writel(0, mem_crb + MIU_TEST_AGT_ADDR_HI);
+ writel(MIU_TA_CTL_ENABLE, mem_crb + MIU_TEST_AGT_CTRL);
+ writel(MIU_TA_CTL_START | MIU_TA_CTL_ENABLE,
+ mem_crb + MIU_TEST_AGT_CTRL);
for (j = 0; j < MAX_CTL_CHECK; j++) {
- temp = NXRD32(adapter, mem_crb + MIU_TEST_AGT_CTRL);
+ temp = readl(mem_crb + MIU_TEST_AGT_CTRL);
if ((temp & MIU_TA_CTL_BUSY) == 0)
break;
}
@@ -2001,8 +1828,7 @@ netxen_nic_pci_mem_read_2M(struct netxen_adapter *adapter,
start = off0[i] >> 2;
end = (off0[i] + sz[i] - 1) >> 2;
for (k = start; k <= end; k++) {
- temp = NXRD32(adapter,
- mem_crb + MIU_TEST_AGT_RDDATA(k));
+ temp = readl(mem_crb + MIU_TEST_AGT_RDDATA(k));
word[i] |= ((uint64_t)temp << (32 * k));
}
}
diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c
index 81c24a7..c6f32e5 100644
--- a/drivers/net/netxen/netxen_nic_main.c
+++ b/drivers/net/netxen/netxen_nic_main.c
@@ -643,9 +643,10 @@ netxen_setup_pci_map(struct netxen_adapter *adapter)
adapter->ahw.ddr_mn_window = 0;
adapter->ahw.qdr_sn_window = 0;
- adapter->ahw.mn_win_crb = 0x100000 + PCIX_MN_WINDOW +
- (pci_func * 0x20);
- adapter->ahw.ms_win_crb = 0x100000 + PCIX_SN_WINDOW;
+ adapter->ahw.mn_win_crb = NETXEN_PCI_CRBSPACE +
+ 0x100000 + PCIX_MN_WINDOW + (pci_func * 0x20);
+ adapter->ahw.ms_win_crb = NETXEN_PCI_CRBSPACE +
+ 0x100000 + PCIX_SN_WINDOW;
if (pci_func < 4)
adapter->ahw.ms_win_crb += (pci_func * 0x20);
else
--
1.6.0.2
--
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