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Miller" , devicetree@vger.kernel.org, Rob Herring , Ian Campbell , Pawel Moll , Mark Rutland , Kumar Gala Subject: [PATCHv2 net-next 06/16] net: mvpp2: adjust the allocation/free of BM pools for PPv2.2 Date: Wed, 28 Dec 2016 17:46:22 +0100 Message-Id: <1482943592-12556-7-git-send-email-thomas.petazzoni@free-electrons.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1482943592-12556-1-git-send-email-thomas.petazzoni@free-electrons.com> References: <1482943592-12556-1-git-send-email-thomas.petazzoni@free-electrons.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20161228_084805_978849_B6FFB68D X-CRM114-Status: GOOD ( 18.48 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thomas Petazzoni , Andrew Lunn , Yehuda Yitschak , Jason Cooper , Hanna Hawa , Nadav Haklai , Gregory Clement , Stefan Chulski , Marcin Wojtas , linux-arm-kernel@lists.infradead.org, Sebastian Hesselbarth MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This commit adjusts the allocation and freeing of BM pools to support PPv2.2. This involves: - Checking that the number of buffer pointers is a multiple of 16, as required by the hardware. - Adjusting the size of the DMA coherent area allocated for buffer pointers. Indeed, PPv2.2 needs space for 2 pointers of 64-bits per buffer, as opposed to 2 pointers of 32-bits per buffer in PPv2.1. The size in bytes is now stored in a new field of the mvpp2_bm_pool structure. - On PPv2.2, the 32 high order bits of the BM pointer area physical address must be programmed in the MVPP2_BM_HIGH_BASE_REG register. - On PPv2.2, getting the physical and virtual address of each buffer requires reading the MVPP2_BM_ADDR_HIGH_ALLOC to get the high order bits of those addresses. A new utility function mvpp2_bm_bufs_get_addrs() is introduced to handle this. - On PPv2.2, releasing a buffer requires writing the high order 32 bits of the physical address to MVPP2_BM_PHY_VIRT_HIGH_RLS_REG. We no longer need to write the virtual address to MVPP2_BM_VIRT_RLS_REG. Signed-off-by: Thomas Petazzoni --- drivers/net/ethernet/marvell/mvpp2.c | 97 ++++++++++++++++++++++++++++++------ 1 file changed, 82 insertions(+), 15 deletions(-) diff --git a/drivers/net/ethernet/marvell/mvpp2.c b/drivers/net/ethernet/marvell/mvpp2.c index 0e00ec0..160b787 100644 --- a/drivers/net/ethernet/marvell/mvpp2.c +++ b/drivers/net/ethernet/marvell/mvpp2.c @@ -208,17 +208,28 @@ #define MVPP2_BM_BPPE_FULL_MASK BIT(3) #define MVPP2_BM_AVAILABLE_BP_LOW_MASK BIT(4) #define MVPP2_BM_INTR_MASK_REG(pool) (0x6280 + ((pool) * 4)) +#define MVPP2_BM_HIGH_BASE_REG 0x6310 +#define MVPP2_BM_HIGH_BASE_MASK 0xff #define MVPP2_BM_PHY_ALLOC_REG(pool) (0x6400 + ((pool) * 4)) #define MVPP2_BM_PHY_ALLOC_GRNTD_MASK BIT(0) #define MVPP2_BM_VIRT_ALLOC_REG 0x6440 +#define MVPP2_BM_ADDR_HIGH_ALLOC 0x6444 +#define MVPP2_BM_ADDR_HIGH_PHYS_MASK 0xff +#define MVPP2_BM_ADDR_HIGH_VIRT_MASK 0xff00 +#define MVPP2_BM_ADDR_HIGH_VIRT_SHIFT 8 #define MVPP2_BM_PHY_RLS_REG(pool) (0x6480 + ((pool) * 4)) #define MVPP2_BM_PHY_RLS_MC_BUFF_MASK BIT(0) #define MVPP2_BM_PHY_RLS_PRIO_EN_MASK BIT(1) #define MVPP2_BM_PHY_RLS_GRNTD_MASK BIT(2) #define MVPP2_BM_VIRT_RLS_REG 0x64c0 -#define MVPP2_BM_MC_RLS_REG 0x64c4 +#define MVPP21_BM_MC_RLS_REG 0x64c4 #define MVPP2_BM_MC_ID_MASK 0xfff #define MVPP2_BM_FORCE_RELEASE_MASK BIT(12) +#define MVPP22_BM_ADDR_HIGH_RLS_REG 0x64c4 +#define MVPP22_BM_ADDR_HIGH_PHYS_RLS_MASK 0xff +#define MVPP22_BM_ADDR_HIGH_VIRT_RLS_MASK 0xff00 +#define MVPP22_BM_ADDR_HIGH_VIRT_RLS_SHIFT 8 +#define MVPP22_BM_MC_RLS_REG 0x64d4 /* TX Scheduler registers */ #define MVPP2_TXP_SCHED_PORT_INDEX_REG 0x8000 @@ -957,6 +968,8 @@ struct mvpp2_bm_pool { /* Buffer Pointers Pool External (BPPE) size */ int size; + /* BPPE size in bytes */ + int size_bytes; /* Number of buffers for this pool */ int buf_num; /* Pool buffer size */ @@ -3558,11 +3571,23 @@ static int mvpp2_bm_pool_create(struct platform_device *pdev, struct mvpp2 *priv, struct mvpp2_bm_pool *bm_pool, int size) { - int size_bytes; u32 val; - size_bytes = sizeof(u32) * size; - bm_pool->virt_addr = dma_alloc_coherent(&pdev->dev, size_bytes, + /* Number of buffer pointers must be a multiple of 16, as per + * hardware constraints + */ + if (!IS_ALIGNED(size, 16)) + return -EINVAL; + + /* PPv2.1 needs 8 bytes per buffer pointer, PPv2.2 needs 16 + * bytes per buffer pointer + */ + if (priv->hw_version == MVPP21) + bm_pool->size_bytes = 2 * sizeof(u32) * size; + else + bm_pool->size_bytes = 2 * sizeof(u64) * size; + + bm_pool->virt_addr = dma_alloc_coherent(&pdev->dev, bm_pool->size_bytes, &bm_pool->phys_addr, GFP_KERNEL); if (!bm_pool->virt_addr) @@ -3570,15 +3595,24 @@ static int mvpp2_bm_pool_create(struct platform_device *pdev, if (!IS_ALIGNED((unsigned long)bm_pool->virt_addr, MVPP2_BM_POOL_PTR_ALIGN)) { - dma_free_coherent(&pdev->dev, size_bytes, bm_pool->virt_addr, - bm_pool->phys_addr); + dma_free_coherent(&pdev->dev, bm_pool->size_bytes, + bm_pool->virt_addr, bm_pool->phys_addr); dev_err(&pdev->dev, "BM pool %d is not %d bytes aligned\n", bm_pool->id, MVPP2_BM_POOL_PTR_ALIGN); return -ENOMEM; } mvpp2_write(priv, MVPP2_BM_POOL_BASE_REG(bm_pool->id), - bm_pool->phys_addr); + lower_32_bits(bm_pool->phys_addr)); + /* On PPv2.2, program the high order bits of the base address */ + if (priv->hw_version == MVPP22) { + if (sizeof(dma_addr_t) == 8) + val = upper_32_bits(bm_pool->phys_addr) & + MVPP2_BM_HIGH_BASE_MASK; + else + val = 0; + mvpp2_write(priv, MVPP2_BM_HIGH_BASE_REG, val); + } mvpp2_write(priv, MVPP2_BM_POOL_SIZE_REG(bm_pool->id), size); val = mvpp2_read(priv, MVPP2_BM_POOL_CTRL_REG(bm_pool->id)); @@ -3606,6 +3640,27 @@ static void mvpp2_bm_pool_bufsize_set(struct mvpp2 *priv, mvpp2_write(priv, MVPP2_POOL_BUF_SIZE_REG(bm_pool->id), val); } +static void mvpp2_bm_bufs_get_addrs(struct device *dev, struct mvpp2 *priv, + struct mvpp2_bm_pool *bm_pool, + dma_addr_t *paddr, unsigned long *vaddr) +{ + *paddr = mvpp2_read(priv, MVPP2_BM_PHY_ALLOC_REG(bm_pool->id)); + *vaddr = mvpp2_read(priv, MVPP2_BM_VIRT_ALLOC_REG); + +#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT + if (priv->hw_version == MVPP22) { + u32 val; + u32 paddr_highbits; + + val = mvpp2_read(priv, MVPP2_BM_ADDR_HIGH_ALLOC); + paddr_highbits = (val & MVPP2_BM_ADDR_HIGH_PHYS_MASK); + + *paddr |= (dma_addr_t)paddr_highbits << 32; + *vaddr = (unsigned long)phys_to_virt(dma_to_phys(dev, *paddr)); + } +#endif +} + /* Free all buffers from the pool */ static void mvpp2_bm_bufs_free(struct device *dev, struct mvpp2 *priv, struct mvpp2_bm_pool *bm_pool) @@ -3616,10 +3671,8 @@ static void mvpp2_bm_bufs_free(struct device *dev, struct mvpp2 *priv, dma_addr_t buf_phys_addr; unsigned long vaddr; - /* Get buffer virtual address (indirect access) */ - buf_phys_addr = mvpp2_read(priv, - MVPP2_BM_PHY_ALLOC_REG(bm_pool->id)); - vaddr = mvpp2_read(priv, MVPP2_BM_VIRT_ALLOC_REG); + mvpp2_bm_bufs_get_addrs(dev, priv, bm_pool, + &buf_phys_addr, &vaddr); dma_unmap_single(dev, buf_phys_addr, bm_pool->buf_size, DMA_FROM_DEVICE); @@ -3651,7 +3704,7 @@ static int mvpp2_bm_pool_destroy(struct platform_device *pdev, val |= MVPP2_BM_STOP_MASK; mvpp2_write(priv, MVPP2_BM_POOL_CTRL_REG(bm_pool->id), val); - dma_free_coherent(&pdev->dev, sizeof(u32) * bm_pool->size, + dma_free_coherent(&pdev->dev, bm_pool->size_bytes, bm_pool->virt_addr, bm_pool->phys_addr); return 0; @@ -3787,8 +3840,19 @@ static inline void mvpp2_bm_pool_put(struct mvpp2_port *port, int pool, dma_addr_t buf_phys_addr, unsigned long buf_virt_addr) { - mvpp2_write(port->priv, MVPP2_BM_VIRT_RLS_REG, buf_virt_addr); - mvpp2_write(port->priv, MVPP2_BM_PHY_RLS_REG(pool), buf_phys_addr); +#if defined(CONFIG_ARCH_DMA_ADDR_T_64BIT) + u32 val; + + val = upper_32_bits(buf_phys_addr) & MVPP22_BM_ADDR_HIGH_PHYS_RLS_MASK; + val |= (upper_32_bits(buf_virt_addr) & + MVPP22_BM_ADDR_HIGH_VIRT_RLS_MASK) + << MVPP22_BM_ADDR_HIGH_VIRT_RLS_SHIFT; + mvpp2_write(port->priv, MVPP22_BM_ADDR_HIGH_RLS_REG, val); +#endif + mvpp2_write(port->priv, MVPP2_BM_VIRT_RLS_REG, + lower_32_bits(buf_virt_addr)); + mvpp2_write(port->priv, MVPP2_BM_PHY_RLS_REG(pool), + lower_32_bits(buf_phys_addr)); } /* Release multicast buffer */ @@ -3800,7 +3864,10 @@ static void mvpp2_bm_pool_mc_put(struct mvpp2_port *port, int pool, u32 val = 0; val |= (mc_id & MVPP2_BM_MC_ID_MASK); - mvpp2_write(port->priv, MVPP2_BM_MC_RLS_REG, val); + if (port->priv->hw_version == MVPP21) + mvpp2_write(port->priv, MVPP21_BM_MC_RLS_REG, val); + else + mvpp2_write(port->priv, MVPP22_BM_MC_RLS_REG, val); mvpp2_bm_pool_put(port, pool, buf_phys_addr | MVPP2_BM_PHY_RLS_MC_BUFF_MASK,