mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
320 lines
9.0 KiB
320 lines
9.0 KiB
/* Copyright (c) 2009 - 2016 Freescale Semiconductor, Inc. |
|
* |
|
* Redistribution and use in source and binary forms, with or without |
|
* modification, are permitted provided that the following conditions are met: |
|
* * Redistributions of source code must retain the above copyright |
|
* notice, this list of conditions and the following disclaimer. |
|
* * Redistributions in binary form must reproduce the above copyright |
|
* notice, this list of conditions and the following disclaimer in the |
|
* documentation and/or other materials provided with the distribution. |
|
* * Neither the name of Freescale Semiconductor nor the |
|
* names of its contributors may be used to endorse or promote products |
|
* derived from this software without specific prior written permission. |
|
* |
|
* ALTERNATIVELY, this software may be distributed under the terms of the |
|
* GNU General Public License ("GPL") as published by the Free Software |
|
* Foundation, either version 2 of that License or (at your option) any |
|
* later version. |
|
* |
|
* THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY |
|
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
|
* DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY |
|
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
|
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
|
*/ |
|
|
|
#include "bman_priv.h" |
|
|
|
u16 bman_ip_rev; |
|
EXPORT_SYMBOL(bman_ip_rev); |
|
|
|
/* Register offsets */ |
|
#define REG_FBPR_FPC 0x0800 |
|
#define REG_ECSR 0x0a00 |
|
#define REG_ECIR 0x0a04 |
|
#define REG_EADR 0x0a08 |
|
#define REG_EDATA(n) (0x0a10 + ((n) * 0x04)) |
|
#define REG_SBEC(n) (0x0a80 + ((n) * 0x04)) |
|
#define REG_IP_REV_1 0x0bf8 |
|
#define REG_IP_REV_2 0x0bfc |
|
#define REG_FBPR_BARE 0x0c00 |
|
#define REG_FBPR_BAR 0x0c04 |
|
#define REG_FBPR_AR 0x0c10 |
|
#define REG_SRCIDR 0x0d04 |
|
#define REG_LIODNR 0x0d08 |
|
#define REG_ERR_ISR 0x0e00 |
|
#define REG_ERR_IER 0x0e04 |
|
#define REG_ERR_ISDR 0x0e08 |
|
|
|
/* Used by all error interrupt registers except 'inhibit' */ |
|
#define BM_EIRQ_IVCI 0x00000010 /* Invalid Command Verb */ |
|
#define BM_EIRQ_FLWI 0x00000008 /* FBPR Low Watermark */ |
|
#define BM_EIRQ_MBEI 0x00000004 /* Multi-bit ECC Error */ |
|
#define BM_EIRQ_SBEI 0x00000002 /* Single-bit ECC Error */ |
|
#define BM_EIRQ_BSCN 0x00000001 /* pool State Change Notification */ |
|
|
|
struct bman_hwerr_txt { |
|
u32 mask; |
|
const char *txt; |
|
}; |
|
|
|
static const struct bman_hwerr_txt bman_hwerr_txts[] = { |
|
{ BM_EIRQ_IVCI, "Invalid Command Verb" }, |
|
{ BM_EIRQ_FLWI, "FBPR Low Watermark" }, |
|
{ BM_EIRQ_MBEI, "Multi-bit ECC Error" }, |
|
{ BM_EIRQ_SBEI, "Single-bit ECC Error" }, |
|
{ BM_EIRQ_BSCN, "Pool State Change Notification" }, |
|
}; |
|
|
|
/* Only trigger low water mark interrupt once only */ |
|
#define BMAN_ERRS_TO_DISABLE BM_EIRQ_FLWI |
|
|
|
/* Pointer to the start of the BMan's CCSR space */ |
|
static u32 __iomem *bm_ccsr_start; |
|
|
|
static inline u32 bm_ccsr_in(u32 offset) |
|
{ |
|
return ioread32be(bm_ccsr_start + offset/4); |
|
} |
|
static inline void bm_ccsr_out(u32 offset, u32 val) |
|
{ |
|
iowrite32be(val, bm_ccsr_start + offset/4); |
|
} |
|
|
|
static void bm_get_version(u16 *id, u8 *major, u8 *minor) |
|
{ |
|
u32 v = bm_ccsr_in(REG_IP_REV_1); |
|
*id = (v >> 16); |
|
*major = (v >> 8) & 0xff; |
|
*minor = v & 0xff; |
|
} |
|
|
|
/* signal transactions for FBPRs with higher priority */ |
|
#define FBPR_AR_RPRIO_HI BIT(30) |
|
|
|
/* Track if probe has occurred and if cleanup is required */ |
|
static int __bman_probed; |
|
static int __bman_requires_cleanup; |
|
|
|
|
|
static int bm_set_memory(u64 ba, u32 size) |
|
{ |
|
u32 bar, bare; |
|
u32 exp = ilog2(size); |
|
/* choke if size isn't within range */ |
|
DPAA_ASSERT(size >= 4096 && size <= 1024*1024*1024 && |
|
is_power_of_2(size)); |
|
/* choke if '[e]ba' has lower-alignment than 'size' */ |
|
DPAA_ASSERT(!(ba & (size - 1))); |
|
|
|
/* Check to see if BMan has already been initialized */ |
|
bar = bm_ccsr_in(REG_FBPR_BAR); |
|
if (bar) { |
|
/* Maker sure ba == what was programmed) */ |
|
bare = bm_ccsr_in(REG_FBPR_BARE); |
|
if (bare != upper_32_bits(ba) || bar != lower_32_bits(ba)) { |
|
pr_err("Attempted to reinitialize BMan with different BAR, got 0x%llx read BARE=0x%x BAR=0x%x\n", |
|
ba, bare, bar); |
|
return -ENOMEM; |
|
} |
|
pr_info("BMan BAR already configured\n"); |
|
__bman_requires_cleanup = 1; |
|
return 1; |
|
} |
|
|
|
bm_ccsr_out(REG_FBPR_BARE, upper_32_bits(ba)); |
|
bm_ccsr_out(REG_FBPR_BAR, lower_32_bits(ba)); |
|
bm_ccsr_out(REG_FBPR_AR, exp - 1); |
|
return 0; |
|
} |
|
|
|
/* |
|
* Location and size of BMan private memory |
|
* |
|
* Ideally we would use the DMA API to turn rmem->base into a DMA address |
|
* (especially if iommu translations ever get involved). Unfortunately, the |
|
* DMA API currently does not allow mapping anything that is not backed with |
|
* a struct page. |
|
*/ |
|
static dma_addr_t fbpr_a; |
|
static size_t fbpr_sz; |
|
|
|
static int bman_fbpr(struct reserved_mem *rmem) |
|
{ |
|
fbpr_a = rmem->base; |
|
fbpr_sz = rmem->size; |
|
|
|
WARN_ON(!(fbpr_a && fbpr_sz)); |
|
|
|
return 0; |
|
} |
|
RESERVEDMEM_OF_DECLARE(bman_fbpr, "fsl,bman-fbpr", bman_fbpr); |
|
|
|
static irqreturn_t bman_isr(int irq, void *ptr) |
|
{ |
|
u32 isr_val, ier_val, ecsr_val, isr_mask, i; |
|
struct device *dev = ptr; |
|
|
|
ier_val = bm_ccsr_in(REG_ERR_IER); |
|
isr_val = bm_ccsr_in(REG_ERR_ISR); |
|
ecsr_val = bm_ccsr_in(REG_ECSR); |
|
isr_mask = isr_val & ier_val; |
|
|
|
if (!isr_mask) |
|
return IRQ_NONE; |
|
|
|
for (i = 0; i < ARRAY_SIZE(bman_hwerr_txts); i++) { |
|
if (bman_hwerr_txts[i].mask & isr_mask) { |
|
dev_err_ratelimited(dev, "ErrInt: %s\n", |
|
bman_hwerr_txts[i].txt); |
|
if (bman_hwerr_txts[i].mask & ecsr_val) { |
|
/* Re-arm error capture registers */ |
|
bm_ccsr_out(REG_ECSR, ecsr_val); |
|
} |
|
if (bman_hwerr_txts[i].mask & BMAN_ERRS_TO_DISABLE) { |
|
dev_dbg(dev, "Disabling error 0x%x\n", |
|
bman_hwerr_txts[i].mask); |
|
ier_val &= ~bman_hwerr_txts[i].mask; |
|
bm_ccsr_out(REG_ERR_IER, ier_val); |
|
} |
|
} |
|
} |
|
bm_ccsr_out(REG_ERR_ISR, isr_val); |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
int bman_is_probed(void) |
|
{ |
|
return __bman_probed; |
|
} |
|
EXPORT_SYMBOL_GPL(bman_is_probed); |
|
|
|
int bman_requires_cleanup(void) |
|
{ |
|
return __bman_requires_cleanup; |
|
} |
|
|
|
void bman_done_cleanup(void) |
|
{ |
|
__bman_requires_cleanup = 0; |
|
} |
|
|
|
static int fsl_bman_probe(struct platform_device *pdev) |
|
{ |
|
int ret, err_irq; |
|
struct device *dev = &pdev->dev; |
|
struct device_node *node = dev->of_node; |
|
struct resource *res; |
|
u16 id, bm_pool_cnt; |
|
u8 major, minor; |
|
|
|
__bman_probed = -1; |
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
|
if (!res) { |
|
dev_err(dev, "Can't get %pOF property 'IORESOURCE_MEM'\n", |
|
node); |
|
return -ENXIO; |
|
} |
|
bm_ccsr_start = devm_ioremap(dev, res->start, resource_size(res)); |
|
if (!bm_ccsr_start) |
|
return -ENXIO; |
|
|
|
bm_get_version(&id, &major, &minor); |
|
if (major == 1 && minor == 0) { |
|
bman_ip_rev = BMAN_REV10; |
|
bm_pool_cnt = BM_POOL_MAX; |
|
} else if (major == 2 && minor == 0) { |
|
bman_ip_rev = BMAN_REV20; |
|
bm_pool_cnt = 8; |
|
} else if (major == 2 && minor == 1) { |
|
bman_ip_rev = BMAN_REV21; |
|
bm_pool_cnt = BM_POOL_MAX; |
|
} else { |
|
dev_err(dev, "Unknown Bman version:%04x,%02x,%02x\n", |
|
id, major, minor); |
|
return -ENODEV; |
|
} |
|
|
|
/* |
|
* If FBPR memory wasn't defined using the qbman compatible string |
|
* try using the of_reserved_mem_device method |
|
*/ |
|
if (!fbpr_a) { |
|
ret = qbman_init_private_mem(dev, 0, &fbpr_a, &fbpr_sz); |
|
if (ret) { |
|
dev_err(dev, "qbman_init_private_mem() failed 0x%x\n", |
|
ret); |
|
return -ENODEV; |
|
} |
|
} |
|
|
|
dev_dbg(dev, "Allocated FBPR 0x%llx 0x%zx\n", fbpr_a, fbpr_sz); |
|
|
|
bm_set_memory(fbpr_a, fbpr_sz); |
|
|
|
err_irq = platform_get_irq(pdev, 0); |
|
if (err_irq <= 0) { |
|
dev_info(dev, "Can't get %pOF IRQ\n", node); |
|
return -ENODEV; |
|
} |
|
ret = devm_request_irq(dev, err_irq, bman_isr, IRQF_SHARED, "bman-err", |
|
dev); |
|
if (ret) { |
|
dev_err(dev, "devm_request_irq() failed %d for '%pOF'\n", |
|
ret, node); |
|
return ret; |
|
} |
|
/* Disable Buffer Pool State Change */ |
|
bm_ccsr_out(REG_ERR_ISDR, BM_EIRQ_BSCN); |
|
/* |
|
* Write-to-clear any stale bits, (eg. starvation being asserted prior |
|
* to resource allocation during driver init). |
|
*/ |
|
bm_ccsr_out(REG_ERR_ISR, 0xffffffff); |
|
/* Enable Error Interrupts */ |
|
bm_ccsr_out(REG_ERR_IER, 0xffffffff); |
|
|
|
bm_bpalloc = devm_gen_pool_create(dev, 0, -1, "bman-bpalloc"); |
|
if (IS_ERR(bm_bpalloc)) { |
|
ret = PTR_ERR(bm_bpalloc); |
|
dev_err(dev, "bman-bpalloc pool init failed (%d)\n", ret); |
|
return ret; |
|
} |
|
|
|
/* seed BMan resource pool */ |
|
ret = gen_pool_add(bm_bpalloc, DPAA_GENALLOC_OFF, bm_pool_cnt, -1); |
|
if (ret) { |
|
dev_err(dev, "Failed to seed BPID range [%d..%d] (%d)\n", |
|
0, bm_pool_cnt - 1, ret); |
|
return ret; |
|
} |
|
|
|
__bman_probed = 1; |
|
|
|
return 0; |
|
}; |
|
|
|
static const struct of_device_id fsl_bman_ids[] = { |
|
{ |
|
.compatible = "fsl,bman", |
|
}, |
|
{} |
|
}; |
|
|
|
static struct platform_driver fsl_bman_driver = { |
|
.driver = { |
|
.name = KBUILD_MODNAME, |
|
.of_match_table = fsl_bman_ids, |
|
.suppress_bind_attrs = true, |
|
}, |
|
.probe = fsl_bman_probe, |
|
}; |
|
|
|
builtin_platform_driver(fsl_bman_driver);
|
|
|